d-Color MF4003/MF3303
L TROUBLESHOOTING > 13. TROUBLES THAT DO NOT DISPLAY THE TROUBLE
CODE
L-119
13. TROUBLES THAT DO NOT DISPLAY THE TROUBLE CODE
13.1Machine is not energized at all (DCPS operation check)
Contents
Trouble type Machine is not energized at all
Rank -
Trouble detection condition -
Trouble isolation -
Relevant electrical parts • Base board (BASEB)
• DC power supply (DCPS)
Procedure
Step Check item Location of electrical
component
Result Action
1 Is a power voltage supplied across CN1-1 and
2 on DCPS?
7-V NO Check the wiring from power outlet to
DCPS CN1.
2 Are the fuses on DCPS conducting? - NO Replace DCPS.
3 Is DC5 V being output to CN5-1, 2 on DCPS? 7-S NO Replace DCPS.
4 Is DC24 V being output to CN4-3 on DCPS? 9-S NO • Check the wiring from the wall
BASEB to DCPS.
• Replace DCPS.
• Replace BASEB.
5 The LED on BASEB is blinking? - NO Replace BASEB.
6 Is DC24 V being output to CN4-6 on DCPS? 9-S NO Replace DCPS.
13.2Fusing heaters do not operate
Contents
Trouble type Fusing heaters do not operate
Rank -
Trouble detection condition -
Trouble isolation -
Relevant electrical parts • Right door switch (SW5)
• DC power supply (DCPS)
• Base board (BASEB)
• Fusing unit
Procedure
Step Check item Location of electrical
component
Result Action
1 Is a power voltage supplied across CN1-1 and
2 on DCPS?
During this time, the right door should be
closed.
7-V NO Check the wiring from power outlet to
DCPS to SW5.
2 Is the power source voltage applied across
DCPS CN6?
8-T YES Replace the fusing unit.
NO • Check the wiring from DCPS CN6 to
BASEB CN1E.
• Replace DCPS.
• Replace BASEB.
13.3Power is not supplied to DF
Contents
Trouble type DF is not energized at all
Rank -
Trouble detection condition -
Trouble isolation -
Relevant electrical parts • DC power supply (DCPS)
• DF
Procedure
Step Check item Location of electrical
component
Result Action
1 Is DC24 V being output to CN8-4, 5 on
DFCB?
23-S YES Malfunction in DF.
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