Minolta Di620 Operating instructions

Di620
TROUBLESHOOTING
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i
1155SBT000BA CONTENTS
1. INTRODUCTION
1-1. General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-1
1-2. How to Use This Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-1
1-3. Reading the Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-1
2. I/O CHECK
2-1. Controlled Parts Check Procedure . . . . . . . . . . . . . . . . . . . . . . . T-2
2-2. I/O Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-3
3. PAPER TRANSPORT FAILURE
3-1. Paper Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-7
3-2. Types of Misfeed Detection and Detection Timings. . . . . . . . . . T-10
3-3. Misfeed Clearing Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . T-12
1) Copier Take-Up Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-12
2) Transport/Separator Misfeed. . . . . . . . . . . . . . . . . . . . . . . . . T-14
3) Multi Bypass Misfeed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-17
4) Fusing/Exit Misfeed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-19
5) Duplex Unit Take-Up Misfeed . . . . . . . . . . . . . . . . . . . . . . . . T-21
4. MALFUNCTION
4-1. Detection Timing by Malfunction Code . . . . . . . . . . . . . . . . . . . T-25
4-2. Troubleshooting Procedures by Malfunction Code. . . . . . . . . . . T-36
1) C0000 : Fusing Motor M3’s Failure to Turn . . . . . . . . . . . . . . T-36
C0010: PC Drum Drive Motor M2’s Failure to Turn
2) C0020 : Paper Take-Up Motor M21’s Failure to Turn. . . . . . . T-38
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
3) C0049: PH Cooling Fan Motor M19’s Failure to Turn . . . . . . T-40
C004A: PC Drum Cooling Fan Motor M17’s Failure to Turn
4) C004B: CCD Cooling Fan Motor M32’s Failure To Turn . . . . T-42
C004C: Ozone Ventilation Fan Motor M12’s Failure to Turn
5) C004D: Power Supply Unit Cooling Fan Motor 3 M18’s
Failure to Turn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-44
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

ii
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-47
8) C0100 : PC Drum Charge Comb Cleaning Motor M7’s
Failure to Turn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-48
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
9) C0200: PC Drum Charge Corona Leak Detected . . . . . . . . T-50
C0210: Image Transfer Corona Leak Detected
C0220: Developing Bias Leak Detected
C0230: Paper Separator Corona Leak Detected
10) C0400: Exposure Lamp FL1’s Failure to Turn ON . . . . . . . . T-52
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
11) C0500: Warming-up Failure . . . . . . . . . . . . . . . . . . . . . . . . . T-54
C0510 : Abnormally Low Fusing Temperature
C0520: Abnormally High Fusing Temperature
C0540: Fusing Roller Thermistor Loading Failure
C0550: Hard Protect Detected
12) C0600: Scanner Motor M31 Malfunction . . . . . . . . . . . . . . . T-58
C0602: Cable Unwound
C0650: SHOME Signal Error
13) C0910: 2nd Drawer Lift-Up Failure. . . . . . . . . . . . . . . . . . . . T-60
C0911: 2nd Drawer Lock Release Failure (Inch Areas)
C0914: 2nd Drawer Lift-Up Motor M25’s Failure to Turn
14) C0920: 1st Drawer Lift-Up Failure . . . . . . . . . . . . . . . . . . . . T-63
C0921: 1st Drawer Lock Release Failure (Inch Areas)
C0924: 1st Drawer Lift-Up Motor M24’s Failure to Turn
15) C0990: 3rd Drawer Lift-Up Failure . . . . . . . . . . . . . . . . . . . . T-66
C0994: 3rd Drawer Elevator Motor M28’s Failure to Turn

iii
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. . . . . . . T-72
19) C0F24: AIDC Sensor UN6 Contamination Correction
Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-73
20) C0F32: ATDC Sensor UN4 Failure. . . . . . . . . . . . . . . . . . . . T-74
C0F33: Abnormally Low T/C as Detected by ATDC
Sensor UN4
C0F34: T/C Recovery Failure as Detected by ATDC
Sensor UN4
21) C10∗∗~C14∗∗ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-75
22) The Copier Does not Turn ON. . . . . . . . . . . . . . . . . . . . . . . .T-77
5. IMAGE FAILURE
5-1. Image Failure Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . T-78
5-2. Initial Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-78
5-3. Troubleshooting Procedures by Image Failure. . . . . . . . . . . . . . T-79

T-1
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. Before attempting to replace parts and unplug connectors, make sure that the power cord of the
copier has been unplugged from the wall outlet.
3. Never create a closed circuit across connector pins except those specified in the text and on the
printed circuit.
4. When creating a closed circuit and measuring a voltage across connector pins specified in the text,
be sure to use the green wire (GND).
5. When the user is using a word processor or personal computer from a wall outlet of the same line,
take necessary steps to prevent the circuit breaker from opening due to overloads.
6. Keep all disassembled parts in good order and keep tools under control so that none will be lost or
damaged.
1139SBT0102A
1-2. How to Use This Book
1. If a component on a PWB or any other functional unit including a motor is defective, the text only
instructs you to replace the whole PWB or functional unit and does not give troubleshooting
procedures applicable within the defective unit.
2. All troubleshooting procedures contained herein assume that there are no breaks in the harnesses
and cords and all connectors are plugged into the right positions.
3. For the removal procedures of covers and parts, see DIS/REASSEMBLY, ADJUSTMENT.
4. The troubleshooting procedures are given in the order of greater frequency of trouble or order of
operation.
5. The procedures preclude possible malfunctions due to noise and other external causes.
1139SBT0103A
1-3. Reading the Text
1. The paper transport failure troubleshooting procedures are given according to the symptom. First
identify the location where the paper is present and start the procedure for that particular location.
For malfunction troubleshooting, start with step 1 and onward.
2. Make checks in numerical order of steps and, if an item is checked okay, go to the next step.
1INTRODUCTION
Pattern 1
Go to step 2 if you answered NO.
Step Check Item Result Action
1 Is ...? YES Do this.
2
Pattern 2
Go to step 2 if it checks okay.
Step Check Item Result Action
1 Is ...? YES Do this.
NO Check that.
2

T-2
1155SBT0201A
2-1. Controlled Parts Check Procedure
<Procedure>
1) On a circuit diagram accompanying the text, locate the controlled part which is probably defective
when a misfeed or malfunction occurs.
2) Select the “I/O Check” function of the Tech. Rep. mode and access the screen which contains the
controlled part picked out in step 1 above. (See SWITCHES ON PWBs/TECH. REP. MODE.)
3) Check the input port data to determine whether a signal is properly input to the controlled part.
<Controlled Part Check Procedure Through Checking Input Port Data>
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. Rep. to determine whether signals are properly input to a controlled part.
2I/O CHECK
When a paper misfeed occurs in the paper take-up section of the copier, 1st Drawer Paper Take-Up
Sensor PC32 is considered to be responsible for it.
<Procedure>
1) Remove the sheet of paper misfed.
2) From the I/O check list, it is found that the signal input to PC32 is “Take-Up” of “1st Drawer.”
3) Select “I/O Check” of the Tech. Rep. mode and access the screen which contains “Take-Up” of
“1st Drawer.”
4) Check that the input port data of “Take-Up” of “1st Drawer” on the screen is “0” (sensor is
unblocked).
5) Move the PC32 actuator to block the sensor.
6) Check, at this time, that the input port data of “Take-Up” of “1st Drawer” on the screen changes
from “0” to “1.”1: PC32 is operational. 0: PC32 is faulty.
Example:

T-3
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.
1155T024CC1155T021CC
1155T025CC1155T022CC
1155T026CC1155T023CC

T-4
<I/O Check List>
Symbol Panel Display Parts/Signal Name
Operation Charac-
teristics/Panel Dis-
play IC
No. Port No. CN/PJ No.
10
PC44 1st
Drawer Set 1st Drawer Set Sen- sor In position Out of position IC1F PC1 PJ15F-5B
PC32 Take-up 1st Drawer Paper
Take-Up Sensor Paper present Paper not present IC1F PC3 PJ15F-2A
PC40 Lift-up 1st Drawer Paper
Lift-Up Sensor At upper limit Not at upper limit IC1F PD1 PJ15F-8A
PC48 Paper Empty 1st Drawer Paper
Empty Sensor Paper present Paper not present IC1F PC2 PJ15F-8B
PC36 Leading Edge Vertical Transport
Sensor 1 Paper present Paper not present IC1F PD0 PJ15F-5A
PC25 Lift-up Pulse 1st Drawer Lift-Up
Motor Pulse Sensor Blocked Unblocked IC4A P226 PJ4A-12
UN7 Paper Descent 1st Drawer Paper
Descent Key ON OFF IC4A P224 PJ5A-2A
PC18 Lower 1st Drawer Lower
Position Sensor Blocked Unblocked IC4A P225 PJ5A-8B
PWB-E1 Lower Empty 1st Drawer Paper
Empty Key Paper present Paper not present IC4A P227 PJ5A-1A
PC45 2nd
Drawer Set 2nd Drawer Set Sen- sor In position Out of position IC2F PA0 PJ14F-5B
PC33 Take-up 2nd Drawer Paper
Take-Up Sensor Paper present Paper not present IC2F PA2 PJ14F-2A
PC41 Lift-up 2nd Drawer Paper
Lift-Up Sensor At upper limit Not at upper limit IC1F PC0 PJ14F-8A
PC49 Paper Empty 2nd Drawer Paper
Empty Sensor Paper present Paper not present IC2F PA1 PJ14F-8B
PC37 Leading Edge Vertical Transport
Sensor 2 Paper present Paper not present IC2F PA3 PJ14F-5A
PC26 Lift-up Pulse 2nd Drawer Lift-Up
Motor Pulse Sensor Blocked Unblocked IC4A P232 PJ4A-13
UN8 Paper Descent 2nd Drawer Paper
Descent Key ON OFF IC4A P230 PJ5A-4A
PC19 Lower 2nd Drawer Lower
Position Sensor Blocked Unblocked IC4A P231 PJ5A-6B
PWB-E2 Lower Empty 2nd Drawer Paper
Empty Key Paper present Paper not present IC4A P233 PJ5A-3A
PC46 3rd
Drawer Set 3rd Drawer Set Sen- sor In position Out of position IC2F PB3 PJ13F-5B
PC34 Take-up 3rd Drawer Paper
Take-Up Sensor Paper present Paper not present IC2F PC1 PJ13F-2A
PC42 Lift-up 3rd Drawer Paper
Lift-Up Sensor At upper limit Not at upper limit IC2F PC0 PJ13F-8A
PC50 Paper Empty 3rd Drawer Paper
Empty Sensor Paper present Paper not present IC2F PC3 PJ13F-8B
PC38 Leading Edge Vertical Transport
Sensor 3 Paper present Paper not present IC2F PC2 PJ13F-5A
Lift-up Pulse
4th
Drawer Set
Take-up
Lift-up
Paper Empty
Leading Edge
Lift-up Pulse
PC6 Manual Paper
Empty Empty Manual Feed Paper
Empty Sensor Paper present Paper not present IC4A P220 PJ7A-9B

T-5
Symbol Panel Display Parts/Signal Name
Operation Charac-
teristics/Panel Dis-
play IC
No. Port No. CN/PJ No.
10
S12 Cabi-
net Universal Size
1Paper Size Detect- ing Switch FD1 ON OFF IC2F PF0 PJ11F-9
S13 Universal Size
2Paper Size Detect- ing Switch FD2 ON OFF IC2F PF1 PJ11F-7
S14 Universal Size
3Paper Size Detect- ing Switch FD3 ON OFF IC2F PF2 PJ11F-5
PC53 Toner Box Set Toner Collecting Bot-
tle Set Sensor In position Out of position IC2F PF3 PJ11F-2
Duplex Set Horizontal Transport
Unit Set Switch In position Out of
position IC4A P206 PJ7A-6B
Area 1 Marketing Area 1
Switch 3-drawer type 4-drawer type IC4A P245 PJ5A-5A
Area 2 Marketing Area 2
Switch MJ/MH MC IC4A P246 PJ5A-6A
PC1 LCT Raised Posi-
tion Paper Plate Raised Position Sensor At upper limit Not at upper limit IC1A PC0 PJ2A-8A
PC6 Lowered Posi-
tion Paper Plate Lowered Position Sensor At lower limit Not at lower limit IC1A PG3 PJ2A-5A
PC4 Take-up Paper Feed Sensor Paper not
present Paper present IC1A PG0 PJ2A-2B
PC5 Door Tray Door Sensor In position Out of
position IC1A PG2 PJ2A-2A
S1B Descent SW Paper Plate Descent
Switch ON OFF IC1A PG1 PJ3A-2
PC3 Set Set Sensor In position Out of
position IC1A PC2 PJ2A-5B
PC2 Paper Empty Paper Empty Sensor Paper not
present Paper present IC1A PC1 PJ2A-8B
PC42 LCC Raised Posi-
tion 3rd Drawer Paper Lift-Up Sensor At upper limit Not at upper limit IC2F PC0 PJ13F-8A
PC20 Lowered Posi-
tion 3rd Drawer Lower Position Sensor At lower limit Not at lower limit IC4A P235 PJ4A-9
PC34 Take-up 3rd Drawer Paper
Take-Up Sensor Paper present Paper not present IC2F PC1 PJ13F-2A
PC50 Paper Empty 3rd Drawer Paper
Empty Sensor Paper present Paper not present IC2F PC3 PJ13F-8B
PC23 Shift Tray 3rd Drawer Shifter Return Position Sen-
sor At return
position Not at
return
position IC4A P237 PJ4A-7
UN9 Paper Descent 3rd Drawer Paper
Descent Key ON OFF IC4A P234 PJ4A-10
PC31 Shift Tray
Empty 3rd Drawer Shift Tray Paper Empty Sensor Paper present Paper not present IC4A P242 PJ4A-4
PC22 Shift Tray
Home 3rd Drawer Shifter
Home Position Sen-
sor At home Not at
home IC4A P236 PJ4A-8
PWB-E Elev. Tray
Empty 3rd Drawer Paper Empty Board Paper present Paper not present IC4A P240 PJ4A-6
PC24 Set 3rd Drawer Set Sen-
sor In position Out of position IC2F PB3 PJ8F-2
PC38 Leading Edge Vertical Transport
Sensor 3 Paper present Paper not present IC2F PC2 PJ13F-5A
PC29 Elev. Mtr Pulse 3rd Drawer Elevator
Motor Pulse Sensor Blocked Unblocked IC4A P241 PJ4A-5
PC30 Shift Mtr Pulse 3rd Drawer Shift
Motor Pulse Sensor Blocked Unblocked IC4A P243 PJ4A-3
PC21 Lower Overrun 3rd Drawer Overrun
Detecting Sensor At lower limit Not at lower limit IC4A P244 PJ4A-2
PC52 Plate Position 3rd Drawer Shift
Gate Position Sensor Blocked Unblocked IC1A AN16 PJ4A-1

T-6
Symbol Panel Display Parts/Signal Name
Operation Charac-
teristics/Panel Dis-
play IC
No. Port No. CN/PJ No.
10
TH1 Fusing
Unit Upper Roller
(°C) Upper Fusing Roller Thermistor Voltage value (A/D converted) IC1A ANI0 PJ3A-9B
TH2 Lower Roller
(°C) Lower Fusing Roller Thermistor Voltage value (A/D converted) IC1A ANI1 PJ3A-10B
Thermistor Set Thermistor Set
Switch In position Out of
position IC1A P17 PJ3A-1B
UN4 Devel-
oping ATDC-S ATDC Sensor Voltage value
(A/D converted) IC1A ANI3 PJ8A-10B
UN6 AIDC-S AIDC Sensor Voltage value
(A/D converted) IC1A ANI2 PJ10A-1B
S7 Sub Hopper Sub Hopper Toner
Empty Switch Toner loaded Toner empty IC5A P303 PJ8A-12B
PC4 Toner Bottle
Set Toner Bottle Home Position Sensor At home Not at home IC5A P321 PJ2A-5A
PC16 HV Clean
(Charge) Drum Comb Clean-
ing Home Position
Sensor At home Not at
home IC3A P154 PJ9A-14A
PC17 Clean (Trans.) Transfer/Separator Wire Cleaning Home
Position Sensor At home Not at
home IC3A P155 PJ3A-4B
PHC-ITI PHC ITI signal ON OFF IC3A P121 PJ12A-29A
PC8 Doors Front (Upper) UpperFrontDoorSet
Sensor When opened When closed IC5A P320 PJ2A-2A
S2 Front (Lower) Lower Front Door
Interlock Switch When opened When closed IC5A P325 PJ6A-14A
S3 Take-up Right Door Interlock
Switch When opened When closed IC4A P247 PJ3A-13B
S4 Exit Upper Left Door
Interlock Switch When opened When closed IC5A P300 PJ10A-12B
S5 Turn Over Lower Left Door
Interlock Switch When opened When closed IC5A P322 PJ8A-10A
Finisher set Finisher Set Switch In position Out of
position IC5A P301 PJ8A-4A
S1 Power Switch Power Switch ON OFF IC5A P326 PJ6A-15A
S6 Pre-drive Off
(F) Predrive OFF Front Switch Closed Open IC4A P205 PJ2A-8A
PC5 Pre-drive Off
(R) Predrive OFF Rear Sensor Blocked Unblocked IC4A P223 PJ9A-11B
PC2 Paper
Pas-
sage
Timing Roller Paper Leading Edge
Sensor Paper present Paper not present IC4A P200 PJ3A-2B
PC1 Roller Front Transport Roller Sen-
sor Paper present Paper not present IC4A P201 PJ3A-3B
PC13 Trans.
Entrance Duplex Unit Horizon-
tal Transport Entry
Sensor Paper
present Paper not present IC4A P222 PJ7A-4B
PC12 Horiz. Transprt Duplex Unit Horizon-
tal Transport Sensor Paper present Paper not present IC4A P221 PJ7A-3B
S10 Exit Paper Exit Switch Paper
present Paper not present IC5A P307 PJ2A-13A
PC11 Reverse
Entrance Turnover Feed Entry Sensor Paper present Paper not present IC5A P323 PJ6A-14B
PC14 Reverse Exit Turnover/Exit Sensor Paper
present Paper not present IC5A P324 PJ6A-6B
PC57 Duplex
Remaining Turnover Feed Jam Sensor Paper present Paper not present IC1A INTP 5PJ6A-11B
PC56 Horiz. Remain-
ing Duplex Unit Horizon-
tal Transport Jam
Sensor Paper
present Paper not present IC1A S10 PJ7A-5B
VR Universal CD-
VR Universal Tray Width Detection Resistor Voltage value (A/D converted) IC1A ANI4 PJ8A-8B
UN13 IR Thermistor Exposure Lamp
Heater Voltage value (A/D converted) IC1A ANI5 PJ7A-10A

T-7
1156SBT0301A
3-1. Paper Misfeed
When a paper misfeed occurs, the Touch Panel shows the corresponding message, misfeed location,
and paper location.
3PAPER TRANSPORT FAILURE
Blinking Misfeed location
Lit Paper location
1155O632CA
1
2
3
4
5
7
6
8
912
10
11
13
15
19
14
21
18
20
16
17

T-8
∗When an option is installed.
<Misfeed Display Resetting Method>
Lit/Blinking LED Misfeed/Paper Location Ref. Page OP
1ADF take-up See the relevant
option service
manual.
∗
2ADF turnover/exit ∗
3ADF transport ∗
4Multi bypass take-up 3)
5Copier transport/separator 2)
6Copier fusing 4)
7Duplex horizontal transport 5)
8Duplex turnover 5)
91st Drawer take-up 1)
10 2nd Drawer take-up 1)
11 3rd Drawer take-up 1)
12 Vertical transport (lower right of copier) 1)
13 LCC
See the relevant
option service
manual.
∗
14 Entrance to Non-Sort/Finisher Tray ∗
15 Vertical transport through Finisher ∗
16 Entrance to Elevator Tray ∗
17 Paper Folding Unit ∗
18 Exit to Non-Sort Tray ∗
19 Copy stack transport ∗
20 Exit to Elevator Tray ∗
21 Exit to Finisher Tray ∗
Misfeed in the copier Opentherelevantdoors,removeallsheetsofpaper
misfed and left inside, and then close all doors.
Misfeed in the option Open and close or re-connect the option.

T-9
<Misfeed Detection Sensor Layout>
Turnover/Exit Sensor
PC14
1155G001AA
Turnover Feed Jam
Sensor PC57
3rd Drawer Paper Take-Up
Sensor PC34
Vertical TransportSensor 2
PC37
Vertical TransportSensor 1
PC36
1st Drawer Paper Take-Up
Sensor PC32
Manual Feed Paper Empty
Sensor PC6
Transport Roller Sensor
PC1
Paper Leading Edge Sensor
PC2
Paper Exit Switch
S10
Turnover Feed Entry
Sensor PC11
Vertical TransportSensor 3
PC38
2nd Drawer Paper Take-Up
Sensor PC33
Duplex Unit Horizontal Transport
Jam Sensor PC56
DuplexUnitHorizontal
Transport Entry
Sensor PC13
Duplex Unit Horizontal Transport Sensor
PC12

T-10
1155SBT0302A
3-2. Types of Misfeed Detection and Detection Timings
<Copier Take-Up Misfeed>
<Multi Bypass Misfeed>
<Transport/Separator Misfeed>
<Fusing/Exit Misfeed>
Type Detection Timing
Paper take-up failure
detection 1st Drawer Paper Take-Up Sensor PC32 is not blocked ([L]) even after the lapse of approx. 0.3 sec. after 1st Drawer Paper Take-Up Clutch CL3 has
been energized (after two paper take-up retry sequences).
Note: This also applies to the 2nd and 3rd Drawers.
Paper take-up trailing edge
detection PC32 is not unblocked ([H]) even after the lapse of T (which varies depending on the paper size) after it has been blocked ([L]).
Note: This also applies to the 2nd and 3rd Drawers.
Leading edge detection by
Transport Roller Sensor
PC1
PC1 is not blocked ([L]) even after the lapse of approx. 0.9 sec. after 1st
Drawer Paper Take-Up Sensor PC32 has been blocked ([L]).
PC1 is not blocked ([L]) even after the lapse of approx. 1.2 sec. after 2nd
Drawer Paper Take-Up Sensor PC33 has been blocked ([L]).
PC1 is not blocked ([L]) even after the lapse of approx. 1.5 sec. after 3rd
Drawer Paper Take-Up Sensor PC34 has been blocked ([L]).
Type Detection Timing
Bypass paper take-up fail-
ure detection
PC1 is not blocked ([L]) even after the lapse of approx. 0.5 sec. after Man-
ual Feed Paper Take-Up Clutch CL1 has been energized (after one paper
take-up retry sequence).
Type Detection Timing
Leading edge detection by
Paper Leading Edge Sen-
sor PC2
PC2 is not blocked ([L]) even after the lapse of approx. 0.4 sec. after PC1
has been blocked ([L]).
Leading edge detection by
Paper Exit Switch S10 S10 is not actuated even after the lapse of approx. 1.9 sec. after Synchro- nizing Motor M5 has been energized.
Leading edge detection by
Turnover Feed Entry Sen-
sor PC11
PC11 is not blocked ([L]) even after the lapse of approx. 2.3 sec. after M5
has been energized.
Type Detection Timing
Trailing edge detection by
Paper Exit Switch S10
S10 is not deactuated even after the lapse of approx. 2.0 sec. after PC2
has been unblocked ([H]) when the paper is fed out onto the Upper Exit
Tray.

T-11
<Duplex Unit Paper Take-Up Misfeed>
Type Detection Timing
Trailing edge detection by
Turnover Feed Entry Sen-
sor PC11
PC11 is not unblocked ([H]) even after the lapse of approx. 2.3 sec. after
Paper Leading Edge Sensor PC2 has been unblocked ([H]) when the
paper is fed out onto the Lower Exit Tray or stored in the Duplex Unit.
Leading edge detection by
Duplex Unit Horizontal
Transport Entry Sensor
PC13
PC13 is not blocked ([L]) even after the lapse of approx. 0.7 sec. after
PC11 has been unblocked ([H]).
Leading edge detection by
Transport Roller Sensor
PC1
PC1 is not blocked ([L]) even after the lapse of approx. 2.5 sec. after PC13
has been blocked ([L]) when the paper is stored into the Duplex Unit.
Leading edge detection by
Turnover/Exit Sensor PC14 PC14 is not blocked ([L]) even after the lapse of approx. 0.9 sec. after the paper, which is to be turned over and fed out through the lower exit port,
has unblocked ([H]) PC11.
Leading edge detection by
Turnover/Exit Sensor PC14
PC14 is not blocked ([L]) even after the lapse of approx. 0.6 sec. after the
paper, which is to be fed out through the lower exit port, has blocked
PC11.
Trailing edge detection by
Turnover/Exit Sensor PC14 PC14 is not unblocked ([H]) even after the lapse of approx. 1.6 sec. after it has been blocked ([L]).

T-12
1155SBT0303A
3-3. Misfeed Clearing Procedures
1) Copier Take-Up Misfeed
Relevant Electrical Parts
1st Drawer Paper Take-Up Clutch CL3
2nd Drawer Paper Take-Up Clutch CL4
3rd Drawer Paper Take-Up Clutch CL5
1st Drawer Paper Take-Up Sensor PC32
2nd Drawer Paper Take-Up Sensor PC33
3rd Drawer Paper Take-Up Sensor PC34
Vertical Transport Motor M22
Vertical Transport Sensor 1 PC36
Vertical Transport Sensor 2 PC37
Vertical Transport Sensor 3 PC38
Master Board PWB-A
Drawer S/P Board PWB-F
1155C25TAA

T-13
<Copier Take-Up Misfeed Clearing Procedure>
Symptom Step Check Item Result Action
•Paper is not
taken up at all.
•Paper is at a
stopbeforethe
Vertical Trans-
port Sensor.
1 Does the paper being used meet
product specifications? NO Instruct the user to use the paper that meets product
specifications.
2 Is the paper curled, wavy, or damp? YES Change the paper. Instruct
the user on the storage of
paper.
3 Are the Edge Guide and Trailing Edge
Stop (of the drawer) positioned to the
exact sizes of the paper used?
NO Slide the guides to the exact
size of the paper.
4 Are the Paper Take-Up Roll and Paper
Separator Roll deformed, worn, or
dirty with paper dust?
YES Clean or change the defec-
tive roll.
5 Is the Paper Take-Up Guide Plate dirty
or deformed? YES Clean or change the guide plate.
6 When the 1st Drawer is use
Check CL3 for operation.
Does the voltage across PJ15F-2B on
PWB-F and GND change from DC24V
to DC0V when the Start key is
pressed?
YES Change CL3.
NO Change PWB-F or PWB-A.
7 When the 2nd Drawer is use
Check CL4 for operation.
Does the voltage across PJ14F-2B on
PWB-F and GND change from DC24V
to DC0V when the Start key is
pressed?
YES Change CL4.
NO Change PWB-F or PWB-A.
8 When the 3rd Drawer is use
Check CL5 for operation.
Does the voltage across PJ13F-2B on
PWB-F and GND change from DC24V
to DC0V when the Start key is
pressed?
YES Change CL5.
NO Change PWB-F or PWB-A.
Paper is at a
stop in the verti-
cal transport
section.
1 Are the Vertical Transport Rollers
deformed, worn, or dirty with paper
dust?
YES Clean or change the Vertical
Transport Rollers.
2 Is the Paper Take-Up or Vertical
Transport Guide Plate deformed or
dirty?
YES Clean or change the defec-
tive guide plate.
3 Does M22 turn when the Start key is
pressed? NO Check for overload. Then, check step 5 and onward.
4 Is each of the voltages across PJ17F-
1 on PWB-F and GND and thatacross
PJ17F-2 and GND DC38V?
YES Change M22.
NO Change PWB-A or PWB-F.
5 Is each Paper Take-Up Sensor (PC32,
33, 34) fully operational? Make the
input port check using “I/O Check.”
NO Check the actuator of the
defective sensor for opera-
tion and, if it is okay, change
the sensor.
6 Is each Vertical Transport Sensor
(PC36, 37, 38) fully operational?
Make the input port check using “I/O
Check.”
YES Change PWB-F or PWB-A.
NO Check the actuator of the
defective sensor for opera-
tion and, if it is okay, change
the sensor.

T-14
2) Transport/Separator Misfeed
Relevant Electrical Parts
Transport Motor M23
Transport Roller Sensor PC1
Synchronizing Motor M5
Paper Leading Edge Sensor PC2
Separator Finger Solenoid SL4
Suction Fan Motor M14
Master Board PWB-A
Synchronizing Motor Control Board PWB-T
Drawer S/P Board PWB-F
1155C02TAA

T-15
<Transport/Separator Misfeed clearing Procedure>
Symptom Step Check Item Result Action
Paper is at a
stop at the
Transport Roll-
ers.
1 Are the Transport Rollers deformed,
worn, or dirty with paper dust? YES Clean or change the Trans- port Rollers.
2 Does M23 turn when the Start key is
pressed? NO Check for overload and then check step 4.
3 Is the voltage across PJ16F-1 on
PWB-F and GND and that across
PJ16F-2 and GND DC38V?
YES Change M23.
NO Change PWB-A or PWB-F.
4 Is PC1 fully operational? Make the
input port check using “I/O Check.” YES Change PWB-A.
NO Check the PC1 actuator for
operation and, if it is okay,
change PC1.
Paper is at a
stop at the Syn-
chronizing Roll-
ers.
1 Are the Synchronizing Rollers
deformed, worn, or dirty with paper
dust?
YES Clean or change the Syn-
chronizing Rollers.
2 Is a proper length of loop formed
before the Synchronizing Rollers? NO Select “Tech. Rep.,” “Tech. Rep. Choice,” “Printer,” and
“Loop Adjustment,” in that
order to make the loop
adjustment.
3 Does M5 turn when the Start key is
pressed? NO Check for overload and then check step 5.
4 Is the voltage across PJ13T-1 on
PWB-T and GND and that across
PJ13T-2 and GND DC38V?
YES Change PWB-A or M5.
NO Change PWB-T.
5 Is PC2 fully operational? Make the
input port check using “I/O Check.” YES Change PWB-A.
NO Check the PC2 actuator for
operation and, if it is okay,
change PC2.

T-16
Symptom Step Check Item Result Action
Paper is at a
stopnearthePC
Drum.
1 Is the Pre-Image Transfer Guide Plate
dirty or deformed, or has the seal
been separated?
YES Clean or change the guide
plate.
2 Are the Image Transfer/Paper Separa-
tor Corona Wires dirty or deformed? YES Clean or change the defec- tive corona wire.
3 Is the paper guide above the Paper
Separator Corona dirty or deformed? YES Clean or change the paper guide.
Paper is wedged
at the PC Drum
Paper Separator
Fingers.
1 Are the PC Drum Paper Separator
Fingers dirty or deformed? YES Clean or change the separa- tor fingers.
2 Do the PC Drum Paper Separator Fin-
gers move smoothly when operated
manually?
NO Change the separator fin-
gers.
3 Is there a gap between the PC Drum
Paper Separator Fingers and the sur-
face of the PC Drum when step 2 is
performed again?
YES Adjust the position of the PC
Drum Paper Separator Fin-
gers.
4 Check SL4 for operation.
Does the voltage across PJ10A-8B on
PWB-A and GND change from
DC24V to DC0V when the Start keyis
pressed?
YES Change SL4.
NO Change PWB-A.
Paper is at a
stop on the Suc-
tion Belts.
1 Do the Suction Belts turn when PC
Drum Drive Motor M2 is energized? NO Check the drive gear engagement and timing belt.
2 Check M14 for operation.
Does the voltage across PJ3A-7B on
PWB-A and GND change from DC0V
to DC3V when the Start key is
pressed?
YES Check the Suction Belts and
change M14.
NO Change PWB-A.