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Oki OKIFAX 5250 Service Manual

Oki OKIFAX 5250 Service Manual

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Table of Contents

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Service Guide OKIFAX 5250/5400
Chapter
0 About This Manual
Front Cover
OKIFAX
5250 & 5400
Facsimile Products
Adobe Acrobat printable reference copy
of the OKIDATA Service Training Manual.
11/16/99
Note: This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures
rendered at 72 dpi, which is ideal for screen viewing. For future updates to this manual, and
Business Partner Exchange (BPX) at
more on-line information visit our
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  • Page 1 Service Guide OKIFAX 5250/5400 Chapter 0 About This Manual Front Cover OKIFAX 5250 & 5400 Facsimile Products Adobe Acrobat printable reference copy of the OKIDATA Service Training Manual. 11/16/99 Note: This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures rendered at 72 dpi, which is ideal for screen viewing.

  • Page 2: Table Of Contents

    Table of Contents Page Service Guide OKIFAX 5250/5400 0 Introduction Preface 1 General Information 1.1 General Performance 1.2 General User's Function 1.3 General Maintenance Functions 1.4 General Appearance 1.5 Basic Performance Specifications ..Table 1.5.1 (1/9) Basic Performance Specifications ..Table 1.5.1 (2/9) Basic Performance Specifications ..Table 1.5.1 (3/9) Basic Performance Specifications...
  • Page 3 Table of Contents Page ..2.9.4 User's Functions ..Feature Specifications ..Dual Access Combination Table (1/2) ..Dual Access Combination Table (2/2) ..2)-1 One-Touch Key Operations ..One-Touch Key Program Settings (Table 2.9.4) ..2)-2 Function Program ..2.9.5 User's Functions Example ..User's Functions Table ..2.9.6 Clock Adjustment ..2.9.7 Dual Access Operation ..2.9.8 System Data Programming ..2.9.9 Dial Parameters Settings...
  • Page 4 Table of Contents Page 5.3 Measurement ..Measurement Points on M17 Board 6 Cleaning and Maintenance 6.1 Consumables Replacement ..Service Technician Replaceable ..Replaceable Items Diagram ..Others - Reliability 6.2 Routine Inspection ..Routine Inspection ..Preventative Maintenance Diagram 6.3 Printer Counter Display/Clear (User) 6.4 Printer Counter Display/Clear (Service) 6.5 Self-Diagnosis Test ..Self-Diagnosis Test Sample...

  • Page 5: General Information

    Table of Contents Page ..7.21 Document Jam ..7.22 Printer Unit ..7.22.1 Precautions ..7.22.2 Troubleshooting Flow Charts of Printer Unit ....Overall Troubleshooting Flowchart ....1: Top Cover is Open ....2: Replace Image Drum Message ....3: Engine Controller Error ....4: Fan Motor Rotation Error ....5: Fuser Unit Thermal Error ....6: Paper Jams ....7: No Paper Tray or No Paper...
  • Page 6 Table of Contents Page ..A3.1.3 E17 - Audio Monitor Circuit Diagram ..Block Diagram of Audio Monitor Circuit ..A3.1.4 E17 - CIS (contact image sensor) Block Diagram ..Block Diagram of CIS (contact image sensor) ..A3.1.5 IEXSEED300 Diagram ..Related Signals of IEXSEED300 ..A3.1.6 E17 - Modem Diagram ..Related Signals of Modem ..A3.1.7 E17 - NCU, OPE, and PC1/PC2 Circuit Diagram...
  • Page 7 Table of Contents Page ....5-5 Cover open circuit ..A3.3.2 1VP (for 120V)/2VP (for 230V) Circuit Diagram (2/2) ..5-6 High-voltage Section ..5-6-1 Functional overview ..5-6-2 SB2, DB1, DB2 and CB ..5-6-3 TR1 and TR2 ..5-6-4 CH ..5-7 Photosensors A3.4 UNC, WN5, FN5 and DN5 Circuit Diagram ..UNC (NCU) Circuit Diagram ..Block Diagram of UNC ..WN5 Circuit Diagram...
  • Page 8 Table of Contents Page ..8) Cleaning of rollers ..B.3 Errors ..B.3.1 Errors List ..B.3.2 Major Trouble Errors ....B.3.2.1 Fuser Error ....B.3.2.2 Fan Error ....B.3.2.3 Paper Feed Monitoring ....B.3.2.4 2'nd Tray Communication Error (Printer Alarm 2) 294 ....B.3.2.5 Cover Open ..B3.3.3 Recoverable Errors ....B3.3.3.1 Toner Low Detection ....Composition ....Operation...
  • Page 9 Table of Contents Page ..3.3 Parts Replacement Methods ..3.3.1 Stepping Motor (Hopping) ..3.3.2 TQSB2-PCB ..3.3.3 Hopping Roller Shaft Assy and One-way Clutch Gear 337 4. Troubleshooting ..4.1 Precautions Prior to the Troubleshooting ..4.2 Preparations for the Troubleshooting ..4.3 Troubleshooting Method ..4.3.1 LCD Status Message List 5.
  • Page 10 Table of Contents Page I. General Information ..OKIDATA'S Web Site...
  • Page 11 Service Guide OKIFAX 5250/5400 Chapter 0 Introduction Preface This manual is intended to be used for installing and maintaining OKIFAX 5250/5400 facsimile unit. Maintenance of the OKIFAX 5250/5400 is assumed to be conducted at the following levels: Assembly-level maintenance for mechanical portions Unit-level maintenance for electrical at portions CAUTION: DANGER OF EXPLOSION IF BATTERY IS INCORRECTLY REPLACED.

  • Page 12: General Performance

    128 mm to 356 mm (5.06 inches to 14 inches) (Length setting: Unlimited (1500 mm) is also available.) (07) Automatic document feeder (ADF) 30 sheets (Letter/A4-size: 20-1b bond. Oki Data recommended paper) 15 sheets (Letter/A4-size: 13 to 28-1b bond (08) Recording paper or sheet...
  • Page 13 This is Phase C time at 3.85 line/mm and 28800 bps for 3 sec. and 14400 bps for 6 sec. in MMR code transmission. (22) Protocol ITU-T Rec. T.30 OKI special protocols: High-speed protocol (23) Error correction mode (ECM) (24) Communication mode...
  • Page 14 By installing the optional board (CTR board), the MFP PC Printer Function function can be realized: PC Scanner Function PC Fax Modem Function Location Programming Function Note: For details, see "Product Specification for MFP".

  • Page 15: General User's Function

    G3 sequential broadcast (Memory) Broadcast mode OKIFAX 5250:: 89 stations at maximum (15 speed dials + 64 auto dials + 10 keypad dials) OKIFAX 5400: 134 stations at maximum (30 speed dials + 99 auto dials + 10 keypad dials)
  • Page 16 (30) Programmed key operation ("F" key + "OT" key) (31) Auto dialing One-touch dialing OF5250: 15 / OF5400: 30 Two-digit automatic dialing OF5250: 64 / OF5400: 99 Keypad dialing Chain dialing Mixed dialing Group dialing OF5250: 10 / OF5400: 20 (32) Real-time dialing (In case of optional handset is installed or Hook key)

  • Page 17: General Maintenance Functions

    Page: 4 Service Guide OKIFAX 5250/5400 Chapter 1 General Information 1.3 General Maintenance Functions (01) Self-diagnosis CPU ROM/RAM check FLASH (/MASK) memory check (Program, Language, Default) RAM check RAM check (MEMORY board: option) PC-IF board (parallel) check Print test (02)

  • Page 18: General Appearance

    Page: 5 Service Guide OKIFAX 5250/5400 Chapter 1 General Information 1.4 General Appearance Figure 1.4.1 shows the general appearance. Figure 1.4.2 shows the control panel. General Appearance of the OKIFAX 5250 / OKIFAX 5400...

  • Page 20: Basic Performance Specifications

    Page: 6 Service Guide OKIFAX 5250/5400 Chapter 1 General Information 1.5 Basic Performance Specifications Note: TF: Technical function setting FP: Function program setting OT: One-touch key pressed F: SELECT FUNCTION key pressed Table 1.5.1 (1/9) Basic Performance Specifications Table 1.5.1 (2/9) Basic Performance Specifications Table 1.5.1 (3/9) Basic Performance Specifications...
  • Page 21 Page: 7 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Table 1.5.1 (1/9) Basic Performance Specifications Item Specifications Applicable line 1) Public switched telephone network (PSTN) 2) Private branch exchange (PBX) (OT9+2) Line interface 1) Impedance 600 Ohms balanced Note: Impedance may differ by the requirement of PTT.
  • Page 22 Page: 8 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Table 1.5.1 (2/9) Basic Performance Specifications Item Specifications Effective reading width Document width Communication Effective reading width Copy size Mode/Paper width ISO A4 (210 mm) G3/A4 208 mm for TX [INTL/FTZ] 202.8 mm for local copy...
  • Page 23 Note: One single sheet should be loaded on the manual paper feeder for one occasion. For best results use Oki Data recommended papers 1) Xerox 4200 (20 - lb/75 gm base weight paper) 2) L-type paper for photo-printers Recording paper cassette...
  • Page 24 Page: 10 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Table 1.5.1 (4/9) Basic Performance Specifications Item Specifications Effective recording area Note: These tables do not include vertical or horizontal addressing deviation (+ or - 2 mm) of recording paper.
  • Page 25 These tables do not include vertical and horizontal addressing error (+/- 3 mm) of recording paper. Item Specifications Copy stacking The fax can discharge printed copies and stack them face down. Maximum sheets on the copy stacker: 100 Note*: Oki Data recommended paper...
  • Page 26 Page: 11 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Table 1.5.1 (5/9) Basic Performance Specifications Item Specifications Scanning resolution Horizontal: 300 dot/inch Vertical: Transmission mode: 3.85 line/mm (STD), 7.7 line/mm (FINE), or 300 dot/inch, (EX. FINE) COPY mode: 7.7 line/mm (FINE) or 300 dot/inch (EX. FINE)
  • Page 27 Item Specifications Minimum scan line time for 0 ms, when receiving in ECM mode or from an Oki Data facsimile. receiving 5 ms at 15.4 line/mm or 7.7 line/mm and 10 ms at 3.85 line/mm when receiving from a non-Oki Data facsimile or non-ECM mode.
  • Page 28 Page: 13 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Table 1.5.1 (7/9) Basic Performance Specifications Item Specifications Protocol 1) ITU-T Rec. T.30 2) Oki Data special protocol High-speed protocol The T.30 protocol signal from the transmitting station is sent at message transmission speed instead of 300 bps.
  • Page 29 Page: 14 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Table 1.5.1 (8/9) Basic Performance Specifications Item Specifications Telephone handset (option) General telephone function is available while the power is on. Note: In the fax special versions, general telephone is available even when the power is off.
  • Page 31 Page: 15 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Table 1.5.1 (9/9) Basic Performance Specifications In operation Power off mode During Storage Unit Temperature 50 - 90 32 - 110 14-110 (10-32) (0-43) (-10 - 43) Humidity 20 - 80...
  • Page 32 Minimum difference 35.6 35.6 ---- between wet and dry bulb temperatures 1. Storage conditions specified above apply to the machine in packed condition. 2. Temperature and humidity must be in the range where no condensation occurs. Item Specifications Dimension (Main body) 1) Width: Approx.

  • Page 33: Reports And Lists

    Page: 16 Service Guide OKIFAX 5250/5400 Chapter 1 General Information 1.6 Reports and Lists The following table shows Reports and Lists Specifications. Note: F +OT: Press FUNCTION and One-touch key FP: Function program setting TF: Technical function setting Item Specifications...
  • Page 34 Page: 17 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Call-back Message (Example) (1) Date and time (2) Sender ID (3) CSI/Personal ID (4) Letters "PLEASE CALL BACK" (5) Sender ID (6) Sender's call back telephone number...

  • Page 35: Sender Id Format: (Example)

    Page: 18 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Sender ID Format: (Example)

  • Page 36: Tsi Printing (Example)

    Page: 19 Service Guide OKIFAX 5250/5400 Chapter 1 General Information TSI Printing (Example) Local Date and Time Printing (Example) Note: TSI printing (TF+05) Local date and time printing (TF+04)

  • Page 37: Cancel Report Format: Power Outage Report (Example)

    Page: 20 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Cancel Report Format: Power Outage Report (Example) Note: Memory reception only is printed on the mode in the report as called.

  • Page 38: Activity Report (Example)

    Page: 21 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Activity Report (Example)
  • Page 39 Explanation of Example...
  • Page 40 (1) Title of the report (2) Date and time when the report was printed (3) Sender ID (4) Total CALLING and CALLED time (5) Date of transmission or reception (6) Time when the communication started (7) Time span of the fax communication. (8) Identification of the remote station Personal ID/Location ID/TSI/CSI/Dial number or space (9) Communication mode:...

  • Page 41: Message Confirmation Report

    Page: 22 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Message Confirmation Report...
  • Page 42 Explanation of Example (1) Title of the report (2) Date and time when the report was printed (3) Sender ID (4) Date of transmission or reception (5) Length of time for which the fax was connected to the line (6) Identification of the remote station Personal ID/Location ID/TSI/CSI/Dial number (7) Communication mode Reference to ACTIVITY REPORT...

  • Page 43: Broadcast Entry Report (Example)

    Page: 23 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Broadcast Entry Report (Example)
  • Page 45 * 1: Identification of remote station Personal ID, TSI, Location ID or Dial Number (Printing in this order depending if information is programmed in remote fax machine).

  • Page 46: Broadcast Confirmation Report (Example)

    Page: 24 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Broadcast Confirmation Report (Example) * 1: Identification of remote station Personal ID, TSI, Location ID or Dial Number (Printing in this order depending if information is programmed in remote fax machine).

  • Page 47: Confidential Reception Report (Example)

    Page: 25 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Confidential Reception Report (Example)

  • Page 48: Telephone Directory (Examples 1 Through 6)

    Page: 26 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Telephone Directory (Examples 1 through 6) Example 1 of 6...
  • Page 50 Example 2 of 6...
  • Page 52 Example 3 of 6 Example 4 of 6...
  • Page 54 Example 5 of 6...
  • Page 56 Example 6 of 6...

  • Page 59: Configuration Report

    Page: 27 Service Guide OKIFAX 5250/5400 Chapter 1 General Information Configuration Report...

  • Page 62: Installation Procedures

    Page: 28 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.1 General The following flowchart outlines the installation procedure.
  • Page 65 Page: 29 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.2 Site Selection Precautions for Installation (01) Fluctuation in line voltage 120VAC (102V to 127V) 230VAC (198V to 264V) (02) Room temperature 50 to 90°F (10 to 32°C) (03) Humidity...
  • Page 67 Page: 30 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.3 Unpacking Unpacking Procedure 1 (01) Remove tape on the top of the carton box and open its cover. (02) Take out the accessory box from the carton box. (03) Take out the machine with plastic wrapper from the box.
  • Page 68 Unpacking Procedure 3...
  • Page 70 After having taken out the machine and accompanied accessories from the carton box, check the contents according to the following list: Contents List Item No. Name Q'ty Remarks OKIFAX 5250 / OF 5400 machine AC power cord Image Drum Unit Already installed. Toner cartridge Document stacker Line cord One touch sheet Already installed.
  • Page 71 Page: 32 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.5 Installation of Attachments (01) Items Image Drum (ID) Unit (already installed) Toner cartridge Recording paper Document stacker (02) Procedure 1) Toner cartridge Peel off the fixed tape attached to the copy stacker.
  • Page 72 Take out the toner cartridge from the damp proof bag, shake it five or six times as shown in the illustration to eliminate the toner deflection, and peel off the seal gently. Ensure that the plastic tab on the right-hand side of the toner cartridge recess lines up with the groove on the toner cartridge.
  • Page 73 Clean the toner scattered in the vicinity of the toner cartridge using a cloth moistened with cold water. Do not use hot water since it makes the toner stick there. Close the copy stacker until the buttons have been locked completely. (03) Recording Paper Cassette Installation Note: About 250 sheets of 20 lb.
  • Page 74 (04) Document Stacker Installation Place the document stacker into the hanging position.
  • Page 75 Page: 33 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.6 AC Cord Connection The power supply is provided as follows. Nominal input voltage 120VAC (Voltage range 102 to 127VAC) Nominal input voltage 230VAC (Voltage range 198 to 250VAC) Check whether the AC voltage of your input is within the above-mentioned voltage range.
  • Page 76 Page: 34 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.7 Telephone and Line Connections (1) Procedure Connect the lines.
  • Page 77 Page: 35 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.8 Packing for Shipment CAUTION: When packing the unit for shipment, REMOVE THE IMAGE DRUM AND TONER FROM THE UNIT AND SHIP SEPARATELY! Failure to do so will result in damage to the machine.
  • Page 78 Page: 36 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9 Initial Settings 2.9.1 Key Operation Flowchart 2.9.2 Technical Functions 2.9.3 Technical Functions Example 2.9.4 User's Functions 2.9.5 User's Functions Examples 2.9.6 Clock Adjustment 2.9.7 Dual Access Operation 2.9.8 System Data Programming 2.9.9 Dial Parameter Settings...
  • Page 79 Page: 37 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9.1 General Procedure of Key Operation Figure 2.9.1 below shows the general procedure of key operation.
  • Page 84 Page: 38 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9.2 Technical Functions This section explains setting items generally conducted by service personnel, not by users. The tables show the initial setting items and their purposes. (The default settings differ by country.) Each item can be accessed by entering the corresponding service number on Technical Function.
  • Page 85 Page: 39 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures Technical Functions Table This table shows the initial setting items and their purposes. The default settings may differ by country. Each item can be accessed by entering the corresponding service number on Technical Function.
  • Page 86 TAD mode For an external telephone answering device. Allows the TYPE2 OKIFAX to share a telephone line with an answering (For external telephone device. answering device) If the REMOTE RX Function is set to a value other than OFF, that code can be used to force FAX RX during TAD MODE.
  • Page 87 High-speed modem rate Specifies the modem's starting speed, 33.6K, 28.8K, 14.4k, 28.8 9.6k, or 4.8kbps. Note: The following protocol is added to OKIFAX 5600-Plus: ITU-T standard V.34 for 33.6K or 28.8 kbps operation. T1 (TX), timeout value Registers the time duration (in seconds) for which the fax 059 sec.
  • Page 88 CML timing Selects the time from end of ring to CML-ON. Adjusting time is 100 MS to 1900 MS in 100 MS steps. 0 to 19 selectable. For example: (300 ms) 03 x 100 ms = 300 ms Strobe for LED head Setting of LED print head strobe signals (00000-11111).
  • Page 89 Symbol rate Symbol rate (later) Selects the V.34 modem symbol rate for 2800 OKIFAX 5600-Plus. 2400, 2800, 3200, 3429 selectable.
  • Page 90 Page: 40 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures TEL/FAX Automatic Switching (Technical Function 09) This function is used for the purpose of TEL/FAX automatic switching as follows: (1) If the machine detects a call with a CNG signal indicating an auto send facsimile call, it starts an automatic document receiving operation.
  • Page 91 Notes: *1: Ring Back Tone -- 1 sec. ON, 3.2 sec. OFF *2: When you want to talk by phone, pick up handset *3: The called party can send CED to the calling party immediately to start FAX communications if the CNG is detected during the period.
  • Page 92 Page: 41 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures TAD Mode (Technical Function 07) TAD: Telephone Answering Device TAD can be connected to external telephone terminal to record your messages. TAD records your speech and switches an automatic voice message response to the calling station.
  • Page 93 NOTE: If REMOTE RX Function is set to a value other than OFF, that code can be used to force FAX RX during TAD Mode Operation. TAD Mode Flowchart (Type 2) If the fax does not detect CNG signal during working of TAD, the machine will go to standby mode. NOTE: If REMOTE RX Function is set to a value other than OFF, that code can be used to force FAX RX during TAD Mode Operation.
  • Page 94 Page: 42 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9.3 Technical Functions Example Note: The fonts displayed on the LCD operation panel may differ from the fonts written this manual. Setting the Service Bit 1) Purpose To enable or disable the following functions:...
  • Page 95 Technical Functions 01-11 Technical Functions 12-16 Technical Functions 17-23 Technical Functions 24-27...
  • Page 96 Technical Functions 28-31...
  • Page 97 Page: 43 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures Technical Functions 01 to 11...
  • Page 100 Page: 44 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures Technical Functions 12 to 16...
  • Page 102 Page: 45 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures Technical Functions 17 to 23...
  • Page 105 Page: 46 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures Technical Functions 24 to 27...
  • Page 108 Page: 47 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures Technical Functions 28 to 31...
  • Page 109 Page: 48 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9.4 User's Functions This section explains the items usually set up by general users. The following table shows the initial setting items and their purposes. Each function program setting (FP) can be accessed by entering the corresponding function number on Function Programming.
  • Page 110 Auto dial 15/30 one-touch keys are provided. 1) One-touch dial (OKIFAX 5250 = 15 keys / OKIFAX 5400 = 30 keys) Max. 32 digits for each location number. In addition to an ordinary location number, another alternate location number can be registered in to each one-touch key.
  • Page 111 Location ID (Alpha Search) be assigned to each of one-touch keys and two-digit dial codes, 01 to 64 for OKIFAX 5250 and 01 to 99 for OKIFAX 5400. This name is called a location ID. Any location ID can be searched and displayed on LCD.
  • Page 112 Broadcast (Memory transmission) Maximum 84 (OKIFAX 5250) and Maximum 134 (OKIFAX 5400) remote locations can be specified by the following means: One-touch keys (with of without a group list). Two-digit auto dial codes. 5 keypad dial number One delayed time of calling for this feature can be specified unless any other delayed calling feature has been specified.
  • Page 113 Dual Access The documents for transmission can be read into the memory even while the fax is engaged in another memory transmission, reception in the ECM or non-ECM mode. 1) Operation of memory transmission while the fax is engaged in a communication (memory TX, memory RX or print mode RX).
  • Page 114 Page: 50 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures Dual Access Combination Table (1/2)
  • Page 115 Page: 51 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures Dual Access Combination Table (2/2)
  • Page 116 Page: 52 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2)-1 One-Touch Key Operations...
  • Page 119 Page: 53 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures One-Touch Key Program Settings (Table 2.9.4) F+OT Specifications Item Delayed transmission (Tx) This function enters a message transmission time(s) and location(s) for execution at a specified time. Broadcast/memory transmission To make a one-time selection of the memory transmission mode.
  • Page 120 (3) ID for the telephone directory function in 15 characters (alphabetic, numeric and symbolic). (One ID can be registered for one key). (4) 15 one-touch keys are provided (OKIFAX 5250). 30 one-touch keys are provided (OKIFAX 5400). 2. Two-digit auto dial program Auto-dial No.
  • Page 121 User's programs Function program 1. Function program 01: MCF (SINGLE-LOC.) 02: MCF (MULTI-LOC.) 03: ERR. REPORT (MCF.) 04: IMAGE IN MCF. 05: SENDER ID 06: MONITOR VOLUME 07: BUZZER VOLUME 08: CLOSED NETWORK 09: TX MODE DEFAULT 10: T/F TIMER PRG. 11: RING RESPONSE 12: DISTINCTIVE RING 13: 1’ST PAPER SIZE...
  • Page 122 Printing is enabled for received message in the personal box in memory only when the password entered by the operator matches that already registered to the box. 8 mailboxes for OKIFAX 5250 16 mailboxes for OKIFAX 5400 3. Printer cleaning This drum cleaning function removes the residual toner on the image drum surface by printing.
  • Page 123 Page: 54 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2)-2 Function Program User Function Program Settings (Table 2.9.4) Part 1 of 4 P.F. Item Specifications Default Message confirmation report Enables or disables the automatic message confirmation (Single location) report printing after a single location call.
  • Page 124 Closed network The fax compares lower four digits of TSI/CSI received from remote station with fax numbers registered locally for one-touch dial and two-digits autodial. If unmatched, the communication will be automatically disconnected. OFF/RX only/TX and RX selectable. * Prevention of direct mail or wrong number calls. (Reference) TSI: Transmitting subscriber identification CSI: Called subscriber identification...
  • Page 125 User language A choice of 2 languages for LCD and print message are available. Languages: English and French Incoming ring Instead of ringer circuit, software can control built-in speaker to ring sound. To enable (ON) or disable (OFF) or distinctive ring (DRC) a software generated ring sound to indicate arrival of an incoming bell.
  • Page 126 Page: 55 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9.5 User's Functions Example Note: The font displayed on the LCD operation panel may differ from fonts written in this manual. 1) Function Program...
  • Page 127 Page: 56 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures User's Functions Table...
  • Page 133 2) Ring response time Before specifying the ring response time, set the service bit on following the operations shown in 2.9.3 (1) (Service Bit Setting). 3) Dial parameters (Service Bit "OFF") To get the "DIAL PARAMETER" message on the display, perform the same operation as Table 2.9.6 (Dial parameter settings).
  • Page 135 The following table can be set depending on the National codes even if the service bit is "off".
  • Page 137 Note: The blank in the table is not indicated on the LCD.
  • Page 138 Page: 57 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9.6 Clock Adjustment...
  • Page 139 Page: 58 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9.7 Dual Access Operation...
  • Page 142 Page: 59 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9.8 System Data Programming TSI/CSI (Default: Blank) Registration of sender ID (Default: Blank) Registration of telephone number for the call-back message (Default: Blank)
  • Page 145 Page: 60 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9.9 Dial Parameters Settings...
  • Page 147 (2) Purpose (same diagram / table --- side view)
  • Page 150 Page: 61 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures Dial Parameters Settings Table Item Specifications Default Redial tries Switches on the re-dial times to meet the regulations of the installed country. 0 to 10 tries (in one-try steps) 1 to 5 tries for FRE.
  • Page 151 Page: 62 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9.10 Off-line Tests (1) Purpose Activate self-diagnosis which includes: Print test CPU-ROM version printing CPU-RAM check PROG version printing LANGUAGE version printing DEFAULT version printing RAM check RAM check (memory board: optional)
  • Page 152 Self-Diagnosis Print Test (Example)
  • Page 153 *1 marked item is shown for condition of all RAM except EXCEED RAM. *2 marked item is shown to SRAM for EXCEED. *3 marked items are option.
  • Page 154 Page: 63 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.9.11 On-line Tests 1. Transmission (1) Load documents (2) Make sure that The loaded documents are fed in automatically. The STD and NORMAL lamps light. The display shows SELECT LOCATION.
  • Page 156 Typical Reception Flow...
  • Page 159 Page: 64 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2.10 Installation of Optional Units (1) Items Memory board PC interface board Telephone handset Second paper cassette unit (2) Procedure Turn the facsimile power switch OFF and remove the AC power cord.
  • Page 160 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 1. Installation of the Memory Board In OKIFAX 5250/5400, MEM, 1, 1.5, 2 o4 MB memory board can be mounted on the connector CN13 of E17 board. Remove Rear Cover. Remove the rear cover by removing the two screws S1 and S2 .
  • Page 161 Page: 66 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 2. Installation of CTR (PC interface) board (OF5400 only) Remove Rear Cover. Remove the rear cover by removing the two screws S1 and S2 . Install CTR board. First, install CTR board on to the connector CN12, CN17 of the main control board, and then tighten the two screws...
  • Page 162 a) Insert the tip of a cutter or Nipper between the mold of Rear Cover and cut out it. Note: Be careful not to rotate the cutter or Nipper, since this can cause scratching on the Rear Cover. b) Grasp the mold of Rear cover, and rotate it up and down until you can able to easily remove it.
  • Page 163 Page: 67 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 3. Installation of an Optional Telephone Set (1) After having taken out the telephone set, telephone handset and curled cord from the carton box, connect them as shown. (2) After installing the connection cable to the telephone set, extend the connection cable.
  • Page 164 (4) Install the telephone assembly on the facsimile transceiver unit. In this case, cram the telephone assembly into the position shown by lifting the facsimile transceiver unit slightly. When the second paper tray is mounted on the facsimile transceiver unit, install the telephone assembly in the position shown. (5) Connect the terminal on the other side of the connection cable formed on the rear side of the equipment (TEL1), to the telephone set.
  • Page 166 Page: 68 Service Guide OKIFAX 5250/5400 Chapter 2 Installation Procedures 4. Second Paper Cassette Unit This item explains how to install the Second Paper Cassette Unit option. Second Paper Cassette Unit Installation 1. Turn the facsimile power switch off and remove the AC power cord.
  • Page 167 4. Peel off the tape attached on the Second Paper Cassette Unit. 5. Install the Second Paper Cassette. Approximately 500 sheets of recording paper (20-Ib bond) can be loaded. 6. Reconnect the power cord to the wall and the facsimile, and turn the facsimile power on.
  • Page 169 Page: 69 Service Guide OKIFAX 5250/5400 Chapter 3 Brief Technical Description 3.1 Fundamentals of the Electro-Photographic Process The electro-photographic process involves six sub-processes: (1) Charging (2) Exposure (3) Development (4) Transfer (5) Fusing (6) Cleaning The outline of each process is explained below.
  • Page 170 4 Transfer The recording paper is placed over the Image drum surface and a positive charge, opposite in polarity to the toner, is applied to the reverse side of the paper from the transfer roller. The toner is attracted by the positive charge and is transferred to the paper.
  • Page 171 Page: 70 Service Guide OKIFAX 5250/5400 Chapter 3 Brief Technical Description Electric Photographic Process Flow...
  • Page 172 Page: 71 Service Guide OKIFAX 5250/5400 Chapter 3 Brief Technical Description 3.2 Actual Electo-photographic Process The electro-photographic process consists of six essential processes. * Process: 1 : Charging 2 : Exposure 3 : Developing 4 : Transfer 5 : Fusing...
  • Page 173 Page: 72 Service Guide OKIFAX 5250/5400 Chapter 3 Brief Technical Description 3.3 Boards and Units / Block Diagram The three boards, [Memory board (option), Telephone interface board (option), PC interface board (option)] and three units constitute the facsimile machine unit.
  • Page 174 Page: 73 Service Guide OKIFAX 5250/5400 Chapter 3 Brief Technical Description Block Diagram...
  • Page 175 Page: 74 Service Guide OKIFAX 5250/5400 Chapter 3 Brief Technical Description 3.4 Overall Dimension and Mechanical Structure...
  • Page 177 Page: 75 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.1 General This chapter explains the procedures for replacement of assemblies and units in the field. 4.1.1 Precautions for Parts Replacement...
  • Page 178 Page: 76 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.1.1 Precautions for Parts Replacement (1) Before starting disassembly and reassembly, always turn the AC power switch OFF, and pull out the AC plug. Note: Unplug the AC power cord from the wall outlet first and then from the facsimile.
  • Page 179 Page: 77 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.2 Tools The tools (shown below) are required for the replacement of parts.
  • Page 180 Page: 78 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.3 How to Disassemble and Reassemble This section explains how to disassemble and reassemble the fax. The Disassembly Procedure Flowcharts provide an overview of the procedures. The detailed disassembly procedure is explained from sub-section 4.3.1 to 4.3.8.
  • Page 181 Page: 79 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly Disassembly Procedure Flow 4.1 (1of 2)
  • Page 184 Page: 80 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly Disassembly Procedure Flow (Figure 4.2) 2 of 2...
  • Page 187 Page: 81 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.3.1 LED Print Head...
  • Page 190 Page: 82 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.3.2 Image Drum, Covers (Rear, NCU, Main) Separation Plate, Boards (NCU, Modem)
  • Page 195 Page: 83 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.3.3 Control Panel Assembly, Paper Guide (U) Assembly...
  • Page 200 Page: 84 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.3.4 Sub-roller, ADF Roller Assembly, Pinch Roller, Contact Image Sensor, Document Detectors (PC1 and PC2)
  • Page 205 Page: 85 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.3.5 Motors (Resist, Drum), Assemblies (Release Guide, Manual Guide) Stacker Cover, Fusing Unit...
  • Page 208 Page: 86 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.3.6 Lower Base, Motor Assembly, Back-up Roller, Transfer Roller...
  • Page 211 Page: 87 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.3.7 Resist Roller, Hopping Roller, Sensor Plate...
  • Page 214 Page: 88 Service Guide OKIFAX 5250/5400 Chapter 4 Disassembly 4.3.8 E17 Board, Power Supply Unit, Contact Assembly, Transformer, Sub-PSU...
  • Page 217 Page: 89 Service Guide OKIFAX 5250/5400 Chapter 5 Adjustments 5.1 Setting of LED Print Head Drive Time Adjustment point: Technical Function No. 27. * To bring the LCD up to Technical Function, press SELECT FUNCTION key once, COPY key twice and "2" key (In case of no message in memory).
  • Page 218 Page: 90 Service Guide OKIFAX 5250/5400 Chapter 5 Adjustments 5.2 Confirmation Items The clock frequency and power voltage of the machine are not possible to adjust in the field. However, their measurement procedures are described here for confirmation of clock frequency and each voltage.
  • Page 219 Page: 91 Service Guide OKIFAX 5250/5400 Chapter 5 Adjustments 5.3 Measurement 1) Turn AC power OFF. 2) Carry out the disassembly procedure up to Main Cover and Scanner Unit removal. (Refer to the Mechanical Disassembly and Reassembly in Chapter 4-2.) 3) Connect extension cables to the M17 board.
  • Page 220 Page: 92 Service Guide OKIFAX 5250/5400 Chapter 5 Adjustments Measurement Points on M17 Board...
  • Page 221 Page: 93 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.1 Consumables Replacement The user (or service personnel) is required to replace the following items as consumable parts. User Replaceable No. Part name Expected Use Before Replacement Item No. in Ref.
  • Page 222 Page: 94 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance Service Technician Replaceable No. Part name Expected Use Before Replacement Item No. in Ref. Diagram Fuser Unit 180,000 sheets Separation Rubber The Separation Rubber will not require replacement for at least 30,000 documents fed.
  • Page 223 Page: 95 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance Replaceable Items Diagram...
  • Page 224 Page: 96 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance Others - Reliability No. Item Specifications Document feeder Jam occurrence and misfeeds in the automatic document feeder will be less than one in 500 operations for all specified documents.
  • Page 225 Page: 97 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.2 Routine Inspection Basically, the routine inspection of the following items is performed about half-yearly (or every one year) after the machine is installed. The description of routine inspection is shown in the maintenance procedures.
  • Page 226 Page: 98 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance Routine Inspection Part name Maintenance Procedure Item No. in Ref. Diagram Scan Roller Clean with wet cloth. Feed Rollers No. 1 and No. 2 Clean with wet cloth. If the surface of these rollers...
  • Page 227 Page: 99 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance Preventative Maintenance Diagram...
  • Page 228 Page: 100 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.3 Printer Counter Display/Clear (User) 1. Purpose A user can clear the image drum counter and also check some of the other counters (such as the print counter, scan counter) by using the <--- key or --->...
  • Page 229 Note: Clear Operation After having cleared the drum counter, warning message will disappear.
  • Page 230 Page: 101 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.4 Printer Counter Display/Clear (Service) 1. Purpose The service personnel can clear and check the following counters. Image Drum Toner Image Drum (Total) Print Scan Note: DRUM (T) count is used to display the total in-use life of the machine. This counter cannot be cleared.
  • Page 232 Page: 102 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.5 Self-Diagnosis Test...
  • Page 234 Page: 103 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance Self-Diagnosis Test Sample...
  • Page 237 Page: 104 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.6 Sensor Calibration Test...
  • Page 238 NOTE: After adjustment of levels, check the copy quality by copying test charts or documents.
  • Page 239 Page: 105 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.7 LED Test...
  • Page 241 Page: 106 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.8 Tone Send Test...
  • Page 242 Page: 107 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.9 High-speed Modem Send Test 1. Purpose To check the telephone line quality in combination with a remote station programmed to the high-speed modem receive test mode. 2. Procedure...
  • Page 243 Page: 108 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance High-speed Modem Send and Receive Test Diagram...
  • Page 245 Page: 109 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.10 High-speed Modem Receive Test 1. Purpose To check the telephone line quality in combination with a remote station programmed to the high-speed modem send test mode. 2. Procedure...
  • Page 246 Page: 110 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.11 MF Send Test 1. Purpose To send the multi-frequencies of tone dialing to the line. 2. Procedure...
  • Page 248 Page: 111 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.12 Tone (TEL/FAX)
  • Page 249 Page: 112 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.13 Protocol Data Dump...
  • Page 250 Page: 113 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance Dump data description 1) Data sample...
  • Page 253 Page: 114 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance Data Analysis The printed out data permits to analyze G3 facsimile communication protocol signals between two facsimile machines. Below is the result of an analysis on the printed data (referring to the Sample Protocol Data Dump).
  • Page 255 Page: 115 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance FCF - Facsimile Control Field Conversion Table This table shows all Facsimile Control Field (FCF) signals which are needed to analyze the printed out protocol dump data. Some signals have two different hexadecimal codes in accordance with the calling party or called party.
  • Page 256 Page: 116 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.14 System Reset...
  • Page 259 Page: 117 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance 6.15 Service code 1) The service code is printed on the Activity Report to document the result of each communication. 2) The activity report prints the service code "0000", when a communication terminates normally.
  • Page 260 Page: 118 Service Guide OKIFAX 5250/5400 Chapter 6 Cleaning and Maintenance Service Codes Table Code Description 0000 Successful end of communication 1080 STOP key pressed while calling a remote fax 10A2 Busy tone detected 14C0 Dial tone not detected 14C1...
  • Page 261 9089 Document length has exceeded its maximum limit 908E Recording paper jam 9090 Received DCN 90B1 Picture memory hash error 90C1 Document removed prior to transmission 90C6 Normal or error-free lines not received for 13 seconds 90C7 Error frame protocol received 90D4 Hardware error in transmission system (response of modem not detected) 90D5...
  • Page 262 Page: 119 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.1 Overview This chapter contains: (A) Troubleshooting flow charts related to general operations (B) Troubleshooting flow charts by test operations (C) Troubleshooting flow charts placing an emphasis on mechanical portions Section No.
  • Page 263 Page: 120 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.1 Overall Troubleshooting Flow Chart...
  • Page 266 Page: 121 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.2 No LCD Operation...
  • Page 269 Page: 122 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.3 Alarm LED On...
  • Page 272 Page: 123 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.4 Printing Test Failure...
  • Page 273 Page: 124 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.5 No Local Copy...
  • Page 276 Page: 125 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.6 Auto Dial Failure...
  • Page 279 Page: 126 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.7 Transmission Problem This section explains how to localize the cause of problems occurred after completion of connection with a remote station.
  • Page 280 Description: Protective tone is 1700 Hz/200 ms. This signal is added to training signal to protect the training signal against echo as follows.
  • Page 281 Page: 127 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.8 Auto Reception Failure...
  • Page 284 Page: 128 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.9 Reception Problem This section explains how to localize the cause of problems occurred after completion of connection with a remote station.
  • Page 286 Page: 129 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.10 Sensor Calibration Test...
  • Page 287 Page: 130 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.11 LED Test...
  • Page 290 Page: 131 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.12 Tone Send Test...
  • Page 293 Page: 132 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.13 High-speed Modem Test...
  • Page 296 Page: 133 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.14 MF Send Test...
  • Page 298 Page: 134 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.15 Tone (TEL/FAX) Send Test...
  • Page 301 Page: 135 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.16 No Acoustic Line Monitor There are two source routes of acoustic line monitor: (a) General communication signal (b) DP pulse signal...
  • Page 303 Page: 136 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.17 Power Supply Unit...
  • Page 306 Action Items:...
  • Page 311 Page: 137 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.18 No Document Feeding Note: This section places an emphasis on troubleshooting of mechanical portions. Therefore, it is recommended to replace the E17 Board first and, then if not solved, follow this flow chart.
  • Page 313 Page: 138 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.19 Multiple Document Feeding...
  • Page 314 Page: 139 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.20 Document Skew...
  • Page 317 Page: 140 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.21 Document Jam...
  • Page 320 Page: 141 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.22 Printer Unit 7.22.1 Precautions 7.22.2 Troubleshooting flow Charts of Printer Unit 7.22.3 Image Problems Table...
  • Page 321 Page: 142 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.22.1 Precautions 1. Points to check before correcting image troubles (1) Is the printer being run in proper ambient conditions? (2) Have the supplies (toner) and the routine replacement part (EP unit) been replaced properly?
  • Page 322 Page: 143 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.22.2 Troubleshooting Flow Charts of Printer Unit Overall Troubleshooting Flowchart 1: Top Cover is Open 2: Replace Image Drum Message 3: Engine Controller Error 4: Fan Motor Rotation Error 5: Fuser Unit Thermal Error...
  • Page 323 Page: 144 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting Overall Troubleshooting Flowchart LCD Message / Troubleshooting Table Category LCD message display Situation Trouble- shooting flow chart number Cover open 14:14 [FAX] The cover (cover-top) is open. COVER OPEN Image drum alarm...
  • Page 324 Page: 145 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 1: Top Cover is Open...
  • Page 325 Page: 146 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 2: Replace Image Drum Message...
  • Page 326 Page: 147 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 3: Engine Controller Error...
  • Page 327 Page: 148 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 4: Fan Motor Rotation Error...
  • Page 328 Page: 149 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 5: Fuser Unit Thermal Error...
  • Page 329 Page: 150 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 6: Paper Jams...
  • Page 331 Page: 151 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7: No Paper Tray or No Paper...
  • Page 332 Page: 152 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting Action Items (Printer Unit-LCD Message) Table Action Check E17 Board. Check POWER SUPPLY UNIT cover open switch cover open switch connection. CheckE17 Board. Return to Section 7.1 Replace the image drum.
  • Page 333 Page: 153 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 7.22.3 Image Problems Table Abnormal Symptom Reference Troubleshooting Figure Flow Chart No. Light or blurred images Fig. A Smeared output background Fig. B Blank output Fig. C Vertical black stripes Fig. D Evenly spaced, repeating marks Fig.
  • Page 334 Page: 154 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting Sample Image Problems...
  • Page 335 Page: 155 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 8: Light or Blurred Output...
  • Page 336 Page: 156 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 9: Smeared Background on Output...
  • Page 337 Page: 157 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 10: Blank Output...
  • Page 338 Page: 158 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 11: Vertical Black Stripes on Output...
  • Page 339 Page: 159 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 12: Evenly Spaced Marks on Output...
  • Page 341 Page: 160 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 13: Missing Print on Output...
  • Page 342 Page: 161 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 14: Vertical White Stripes on Output...
  • Page 344 Page: 162 Service Guide OKIFAX 5250/5400 Chapter 7 Troubleshooting 15: Poor Fusing...
  • Page 345 Page: 163 Service Guide OKIFAX 5250/5400 Chapter 8 Dipswitch Settings 8.1 General Information The OKIFAX 5250 and OKIFAX 5400 do not have any dipswitches.
  • Page 346 Page: 164 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A1.1 Unit Configuration and Block Diagram The unit configuration of the OKIFAX 5250 / 5400 is as follows: Diagram (1) Main control board...
  • Page 347 (2) Modem board (MODEM): OKIFAX 5400 only (3) Network control unit (UNC) (4) PC interface board (CTR): OKIFAX 5400 option only (5) Memory board (MEM): option (6) Power supply unit (1VP: 120V, 2VP: 230V) (7) Power supply unit (SUB POW) (8) Operation panel board (05WH) (9) Optional board Telephone interface board (TEL)
  • Page 348 Page: 165 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram...
  • Page 351 Page: 166 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram Abbreviations Analog-to-digital converter Amplifier BATT Battery Connector number i Central processing unit D-MOTOR Drum motor Motor drive DRAM Dynamic random-access memory EXSEED Image processing gate array Fan motor...
  • Page 352 Page: 167 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A1.2 Function of Each Unit The section describes the principal functions of the individual units of the fax machines electrical sections. The block diagram is shown in Section A1.1 (1) Main Control Board (E17)
  • Page 353 Detection of single-frequency tonal signals Generation of dual time multiple-frequency signals for tone dialing (2) Operation panel unit: 05W board Supervision of switches on operation panel Control of LEDs on operation panel Control of LCD on operation panel LED : Light-emitting diode LCD : Liquid crystal display (3) NCU Board (PCB) Conversion of receive data and receive signals to internal signal level...
  • Page 354 Second paper cassette unit MOS-CPU Motor control...
  • Page 355 Page: 168 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A2.1 Signal Flow Explanation (1) Copy Mode (2) G3 Send Mode (3) G3 Receive Mode (4) 300bps Send Mode (5) 300bps Receive Mode (6) Report Printing (7) Memory Transmission (8) Memory Reception...
  • Page 356 Page: 169 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions (1) Copy Mode The Copy Picture Signal Diagram shows the picture signal route in local copy mode. One-line picture data is transferred to A/D converter (analog/digital) via operational amplifier from the scanning unit (CIS: contact image sensor) as an analog data.
  • Page 357 Page: 170 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Copy Picture Signal...
  • Page 360 Page: 171 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions (2) G3 Send Mode The G3 Send Picture Signal Diagram shows the G3 send picture signal route. In the G3 mode, the data transfer route from the scan unit up to the DRAM is the same as in the copy mode described in (1).
  • Page 361 Page: 172 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions G3 Send Pciture Signal...
  • Page 364 Page: 173 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions (3) G3 Receive Mode The G3 Receive Picture Signal Diagram shows the G3 receive picture signal route. In the G3 mode, the high-speed picture signal arriving from the telephone line at L1 and L2 of NCU passes through the transformer T1 and the amplifier and is input to the MODEM as "R"...
  • Page 365 Page: 174 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions G3 Receive Picture Signal...
  • Page 368 Page: 175 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions (4) 300 bps Send Mode The 300 bps Second Mode Diagram shows the 300 bps send protocol signal route. In G3 communication, this is the route of the procedural control signals (pre-message, post-message phases etc.) at 300bps.
  • Page 369 Page: 176 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 300 bps Send Signal...
  • Page 372 Page: 177 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions (5) 300 bps Receive Mode The 300 bps Receive Mode Diagram shows the 300 bps receive protocol signal route. In G3 communication, this is the route of the procedural control signals (pre-message, post-message phases etc.) at 300bps.
  • Page 373 Page: 178 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 300 bps Receive Signal...
  • Page 376 Page: 179 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions (6) Report Printing The Report print Signal Diagram shows the Report Print Signal route. This signal route describes the printing route of character data used to print Activity Report, Message Confirmation Report, etc.
  • Page 377 Page: 180 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Report Printing Signal...
  • Page 380 Page: 181 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions (7) Memory Transmission This signal route describes the memory transmission used in broadcast mode, delayed broadcast mode, etc. The stored encoded data undergoes buffering, passes through CPU, MODEM and NCU and then sent out to the...
  • Page 381 Page: 182 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions (8) Memory Reception This signal route describes the memory reception used in no-paper mode, no-toner reception, confidential mode, etc.
  • Page 382 Page: 183 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1 Main Control Board (E17) Circuit Diagrams A.3.1.1 E-17 CPU Circuit Diagram A3.1.2 E-17 - FLS, MASK, and Real Time Clock Circuit Diagram A3.1.3 E-17 - Audio Monitor Circuit Diagram A3.1.4 E-17 - CIS Circuit Diagram...
  • Page 383 Page: 184 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.1 E-17 - CPU Circuit Diagram 1. Block diagram The circuit diagram consists of a CPU, crystal oscillator circuit and reset signal generator. Refer to the Related Signals of CPU Diagram for more information.
  • Page 384 Page: 185 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Related Signals of CPU Diagram...
  • Page 386 Page: 186 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.2 E17 - FLS, MASK and Real Time Clock Circuit Diagram 1. Block diagram The circuit diagram consists of Flash memory, Mask ROM, IC3 (Real time clock IC) and Back up battery circuit.
  • Page 387 Page: 187 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of FLS, MASK and Real Time Clock...
  • Page 388 Page: 188 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.3 E17 - Audio Monitor Circuit Diagram 1. Block diagram The audio monitor circuit consists of IC11 (analog switch IC) and IC5 (amplifier) generates the following audio monitor. Line monitoring Buzzer signals Figure A3.1.3 shows the block diagram of audio monitor circuit.
  • Page 389 Page: 189 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of Audio Monitor Circuit...
  • Page 390 Page: 190 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.4 E17 - CIS (contact image sensor) Block Diagram 1. Block diagram The circuit diagram shown on page 4/16 consists of the following function: IC6 (A/D converter) and amplifier 30 V/24 V conversion circuit Connector CN10 that provides an interface between E17 board and CIS (contact image sensor).
  • Page 391 Page: 191 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of CIS (contact image sensor)
  • Page 392 Page: 192 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.5 IEXSEED300 Diagram 1. Block diagram The circuit diagram shown consists of the IEXSEED300 (image processing LSI) of IC20 and SRAM. Refer to the Related Signals and Block Diagram of CIS for more information.
  • Page 393 Page: 193 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Related Signals of IEXSEED300...
  • Page 394 Page: 194 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.6 E17 - Modem Diagram 1. Block diagram The circuit diagram shown on page 7/16 consists of connector CN15 that provides an interface between E17 board and the Modem board S34, V34 or T34 (option).
  • Page 395 Page: 195 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Related Signals of Modem...
  • Page 396 Page: 196 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.7 E17 - NCU, OPE, and PC1/PC2 Circuit Diagram 1. Block diagram The circuit diagram shown consists of the following connectors: Connector CN6 that provides an interface between M17 board and NCU board.
  • Page 397 S : Send signal (picture data/protocol/tonal signals/PB tone etc.) R : Received signal (picture data/protocol/tonal signals etc.) OPE interface signals TXDOPE : This signal transmits sequentially the contents of each data of TXD (LED on/off information, etc.) to OPE in serial data from CPU. RXDOPE : This signal transmits sequentially the contents of each data of RXD (key code information, etc.) to CPU in serial data from OPE.
  • Page 398 Page: 197 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Interface between E17 Board and NCU Board...
  • Page 399 Page: 198 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Interface between E17 Board and OPE...
  • Page 400 Page: 199 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Related Signals of PC1/PC2...
  • Page 401 Page: 200 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.8 E17 - LED Circuit Diagram 1. Block diagram The circuit diagram consists of connector CN2 that provides an interface between E17 board and LED print head. For more information, refer to the Related Signals and Block Diagram of LED Print head.
  • Page 402 Page: 201 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Related Signals and Block Diagaram of LED Head...
  • Page 403 Page: 202 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.9 E17 - Send Motor Circuit Diagram 1. Block diagram The circuit diagram consists of the following functions and connectors: IC21 (Send motor drive) Connector CN5 that provides an interface between M17 board and the send motor.
  • Page 404 Page: 203 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Related Signals of Send Motor...
  • Page 405 Page: 204 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.10 E17 - Drum/Resist Motor Circuit Diagram 1. Block diagram The circuit diagram consists of the following functions and connectors: IC9 (Drum motor driver) IC22 (Resist motor driver) Connector CN3 that provides an interface between E17 board and the resist motor.
  • Page 406 Page: 205 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Related Signals of Drum/Resist Motor...
  • Page 407 Page: 206 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.11 E17 - Fan Motor Circuit Diagram 1. Block diagram The circuit diagram consists of the following connectors: Connector CN11 that provides an interface between E17 board and the fan motor.
  • Page 408 Page: 207 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Related Signals of Fan Motor...
  • Page 409 Page: 208 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Interface between E17 Board and 2'nd Tray < same diagram -- different size >...
  • Page 411 Page: 209 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.12 E17 - Main Power Supply Circuit Diagram 1. Block diagram The circuit diagram consists of the following connector: Connector CN1 provides an interface between E17 board and main power supply unit.
  • Page 412 Page: 210 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Sensor Functions Sensor Type Sensor Name Function PSIN-N Inlet sensor This photosensor is positioned before the resist roller to detect PSIN2-N Inlet sensor 2 whether the paper has entered into the printer section.
  • Page 413 Page: 211 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Sensors and Switch Control...
  • Page 414 Page: 212 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Fuser Unit Temperature Control 2) Fuser unit temperature control The heater in the fuser unit is controlled by the thermister, IOGA3 and CPU to keep the heater roller surface within a prescribed temperature range.
  • Page 416 Page: 213 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions High/Medium Voltage Control 3) High-voltage and medium-voltage control High voltages are activated by CPU and generated by the high-voltage circuit inside the power supply unit. The CH (charge) voltage of about -1.35 kV is used for the charge roller. The TR1/TR2 (transfer) voltage of about +3.5 kV/-0.75 kV is used for the transfer roller.
  • Page 417 Page: 214 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.13 E17 - Optional Memory and CTR Circuit Diagram 1. Block diagram The circuit diagram consists of the following connector: Connector CN13 that provides an interface between M17 board and optional memory board.
  • Page 418 Page: 215 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Interface: E17 Board to Optional Memory Board Diagram...
  • Page 419 Page: 216 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Interface E17 Board to CR Board (PC interface unit) Diagram...
  • Page 420 Page: 217 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.1.14 E17 DRAM Diagram 1. Block diagram The circuit diagram consists of the following functions and connectors: RAM3 to RAM5 For more information, refer to the Block Diagram of DRAM.
  • Page 421 Page: 218 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of DRAM...
  • Page 422 Page: 219 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.2 OPE (05W) Circuit Diagram 1. Block diagram Refer to the Block Diagram of OPE (05W). The O5WH (operation unit) circuit consists of the following blocks: 1) IC1 (one chip MOS-CPU)
  • Page 423 Page: 220 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of OPE (operation unit) Diagram...
  • Page 424 Page: 221 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.3 Power Supply Unit A3.3.1 Circuit Diagram for 1VP/2VP (1 of 2) A3.3.2 Circuit Diagram for 1VP/2VP (2 of 2)
  • Page 425 Chapter A Board Descriptions A3.3.1 Circuit Diagram for 1VP/2VP (1/2) IMPORTANT: Oki Data Corporation recommends that maintenance of the Power supply unit (1VP/2VP board) be performed by replacement of the whole power supply unit, not by replacement of components. Therefore, 1) circuit descriptions in this section are for reference.
  • Page 426 Page: 223 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 1. Low-voltage power supply circuit This circuit generates the following voltages. Output Voltage Output Voltage +5 V Logic circuit supply voltage (IC LSI), and high-voltage source voltage, etc. +8 V...
  • Page 427 Page: 224 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 2. Input ratings Voltage: AC 120 V +6%, -15% (AC 102 V to 127 V) AC 230 V +15%,-14% (AC 198 V to 264 V) Frequency: 50/Hz/60Hz +/-2%...
  • Page 428 Page: 225 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 3. Output ratings Transformer type B Pin No. Rated Rated Current Voltage Output Output Voltage Current Range Range Ripple Noise CN3-B11-B13 1.8 A 0.2 to 4.5 A 5 V +/-4%...
  • Page 429 Page: 226 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 4: Block Diagram Refer to the Block Diagram of 1VP (120V)/2VP (230V). Note: The differences between 1VP (AC120V) and 2VP (AC230V) board are shown in the following table. Symbol 1VP Board...
  • Page 430 Page: 227 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of PWU (Power Supply Unit)
  • Page 433 Page: 228 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5. General functional description 5-1 General 5-2 Circuit description 5-3 Low-voltage section 5-4 Protection circuits 5-5 Cover open circuit 5-6 High Voltage Section 5-7 Photosensors...
  • Page 434 Page: 229 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-1 General The power supply unit consists mainly of AC transformer and a power PCB (1VP board for AC120V/2VP board for AC230V). A block diagram of the power supply unit is shown in Figure A3.6.1 The power PCB is composed of five main circuits: AC input section, heater control section, low-voltage section, high-voltage section and protection circuit.
  • Page 435 Page: 230 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-2 Circuit Description 5-2-1 AC input section 5-2-2 Heater control circuit...
  • Page 436 Page: 231 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-2-1 AC input section 1) AC commercial power is supplied to line filter circuit through the AC inlet, power switch (SW1) and the fuse (F1). Fuse F1 is used for protecting the heater circuit.
  • Page 437 Page: 232 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-2-2 Heater control circuit 1) The AC power divided from the AC input section passes through L2 for noise elimination and is fed to the heater via D1 (operating as a switch) from the power PCB.
  • Page 438 Page: 233 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-3 Low-voltage section 5-3-1 +30 V circuit 5-3-2 +/- 8 V circuit 5-3-3 +5 V circuit...
  • Page 439 Page: 234 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-3-1 +30 V circuit 1) The +30 V circuit provides +30 V output by rectifying the corresponding output of transformer T1 by a rectifier diode DS1 and smoothing the rectified signal by capacitor C7.
  • Page 440 Page: 235 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-3-2 +/- 8 V circuit 1) The +/- 8 V circuit provides +8 V and -8 V outputs by rectifying the corresponding output of transformer T1 by rectifier diodes D10 and D11 and smoothing the rectified signals by capacitors C13 and C14.
  • Page 441 Page: 236 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-3-3 +5 V circuit 1) +5 V circuit provides +5 V output by lowering +30 V output by means of DC-DC converter circuit. 2) IC1 is a control IC of frequency fixed type (operating at about 30 kHz in present power supply unit) 3) Q1 is a power transistor, D7 is a flywheel diode, and L3 , C10 and C20 compose a smoothing circuit.
  • Page 442 Page: 237 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-4 Protection circuit 1) The protection circuit includes fuse F3 for +30 V and +5 V overcurrent protection circuit. 2) If an overvoltage is applied to the +5 V circuit, D8, R9 and D6 operate to short-circuit the +30 V circuit for half-wave cycle and fuse F3 will blow.
  • Page 443 Page: 238 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-5 Cover open circuit 1) The cover open circuit consists of SW2. When the stacker cover is opened, the cover open microswitch (SW2) on the 1VP/2VP board is turned off to cut the supply of H5V to the high-voltage power supply circuit. As a result all high-voltage outputs are interrupted.
  • Page 444 Page: 239 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.3.2 1VP (for 120V)/2VP (for 230V) Circuit Diagram (2/2) This circuit consists of photo-sensors and high voltage generation unit. Note: If the high-voltage unit inside the 1VP/2VP circuit board is replaced, the output voltage and current output from the terminals must be checked and adjusted.
  • Page 445 Page: 240 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-6 High-voltage Section 5-6-1 Functional overview 5-6-2 SB2, DB1, DB2 and CB 5-6-3 TR1 and TR2 5-6-4 CH...
  • Page 446 Page: 241 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-6-1 Functional overview The high-voltage outputs consist of TR1 (3.5 kV), TR2 (-0.75 kV), DB1 (+300 V), DB2 (-300 V), SB2 (-450V), CB (+400 V) and CH (-1.35 kV) and are obtained as follows. The control signal obtained from IOGA of E17 board is applied to High-voltage power supply circuit.
  • Page 447 Page: 242 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-6-2 SB2, DB1, DB2 and CB 1) These four high-voltage outputs are obtained from the flyback voltage of Q10. 2) The positive and negative voltages of DB1 and DB2 are obtained by switching the charging direction under the triac and thyristor.
  • Page 448 Page: 243 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-6-3 TR1 and TR2 1) The TR1 high-voltage is obtained by rectifying the secondary output of Q17 switching circuit by a voltage-doubler rectifier. 2) TR1 output circuit has both constant current (hereinafter called CC) and constant voltage (hereinafter called CV) modes.
  • Page 449 Page: 244 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-6-4 CH 1) The CH output voltage is stabilized by keeping the primary flyback voltage obtained by switching operation of Q16 at a constant voltage by D76 and D82.
  • Page 450 Page: 245 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions 5-7 Photosensors The photosensors mounted on this circuit board/sensor board supervise the paper running state during printing. These six photosensors are used in this printer as listed below. All of their outputs enter IOGA for referring to and processing by the CPU.
  • Page 451 Page: 246 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.4 UNC, WN5, FN5 and DN5 Circuit Diagram UNC Circuit Diagram WN5 Circuit Diagram FN5 Circuit Diagram DN5 Circuit Diagram...
  • Page 452 Page: 247 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions UNC (NCU) Circuit Diagram 1. Block diagram Refer to the Block Diagram of UNC (NCU) Circuit Diagram. 2. General functions of this circuit are as follows: 1) Generates and detects signals to be exchanged with a telephone exchange or network in Phases A and E defined by ITU T.30.
  • Page 453 This circuit selectively switches the line between the telephone or facsimile. 8 SR (RL2) This circuit connects the line with the telephone. During facsimile transmission, it disconnects the telephone. 11 PP (RL6) If this circuits detects MF or CNG tones without seizuring a line, it sets a proper receiving sensitivity. 12 DP (RL3) This circuit generates pulse dials.
  • Page 454 Page: 248 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of UNC...
  • Page 457 Page: 249 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions WN5 Circuit Diagram 1 Lightning arresters (AR1, 2) The nominal operating voltage is 500 V. When connecting the ground of the arrestor to the chassis, tighten ARG on the PCB with a screw. At this time, the PCB is grounded through the power cable.
  • Page 458 This circuit processes send/receive signals required for facsimile transmission, dial tone receive signals required for automatic dialing, and MF tone send and remote receive signals. It separates between the line and equipment in terms of DC and also keeps a balance between the line and the ground. 16 Off-hook detectors (IC2, RL7) These circuits detect the off-hook state of the telephone connected to the TEL1, TEL2, through LINE terminal.
  • Page 459 Page: 250 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of WN5...
  • Page 461 Page: 251 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions FN5 Circuit Diagram 1 Lightning arresters (AR1, 2) The nominal operating voltage is 500 V. When connecting the ground of the arrestor to the chassis, tighten ARG on the PCB with a screw. At this time, the PCB is grounded through the power cable.
  • Page 462 These circuits detect the off-hook state of the telephone connected to the TEL1, TEL2, through LINE terminals. IC2 uses a high detection sensitivity than of RL7. In TEL/FAX mode, the higher sensitive IC2 is used to detect the off-hook state of the telephone while the main equipment is hunting a line. Usually, IC2 is short-circuited by the CML relay (7) in the standby state and RL7 is used for off-hook detection.
  • Page 463 Page: 252 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of FN5...
  • Page 466 Page: 253 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions DN5 Circuit Diagram 1 Lightning arresters (AR1, 2) The nominal operating voltage is 500 V. When connecting the ground of the arrestor to the chassis, tighten ARG on the PCB with a screw. At this time, the PCB is grounded through the power cable.
  • Page 467 automatic dialing, and MF tone send and remote receive signals. It separates between the line and equipment in terms of DC and also keeps a balance between the line and the ground. 16 Off-hook detectors (IC2, RL7) These circuits detect the off-hook state of the telephone connected to the TEL1, TEL2, through LINE terminals. IC2 uses a high detection sensitivity than of RL7.
  • Page 468 Page: 254 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of DN5...
  • Page 471 Page: 255 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.5 TELU, TEL-W2, TEL-W1, and TEL-W2F Circuit Diagram (option) TELU TEL-W2 TEL-W1 TEL-W2F...
  • Page 472 Page: 256 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions TELU Circuit Diagram (option) The TELU board is the control board of the telephone set when the optional telephone assembly is installed on the facsimile transceiver. 1. Block diagram Refer to the Block Diagram of the TELU circuit diagram.
  • Page 473 amplification factor and output to the telephone line via UNC, Hook switch and DB2 (rectifier). Receive signal route Receive signal from the telephone line enters Speech IC via UNC, Hook switch and DB2 and is output to pin 2 & 3 of the speaker of the handset.
  • Page 474 Page: 257 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of TEL-U (option)
  • Page 477 Page: 258 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions TEL-W2 Circuit Diagram Refer to Block Diagram TEL-W2 1) Speech IC General functions of the speech IC are as follows: Basic speech functions included. Separate receive pre-amplifier with signal output terminal Separate receive power amplifier input terminal, cause it is possible to mixing input.
  • Page 478 SW2-3 is set to ON, the impedance is set to 600 W's series. 8) AGC (automatic gain control) AGC is function for adjusting the sending and receiving levels automatically in accordance with the line current values, so that the optimal communication level is automatically set. The circuit section to determine the AGC characteristic is formed by the group of resistors R41, R43 and R44 connected to the AGC terminal of the speech IC.
  • Page 479 Page: 259 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of TEL-W2...
  • Page 482 Page: 260 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions TEL-W1 Circuit Diagram Refer to Block Diagram of TEL-W1. 1) Speech IC General functions of the speech IC are as follows: Basic speech functions included. Separate receive pre-amplifier with signal output terminal Separate receive power amplifier input terminal.
  • Page 483 6) Side-Tone Adjustment The side-tone adjustment is performed by the C-R networks corresponding to the individual countries. For adjusting the side tone, select the corresponding C-R network by the designated DIP switch and adjust the STMR value to the specified value by the values of capacitors and resistors. The dip-switch set to ON corresponds to the country as shown in the table.
  • Page 484 Page: 261 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of TEL-W1...
  • Page 487 Page: 262 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions TEL-W2F Circuit Diagram Refer to Block Diagram of TEL-W2F. 1) Speech IC General functions of the speech IC are as follows: Basic speech functions included. Separate receive pre-amplifier with signal output terminal.
  • Page 488 (2) Return loss (3) Sending level (4) Receiving level (5) Side tone level...
  • Page 489 Page: 263 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of TEL-W2F...
  • Page 492 Page: 264 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.7 MEMO (memory) Circuit Diagram (option) By mounting this optional memory board (MEM/MEM-2), it can be used for the expansion memory. 1. Block diagram Refer to the Related Signal or Memory Board Diagram.
  • Page 493 Page: 265 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Related Signals of Memory Board...
  • Page 494 PC Multiplex function Disable Enable Interface between Fax machine and Host PC consists of three layer structure as detailed below, each sub-system can be operated at the same time by adopting a Oki-MFPI protocol in both Fax machine and Host PC. a) Application layer: Performs a function control of each sub-system at the Host PC and Fax machine.
  • Page 495 Encodes a raster image data in Host PC and transfers a data with HIPER-W emulation. 2) Scanner (Oki-SCL 1: Oki-Scanner Control Language 1) Transfers and image data of document scanned in Fax machine to the Host PC with Oki-SCL 1 command. 3) FaxModem (TIA/EIA Class 1) Send/receive a Class 1 command between Host PC and Fax machine.
  • Page 496 Page: 267 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Related Signals of P050 (PC interface unit) Diagram...
  • Page 497 Page: 268 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions A3.9 TQSB (Second tray) Circuit Diagram: option 1. Block diagram This board is installed as the optional board for the unit. Refer to the Block Diagram of the Second Tray (Option).
  • Page 498 Page: 269 Service Guide OKIFAX 5250/5400 Chapter A Board Descriptions Block Diagram of 2nd Tray < same diagram -- side view >...
  • Page 501 Page: 270 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description Overview This appendix describes the print operation processes and assemblies of the unit. B.1 Mechanical Components B.2 Description of Print Operations B.3 Errors B.4 Other Special Cases...
  • Page 502 Page: 271 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.1 Mechanical Components 1) Image drum cartridge 2) Resist motor 3) Drum motor 4) LED head 5) Fuser Layout of Print Station Components...
  • Page 503 Page: 272 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 1) Image drum cartridge The image drum cartridge I/D or EP (electro-photographic) consists of an image drum, a charger, and a developer. The cartridge forms a toner image on the drum, using an electrostatic latent image formed by the LED print head.
  • Page 504 Page: 273 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 2) Resist motor This resist motor is a pulse motor of 48 steps/rotation that is two-phase excited by the signal from the M17 board. It drives the hopping roller and the resist roller via two one-way clutches according to the direction of rotation.
  • Page 505 Page: 274 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 3) Drum motor This drum motor is a pulse motor of 48 steps/rotation that is two-phase excited by the signal from the M17 board and is the main motor of this mechanism.
  • Page 506 Page: 275 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 4) LED head Image data for each dot on a line from the M17 board is received by the shift registers and latch registers. The Letter size LED head are driven to radiate the image data on to the EP (image) drum.
  • Page 507 Page: 276 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 5) Fuser The fuser consists of a heater, a heat roller, a thermister and a thermostat. An AC voltage from the power supply board (1VP/2VP) is applied to the heater under the control of the HEAT-N signal from the M17 board.
  • Page 508 Page: 277 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description Layout of Print Station Components < same diagram - side view >...
  • Page 511 Page: 278 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.2 Description of Print Operations B2.1 Process Operations...
  • Page 512 Page: 279 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B2.1 Process Operations 1) Hopping and feeding 2) Charging 3) Exposure 4) Developing 5) Transfer 6) Fusing 7) Cleaning 8) Cleaning of rollers...
  • Page 513 Page: 280 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 1) Hopping and feeding Hopping and feeding are affected by a single resist motor in the mechanism shown below. Turning the resist motor in the "a" direction drives the hopping roller. Turning the resist motor in the "b" direction drives the resist roller.
  • Page 514 CW = Clockwise (b) Feeding After end of hopping, turning the resist motor in the "b" direction (in the counter-clockwise [CCW] direction) drives the resist roller to advance the paper. (In this case, the hopping gear also turns, but the hopping roller is prevented from turning by the one-way clutch gear.) The paper is further advanced in synchrony with the print data.
  • Page 515 CCW = Counterclockwise...
  • Page 516 Page: 281 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 2) Charging Charging is affected by applying a DC voltage to the charge roller that is in contact with the image drum surface. The charge roller is composed of two layers consisting of a conductive layer and a surface protective layer that has elasticity, in order to secure a good contact with the image drum.
  • Page 518 Page: 282 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 3) Exposure Light emitted from the LED head irradiates the image drum surface with negative charges. The surface potential of the irradiated part of the image drum drops, thereby forming an electrostatic latent image associated with the image signal.
  • Page 519 When light from the LED head irradiates the image drum surface, the light energy generates positive and negative carriers in the CGL. The positive carriers are moved to the CTL by an electrical field acting on the image drum. Likewise, the negative carriers flow into the aluminum layer (ground). The positive carriers moved to the CTL combine with the negative charges on the image drum surface accumulated by the contact charge of the charge roller, lowering the potential on the image drum surface.
  • Page 520 Page: 283 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 4) Developing Toner is attracted to the electrostatic latent image on the image drum surface to convert it into a visible toner image. Developing takes place at the contact between the image drum and the developing roller.
  • Page 521 denote the direction of the electric field). Note: The toner supply roller and the developing roller are supplied with bias voltages required during the developing process as shown below. -450 VDC is supplied to the toner supply roller, -300 VDC to the developing roller.
  • Page 522 Page: 284 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 5) Transfer The transfer roller is composed of conductive sponge material and is designed to make the image drum surface and the paper closely into contact. Paper is placed over the image drum surface, and a positive charge, opposite in polarity to the toner, is applied to the paper from its reverse side.
  • Page 523 Page: 285 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 6) Fusing After the end of the transfer operation, the unfused toner image is fused on the paper under heat and pressure as it passes between the heater roller and the back-up roller. The heater roller with a Teflon coating incorporates a 500 W heater (Halogen lamp), which heats the heat roller.
  • Page 524 Page: 286 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 7) Cleaning After the end of the transfer, residual toner on the image drum is attracted to the cleaning roller temporarily by static electricity to clean the image drum surface.
  • Page 525 Page: 287 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description 8) Cleaning of rollers The charge roller, transfer roller and cleaning roller are cleaned in the following cases: In warning up at power-on time In warning up after the cover is opened and closed...
  • Page 526 Page: 288 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.3 Errors B.3.1 Errors List B.3.2 Major Trouble Errors B.3.3 Recoverable Errors...
  • Page 527 Page: 289 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.3.1 Errors List The errors are listed below. 1) Major trouble errors Fuser error (Printer Alarm 4) Fan error (Printer Alarm 3) Paper supply error Paper transport system error...
  • Page 528 Page: 290 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.3.2 Major Trouble Errors B.3.2.1 Fuser Error B.3.2.2 Fan Error B.3.2.3 Paper Feed Monitoring B.3.2.4 2'nd Tray Communication Error B.3.2.5 Cover Open...
  • Page 529 Page: 291 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.3.2.1 Fuser Error The fuser error indicates an error in thermister on heater. In case the fuser error occurs at the time of printing, the heater is turned off soon but the printing continues of that page.
  • Page 530 Page: 292 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.3.2.2 Fan Error The fan error is generated when the FANSNS signal lead goes "1" while the fan is running at full speed. Operation of the FANSNS signal when the fan is turned on is described below.
  • Page 531 Page: 293 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.3.2.3 Paper Feed Monitoring Status Description of Supervising Sensor Distance Paper supply error Indicates monitoring error in hopping. 118 mm (4.64") or less path Hopping is retried 3 times.
  • Page 532 Page: 294 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.3.2.4 2'nd Tray Communication Error (Printer Alarm 2) This error is generated if on sending a command to the 2'nd tray is returned no-status (40s) or an undefined status.
  • Page 533 Page: 295 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.3.2.5 Cover Open Cover open sensor "0" indicates an open cover. When the cover is closed the CU (control unit) section sends the reset signal and processes in the same way as if...
  • Page 534 Page: 296 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B3.3.3 Recoverable Errors The three recoverable errors are listed in the table below. Status Description of Supervising Sensor 2'nd tray route open Paper supply route from the option 2'nd tray to the main body is open, recording paper of the 1'st tray is being replaced.
  • Page 535 Page: 297 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B3.3.3.1 Toner Low Detection Composition Operation Operation during toner full state Operation during toner low state Low Toner Alarm...
  • Page 536 Page: 298 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description Composition The device consists of the stirring gear which rotates at a constant rate, the stirring bar and the magnet on the stirring bar. The stirring bar rotates through the link on the protrusion in the stirring gear.
  • Page 537 Page: 299 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description Operation Toner Low is detected by monitoring the time interval between the encounter of the magnet set on the sensor lever and the magnet on the stirring bar.
  • Page 538 Page: 300 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description Operation during toner full state The stirring bar rotates due to interlocking with the stirring gear. When the magnet on the stirring bar reaches the maximum height, since the other end of the bar is being dipped in the toner.
  • Page 539 Page: 301 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description Operation during toner low state Operation during toner low state When the stirring bar reaches the maximum height, the small amount of toner at the other end of the bar offers little resistance. The bar falls to the minimum height due to its own weight.
  • Page 540 Page: 302 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description Low Toner Alarm A check for low toner is carried out at all times when the drum is rotating (rotation in opposite direction is excluded). The toner sensor is not monitored while the drum motor is in halt.
  • Page 541 Page: 303 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.4 Other Special Cases B.4.1 Manual Paper Feed B.4.2 Cleaning...
  • Page 542 Page: 304 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.4.1 Manual Paper Feed Turning on of the inlet sensors without the hopping operation indicates manual paper feeding for OKIFAX 5250 & OKIFAX 5400 (excluding when power is on).
  • Page 543 Page: 305 Service Guide OKIFAX 5250/5400 Chapter B Print Operation Description B.4.2 Cleaning The image drum needs regular cleaning. The two kinds of cleaning are listed in the table below. Cleaning Type Function Remarks Cleaning This cleaning removes the toner whose...
  • Page 544 Page: 306 Service Guide OKIFAX 5250/5400 Chapter C Circuit Diagrams C.1 General Information The OKIFAX 5250 and OKIFAX 5400 Circuit Diagrams contain component level repair information and are OKIDATA proprietary.
  • Page 545 Page: 307 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List Assembly...
  • Page 548 Page: 308 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 1: Cabinet Assembly...
  • Page 550 Rev. Oki parts Number Description Q'ty Remarks 1PA4120-1079G1 Hopper: Document assy. 50607301 RSPL 2PP4120-1084P1 Tray: Sub Hopper 50220901 RSPL 2PP4120-1091P1 Cover: NCU 53075901 RSPL 1PP4120-1089P1 Cover: Main 53075801 RSPL 2PA4083-6130G1 Guide: Manual Feed Assy (Gray) 51011001 RSPL 40044501 Board-UNC 40044501 RSPL...
  • Page 551 Page: 309 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 2: Control Panel Assembly...
  • Page 553 Rev. Oki parts Number Description Q'ty Remarks 40105301 Unit: Op Panel (OF5250 55083202 RSPL 40079101 Unit: Op Panel (OF5400) 40079109 RSPL Film: One-touch Cover 52203301 RSPL Sheet: One-touch (L) 52081310 RSPL Sheet Label: Ten Key 40047001 Sheet: One Touch (OF5400)
  • Page 554 Page: 310 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 3A: Printer Assembly (1 of 2) Rev. Oki parts Number Description Q'ty Remarks 2PA4120-1214G1 Cover: Stacker Assy 53077801 RSPL 4PB3517-1567P1 Wire: Guide 51013801 RSPL 4YB4120-1117P1 Motor: (Main) 56512701 RSPL...
  • Page 555 4PP4083-6052P1 Bushing: Pressure Roller 51607601 RSPL 4PP4083-6065P1 Spring: Bias 50925301 RSPL 1PP4083-6035G001 Base: Lower Sub Assy 50223201 RSPL 3PP4083-6058P1 Arm: Cover Open 53068901 RSPL 3PP4083-6053P1 Lever: Reset (L) 50805801 RSPL 4PP4083-6057P1 Spring: Stacker Cover Reset 50924201 RSPL 4PB4083-6197P1 Gear: Stacker Cover Damper 51229401 RSPL 4PP4083-6191G1 Arm: Stacker Cover Damper...
  • Page 556 Page: 311 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 3B: Printer Assembly (2 of 2) Rev. Oki parts Number Description Q'ty Remarks 2PA4120-1085G1 Guide: Release Assy. 51019201 RSPL...
  • Page 557 4PP4120-1087P1 Spring: Release 50930001 RSPL 4YA4116-1228G1 LED Head (1228G10 56112101 RSPL 224A1286P0140 Connector: LED Cable 56730201 RSPL 4YX4120-1124G1 Cable: LED Head Assy 56632401 RSPL Screw Screw Screw Screw Screw Screw 4PA4120-1170G1 Wire: Sensor Assy. 40778901 RSPL 4PP4120-1209P1 Washer: B 50517001 RSPL 4PP4120-1210P1 Washer: C 50517201 RSPL...
  • Page 558 Page: 312 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 4A: Base Assembly (1 of 2)
  • Page 560 Rev. Oki-J and or OKI Parts Description Q'ty Oki P/N & Remarks Number 4YB4049-7082P1 Transformer: 120 V 56414201 RSPL 4YB4049-7083P1 Transformer: 230 V 56414001 RSPL 3PA4083-6090G1 Assy: Contact 56730001 RSPL 40319201 PWR Unit-ACDC DROP (120V) 40319201 RSPL 40035902 PWR Unit-ACDC DROP (230V)
  • Page 561 Page: 313 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 4B: Base Assembly (2 of 2)
  • Page 563 Rev. Oki parts Number Description Q'ty Remarks 40123401 Plate: Assembly (PC Interface) 40123401 RSPL (OF5600) 4PP4120-1187P1 Plate: Earth (PCFX) (OF5600) 51024001 RSPL 4PP4083-7665P001 FG Plate D 51023601 RSPL 4YC4061-5115P001 Tape: Teflon 40275501 Plate-Guard 40275501 PB4120-1130P001 Screw-Hexagon 40545401 Sheet: Shield 4PP4120-1187P001 Plate Earth (PCFX) *Part of Base Assembly, P/N 51018901, which is an RSPL item.
  • Page 564 Page: 314 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 5: Scan Unit...
  • Page 565 Rev. Oki-J Part Number Description Q'ty Oki Data P/N 1PP4120-1015P001 Frame: Scanner 53350701 RSPL 2PP4120-1034P1 Base: Scanner (L) 50221101 RSPL 4PP4120-1023P1 Plate: ADF Ground 51019901 RSPL 4PP4120-1017P1 Lever: PC2 50808801 RSPL 4PP4120-1016P1 Lever: PC1 50808701 RSPL 3PP4120-1038P1 Pocket Plate 51020001 RSPL...
  • Page 566 Page: 315 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 6: Paper Guide U Assembly...
  • Page 568 Rev. Oki-J Part Number Description Q'ty Oki Data P/N & Remarks 3PA4120-1045G1 Roller: Feed (1) Assy. 50410301 RSPL 4PP4120-1226P001 Plate: Earth (SR) 51023801 RSPL 4PP4120-1227P001 Plate: Earth (SL) 51023901 RSPL 4YS4011-1714P2 Earth Cord (Ground Wire) 56634702 1PP4120-1040P001 Guide: Paper (U)
  • Page 569 Page: 316 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 7: Cables...
  • Page 570 Oki-J Part # Description Q'ty Oki Part # & Remarks...
  • Page 571 40040002 Cord: Op Panel Connection 40041002 RSPL 4YB4120-1026P1 Speaker 57001701 RSPL 3YS4111-3527P2 Cable: 2nd Tray Connector 56632801 RSPL 4YS4111-3441P1 Cord: Connector (C1S) 56634501 RSPL 4YS4111-3442P1 Cord: Connector (PC1/2) 56634601 RSPL 105A1070C0001 Core: Ferrite D 55505201 RSPL 4YS3512-1485P1 Cord: AC Power 56618901 RSPL 236A6058P0001 Cord: AC 220V (pictured)
  • Page 572 Page: 317 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 8: Option Telephone...
  • Page 573 Rev. Oki parts Number Description Q'ty Remarks 1PP4120-1095P011 Cradle 4YA4129-1006G001 Board-Hook 4YA4129-1005G001 Board-TELU 1PP4120-1096P001 Base-Cradle...
  • Page 574 3PP4120-1097P001 Cover-Terminal 3PA4120-1140G001 Attachment-Assembly 4YB3512-2029G004 Handset 4YS4111-5552P001 Connection-Cord 4YS4111-5551P001 Moduler-Jack Cord 4YS3522-1252G002 Cord-Handset 56628101 RSPL Tapping-Screw Screw 4PB4120-1136P001 Knob-Screw 4PB4016-1960P001 Rubber-Foot...
  • Page 575 Page: 318 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 9A: Second Paper Feed (Option) Rev. Oki parts Number Description Q'ty Remarks 1PP4122-1401P001 Plate: Upper 51023301 3PA4122-1370G001 Guide: Sheet Assembly 50222001 1PA4122-1369G001 Cover: Front Assembly 53075301 3PA4122-1371G001 Guide: Inner Assembly...
  • Page 576 3PB4122-1399P001 Motor: Pulse 56512201 4PP4122-1384G001 Bracket 51712001 4PP4122-1383P001 Gear (Z24) 51238901 4PP4122-1226P001 Gear (Z87/Z60) 51239101 4PP4122-1389P001 Plate: Bottom 51023201 4PP4122-1365G001 Guide: 2nd Cassette (L) Assembly 50222301 3PA4122-1367G001 Roller: Hopping Assy 2nd Tray 50409501 1YX4122-1364G002 Guide: 2nd Cassette (R) Assembly 50222201 4PB4122-1382P001 Clutch: One-way 2nd Tray 51401101...
  • Page 577 Page: 319 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 9B: Second Paper Feed (Option) Rev. Oki parts Number Description Q'ty Remarks 1PP4122-1401P001 Plate: Upper 51023301 3PA4122-1370G001 Guide: Sheet Assembly 50222001 1PA4122-1369G001 Cover: Front Assembly 53075301 3PA4122-1371G001 Guide: Inner Assembly...
  • Page 578 3YS4111-3528P001 Cable & Connector 56633901 3PB4122-1399P001 Motor: Pulse 56512201 4PP4122-1384G001 Bracket 51712001 4PP4122-1383P001 Gear (Z24) 51238901 4PP4122-1226P001 Gear (Z87/Z60) 51239101 4PP4122-1389P001 Plate: Bottom 51023201 4PP4122-1365G001 Guide: 2nd Cassette (L) Assembly 50222301 3PA4122-1367G001 Roller: Hopping Assy 2nd Tray 50409501 1YX4122-1364G002 Guide: 2nd Cassette (R) Assembly 50222201 4PB4122-1382P001 Clutch: One-way 2nd Tray...
  • Page 579 Page: 320 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List 10: Miscellaneous Whole Unit Consumables Options...
  • Page 580 Page: 321 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List Whole Unit Model Description Part # OF5250 120V English 62210701 OF5250 120V English / Latin American Spanish 62210702 OF5250 120V English / Brazilian Portuguese 62210703 OF5400 120V English 62210401...
  • Page 581 Page: 322 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List Consumables Kit: Image Drum P/N 56116901 Cartridge: Toner P/N 52106701...
  • Page 582 Page: 323 Service Guide OKIFAX 5250/5400 Chapter D Illustrated Parts List Options 1 MB Memory, No Battery Backup P/N 70029101 1.5 MB Memory, Battery Backup P/N 70031501 2 MB Memory, No Battery Backup P/N 70029201 2.5 MB Memory, Battery Backup...
  • Page 583 Page: 324 Service Guide OKIFAX 5250/5400 Chapter E Board Layout Diagram The boards used in the OKIFAX 5250 and OKIFAX 5400 are listed below. Main Control Board (E17) UNC-5 (Network Control Unit) Power Supply Unit O5WH (Operator Panel) Board S34 (Modem) Board MODEM (OKIFAX 5400 Only)
  • Page 584 Rev. Oki parts Number Description Q'ty Remarks 40040002 Cord: Op Panel Connection 40041002 RSPL 4YB4120-1026P1 Speaker 57001701 RSPL 3YS4111-3527P2 Cable: 2nd Tray Connector 56632801 RSPL 4YS4111-3441P1 Cord: Connector (C1S) 56634501 RSPL 4YS4111-3442P1 Cord: Connector (PC1/2) 56634601 RSPL 105A1070C0001 Core: Ferrite D...
  • Page 585 40048201 Connection Cord-Wire (PSU) 40040101 Connection Cord-Wire (SPSU) 105A1062C0002 0443-167251 Core 105A1068C1004 5FC-8 Core 105A1070C0004 TFC-23-11-14 Core 105A1070C0003 Core: Ferrite 55505203 RSPL 4YB4120-1094P0001 Secondary Battery 56306901 4LP-1466 Band: Snap 50702001 55083401 PCB: Main Controller (OF5250) Main Assy 1 55083801 RSPL 55083501 PCB: Main Controller (OF5400) Main Assy 1 40476108 RSPL...
  • Page 586 Page: 325 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 1. Outline 1.1 Functions 1.2 External View and Component Names (Figure 1-1)
  • Page 587 Page: 326 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 1.1 Functions When the Second Paper Feeder is installed with the OKIFAX 5400 facsimile transceiver, the Second Paper Feeder is connected to the facsimile by a connector. The Second Paper Feeder supplies paper automatically through the operation of pulse motor (hopping), which is driven by signals sent from CPU of the Second Paper Feeder under the control of the facsimile.
  • Page 588 Page: 327 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 1.2 External View and Component Names...
  • Page 589 Page: 328 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 2. Mechanism Description 2.1 General Mechanism 2.2 Hopper Mechanism...
  • Page 590 Page: 329 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 2.1 General Mechanism The Second Paper Feeder feeds the paper into the facsimile by receiving the signal from the facsimile, which drives the pulse motor inside the Second Paper Feeder, and this motion is transmitted to rotate the one-way clutch of the hopping frame assembly.
  • Page 591 Page: 330 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 2.2 Hopper Mechanism The hopper automatically feeds the facsimile with the paper being set, single sheet at a time. When the paper is loaded in the paper cassette, it is then transported by the pulse motor, carrying forward only a single sheet caught by...
  • Page 592 Page: 331 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 3. Parts Replacement This section covers the procedures for the disassembly, reassembly and installations in the field. This section describes the disassembly procedures, and for reassembly procedures, basically proceed with the disassembly procedures in the reverse order.
  • Page 593 Page: 332 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 3.1 Precautions Concerning Parts Replacement (1) Parts replacements must be carried out, by first turning the facsimile power switch off "O" and removing the facsimile from the Second Paper Feeder.
  • Page 594 Page: 333 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 3.2 Parts Layout This section describes the layout of the main components.
  • Page 595 Page: 334 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 3.3 Parts Replacement Methods This section describes the parts replacement methods for the components listed in the disassembly order diagram below. Second Paper Feeder Stepping motor (hopping) (3.3.1) TQSB-2 PCB (3.3.2)
  • Page 596 Page: 335 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 3.3.1 Stepping Motor (Hopping) (1) Turn the facsimile power switch off, pull out the AC cord from the outlet. Remove the facsimile from the Second Paper Feeder. (2) Take the paper cassette assy 1 out of Second Paper Feeder.
  • Page 597 (6) Remove three screws 9 which are holding the guide R (2nd) assy 10 to the bottom plate 11. Remove the screw 12 which is keeping the rear cover 13 and guide R (2nd) assy 10. Remove the guide R (2nd) assy 10. (7) Remove the protect (M) 14, guide bracket 15, planet gears 16 and planet gear bracket 17.
  • Page 598 (9) Remove three remaining screws 21 which are keeping the motor on the motor bracket 22, and remove the connector off the Stepping Motor 23. (10) Remove two screws 24 on the Stepping Motor 23.
  • Page 600 Page: 336 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 3.3.2 TQSB2-PCB (1) Remove the pulse motor (see 3.3.1). (2) Remove the connector 25 from the TQSB-2PCB 26. (3) Remove the screw 27 and remove the TQSB-2PCB 26. Note:...
  • Page 601 Page: 337 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 3.3.3 Hopping Roller Shaft Assy and One-way Clutch Gear (1) Follow up to step (3) of 3.3.1 and remove the hopping frame assy. (2) Remove the screw 1 and remove the earth plate 2. Remove the sensor lever 7 and remove the ground plate 6.
  • Page 602 Page: 338 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 4. Troubleshooting 4.1 Precautions Prior to the Troubleshooting 4.2 Preparations for the Troubleshooting 4.3 Troubleshooting Method 4.3.1 LCD Status Message List...
  • Page 603 Page: 339 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 4.1 Precautions Prior to the Troubleshooting (1) Go through the basic checking list provided in the user's documentation. (2) Obtain as much information as you can from the user about the problem.
  • Page 604 Page: 340 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 4.2 Preparations for the Troubleshooting (1) Display on the Operator panel The status of the problem is displayed on the LCD (Liquid Crystal Display) on the Operator panel. Go through the...
  • Page 605 Page: 341 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 4.3 Troubleshooting Method When a problem occurs, go through the troubleshooting according to the following procedure.
  • Page 606 Page: 342 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 4.3.1 LCD Status Message List *1: Indicates the same message on the display, when 1st or 2nd cassette becomes jam error (feeding). *2: However, if 1st cassette has recording paper, LCD indicates the standby mode on the display and alarm...
  • Page 609 Page: 343 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 5. Connection Diagram 5.1 Interconnection Diagram 5.2 PCB Layout...
  • Page 610 Page: 344 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 5.1 Interconnection Diagram...
  • Page 611 Page: 345 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 5.2 PCB Layout...
  • Page 612 Page: 346 Service Guide OKIFAX 5250/5400 Chapter F Second Paper Feeder 6. Parts List 1: Cabinet and Cassette Assembly...
  • Page 613 2: Paper Feeder...
  • Page 614 Rev. Oki-J Part Number Description Q'ty Oki Data P/N 1PP4122-1401P001 Plate: Upper 51023301...
  • Page 615 3PA4122-1370G001 Guide: Sheet Assembly 50222001 1PA4122-1369G001 Cover: Front Assembly 53075301 3PA4122-1371G001 Guide: Inner Assembly 50221501 1PA4122-1362G004 Cassette Assembly (2nd Tray) 50107304 4PP4120-1009G001 Frame: Separation (F) Assembly 53345801 1PP4122-1323P001 Cover: Rear 53075201 4PB4122-1441P001 Ground: Stick Finger 51023401 1PA4122-1366G001 Frame: Hopping Assembly 50222401 4PP3522-3568P001 Bearing...
  • Page 616 Page: 347 Service Guide OKIFAX 5250/5400 Chapter G RMCS System Introduction All RMCS stands for the Remote Management Center System. RMCS refers to setting registration data and conducting the following types of maintenance operations from a remote location. (Refer to Figure 1) The purpose of this system is to speed up customer service and reduce maintenance costs.
  • Page 617 Page: 348 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 1. Notes to Users 1.1 Identifying the Packaged Contents 1.2 Required Devices 1.3 Connectable Peripheral Equipment...
  • Page 618 Page: 349 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 1.1 Identifying the Packaged Contents Before using this system, the packaged contents with the package list. Contact your dealer if any component from the package.
  • Page 619 Page: 350 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 1.2 Required Devices The following devices and software are required to operate this system. Personal computer IBM PC/AT or compatible model Internal memory 300KB or more Extended memory 1MB or more...
  • Page 620 Page: 351 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 1.3 Connectable Peripheral Equipment Printer Mouse Microsoft mouse or equivalent Telephone To use a mouse, a mouse driver program is required. This program is automatically incorporated by the installation program.
  • Page 621 Page: 352 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 2. Setup 2.1 Mounting 2.1.1 Mounting Procedures 2.2 Installation 2.2.1 Registrering the RMCS Basic System 2.2.2 Registering the Facsimile Model No. 2.2.3 Deleting the Facsimile Model No. 2.2.4 Updating the Password 2.2.5 Updating the Dip Switches...
  • Page 622 Page: 353 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 2.1 Mounting Conceptual connection diagram of RMCS with other devices This system (RMCS Model 20) is used FX050 series Facsimile with PC-I/F. Conceptual connection diagram of RMCS Model 20 with other devices...
  • Page 623 Page: 354 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 2.1.1 Mounting Procedures 1) Before operation, disconnect the power plug of the IBM PC/AT from the system plug socket. 2) Disconnect the power plug of FX050 series Facsimile, too and set PC-I/F board to the Facsimile.
  • Page 624 Page: 355 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 2.2 Installation When the PC/AT is activated by using the hard disk, insert an RMCS system disk into drive A. When C>_ is displayed, enter commands as shown below to activate the installation program.
  • Page 625 Page: 356 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 2.2.1 Registering the RMCS Basic System The flow of new registration is different from that of updating. First, the flow of new registration is described below. 1) Enter the drive No. used to register the system.
  • Page 626 4) When you use RMCS Model 10, set the dip switches on the RMCS card. Normally, you need only press [Enter]. When an other extension slot and conflicting address space are being used, change the address space with the dip switches, then set the contents by using 1 and 0.
  • Page 627 Page: 357 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 2.2.2 Registering the Facsimile Model No. 1) Search the directory in which the system is registered. When the system is found, register the model number. 2) Insert a disk corresponding to the model into drive A, then press any key. The model number is displayed and the confirmation screen is displayed.
  • Page 628 Page: 358 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 2.2.3 Deleting the Facsimile Model No. 1) Search the directory in which the system is registered. When the system is found, a list of registered models is displayed. 2) Select the model number to be deleted. This number is then displayed in inverse video. The confirmation screen is also displayed.
  • Page 629 Page: 359 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 2.2.4 Updating the Password 1) Search the directory in which the system is registered. When the system is found, the old password is displayed on the screen. You are prompted to enter a new password.
  • Page 630 Page: 360 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 2.2.5 Updating the Dip Switches This setting is available for only RMCS Model 10. 1) Search the directory in which the system is registered. When the system is found, the dip switch setting is displayed.
  • Page 631 Page: 361 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 2.2.6 Deleting the RMCS Basic System 1) When to delete, enter [Y], then whole RMCS system is deleted. When not to delete, enter [N]. The installation menu appears.
  • Page 632 Page: 362 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 3. RMCS Basic Operation 3.1 Activating and Terminating the system 3.1.1 To Activate 3.1.2 Entering the ID and Password 3.2 TEL Directory 3.2.1 To Terminate 3.2.2 Selecting Destination Drive 3.3 Main Menu...
  • Page 633 Page: 363 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 3.1 Activating and Terminating the system Before Activating the system If the facsimile terminal is equipped with a selector function to "enable" or "unable" remote maintenance, set to "enable" in advance.
  • Page 634 Page: 364 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 3.1.1 To Activate Enter the following command in the PC-DOS command input state. C>RMCS After completing the necessary preparations, the ID and password entry screen is displayed.
  • Page 635 Page: 365 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 3.1.2 Entering the ID and Password The ID is recorded in the operation report as part of the system operator history. Enter up to 50 alphanumeric characters except ["], [\] for the ID.
  • Page 636 Page: 366 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 3.2 TEL Directory You can select such services (items) registration and deletion of information related to users. There are two ways to specify an item: select by using the up arrow key and the down arrow key, then press [Enter]...
  • Page 637 Page: 367 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 3.2.1 To Terminate To terminate this system select "Terminate" on TEL directory menu screen or the main menu screen to return to PC-DOS. Caution: After terminating remote management, restore the original facsimile terminal setting.
  • Page 638 Page: 368 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 3.2.2 Selecting Destination Drive Now, select the destination drive. Press [Space] to change the drive name. Select "Terminate" to stop processing and return to the TEL directory menu screen. Select "Execute" to copy user information between the drives and return to the TEL directory menu screen.
  • Page 639 Page: 369 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 3.3 Main Menu The main menu screen varies according to FAX models. There are two ways to specify an item: select by using the [up arrow] and [down arrow] keys, then press [Enter] or enter the number before each item.
  • Page 640 Page: 370 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 3.4 Environment Setting Selecting "ENVIRONMENT SETTING" on the main menu to display this screen. Communication port setting: Select communication port to connect the IBM PC/AT and PC-I/F. Frame size setting: Select a frame size for each frame to transfer TEL number data and program/language/default data during execution of File [LOAD] (Center to FAX) and [EDIT] (ON LINE).
  • Page 641 Page: 371 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 4. Message Modifying Tool 4.1 Activating the Program 4.2 Modifying Message 4.2.1 File Selection 4.3 Saving Message 4.3.1 Confirmation 4.4 Loading Message 4.4.1 Confirmation 4.5 Other Message File...
  • Page 642 Page: 372 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 4.1 Activating the Program After the computer finishes booting from the hard drive, insert the RMCS system disk into drive A. When C>_ is displayed, enter the following commands to activate the program.
  • Page 643 Page: 373 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 4.2 Modifying Message File selection: Select "MESSAGE MODIFY" on the menu screen, then the following screen is displayed. Enter the key No. indicated on the left of the model to modify. Then the screen for file selection is displayed.
  • Page 644 Page: 374 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 4.2.1 File Selection Select the message title to modify. Select the position with [up arrow key], [down arrow key], [<---] and [--->] keys, and press the [Enter] key, then the position is selected.
  • Page 645 Page: 375 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 4.3 Saving Message Model Selection: Select "MESSAGE SAVE" on the menu screen. then the following screen is displayed. Enter the key number indicated on the left side of the model with messages to store.
  • Page 646 Page: 376 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 4.3.1 Confirmation Select a drive with the [Space] key. Since it is assumed that data is stored on a floppy disk, you can select drive A or drive B. When setup is ready, insert a formatted floppy into the drive and press the [Enter] key, then saving is initiated.
  • Page 647 Page: 377 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 4.4 Loading Message Model Selection: Select "MESSAGE LOAD" on the menu screen, the following screen is displayed. Enter the key number indicated on the left side of the model with a message reset.
  • Page 648 Page: 378 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 4.4.1 Confirmation Select a drive with the [Space] key. It is assumed that a message is loaded on the machine from the floppy disk, you can select drive A or drive B.
  • Page 649 Page: 379 Service Guide OKIFAX 5250/5400 Chapter G RMCS System 4.5 Other Message File In addition to the "scrn OOOO. lx" file, the following message files are available. RMCS SYSTEM err_mess. tx Error message text rms_env. tx Operator ID text sc OOOO p.
  • Page 650 Page: 380 Service Guide OKIFAX 5250/5400 Chapter H Product Service Bulletins H.1 General Information OKIDATA's Product Service Bulletins contain technical information obtained after product release. Firmware updates, part number changes, and procedural changes are some of the subjects covered by these bulletins.
  • Page 651 Page: 381 Service Guide OKIFAX 5250/5400 Chapter H Product Service Bulletins OKIDATA'S Web Site OKIDATA's Web Site provides easy access to OKIDATA's product and service information. The Business Partner Exchange (BPX) provides Dealer-Only information to OKIDATA's sales and service providers. The information covers ALL OKIDATA products, and is constantly updated.
  • Page 652 Page: 382 Service Guide OKIFAX 5250/5400 Chapter I Recommended Spare Parts List (RSPL) I. General Information Recommended Spare Parts Lists (RSPL's) contain the current part numbers, descriptions, and pricing information for OKIDATA product spare parts. The Recommended Spare Parts Lists are distributed via OKIDATA's BPX Web site.
  • Page 653 Page: 383 Service Guide OKIFAX 5250/5400 Chapter I Recommended Spare Parts List (RSPL) OKIDATA'S Web Site OKIDATA's Web Site provides easy access to OKIDATA's product and service information. The Business Partner Exchange (BPX) provides Dealer-Only information to OKIDATA's sales and service providers. The information covers ALL OKIDATA products, and is constantly updated.

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