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C8402 (bizhub 950i/850i)
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Contents
Trouble type | C8402: Multi feed detection board failure |
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 DF firmware version and update it to the latest version.
- Check the connector between MFDB/TX-relay CN114-DFCB CN23 for proper connection and correct as necessary.
- Check the connector between MFDB/RX-DFCB CN22 for proper connection and correct as necessary.
- MFDB/TX operation check
- Control signal: DFCB CN23-1 to 3
- Location of electrical component: DF 11-J
- MFDB/RX operation check
- Control signal: DFCB CN22-1 to 4
- Location of electrical component: DF 10-J
- Replace the multi feed detection boards for MFDB/TX and MFDB/RX together as a set.
- Replace DFCB.