Ricoh G092 Service Manual page 15

TROUBLESHOOTING
4. TROUBLESHOOTING.....................................................................4-1
4.1 SERVICE CALL CONDITIONS .........................................................................4-1
4.1.1 SUMMARY..................................................................................................4-1
4.1.2 SC CODE DESCRIPTIONS .....................................................................4-2
4.2 CONTROLLER ERROR .....................................................................................4-6
4.3 TROUBLESHOOTING GUIDE ........................................................................4-10
4.3.1 BLANK PRINT ..........................................................................................4-10
4.3.2 ALL-BLACK PRINT..................................................................................4-10
4.3.3 MISSING CMY COLOR ..........................................................................4-11
4.3.4 LIGHT PRINT............................................................................................4-11
4.3.5 REPEATED SPOTS OR LINES ON PRINTS......................................4-12
4.3.6 DARK VERTICAL LINE IN PRINT ........................................................4-12
4.3.7 WHITE HORIZONTAL LINES OR BANDS ..........................................4-13
4.3.8 MISSING PARTS OF IMAGES..............................................................4-13
4.3.9 DIRTY BACKGROUND...........................................................................4-13
4.3.10 PARTIAL CMY COLOR DOTS ............................................................4-13
4.3.11 DARK IRREGULAR STREAKS ON PRINTS ....................................4-13
4.3.12 CMY COLOR IRREGULAR STREAKS..............................................4-14
4.3.13 GHOSTING.............................................................................................4-14
4.3.14 UNFUSED OR PARTIALLY FUSED PRINTS...................................4-14
4.3.15 IMAGE SKEW ........................................................................................4-14
4.3.16 BACKGROUND STAIN.........................................................................4-15
4.3.17 NO PRINTING ON PAPER EDGE ......................................................4-15
4.3.18 IMAGE NOT CENTERED WHEN IT SHOULD BE ..........................4-15
4.4 ELECTRICAL COMPONENT DEFECTS.......................................................4-16
4.4.1 SENSORS .................................................................................................4-16
4.5 BLOWN FUSE COND ITIONS ..........................................................................4-18
Power supply unit..........................................................................................4-18
High voltage unit ...........................................................................................4-18
4.6 LEDS....................................................................................................................4-18
SERVICE TABLES
5. SERVICE TABLES ..........................................................................5-1
5.1 SERVICE PROGRAM MODE............................................................................5-1
5.1.1 SERVICE MODE OPERATION ...............................................................5-1
Entering the Service Mode ............................................................................5-1
Accessing the Required Program ................................................................5-2
Inputting a Value or Setting for a Service Program ...................................5-2
Exiting Service Mode......................................................................................5-2
5.2 PRINTER CONTROLLER SERVICE MODE...................................................5-3
5.2.1 SERVICE (CONTROLLER SERVICE MODES) ...................................5-3
Bit Switch Settings ..........................................................................................5-5
Gamma Adjustment ........................................................................................5-7
5.3 PRINTER ENGINE SERVICE MODE.............................................................5-10
SM iii G081/G092