Ricoh G104 Service Manual page 305

1. INSTALLATION PROCEDURE ............................................... 1-1
1.1 INSTALLATION REQUIREMENTS....................................................... 1-1
1.2 OPTIONAL UNIT INSTALLATION ........................................................ 1-2
2. PREVENTIVE MAINTENANCE ............................................... 2-1
2.1 USER REPLACEABLE ITEMS ............................................................. 2-1
2.2 SERVICE MAINTENANCE ................................................................... 2-2
2.2.1 RECOMMENDED CLEANING PROCEDURE ............................. 2-2
3. REPLACEMENT AND ADJUSTMENT.................................... 3-1
3.1 BEFORE YOU START.......................................................................... 3-1
3.2 LASER OPTICS .................................................................................... 3-2
3.2.1 CAUTION DECAL LOCATIONS .................................................. 3-2
3.2.2 LD UNIT ....................................................................................... 3-2
3.3 FUSING ................................................................................................ 3-6
3.3.1 THERMISTOR AND THERMOSTAT ........................................... 3-6
3.4 ELECTRICAL COMPONENTS ............................................................. 3-9
3.4.1 CONTROLLER BOARD............................................................... 3-9
3.4.2 INSTALLING THE NEW NVRAM............................................... 3-10
4. TROUBLESHOOTING............................................................. 4-1
4.1 PROCESS CONTROL RESULTS......................................................... 4-1
4.2 SERVICE CALL CONDITIONS ............................................................. 4-3
4.2.1 SUMMARY................................................................................... 4-3
4.2.2 SC CODE DESCRIPTIONS......................................................... 4-3
4.3 TROUBLESHOOTING GUIDE............................................................ 4-32
4.3.1 BLANK PRINT ........................................................................... 4-32
4.3.2 ALL-BLACK PRINT.................................................................... 4-32
4.3.3 MISSING CMY COLOR ............................................................. 4-32
4.3.4 LIGHT PRINT............................................................................. 4-33
4.3.5 REPEATED SPOTS OR LINES ON PRINTS ............................ 4-33
4.3.6 DARK VERTICAL LINE ON PRINTS ......................................... 4-34
4.3.7 WHITE HORIZONTAL LINES OR BANDS ................................ 4-34
4.3.8 MISSING PARTS OF IMAGES .................................................. 4-35
4.3.9 DIRTY BACKGROUND.............................................................. 4-35
4.3.10 PARTIAL CMY COLOR DOTS ................................................ 4-35
4.3.11 DARK IRREGULAR STREAKS ON PRINTS ........................... 4-35
4.3.12 CMY COLOR IRREGULAR STREAKS.................................... 4-35
4.3.13 GHOSTING.............................................................................. 4-36
4.3.14 UNFUSED OR PARTIALLY FUSED PRINTS.......................... 4-36
4.3.15 IMAGE SKEW.......................................................................... 4-36
SM
CÓPIA NÃO CONTROLADA
G160/G161
TABLE OF CONTENTS
CÓPIA NÃO CONTROLADA
i G160/G161