Ricoh Aficio Color 4006, Service Manual

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VIII
6.5 LASER OPTICS SECTION..................................................................... 6-34
6.5.1 POLYGON MIRROR MOTOR REPLACEMENT............................ 6-35
6.5.2 LASER SYNCHRONIZING DETECTOR BOARD AND LD UNIT
REPLACEMENT ...................................................................................... 6-37
6.5.3 SQUARENESS ADJUSTMENT ..................................................... 6-38
6.6 DEVELOPMENT UNIT ........................................................................... 6-40
6.6.1 REPLACING THE DEVELOPER ................................................... 6-40
Developer Collection Procedure......................................................... 6-40
Installing New Developer ................................................................... 6-43
6.6.2 POST DEVELOPER COLLECTION PROCEDURE....................... 6-46
6.6.3 DEVELOPMENT UNIT REPLACEMENT....................................... 6-47
6.6.4 TONER COLLECTION TRAY CLEANING..................................... 6-48
6.7 TRANSFER BELT UNIT ......................................................................... 6-49
6.7.1 TRANSFER BELT SECTION......................................................... 6-49
Transfer Belt and Cleaning Unit ......................................................... 6-49
Cleaning Blade Replacement............................................................. 6-52
Lubricant Bar and Lubricant Brush Replacement............................... 6-53
6.7.2 PAPER TRANSFER UNIT ............................................................. 6-54
Lubricant Bar And Blade Replacement .............................................. 6-54
Paper Separation Corona Wire Replacement .................................... 6-54
Transfer Roller Replacement ............................................................. 6-55
6.8 PAPER FEED AND REGISTRATION SECTION.................................... 6-56
6.8.1 BY-PASS FEED TABLE REMOVAL .............................................. 6-56
6.8.2 BY-PASS PAPER WIDTH DETECTION BOARD REPLACEMENT6-56
6.8.3 BY-PASS FEED, PICK-UP AND SEPARATION ROLLERS,
AND TORQUE LIMITER REPLACEMENT .................................... 6-57
6.8.4 BY-PASS FEED UNIT REPLACEMENT........................................ 6-58
6.8.5 REGISTRATION SENSOR REPLACEMENT ................................ 6-58
6.8.6 VERTICAL TRANSPORT DOOR REPLACEMENT....................... 6-59
6.8.7 PAPER TRAY PICK-UP, PAPER FEED, AND SEPARATION
ROLLER REPLACEMENT............................................................. 6-59
6.8.8 PAPER FEED UNIT AND CLUTCH REPLACEMENT ................... 6-60
6.8.9 COPY IMAGE AREA ADJUSTMENT ............................................ 6-61
Preparation ........................................................................................ 6-61
Leading Edge Registration ................................................................. 6-62
Side-to-side Registration .................................................................... 6-63
6.9 PAPER TRANSPORT, FUSING, AND PAPER EXIT SECTIONS .......... 6-64
6.9.1 FUSING UNIT REMOVAL ............................................................. 6-64
6.9.2 TRANSPORT UNIT REMOVAL ..................................................... 6-65
6.9.3 FUSING UNIT TOP COVER REMOVAL ....................................... 6-66
6.9.4 OIL SUPPLY PAD AND OIL BLADE REPLACEMENT.................. 6-67
6.9.5 HOT ROLLER THERMOFUSE REPLACEMENT .......................... 6-68
6.9.6 FUSING UNIT DISASSEMBLY...................................................... 6-68
6.9.7 CLEANING ROLLER SCRAPER CLEANING................................ 6-69
6.9.8 HOT ROLLER THERMISTOR REPLACEMENT............................ 6-70
6.9.9 HOT ROLLER FUSING LAMP REPLACEMENT ........................... 6-71
6.9.10 HOT ROLLER AND CLEANING ROLLER REPLACEMENT
AND CLEANING........................................................................... 6-72