Minolta CF910 Service Manual page 158

1. SERVICE INSTRUCTIONS ............................................................................. D-1
1-1. IDENTIFICATION OF FUSES AND CIRCUIT BREAKERS .................... D-1
1-2. PRECAUTIONS FOR HANDLING THE LASER EQUIPMENT ............... D-1
1-3. INSTRUCTIONS FOR HANDLING THE PWBs WITH MOS ICs ............. D-2
1-4. HANDLING OF THE PC DRUM .............................................................. D-2
1-5. PARTS WHICH MUST NOT BE TOUCHED ........................................... D-4
(1) Red Painted Screws ........................................................................ D-4
(2) Variable Resistors on Board ............................................................ D-4
(3) Other Screws ................................................................................... D-4
2. DISASSEMBLY/REASSEMBLY ......................................................................D-5
2-1. DOORS, COVERS, AND EXTERIOR PARTS: IDENTIFICATION
AND REMOVAL PROCEDURES ............................................................ D-5
2-2. REMOVAL OF CIRCUIT BOARDS AND OTHER ELECTRICAL
COMPONENTS ....................................................................................... D-7
2-3. REMOVAL OF UNITS ............................................................................. D-9
(1) Removal of the Toner Hopper Unit .................................................. D-9
(2) Removal of the PC Unit ................................................................... D-10
(3) Removal of the Developing Unit ...................................................... D-12
(4) Removal of the Fusing Unit and Transfer Unit ................................ D-13
(5) Removal of the Multi Bypass Unit .................................................... D-14
(6) Removal of the Paper Take-Up Unit ................................................ D-15
(7) Removal of the IR Board Assy ........................................................ D-16
(8) Removal of the Print Head Upper and Lower Assy ......................... D-17
(9) Removal of the PH Control Board (Digital/Analog) Assy ................. D-18
2-4. PAPER TAKE-UP SECTION ................................................................... D-19
(1) Cleaning and Replacement of the Paper Take-Up Roll,
Feed Roll, Separator Roll, and Paper Dust Remover ...................... D-19
(2) Removal of the Synchronizing/Static Charge Roller Assy ............... D-21
(3) Disassembly of the Synchronizing Roller Assy ............................... D-22
(4) Removal of the Drawer Lift-Up Motor Assy ..................................... D-24
(5) Disassembly of the Multi Bypass Unit ............................................. D-24
2-5. FUSING UNIT .......................................................................................... D-28
(1) Replacement of the Bushings (Upper and Lower) and
the Upper and Lower Fusing Rollers ............................................... D-28
(2) Replacement of the Oil Application Roller, Oil Supply Roller, and
Oil Regulating Blade ........................................................................ D-32
(3) Adding the Fusing Oil ......................................................................D-36
(4) Replacement of the Cleaning Roller ................................................ D-37
(5) Replacement of the Oil Collecting Blade and Oil Filter .................... D-38
(6) Cleaning of the Fusing Entrance Guide, Upper and
Lower Fusing Roller Thermistors, and Upper and
Lower Fusing Roller Thermostats .................................................... D-40
(7) Disassembly of the Oil Pump Assy .................................................. D-41
2-6. DEVELOPING UNIT ................................................................................ D-44
(1) Replacement of the ATDC Sensor .................................................. D-44
CONTENTS
vii