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Trouble type C3B09: IH communication error

Rank C

Trouble detection condition No signal has been received from the fusing CPU a predetermined number of consecutive times.

Trouble isolation -

Relevant electrical parts • Fusing unit

• IH coil (IHC)

• IH power supply (IHPU)

• IH magnetic erasing board (IHMEB)

• NF board (NFB)

• MFP board (MFPB)

(2) Procedure

1. Check the fusing unit for correct installation (whether it is secured in position).

2. Check the open/close operation of the right door.

3. Check the fusing unit-MFPB CN22E for proper connection and correct or change as necessary.

4. Check the connector between MFPB CN13E-NFB CN3 for proper connection and correct as necessary.

5. Check the connector between NFB CN2-IHPU CN1 for proper connection and correct as necessary.

6. Check the connector between IHPU-IHC for proper connection and correct as necessary.

7. Check the connector between IHC-IHMEB for proper connection and correct as necessary.

8. Replace the fusing unit.

9. Replace IHC.

10. Replace IHPU.

11. Replace IHMEB.

12. Replace MFPB.

13. Replace NFB.

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