Page 1 DP-420/PF-420 DF-420/JS-420 FAX System (R) SERVICE MANUAL Published in May 2009 3MZSM060 First Edition...
Page 2 CAUTION RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS. It may be illegal to dispose of this battery into the municipal waste stream. Check with your local solid waste officials for details in your area for proper disposal. ATTENTION IL Y A UN RISQUE D’EXPLOSION SI LA BATTERIE EST REMPLACEE PAR UN MODELE DE TYPE INCORRECT.
Page 3 Revision history Revision Date Replaced pages Remarks...
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Page 5: Safety Precautions
Safety precautions This booklet provides safety warnings and precautions for our service personnel to ensure the safety of their customers, their machines as well as themselves during maintenance activities. Service personnel are advised to read this booklet carefully to familiarize themselves with the warnings and precautions described here before engaging in maintenance activities.
Page 6 Safety warnings and precautions Various symbols are used to protect our service personnel and customers from physical danger and to prevent damage to their property. These symbols are described below: DANGER: High risk of serious bodily injury or death may result from insufficient attention to or incorrect compliance with warning messages using this symbol.
Page 7 1.Installation Precautions WARNING • Do not use a power supply with a voltage other than that specified. Avoid multiple connections to one outlet: they may cause fire or electric shock. When using an extension cable, always check that it is adequate for the rated current....................•...
Page 8: Specifications 1
2.Precautions for Maintenance WARNING • Always remove the power plug from the wall outlet before starting machine disassembly....• Always follow the procedures for maintenance described in the service manual and other related brochures............................• Under no circumstances attempt to bypass or disable safety features including safety mechanisms and protective circuits.
Page 9 • Do not remove the ozone filter, if any, from the copier except for routine replacement..... • Do not pull on the AC power cord or connector wires on high-voltage components when removing them; always hold the plug itself...................... •...
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Page 11 DP-420 First Edition...
Page 12: Table Of Contents
CONTENTS 1-1 Specifications 1-1-1 Specifications............................1-1-1 1-1-2 Parts names............................1-1-2 1-1-3 Machine cross section ..........................1-1-3 1-2 Installation 1-2-1 Installation environment ..........................1-2-1 1-2-2 Unpacking ...............................1-2-2 (1) Unpacking ............................1-2-2 (2) Removing the tapes and the spacer....................1-2-3 1-3 Maintenance Mode 1-3-1 Maintenance mode (operation panel is a 7-segment type)..............1-3-1 (1) Executing a maintenance item ......................1-3-1 (2) Maintenance mode item list.......................1-3-2 (3) Contents of maintenance mode items....................1-3-3...
Page 13 2-4 Appendixes List of maintenance parts........................2-4-1 Periodic maintenance procedures ......................2-4-2 Wiring diagram............................2-4-4...
Page 14: Specifications
1-1 Specifications 1-1-1 Specifications Type ..........Duplex sheet-through document feeder Original feed method ...... Automatic feed Original weight ........ Single-sided original mode: 45 to 160 g/m Double-sided original mode: 50 to 120 g/m Original type........Sheet originals Original size ........A3 to A5R/Ledger to StatementR Original No.
Page 15: Parts Names
1-1-2 Parts names Figure 1-1-1 Original table Original width guides Original eject table Document processor top cover Original stopper Cleaning cloth compartment 1-1-2...
Page 16: Machine Cross Section
1-1-3 Machine cross section Original path Figure 1-1-2 Machine cross section Original feed section Original conveying section Original switchback section 1-1-3...
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Page 18: Installation Environment
1-2 Installation 1-2-1 Installation environment Installation location (Be based on the machine establishment place.) Avoid direct sunlight or bright lighting. Ensure that the photoconductor will not be exposed to direct sunlight or other strong light when removing paper jams. Avoid locations subject to high temperature and high humidity or low temperature and low humidity; an abrupt change in the environmental temperature;...
Page 19: Unpacking
1-2-2 Unpacking (1) Unpacking Figure 1-2-1 Unpacking Document processor Plastic bag 17. Angle adjusting plate Outer case 10. Cleaning cloth 18. Plastic bag Inner case 11. Tray spacer 19. Installation guide Rear upper pad 12. Plastic bag 20. Film Rear lower pad 13.
Page 20: Removing The Tapes And The Spacer
(2) Removing the tapes and the spacer Procedure 1. Remove two tapes. Tape Tape Figure 1-2-2 2. Open the document processor top cover. Document processor 3. Raise the DP feed pulley unit. top cover 4. Open the spacer. Plastic bag Original table DP feed pulley unit 5.
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Page 22: Maintenance Mode
1-3 Maintenance Mode 1-3-1 Maintenance mode (operation panel is a 7-segment type) The machine is equipped with a maintenance function which can be used to maintain and service the machine. (1) Executing a maintenance item Start Enter “10871087” using Maintenance mode is entered. the numeric keys.
Page 23: Maintenance Mode Item List
(2) Maintenance mode item list Item Initial Section Content of maintenance item setting* General U019 Displaying the ROM version Optical U068 Adjusting the scanning position for originals from the DP U070 Adjusting the DP magnification U071 Adjusting the DP scanning timing 0/0/0/0 U072 Adjusting the DP center line...
Page 24: Contents Of Maintenance Mode Items
(3) Contents of maintenance mode items Maintenance Description item No. Displaying the ROM version U019 Description Displays the part number of the ROM fitted to each board. Purpose To check the part number or to decide if the ROM version is new from the last digit of the number. Method 1.
Page 25 Maintenance Description item No. Adjusting the scanning position for originals from the DP U068 Description Adjusts the position for scanning originals from the DP. Purpose Used when the image fogging occurs because the scanning position is not proper when the DP is used. Run U071 to adjust the timing of DP leading edge when the scanning position is changed.
Page 26 Maintenance Description item No. Adjusting the DP magnification U070 Description Adjusts the DP original scanning speed. Purpose Make the adjustment if the magnification is incorrect in the auxiliary scanning direction when the optional DP is used. Adjustment 1. Press the start key. 2.
Page 27 Maintenance Description item No. Adjusting the DP scanning timing U071 Description Adjusts the DP original scanning timing. Purpose Make the adjustment if there is a regular error between the leading or trailing edges of the original and the copy image when the optional DP is used. Method 1.
Page 28 Maintenance Description item No. Adjusting the DP center line U072 Description Adjusts the scanning start position for the DP original. Purpose Make the adjustment if there is a regular error between the centers of the original and the copy image when the optional DP is used.
Page 29 Maintenance Description item No. Adjusting the DP input light luminosity U074 Description Adjusts the luminosity of the exposure lamp for scanning originals from the DP. Purpose Used if the exposure amount differs significantly between when scanning an original on the platen and when scanning an original from the DP.
Page 30 Maintenance Description item No. Adjusting the DP automatically U076 Description Uses a specified original and automatically adjusts the following items in the DP scanning section. Adjusting the DP magnification (U070) Adjusting the DP scanning timing (U071) Adjusting the DP center line (U072) When you run this maintenance mode, the preset values of U070, U071 and U072 will also be updated.
Page 31 Maintenance Description item No. Setting DP reading position modification operation U087 Description The presence or absence of dust is determined by comparing the scan data of the original trailing edge and that taken after the original is conveyed past the DP original scanning position. If dust is identified, the DP original scanning position is adjusted for the following originals.
Page 32 Maintenance Description item No. Checking DP operation U203 Description Simulates the original conveying operation separately in the DP. Purpose To check the DP operation. Method 1. Press the start key. 2. Place an original on the DP if running this simulation with paper. 3.
Page 33 Maintenance Description item No. Checking the DP switches U244 Description Displays the status of the respective switches in the DP. Purpose To check if respective switches in the DP operate correctly. Method 1. Press the start key. 2. Turn each switch on and off manually to check the status. When the on-status of a switch is detected, the LEDs on the operation panel corresponding to the operated switch lights.
Page 34 Maintenance Description item No. Adjusting margins for scanning an original from the DP U404 Description Adjusts margins for scanning the original from the DP. Purpose Make the adjustment if margins are incorrect when the optional DP is used. Caution Before making this adjustment, ensure that the following adjustments have been made in maintenance mode. U402 U403 (See the service manual...
Page 35 Maintenance Description item No. Checking/clearing counts by optional devices U905 Description Displays the counts of DP or finisher. Purpose To check the use of DP and finisher. Method 1. Press the start key. 2. Select the count (group No.) to be checked using the image mode selection key. 3.
Page 36: Maintenance Mode (Operation Panel Is An Lcd Type)
1-3-2 Maintenance mode (operation panel is an LCD type) The machine is equipped with a maintenance function which can be used to maintain and service the machine. (1) Executing a maintenance item Start Enter 10871087 using Maintenance mode is entered. the numeric keys.
Page 37: Maintenance Mode Item List
(2) Maintenance mode item list Item Initial Section Content of maintenance item setting* General U019 Displaying the ROM version Optical U068 Adjusting the scanning position for originals from the DP U070 Adjusting the DP magnification U071 Adjusting the DP scanning timing 0/0/0/0 U072 Adjusting the DP center line...
Page 38: Contents Of Maintenance Mode Items
(3) Contents of maintenance mode items Maintenance Description item No. Displaying the ROM version U019 Description Displays the part number of the ROM fitted to each PWB. Purpose To check the part number or to decide, if the newest version of ROM is installed. Method 1.
Page 39 Maintenance Description item No. Adjusting the DP magnification U070 Description Adjusts the DP original scanning speed. Purpose Make the adjustment if the magnification is incorrect in the auxiliary scanning direction when the optional DP is used. Adjustment 1. Press the start key. 2.
Page 40 Maintenance Description item No. Adjusting the DP scanning timing U071 Description Adjusts the DP original scanning timing. Purpose Make the adjustment if there is a regular error between the leading or trailing edges of the original and the copy image when the optional DP is used. Method 1.
Page 41 Maintenance Description item No. Adjustment: Trailing edge registration U071 1. Select [TRAIL 1] or [TRAIL 2] using the cursor up/down keys. 2. Press the interrupt key. 3. Place an original on the DP and press the start key to make a test copy. 4.
Page 42 Maintenance Description item No. Adjusting the DP center line U072 Description Adjusts the scanning start position for the DP original. Purpose Make the adjustment if there is a regular error between the centers of the original and the copy image when the optional DP is used.
Page 43 Maintenance Description item No. Adjusting the DP input light luminosity U074 Description Adjusts the luminosity of the exposure lamp for scanning originals from the DP. Purpose Used if the exposure amount differs significantly between when scanning an original on the platen and when scanning an original from the DP.
Page 44 Maintenance Description item No. Executing DP automatic adjustment U076 Description Uses a specified original and automatically adjusts the following items in the DP scanning section. Adjusting the DP magnification (U070) Adjusting the DP scanning timing (U071) Adjusting the DP center line (U072) When you run this maintenance mode, the preset values of U070, U071 and U072 will also be updated.
Page 45 Maintenance Description item No. Setting DP reading position modification operation U087 Description The presence or absence of dust is determined by comparing the scan data of the original trailing edge and that taken after the original is conveyed past the DP original scanning position. If dust is identified, the DP original scanning position is adjusted for the following originals.
Page 46 Maintenance Description item No. Checking the operation of the DP motors U243 Description Turns the motors and solenoids in the DP on. Purpose To check the operation of the DP motors or solenoids. Method 1. Press the start key. 2. Select the item to be operated using the cursor up/down keys. 3.
Page 47 Maintenance Description item No. Setting the black line cleaning indication U326 Description Sets whether to display the cleaning guidance when detecting the black line. Purpose Displays the cleaning guidance in order to make the call for service with the black line decrease by the rubbish on the platen when scanning from the DP.
Page 48 Maintenance Description item No. Adjusting margins for scanning an original from the DP U404 Description Adjusts margins for scanning the original from the DP. Purpose Make the adjustment if margins are incorrect when the optional DP is used. Caution Before making this adjustment, ensure that the following adjustments have been made in maintenance mode. U402 U403 (See the service manual...
Page 49 Maintenance Description item No. Checking counts by optional devices U905 Description Displays the counts of DP or finisher. Purpose To check the use of DP and finisher. Method 1. Press the start key. 2. Select the device, the count of which is to be checked using the cursor up/down keys. 3.
Page 50: Original Misfeed Detection
1-4 Troubleshooting 1-4-1 Original misfeed detection (1) Original misfeed indication When an original jams, the machine immediately stops operation and a message is shown on the machine operation panel. To remove the jammed original, open the document processor top cover. To reset the original misfeed detection, open and close the document processor top cover.
Page 51 Section Jam code Conditions Specified time Document During primary feed of the second original in the simplex or processor No original feed duplex mode, even if retry operation is performed five times, primary original feed is not performed. During the secondary original feed in the simplex mode, DP 9900 pulses An original jam in the orig- timing switch (DPTSW) does not turn off within specified time...
Page 52: Paper Misfeeds
(3) Paper misfeeds Problem Causes/check procedures Corrective measures Defective original set Run maintenance item U244 and turn the original set switch on An original jams in switch. and off manually. Replace the switch if indication of the corre- DP is indicated dur- sponding switch is not light.
Page 53: Self-Diagnosis
1-4-2 Self-diagnosis (1) Self-diagnostic function (operation panel is a 7-segment type) When an unexpected error is detected for some reason, a system error (A call error) will be indicated. After a system error (A call error) is indicated, the error can be cleared by turning the main power switch off and then on. If a system error (A call error) occurs frequently, a fault may have occurred.
Page 54: Electric Problems
1-4-3 Electric problems Troubleshooting to each failure must be in the order of the numbered symptoms. Problem Causes Check procedures/corrective measures 1. Poor contact in the con- Reinsert the connector. Also check for continuity within the con- The original feed nector terminals.
Page 55: Mechanical Problems
1-4-4 Mechanical problems Problem Causes/check procedures Corrective measures The surfaces of the DP forwarding pulley, DP Check and clean them with isopropyl alcohol No primary original feed. feed pulley or DP separation pad are dirty if they are dirty. with paper powder. Check if the DP forwarding pulley or the DP Replace the pulley if it is deformed (see feed pulley is deformed.
Page 56: Assembly And Disassembly
1-5 Assembly and Disassembly 1-5-1 Precautions for assembly and disassembly (1) Precautions Before starting disassembly, press the Power key on the operation panel to off. Make sure that the Power lamp is off before turning off the main power switch. And then unplug the power cable from the wall outlet. Turning off the main power switch before pressing the power key to off may cause damage to the equipped hard disk.
Page 57: Original Feed Section
1-5-2 Original feed section (1) Detaching and refitting the DP forwarding pulley and DP feed pulley Follow the procedure below to clean or replace the DP forwarding pulley or DP feed pulley. Procedure Removing the DP forwarding pulley 1. Open the document processor top cover. Document processor 2.
Page 58 Removing the DP feed pulley 4. Remove the stop ring and two original feed guides of the DP feed pulley shaft. Groove When mounting the original feed guide, fit DP feed the projection of the original feed guide into pulley shaft the groove of the DP feed pulley shaft.
Page 59 6. Remove two stop rings and then remove DP DP feed pulley feed pulley shaft from the DP feed pulley unit. DP feed 7. Remove DP feed pulley from the DP feed pulley shaft pulley shaft. 8. Clean or replace the DP forwarding pulley and the DP feed pulley.
Page 60: Detaching And Refitting The Dp Separation Pad
(2) Detaching and refitting the DP separation pad Follow the procedure below to clean or replace the DP separation pad. Procedure 1. Remove the DP feed pulley unit. (see page DP separation pad 1-5-2) 2. Push the inserted parts of the DP separation pad and then remove the DP separation pad.
Page 61: Image Adjustment
1-5-3 Image adjustment (1) Adjusting the angle of leading edge Perform the following adjustment if the leading edge of the copy image is laterally skewed. Procedure 1. Place an original on the DP and press the 3 mm/4 mm 3 mm/4 mm start key to make a test copy.
Page 62 6. Remove the original mat. 7. Place the original mat with its hook and loop fasteners up over the platen. Align original mat corner that has 90 degrees of angle with the inner left corner of the original instruction panel. 8.
Page 63: Adjusting The Angle Of Trailing Edge
(2) Adjusting the angle of trailing edge Perform the following adjustment if the trailing edge of the copy image is laterally skewed. Procedure 1. Place an original on the DP and press the start key to make a test copy. 2.
Page 64 5. Adjust the height of DP. 1) Loosen the nut. 2) For copy example 1: Loosen the adjusting screw ( For copy example 2: Tighten the adjusting screw ( 3) Tighten the nut. 6. Refit the document processor rear cover. 3 mm/4 mm 3 mm/4 mm Copy...
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Page 66: Mechanical Construction
2-1 Mechanical construction 2-1-1 Mechanical construction The DP consists of the original feed section, original conveying section and original switchback section. The original feed section conveys an original set on the original table to the original conveying section in synchronization with original scanning of the scanner on the machine.
Page 67 DPMPWB ACT,RET YC7-2,3 B,A,_B,_A YC4-7,9,10,12 SBPSOL B,A,_B,_A YC3-1,3,4,6 OSBM B,A,_B,_A YC4-1,3,4,6 OSSW OSBSW TMG SW YC6-2 DPTSW SBFSSOL SET SW YC10-2 YC7-5 REV SW YC9-2 Figure 2-1-2 2-1-2...
Page 68: Operation Of Original Switchback
(1) Operation of original switchback In the double-sided original mode, after the first side of an original is scanned, the switchback feedshift guide is activated to switch the conveying path to the switchback tray side and the original is fed to the switchback tray. Then, the original is reversed by the reverse rotation of the original switchback motor (OSBM) and conveyed again to the original conveying section.
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Page 70: Electrical Parts Layout
2-2 Electrical Parts Layout 2-2-1 Electrical parts layout (1) PWBs Machine front Machine inside Machine rear Figure 2-2-1 PWBs DP main PWB (DPMPWB) ......Controls electrical components of the DP. 2-2-1...
Page 71: Switches And Sensors
(2) Switches and sensors Machine front Machine inside Machine rear Figure 2-2-2 Switches and sensors DP interlock switch (DPILSW) ..... Breaks the safety circuit when the document processor top cover is opened; resets original misfeed detection. Original set switch (OSSW) ......Detects the presence of an original. DP timing switch (DPTSW) ......
Page 72: Motors
(3) Motors Machine front Machine inside Machine rear Figure 2-2-3 Motors Original feed motor (OFM) ......Drives the original feed section. Original conveying motor (OCM) ....Drives the original conveying section. Original switchback motor (OSBM)....Drives the original switchback section. DP cooling fan motor (DPCFM) ....
Page 73: Solenoids
(4) Solenoids Machine front Machine inside Machine rear Figure 2-2-4 Solenoids Switchback feedshift solenoid (SBFSSOL) .. Operates the switchback feedshift guide. Switchback pressure solenoid (SBPSOL)..Operates the switchback pulley. 2-2-4...
Page 74: Dp Main Pwb
2-3 Operation of the PWBs 2-3-1 DP main PWB OSBM R24 V DPILSW Cover open detection Machine 24 V SBPSOL Motor Motor Motor driver driver driver SBFSSOL DPCFM EPWB EEPROM OSBSW DPTSW ORGVSYNC,SCLK, SDO,SDI,RDY,SEL Buffer OSSW OSWSW OSLSW DPMPWB DPOCSW DP main PWB block diagram Figure 2-3-1 2-3-1...
Page 75 YC12 Figure 2-3-2 DP main PWB silk-screen diagram 2-3-2...
Page 76 Connector Pin No. Signal Voltage Description Ground Connected 5 V DC 5 V DC supply to the Ground machine. 24 V DC 24 V DC supply 0/5 V DC (pulse) Serial communication data signal Connected 0/5 V DC (pulse) Serial communication data signal to the SCLK 0/5 V DC (pulse)
Page 77 Connector Pin No. Signal Voltage Description 24 V DC 24 V DC supply Connected 0/24 V DC SBPSOL (ACT): On/Offd to the 0/24 V DC SBPSOL (RET): On/Off switchback 24 V DC 24 V DC supply presser solenoid 0/24 V DC SBFSSOL: On/Off and switch- back feed-...
Page 78: List Of Maintenance Parts 2
2-4 Appendixes List of maintenance parts Maintenance part name Alternative Fig. Ref. Part No. part No. Name used in service man- Name used in parts list DP forwarding pulley PULLEY,LEADING FEED ADF 36211110 DP feed pulley PULLEY PAPER FEED 3BR07040 DP separation pad PAD SEPARATION 303K507060...
Page 79 Periodic maintenance procedures Maintenance Section Method Maintenance cycle Points and cautions Page part/location Test copy Perform at the maxi- Clean Every service. and test print mum copy size Maintenance Section Method Maintenance cycle Points and cautions Page part/location Original feed DP forwarding pulley Replace 150K...
Page 80 Maintenance Section Method Maintenance cycle Points and cautions Page part/location Covers Covers Clean Every service Clean with alcohol. Slit glass* Check or Every service Clean with a dry cloth (do not clean clean with a wet cloth or alco- hol). *: Equipped with the machine.
Page 81: Wiring Diagram 2
Wiring diagram 2-4-4...
Page 82 PF-420 First Edition...
Page 83 CONTENTS 1-1 Specifications 1-1-1 Specifications............................1-1-1 1-1-2 Parts names............................1-1-2 1-1-3 Machine cross section ..........................1-1-3 1-2 Installation 1-2-1 Installation environment ..........................1-2-1 1-2-2 Unpacking ...............................1-2-2 (1) Unpacking ............................1-2-2 (2) Remove the tapes and spacer ......................1-2-3 1-2-3 Installing the cassette heater (option) .....................1-2-4 1-3 Maintenance Mode 1-3-1 Maintenance mode (operation panel is a 7-segment type)..............1-3-1 (1) Executing a maintenance item ......................1-3-1 (2) Maintenance mode item list.......................1-3-2...
Page 84 2-4 Appendixes List of maintenance parts........................2-4-1 Periodic maintenance procedures ......................2-4-1 Wiring diagram............................2-4-2...
Page 85: Specifications
1-1 Specifications 1-1-1 Specifications Paper supply method...... Friction retard method Paper weight........64 to 105 g/m Paper types........Standard, recycled Paper size........A3, B4, A4, A4R, B5, B5R, A5R, Folio, Ledger, Legal, OficioII, Letter, LetterR, StatementR, 8K, 16K Paper capacity ........ 300 sheets (80 g/m Power source........
Page 86: Parts Names
1-1-2 Parts names Figure 1-1-1 Cassette Cassette left cover Paper width guides Paper length guide 1-1-2...
Page 87: Machine Cross Section
1-1-3 Machine cross section Paper path Figure 1-1-2 Machine cross section 1-1-3...
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Page 89: Installation Environment
1-2 Installation 1-2-1 Installation environment Installation location (Be based on the machine establishment place.) Avoid direct sunlight or bright lighting. Ensure that the photoconductor will not be exposed to direct sunlight or other strong light when removing paper jams. Avoid locations subject to high temperature and high humidity or low temperature and low humidity; an abrupt change in the environmental temperature;...
Page 90: Unpacking
1-2-2 Unpacking (1) Unpacking Figure 1-2-1 Unpacking Paper feeder 10. Cover labels Outer case 11. Plastic bag Bottom left pad 12. Screw M3 x 8 Bottom right pad 13. Screw M3 x 12 Top left pad 14. Connector cover Top right pad 15.
Page 91: Remove The Tapes And Spacer
(2) Remove the tapes and spacer Procedure Spacer 1. Remove two tapes. 2. Remove the spacer. Tape Tape Figure 1-2-2 3. Pull the cassette out and remove the tape. 4. Push the cassette back in. Tape Figure 1-2-3 1-2-3...
Page 92: Installing The Cassette Heater (Option)
1-2-3 Installing the cassette heater (option) Installing the cassette heater requires the following component: Cassette heater (P/N 303MH94060): for 220 to 240 V specifications only Cassette heater (P/N 303MH94050): for 120 V specifications One (1) M3 x 8 P tight screw (P/N 7BB202308H) Procedure 1.
Page 93 6. Connect the connector of the cassette heater cable to the connector of the machine. 7. Refit all the removed parts. Connector Cassette heater cable Figure 1-2-6 1-2-5...
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Page 95: Maintenance Mode
1-3 Maintenance Mode 1-3-1 Maintenance mode (operation panel is a 7-segment type) The machine is equipped with a maintenance function which can be used to maintain and service the machine. (1) Executing a maintenance item Start Enter “10871087” using Maintenance mode is entered. the numeric keys.
Page 96: Maintenance Mode Item List
(2) Maintenance mode item list Item Initial Section Content of maintenance item setting* General U019 Displaying the ROM version Drive, paper U030 Checking motor operation feed and U031 Checking switches for paper conveying paper convey- U032 Checking clutch operation ing system U034 Adjusting the print start timing Adjusting the leading edge registration...
Page 97: Contents Of Maintenance Mode Items
(3) Contents of maintenance mode items Maintenance Description item No. Displaying the ROM version U019 Description Displays the part number of the ROM fitted to each board. Purpose To check the part number or to decide if the ROM version is new from the last digit of the number. Method 1.
Page 98 Maintenance Description item No. Checking motor operation U030 Description Drives each motor. Purpose To check the operation of each motor. Method 1. Press the start key. 2. Select the motor to be operated using the exposure adjustment keys. Display Motor Drive motor (DM) is turned ON Drum motor (DRM) is turned ON Cassette drive motor 1 (CDM1) is turned ON...
Page 99 Maintenance Description item No. Checking clutch operation U032 Description Turns each clutch or solenoid on. Purpose To check the operation of each clutch or solenoid. Method 1. Press the start key. 2. Select the clutch or solenoid to be operated using the exposure adjustment keys. 3.
Page 100 Maintenance Description item No. Adjusting the print start timing U034 Description Adjusts the leading edge registration, center line or trailing edge margin. Purpose Make the adjustment if there is a regular error between the leading edges of the copy image and original. Make the adjustment if there is a regular error between the center lines of the copy image and original.
Page 101 Maintenance Description item No. U034 6. Press the start key. The value is set. (cont.) Caution Check the copy image after the adjustment. If the image is still incorrect, perform the following adjustments in maintenance mode. U066 U071 (See the service manual (See the service manual U034 for the machine.)
Page 102 Maintenance Description item No. Adjustment: trailing edge margin adjustment U034 1. Select group 3 using the image mode selection key. (cont.) Description Setting Initial Change in range setting value per step Trailing edge margin adjustment -4.0 to 10.0 0.1 mm 2.
Page 103 Maintenance Description item No. Adjusting the deflection in the paper U051 Description Adjusts the deflection in the paper. Purpose Make the adjustment if the leading edge of the copy image is missing or varies randomly, or if the copy paper is Z-folded.
Page 104 Maintenance Description item No. Performing fine adjustment of the motor speed U053 Description Performs fine adjustment of the speeds of the motors. Purpose Used to adjust the speed of the respective motors when the magnification is not correct. Also speed adjust- ment for each paper source can be performed in group 2.
Page 105 Maintenance Description item No. Specific paper feed location setting for printing function U341 Description Sets a paper feed location specified for printer output. Purpose To use a paper feed location only for printer output. A paper feed location specified for printer output cannot be used for copy output.
Page 106 Maintenance Description item No. Checking/clearing copy counts by paper feed locations U901 Description Displays or clears copy counts by paper feed locations. Purpose To check the time to replace consumable parts. Also to clear the counts after replacing the consumable parts. Method 1.
Page 107: Maintenance Mode (Operation Panel Is An Lcd Type)
1-3-2 Maintenance mode (operation panel is an LCD type) The machine is equipped with a maintenance function which can be used to maintain and service the machine. (1) Executing a maintenance item Start Enter 10871087 using Maintenance mode is entered. the numeric keys.
Page 108: Maintenance Mode Item List
(2) Maintenance mode item list Item Initial Section Content of maintenance item setting* General U019 Displaying the ROM version Drive, paper U030 Checking motor operation feed and U031 Checking switches for paper conveying paper convey- U032 Checking clutch operation ing system U034 Adjusting the print start timing Adjusting the leading edge registration...
Page 109: Contents Of Maintenance Mode Items
(3) Contents of maintenance mode items Maintenance Description item No. Displaying the ROM version U019 Description Displays the part number of the ROM fitted to each PWB. Purpose To check the part number or to decide, if the newest version of ROM is installed. Method 1.
Page 110 Maintenance Description item No. Checking switches for paper conveying U031 Description Displays the on-off status of each paper detection switch on the paper path. Purpose To check if the switches for paper conveying operate correctly. Method 1. Press the start key. 2.
Page 111 Maintenance Description item No. Adjusting the print start timing U034 Description Adjusts the leading edge registration or center line. Purpose Make the adjustment if there is a regular error between the leading edges of the copy image and original. Make the adjustment if there is a regular error between the center lines of the copy image and original. Make the adjustment if there is a regular error between the trailing edges of the copy image and original.
Page 112 Maintenance Description item No. Adjustment: Center line adjustment U034 1. Select the item to be adjusted using the cursor up/down keys. Display Description Setting Initial Change in range setting value per step LSU OUT Paper feed from cassette -7.0 to 10.0 -2.4 0.1 mm LSU BYP...
Page 113 Maintenance Description item No. Adjustment: Trailing edge margin adjustment U034 1. Select [MGN REAR]. Display Description Setting Initial Change in range setting value per step MGN REAR Trailing edge margin adjustment -4.0 to 10.0 0.1 ms 2. Press the interrupt key. 3.
Page 114 Maintenance Description item No. Adjusting the deflection in the paper U051 Description Adjusts the deflection in the paper. Purpose Make the adjustment if the leading edge of the copy image is missing or varies randomly, or if the copy paper is Z-folded.
Page 115 Maintenance Description item No. Setting the adjustment of the motor speed U053 Description Performs fine adjustment of the speeds of the motors. Purpose To adjust the speed of the respective motors when the magnification is not correct. Method 1. Press the start key. 2.
Page 116 Maintenance Description item No. Specific paper feed location setting for printing function U341 Description Sets a paper feed location specified for printer output. Purpose To use a paper feed location only for printer output. A paper feed location specified for printer output cannot be used for copy output. Setting 1.
Page 117: Paper Misfeed Detection
1-4 Troubleshooting 1-4-1 Paper misfeed detection (1) Paper misfeed indication When a paper misfeed occurs, the machine immediately stops copying and displays the jam location on the operation panel. Paper misfeed detection can be reset by opening and closing the cassette left cover to turn safety switch off and on. (2) Paper misfeed detection conditions CPFCL1 CFSW1...
Page 118 Section Description Conditions Specified time Paper The registration switch (RSW) does not turn on within the 2290 ms feed No paper feed from first specified time of cassette paper paper feed clutch 1 section paper feeder (CPFCL1) turning on and cannot be detected at the same timing even after retry.
Page 119: Paper Misfeeds
(3) Paper misfeeds Problem Causes/check procedures Corrective measures Paper is extremely curled. Change the paper. A paper jam in the Check if the paper feed pul- Check visually and replace any deformed pulley. paper feed section is ley, separation pulley or for- indicated during warding pulley is deformed.
Page 120 Problem Causes/check procedures Corrective measures Broken registration switch, Check visually and replace switch. A paper jam in the cassette feed switch 1 or 2 paper feed section is actuator. indicated during Defective switch. Run maintenance item U031 and turn switch on and off manually. copying (misfeed in Replace the switch if indication of the corresponding switch is not vertical paper con-...
Page 121 Problem Causes/check procedures Corrective measures Deformed guides along the Check visually and replace. A paper jam in the paper conveying path. paper feed section is Broken cassette feed Check visually and replace switch. indicated during switch 1 actuator. copying (multiple sheets in second Defective cassette feed Run maintenance item U031 and turn cassette feed switch 1 on...
Page 122: Self-Diagnosis
1-4-2 Self-diagnosis (1) Self-diagnostic function (operation panel is a 7-segment type) When an unexpected error is detected for some reason, a system error (A call error) will be indicated. After a system error (A call error) is indicated, the error can be cleared by turning the main power switch off and then on. If a system error (A call error) occurs frequently, a fault may have occurred.
Page 123: Self-Diagnostic Function (Operation Panel Is An Lcd Type)
(3) Self-diagnostic function (operation panel is an LCD type) When an unexpected error is detected for some reason, a system error will be indicated. After a system error is indicated, the error can be cleared by turning the main power switch off and then on. If the error is detected continuously, however, perform the operation shown in Table 1-4-1.
Page 124: Image Formation Problems
1-4-3 Image formation problems (1) The leading edge of the image is consistently misaligned with the original. Copy example Causes Check procedures/corrective measures Misadjusted leading edge registration. Run maintenance mode U034 to readjust the leading edge registration (see page 1-3-6, 17). (2) The leading edge of the image is sporadically misaligned with the original.
Page 125: Electric Problems
1-4-4 Electric problems Troubleshooting to each failure must be in the order of the numbered symptoms. Problem Causes Check procedures/corrective measures 1. Poor contact in the con- Reinsert the connector. Also check for continuity within the con- The paper feeder nector terminals.
Page 126 Problem Causes Check procedures/corrective measures 1. Poor contact in the con- Reinsert the connector. Also check for continuity within the con- The message nector terminals of cas- nector cable. If none, remedy or replace the cable. requesting cover to sette left cover safety be closed is dis- switch.
Page 127: Mechanical Problems
1-4-5 Mechanical problems Problem Causes/check procedures Corrective measures Check if the surfaces of the following rollers or Clean with isopropyl alcohol. No primary paper feed. pulleys are dirty with paper powder: cassette forwarding pulley, cassette paper feed pulley, cassette separation pulley, feed roller and feed pulley.
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Page 129: Precautions For Assembly And Disassembly
1-5 Assembly and Disassembly 1-5-1 Precautions for assembly and disassembly (1) Precautions Before starting disassembly, press the Power key on the operation panel to off. Make sure that the Power lamp is off before turning off the main power switch. And then unplug the power cable from the wall outlet. Turning off the main power switch before pressing the power key to off may cause damage to the equipped hard disk.
Page 130: Paper Feed Section
1-5-2 Paper feed section (1) Detaching and refitting the feed roller Follow the procedure below to replace the feed roller. Procedure 1. Open the cassette left cover. 2. Remove the stop ring from rear side of the Stop ring feed roller and slide the bush toward the inside.
Page 131: Detaching And Refitting The Cassette Separation Pulley
(2) Detaching and refitting the cassette separation pulley Follow the procedure below to replace the cassette separation pulley. Procedure 1. Pull out the cassette. 2. Remove the screw and remove the lower paper feed unit. Screw Lower paper feed unit Figure 1-5-3 3.
Page 132 4. Remove the separation pulley shaft from the separation pulley unit. 5. Remove the cassette separation pulley from the separation pulley shaft. 6. Replace the cassette separation pulley and refit all the removed parts. Separation pulley shaft Cassette separation pulley Figure 1-5-5 1-5-4...
Page 133: Detaching And Refitting The Cassette Forwarding Pulley And Cassette Paper Feed Pulley
(3) Detaching and refitting the cassette forwarding pulley and cassette paper feed pulley Follow the procedure below to replace the cassette forwarding pulley and cassette paper feed pulley. Procedure 1. Remove the feed roller (see 1-5-2). 2. Remove the lower paper feed unit (see 1-5- 3.
Page 134 7. Remove the screw and remove the upper paper feed unit. Upper paper feed unit Screw Figure 1-5-8 8. Remove the springs, stop ring and bush and Shaft holder then remove the shaft holder from the upper paper feed unit. Spring Bush Spring...
Page 135 9. Remove the cassette forwarding pulley from Cassette paper feed pulley the upper paper feed unit. 10. Remove the paper feed pulley shaft from the upper paper feed unit. Collar 11. Remove the collar and the cassette paper feed pulley from the upper paper feed shaft. 12.
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Page 137: Mechanical Construction
2-1 Mechanical Construction 2-1-1 Mechanical construction The paper feeder feeds paper from either of its cassette to the machine. Cassette can hold up to 300 (80 g/m ) sheets of paper. Paper is fed from the cassette by the rotation of the cassette for- warding pulley and cassette paper feed pulley.
Page 138 CPFCL CPSW CFSW CPWSW CPLSW SIZEB,SIZEC,SIZED EPWB CMPWB Figure 2-1-2 Paper feeder block diagram 2-1-2...
Page 139: Electrical Parts Layout
2-2 Electrical Parts Layout 2-2-1 Electrical parts layout (1) PWBs Machine front Machine inside Machine rear Figure 2-2-1 PWBs Cassette main PWB (CMPWB)....Controls electrical components of the paper feeder. Cassette heater PWB (CHPWB)....Relays the cassette heater power. 2-2-1...
Page 140: Switches And Sensors
(2) Switches and sensors Machine front Machine inside Machine rear Figure 2-2-2 Switches and sensors Cassette left cover safety switch (CLCSSW) ........... Breaks the safety circuit when the cassette left cover is opened. Cassette feed switch (CFSW)...... Detects a paper misfeed. Cassette paper switch (CPSW) ....
Page 141: Others
(3) Others Machine front Machine inside Machine rear Figure 2-2-3 Others Cassette drive motor (CDM) ......Drives the paper feeder. Cassette paper feed clutch (CPFCL) ... Primary paper feed from the cassette. Cassette heater (CH) ........Dehumidifies the cassette section. *: Option 2-2-3...
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Page 143: Cassette Main Pwb
2-3 Operation of the PWBs 2-3-1 Cassette main PWB Figure 2-3-1 Cassette main PWB silk-screen diagram 2-3-1...
Page 144 Connector Pin No. Signal Voltage Description 24 V DC 24 V DC power output to paper feeder Connected PGND Ground to the paper feeder +24V1 24 V DC 24 V DC power input from EPWB Connected PGND Ground to the engine PWB Not used Connected...
Page 145 Connector Pin No. Signal Voltage Description SGND Ground Connected 0/5 V DC CPSW: On/Off to the cas- 5 V DC 5 V DC power output to CPSW sette paper Not used switch SGND Ground Connected FEED 0/5 V DC CFSW: On/Off to the cas- 5 V DC 5 V DC power output to CFSW...
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Page 147 2-4 Appendixes List of maintenance parts Maintenance part name Alternative Fig. Ref. Part No. part No. Name used in service manual Name used in parts list Cassette paper feed pulley PULLEY,PAPER FEED 2AR07220 Cassette separation pulley PULLEY,SEPARATION 2AR07230 Cassette forwarding pulley PULLEY,LEADING FEED 2AR07240 Feed roller...
Page 148 Wiring diagram 2-4-2...
Page 149 DF-420 First Edition...
Page 150: Specifications 1
CONTENTS 1-1 Specifications 1-1-1 Specifications............................1-1-1 1-1-2 Parts names............................1-1-2 1-1-3 Machine cross section ..........................1-1-3 1-2 Installation 1-2-1 Installation environment ..........................1-2-1 1-2-2 Unpacking ...............................1-2-2 (1) Unpacking ............................1-2-2 (2) Remove the tapes ..........................1-2-3 1-3 Maintenance Mode 1-3-1 Maintenance mode ..........................1-3-1 (1) Executing a maintenance item ......................1-3-1 (2) Maintenance mode item list.......................1-3-2 (3) Contents of the maintenance mode items..................1-3-3 1-4 Troubleshooting...
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Page 152: Specifications
1-1 Specifications 1-1-1 Specifications Type ..........Built-in Number of trays ......1 tray Paper weight........60 to 105 g/m Maximum sheets (Not stapling) ..A3, B4, Ledger, Legal, Folio, OfficioII, 8K: 250 sheets A4, A4R, B5, Letter, LetterR, 16K: 500 sheets Muximum sheets for stapling ..
Page 153: Parts Names
1-1-2 Parts names Figure 1-1-1 Ejected paper guide extension Finisher tray Ejected paper guide Process table Finisher tray extension JAM release lever Staple 1-1-2...
Page 154: Machine Cross Section
1-1-3 Machine cross section Paper path Figure 1-1-2 Machine cross section Paper conveying section Process table section Eject section 1-1-3...
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Page 156: Installation Environment
1-2 Installation 1-2-1 Installation environment Installation location (Be based on the machine establishment place.) Avoid direct sunlight or bright lighting. Ensure that the photoconductor will not be exposed to direct sunlight or other strong light when removing paper jams. Avoid locations subject to high temperature and high humidity or low temperature and low humidity; an abrupt change in the environmental temperature;...
Page 157: Unpacking
1-2-2 Unpacking (1) Unpacking Figure 1-2-1 Unpacking Paper conveying unit 10. Sub staple cover 19. Tray left pad Outer case 11. Front eject cover 20. Tray right pad Finisher bottom pad 12. Rear eject cover 21. Plastic sheet Spacer A 13.
Page 158: Remove The Tapes
(2) Remove the tapes Procedure 1. Remove two tapes from the finisher tray. Tape Finisher tray Tape Figure 1-2-2 2. Remove the tape from the paper conveying unit. Tape Paper conveying unit Figure 1-2-3 1-2-3...
Page 159 3. Remove the tape from the process table. Process table Tape Figure 1-2-4 1-2-4...
Page 160: Maintenance Mode
1-3 Maintenance Mode 1-3-1 Maintenance mode The machine is equipped with a maintenance function which can be used to maintain and service the machine. (1) Executing a maintenance item Start Enter 10871087 using Maintenance mode is entered. the numeric keys. Enter the maintenance item number using the cursor up/down keys The maintenance item is...
Page 161: Maintenance Mode Item List
(2) Maintenance mode item list Item Initial Section Content of maintenance item setting* General U019 Displaying the ROM version Drive, paper U053 Setting the adjustment of the motor speed 0.3/0.7/-0.5/0.0/-0.1 feed and -0.1/-0.3/0.0/0.0/0.5/0.0 paper convey- ing system Operation U246 Setting the finisher 4/4/4 panel and support...
Page 162: Contents Of The Maintenance Mode Items
(3) Contents of the maintenance mode items Maintenance Description item No. Displaying the ROM version U019 Description Displays the part number of the ROM fitted to each PWB. Purpose To check the part number or to decide, if the newest version of ROM is installed. Method 1.
Page 163 Maintenance Description item No. Setting the adjustment of the motor speed U053 Description Performs fine adjustment of the speeds of the motors. Purpose To adjust the speed of the respective motors when the magnification is not correct. Method 1. Press the start key. 2.
Page 164 Maintenance Description item No. Setting the finisher U246 Description Provides various settings for the built-in finisher, if furnished. Purpose Adjusts the side registration cursor stop position if paper registration is poor or stapling is made outside the specified area. Setting 1.
Page 165 Maintenance Description item No. Checking counts by optional devices U905 Description Displays the counts of DP or finisher. Purpose To check the use of DP and finisher. Method 1. Press the start key. 2. Select the device, the count of which is to be checked using the cursor up/down keys. 3.
Page 166: Paper Misfeed Detection
1-4 Troubleshooting 1-4-1 Paper misfeed detection (1) Paper misfeed indication When paper jams, the machine immediately stops operation and the occurrence of a paper jam is indicated on the opera- tion panel. To remove the jammed paper, lower the process table. To reset the paper misfeed detection, detach and refit the process table to turn the tray open/close switch off and on.
Page 167: Paper Misfeeds
(3) Paper misfeeds Problem Causes/check procedures Corrective measures A piece of paper torn from Check visually and remove it, if any. A paper jam in built- copy paper is caught in finisher is indicated around the paper conveying as soon as the main switch.
Page 168: Self-Diagnosis
1-4-2 Self-diagnosis (1) Self-diagnostic function This unit is equipped with a self-diagnostic function. When a problem is detected, copying is disabled and the problem dis- played as a code consisting of C followed by a number, indicating the nature of the problem. A message is also displayed requesting the user to call for service.
Page 169 Remarks Code Contents Causes Check procedures/corrective measures C8190 Built-in finisher trailing edge registra- The trailing edge Reinsert the connector. Also check for conti- tion motor problem registration motor nuity within the connector cable. If none, When the trailing edge registration connector makes remedy or replace the cable.
Page 170: Electric Problems
1-4-3 Electric problems Troubleshooting to each failure must be in the order of the numbered symptoms. Problem Causes Check procedures/corrective measures 1. Poor contact in the con- Reinsert the connector. Also check for continuity within the con- The paper convey- nector terminals.
Page 171: Mechanical Problems
1-4-4 Mechanical problems Problem Causes/check procedures Corrective measures Check if the contact between the feedshift Check and remedy. Paper jams. roller and feedshift pulleys is correct. Check if the contact between the feedshift Check and remedy. roller and press roller is correct. Check if the contact between the eject roller Check and remedy.
Page 172: Precautions For Assembly And Disassembly
1-5 Assembly and Disassembly 1-5-1 Precautions for assembly and disassembly (1) Precautions Before starting disassembly, press the Power key on the operation panel to off. Make sure that the Power lamp is off before turning off the main power switch. And then unplug the power cable from the wall outlet. Turning off the main power switch before pressing the power key to off may cause damage to the equipped hard disk.
Page 173: Adjusting The Positions Of The Front Side Registration Cursor, Rear Side Registration Cursor And Trailing Edge Registration Cursor (Reference)
(2) Adjusting the positions of the front side registration cursor, rear side registration cursor and trailing edge registration cursor (reference) Perform the following adjustment if paper registration is poor or stapling is made outside the specified area. Procedure Start Staple 5 ±...
Page 174: Adjusting The Pressure Of Curl Eliminator Mechanism
(3) Adjusting the pressure of curl eliminator mechanism Increase the pressure of the curl eliminator mechanism to reduce upward curling of paper stacked on the process table if a paper jam occurs when batch ejection is performed because of strong upward curling. Procedure 1.
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Page 176: Construction Of Each Section
2-1 Mechanical construction 2-1-1 Construction of each section The paper conveying section consists of the components shown in Figure 2-1-1. It switches the path for the paper con- veyed from the machine in sort mode. Also the paper conveying section contains a curl eliminator mechanism, which reduces curling of paper with curl eliminator rollers.
Page 177: Paper Conveying Operation In Sort Mode
(1) Paper conveying operation in sort mode In the sort mode, the feedshift solenoid (FSSOL) turns on and the feedshift guide of the machine operates to switch the paper path to the paper conveying unit. After curling of the conveyed paper is eliminated by the curl eliminator rollers, the paper is conveyed to the process table by the feedshift roller.
Page 178: Process Table Section
2-1-2 Process table section The process table section consists of the components shown in Figure 2-1-4. It stores and evens up the paper conveyed from the paper conveying section and returns the stack of paper to the paper conveying section. Rear side registration cursor Process table...
Page 179: Paper Registration On The Process Table
(1) Paper registration on the process table In sort mode, the front and rear side registration cursors move to the size of the paper used to even up the sides of the stack of paper and the trailing edge registration cursor shifts the paper to the paper conveying section. In staple-sort mode, the front and rear side registration cursors even up the sides of the stack of paper and shift the stack toward the machine front, and then the trailing edge registration cursor shifts the stack to the stapling position.
Page 180: Stapler Section
2-1-3 Stapler section In staple-sort mode, paper stocked on the process table is stapled by the stapler. The stapler motor (STM) drives the stapler cam via the stapler drive gear to staple paper. Stapler motor Stapler drive gear Stapler cam Stapler self-priming sensor Stapler cam...
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Page 182: Electrical Parts Layout
2-2 Electrical Parts Layout 2-2-1 Electrical parts layout (1) Paper conveying section Machine front Machine inside Machine rear Figure 2-2-1 Paper conveying section Paper conveying motor (PCM)..... Drives the paper conveying section. Paper conveying switch (PCSW) ....Detects a paper jam in the finisher. Feedshift solenoid (FSSOL)......
Page 183: Process Table Section
(2) Process table section Machine front Machine inside Machine rear Figure 2-2-2 Process table section Finisher control PWB (FINPWB)....Controls electrical components. Process table sensor (PTS) ......Detects the presence of paper on the process table. Trailing edge registration motor (TERM)..Drives the trailing edge registration cursor. Front side registration motor (FSRM) ..
Page 184: Stapler Section
(3) Stapler section Machine front Machine inside Machine rear Figure 2-2-3 Stapler section Stapler empty sensor (STES) ...... Detects the presence of staples. Staple cartridge sensor (STCS) ....Detects the presence of the staple cartridge. Stapler home position sensor (STHPS) ..Detects the stapler in the home position. Stapler self-priming sensor (STSPS) ...
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Page 186: Finisher Control Pwb
2-3 Operation of the PWBs 2-3-1 Finisher control PWB FINPWB Paper conveying unit FSSOL ACT/RET FSSOL PUSOL PUSOL Driver circuit DF SEL DF RDY PCSW PCSW Machine Stepping motor driver circuit TOCSW SCLK TOCSW STES, STCS, STHPS, STSPS Sensors Serial communication Motor driver circuit...
Page 187 Figure 2-3-2 Finisher control PWB silk-screen diagram 2-3-2...
Page 188 Connector Pin No. Signal Voltage Description 24 V DC 24 V DC power input from EPWB Connected 24 V DC 24 V DC power input from EPWB to the PGND Ground machine PGND Ground 5 V DC 5 V DC power input from EPWB SGND Ground DF SEL...
Page 189 Connector Pin No. Signal Voltage Description TRAY 5V 5 V DC 5 V DC power output to PTS Connected TRAY 0/5 V DC PTS: On/Off to process TRAY GND Ground table sen- FJHP 5V 5 V DC 5 V DC power output to SRFHPS sor and side registration FJ HP...
Page 190: Maintenance Parts List
2-4 Appendixes Maintenance parts list Maintenance part name Alternative Fig. Ref. Part No. part No. Name used in service manual Name used in parts list Process table Upper curl eliminator roller UPPER ROLLER DECURLER 3HP08110 Lower curl eliminator roller ROLLER DECURLER 303HP08101 3HP08101 Eject roller...
Page 191: Wiring Diagram
Wiring diagram 2-4-2...
Page 192 JS-420 First Edition...
Page 193 CONTENTS 1-1 Specifications 1-1-1 Specifications............................1-1-1 1-1-2 Parts names............................1-1-2 1-1-3 Machine cross section ..........................1-1-3 1-2 Installation 1-2-1 Installation environment ..........................1-2-1 1-2-2 Unpacking ...............................1-2-2 1-3 Maintenance Mode 1-3-1 Maintenance mode ..........................1-3-1 (1) Executing a maintenance item ......................1-3-1 (2) Maintenance mode item list.......................1-3-2 (3) Contents of the maintenance mode items..................1-3-3 1-4 Troubleshooting 1-4-1 Paper misfeed detection .........................1-4-1...
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Page 195: Specifications
1-1 Specifications 1-1-1 Specifications Type ..........Enclosed Number of trays ......1 tray Paper weight........45 to 160 g/m Paper type ........Plain, Recycled Paper size........A3, B4, A4, A4R, B5, B5R, A5R, Folio, Ledger, Legal, Letter, LetterR, StatementR, OficioII Tray capacity........
Page 196: Parts Names
1-1-2 Parts names Figure 1-1-1 Job separator tray 1-1-2...
Page 197: Machine Cross Section
1-1-3 Machine cross section Paper path Figure 1-1-2 Machine cross section 1-1-3...
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Page 199: Installation Environment
1-2 Installation 1-2-1 Installation environment Installation location (Be based on the machine establishment place.) Avoid direct sunlight or bright lighting. Ensure that the photoconductor will not be exposed to direct sunlight or other strong light when removing paper jams. Avoid locations subject to high temperature and high humidity or low temperature and low humidity; an abrupt change in the environmental temperature;...
Page 200: Unpacking
1-2-2 Unpacking Figure 1-2-1 Unpacking Job separator 10. Left front cover Job separator tray 11. Plastic bag Outer case 12. M3 x 8 screw Front pad 13. Small pin Rear pad 14. Large pin Plastic bag 15. Tray holder Plastic bag 16.
Page 201: Maintenance Mode
1-3 Maintenance Mode 1-3-1 Maintenance mode The machine is equipped with a maintenance function which can be used to maintain and service the machine. (1) Executing a maintenance item Start Enter 10871087 using Maintenance mode is entered. the numeric keys. Enter the maintenance item number using the cursor up/down keys The maintenance item is...
Page 202: Maintenance Mode Item List
(2) Maintenance mode item list Item Initial Section Content of maintenance item setting* Drive, paper U031 Checking switches for paper conveying feed and paper convey- ing system Operation U233 Limiting job separator output MODE0 panel and support equipment Mode setting U342 Setting the ejection restriction *1,*2...
Page 203: Contents Of The Maintenance Mode Items
(3) Contents of the maintenance mode items Maintenance Description item No. Checking switches for paper conveying U031 Description Displays the on-off status of each paper detection switch on the paper path. Purpose To check if the switches for paper conveying operate correctly. Method 1.
Page 204 Maintenance Description item No. Setting the ejection restriction U342 Description Sets or cancels the restriction on the number of sheets to be ejected continuously when the internal eject tray is selected as the eject location. Purpose According to user request, sets or cancels restriction on the number of sheets. Setting 1.
Page 205: Paper Misfeed Detection
1-4 Troubleshooting 1-4-1 Paper misfeed detection (1) Paper misfeed indication When paper jams, the machine immediately stops operation and the occurrence of a paper jam is indicated on the opera- tion panel. To remove the jammed paper, open the left cover of the machine. To reset the paper misfeed detection, open and close the left cover to turn safety switch off and on.
Page 206: Paper Misfeeds
(3) Paper misfeeds Problem Causes/check procedures Corrective measures A piece of paper torn from Check visually and remove it, if any. Paper jams when the paper is caught around main power switch is feedshift switch or job eject turned on. switch.
Page 207: Electric Problems
1-4-2 Electric problems Troubleshooting to each failure must be in the order of the numbered symptoms. Problem Causes Check procedures/corrective measures 1. Poor contact in the con- Reinsert the connector. Also check for continuity within the con- The feedshift sole- nector terminals.
Page 208: Mechanical Problems
1-4-3 Mechanical problems Problem Causes/check procedures Corrective measures Check if the contact between the job eject pul- Check and remedy. Paper jams. leys and job eject roller is correct. Check if the job eject pulleys, job eject roller Grease the bushings and gears. Abnormal noise is heard.
Page 209: Construction Of Each Section
2-1 Mechanical construction 2-1-1 Construction of each section The job separator consists of the components shown in Figure 2-1-1. It switches the paper path to eject printed paper to the job separator tray. Figure 2-1-1 Job separator Job eject roller Job eject pulleys Job separator tray Feedshift lever...
Page 210: Switching The Paper Path
(1) Switching the paper path If the job separator is selected for the eject location, when a print is made, the feedshift solenoid (FSSOL) turns on and the feedshift guide of the machine operates to switch the paper path to the job separator. The printed paper is conveyed to the job separator and then ejected to the job separator tray.
Page 211: Electrical Parts Layout
2-2 Electrical Parts Layout 2-2-1 Electrical parts layout Machine front Machine inside Machine rear Figure 2-2-1 Job eject switch (JBESW)......Detects a paper jam in the job separator. Ejected paper detection switch (EPDSW)..Detects the presence of paper on the job separator tray. Feedshift solenoid (FSSOL)......
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Page 213: Maintenance Parts List
2-3 Appendixes Maintenance parts list Maintenance part name Alternative Fig. Ref. Part No. part No. Name used in service manual Name used in parts list 3HX21010 Job eject roller ROLLER EJECT 3HX21060 Job eject pulleys PULLEY EJECT Periodic maintenance procedures Maintenance Section Method...
Page 214: Wiring Diagram
Wiring diagram 2-3-2...
Page 215 FAX System (R) First Edition...
Page 216: Contents Of Maintenance Mode Items 1
CONTENTS 1-1 Specifications 1-1-1 Specifications............................1-1-1 1-1-2 Parts names............................1-1-4 (1) Main body............................1-1-4 (2) Document processor (option) ......................1-1-5 (3) Operation panel..........................1-1-6 1-2 Installation 1-2-1 Installation environment ..........................1-2-1 1-2-2 Unpacking and installation ........................1-2-2 1-3 Maintenance Mode 1-3-1 Maintenance mode ..........................1-3-1 (1) Maintenance mode item list.......................1-3-1 (2) Contents of maintenance mode items....................1-3-4 1-3-2 Management mode ..........................1-3-39 (1) Using the management mode ......................1-3-39...
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Page 218: Specifications
1-1 Specifications 1-1-1 Specifications Type ............Optional Fax Kit Compatibility ..........Group 3 Line requirement........Subscription telephone line Transmission speed........Within 3 seconds (33600 bps, JBIG, ITU-T #1 chart) Modem speed ..........33600/31200/28800/26400/24000/21600/19200/16800/14400/12000/9600/ 7200/4800/2400 bps Data compression ........JBIG/MMR/MR/MH Error correction .......... ECM Maximum document dimensions ....
Page 219 Reception functions Manual reception Automatic reception Fax/telephone auto selection TAD reception D.R.D. reception*1 Remote switching Transmission functions Abbreviated dialing One-touch dialing*2 Program dialing*2 Group dialing*2 Chain dialing*2 Redialing (manual/automatic) Communication functions Direct feed transmission Memory transmission Direct reception Memory reception (subaddress-based confidential reception and relay broadcast reception) Additional communication func- Broadcast transmission (up to 232 numbers)
Page 220 Reports Send result report Activity report Transmission report Reception report Power failure report Delayed communication report Confirmation report User settings list Encryption key list Management report Department list Abbreviated dial list One-touch dial list Telephone directory list Program dial list Group dial list Subaddress confidential box list Subaddress relay box list...
Page 221: Parts Names
1-1-2 Parts names (1) Main body Figure 1-1-1 Operation panel TEL connection connector (T1, T2) Line connection connector (L) Main power switch Eject tray Important Note that you cannot automatically receive FAX when turning the main power switch off. To turn the power off, press the Power key on the operation panel. When using this machine as a facsimile, it is not possible to feed paper from the MP tray.
Page 222: Document Processor (Option)
(2) Document processor (option) Figure 1-1-2 Original table Original width guides Original eject table Document processor top cover Original stopper Cleaning cloth compartment 1-1-5...
Page 223: Operation Panel
(3) Operation panel Figure 1-1-3 Message display 21. Communication Error indicator Start key 22. Cover plate Stop/Clear key 23. One-touch keys Reset key 24. Memory TX key Numeric keys 25. On-Hook key Interrupt key and indicator 26. Pause/Redial key Logout key 27.
Page 224: Installation Environment
1-2 Installation 1-2-1 Installation environment Installation location (Be based on the machine establishment place.) Avoid direct sunlight or bright lighting. Ensure that the photoconductor will not be exposed to direct sunlight or other strong light when removing paper jams. Avoid locations subject to high temperature and high humidity or low temperature and low humidity; an abrupt change in the environmental temperature;...
Page 225: Unpacking And Installation
1-2-2 Unpacking and installation Figure 1-2-1 Unpacking Fax control PWB assembly 13. FAX plate Plastic bag 14. One-touch label sheet Outer case 15. Operation section sheet Bottom pad 16. One-touch sheet Top pad 17. Fax label sheet M3 x 8 screws 18.
Page 226 Initialization procedure after installation of facsimile system 1. Insert the machine power plug to the wall outlet and turn the main power switch on. 2. Run maintenance item U601. 3. Enter a destination code using the numeric keys (refer to the destination code list) and then press the start key.
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Page 228: Maintenance Mode
1-3 Maintenance Mode 1-3-1 Maintenance mode (1) Maintenance mode item list Item Section Content of maintenance item Initial setting* U600 Initializing all data U601 Initializing permanent data U602 Setting factory defaults U603 Setting the user registration data Setting the self telephone number Setting the type of telephone line Setting the number of rings in the fax/telephone auto select mode Setting remote diagnostic transmission...
Page 229 Item Section Content of maintenance item Initial setting* U609 Setting communication time Setting the T0 time-out time Setting the T1 time-out time Setting the T2 time-out time Setting the Ta time-out time Setting the Tb1 time-out time Setting the Tb2 time-out time Setting the Tc time-out time Setting the Td time-out time U610...
Page 230 Item Section Content of maintenance item Initial setting* U660 Setting the system (communication 2) Setting the criteria for receiving a TCF signal 2 Setting the short protocol transmission Setting the reception of a short protocol transmission Setting the CNG detection times in the fax/telephone auto select mode Setting ECM for each abbreviated key Setting ECM for each one-touch key...
Page 231: Contents Of Maintenance Mode Items
(2) Contents of maintenance mode items Maintenance Description item No. Initializing all data U600 Description Initializes software switches and all data in the backup data on the fax control PWB, according to the destina- tion and OEM. Executes the check of the file system, when abnormality of the file system is detected, initializes the file sys- tem, communication past record and register setting contents.
Page 232 Maintenance Description item No. Initializing permanent data U601 Description Initializes software switches other than that for machine data on the fax control PWB according to the destina- tion and OEM. Purpose To initialize the fax control PWB without changing user registration data and factory settings. Method 1.
Page 233 Maintenance Description item No. Setting the user registration data U603 Description Makes user settings to enable the use of the machine as a fax. Purpose To be run after installation of the facsimile kit if necessary. Start 1. Press the start key. 2.
Page 234 Maintenance Description item No. Clearing data U604 Description Initializes data related to the fax transmission such as transmission history and IDs. Purpose To clear the transmission history or if an ID has been forgotten. Method 1. Press the start key. 2.
Page 235 Maintenance Description item No. Setting the system (operational) U605 Description Makes settings for fax transmission regarding operation. Start 1. Press the start key. 2. Select the item to be set using the cursor up/down keys. 3. Press the start key. The screen for the selected item appears.
Page 236 Maintenance Description item No. Setting the addition of an image to the report U605 Selects if an image is to be added to the transmission report. 1. Enter 1 or 2 using the numeric keys to change the setting. Display Description 1: ON Image added.
Page 237 Maintenance Description item No. Setting the initial condition of fax image scanning quality U605 Set to the resolution that is most frequently used by the user. 1. Change the setting using the numeric keys. Display Description 1: S Standard 2: F Fine 3: SF Super fine...
Page 238 Maintenance Description item No. Setting if the image scanning quality in fax mode is initialized U606 Sets if the resolution is to be initialized when fax operation is complete. (cont.) 1. Enter 1 or 2 using the numeric keys to change the setting. Display Description 1: ON...
Page 239 Maintenance Description item No. Setting the system (communication 1) U607 Description Makes settings for fax transmission regarding the communication. Start 1. Press the start key. 2. Select the item to be set using the cursor up/down keys. 3. Press the start key. The screen for the selected item appears.
Page 240 Maintenance Description item No. Setting the reception speed U607 Sets the reception speed that the sender is informed of using the DIS or NSF signal. When the destination unit (cont.) has V.34 capability, V.34 is selected, regardless of the setting. 1.
Page 241 Maintenance Description item No. Setting transmission U608 Description Makes settings regarding fax transmission. Start 1. Press the start key. 2. Select the item to be set using the cursor up/down keys. 3. Press the start key. The screen for the selected item appears. Display Description ERROR DEALING...
Page 242 Maintenance Description item No. Setting the waiting period to prevent echo problems at the sender U608 Sets the period before a DCS signal is sent after a DIS signal is received. Used when problems occur due to (cont.) echoes at the sender. 1.
Page 243 Maintenance Description item No. Setting the frequency of the CED signal U608 Sets the frequency of the CED signal. Used as one of the measures to improve transmission performance for (cont.) international communications. 1. Enter 1 or 2 using the numeric keys to change the frequency. Display Description 1: 2100...
Page 244 Maintenance Description item No. Setting the T2 time-out time U609 The T2 time-out time decides the following. (cont.) From CFR signal output to image data reception From image data reception to the next signal reception In ECM, from RNR signal detection to the next signal reception 1.
Page 245 Maintenance Description item No. Setting the Tc time-out time U609 In the TAD mode, set the time to check if there are any triggers for shifting to fax reception after a connected (cont.) telephone receives a call. Only the telephone function is available if shifting is not made within the set Tc time. In the TAD mode, change the setting when fax reception is unsuccessful or a telephone fails to receive a call.
Page 246 Maintenance Description item No. Setting the modem output level U610 Description Sets the modem output level. Start 1. Press the start key. 2. Select the item to be set using the cursor up/down keys. 3. Press the start key. The screen for the selected item appears. Display Description SGL LVL MODEM...
Page 247 Maintenance Description item No. G3 cable equalizer U611 Description Sets the G3 cable equalizer. Start 1. Press the start key. 2. Select the item to be set using the cursor up/down keys. 3. Press the start key. The screen for the selected item appears. Display Description REG.
Page 248 Maintenance Description item No. Setting the DTMF output level U613 Description Sets the DTMF output level of a push-button dial telephone. Purpose Used if problems occur when sending a signal with a push-button dial telephone. Start 1. Press the start key. 2.
Page 249 Maintenance Description item No. Adjusting the DTMF output level U614 Description Adjusts the DTMF output level of a push-button dial telephone. Purpose No change is necessary from the factory default. Start 1. Press the start key. 2. Select the item to be set using the cursor up/down keys. 3.
Page 250 Maintenance Description item No. Setting the NCU U615 Description Makes setting regarding the network control unit (NCU). Purpose To be set when installing the facsimile kit. Start 1. Press the start key. 2. Select the item to be set using the cursor up/down keys. 3.
Page 251 Maintenance Description item No. Setting for a PBX U615 Selects the mode to connect an outside call when connected to a PBX. (cont.) According to the type of the PBX connected, select the mode to connect an outside call. 1. Change the setting using the numeric keys. Display Description 1: EARTH...
Page 252 Maintenance Description item No. Outputting lists U617 Description Outputs a list of data regarding fax. Purpose To check conditions of use, settings and transmission procedures of the fax. Method 1. Press the start key. 2. Select the item to be output using the cursor up/down keys. 3.
Page 253 Maintenance Description item No. Setting the system 1 U650 Description Makes settings for fax reception regarding the sizes of the fax paper and received images and automatic print- ing of the protocol list. Start 1. Press the start key. 2. Select the item to be set using the cursor up/down keys. 3.
Page 254 Maintenance Description item No. Setting the number of lines to be ignored when receiving a fax (A4R, letter) in the auto reduction mode U650 Sets the maximum number of lines to be ignored if the received data volume exceeds the recording capacity (cont.) when the data is recorded in the auto reduction mode onto A4R or letter-size paper under the conditions below.
Page 255 Maintenance Description item No. Setting the system 2 U651 Description Sets the variation range in rotation reception and the number of adjustment lines for automatic reduction. Start 1. Press the start key. 2. Select the item to be set using the cursor up/down keys. 3.
Page 256 Maintenance Description item No. Setting the system (communication 2) U660 Description Makes settings for fax transmission regarding the communication. Purpose To reduce transmission errors when a low quality line is used. Start 1. Press the start key. 2. Select the item to be set using the cursor up/down keys. 3.
Page 257 Maintenance Description item No. Setting the CNG detection times in the fax/telephone auto select mode U660 Sets the CNG detection times in the fax/telephone auto select mode. (cont.) 1. Change the setting using the numeric keys. Display Description 1: 1 TIME Detects CNG once.
Page 258 Maintenance Description item No. Setting the system (communication 3) U670 Description Makes settings for fax transmission regarding the communication. Purpose To reduce transmission errors when a low quality line is used. Start 1. Press the start key. 2. Select the item to be set using the cursor up/down keys. 3.
Page 259 Maintenance Description item No. Setting the V.34 symbol speed (2800 Hz) U670 Sets if the V.34 symbol speed 2800 Hz is used. (cont.) 1. Enter 1 or 2 using the numeric keys to change the setting. Display Description 1: ON V.34 symbol speed 2800 Hz is used.
Page 260 Maintenance Description item No. List of Software Switches of Which the Setting Can Be Changed U882 <System setting> (cont.) Item 0 One-touch name and telephone number display on the destination check screen 5 Communication end buzzer after reception 1 Ringer frequency detection method 0 Top-bottom inversion in duplex reception 5 Setting the output priority when A5 size reception 7 F code check in NW-FAX reception...
Page 261 Maintenance Description item No. List of Software Switches of Which the Setting Can Be Changed U882 <Communication control procedure> (cont.) Item 2 Automatic reception level adjustment (V. 17) 1 Automatic reception level adjustment (V. 29) 0 Automatic reception level adjustment (V. 27ter) 7654 Coding format in transmission 3210 Coding format in reception 5 33600 bps/V34...
Page 262 Maintenance Description item No. List of Software Switches of Which the Setting Can Be Changed U882 <Modem setting> (cont.) Item 5 Equalizer freeze 76543210 RTH offset (lower byte) 76543210 RTH offset (upper byte) <NCU setting> Item 7654 Dial tone/busy tone detection pattern 7654 Busy tone detection pattern 1 Busy tone detection in automatic FAX/TEL switching 76543210 Access code registration for connection to PSTN...
Page 263 Maintenance Description item No. Performing board test U894 Description Performs tests on the DRAM (image memory, bitmap memory) and optional memory on the fax control PWB. Purpose To check if reading and writing are performed correctly in respective installed memories. Start 1.
Page 264 Maintenance Description item No. Setting backup data reading/writing U917 Description Stores backup data from the fax control PWB (when an optional fax kit is installed) into CompactFlash or reads the data from CompactFlash. Purpose To store and write data when replacing the PWB. Setting 1.
Page 265 Maintenance Description item No. Rewriting FAX program U926 Description Downloads the fax program and fax fonts when installing an optional fax kit. Purpose To run when upgrading the fax program and fax fonts. Setting 1. Press the power key on the operation panel, and after verifying the power indicator has gone off, switch off the main power switch.
Page 266: Management Mode
1-3-2 Management mode In addition to a maintenance function for service, the machine is equipped with a management function which can be oper- ated by users (mainly by the administrator). In this management mode, settings such as default settings can be changed. (1) Using the management mode •...
Page 267: Fax Default
(2) Fax default Number of rings setting [TAD reception] The number of times the fax will let the telephone ring before switching to fax reception can be set here to any Line type setting (inch only) number between 1 to 15. Set the type of phone line here to correspond to the type 1.
Page 268 Receive mode setting Duplex RX setting Select the automatic reception mode. When the width of each page received is exactly the 1. Select [Receive Mode (Reception mode)] using the same, the documents will be printed onto the front and cursor up/down keys and press the enter key. back sides of that size of paper.
Page 269: Registration
(3) Registration Registering New Abbreviated Numbers Register a fax number under a 3-digit abbreviated num- ber in advance. Registering the information identifying your facsim- 1. Select [Program Abbreviated Dial] and press the ile (location info. setting) enter key. Register information identifying your station (fax number, 2.
Page 270 Registering new subaddress relay boxes Program keys Register subaddress relay box for subaddress-based Register frequently used communication modes or fax relay broadcast communication. Up to 15 boxes can be numbers under one-touch keys. registered. 1. Select [Program Program key] and press the enter 1.
Page 271 Registering new encryption boxes Register encryption boxes for receiving encrypted trans- missions. Up to 15 boxes can be registered. 1. Select [Program encryption box (Encryp. Code Box Regist.)] and press the enter key. 2. Select an unregistered key and press the enter key. 3.
Page 272: Error Codes
1-4 Error Codes 1-4-1 Error codes (1) Error code Error codes are listed on the communication reports, activity report, etc. The codes consist of an error code indication U followed by a 5-digit number. (Error codes for V34 communication errors start with an E indication, followed by five digits.) The upper three of the five digits indicate general classification of the error and its cause, while the lower two indicate the detailed classification.
Page 273: Table Of General Classification
(2) Table of general classification Error code Description U00000 No response or busy after the set number of redials. U00100 Transmission was interrupted by a press of the stop/clear key. U00200 Reception was interrupted by a press of the stop/clear key. U00300 Recording paper on the destination unit has run out during transmission.
Page 274 Error code Description U03400 Polling reception was interrupted because of a mismatch in individual numbers (destination unit is either of our make or by another manufacturer). U03500 In confidential polling reception, the specified confidential box No. was not registered in the desti- nation.
Page 275: U004Xx Error Code Table: Interrupted Phase B
(2-1) U004XX error code table: Interrupted phase B Error code Description U00420 A relay request was received from the host center but interrupted because of a mismatch in permit ID or telephone number. U00421 Subaddress-based relay reception was interrupted because of a mismatch in the specified subad- dress relay box number.
Page 276: U006Xx Error Code Table: Problems With The Unit
(2-2) U006XX error code table: Problems with the unit Error code Description U00600 The document processor cover is open. U00601 Document jam or the document length exceeds the maximum. U00602 Image scanning section problem. U00603 No document feed. U00604 Document length exceeded the limit of the bitmap memory capacity. U00610 Recording section cover is open.
Page 277: U010Xx Error Code Table: G3 Transmission
(2-5) U010XX error code table: G3 transmission Error code Description U01000 An FTT signal was received for a set number of times after TCF signal transmission at 2400 bps. Or, an RTN signal was received in response to a Q signal (excluding EOP) after transmission at 2400 bps.
Page 278 Error code Description U01043 A DCN signal was received after transmission of an NSS1, NSS2 (TCF) signal (between units of our make). U01044 A DCN signal was received after transmission of an NSS3, TCF signal (between units of our make). U01045 A DCN or other inappropriate signal was received after transmission of an MPS signal.
Page 279: U011Xx Error Code Table: G3 Reception
(2-6) U011XX error code table: G3 reception Error code Description U01100 Function of the unit differs from that indicated by a DCS signal. U01101 Function of the unit (excl. communication mode select) differs from that indicated by an NSS sig- nal.
Page 280 Error code Description U01154 A DCN signal was received after transmission of an RNR signal (ECM). U01155 A DCN signal was received after transmission of an SPA signal (short protocol). U01160 During message reception, transmission time exceeded the maximum transmission time per line. U01161 Number of error lines exceeded limits during message reception.
Page 281: E017Xx Error Code Table: V.34 Transmission
(2-7) E017XX error code table: V.34 transmission Error code Description E01700 A communication error occurred in phase 2 (line probing). E01720 A communication error occurred in phase 4 (modem parameter exchange). E01721 Operation was interrupted due to the absence of a common communication speed between units. E01700: A communication error that occurs at the transmitting unit in the period after transmission of INFO0 before enter- ing phase 3 (primary channel equivalent device training).
Page 282: Self-Diagnosis
1-5 Troubleshooting 1-5-1 Self-diagnosis (1) Self-diagnostic function This unit is equipped with a self-diagnostic function. When a problem is detected, copying is disabled and the problem dis- played as a code consisting of C followed by a number, indicating the nature of the problem. A message is also displayed requesting the user to call for service.
Page 283 Remarks Code Contents Causes Check procedures/corrective measures C0890 Fax control PWB CG FONT archive Defective fax con- Replace the fax control PWB and verify the problem (optional fax) trol PWB. operation. When power is turned on, the com- pressed CG font in the Flash ROM on the fax control PWB was not success- fully decompressed.
Page 284: Upgrading The Firmware On The Fax Control Pwb
1-6 Requirements on PWB Replacement 1-6-1 Upgrading the firmware on the fax control PWB Firmware upgrading requires the following tools: Compact Flash (Products manufactured by SANDISK are recommended.) Procedure 1. Enter the maintenance mode and run main- tenance item U680 (Displaying the fax board ROM version).
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Page 286: Electrical Parts Layout
2-1 Electrical Parts Layout 2-1-1 Electrical parts layout Machine front Machine inside Machine rear Figure 2-1-1 Fax control PWB (FCPWB)......Modulates, demodulates, compresses, decompresses and smoothes out image data, and converts resolution of image data. NCU PWB (NCUPWB)......... Controls connection to the telephone line. Backup battery (BUBAT) ......
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Page 288: Fax Control Pwb
2-2 Operation of the PWBs 2-2-1 Fax control PWB YC10 Figure 2-2-1 Fax control PWB silk-screen diagram 2-2-1...
Page 289 Connector Pin No. Signal Voltage Description _WAKEUPFAX 3.3/0 V DC _WAKEUPFAX signal Connected _FAXSET 3.3/0 V DC _FAXSET signal to the main MAIN_RXD 3.3/0 V DC (pulse) MAIN_RXD signal PWB (fax _FAXREADY 3.3/0 V DC _FAXREADY signal relay PWB). _SREQ 3.3/0 V DC _SREQ signal _FPVD...
Page 290 Connector Pin No. Signal Voltage Description +12V 12 V DC +12 V DC power supply Connected Ground to the NCU 5 V DC 5 V DC supply PWB. Ground EXTRING1 Not used EXTRING2 Not used KMUTE 3.3/0 V DC KMUTE signal SHUNT 3.3/0 V DC SHUNT signal...
Page 291: Ncu Pwb
2-2-2 NCU PWB MCN3 MCN2 MCN1 Figure 2-2-2 NCU PWB silk-screen diagram 2-2-4...
Page 292 Connector Pin No. Signal Voltage Description RXIN Analog RXIN signal Connected MODRXD Analog MODRXD signal to the fax _RNGDET 3.3/0 V DC Ring signal control MODTXD Analog MODTXD signal PWB. _ONHOOK1 5/0 V DC _ONHOOK1 signal _ONHOOK2 5/0 V DC _ONHOOK2 signal _OFFHOOK 3.3/0 V DC...
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Page 294: Wiring Diagram
2-3 Appendixes Wiring diagram 2-3-1...
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This manual is also suitable for:

Pf-420 Js-420 Dp-420

Kyocera DF-420 Service Manual

Table of Contents

Specifications

1-2 Installation

Maintenance Mode

1-4 Troubleshooting

Assembly and Disassembly

2-1 Mechanical Construction

Electrical Parts Layout

2-3 Operation of the Pwbs

Table of Contents

Specifications

1-2 Installation

Maintenance Mode

1-4 Troubleshooting

1-5 Assembly and Disassembly

Mechanical Construction

Electrical Parts Layout

2-3 Operation of the Pwbs

Specifications 1

1-2 Installation

1-3 Maintenance Mode

1-4 Troubleshooting

1-5 Assembly and Disassembly

2-1 Mechanical Construction

2-3 Operation of the Pwbs

2-4 Appendixes

Specifications/Electrical Parts Layout

1-2 Installation

1-3 Maintenance Mode

1-4 Troubleshooting

2-1 Mechanical Construction

2-3 Appendixes

Fax System (R)

Specifications

1-2 Installation

1-3 Maintenance Mode

Error Codes

1-5 Troubleshooting

1-6 Requirements on PWB Replacement

Electrical Parts Layout

2-2 Operation of the Pwbs

2-3 Appendixes

Quick Links

Chapters

Related Manuals for Kyocera DF-420

Summary of Contents for Kyocera DF-420