Minolta Di251 Service Manual page 180

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. PARTS WHICH MUST NOT BE TOUCHED ........................................... D-2
(1) Red painted Screws ........................................................................ D-2
(2) Variable Resistors on Board ............................................................ D-2
(3) Other Screws ................................................................................... D-2
2. DISASSEMBLY/REASSEMBLY ...................................................................... D-3
2-1. DOORS, COVERS, AND EXTERIOR PARTS:
IDENTIFICATION AND REMOVAL PROCEDURES .............................. D-3
2-2. REMOVAL OF CIRCUIT BOARDS AND OTHER ELECTRICAL
COMPOMENTS ....................................................................................... D-6
2-3. MAINTENANCE SCHEDULE .................................................................. D-8
2-4. PAPER TAKE-UP/TRANSPORT SECTION ............................................ D-10
(1) Removal of the Paper Take-Up Roll ................................................ D-10
(2) Removal of the Paper Dust Remover Assy ..................................... D-10
(3) Cleaning of the Paper Dust Remover Assy ..................................... D-11
(4) Removal of the Synchronizing Roller Gear and Synchronizing
Roller Bushing ................................................................................. D-11
(5) Cleaning of the Side Cover .............................................................. D-12
2-5. OPTICAL SECTION ................................................................................ D-13
(1) Removal of the PH Unit ................................................................... D-13
(2) Removal of the CCD Unit ................................................................ D-16
(3) Cleaning of the Scanner Rails/Bushings ......................................... D-16
(4) Cleaning of the Mirrors .................................................................... D-17
(5) Cleaning of the Lens ........................................................................ D-17
(6) Cleaning of the Original Glass ......................................................... D-17
(7) Removal of the Scanner .................................................................. D-18
(8) Removal of the Scanner Drive Cables ............................................ D-19
(9) Winding of the Scanner Drive Cables .............................................. D-20
2-6. IMAGE TRANSFER SECTION ................................................................ D-24
(1) Removal of the Image Transfer Roller Assy .................................... D-24
(2) Cleaning of the Comb Electrode ...................................................... D-24
(3) Cleaning of the Pre-Image Transfer Guide Plate ............................ D-25
(4) Removal of the Ozone Filter ............................................................ D-25
2-7. DEVELOPING SECTION ........................................................................ D-26
(1) Removal of the Imaging Cartridge ................................................... D-26
2-8. FUSING SECTION .................................................................................. D-27
(1) Removal of the Fusing Unit ............................................................. D-27
(2) Removal of the Fusing Roller Heater Lamp, Right Fusing
Roller, and Left Fusing Roller .......................................................... D-28
(3) Remove the Fusing Roller Thermistor, Fusing Roller Hearter
Lamp Fuse, and Fusing Roller Thermostat ..................................... D-31
3. ADJUSTMENT ................................................................................................. D-32
3-1. ADJUSTMENT JIGS AND TOOLS USED ............................................... D-32
3-2. ADJUSTMENT REQUIREMENT LIST .................................................... D-32
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