C8402 (bizhub C750i)
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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 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 DFCB. (Part# AAMPH00105)