Apple Color LaserWriter 12/600 PS ation User Manual Page 69
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- Table of contents
- TROUBLESHOOTING
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95.08.23.11.29
Color LaserWriter 12/600 PS Basics & Theory 1–58
Step 10:
Discharge
AC bias is applied by the discharge roller to eliminate charges
remaining on the transfer drum surface after the separation of the paper.
The value of the AC bias varies in line with the temperature/humidity
sensing system.
Note: For more information, see “Discharge Roller” in the
“Pickup/Feed System” section of this chapter.
Example: The discharge roller presses against the transfer drum in
frame 228 of the animation, just after the trailing edge of the paper has
passed. The assembly separates from the drum in frame 280.
AC Bias
Transfer Drum
Discharge Roller
(Rotates by Friction)
Animation
- Steve Rancourt 5/95 1
- Color LaserWriter 3
- Color LaserWriter 12/660 PS 4
- Overview 5
- Upgrade Path 8
- 96.11.13.15.58 10
- Basics and Theory 12
- Chapter Contents 13
- 95.08.23.11.28 14
- I. General Information 15
- Features 16
- Specifications 17
- Safety Information 21
- Status Panel 22
- Status Panel Lights 23
- Density Control Panel 24
- M C Y Bk 25
- Determined by Sensing System) 27
- Separation Voltage Forced ON 27
- Separation Voltage Forced OFF 27
- II. Basic Operation 29
- Paper Path Animation 30
- Functions 31
- Outline of Electrical System 32
- 95.08.23.11.29 33
- Outline of Drive System 39
- Toner Carousel 40
- Motor M3 40
- Drum Motor M4 40
- Position of 40
- Main Motor M2 40
- Basic Sequence of Operation 41
- III. Laser/Scanner System 42
- Laser System 43
- Laser Control Circuit 45
- Scanner System 49
- IV. Image Formation System 51
- Toner Cartridge 55
- Stages of Imaging 58
- Time (t) 59
- Stage 2: Developing 61
- Stage 4: Transfer 64
- Transfer Drum 69
- Discharge Roller 69
- (Rotates by Friction) 69
- Stage 6: Fusing 70
- /DEVAVE) goes 74
- /DEVPWM) 75
- /DEVPWM signal 75
- /HVSEP) to 78
- /HVSEPAC) 78
- /HV1AC0) 79
- /HV1DC1 signal is set 80
- Transfer Drum Lever 81
- Separation Cam 2 81
- Toner Cartridge Installation 84
- Carousel Rotation 86
- DEVHP signal is set to “H.” 87
- /DEVCAM) is set to 88
- /DEVBRK) to “H,” and 91
- Temperature/Humidity 96
- Sensor Board 96
- Toner Release 96
- Density Calibration System 97
- V. Pickup/Feed System 99
- Outline 100
- Paper Pickup 101
- Animation 102
- Paper feed direction 103
- 95.08.23.11.30 104
- Projection 106
- Paper Guide 106
- Actuator 106
- LEDDRV). If it 107
- Cassette Pickup Board 108
- /ATTSLON) turns “L” 112
- Fuser Assembly 121
- Thermistor 122
- Lower Fuser Roller 122
- Thermoswitches 122
- Upper Fuser Roller 122
- THI signal 124
- SFSNS) sent to the 130
- FXSTS) output from pin 131
- FXSTS signal alternates 131
- FXSTS signal 131
- OILSNS) goes “H.” 133
- 95.08.23.11.31 135
- Main Motor Drive Circuit 136
- Paper Jam Detection 137
- Pickup Delay 138
- Approx. 1.48 Approx. 1.48 140
- VI. System Interface 149
- Video Interface 151
- VII. Power Supply 153
- Remote Switch 156
- VIII. Sheet Feeder 157
- Pickup/Feed System 160
- Power Supply 161
- Troubleshooting 162
- Using This Chapter 163
- I. Preparation and Tips 164
- Troubleshooting Checklist 165
- 98.05.08.09.00 166
- Verifying Printer Operation 167
- Roller Diameters 171
- Startup Tests 173
- POST/Undetected Error 174
- Test Page 174
- POST Codes Matrix 175
- EPOST Codes Matrix (1 of 2) 176
- EPOST Codes Matrix (2 of 2) 177
- Diagnostic Utility 183
- Flowchart A 185
- Flowchart B 186
- Flowchart C 187
- Flowchart D 188
- Flowchart E 189
- Flowchart F 190
- Miscellaneous Issues 192
- Print Quality Issues 194
- Take Apart 196
- List of Procedures 197
- 95.08.23.09.16 198
- Toner Disposal Box 199
- Photoconductor Cartridge 202
- Fuser Access Cover 204
- Fuser Oil Bottle 206
- Fuser Oil Extraction 211
- Paper Pickup Block Removal 216
- (page 2 of 11) 219
- Grounding Spring 220
- Door-Closing Spring 220
- (page 4 of 11) 221
- Positioning Pins 222
- Pickup Block Cover 222
- Door Lever 222
- Width Guide 223
- Multipurpose Tray 223
- Pickup Trim Cover 224
- (page 8 of 11) 225
- (page 9 of 11) 226
- (page 10 of 11) 227
- 95.08.23.09.17 228
- Cassette Pickup Assembly 229
- (page 2 of 2) 231
- (page 2 of 4) 233
- (page 3 of 4) 234
- J303 J302 235
- I/O Controller Board 237
- Air Filter (page 1 of 2) 238
- Air Filter (page 2 of 2) 239
- Ozone Filter (page 1 of 2) 240
- Ozone Filter (page 2 of 2) 241
- Front Door 242
- Front Door Latch Adjustment 243
- Top Cover (page 1 of 5) 244
- Top Cover (page 2 of 5) 245
- Top Cover (page 3 of 5) 246
- Top Cover (page 4 of 5) 247
- Top Cover (page 5 of 5) 248
- About Inner Panels 249
- Inner Panel 1 250
- Inner Panel 2 251
- Transfer Drum Panel 252
- Toner Carousel Guide Panel 253
- Left Cover 254
- Rear Cover 255
- Rear Shield Plate 256
- Separation Discharge Assembly 257
- Status Panel Bottom Cover 258
- Main Motor 260
- About Fans 261
- Fuser Fan (FM1) (page 1 of 2) 262
- Fuser Fan (FM1) (page 2 of 2) 263
- Main Fan (FM2) (page 1 of 3) 264
- Main Fan (FM2) (page 2 of 3) 265
- Main Fan (FM2) (page 3 of 3) 266
- (page 1 of 2) 267
- Right Slot 270
- Left Slot 270
- I/O Interconnect Board 272
- (page 2 of 5) 274
- Cable Guide 276
- Laser/Scanner Assembly 278
- Mechanical Controller Board 279
- 12Cable Guide 281
- Cable to J1004 281
- Power Supply (page 1 of 2) 283
- Power Supply (page 2 of 2) 284
- High-Voltage Power Supply 285
- About Solenoids 286
- Cleaning Belt Drive Solenoid 287
- 95.08.23.09.18 288
- Solenoid Assembly 289
- Delivery Drive Assembly 290
- Cleaning Drive Assembly 292
- Discharge Roller 294
- Drive Assembly 294
- Transfer Drum Drive Assembly 295
- Lock Lever 296
- (page 4 of 4) 299
- I/O Board Housing 301
- (page 3 of 3) 302
- Transfer Drum 304
- Assembly 304
- (page 1 of 2) 305
- (page 2 of 2) 306
- Fuser Interconnect 308
- Cable Receptacle 308
- Toner Sensor (Emitter) 309
- (page 2 of 3) 311
- Cable Cover 314
- Transit Coupling 314
- Stopper Posts 318
- Temperature/Humidity Sensor 319
- (page 1 of 3) 320
- (page 3 of 3) 322
- (page 1 of 5) 323
- (page 3 of 5) 325
- (page 4 of 5) 326
- (page 5 of 5) 327
- Toner Carousel Interlock 332
- Developing Bias 333
- Contact Holder 333
- Developing 334
- Bias Contact 334
- Rocker Pin 334
- Carousel 336
- Sheet Feeder Front Cover 340
- Sheet Feeder Rear Cover 341
- Sheet Feeder Left Cover 342
- Right Corner Cover 343
- First Remove the cassette 344
- Rear Paper 348
- Pickup Assembly 348
- Front Paper 348
- Tension Spring 350
- (page 2 of 6) 351
- (page 3 of 6) 352
- 12Trim Piece Filter Covers 353
- Sensor Mount Plate 354
- (page 6 of 6) 355
- Finished Goods Parts 356
- Sheet Feeder Exploded View 357
- Switches 358
- Descriptions 359
- Locations 360
- 96.05.15.10.25 361
- Solenoids/Clutches 363
- Color LaserWriter 12/600 PS 364
- Motors/Fans/Heaters 365
- Circuit Boards 367
- Connector Locations 369
- Bulletins 372
- 0° to +2° 373
- Color LaserWriter 12/600PS 374
- Exploded View 375
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