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C8402 (bizhub C4050i/C3350i)
Contents
Trouble type | C8402: Multi feed detection board failure (When UK-P19 is installed) |
Rank | C |
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
- Check the connector between MFDB/TX CN111-relay CN114-DFCB CN7 for proper connection and correct as necessary.
- Check the connector between MFDB/RX CN110-relay CN115-DFCB CN7 for proper connection and correct as necessary.
- MFDB/TX operation check
- Control signal: DFCB CN7-6
- Location of electrical component: 23-X
- MFDB/RX operation check
- Control signal: DFCB CN7-3
- Location of electrical component: 23-X
- MFDB/TX ICP1 conduction check
- Replace MFDB/TX. (Part# ACCNH00100)
- Replace MFDB/RX. (Part# ACCNH00200)
- Replace DFCB. (Part# A93EH00901)
Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.
L.3.13.3 (Link to the Field Service Manual)