Minolta Di620 Troubleshooting Manual
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Minolta Di620 Troubleshooting Manual

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Summary of Contents for Minolta Di620

  • Page 1 Return to SubMenu Di620 TROUBLESHOOTING...

  • Page 2: Table Of Contents

    1155SBT000BA CONTENTS 1. INTRODUCTION 1-1. General Precautions ........T-1 1-2.
  • Page 3 CONTENTS 6) C0072 : Main Hopper Toner Replenishing Motor M9’s Failure to Turn ......T-46 7) C0090 : Developing Unit Drive Motor M1’s Failure to Turn .
  • Page 4 CONTENTS 16) C0996 : 3rd Drawer Lock Release Failure....T-68 C0997 : 3rd Drawer Shift Gate Motion Failure 17) C0998 : Shifter Transfer Failure..... . . T-70 C099C: 3rd Drawer Shift Motor M29’s Failure to Turn 18) C0E00 : Main Erase Lamp LA1’s Failure to Turn ON.

  • Page 5: Introduction

    INTRODUCTION 1139SBT0101A 1-1. General Precautions 1. When servicing the copier with its covers removed, use utmost care to prevent your hands, clothing, and tools from being caught in revolving parts including the chains and gears. When servicing the copier with the Rear Cover removed, be sure to fit the interlock switch actuating jig in position. 2.

  • Page 6: I/O Check

    I/O CHECK 1155SBT0201A 2-1. Controlled Parts Check Procedure To allow the Tech. Rep. to easily and safely determine whether a particular controlled part is fully operational, this copier provides the following provision: checking the data of the input port of the board IC with the copier in the standby state (including a misfeed, malfunction, and closure failure condition) allows the Tech.

  • Page 7: I/O Check List

    1155SBT0202A 2-2. I/O Check List <I/O Check Screens> • The following screens are only typical and the port data shown does not necessarily represent the actual one. 1155T021CC 1155T024CC 1155T022CC 1155T025CC 1155T023CC 1155T026CC...
  • Page 8 <I/O Check List> Operation Charac- teristics/Panel Dis- Port CN/PJ Symbol Panel Display Parts/Signal Name play 1st Drawer Set Sen- Out of PC44 Drawer Set In position IC1F PC1 PJ15F-5B position 1st Drawer Paper Paper Paper not PC32 Take-up IC1F PC3 PJ15F-2A Take-Up Sensor present present...
  • Page 9 Operation Charac- teristics/Panel Dis- Port CN/PJ Symbol Panel Display Parts/Signal Name play Cabi- Universal Size Paper Size Detect- IC2F PF0 PJ11F-9 ing Switch FD1 Universal Size Paper Size Detect- IC2F PF1 PJ11F-7 ing Switch FD2 Universal Size Paper Size Detect- IC2F PF2 PJ11F-5 ing Switch FD3...
  • Page 10 Operation Charac- teristics/Panel Dis- Port CN/PJ Symbol Panel Display Parts/Signal Name play Fusing Upper Roller Upper Fusing Roller Voltage value IC1A ANI0 PJ3A-9B (°C) Thermistor (A/D converted) Unit Lower Roller Lower Fusing Roller Voltage value IC1A ANI1 PJ3A-10B (°C) Thermistor (A/D converted) Thermistor Set Out of...

  • Page 11: Paper Transport Failure

    PAPER TRANSPORT FAILURE 1156SBT0301A 3-1. Paper Misfeed When a paper misfeed occurs, the Touch Panel shows the corresponding message, misfeed location, and paper location. Blinking Misfeed location Paper location 1155O632CA...
  • Page 12 Lit/Blinking LED Misfeed/Paper Location Ref. Page ∗ ADF take-up See the relevant ∗ ADF turnover/exit option service manual. ∗ ADF transport Multi bypass take-up Copier transport/separator Copier fusing Duplex horizontal transport Duplex turnover 1st Drawer take-up 2nd Drawer take-up 3rd Drawer take-up Vertical transport (lower right of copier) ∗...
  • Page 13 <Misfeed Detection Sensor Layout> Paper Exit Switch Paper Leading Edge Sensor Transport Roller Sensor Manual Feed Paper Empty Turnover Feed Entry Sensor PC6 Sensor PC11 1st Drawer Paper Take-Up Turnover/Exit Sensor Sensor PC32 PC14 Vertical Transport Sensor 1 PC36 Turnover Feed Jam Sensor PC57 Vertical Transport Sensor 2 PC37...

  • Page 14: Types Of Misfeed Detection And Detection Timings

    1155SBT0302A 3-2. Types of Misfeed Detection and Detection Timings <Copier Take-Up Misfeed> Type Detection Timing Paper take-up failure 1st Drawer Paper Take-Up Sensor PC32 is not blocked ([L]) even after the detection lapse of approx. 0.3 sec. after 1st Drawer Paper Take-Up Clutch CL3 has been energized (after two paper take-up retry sequences).
  • Page 15 <Duplex Unit Paper Take-Up Misfeed> Type Detection Timing Trailing edge detection by PC11 is not unblocked ([H]) even after the lapse of approx. 2.3 sec. after Turnover Feed Entry Sen- Paper Leading Edge Sensor PC2 has been unblocked ([H]) when the sor PC11 paper is fed out onto the Lower Exit Tray or stored in the Duplex Unit.

  • Page 16: Misfeed Clearing Procedures

    1155SBT0303A 3-3. Misfeed Clearing Procedures 1) Copier Take-Up Misfeed Relevant Electrical Parts 1st Drawer Paper Take-Up Clutch CL3 Vertical Transport Motor M22 2nd Drawer Paper Take-Up Clutch CL4 Vertical Transport Sensor 1 PC36 3rd Drawer Paper Take-Up Clutch CL5 Vertical Transport Sensor 2 PC37 1st Drawer Paper Take-Up Sensor PC32 Vertical Transport Sensor 3 PC38 2nd Drawer Paper Take-Up Sensor PC33...
  • Page 17 <Copier Take-Up Misfeed Clearing Procedure> Symptom Step Check Item Result Action • Paper is not Does the paper being used meet Instruct the user to use the taken up at all. product specifications? paper that meets product • Paper is at a specifications.

  • Page 18: Transport/Separator Misfeed

    2) Transport/Separator Misfeed Relevant Electrical Parts Transport Motor M23 Suction Fan Motor M14 Transport Roller Sensor PC1 Master Board PWB-A Synchronizing Motor M5 Synchronizing Motor Control Board PWB-T Paper Leading Edge Sensor PC2 Drawer S/P Board PWB-F Separator Finger Solenoid SL4 1155C02TAA T-14...
  • Page 19 <Transport/Separator Misfeed clearing Procedure> Symptom Step Check Item Result Action Paper is at a Are the Transport Rollers deformed, Clean or change the Trans- stop at the worn, or dirty with paper dust? port Rollers. Transport Roll- Does M23 turn when the Start key is Check for overload and then ers.
  • Page 20 Symptom Step Check Item Result Action Paper is at a Is the Pre-Image Transfer Guide Plate Clean or change the guide stop near the PC dirty or deformed, or has the seal plate. Drum. been separated? Are the Image Transfer/Paper Separa- Clean or change the defec- tor Corona Wires dirty or deformed? tive corona wire.

  • Page 21: Multi Bypass Misfeed

    3) Multi Bypass Misfeed Relevant Electrical Parts Manual Feed Paper Take-Up Clutch CL1 Manual Feed Paper Pressure Solenoid SL1 Manual Feed Paper Empty Sensor PC6 Master Board PWB-A Power Supply Board PWB-C 1155C03TAA T-17...
  • Page 22 <Multi Bypass Misfeed Clearing Procedure> Symptom Step Check Item Result Action Paper is not Does the paper being used meet Instruct the user to use the taken up at all. product specifications? paper that meets product specifications. Is the paper curled, wavy, or damp? Change the paper.

  • Page 23: Fusing/Exit Misfeed

    4) Fusing/Exit Misfeed Relevant Electrical Parts Suction Fan Motor M14 Exit /Duplex Switching Solenoid SL3 Paper Exit Switch S10 Master Board PWB-A 1155C04TAB T-19...
  • Page 24 <Fusing/Exit Misfeed Clearing Procedure> Symptom Step Check Item Result Action Paper is at a Is the Fusing Guide Plate dirty or Clean or change the Fusing stop before the deformed? Guide Plate. Fusing Roller. Check M14 for operation. Check the Suction Belts and Does the voltage across PJ3A-7B on change M14.

  • Page 25: Duplex Unit Take-Up Misfeed

    5) Duplex Unit Take-Up Misfeed Relevant Electrical Parts Turnover Feed Entry Sensor PC11 Duplex Unit Horizontal Transport Jam Sensor Duplex Unit Horizontal Transport Sensor PC12 PC56 Duplex Unit Horizontal Transport Entry Sensor Turnover Feed Jam Sensor PC57 PC13 Duplex Unit Paper Take-Up Solenoid SL2 Turnover/Exit Sensor PC14 Master Board PWB-A Duplex Unit Turnover Exit Solenoid SL5...
  • Page 26 <Duplex Unit Take-Up Misfeed Clearing Procedure> Symptom Step Check Item Result Action Paper is at a Does M6 turn during a 2-sided copy Check for overloads and stop in the verti- cycle? then check step 4 and cal transport onward. section of the Is the knob of the Horizontal Transport Check gears and proper...
  • Page 27 Symptom Step Check Item Result Action Paper is at a Check SL5 for operation. Change PWB-A. stop in the turn- Does the voltage across PJ6A-3B on over section of PWB-A and GND change from the Duplex Unit. DC24V to DC0V when a copy cycle is run in the Sort and Folding mode? Has the misfeed occurred when a Check step 8.
  • Page 28 M E M O...

  • Page 29: Malfunction

    1155SBT0400A MALFUNCTION The copier CPU has a function that self-diagnoses the copier conditions. On detection of a malfunction, the corresponding malfunction name, location, and definition codes are shown on the Touch Panel together with a technical representative call message. • Perform the following steps to reset malfunctions. <Malfunction Resetting Procedure>...

  • Page 30: Detection Timing By Malfunction Code

    1155SBT0401A 4-1. Detection Timing by Malfunction Code C00∗∗ Drive system malfunctions Code Description Detection Timing • The Lock signal remains HIGH for a continuous 1.5- C0000 Fusing Motor M3's failure to turn sec. or more period while M3 remains energized. •...
  • Page 31 Code Description Detection Timing • Toner Bottle Home Position Sensor PC4 is not C0072 Main Hopper Toner Replenishing Motor M9's failure to turn unblocked ([H]) even after the lapse of 5 sec. after M9 has been energized. • PC4 is not blocked ([L]) even after the lapse of 10 sec. after M9 has been energized and PC4 has been unblocked ([H]).
  • Page 32 C04∗∗ Exposure Lamp malfunctions C14A∗ Exposure Lamp Heater malfunctions Code Description Detection Timing C0400 Exposure Lamp FL1's failure to <When the light intensity is adjusted> turn ON The CCD read data does not exceed the specified level when the peak is detected of the intensity of light after the lapse of, or within, 1 min.
  • Page 33 C06∗∗ Optical Section malfunctions Code Description Detection Timing C0600 Scanner Motor M31 malfunction Encoder pulses are not input to SCP Board PWB-IC at 50-msec. intervals while M31 is turning. C0602 Cable unwound Scanner Reference Position Sensor PC55 is not blocked ([H]) despite the fact that the M31 encoder pulse count represents that the Scanner is at a position 5 mm or more to the rear (to the right as viewed from the front)
  • Page 34 Code Description Detection Timing C0914 2nd Drawer Lift-Up Motor M25’s <Metric Areas> • PC26 detects no HIGH-going or LOW-going edges failure to turn even after the lapse of 500 msec. after M25 has started turning. <Inch Areas> • PC26 detects no HIGH-going or LOW-going edges even after the lapse of 500 msec.
  • Page 35 Code Description Detection Timing • 3rd Drawer Paper Lift-Up Sensor PC42 is not blocked C0990 3rd Drawer lift-up failure ([L]) even when 3rd Drawer Elevator Motor Pulse Sen- sor PC29 has detected 400 HIGH-going and LOW- going edges after 3rd Drawer Elevator Motor M28 has started turning forward (for upward motion);...
  • Page 36 Code Description Detection Timing • 3rd Drawer Shifter Return Position Sensor PC23 is not C0998 Shifter transfer failure blocked ([L]) even when 3rd Drawer Shift Motor Pulse Sensor PC30 detects 400 HIGH-going and LOW- going edges after 3rd Drawer Shift Motor M29 has started turning forward (for rightward motion);...
  • Page 37 C0B3∗ Paper aligning mechanism malfunctions Code Description Detection Timing C0B30 CD Aligning Motor M6's failure to turn C0B31 CD Aligning Motor M6's failure to turn C0B34 FD Aligning Motor M5's failure to ∗See the option service manual. turn C0B35 FD Aligning Motor M5's failure to turn C0B36 FD Aligning Motor M5's failure to turn...
  • Page 38 C0BC∗ Paper folding malfunctions Code Description Detection Timing C0BC0 1st Crease Stopper Motor M12's failure to turn C0BC1 1st Crease Stopper Motor M12's failure to turn ∗See the option service manual. C0BC2 Paper Crease Motor M11's failure to turn C0BC3 Paper Crease Motor M11 turning at abnormal timing C0BF∗...
  • Page 39 C10∗∗~C12∗∗ Code Description C10∗∗ Failure in Memory Board (ASIC, IC, etc.) C11∗∗ C12∗∗ Defective Memory Board (control system) C12C∗ Hard Disk Drive failure C13∗∗ Printer Engine malfunctions Code Description Detection Timing • A LOW Lock signal is not detected within 5 to 20 sec. C1300 Polygon Motor M4's failure to turn after M4 has been energized at 600 dpi;...
  • Page 40 C14∗∗ Image Reader malfunctions Code Description Code Description C1401 IR main routine time over C1402 IR illegal interrupt vector occurred C1410 IR watchdog C1426 Communications error 2 reception buffer full C1428 Communications error 2 transmission C1429 Communications error 3 transmission buffer full buffer full C142A Communications error 4 transmission...

  • Page 41: Troubleshooting Procedures By Malfunction Code

    1155SBT0402A 4-2. Troubleshooting Procedures by Malfunction Code ∗ If a malfunction code is shown on the Touch Panel, reset the malfunction and then start the relevant troubleshooting procedure. 1) C0000 : Fusing Motor M3's Failure to Turn C0010 : PC Drum Drive Motor M2's Failure to Turn Relevant Electrical Parts Fusing Motor M3 Master Board PWB-A...
  • Page 42 C0000 Step Check Item Result Action Check M3 for operation. Change PWB-A. Does the voltage across PJ7A-1A on PWB- A and GND change from DC5V to DC0V when the Start key is pressed? Does the voltage across PJ7A-8A on PWB- Check gears for overload and, if they are A and GND change from DC5V to DC0V okay, change M3.

  • Page 43: C0020 : Paper Take-Up Motor M21'S Failure To Turn

    2) C0020 : Paper Take-Up Motor M21's Failure to Turn C0040 : Suction Fan Motor M14's Failure to Turn C0042 : Toner Suction Fan Motor M13's Failure to Turn C0048 : Hard Disk Drive Cooling Fan Motor 1 M34's Failure to Turn, Hard Disk Drive Cooling Fan Motor 2 M35's Failure to Turn Relevant Electrical Parts Paper Take-Up Motor M21...
  • Page 44 C0020 Step Check Item Result Action Check M21 for operation. Change PWB-A or PWB-F. Does the voltage across PJ2F-2 on PWB-F and GND change from DC5V to DC0V when the Start key is pressed? Does the voltage across PJ2F-4 on PWB-F Change PWB-A or PWB-F.

  • Page 45: C0049 : Ph Cooling Fan Motor M19'S Failure To Turn

    3) C0049 : PH Cooling Fan Motor M19’s Failure to Turn C004A: PC Drum Cooling Fan Motor M17’s Failure to Turn Relevant Electrical Parts PC Drum Cooling Fan Motor M17 PH Cooling Fan Motor M19 Master Board PWB-A Power Supply Board PWB-C 1155C11TAB T-40...
  • Page 46 C0049 Step Check Item Result Action Check M19 for operation. Change PWB-A. Does the voltage across PJ8A-12A on PWB-A and GND change from DC0V to DC24V when the Start key is pressed? Does the voltage across PJ8A-11A on Change PWB-A. PWB-A and GND change from DC5V to Check gears for overload and, if they are DC0V when the Start key is pressed?

  • Page 47: C004B: Ccd Cooling Fan Motor M32'S Failure To Turn

    4) C004B: CCD Cooling Fan Motor M32’s Failure To Turn C004C: Ozone Ventilation Fan Motor M12's Failure to Turn Relevant Electrical Parts Ozone Ventilation Fan Motor M12 Master Board PWB-A CCD Cooling Fan Motor M32 Power Supply Board PWB-C 1155C08TAB T-42...
  • Page 48 C004B Step Check Item Result Action Check M32 for operation. Change PWB-A. Does the voltage across PJ10A-9B on PWB-A and GND change from DC0V to DC24V when the malfunction is reset? Does the voltage across PJ10A-11B on Change PWB-A. PWB-A and GND change from DC5V to Check gears for overload and, if they are DC0V when the malfunction is reset? okay, change M17.

  • Page 49: C004E: Power Supply Unit Cooling Fan Motor 1 M15'S

    5) C004D: Power Supply Unit Cooling Fan Motor 3 M18's Failure to Turn C004E: Power Supply Unit Cooling Fan Motor 1 M15's Failure to Turn Power Supply Unit Cooling Fan Motor 2 M16's Failure to Turn Relevant Electrical Parts Power Supply Unit Cooling Fan Motor 3 M18 Master Board PWB-A Power Supply Unit Cooling Fan Motor 2 M16 Power Supply Unit Cooling Fan Motor 1 M15...
  • Page 50 C004D Step Check Item Result Action Check M18 for operation. Change PWB-A. Does the voltage across PJ2A-13B on PWB-A and GND change from DC0V to DC24V when the malfunction is reset? Does the voltage across PJ2A-15B on Change PWB-A. PWB-A and GND change from DC5V to Check gears for overload and, if they are DC0V when the malfunction is reset? okay, change M18.

  • Page 51: Turn

    6) C0072 : Main Hopper Toner Replenishing Motor M9's Failure to Turn Relevant Electrical Parts Main Hopper Toner Replenishing Motor M9 Master Board PWB-A Toner Bottle Home Position Sensor PC4 Toner Replenishing Motor Control Board PWB-O 1155C09TAB C0072 Step Check Item Result Action Manually turn the Toner Bottle a half turn...
  • Page 52 7) C0090 : Developing Unit Drive Motor M1's Failure to Turn Relevant Electrical Parts Developing Unit Drive Motor M1 Master Board PWB-A Power Supply Board PWB-C 1155C10TAA C0090 Step Check Item Result Action Check M1 for operation. Change PWB-A. Does the voltage across PJ7A-5A on PWB- A and GND change from DC5V to DC0V when the Start key is pressed? Does the voltage across PJ7A-7A on PWB-...

  • Page 53: Defective Drum Comb Cleaning Home Position Sensor Pc16

    8) C0100 : PC Drum Charge Comb Cleaning Motor M7's Failure to Turn Defective Drum Comb Cleaning Home Position Sensor PC16 C0110 : Image Transfer/Paper Separator Wire Cleaning Motor M8's Failure to Turn Defective Transfer/Separator Wire Cleaning Home Position Sensor PC17 Relevant Electrical Parts PC Drum Charge Comb Cleaning Motor M7 Transfer/Separator Wire Cleaning Home Position...
  • Page 54 C0100 Step Check Item Result Action Check the “I/O Check” screen to see if Check the PC16 actuator for operation PC16 is operational. and, if it is okay, change PC16. Manually turn the screw shaft to bring the cleaner to its home position. Is the "Clean (Charge)"...

  • Page 55: C0200 : Pc Drum Charge Corona Leak Detected

    9) C0200 : PC Drum Charge Corona Leak Detected C0210 : Image Transfer Corona Leak Detected C0220 : Developing Bias Leak Detected C0230 : Paper Separator Corona Leak Detected Relevant Electrical Parts PC Drum Charge/Developing Bias HV HV1 Master Board PWB-A Image Transfer/Paper Separator HV HV2 Power Supply Board PWB-C 1155C13TAA...
  • Page 56 C0200 Step Check Item Result Action Is the Comb Electrode installed properly? Install the Comb Electrode properly. Is the Comb Electrode dirty or has it Clean or change the Comb Electrode. snapped? Is “C0200” shown even when PJ38HV1 is Change PWB-A. unplugged from HV1? Change HV1.

  • Page 57: C0400 : Exposure Lamp Fl1'S Failure To Turn On

    10) C0400 : Exposure Lamp FL1's Failure to Turn ON C0420 : Exposure Lamp FL1 Turning ON at Abnormal Timing C14A0: Exposure Lamp Heater UN13 Failure (during Warming-up) C14A1: Exposure Lamp Heater UN13 Failure (Abnormally Low Temperature) C14A2: Exposure Lamp Heater UN13 Failure (Abnormally High Temperature) C14A3: IR Warming-up Failure Relevant Electrical Parts Exposure Lamp FL1...
  • Page 58 C0400, C0420 Step Check Item Result Action Has Exposure Lamp FL1 blackened? Change FL1. Does the Exposure Lamp turn ON when Check PWB-IE and check step 4 and "Exp. Lamp Check" of "Function (I.R.)" onward. under "I.R. & EDH Check" available from the Tech.

  • Page 59: C0500 : Warming-Up Failure

    11) C0500 : Warming-up Failure C0510 : Abnormally Low Fusing Temperature C0520 : Abnormally High Fusing Temperature C0540 : Fusing Roller Thermistor Loading Failure C0550 : Hard Protect Detected <Metric Areas> Relevant Electrical Parts Upper Fusing Roller Heater Lamp H1 Upper Fusing Heater Lamp SSR1 SSR1 Lower Fusing Roller Heater Lamp H2 Lower Fusing Heater Lamp SSR2 SSR2...
  • Page 60 <Inch Areas> Relevant Electrical Parts Upper Fusing Roller Heater Lamp H1 Lower Fusing Roller Thermal Fuse TF2 Lower Fusing Roller Heater Lamp H2 Upper Fusing Heater Lamp SSR1 SSR1 Upper Fusing Roller Thermistor TH1 Lower Fusing Heater Lamp SSR2 SSR2 Lower Fusing Roller Thermistor TH2 Main Relay (RY1) Upper Fusing Roller Thermal Fuse TF1...
  • Page 61 C0500, C0510 Step Check Item Result Action Remove the Fusing Unit Front Cover and Check step 7 and onward. then turn ON the Power Switch. Does H1 turn ON at this time? Does H2 turn ON when the malfunction is Check step 8 and onward.
  • Page 62 C0520 Step Check Item Result Action Does H1 remain ON after the copier has Check step 4 and onward. completed warming up? Or, is H2 ON when "Fuser (Lower)" shown on "Level History" available from "Tech. Rep. Mode" is 140°C or more? Does the voltage across PJ8A-3B on PWB- Change PWB-A.

  • Page 63: C0600 : Scanner Motor M31 Malfunction

    12) C0600 : Scanner Motor M31 Malfunction C0602 : Cable Unwound C0650 : SHOME Signal Error Relevant Electrical Parts Scanner Motor M31 Digital Image Processing Board PWB-IB Scanner Reference Position Sensor PC55 SCP Board PWB-IC 1155C16TAA T-58...
  • Page 64 C0600 Step Check Item Result Action Is PJ3IC securely plugged into PWB-IC? Plug it in securely. Check M31 for operation. Check gears for overload and, if they are Does the voltage across PJ1IC-11 on okay, change M31 or PWB-IC. PWB-IC and GND change from DC5V to DC0V when the malfunction is reset? Is the voltage across PJ3IC-6 on PWB-IC Change PWB-IB.

  • Page 65: C0910 : 2Nd Drawer Lift-Up Failure

    13) C0910 : 2nd Drawer Lift-Up Failure C0911 : 2nd Drawer Lock Release Failure (Inch Areas) C0914 : 2nd Drawer Lift-Up Motor M25's Failure to Turn <Metric Areas> Relevant Electrical Parts 2nd Drawer Lift-Up Motor M25 Master Board PWB-A 2nd Drawer Paper Lift-Up Sensor PC41 Drawer S/P Board PWB-F 2nd Drawer Lift-Up Motor Pulse Sensor PC26 1155C28TAA...
  • Page 66 <Inch Areas> Relevant Electrical Parts 2nd Drawer Lift-Up Motor M25 2nd Drawer Lower Position Sensor PC19 2nd Drawer Paper Lift-Up Sensor PC41 Master Board PWB-A 2nd Drawer Lift-Up Motor Pulse Sensor PC26 Drawer S/P Board PWB-F 2nd Drawer Paper Descent Key UN8 2nd Drawer Flexible Printed Circuit PWB-M2 1155C29TAA T-61...
  • Page 67 <Metric Areas> C0910, C0914 Step Check Item Result Action Does M25 start turning when the 2nd Check for overloads and then check step Drawer is slid out and back in? 3 and onward. Does the voltage across PJ4F-3 on PWB-F Check gears for overload and, if they are and GND change from DC0V to DC24V okay, change M25.

  • Page 68: C0920 : 1St Drawer Lift-Up Failure

    14) C0920 : 1st Drawer Lift-Up Failure C0921 : 1st Drawer Lock Release Failure (Inch Areas) C0924 : 1st Drawer Lift-Up Motor M24's Failure to Turn <Metric Areas> Relevant Electrical Parts 1st Drawer Lift-Up Motor M24 Master Board PWB-A 1st Drawer Paper Lift-Up Sensor PC40 Drawer S/P Board PWB-F 1st Drawer Lift-Up Motor Pulse Sensor PC25 1155C30TAB...
  • Page 69 <Inch Areas> Relevant Electrical Parts 1st Drawer Lift-Up Motor M24 1st Drawer Lower Position Sensor PC18 1st Drawer Paper Lift-Up Sensor PC40 Master Board PWB-A 1st Drawer Lift-Up Motor Pulse Sensor PC25 Drawer S/P Board PWB-F 1st Drawer Paper Descent Key UN7 1st Drawer Flexible Printed Circuit PWB-M1 1155C31TAA T-64...
  • Page 70 <Metric Areas> C0920, C0924 Step Check Item Result Action Does M24 start turning when the 1st Check for overloads and then check step Drawer is slid out and back in? 3 and onward. Does the voltage across PJ4F-1 on PWB-F Check gears for overload and, if they are and GND change from DC0V to DC24V okay, change M24.

  • Page 71: C0990 : 3Rd Drawer Lift-Up Failure

    15) C0990 : 3rd Drawer Lift-Up Failure C0994 : 3rd Drawer Elevator Motor M28's Failure to Turn Relevant Electrical Parts 3rd Drawer Paper Lift-Up Sensor PC42 3rd Drawer Elevator Motor M28 3rd Drawer Paper Empty Sensor PC50 3rd Drawer Elevator Motor Pulse Sensor PC29 3rd Drawer Lower Position Sensor PC20 Master Board PWB-A 3rd Drawer Overrun Detecting Sensor PC21...
  • Page 72 C0990 Step Check Item Result Action Is PC42 fully operational? Make the input Check the PC42 actuator for operation port check using “I/O Check.” and, if it is okay, change PC42. Is PC50 fully operational? Make the input Check the PC50 actuator for operation port check using “I/O Check.”...

  • Page 73: C0996 : 3Rd Drawer Lock Release Failure

    16) C0996 : 3rd Drawer Lock Release Failure C0997 : 3rd Drawer Shift Gate Motion Failure Relevant Electrical Parts 3rd Drawer Lock Solenoid SL6 Master Board PWB-A 3rd Drawer Shift Gate Position Sensor PC52 Drawer S/P Board PWB-F 3rd Drawer Shift Gate Motor M30 3rd Drawer Flexible Printed Circuit PWB-H 1155C20TAA T-68...
  • Page 74 C0996 Step Check Item Result Action Check SL6 for operation. Change SL6. Does the voltage across PJ7F-2 on PWB-F Change PWB-A or PWB-F. and GND change from DC24V to DC0V when 3rd Drawer Paper Descent Key UN9 is pressed? C0997 Step Check Item Result...

  • Page 75: C0998 : Shifter Transfer Failure

    17) C0998 : Shifter Transfer Failure C099C: 3rd Drawer Shift Motor M29's Failure to Turn Relevant Electrical Parts 3rd Drawer Shifter Return Position Sensor PC23 3rd Drawer Shift Motor Pulse Sensor PC30 3rd Drawer Shifter Home Position Sensor PC22 Master Board PWB-A 3rd Drawer Shift Motor M29 Drawer S/P Board PWB-F 3rd Drawer Flexible Printed Circuit PWB-H...
  • Page 76 C0998 Step Check Item Result Action Is PC23 fully operational? Make the input Check the PC23 actuator for operation port check using “I/O Check.” and, if it is okay, change PC23 or PWB-H. Is PC22 fully operational? Make the input Change PWB-A.

  • Page 77: C0E00: Main Erase Lamp La1'S Failure To Turn On

    18) C0E00: Main Erase Lamp LA1's Failure to Turn ON Relevant Electrical Parts Main Erase Lamp LA1 Master Board PWB-A 1155C22TAA C0E00 Step Check Item Result Action Does the voltage across PJ10A-10B on Change PWB-A. PWB-A and GND change from DC24V to DC0V when the Start key is pressed? Is the voltage across PJ10A-10B on PWB- Change LA1.

  • Page 78: Failure

    19) C0F24 : AIDC Sensor UN6 Contamination Correction Failure Relevant Electrical Parts AIDC Sensor UN6 Master Board PWB-A 1155C23TAA C0F24 Step Check Item Result Action Are PJ10A, CN27, CN21, and CN64 Plug them in securely. plugged securely into PWB-A? Is the photosensor/LED of the AIDC Sen- Clean UN6 and run the F5 operation.

  • Page 79: C0F32 : Atdc Sensor Un4 Failure

    20) C0F32 : ATDC Sensor UN4 Failure C0F33 : Abnormally Low T/C as Detected by ATDC Sensor UN4 C0F34 : T/C Recovery Failure as Detected by ATDC Sensor UN4 Relevant Electrical Parts ATDC Sensor UN4 Master Board PWB-A 1155C24TAB C0F32, C0F33, C0F34 Step Check Item Result...

  • Page 80: C10∗∗~C14

    21) C10∗∗~C14∗∗ • These malfunctions are concerned with faulty symptoms as they relate to software, hardware, and communications. For remedial action change the board, check for cable connections, and turn OFF and ON the power. Code Action C10∗∗ Reset the malfunction and turn OFF and ON the Power Switch. C11∗∗...
  • Page 81 Code Action C1440 Check that the Original Glass is properly installed and then reset the malfunction and turn OFF and ON the Power Switch. If C1469 is shown, check the harness between IA and IB and the IA power supply. If they are okay, change PWB-IA or PWB-IB.

  • Page 82: The Copier Does Not Turn On

    22) The Copier Does not Turn ON Relevant Electrical Parts Power Switch S1 DC Power Supply PU1 Lower Front Door Interlock Switch S2 Master Board PWB-A Right Door Interlock Switch S3 Power Supply Board PWB-C Upper Left Door Interlock Switch S4 Noise Filter Board PWB-D Lower Left Door Interlock Switch S5 Symptom Step...

  • Page 83: Image Failure

    IMAGE FAILURE 1155SBT0501A 5-1. Image Failure Troubleshooting • Image failures have many possible causes. For troubleshooting, it is necessary to determine whether a failure is attributable to: A basic cause or any other cause The input system (IR, memory) or output system (engine, memory). In this chapter, troubleshooting is divided into “initial checks”...

  • Page 84: Troubleshooting Procedures By Image Failure

    1155SBT0503A 5-3. Troubleshooting Procedures by Image Failure <Image Failure Samples> 1) Blank copy 2) Black copy 3) Low image density 4) Foggy background 5) Black streaks or bands 6) Black spots 7) Blank streaks or bands 8) Void areas 9) Smear on back 10) Uneven image density 11) Gradation reproduction failure 12) Rough image 13) Periodically uneven image...
  • Page 85 1155SBT050301A 1) Blank Copy Section Step Check Item Result Action Is the PC Drum Charge Corona installed cor- Install correctly. rectly? Are the Comb Electrode and grid mesh nor- Check and change if nec- mal? essary. Is the wiring between PC Drum Charge/ Correct the wiring.
  • Page 86 1155SBT050302A 2) Black Copy Section Step Check Item Result Action Is the PC Drum properly grounded? Clean or change the PC Drum ground plate. Is the developing bias contact normal? Clean or change the devel- oping bias contact. Engine Is the wiring between Image Transfer/Paper Correct the wiring.
  • Page 87 Section Step Check Item Result Action Select “Adjust” and “Printer,” change the This completes the proce- value for “Image Density” to a greater one (on dure. Engine the + end), and make a copy. Is the image Change HV1 or HV2. density higher on the copy than before? Select “Tech.
  • Page 88 Section Step Check Item Result Action Are the Comb Electrode and grid mesh dirty? Clean or change the PC Drum Charge Corona. Check the toner suction Engine mechanism for operation. Is the Upper Fusing Roller dirty with foreign Clean or change the Upper matter? Fusing Roller.
  • Page 89 1155SBT050307A 7) Blank Streaks or Bands Section Step Check Item Result Action Is the PC Drum surface scratched or dirty? Clean or change the PC Drum. Are the PC Drum Paper Separator Fingers Clean or change the sepa- dirty or deformed? rator fingers.
  • Page 90 Section Step Check Item Result Action Is the paper guide shorted to the frame? Close the circuit properly. Is the Image Transfer Corona installed prop- Install the corona properly. erly? Is the Image Transfer Corona wire dirty? Clean or change the Image Engine Transfer Corona.
  • Page 91 1155SBT050310A 10) Uneven Image Density Section Step Check Item Result Action Is the PC Drum grounded properly? Clean or change the PC Drum ground plate. Are the Comb Electrode and grid mesh dirty Clean or change the PC or deteriorated? Drum Charge Corona.
  • Page 92 1155SBT050311A 11) Gradation Reproduction Failure Section Step Check Item Result Action Is the Shading Sheet dirty? Clean the sheet. Is the image improved by loading new paper? Change the copy paper and instruct the user in how to store paper. Is the gradation unclear in the high-density Decrease the value for "γ...
  • Page 93 1155SBT050313A 13) Periodically Uneven Image Section Step Check Item Result Action Are the Ds Rolls of the Developing Unit dirty Clean or change the rolls. with foreign matter or scratched? Are the Developing Unit drive gears cracked Clean or change the defec- or dirty with foreign matter? tive gear.
  • Page 94 1155SBT000EA Copyright 1998 MINOLTA Co., Ltd. Printed in Japan Use of this manual should be strictly supervised to avoid disclosure of confidential information. 1155-7998-11 98022370 MINOLTA Co., Ltd. 14413...

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