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Brother International HL 1230 Service Manual - Page 51

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CHAPTER 3 THEORY OF OPERATION CHAPTER 3 THEORY OF OPERATION 1. ELECTRONICS 1.1 General Block Diagram HL-1230/1440 Fig. 3-1 shows a general block diagram of the HL-1230/1440 printer. Control system RAM 2MB Optional RAM (SIMM) (max. 32Mbytes) (HL-1440 only) Expansion memory I/O (HL-1440 only) Video control block Interface block (HL-1230: Parallel) (HL1440: Parallel/USB) External device Low-voltage power supply block High-voltage power supply block Engine control block Operation block (Control panel) Laser unit Drive block (DC motor) Drum unit Transfer block Charging block Drum Paper dust cleaner block DevFeiglo.p3in- g1 block Toner cartridge Image generation system Paper tray unit Paper cassette Manual feed Fixing unit Paper eject block Paper feed system Fig. 3-1 3-1

Section	Page
sm_hl14er.pdf	1
PREFACE	3
TABLE OF CONTENTS	4
REGULATION	10
SAFETY INFORMATION	12
CHAPTER 1 GENERAL	14
1. FEATURES	14
2. OVERVIEW	17
3. SPECIFICATIONS	18
CHAPTER 2 INSTALLATION AND BASIC OPERATION	28
1. CONDITIONS REQUIRED FOR INSTALLATION	28
2. UNPACKING	29
3. INSTALL THE PRINTER	30
4. PAPER HANDLING	37
5. CONTROL PANEL OPERATION	45
6. NETWORK BOARD OPERATION	49
CHAPTER 3 THEORY OF OPERATION	51
1. ELECTRONICS	51
2. MECHANICS	72
CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY	81
1. SAFETY PRECAUTIONS	81
2. DISASSEMBLY FLOW	82
3. DISASSEMBLY PROCEDURE	83
4. PACKING	132
CHAPTER 5 PERIODIC MAINTENANCE	133
1. CONSUMABLE PARTS	133
2. PERIODICAL REPLACEMENT PARTS	136
3. PERIODICAL CLEANING	137
4. MTBF/MTTR	139
CHAPTER 6 TROUBLESHOOTING	140
1. INTRODUCTION	140
2. OPERATOR CALLS & SERVICE CALLS	143
3. ERROR MESSAGES	145
4. PAPER PROBLEMS	149
5. SOFTWARE SETTING PROBLEMS	155
6. MALFUNCTIONS	159
7. IMAGE DEFECTS	164
8. INCORRECT PRINTOUT	183
9. NETWORK PROBLEM	186
10. INSPECTION MODE	193
APPENDIX	199
APPENDIX 1. SERIAL NO. DESCRIPTIONS	199
APPENDIX 2. DIAMETER/CIRCUMFERENCE OF ROLLERS	201
APPENDIX 3. PRINT SPEEDS WITH VARIOUS SETTINGS	202
APPENDIX 4. HOW TO KNOW DRUM UNIT LIFE & PAGE COUNTER	203
APPENDIX 5. HOW TO USE THE SELF-DIAGNOSTICS TOOLS	210
APPENDIX 6. NVRAM DEFAULT VALUE	214
APPENDIX 7. PAPER CASSETTE INFORMATION	215
APPENDIX 8. CONNECTION DIAGRAM, HL-1230	216
APPENDIX 9. CONNECTION DIAGRAM, HL-1440	217
APPENDIX 10. CONNECTION DIAGRAM, HL-1450	218
APPENDIX 11. CONNECTION DIAGRAM, HL-1470N	219
APPENDIX 12. MAIN PCB CIRCUIT DIAGRAM, HL-1240/1440 (1/3)	220
APPENDIX 13. MAIN PBC CIRCUIT DIAGRAM, HL-1230/1440(2/3)	221
APPENDIX 14. MAIN PCB CIRCUIT DIAGRAM, HL-1230/1440(3/3)	222
APPENDIX 15, MAIN PCB CIRCUIT DIAGRAM	223
APPENDIX 16, NETWORK BOARD CIRCUIT DIAGRAM, HL-1470N	224
APPENDIX 17, LOW-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM(110-120V)	225
APPENDIX 18. LOW-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM (220-240V)	226
APPENDIX 19. HIGH-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM	227
pl_hl14er.pdf	228
NOTE	229
CONTENTS	230
1.FRAME/DRIVE UNIT	231
List	231
Drawing	232
Drawing	232
3.PAPER FEED	233
List	233
Drawing	234
4.FIXING UNIT	235
List	235
Drawing	236
5.PAPER CASSETTE	237
List	237
Draing	238
6.COVERS/LABELS	239
List	239
Drawing	240
7.MAIN PCB	241
List	241
Drawing	242
8.ENGINE PCB	243
List	243
Drawing	244
Drawing	244
10.HIGH-VOLTAGE POWER SUPPLY PCB	245
List	245
Drawing	246
Drawing	246
12.ACCESSORIES	247
List	247
Drawing	248
13.PACING MATERIALS	249
List	249
Drawing	250