Sharp AR-650 Service Manual Page 218
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12 - 3 DEVELOPER UNIT
(4) Lower and upper developer sleeves (magnetic rollers)/transport roller (magnetic roller)
These parts are made of aluminum, with magnets positioned inside them. By using the magnetic
force, the developer material is attracted (because the carrier is made of iron powder), forming mag-
netic lines of force shaped like a brush. Further, the magnets are secured, and only the sleeves
around them rotate. Through this rotation, the magnetic brush of the lower and upper developer
sleeves sweeps the surface of the photosensitive drum, enabling development.
(5) Leveler
This regulates the amount of developer material transferred by the transport roller so that the mag-
netic brush correctly comes into contact with the surface of the photosensitive drum.
(6) Separation auxiliary member
This member supports the task of separating the developer material on the lower developer sleeve.
(7) Auto-toner sensor
For making good copies, it is necessary to keep the carrier and toner in the developer unit at a fixed
ratio. The auto-toner sensor monitor the toner density in the developer material by operating a mag-
netic bridge circuit. When the toner density drops, a fixed amount of toner is added from the toner
hopper.
- SERVICE MANUAL 1
- DIGITAL COPIER 1
- AND SERVICE FOR THE COPIER 2
- CONTENTS I 4
- II CONTENTS 5
- CONTENTS III 6
- CONTENTS IV 7
- CONTENTS V 8
- CONTENTS VI 9
- 1.1 Specifications 10
- SPECIFICATIONS 1 - 2 11
- 1 - 3 SPECIFICATIONS 12
- SPECIFICATIONS 1 - 4 13
- 1 - 5 SPECIFICATIONS 14
- SPECIFICATIONS 1 - 6 15
- 1 - 7 SPECIFICATIONS 16
- SPECIFICATIONS 1 - 8 17
- 1 - 9 SPECIFICATIONS 18
- SPECIFICATIONS 1 - 10 19
- 1 - 11 SPECIFICATIONS 20
- USA/CANADA 21
- OTHER COUNTRY 21
- 1.5 System List 22
- 2. OUTLINE OF THE MACHINE 23
- OUTLINE 2 - 2 24
- 2 - 3 OUTLINE 25
- [B] Front Drive System 26
- [C] Rear Drive System 27
- OUTLINE 2 - 6 28
- 2 - 7 OUTLINE 29
- Scanner unit 30
- Laser unit 30
- System unit 30
- [LT series] 32
- (B-3) Motors 33
- (B-4) AC electrical parts 33
- [C] Laser Unit 34
- (C-1) PC boards 34
- (C-3) Motors 35
- [D] System Unit 35
- (D-1) PC boards 35
- No. Name Symbol 38
- Upper unit 39
- OUTLINE 2 - 18 40
- (F-3) Motors 41
- (F-4) AC electrical parts 42
- Lower unit 43
- (G-3) Motors 45
- (G-4) AC electrical parts 46
- (1) Motors 47
- (2) Solenoids 48
- (4) Counters 48
- (5) Switches 48
- 2 - 27 OUTLINE 49
- (6) Heaters and lamps 50
- (7) PC boards 50
- (8) Transformers 51
- (9) Other 51
- 2.3 System Block Diagram 52
- Lower front cover 53
- Power switch cover 54
- 2 - 33 OUTLINE 55
- Rear top cover 56
- Original glass 56
- Lock supports 58
- High - voltage transformer 58
- Ground wire fixing screw 58
- Power inner cover 59
- 3. COPYING PROCESS 62
- COPYING PROCESS 3 - 2 63
- 3 - 3 COPYING PROCESS 64
- COPYING PROCESS 3 - 4 65
- 3 - 5 COPYING PROCESS 66
- Aluminum 67
- Photosensitive layer 67
- Discharge LED array 69
- 3 - 9 COPYING PROCESS 70
- COPYING PROCESS 3 - 10 71
- 4. COPIER OPERATION 72
- COPIER OPERATION 4 - 2 73
- 4 - 3 COPIER OPERATION 74
- COPIER OPERATION 4 - 4 75
- 4 - 5 COPIER OPERATION 76
- COPIER OPERATION 4 - 6 77
- 1.144sec 78
- Exit switch 79
- CLEAR PAPER (E02) 79
- 4 - 9 COPIER OPERATION 80
- 4.4.1 Power ON to ready 81
- 4 - 11 COPIER OPERATION 82
- 4.4.2 Automatic feed copying 83
- 4 - 13 COPIER OPERATION 84
- 5 - 1 DISPLAY UNIT 85
- DISPLAY UNIT 5 - 2 86
- 5 - 3 DISPLAY UNIT 87
- DISPLAY UNIT 5 - 4 88
- 5 - 5 DISPLAY UNIT 89
- 5.4 Description of Operation 91
- DISPLAY UNIT 5 - 8 92
- 5 - 9 DISPLAY UNIT 93
- KEY boardLCDLCD board 94
- Semicon 95
- 6.2 Image Processing Circuit 96
- 6 - 3 IMAGE PROCESSING 97
- Histogram 98
- 6 - 5 IMAGE PROCESSING 99
- IMAGE PROCESSING 6 - 6 100
- 6 - 7 IMAGE PROCESSING 101
- 6.4 PLG Board (PWA-F-PLG-300) 102
- 6.5 Scanner 103
- 6.6 Printer 103
- 7.1 Functions 104
- Reflector Original Glass 105
- Reflector 105
- Exposure lamp 105
- Mirror 1 105
- Carriage 2 106
- Copiable length 107
- Original indicator unit 107
- Carriage 1 107
- Copiable width 107
- Optical System (rear side) 108
- SCANNER 7 - 6 109
- 7 - 7 SCANNER 110
- Fig. 7.4-4. PWA-SDV 111
- 7.5 Exposure Control Circuit 112
- SCANNER 7 - 10 113
- 1 to generated 114
- SCANNER 7 - 12 115
- 7.6 Outline of Control 116
- Fig. 7.7-1 117
- [A4 Series] [LT Series] 117
- [A4 Series] 118
- [LT Series] 118
- SCANNER 7 - 16 119
- Original 120
- Phototransistor 120
- [A4 series] 121
- APS cover 122
- Scanning motor 123
- Connector 123
- Optical fan 124
- Front top frame 125
- Rear top frame 125
- Mirror 2 126
- Mirror 3 126
- Installation standard 127
- Setting holes 127
- 7 - 25 SCANNER 128
- 8. PRINTING 129
- Feed side 130
- Exit side 130
- Front side 130
- Rear side 130
- PLG PCboard 130
- 8.2 Structure 131
- (3) Half mirror 132
- 8 - 5 PRINTING 133
- PRINTING 8 - 6 134
- 8 - 7 PRINTING 135
- 8.3 Laser Diode 136
- 8 - 11 PRINTING 139
- 9. PAPER FEED SYSTEM 140
- PAPER FEED SYSTEM 9 - 2 141
- Construction of motor drive 142
- PAPER FEED SYSTEM 9 - 4 143
- 9.2 Aligning Section 144
- Aligning roller (L) 145
- Paper guide 145
- Set screw 146
- Aligning motor 146
- Belt transport unit 147
- 9 - 9 PAPER FEED SYSTEM 148
- PAPER FEED SYSTEM 9 - 10 149
- 9 - 11 PAPER FEED SYSTEM 150
- (1) Tray section 151
- (2) Paper feeding section 152
- PAPER FEED SYSTEM 9 - 14 153
- Pick-up bracket 154
- Manual pick-up roller 154
- LCF pick-up roller 155
- 9 - 17 PAPER FEED SYSTEM 156
- Paper-feed roller 157
- Separation roller 157
- 9 - 19 PAPER FEED SYSTEM 158
- PFP paper feed guide unit 159
- Drive bracket 159
- — Outer side Upper side 160
- Tray motor 161
- Tray motor unit 161
- Bottom switch unit 162
- Guide lever 162
- PAPER FEED SYSTEM 9 - 24 163
- LCF feed roller 164
- LCF separation roller 164
- 9.4 Paper Feed Pedestal (PFP) 168
- 9.4.2 Component names 169
- 9 - 31 PAPER FEED SYSTEM 170
- PAPER FEED SYSTEM 9 - 32 171
- Internal signals 172
- 9 - 35 PAPER FEED SYSTEM 174
- PAPER FEED SYSTEM 9 - 36 175
- Have two seconds 179
- CW came ON? 179
- 9 - 41 PAPER FEED SYSTEM 180
- PAPER FEED SYSTEM 9 - 42 181
- 9 - 43 PAPER FEED SYSTEM 182
- PAPER FEED SYSTEM 9 - 44 183
- 9 - 45 PAPER FEED SYSTEM 184
- Cassette switch 185
- Cassette 185
- Actuator 185
- (the actuator is detected) 186
- PAPER FEED SYSTEM 9 - 48 187
- PFP pick-up rolle 189
- Gear E-ring 190
- Stay guide 191
- Switch cover 192
- PFP tray-up switch 192
- PFP paper empty switch 192
- PFP upper aligning roller 193
- (metal roller) 193
- (rubber roller) 193
- Motor fixing screws 194
- Gear units 194
- (Outside) (Inside) 195
- 10. DRUM-RELATED SECTION 196
- 10.2 Functions 197
- Thermistor bracket 198
- Drum thermistor 198
- Front flange 199
- Charge wire 200
- V-groove 200
- Wire cleaner 201
- Main charger cleaning motor 202
- Ozone filter 203
- (2 screws) 205
- 11. TRANSFER/TRANSPORT UNIT 206
- 11.2 Description of Operation 207
- 11.3 Functions 208
- [Right side] 210
- [Left side] 210
- Front frame side cam 211
- Front side lever 211
- (Silver PCboard) 214
- (Green PCboard) 214
- Locking support 215
- 12. DEVELOPER UNIT 216
- 12.2 Construction 217
- 12 - 3 DEVELOPER UNIT 218
- Sensor lever 219
- Developer Unit Drive 221
- 12.4 Motors 222
- DEVELOPER UNIT 12 - 8 223
- Signal “H” level “L” level 224
- DEVON Motor OFF Motor ON 224
- Toner motor 225
- Gate array 225
- 12 - 11 DEVELOPER UNIT 226
- DEVELOPER UNIT 12 - 12 227
- ATS: large 228
- ATS: small 228
- Developer unit 229
- Top cover 229
- Urethan seal 230
- Guide roller 231
- Magnetic roller holder 232
- Magnetic roller 232
- Pole fixing holder 232
- Magnet roller holder 233
- Transport roller 234
- Pole fixing bush 234
- Convex part of sideframe 234
- Nozzle mixer 235
- Oil seal 235
- Mixer shaft 236
- Toner hopper unit 238
- Motor bracket 239
- Motor unit 240
- Developer bias 240
- DEVELOPER UNIT 12 - 26 241
- DEVELOPER UNIT 12 - 28 243
- 13. CLEANER UNIT 244
- 13.2 Description of Functions 245
- 13 - 3 CLEANER UNIT 246
- CLEANER UNIT 13 - 4 247
- Toner adhesion amount sensor 248
- Photosensitive drum 248
- Test pattern (toner image) 248
- Light source intensity signal 248
- CLEANER UNIT 13 - 6 249
- 13 - 7 CLEANER UNIT 250
- Recovery blade 252
- Fur brush 252
- Separation claw unit 253
- Solenoid 255
- Bunding band 255
- Toner bag 256
- Toner bag cover 256
- Toner-full detector 256
- CLEANER UNIT 13 - 14 257
- Fig. 14.1-1 258
- 14.3 Functions 259
- 14 - 3 FUSER UNIT 260
- 14.4 Heater Control Circuit 261
- Reference 262
- Fig. 14.5-1 264
- HTRMOT Motor OFF Motor ON 265
- 1mm~1.5mm 267
- Harness cover 268
- Lower thermistor 268
- Jam release unit 268
- Separation claw 269
- Lower separation claw unit 269
- 14 - 13 FUSER UNIT 270
- Stop ring 271
- Timing belt 271
- Upper heat 272
- Pressure lever 273
- Lower heat roller 273
- Stamped mark 273
- Lower inlet guide 273
- Connector cable bracket 274
- Heater fan 276
- 15.1 Introduction 277
- ADU 15 - 2 278
- 15.2 Drive 279
- Paper side guide 280
- Paper trailing edge guide 280
- Width guide motor 280
- Length guide motor 280
- Holding gate 281
- Spring clutch 281
- Flapper solenoid 281
- Aligning roller 281
- Aligning clutch 281
- 15.3 Description of Operation 282
- 15 - 7 ADU 283
- ADU 15 - 8 284
- 15 - 9 ADU 285
- ADU 15 - 10 286
- Length guide switch 287
- Width guide switch 287
- Position detection switch1 287
- ADU 15 - 12 288
- 15 - 13 ADU 289
- ADU 15 - 14 290
- 15 - 15 ADU 291
- Feed switch 292
- Aligning switch 292
- Color (black-black) 293
- (white-white) 293
- (white-black) 293
- ADU 15 - 18 294
- Transport guide-u 295
- ADU 15 - 20 296
- Discharge brush 297
- Exit roller 299
- Transport / reverse 300
- 16.1 Outline 301
- 16.2.1 ADF construction 302
- 16 - 3 ADF 303
- 16 - 5 ADF 305
- ADF 16 - 6 306
- 16 - 7 ADF 307
- ADF 16 - 8 308
- 16 - 9 ADF 309
- ADF 16 - 10 310
- 16 - 11 ADF 311
- ADF 16 - 12 312
- 16 - 13 ADF 313
- ADF 16 - 14 314
- 16 - 15 ADF 315
- ADF 16 - 16 316
- 16 - 17 ADF 317
- ADF 16 - 18 318
- 16 - 19 ADF 319
- ADF 16 - 20 320
- 16.5 Detection of Paper Jam 321
- ADF 16 - 22 322
- 16 - 23 ADF 323
- 16.7 Flow Charts 324
- 16.7.2 Operation control 325
- ADF 16 - 26 326
- 16.7.4 One-sided feed control 327
- ADF 16 - 28 328
- 16 - 29 ADF 329
- ADF 16 - 30 330
- 16.7.8 Exit control 331
- Initial alignment 332
- 16 - 33 ADF 333
- 16.8 Timing Charts 334
- 16 - 35 ADF 335
- ADF 16 - 36 336
- 16 - 37 ADF 337
- 16.9.1 Symbols 338
- 16.9.3 Signal block diagram 339
- 16.10 Description of Circuits 340
- 16 - 41 ADF 341
- Feed motor 342
- 16 - 43 ADF 343
- ADF 16 - 44 344
- 16 - 45 ADF 345
- 16.11.3 Sensor input circuits 346
- 16 - 47 ADF 347
- ADF 16 - 48 348
- Transportt unit 349
- Belt tension plate 350
- Transport belt 350
- ADF unit 351
- Jam release cover 352
- Feed unit 353
- Separation unit 354
- Leaf spring 354
- Inlet guide 354
- Timing sensor 355
- Size sensor 355
- Reverse unit 356
- Exit cover 357
- Reverse roller 358
- Exit sensor 358
- Fixing reference: clearance 360
- 0 to -0.5mm 360
- (end face reference) 360
- Fixing reference: Clearance 361
- (rib end face reference) 361
- 3. Feed sheets 1, 2, 4, 5 362
- (mirror mylar sheet) 363
- 0 to 0.5mm 363
- Weight holder 364
- Weight mylar sheet 364
- (overlapping not allowed) 365
- Fixing reference: 0.5mm 366
- Fixing reference: 0 to -0.5mm 367
- Fixing reference: 368
- (when pushed 368
- Clearance 0 to 0.5mm 368
- (Overlapping not allowed) 368
- 12. Cushions 369
- ADF 16 - 70 370
- 14. Discharge brush 371
- A-A cross-section 371
- Deviation ±0.5mm 372
- (slide tool line) 372
- 16. Tray sheet guides 373
- 16.13 PC Board 374
- (2) PWA-F-SEN-794 375
- ADF 16 - 76 376
- 19. Shield mylar (DF cover) 377
- 20. Pad cushion 377
- 17. POWER SUPPLY UNIT 379
- POWER SUPPLY 17 - 2 380
- 18. PC BOARD 382
- (2) PWA-F-MTB-300 383
- (3) PWA-F-LGC-300 384
- (5) PWA-F-MOT-300 385
- (4) PWA-F-ADU-300 385
- (6) PWA-F-SLG-300 386
- (7) PWA-F-SDV-300 386
- (8) PWA-F-PLG-300 387
- UNPACKING AND INSTALLATION 388
- "Down / 'Up 394
- SHARP CORPORATION 396
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