Ricoh FAX550 Service Manual
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Ricoh FAX550 Service Manual

Ricoh FAX550 Service Manual

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FAX550
SERVICE MANUAL

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  • Page 1 FAX550 SERVICE MANUAL...
  • Page 2 Lithium Batteries (Memory Back-up) CAUTION: The danger of explosion exists if a battery of this type is incorrectly replaced. Replace only with the same or an equivalent type recommended by the manufacturer. Discard used batteries in accordance with the manufacturer’s instructions.

  • Page 3: Table Of Contents

    CONTENTS 1. OVERALL MACHINE INFORMATION 1.1. SPECIFICATIONS ....1-1 1.2. FEATURES ..... 1-2 1.3.
  • Page 4 2.3. PCBs AND THEIR FUNCTIONS ... . . 2-7 2.3.1. FCU ..... . 2-7 2.3.2.
  • Page 5 4.4. DEDICATED TRANSMISSION PARAMETERS ..4-27 4.4.1. Programming Procedure ....4-27 4.4.2. Parameters ....4-28 4.5.
  • Page 6 6. TROUBLESHOOTING 6.1. COPY QUALITY TROUBLESHOOTING ..6-1 6.1.1. Received Copies ....6-1 6.1.2. Copies made in Copy Mode ... . . 6-1 6.2.

  • Page 7: Overall Machine Information

    OVERALL MACHINE INFORMATION November 30th, 1991 SPECIFICATIONS 1. OVERALL MACHINE INFORMATION 1.1. SPECIFICATIONS Type Protocol Desktop transceiver Group 3 with ECM Circuit Data Rate PSTN, PABX 9600/7200/4800/2400 bps; automatic fallback Connection I/O Rate Direct couple With ECM: 0 ms/line Without ECM: 5, 10, 20, or 40 ms/line Document Size Length: 105 - 1200 mm...

  • Page 8: Features

    November 30th, 1991 OVERALL MACHINE INFORMATION FEATURES 1.2. FEATURES KEY: Communication Features - O = Used, X = Not Used, User Selectable A = With optional memory only Action as a transfer broadcaster AI Redial Equipment Alternative Destination Answering machine Bar code reader Authorized Reception Built-in handset...
  • Page 9 OVERALL MACHINE INFORMATION November 30th, 1991 FEATURES Communication Features - Memory Lock ID User Selectable Modifying a memory file Speed Dial (100) Multi Sort Document Reception Telephone Directory Multicopy mode Tonal Signal Transmission Night Timer Transfer Request: 30 stations Own telephone number Transmission Deadline Printing a memory file Turnaround Polling...
  • Page 10 November 30th, 1991 OVERALL MACHINE INFORMATION FEATURES Memory Files Reports - User-initiated Specified Cassette Selection List Max. number of files: 100 Speed Dial List Max. number of stations/file: 142 Max. number of stations overall: 299 Transmission Status Report Max. number of pages overall: 200 User Function List (including pages stored as Auto User Parameter List...

  • Page 11: Component Layout

    OVERALL MACHINE INFORMATION November 30th, 1991 COMPONENT LAYOUT 1.3. COMPONENT LAYOUT 1.3.1. Mechanical Components R2 Rollers Feed the document through the scanner. Exposure Glass Exposes the original to light from the xenon lamp. Xenon Lamp Illuminates the document. R1 Rollers Feed the document through the scanner.

  • Page 12: Drive Components

    November 30th, 1991 OVERALL MACHINE INFORMATION COMPONENT LAYOUT 1.3.2. Drive Components R2 Roller Drive Gear Drives the R2 roller. Scanner Drive Gear Transfers drive from the Tx motor to the scanner and ADF. R1 Roller Drive Gear Drives the R1 roller. Document Feed Idle Transfers drive from the Tx motor to the Gear...

  • Page 13: Electrical Components

    OVERALL MACHINE INFORMATION November 30th, 1991 COMPONENT LAYOUT 1.3.3. Electrical Components Name Description PCBs This board controls the machine. This board contains the system ROM and RAM for storing system parameters such as bit switch settings and programmed telephone numbers. This board contains the CCD.
  • Page 14 November 30th, 1991 OVERALL MACHINE INFORMATION COMPONENT LAYOUT Name Description CLUTCHES ADF Clutch This transfers drive from the tx motor to the document feed roller. SENSORS Document Sensor This detects the presence of a document in the feeder. Scan Line Sensor This detects when a page is approaching the auto shading position.

  • Page 15: Overall System Control

    OVERALL MACHINE INFORMATION November 30th, 1991 OVERALL SYSTEM CONTROL 1.4. OVERALL SYSTEM CONTROL Line Handset Scanner Scanner and Printer Drive Sensors Speaker Components and Sensors Operation Panel Modem AFE CONTROL SIGNALS Video Processing Thermal Memory Head RS-232C Port Video Interface (CCD) Processor DATA AND ADDRESS BUS...

  • Page 16: Video Data Path

    November 30th, 1991 OVERALL MACHINE INFORMATION VIDEO DATA PATH 1.5. VIDEO DATA PATH The following diagrams show the data path for this model. 1.5.1. Transmission Original Reference: Group 3 There is no pro- Facsimile grammable resis- Manual, tor in this model. section 1-3-1 Xenon Lamp...

  • Page 17: Power Distribution

    OVERALL MACHINE INFORMATION November 30th, 1991 POWER DISTRIBUTION 1.6. POWER DISTRIBUTION 1.6.1. Distribution Diagram Motors, ADF Clutch Xenon Lamp +24VD +24VS Thermal Head +24VD RS-232C Interface +12V +24VS Regulator +12V +24VD +24VS +24VD -12V Regulator - 5V - 12V Scanner Printer Sensors Sensors...

  • Page 18: Memory Back-Up Circuit

    November 30th, 1991 OVERALL MACHINE INFORMATION POWER DISTRIBUTION 1.6.2. Memory Back-up Circuit Switching Circuit Voltage 1-11 1-11 Detector Battery Switch Reference: Group 3 Real Time Facsimile Battery Clock Manual, section 1-4-3 (Circuit type 1) Memory Monitor +24V Switching Circuit Regulator Memory Battery The battery [A] on the MBU backs up the RAM on the MBU, which contains...

  • Page 19: Detailed Section Descriptions

    DETAILED SECTION DESCRIPTIONS November 30th, 1991 SCANNER 2. DETAILED SECTION DESCRIPTIONS 2.1. SCANNER 2.1.1. Mechanisms Scan Line Sensor 1. Document Detection ADF Clutch Trailing Edge Sensor Document Sensor Separation Plate Pick-up Roller Feed Separation Roller Roller • The machines in this series have an A4-width [8.3"] scanner. There is no document width detector.

  • Page 20: Pick-Up And Feed

    November 30th, 1991 DETAILED SECTION DESCRIPTIONS SCANNER 2. Pick-up and Feed Mechanism Reference: Group 3 Facsimile Manual, section 2-2 Tx Motor ADF Clutch • This machine uses an electrical clutch mechanism with trailing edge sen- sor. • There is no manual feed. Resolution Standard - The tx motor feeds the document at 7.7 lines/mm.

  • Page 21: Video Data Processing

    DETAILED SECTION DESCRIPTIONS November 30th, 1991 SCANNER 2.1.2. Video Data Processing Output from the CCD Auto Shading Memory WHITE WAVEFORM FEEDBACK Peak Hold Converter Amplifier Filter CORRECTED DATA Data Processing Circuits To the CPU VIDEO and Modem PROCESSOR Corrected Data from the Auto Shading Circuit Reference: Group 3 Error Facsimile Manual,...

  • Page 22: Printer

    November 30th, 1991 DETAILED SECTION DESCRIPTIONS PRINTER 2.2. PRINTER 2.2.1. Mechanisms 1. Paper Feed Mechanism One-way Clutch Feed-out Roller Platen Roller Reference: Group 3 Facsimile Manual, section 3-4-1 Rx Motor The printer is an A4-width [8.3"] printer. Resolution Standard - Each received line is printed 4 times Detail - Each received line is printed twice Fine - Each received line is printed once.

  • Page 23: Cutting

    DETAILED SECTION DESCRIPTIONS November 30th, 1991 PRINTER Jam Detection The cpu detects a copy jam if one of the following conditions occurs: • If the printer jam sensor still does not detect paper after the minimum copy length has been fed since the start of printing. •...

  • Page 24: Circuits

    November 30th, 1991 DETAILED SECTION DESCRIPTIONS PRINTER 2.2.2. Circuits 1. Video Data Processing • Smoothing is as described in section 3-5-1 of the Group 3 Facsimile Manual • There is no reduction. 2. Thermal Head Both machines use an A4-width [8.3"] thermal head. Refer to section 3-5-2 of the Group 3 Facsimile Manual for a circuit diagram.

  • Page 25: Pcbs And Their Functions

    DETAILED SECTION DESCRIPTIONS November 30th, 1991 PCBs AND THEIR FUNCTIONS 2.3. PCBs AND THEIR FUNCTIONS 2.3.1. FCU Line Handset Scanner Scanner and Printer Drive Sensors Speaker Components and Sensors Operation Panel Drivers Modem AFE CONTROL SIGNALS Video Processing Thermal Memory Head RS-232C Port...
  • Page 26 November 30th, 1991 DETAILED SECTION DESCRIPTIONS PCBs AND THEIR FUNCTIONS 1. CPU (AFSP) • 65C02 compatible microprocessor • Interrupt control • DMA control • Data compression and reconstruction (high speed MH coding for 4.5- second scanning) • Modem (digital operations) •...

  • Page 27: Mbu

    DETAILED SECTION DESCRIPTIONS November 30th, 1991 PCBs AND THEIR FUNCTIONS 2.3.2. MBU System DATA AND ADDRESS BUS Memory Back-up System Control To/From To/From 1. System ROM • Contains the software to run the machine 2. System RAM • 32k SRAM and 32k PSRAM for parameter storage, line buffer, FIFO, SAF memory administration The SRAM is backed up by the battery on the MBU...

  • Page 28: Sbu

    November 30th, 1991 DETAILED SECTION DESCRIPTIONS PCBs AND THEIR FUNCTIONS 2.3.3. SBU Analog Video Drive Clocks To the FCU From the FCU Drivers +12V Inverter +12V Amplifier Emitter Follower 2.3.4. OPU Operation Panel Operation Panel Keys LEDs LCD Panel Output Auxiliary Operation Operation Panel from the...

  • Page 29: Ncu

    DETAILED SECTION DESCRIPTIONS November 30th, 1991 PCBs AND THEIR FUNCTIONS 2.3.5. NCU Tx/Rx Data Di Switch To/From FCU Protection Circuit Network RING Line Current Detector Handset Ringing To FCU Signal Detector Auto Mode Relay Relay Answering Machine +24V From FCU Off-Hook Detector To FCU...

  • Page 30: Psu

    November 30th, 1991 DETAILED SECTION DESCRIPTIONS PCBs AND THEIR FUNCTIONS 2.3.6. PSU Surge Current LIVE Prevention Noise Surge Filter Prevention NEUTRAL Main Arrestor Switch GROUND Power Supply Generation Circuits +24VD +24VD +24VD -12V +24VS Activation Thermal Signal Head Overheat Protection in the PSU If the PSU thermistor temperature exceeds about 45 °C, the power supply outputs from the PSU are disabled.

  • Page 31: Installation

    INSTALLATION November 30th, 1991 CONNECTING UP THE MACHINE 3. INSTALLATION 3.1. CONNECTING UP THE MACHINE LINE...

  • Page 32: Initial Programming

    November 30th, 1991 INSTALLATION INITIAL PROGRAMMING 3.2. INITIAL PROGRAMMING Check the following: • Is the country code in the NCU parameters (Function 96, parameter 00) correct for the country of installation? In the USA, it should be 17. • Do any bit switch or other settings have to be changed to match line conditions or user requirements? •...

  • Page 33: Service Tables And Procedures

    SERVICE TABLES AND PROCEDURES November 30th, 1991 SERVICE LEVEL FUNCTIONS 4. SERVICE TABLES AND PROCEDURES 4.1. SERVICE LEVEL FUNCTIONS 4.1.1. Bit Switch Programming (Function 91) Function then immediately Yes FUNCTION Y/∇ 9 SERVICE FUNCTIONS DEFAULT: 0000 0000 BITSW 00: 0000 0000 Bit 7 is displayed at the left, and bit 0 at the right.

  • Page 34: Error Code Display (Function 93)

    November 30th, 1991 SERVICE TABLES AND PROCEDURES SERVICE LEVEL FUNCTIONS 4.1.3. Error Code Display (Function 93) Function then immediately Yes FUNCTION Y/∇ 9 SERVICE FUNCTIONS ERROR CODE # /∇ 1-01 JAN 01 17:30 3. Either: Scroll through the error codes - Finish - Function 4.1.4.

  • Page 35: Ram Display/Rewrite (Function 95)

    SERVICE TABLES AND PROCEDURES November 30th, 1991 SERVICE LEVEL FUNCTIONS 4.1.6. RAM Display/Rewrite (Function 95) Function then immediately Yes FUNCTION Y/∇ 9 SERVICE FUNCTIONS Y/∇ DISPLAY MEMORY ADDRESS = 2044C DATA = 03 4. Input the address that you wish to see. Example: Address 20202 ADDRESS = 20202 DATA = 00 Note: The first digit must always be 2.

  • Page 36: Ncu Parameters (Function 96)

    November 30th, 1991 SERVICE TABLES AND PROCEDURES SERVICE LEVEL FUNCTIONS 4.1.8. NCU Parameters (Function 96) Function then immediately Yes FUNCTION Y/∇ 9 SERVICE FUNCTIONS NCU PARAMETER KPAD/Y NO.00 3. Scroll through the parameters - Enter new values at the keypad. Example: Set NCU parameter 04 to 005.

  • Page 37: Xenon Lamp Test (Function 97)

    SERVICE TABLES AND PROCEDURES November 30th, 1991 SERVICE LEVEL FUNCTIONS 4.1.10. Xenon Lamp Test (Function 97) Function then immediately Yes FUNCTION Y/∇ 9 SERVICE FUNCTIONS SCN-1 DT-2 PL-3 LD-4 MDM-5 RI-6 CK-7 SN-8 SCANNER TEST KPAD ADF-1 LAMP-2 SCANNER LAMP TEST The xenon lamp lights up for 5 minutes.

  • Page 38: Printer Test Patterns (Function 97)

    November 30th, 1991 SERVICE TABLES AND PROCEDURES SERVICE LEVEL FUNCTIONS 8. The display is as shown opposite. SINGLE TONE PRESS KEYPAD Press the required key. 697 Hz 1209 Hz 5 770 Hz 1336 Hz 6 852 Hz 1477 Hz 7 941 Hz 1633 Hz 8 Example: To test 1633 Hz, press...

  • Page 39: Modem Test (Function 97)

    SERVICE TABLES AND PROCEDURES November 30th, 1991 SERVICE LEVEL FUNCTIONS 4.1.14. Modem Test (Function 97) Function then immediately Yes FUNCTION Y/∇ 9 SERVICE FUNCTIONS SCN-1 DT-2 PL-3 LD-4 MDM-5 RI-6 CK-7 SN-8 MODEM TEST G3-1 TONE-2 4. Either: Test G3 carrier signals - 1 .

  • Page 40: Ringer Test (Function 97)

    November 30th, 1991 SERVICE TABLES AND PROCEDURES SERVICE LEVEL FUNCTIONS 4.1.15. Ringer Test (Function 97) Not used; do not try to operate this func- tion. 4.1.16. Buzzer Test (Function 97) Function then immediately Yes FUNCTION Y/∇ 9 SERVICE FUNCTIONS SCN-1 DT-2 PL-3 LD-4 MDM-5 RI-6 CK-7 SN-8 Press the Stop key to stop the buzzer.

  • Page 41: Serial Number (Function 98)

    SERVICE TABLES AND PROCEDURES November 30th, 1991 SERVICE LEVEL FUNCTIONS 4.1.18. Serial Number (Function 98) Function then immediately Yes FUNCTION Y/∇ 9 SERVICE FUNCTIONS SERIAL # KPAD 3. Enter the machine’s serial number at the ten key pad. SERIAL # KPAD/Y/N 7940479186 To correct a mistake: No...

  • Page 42: Bypassing Restricted Access

    November 30th, 1991 SERVICE TABLES AND PROCEDURES SERVICE LEVEL FUNCTIONS 4.1.20. Bypassing Restricted Access Use this procedure if the user has switched on Restricted Access. This en- ables you to use the machine without having to input a Personal Code. It is also useful if the user cannot operate the machine because they cannot re- member any of the Personal Codes.

  • Page 43: Bit Switches

    SERVICE TABLES AND PROCEDURES November 30th, 1991 BIT SWITCHES 4.2. BIT SWITCHES WARNING Do not adjust a bit switch that is described as "Not used", as this may cause the machine to malfunction or to operate in a manner that is not accepted by local regulations. Such bits are for use only in other areas, such as Japan.
  • Page 44 November 30th, 1991 SERVICE TABLES AND PROCEDURES BIT SWITCHES Bit Switch 00 FUNCTION COMMENTS Communication This is a fault-finding aid. The LCD shows the key parameter display parameters (see the next page). This is normally disabled 0: Disabled because it cancels the CSI display for the user. 1: Enabled Make sure that you reset this bit after testing.
  • Page 45 SERVICE TABLES AND PROCEDURES November 30th, 1991 BIT SWITCHES Bit Switch 02 FUNCTION COMMENTS Not used Do not change the factory settings. Near-end indication When paper roll near-end has been detected, the 0: Disabled Replace Paper indicator blinks to warn the user. If 1: Enabled this bit is 1, this function is disabled.
  • Page 46 November 30th, 1991 SERVICE TABLES AND PROCEDURES BIT SWITCHES Bit Switch 04 FUNCTION COMMENTS Compression modes available in These bits determine what capabilities are receive mode informed to the transmitting side in the protocol Bit 1 Modes exchange. MH only MR or MH MR or MH, with MMR, MR, or...
  • Page 47 SERVICE TABLES AND PROCEDURES November 30th, 1991 BIT SWITCHES Bit Switch 05 FUNCTION COMMENTS Compression modes available in These bits determine what capabilities are transmit mode informed to the receiving side in the protocol Bit 1 Modes exchange. MH only MR or MH MR or MH, with MMR, MR, or...
  • Page 48 November 30th, 1991 SERVICE TABLES AND PROCEDURES BIT SWITCHES Bit Switch 07 FUNCTION COMMENTS Back to back test Set this bit to 1 when you wish to do a back - 0: Disabled to-back test. Note that this machine has 1: Enabled jumpers on the NCU for supplying line voltage during a back-to-back test.
  • Page 49 SERVICE TABLES AND PROCEDURES November 30th, 1991 BIT SWITCHES Bit Switch 09 (Transmission) FUNCTION COMMENTS CNG signal transmission in CNG (calling tone) is normally used by auto-dial fax manual transmission mode machines to alert a manual machine operator that 0: Disabled an auto-transmitting machine is on the line waiting 1: Enabled to transmit.
  • Page 50 November 30th, 1991 SERVICE TABLES AND PROCEDURES BIT SWITCHES Bit Switch 0A (Reception) FUNCTION COMMENTS Initial Rx modem rate The setting of these bits is used to inform Bit 2 Bit 1 Bit 0 Setting the sending machine of the initial starting 9,600 bps modem rate for the machine in receive 7,200 bps...
  • Page 51 SERVICE TABLES AND PROCEDURES November 30th, 1991 BIT SWITCHES Bit Switch 0D FUNCTION COMMENTS Not used Do not change the factory settings. Contents of the top line of the LCD 0: The telephone number being dialed is when handset mode is in use displayed.

  • Page 52: Ncu Parameters

    November 30th, 1991 SERVICE TABLES AND PROCEDURES NCU PARAMETERS 4.3. NCU PARAMETERS The following tables give the RAM addresses and units of calculation of the parameters that the machine uses for ringing signal detection and automatic dialing. The factory settings are also given. Most of these must be changed by RAM read/write (Function 95), but some can be changed using NCU Pa- rameter programming (Function 96);...
  • Page 53 SERVICE TABLES AND PROCEDURES November 30th, 1991 NCU PARAMETERS Address Function Unit Remarks 414D PABX dial tone upper frequency Hz (BCD) See Note 2. limit (HIGH) 414E PABX dial tone upper frequency limit (LOW) 414F PABX dial tone lower frequency limit (HIGH) 4150 PABX dial tone lower frequency...
  • Page 54 November 30th, 1991 SERVICE TABLES AND PROCEDURES NCU PARAMETERS Address Function Unit Remarks 4165 International dial tone upper Hz (BCD) See Note 2. frequency limit (HIGH) 4166 International dial tone upper frequency limit (LOW) 4167 International dial tone lower frequency limit (HIGH) 4168 International dial tone lower frequency limit (LOW)
  • Page 55 SERVICE TABLES AND PROCEDURES November 30th, 1991 NCU PARAMETERS Address Function Unit Remarks 417E Max. number of dials per station (not using memory) 417F Redial interval (not using memory) 1 min 4180 Interval between dialing to 2.56 s different stations 4181 Tx level from modem - dBm...
  • Page 56 November 30th, 1991 SERVICE TABLES AND PROCEDURES NCU PARAMETERS Notes 1. If a setting is not required, store FF in the address. 2. Tone frequencies are stored in BCD in the following format. Examples: a) 380 Hz HIGH 0 3 LOW 8 0 b) 1210 Hz HIGH 1 2 LOW 1 0 3.
  • Page 57 SERVICE TABLES AND PROCEDURES November 30th, 1991 NCU PARAMETERS On the following pages, there is a list of factory settings for those parameters that are programmed for the USA version of this machine. For each RAM address, there are two columns. •...
  • Page 58 November 30th, 1991 SERVICE TABLES AND PROCEDURES NCU PARAMETERS Ringback Tone Detection Parameters for Auto Select Reception Mode In Auto Select mode, the machine waits for CED if it receives a ringing signal. If it does not re- ceive CED, it rings the buzzer and sends a ringback tone back through the network to the transmitter.

  • Page 59: Dedicated Transmission Parameters

    SERVICE TABLES AND PROCEDURES November 30th, 1991 DEDICATED TRANSMISSION PARAMETERS 4.4. DEDICATED TRANSMISSION PARAMETERS Each Quick Dial Key and Speed Dial Code has three bytes of programmable parameters allocated to it. If transmissions to a particular machine often expe- rience problems, store that terminal’s fax number as a Quick Dial or Speed Dial, and adjust the parameters allocated to that number.

  • Page 60: Parameters

    November 30th, 1991 SERVICE TABLES AND PROCEDURES DEDICATED TRANSMISSION PARAMETERS 4.4.2. Parameters Byte 1 FUNCTION COMMENTS Initial Tx modem rate If training with a particular remote terminal Bit 1 Bit 0 Setting always takes too long, the initial modem rate 9,600 bps may be too high.
  • Page 61 SERVICE TABLES AND PROCEDURES November 30th, 1991 DEDICATED TRANSMISSION PARAMETERS Byte 2 FUNCTION COMMENTS Compression modes available in These bits determine the capabilities that are transmit mode informed to the other terminal during Bit 6 Modes transmission. MMR, MR, or MH MR or MH MH only MH only...

  • Page 62: Useful Ram Addresses

    November 30th, 1991 SERVICE TABLES AND PROCEDURES USEFUL RAM ADDRESSES 4.5. USEFUL RAM ADDRESSES 4044 Bit 0: Remote transfer 0: Enabled, 1: Disabled Bit 2: Forwarding 0: Enabled, 1: Disabled Bit 3: Authorized reception 0: Enabled, 1: Disabled Bit 4: Connection to answering machine 0: Enabled, 1: Disabled Bit 5: Remote control features 0: Enabled, 1: Disabled...

  • Page 63: Special Tools And Lubricants

    SERVICE TABLES AND PROCEDURES November 30th, 1991 SPECIAL TOOLS AND LUBRICANTS Factory Settings The factory settings of the above RAM addresses are shown below in hexa- decimal code. The first digit represents bits 7 to 4, and the second digit repre- sents bits 3 to 0.

  • Page 64: Replacement And Adjustment

    REPLACEMENT AND ADJUSTMENT November 30th, 1991 COVERS 5. REPLACEMENT AND ADJUSTMENT 5.1. COVERS 5.1.1. Top Cover [A] [A]: 4 screws 5.1.2. Front [B] and Rear [C] Covers [B]: 3 screws [C]: 5 screws, 1 washer Caution: Do not damage the cable at the front left side of the machine.

  • Page 65: Scanner

    November 30th, 1991 REPLACEMENT AND ADJUSTMENT SCANNER 5.2. SCANNER 5.2.1. ADF Clutch [B] and Pick-up [H] and Feed [I] Rollers [A]: 2 screws [B]: 1 E-ring [E]: 4 screws • First, remove the front and rear covers (see section 5-1). Reassembly •...

  • Page 66: Separation Roller

    REPLACEMENT AND ADJUSTMENT November 30th, 1991 SCANNER 5.2.2. Separation Roller [F] [B]: 2 screws (1 with ground) [C]: 1 screw [D]: 2 screws [E]: 4 screws [F]: 2 screws • When removing [A], lift it up by the part that hangs down just above the document feed area, and ease it off over the cover release button.

  • Page 67: Tx Motor

    November 30th, 1991 REPLACEMENT AND ADJUSTMENT SCANNER 5.2.3. Tx Motor [D] [A], [B]: 1 E-ring, 1 screw [C]: 2 screws [D]: 2 screws • First remove the top and rear covers (see section 5-1), the ADF clutch cover (see section 5-2-1, item [A]), and the thermal head (see section 5- 3-2).

  • Page 68: Xenon Lamp

    REPLACEMENT AND ADJUSTMENT November 30th, 1991 SCANNER 5.2.5. Xenon Lamp [F] [A]: 2 screws [B]: 4 screws [C]: 1 E-ring [D]: 1 E-ring, 1 bushing [E]: 2 screws • First remove the top and rear covers (see section 5-1), the ADF clutch (see section 5-2-1), and the lower ADF guide plate ([E] in section 5-2-2).

  • Page 69: Sbu

    November 30th, 1991 REPLACEMENT AND ADJUSTMENT SCANNER 5.2.7. SBU [B] [A]: 2 screws [B]: 2 screws • First, remove the top cover (see section 5-1). • After installing a new SBU, do the following adjustments, in sequential order. 5.2.8. SBU Adjustments Tools Required •...
  • Page 70 REPLACEMENT AND ADJUSTMENT November 30th, 1991 SCANNER Adjustments 1. White Level • Fit the adjustment knobs [A] through the slots in the SBU as shown. • Loosen the SBU securing screws [B]. • Remove any test charts that are on the exposure glass. •...
  • Page 71 November 30th, 1991 REPLACEMENT AND ADJUSTMENT SCANNER 3. Focusing (MTF) 0.2 V 0.5 ms • Place the 8 line/mm test pattern on the exposure glass. • Loosen the lens securing screw [A] (Allen screw). • Move the lens [B] back and forth until B is maximized (see the diagram on the right).
  • Page 72 REPLACEMENT AND ADJUSTMENT November 30th, 1991 SCANNER 5. Scan Line 0.2 V 0.5 ms • Place the scan line test chart [A] on the exposure glass as shown. • Loosen the SBU securing screws (see procedure 1). • Adjust the waveform with the adjusting knobs until the waveform is as shown on the right.

  • Page 73: Printer

    November 30th, 1991 REPLACEMENT AND ADJUSTMENT PRINTER 5.3. PRINTER 5.3.1. Rx Motor [D] [A]: 2 screws [B]: 2 screws [D]: 2 screws • First, remove the rear cover (see section 5-1), and the NCU and PSU (see section 5-4). 5.3.2. Thermal Head [C] [A]: 2 screws [B]: 1 screw Caution:...

  • Page 74: Cutter

    REPLACEMENT AND ADJUSTMENT November 30th, 1991 PRINTER 5.3.3. Cutter [C] [A]: 1 screw [B]: 2 screws [C]: 2 screws • First, remove the cover on the left side of the machine above the copy exit (2 screws). This allows the upper unit to be opened a little more than usual.

  • Page 75: Pcbs

    November 30th, 1991 REPLACEMENT AND ADJUSTMENT PCBs 5.4. PCBs 5.4.1. FCU [E] and Battery [F] [A]: 2 screws [B]: 2 screws [F]: 1 screw If possible, print a File List and all the messages stored in the memory before starting. Caution: Do not dislodge the jumper switch on the MBU board, or the machine will have to be reprogrammed.

  • Page 76: Mbu

    REPLACEMENT AND ADJUSTMENT November 30th, 1991 PCBs 5.4.3. MBU See the previous diagram; the MBU is item [D]. Before removal, do the following. • If possible, print all the user reports and give them to the user. • If possible, make a note of the user’s current on/off switch settings (Function 61) and ID codes (Function 52).

  • Page 77: Psu And Ncu

    November 30th, 1991 REPLACEMENT AND ADJUSTMENT PCBs 5.4.4. PSU [A] and NCU [B] [A], [B]: 4 screws • First, remove the rear cover (see section 5-1). Note: Do not touch the PSU components. They may be hot. 5.4.5. Operation Panel [B] [A], [B]: 3 screws 5-14...

  • Page 78: Troubleshooting

    TROUBLESHOOTING November 30th, 1991 COPY QUALITY TROUBLESHOOTING 6. TROUBLESHOOTING 6.1. COPY QUALITY TROUBLESHOOTING 6.1.1. Received Copies If there is no fault in the transmitting terminal or on the line, but the copy qual- ity is bad, either: • Check that the printer cover is closed properly. •...

  • Page 79: Mechanical Problems

    November 30th, 1991 TROUBLESHOOTING MECHANICAL PROBLEMS 6.2. MECHANICAL PROBLEMS If there is a mechanical problem that cannot be solved easily, try using the fol- lowing troubleshooting flow charts, while referring to the point-to-point dia- gram. The flow charts may not be comprehensive, but they may help you to find the problem.
  • Page 80 TROUBLESHOOTING November 30th, 1991 MECHANICAL PROBLEMS Symptom: Non feed Check Action if Yes Action if No 13. Are the connections be- Connect the cables properly. Go to step 14. tween the PSU and the ADF clutch loose? 14. Does the FCU send the Replace the ADF clutch.
  • Page 81 November 30th, 1991 TROUBLESHOOTING MECHANICAL PROBLEMS Symptom: Double feed Check Action if Yes Action if No 1. Is the problem solved by Finished Try cleaning or replacing the cleaning or lubricating separation plate. If that does the separation roller? not help, go to step 2. 2.

  • Page 82: Printer

    TROUBLESHOOTING November 30th, 1991 MECHANICAL PROBLEMS 6.2.2. Printer Symptom: Non feed Check Action if Yes Action if No 1. Is the printer jammed with Clear the debris. Go to step 2. debris? 2. Is the printer cover closed Go to step 3. Close the cover.
  • Page 83 November 30th, 1991 TROUBLESHOOTING MECHANICAL PROBLEMS Symptom: Jam Check Action if Yes Action if No 1. Is the printer jammed with Clear the debris. Go to step 2. debris? 2. Initialize the sensors. Is Go to step 5. Go to step 3. the printer jam sensor good? 3.

  • Page 84: Error Codes

    TROUBLESHOOTING November 30th, 1991 ERROR CODES 6.3. ERROR CODES If an error code occurs, retry the communication. If the same problem oc- curs, try to fix the problem as suggested below. Note that error codes 4-00, 01, 02, and 10 only appear in the error code display and on the service re- port.
  • Page 85 November 30th, 1991 TROUBLESHOOTING ERROR CODES Code Meaning Suggested Cause/Action 0-07 No post-message Check the line connection. response from the other Check the FCU - NCU connectors. end after a page was sent Replace the NCU or FCU. The other end may have jammed or run out of paper. The other end user may have disconnected the call.
  • Page 86 TROUBLESHOOTING November 30th, 1991 ERROR CODES Code Meaning Suggested Cause/Action 0-22 The signal from the other Check the line connection. end was interrupted for Check the FCU - NCU connectors. more than 0.2 s Replace the NCU or FCU. Defective remote terminal. Check for line noise or other line problems.
  • Page 87 November 30th, 1991 TROUBLESHOOTING ERROR CODES Code Meaning Suggested Cause/Action 1-71 The printer cover was Check whether the user opened the cover during opened during printing printing. Check the cover lock mechanism. Check the cover switch position and actuation. Check connections between the cover switch and the FCU.
  • Page 88 TROUBLESHOOTING November 30th, 1991 ERROR CODES Code Meaning Suggested Cause/Action 5-20 Storage impossible Temporary memory shortage; otherwise, replace the because of a lack of FCU or memory PCB. memory 5-21 Memory overflow 5-22 The memory filled up while the second or later page of a document was being scanned 5-23...
  • Page 89 November 30th, 1991 TROUBLESHOOTING ERROR CODES Code Meaning Suggested Cause/Action 9-61 The machine sent Check the paper feed path and printer for errors (if PIN/DCN because the substitute reception has occurred). memory filled up, even Make room in the memory, then ask the other end to though the mechanism resend the message.

  • Page 90: Electrical Component Defects

    TROUBLESHOOTING November 30th, 1991 ELECTRICAL COMPONENT DEFECTS 6.4. ELECTRICAL COMPONENT DEFECTS 6.4.1. Defective Sensor Table Sensor Symptoms if Defective Document sensor "TRANSMIT DIAL" is displayed at power- "READY SET DOCUMENT" is still displayed after a document is placed in the feeder.

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