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AR-651/810 FUSER UNIT 14 - 6
14. 4. 3. IH control circuit interface
The IH control circuit uses a photocoupler as an insulator against the secondary circuit.
The interface signals are as followed.
Number Signal Direction Definition
J552-1 IH2ON HOST to IH OFF signal when the roller ends are heated abnormally
J552-2 5V
J552-3 H1PWR1 HOST to IH Electric power setting
J552-4 H1PWR2
J552-5 H1PWR3
J552-6 H2PWR1
J552-7 H2PWR2
J552-8 H2PWR3
J553-1 IH1ON HOST to IH ON/OFF signal
J553-2 SG
J553-3 IHDUTY HOST to IH ON duty signal
J553-4 IHERR1 HOST to IH Error signal
J553-5 IHERR2
- SERVICE MANUAL 1
- CONTENTS 4
- 1. SPECIFICATIONS 6
- 1.1.2. Basic specifications 7
- C. Original 8
- D. Paper 8
- E. Paper feed 9
- F. Continuous copy 9
- G. Density adjustment 9
- H. Picture quality mode 9
- I. Magnification ratio 9
- J. Counter display 10
- K. Charger wire cleaning 11
- L. Special functions 11
- M. Edit functions 13
- N. Tab paper 13
- O. Digital edit function 13
- P. Operation panel 14
- Q. Environmental conditions 14
- R. Noises 15
- S. Complying standards 15
- T. Power source 15
- U. External view 15
- V. Packing 15
- W. Maintenance 16
- X. Automatic document feeder 16
- Y. Automatic duplex unit 16
- Z. Tandem LCF 17
- A. Image quality 17
- 1.2. Accessories 18
- 1.3. Options 18
- 1.4. Supplies 19
- 1.5. System List 20
- 2. 1. Sectional View 21
- 2. 2. Electric Parts Layout 25
- (B-3) PC board 27
- (B-4) Other parts 27
- Rear side 27
- [C] Laser unit 28
- [D] Transfer/Transport unit 28
- [E] Fuser unit 29
- [F] Copier unit 30
- (F-1) Motor/Fan 30
- (F-2) Clutch/Solenoid 31
- (F-3) Sensor/Switch 32
- (F-4) PC board 33
- (F-5) Other parts 34
- (1) Motors 36
- (2) Sensors and switches 38
- (4) PC boards 41
- (7) Transformer 42
- (5) Heaters and lamps 42
- (6) Solenoid 42
- (8) Others 43
- 2. 5. System Block Layout 46
- 2. 6. 1. Covers 47
- Left top cover 48
- Right top cover 48
- 2. 6. 2. PC boards 49
- 3. COPY PROCESS 51
- Surface potential (V) 52
- Type of originals 56
- Aluminum conductive base 57
- OPC layer 57
- 4. 2. 1. Warming-up 62
- Forward rotation 65
- Reverse rotation 65
- 4. 2. 4. Bypass copying 66
- 4. 2. 5. Interrupt copying 66
- 4. 3. Abnormality Detection 67
- 0.975sec 70
- 4. 4. 1. Power ON to ready 72
- Paper jam 75
- Drum reversed 75
- 5. CONTROL PANEL 76
- Fig. 5.2-1 79
- Fig. 5.2-2 79
- LCD PANEL 83
- 320 x 240 DOTS 83
- 5. 4. 2. LED display circuit 85
- MKEY board 87
- SKEY board 87
- LCD panel 87
- 6. SCANNING SECTION 88
- 6. 2. Construction 89
- 6. 3. 1. Scanner motor 91
- 6. 4. 1. General description 94
- 6. 4. 2. Exposure lamp 95
- Xenon lamp 96
- Xenon lamp 96
- 7497 7498 7499 7500 97
- Reflection type 98
- [A4 Series] 99
- [LT Series] 99
- Original 101
- Phototransistor 101
- Semi 102
- conductive 102
- 7. 2. 1. General description 103
- 7. 2. 2. Configuration 104
- 7. 3. 1. Features 105
- 0123456789 0123456789 106
- 7. 4. 1. Features 108
- 7. 5. Scanning Section 109
- 7. 6. Writing Section 109
- 8. LASER & OPTICAL UNIT 110
- >PS< 112
- 8. 3. Laser Diode 116
- Laser fan motor 117
- Connector 117
- 9. PAPER FEEDING SECTION 119
- 9. 3. Operation 122
- 9. 3. 3. Paper separation 123
- 9. 3. 4. General operation 124
- 1 2 3 4 5 6 7 128
- IN1 IN2 M(+) GND M(–) N.C. V 128
- Feed roller 130
- Separation roller 130
- Standby side empty sensor 142
- 10. PROCESS SECTION 144
- 10. 2. Functions 145
- 10. 4. 2. Operation 147
- J347-2 HVTVR 148
- J347-8 HVDVR 148
- J347-5 HVMVR 148
- 10. 5. 2. Construction 149
- 10. 5. 3. Control method 149
- Temperature/humidity sensor 154
- Surface potential sensor 154
- Duct out fan 155
- Exit fan 155
- 11. DRUM/CLEANER UNIT 156
- 11. 2. Functions 157
- Light emitting element 158
- Light sensing element 158
- 11. 4. 3. Outline of control 159
- 11. 4. 4. Construction 160
- Cleaner top cover 162
- Foot of screw 162
- E-ring Cam 164
- Separation finger 164
- Drum wheel 165
- Drum motor 165
- 12. DEVELOPER UNIT 166
- 12. 2. Functions 167
- 12. 3. Developer Unit Drive 169
- Developer unit drive 170
- 12. 4. Motor Drive Circuit 171
- 12. 4. 2. Developer motor 172
- 13. TRANSFER/TRANSPORT UNIT 187
- 13. 3. Functions 188
- Cam Lever 190
- 14. FUSER UNIT 197
- 14. 3. Functions 198
- 14. 4. 1. Configuration 200
- Photocoupler 201
- Thermistor 206
- Main CPU 206
- M/DC-HTR-340N 207
- 14. 5. 2. Control signals 208
- Upper separation finger 213
- Lower separation finger 213
- Entrance lower guide unit 214
- Cleaning roller (felt) 214
- Exit roller 214
- 2.0~2.5mm 215
- 15. EXIT/REVERSING UNIT 218
- E-ring Bearing 225
- 16. RADF (DOCUMENT FEEDER) 226
- 16. 2. Construction 227
- 16. 3. Drive System 228
- 16. 4. Signal Block Diagram 231
- 16. 5. Operations 232
- 16. 6. Jams 257
- 16. 7. Errors 262
- A4 series 264
- LT series 265
- 16. 9. Flow Chart 266
- (2) Rewriting of flash ROM 267
- (4) Initialization 269
- (5) Control for separation 270
- 16. 10. Timing Chart 282
- 16. 11. Circuits 287
- 16. 12. Input/Output Signals 293
- ADF front cover 298
- ADF rear cover 298
- Tray lift motor 302
- Read motor 302
- Tension spring 302
- Original length sensor 306
- Cover open/close switch 306
- Back cover 306
- Tray sensor 306
- RADF open/close switch 308
- Blue Orange Brown 308
- Scanning guide 308
- Large original exit guide 308
- Intermediate transport sensor 308
- Large original exit sensor 309
- Read sensor 309
- Upper transport guide 309
- Registration sensor 309
- Original width sensor 309
- Platen guide 310
- 17. POWER SUPPLY UNIT 317
- 17. 3. Output Channel 318
- 17. 4. Fuse 321
- 17. 6. Power Supply Sequence 324
- 18. PRINTED WIRING BOARDS 325
- (2) PWA-F-LGC-340 326
- (3) PWA-F-SLG-340 327
- (4) PWA-F-PLG-340 328
- (5) PWA-F-CCD2-340 329
- (6) PWA-F-LDR-340 330
- (7) PWA-F-SNS-340 330
- (8) PWA-F-MOT-340 330
- (9) PWA-F-MOT2-340 331
- (Japan only) 332
- Trademark Acknowledgments 342
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