Gestetner G056 Service Manual page 278

3.13 POWER SUPPLY UNIT AND HIGH VOLTAGE SUPPLY BOARD .......3-18
3.14 IMAGE ADJUSTMENT..........................................................................3-19
3.14.1 REGISTRATION ADJUSTMENT..................................................3-19
3.14.2 PARALLELOGRAM IMAGE ADJUSTMENT ................................3-19
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 ............................................................................4-4
4.3 ELECTRICAL COMPONENT DEFECTS ..................................................4-6
4.3.1 SENSORS ........................................................................................4-6
4.3.2 SWITCHES.......................................................................................4-6
4.4 BLOWN FUSE CONDITIONS ...................................................................4-7
4.5 LEDS .........................................................................................................4-7
4.6 FIRMWARE HISTORY ..............................................................................4-8
4.6.1 G056/G058 FIRMWARE MODIFICATION HISTORY.......................4-8
SERVICE TABLES
5. SERVICE TABLES...................................................................... 5-1
5.1 SERVICE PROGRAM MODE....................................................................5-1
5.1.1 ENABLING AND DISABLING SERVICE PROGRAM MODE ...........5-1
Entering the Service Mode....................................................................5-1
Accessing the Required Program .........................................................5-1
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 MODE MENU ( 1. SERVICE MENU )............................5-3
5.2.2 BIT SWITCH PROGRAMMING ........................................................5-3
5.3 PRINTER ENGINE SERVICE MODE........................................................5-4
5.3.1 SERVICE MODE TABLE ( 2. ENGINE MAINTE ) ..........................5-4
Memory Clear .......................................................................................5-8
5.3.2 INPUT CHECK TABLE ...................................................................5-10
Table 1: Paper Size Switch (Main Unit) ..............................................5-11
Table 2: Paper Size Switch (optional paper tray)................................5-12
Table 3: Paper Height Sensor (standard cassette) .............................5-12
Table 4: Paper Height Sensor (optional paper tray)............................5-12
5.3.3 OUTPUT CHECK TABLE ...............................................................5-13
5.4 FIRMWARE UPDATE PROCEDURE......................................................5-14
5.4.1 CONTROLLER/NIB/ENGINE FIRMWARE UPDATE......................5-14
5.4.2 ERROR RECOVERY......................................................................5-15
Controller ............................................................................................5-15
NIB/Engine Board ...............................................................................5-15
5.5 POWER-ON SELF TEST ........................................................................5-16
5.6 OTHER TESTS .......................................................................................5-16
5.7 USER PROGRAM MODE .......................................................................5-17
G056/G058 ii
Rev. 05/2000
SM