Oki OKIFAX4550 Maintenance Manual page 6

8. DIPSWITCHS SETTING TABLES FOR EN9/INU NCU BOARDS ...................... 261
APPENDIX A PC BOARD DESCRIPTIONS AND OPERATION ........................... 271
1. Unit Configuration and Block Diagram ..................................................................................... 271
1.1 The unit configuration is as follows: ............................................................................... 274
1.2 Function of Each Unit .................................................................................................... 275
2. Explanation of Signal Flow ...................................................................................................... 278
2.1 OKIFAX4550 ................................................................................................................. 278
2.2 OKIOFFICE87 ............................................................................................................... 294
3. 46F Circuit Diagram (OKIFAX4550) ........................................................................................ 310
3.1 46F Circuit Diagram (1/13) ............................................................................................ 310
3.2 46F Circuit Diagram (2/13) ............................................................................................ 311
3.3 46F Circuit Diagram (3/13) ............................................................................................ 312
3.4 46F Circuit Diagram (4/13) ............................................................................................ 313
3.5 46F Circuit Diagram (5/13) ............................................................................................ 315
3.6 46F Circuit Diagram (6/13) ............................................................................................ 316
3.7 46F Circuit Diagram (7/13) ............................................................................................ 318
3.8 46F Circuit Diagram (8/13) ............................................................................................ 321
3.9 46F Circuit Diagram (9/13) ............................................................................................ 322
3.10 46F Circuit Diagram (10/13) .......................................................................................... 324
3.11 46F Circuit Diagram (11/13) .......................................................................................... 325
3.12 46F Circuit Diagram (12/13) .......................................................................................... 329
3.13 46F Circuit Diagram (13/13) .......................................................................................... 330
4. R46 Circuit Diagram (OKIOFFICE87) ...................................................................................... 331
4.1 R46 Circuit Diagram (1/15, 2/15, 3/15) .......................................................................... 331
4.2 R46 Circuit Diagram (4/15) ............................................................................................ 332
4.3 R46 Circuit Diagram (5/15) ............................................................................................ 333
4.4 R46 Circuit Diagram (6/15) ............................................................................................ 334
4.5 R46 Circuit Diagram (7/15) ............................................................................................ 335
4.6 R46 Circuit Diagram (8/15, 9/15) ................................................................................... 337
4.7 R46 Circuit Diagram (10/15) .......................................................................................... 340
4.8 R46 Circuit Diagram (11/15) .......................................................................................... 341
4.9 R46 Circuit Diagram (12/15) .......................................................................................... 343
4.10 R46 Circuit Diagram (13/15) .......................................................................................... 344
4.11 R46 Circuit Diagram (14/15) .......................................................................................... 348
4.12 R46 Circuit Diagram (15/15) .......................................................................................... 349
5. OPE (04W) Circuit Diagram ..................................................................................................... 350
6. Power Supply Unit ................................................................................................................... 351
6.1 MPW1446 (230V)/MPW1546 (120V) Circuit Diagram ................................................... 351
7. P2H Circuit Diagram ................................................................................................................ 353
7.1 High-voltage section ......................................................................................................... 354
7.2 Photosensors ................................................................................................................. 355
7.3 Cover open circuit .......................................................................................................... 355
8. EN9 and INU Circuit Diagram .................................................................................................. 356
8.1 EN9 circuit diagram ....................................................................................................... 358
8.2 INU circuit diagram ........................................................................................................ 361
8.3 Outline of Parallel Pick Up ............................................................................................. 364
9. G4N-PCB ................................................................................................................................. 365
APPENDIX B DESCRIPTIONS OF PRINT OPERATION ...................................... 367
1. Electro-Photographic Processor .............................................................................................. 367
2. Electro-Photographic Process ................................................................................................. 369
2.1 Explanation of Each Process Operation ........................................................................ 372
3. Paper Jam Detection ............................................................................................................... 378
4. Toner Low Detection ................................................................................................................ 380
5. Cover Open .............................................................................................................................. 381
APPENDIX C CIRCUIT DIAGRAMS ...................................................................... 382
APPENDIX D MECHANICAL EXPANDED VIEW DRAWING AND PARTS LIST . 427
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