Minolta Di450 Service Manual page 278

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
COMPONENTS ....................................................................................... D-5
2-3. MAINTENANCE SCHEDULE .................................................................. D-9
(1) 45-cpm copier .................................................................................. D-9
(2) 55-cpm copier .................................................................................. D-12
2-4. Removal of the Unit ................................................................................. D-15
(1) Removal of the Multi Bypass Unit .................................................... D-15
(2) Removal of the Suction Unit ............................................................ D-15
(3) Removal of the Main Hopper Unit ................................................... D-16
(4) Removal of the IR Unit .................................................................... D-17
(5) Removal of the PH Unit ................................................................... D-20
(6) Removal of the Developing Unit ...................................................... D-22
(7) Removal of the Sub Hopper Unit ..................................................... D-22
(8) Removal of the Fusing Unit ............................................................. D-22
(9) Removal of the Upper Left Door (Exit/Duplex Switching Unit) ......... D-23
2-5. PAPER TAKE-UP/TRANSPORT SECTION ............................................ D-24
(1) Removal of the Paper Take-Up Roll, Paper Feed Roll and Paper
Separator Roll Assy. ........................................................................ D-24
(2) Cleaning of the Paper Take-Up Roll and Paper Feed Roll .............. D-25
(3) Cleaning of the Paper Separator Roll .............................................. D-25
(4) Removal of the Drawer Lift-Up Motor .............................................. D-26
(5) Removal of the Upper and Lower Transport Rollers ....................... D-27
(6) Cleaning of the Upper Transport Roller ........................................... D-29
(7) Cleaning of the Lower Transport Roller ........................................... D-29
(8) Cleaning of the Vertical Transport Rollers ....................................... D-30
(9) Removal of the Synchronizing Roller .............................................. D-30
(10) Cleaning of the Upper Synchronizing Roller .................................... D-32
(11) Removal of the Lower Synchronizing Roller .................................... D-32
(12) Cleaning of the Lower Synchronizing Roller .................................... D-33
(13) Removal of the Synchronizing Paper Dust Remover ...................... D-33
(14) Removal of the Transport Paper Dust Remover ............................. D-33
(15) Cleaning of the Paper Dust Remover .............................................. D-34
(16) Disassembly of the Suction Unit ...................................................... D-34
(17) Disassembly of the Multi Bypass Unit ............................................. D-35
(18) Cleaning of the Multi Bypass Paper Take-Up Roll/Paper Feed
Roll ............................................................................................. D-37
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