d-Color MF4003/MF3303
L TROUBLESHOOTING > 3. TROUBLE CODE
L-55
Trouble detection condition When the main power switch ON or when the original is being conveyed, the AD value there is no paper loaded
state is out of the predetermined range.
Trouble isolation DF
Relevant electrical parts • Multi feed detection board/TX (MFDB/TX)
• Multi feed detection board/RX (MFDB/RX)
• DF control board (DFCB)
Procedure
1. Check the connector between MFDB/TX CN111-relay CN114-DFCB CN1 for proper connection and correct as necessary.
2. Check the connector between MFDB/RX CN110-relay CN115-DFCB CN1 for proper connection and correct as necessary.
3. MFDB/TX operation check
• Control signal: DFCB CN1-6
• Location of electrical component: 23-X
4. MFDB/RX operation check
• Control signal: DFCB CN1-3
• Location of electrical component: 23-X
5. MFDB/TX ICP1 conduction check
6. Replace MFDB/TX.
7. Replace MFDB/RX.
8. Replace DFCB.
3.14.4C8403
Contents
Trouble type C8403: Initial data failure
Rank C
Trouble detection condition No initial data available for the shading repair function is stored in the storage board (STRGB) and the CPU board
(CPUB).
Trouble isolation -
Relevant electrical parts • Storage board (STRGB)
• CPU board (CPUB)
• Base board (BASEB)
Procedure
1. Select [Service Mode] -> [ADF] -> [Shading Repair] -> [Init. Data Input] and perform the function.
2. Check STRGB for proper installation and correct as necessary.
3. Check CPUB for proper installation and correct as necessary.
4. Replace STRGB.
5. Replace CPUB.
6. Replace BASEB.
3.15C9###
3.15.1C9401, C9402
Contents
Trouble type • C9401: CIS LED lighting failure (front side)
• C9402: CIS LED lighting abnormally (front side)
Rank B
Trouble detection condition • C9401: At the CIS gain adjustment, the machine detected that the output of the CIS LED is lower than the
specified value.
• C9402: The average output value of the CIS LED with the scanner at its standby position is a predetermined
value or more at the end of a scan job.
Trouble isolation Scanner
Relevant electrical parts • Flat cable
• CIS module (IR CIS)
• CPU board (CPUB)
• Base board (BASEB)
Procedure
1. Check the connector between IR CIS-BASEB CN6 for proper connection and correct as necessary.
2. Check CPUB for proper installation and correct as necessary.
3. Replace the flat cable.
4. Replace IR CIS.
5. Replace CPUB.
6. Replace BASEB.
3.15.2C9403, C9404
Contents
Trouble type • C9403: CIS LED lighting failure (back side)
• C9404: CIS LED lighting abnormally (back side)
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