SM iii G104/G160/G161 
TROUBLESHOOTING 
4.  TROUBLESHOOTING ................................................................. 4-1 
4.1  PROCESS CONTROL RESULT ...............................................................4-1 
4.2  SERVICE CALL CONDITIONS .................................................................4-2 
4.2.1  SUMMARY .......................................................................................4-2 
4.2.2  SC CODE DESCRIPTIONS .............................................................4-3 
Engine SC.............................................................................................4-3 
Controller Error ...................................................................................4-14 
4.3  TROUBLESHOOTING GUIDE ................................................................4-21 
4.3.1  BLANK PRINT ................................................................................4-21 
4.3.2  ALL-BLACK PRINT.........................................................................4-21 
4.3.3  MISSING CMY COLOR..................................................................4-22 
4.3.4  LIGHT PRINT .................................................................................4-22 
4.3.5  REPEATED SPOTS OR LINES ON PRINTS .................................4-23 
4.3.6  DARK VERTICAL LINE IN PRINT..................................................4-23 
4.3.7  WHITE HORIZONTAL LINES OR BANDS .....................................4-24 
4.3.8  MISSING PARTS OF IMAGES.......................................................4-24 
4.3.9  DIRTY BACKGROUND ..................................................................4-24 
4.3.10  PARTIAL CMY COLOR DOTS .....................................................4-24 
4.3.11  DARK IRREGULAR STREAKS ON PRINTS................................4-24 
4.3.12  CMY COLOR IRREGULAR STREAKS ........................................4-25 
4.3.13  GHOSTING ..................................................................................4-25 
4.3.14  UNFUSED OR PARTIALLY FUSED PRINTS ..............................4-25 
4.3.15  IMAGE SKEW ..............................................................................4-25 
4.3.16  BACKGROUND STAIN ................................................................4-26 
4.3.17  NO PRINTING ON PAPER EDGE................................................4-26 
4.3.18  IMAGE NOT CENTERED WHEN IT SHOULD BE .......................4-26 
4.4  ELECTRICAL COMPONENT DEFECTS ................................................4-27 
4.4.1  SENSORS ......................................................................................4-27 
4.5  BLOWN FUSE CONDITIONS .................................................................4-29 
Power supply unit ...............................................................................4-29 
IOB......................................................................................................4-29 
4.6 LEDS ........................................................................................................4-29 
 
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 
5.1.2  REMARKS........................................................................................5-3 
Display on the Control Panel Screen ....................................................5-3 
Others ...................................................................................................5-4