C8402 (bizhub 360i/300i)

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Contents

Trouble type	C8402: Multi feed detection board failure (When DF-714 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) -Multi feed receiver board (MFRB) -DF control board (DFCB)

Procedure

1. Execute [Service Mode] -> [ADF] -> [Multi-Feed DetectionAdj.].
2. Check the connector between MFDB/TX-relay CN2-DFCB J32 for proper connection and correct as necessary.
3. Check the connector between MFDB/RX-MFRB J3 for proper connection and correct as necessary.
4. Check the connector between MFRB J4-DFCB J30 for proper connection and correct as necessary.
5. MFDB/TX operation check
   • Control signal: DFCB J32-1 to 3
   • Location of electrical component: DF-714 2-B
6. MFDB/RX operation check
   • Control signal: MFRB J3-1 to 3
   • Location of electrical component: DF-714 3-A
7. Replace MFRB. (Part# AAMNPP5001)
8. Replace DFCB. (Part# AAMNPP4901)

(Link to the Field Service Manual)