14A3: Ir Lamp Malfunction; 3Fff: Flash Rom Write Error - Konica Minolta bizhub C25 Service Manual

18. MALFUNCTION CODE
18.4.27

14A3: IR lamp malfunction

Scanner unit
Step
1 Check the exposure lamp for lighting condi-
tion when the power switch is turned ON
and, if any faulty symptom is evident, cor-
rect the scanner unit.
2 Check the MFPB/1 connector for proper
connection and correct as necessary.
3 Change scanner unit.
4 Change MFPB/1.
18.4.28

3FFF: Flash ROM write error

Print control board (PRCB)
Step
1 Check the cable and connector for proper
connection and correct as necessary.
2 Identify the specific firmware that is respon-
sible for the error.
3 Rewrite the firmware.
4 Unplug parameter chip (IC51) from PRCB
and then plug it back in.
5 Change PRCB.
6 Change MFPB/1.
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Relevant electrical parts
Action
Relevant electrical parts
Action
Field Service Ver. 1.1 May 2011
MFP board/1 (MFPB/1)
WIRING DIAGRAM
Control signal
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MFP board/1 (MFPB/1)
WIRING DIAGRAM
Control signal
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Location (electri-
cal component)
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Location (electri-
cal component)
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