SM vii D017/D018/D019/D020
4.1.2 SC CODE DESCRIPTIONS ..............................................................4-2
4.2 SELF-DIAGNOSTIC MODE .....................................................................4-35
4.2.1 SELF-DIAGNOSTIC MODE AT POWER ON ..................................4-35
Self-Diagnostic Test Flow Chart..........................................................4-36
4.2.2 DETAILED SELF-DIAGNOSTIC MODE..........................................4-37
Purpose ..............................................................................................4-37
Executing Detailed Self-Diagnosis ......................................................4-37
4.3 PAPER FEED TROUBLESHOOTING ......................................................4-39
4.4 SKEWED IMAGE......................................................................................4-40
4.5 IMAGE PROBLEMS .................................................................................4-41
4.5.1 SKEWED, TRAPEZOID AND PARALLELOGRAM IMAGES...........4-41
Skewed Images ..................................................................................4-41
Trapezoid Images ...............................................................................4-42
Parallelogram Images .........................................................................4-43
4.5.2 CHECKING IMAGES WITH THE TRIMMING PATTERN................4-44
4.5.3 CORRECTING THE IMAGES .........................................................4-45
Correcting Skewed Images.................................................................4-45
Correcting Trapezoid Images..............................................................4-49
Correcting Parallelogram Images........................................................4-50
4.6 ELECTRICAL COMPONENT DEFECTS..................................................4-51
4.6.1 SENSORS .......................................................................................4-51
4.6.2 SWITCHES......................................................................................4-58
4.7 BLOWN FUSE CONDITIONS ..................................................................4-59
SERVICE TABLES
5. SERVICE TABLES....................................................................... 5-1
5.1 SERVICE PROGRAM MODE.....................................................................5-1
5.1.1 SERVICE MODE LOCK/UNLOCK ....................................................5-1
5.1.2 SERVICE PROGRAM MODE OPERATION......................................5-1
Overview...............................................................................................5-1
Entering and Exiting SP mode ..............................................................5-2
SP Mode Button Summary ...................................................................5-2
Switching Between SP Mode and Copy Mode for Test Printing............5-3
Selecting the Program Number.............................................................5-3
5.1.3 COMMONLY USED SP CODES AND FEATURES ..........................5-4
Test Pattern Printing (SP2902) .............................................................5-5
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