d-Color MF4003/MF3303
L TROUBLESHOOTING > 13. TROUBLES THAT DO NOT DISPLAY THE TROUBLE
CODE
L-120
Step Check item Location of electrical
component
Result Action
2 Is DC24 V being output to CN4-3 on DCPS? 9-S NO Check the wiring from the wall DCPS to
DF.
3 Are the fuses on DCPS conducting? - YES Replace DCPS.
NO Malfunction in DF.
13.4Power is not supplied to option
13.4.1PF-P20/PF-P21
Contents
Trouble type Power is not supplied to PF-P20/PF-P21.
Rank -
Trouble detection condition -
Trouble isolation -
Relevant electrical parts • DC power supply (DCPS)
• PF-P20/PF-P21
Procedure
Step Check item Location of electrical
component
Result Action
1 Is DC24 V being output to CN1-3, 4 on
PCCB?
18-S NO Malfunction in paper feed unit.
2 Is DC24 V being output to CN4-5 on DCPS? 9-S NO Check the wiring from the wall DCPS to
BASEB to PCCB.
3 Are the fuses on DCPS conducting? - YES Replace DCPS.
NO Malfunction in paper feed unit.
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