SC9xx: Others
D0CA/D0C9/D0C8/D0CB 6-124 SM
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC940-86 D Load SW (5V_SCN1): Overcurrent Detection
The load SW has detected and limited overcurrent.
One of the following units or the harness connected to it has shorted:
• BiCU (PCB1)
• SBU (PCB11)
• Scanner HP Sensor (S20)
• ADF Motor (M8)
• Registration Sensor (ADF) (S24)
• ADF top cover sensor (S23)
• Original Feed Sensor (S25)
• Double-feed Sensor (MFTB/ URRB) (PCB14, PCB15)
Check whether the SC occurs by removing each of the CN400, CN403, and
CN404 connectors from the BiCU (PCB1) and turning the main power OFF
and then back ON.
SC does not occur:
1. Check whether the SC occurs by pressing each of the above mentioned
connectors and turning the main power OFF and then back ON in order
to identify the malfunctioning part. Then replace the malfunctioning
harness or electrical component.
SC occurs:
1. Replace the BiCU (PCB1).
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC940-87 D Load SW5 (Optional PFU): Overcurrent Detection
The load SW has detected and limited overcurrent
• Short circuit on the BICU.
• Short circuit on the Controller Board in the optional PFU.
• Shorted harness in the optional PFU.
Check whether the SC occurs by removing the CN559 connector from the
BiCU (PCB1) and turning the main power OFF and then back ON.
SC does not occur:
1. Replace the Controller Board (PCB24) or the harness in the optional
PFU.
SC occurs:
1. Replace the BiCU (PCB1).
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