d-Color MF4003/MF3303
L TROUBLESHOOTING > 3. TROUBLE CODE
L-41
2. Check the connector between FM1-relay CN101-CUDB CN2 for proper connection and correct as necessary.
3. Check the connector between FM2-relay CN102-CUDB CN2 for proper connection and correct as necessary.
4. Check the connector between FM3-relay CN103-CUDB CN2 for proper connection and correct as necessary.
5. Check the fan for possible overload and correct as necessary.
6. Check CPUB for proper installation and correct as necessary.
7. FM1 load check
• Check code: 42
• Multi code: 9, 10
• Control signal: CUDB CN2-1 (REM), CUDB CN2-3 (LOCK)
• Location of electrical component: 27-L
8. FM2 load check
• Check code: 42
• Multi code: 9, 10
• Control signal: CUDB CN2-4 (REM), CUDB CN2-6 (LOCK)
• Location of electrical component: 28-L
9. FM3 load check
• Check code: 42
• Multi code: 9, 10
• Control signal: CUDB CN2-7 (REM), CUDB CN2-9 (LOCK)
• Location of electrical component: 28-L
10. Replace the defective fan. (FM1 / FM2 / FM3)
11. Replace CUDB.
12. Replace CPUB.
13. Replace BASEB.
3.11.4C5372
Contents
Trouble type C5372: MFP control board CPU temperature failure
Rank C
Trouble detection condition Temperature failure of CPU on the CPU board was detected.
Trouble isolation -
Relevant electrical parts • CPU cooling fan (FM3)
• CPU board (CPUB)
• Base board (BASEB)
Procedure
1. Check the connector between FM3-BASEB CN17 for proper connection and correct as necessary.
2. Check the fan for possible overload and correct as necessary.
3. Check CPUB for proper installation and correct as necessary.
4. FM3 operation check
• Control signal: BASEB CN17-1 to 2
• Location of electrical component: 21-I
5. Replace CPUB.
6. BASEB ICP1 conduction check
7. Replace BASEB.
3.11.5C5501
Contents
Trouble type C5501: AC signal abnormality
Rank C
Trouble detection condition The zero cross signal is not input.
Trouble isolation -
Relevant electrical parts • Fusing unit
• DC power supply (DCPS)
• CPU board (CPUB)
• Base board (BASEB)
Procedure
1. Check the fusing unit for correct installation (whether it is secured in position).
2. Check the connector between DCPS CN6-BASEB CN1E for proper connection and correct as necessary.
3. Check the connector between the fusing unit-relay CN2-DCPS CN2 for proper connection and correct as necessary.
4. Check CPUB for proper installation and correct as necessary.
5. Replace the fusing unit.
6. Replace CPUB.
7. Replace BASEB.
8. Replace DCPS.
3.11.6C5601
Contents
Trouble type C5601: Engine control malfunction
Rank C
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