C4002 (bizhub C754e/C654e)
| Trouble type | PH communication error |
| Trouble code | C4002 |
| Rank | C |
| Detection timing | When the PH relay board (PHRYB) is receiving data, a communication error is detected. |
| Trouble isolation | – |
| Relevant electrical parts | • PH relay board (PHRYB) • Printer control board (PRCB) |
(2)Procedure
| Step | Action | Control signal | Location of electrical components |
| 1 | Turn OFF the main power switch, disconnect and then connect the power cord. Wait for 10 sec. or more after connect the power cord, and turn ON the main power switch. | – | – |
| 2 | PRCB ICP17 conduction check | – | – |
| 3 | Replace PRCB (Part# A2X0H00S06) | – | – |
| 4 | PHRYB ICP1 conduction check | – | – |
| 5 | Replace PHRYB (Part# A2X0H00300) | – | – |
- Link to the layout drawings for related parts by each trouble code (S.77. C4002)
Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.
K.3.9.1 (Link to the Field Service Manual)