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Print Quality Samples 4-3
Print Quality Samples
This section contains flawed test prints, along with a good test print for comparison. Com-
pare print samples from your customer’s print job or from test prints you’ve run with the
samples in this section. If you find a match, note the TAG (i.e., troubleshooting procedure)
listed under the sample. Turn to that TAG to begin troubleshooting. All of the TAGs are
outlined in Chapter 3, “Troubleshooting Analysis Guide (TAGs)”
If your customer’s prints show more than one problem, resolve them one at a time, in the
order in which they are listed in this section.
- Cut Sheet Printers 1
- Maintenance Manual 1
- Models C30 and C30D 1
- Printing History 2
- Trademarks 2
- Warnings and Cautions 3
- Using This Manual 4
- Other Manuals 5
- General Printer Maintenance 13
- Abbreviations and Acronyms 14
- Printer and 15
- Troubleshooting 15
- Overview 15
- Contents 16
- Theory of Operation 17
- Cycle of Operation 18
- Paper Path and Cycle Sequence 19
- Paper Path 20
- Sensor and Switch Locations 25
- Top view 26
- Front view 26
- Developer right view 26
- Developer left view 26
- Right side view 27
- Top left, duplex tray view 27
- Troubleshooting Overview 29
- • For duplex printers, press: 30
- Protocol Converters 31
- Reading the Error Log 31
- Confirming Line Power 32
- • Power-on-reset the printer 33
- Standard Procedures 35
- Producing a Developed Image 36
- Producing a Toner Patch 36
- Completing a Service Call 37
- Clearing the Error Log 38
- TAG Cross 39
- Reference Tables 39
- TAG Cross-Reference Tables 40
- Analysis Guide 53
- Yes: Go to #3 in this TAG 60
- Guide to Operations 63
- No: Continue 104
- Yes: Continue 114
- Error Code: 081, 082, 083 127
- Jobs offsetting improperly 127
- Jogging motor 127
- Error Code: 101 155
- Possible Defects: IGS board 155
- 606, 600, 610 164
- IGS board 164
- Problem Resolution 164
- TAG 600: AC Power Malfunction 170
- Wiring Table 180
- Error Code: 751 194
- Dark Horizontal Bands 204
- TAG 805: Black Prints 215
- Print Quality 255
- Print Quality Samples 257
- Sample 1: Good Quality Print 258
- Sample 2: Washout 259
- Sample 3: 260
- Blank Print 260
- Sample 4: Light Print 261
- Light Print With Background 262
- Voids of White Spots 263
- Light Vertical Streaks 264
- Blank Vertical Bands 265
- Light Horizontal Bands 266
- Black or Dark Print 267
- Areas on Prints 268
- Dark Vertical Lines 269
- Sample 13: Skewed Prints 270
- Sample 14: Misregistration 271
- Sample 15: Overtoned Print 272
- Blurred Images or Characters 273
- Varying Print Density 274
- Sample 18: Background 275
- Sample 19: Residual Images 276
- Sample 20: Wrinkles 277
- Sample 21: Fusing Problems 278
- Diagnostic 279
- Diagnostic Tests 281
- How to Run Diagnostics 281
- 001 Operator Panel Test 282
- 002 Upper Cassette Test 282
- 003 Lower Cassette Test 283
- (004 intentionally excluded) 283
- 005 Sensor Test Sequence 284
- 007 Counter Test 285
- 008 Jogging Motor Test 286
- 009 Photoconductor Test 286
- 010 Toner Supply Motor Test 287
- 011 Main Charger Test 288
- 012 Transfer Charger Test 289
- 013 Erase Lamp Test 290
- (014 intentionally excluded) 290
- 016 Duplex Feed Motor Test 292
- Diagnostic Tests 5-19 297
- 101 EIGS/MIGS Board Test 298
- Diagnostic Tests 5-21 299
- (106 intentionally excluded) 300
- • Press STOP to exit 301
- 111 LED Printhead Test 302
- (109 intentionally excluded) 303
- Wiring Diagrams 305
- • Voltage isolation diagrams 307
- Connector (J/P) Index 308
- Connector Locations 310
- J/P 43, 45, 47 311
- J/P 46, 48 311
- J/P 59, 61 311
- J/P 119, 120, 127, 128 311
- 1 2 3 4 5 6 7 8 91011121314 312
- Connectors on the Back Cover 315
- 123456789101112131516 141718 319
- 1920212223242526 319
- 27282930313233343536 319
- Voltage Isolation Diagrams 320
- (Simplex) +24 Vdc Circuits 322
- (Duplex) +12 Vdc Circuits 324
- J/P331-2 324
- J/P323-2 324
- J/P305-2 324
- Ground System 325
- Host Interface Reference 326
- IBM PC/XT to Printer 329
- IBM PC/AT to Printer 329
- RS-422 Host interface 330
- IBM Parallel to Printer 332
- DOS software 333
- Circuit Board Settings 334
- PCL Board Settings 335
- Removal/Replacement 337
- Procedures 337
- Before You Begin 340
- Front Cover Removal 341
- Back Cover Removal 342
- Lower Back Cover Removal 343
- Left Side Cover Removal 344
- Replacement Note: 345
- Ground Screw 347
- Back Detail 347
- Retaining Clip 347
- Vacuum Transport Detail 348
- Mounting Screws 348
- Top Cover Removal 350
- Top Cover Support Removal 351
- Top Cover Hinge Removal 352
- Rear Duplex Cover Removal 353
- Front DuplexCover Removal 354
- Operator Panel Removal 355
- Counter Removal 356
- IGS Board Removal 357
- PCL Board Removal 358
- Printhead Assembly Removal 359
- Disk Drive Housing Removal 361
- Cooling Fan Removal 362
- Duplex Fan Removal 363
- Toner Motor Removal 364
- AC Power Supply Removal 365
- DC Power Supply Removal 367
- High Voltage Unit Removal 368
- Paper Feed Drive Cover 369
- CN64 Bracket 369
- Mounting Screw 369
- (under CN64 bracket) 369
- Seam Sensor 370
- Front Detail 370
- Power Control Board Removal 374
- Upper Cassette Mount Removal 377
- Lower Cassette Mount Removal 381
- • Remove the cam (one screw) 382
- Upper Paper Guide Removal 384
- Upper Paper Guide 386
- Underside 386
- Lower Paper Guide Removal 387
- Paper Timing Guide Removal 388
- Cleaner Drive Belt Removal 390
- Cleaner Drive Removal 391
- Fuser Drive Belt Removal 392
- Fuser Drive Removal 393
- Paper Feed Drive Belt Removal 394
- Paper Timing Roller Removal 395
- Upper Feed Roller Removal 396
- Lower Feed Roller Removal 397
- Upper Pick-Up Roller Removal 398
- 1 Open the back cover 399
- Lower Pick-Up Roller Removal 400
- Job Offset Assembly Removal 402
- Exit Pinch Roller Removal 404
- Upper Static Brush Removal 406
- Lower Static Brush Removal 407
- Exit Roller Assembly Removal 408
- Exit Cover Removal (Simplex) 410
- Exit Cover Removal (Duplex) 412
- Paper Exit Sensor Removal 414
- Paper Full Sensor Removal 415
- Side Cover 417
- AC Power Supply 417
- Erase Lamp Removal 419
- EP Cover Removal 420
- Main Motor Removal 422
- Replacement Notes: 423
- Main Gear Drive Removal 424
- Paper Guide 427
- Registration Motor Detail 427
- Side Detail 430
- Lower Duplex 430
- Roller Cover 430
- “A” Roller Removal 432
- “B” Roller Removal 433
- “C” Roller Removal 434
- “C” Roller Solenoid Removal 435
- C-Clip Location 437
- Chapter 8 439
- Introduction 441
- 1200-Sheet/2500-Sheet Feeder 442
- Bench Test Procedure 443
- Prefeed Adjustment Procedure 444
- Input Control Board Logic 445
- 1400-Sheet Stacker 447
- Options 8-11 449
- Options 8-13 451
- Output Control Board Logic 452
- 8-16 Options 454
- General Printer 455
- Maintenance 455
- Tools/Supplies 458
- End User Cleaning Kit 458
- Printer/Maintenance Record 458
- HISTORY LOG 459
- Every-Call Cleaning Procedure 460
- Clean the Developer Unit 461
- Clean the Transfer Charger 461
- Run Test Prints 461
- Adjusting Paper Feed Tension 462
- Lubrication Procedure 465
- Front View Lubrication Tables 467
- Duplex Only 467
- Rear View Lubrication Tables 469
- Appendix A 475
- Index-3 479
- Index-5 481
- Index-7 483
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