Xerox MF Series Technical Document page 116

1-2. Removal of Units ......................................................................................D-4
(1) Removal of the PH Unit ...................................................................D-4
1-3. Disassembly of the Engine .......................................................................D-5
(1) Removal of the Main Motor ..............................................................D-5
(2) Removal of the Paper Empty Sensor ...............................................D-5
(3) Removal of the Paper Take-Up Solenoid ........................................D-6
(4) Removal of the Paper Take-Up Clutch Gear ...................................D-7
(5) Removal of the Torque Limiter .........................................................D-8
(6) Disassembly of the Fusing Unit .......................................................D-9
TROUBLESHOOTING
1. INTRODUCTION ..............................................................................................T-1
1-1. Electric Components Check Procedures .................................................T-1
(1) Sensors ............................................................................................T-1
(2) Switches ...........................................................................................T-2
(3) Solenoids .........................................................................................T-2
(4) Motors .............................................................................................T-3
1-2. Overall Control Configuration ...................................................................T-4
2. PAPER MISFEED ............................................................................................T-5
2-1. Initial Check Items ....................................................................................T-5
2-2. Locations of Misfeed Detection Sensors ..................................................T-6
2-3. Misfeed Detection Timing and Troubleshooting Procedures ...................T-7
(1) Paper Take-Up/Transport Misfeed ...................................................T-7
(2) Fusing/Exit Misfeed ..........................................................................T-8
3. MALFUNCTIONS/WARNING ..........................................................................T-9
3-1. List of Malfunctions ..................................................................................T-9
3-2. Malfunction Detection Timing and Troubleshooting Procedures ..............T-11
(1) Polygon Motor malfunction ..............................................................T-11
(2) Laser malfunction .............................................................................T-12
(3) Cooling Fan Motor malfunction ........................................................T-12
(4) Warm-up failure ...............................................................................T-13
(5) Abnormally low fusing temperature ..................................................T-14
(6) Abnormally high fusing temperature ................................................T-15
(7) High voltage failure ..........................................................................T-15
(8) Controller-related malfunctions ........................................................T-16
4. MALFUNCTIONS RELATED TO POWER SUPPLY .......................................T-17
4-1. Power is not Turned ON. ..........................................................................T-17
5. IMAGE QUALITY PROBLEMS ........................................................................T-18
5-1. Troubleshooting Procedure by Image Quality Problem ...........................T-18
(1) Blank print and black print ................................................................T-18
(2) Void areas ........................................................................................T-19
(3) Back marking ...................................................................................T-19
(4) Low image density ...........................................................................T-20
(5) Foggy background ...........................................................................T-21
(6) White lines, white bands ..................................................................T-21
(7) Black lines, black bands ...................................................................T-22
(8) Offset
(9) Uneven image ..................................................................................T-23
.............................................................................................T-22
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