Error Code: C-5121 Follow

Classification
PF-707m: Sub CPU control circuit initial communication abnormality

Cause
After the power becomes active and ACK is enabled, the SubCPU control circuit initial communication of PF is not performed within a specified period of time.
 

Measures to take when an alert occurs
The main body and the option stop immediately.

Estimated abnormal parts
• PF drive board (PFUDB)
• Printer control board (PRCB)
 

Solution
1. Check the connector connection between the main body and PF, and the wiring. Then repair it when there is any abnormality.
2. PF-707m: Check the connector connection on PFUDB and PRCB, and the wiring. Then repair it when there is any abnormality.
3. PF-707m: Check the connector connection between PFUDB and PRCB, and the wiring. Then repair it when there is any abnormality.
4. PF-707m: Replace PFUDB.
5. Replace PRCB.