Error Code: C-4521 Follow

Classification
Main body: Color registration abnormality
 

Cause
The color registration base line correction/Fr has terminated abnormally.
 

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

Estimated abnormal parts
• Printer control board (PRCB)
• IDC sensor/Fr (IDCS1)
• IDC sensor shutter solenoid (SD4)
• Intermediate transfer belt
 

Solution
1. Check the shutter and around the IDC sensor, and clean or replace it if there is any dirt or abnormality.
2. Check the intermediate transfer belt, and clean or replace it if there is any dirt or abnormality.
3. Check the connector connection between PRCB and IDCS1, and the wiring. Then repair it when there is any abnormality.
4. Check the IO Check (36-03) of IDCS1 with the IO Check (55-00) of SD4, and the operation, and repair or replace it when there is any abnormality. (Wiring diagram: Main body (2/5): 16-I)
Note
▪ The output check on the IO check mode has restrictive conditions. Check the IO check mode list before the output check.
5. Replace IDCS1.
6. Replace PRCB.
7. Replace SD4 and PRCB at a time.