Error Code: C-4718 Follow

Classification
Main body: APC abnormality (Y)

Cause
APC abnormality.
The laser does not become active because 12 VDC power source for driving laser is not fed, MPC is wrong, or the laser is defective.

Measures to take when an alert occurs
The main body stops immediately to turn OFF the power relay (RL1).
 

Estimated abnormal parts
• Image processing board (IPB)
• Writing unit/Y
 

Correction
Note
▪ The message "Please turn on power again" is displayed on the touch panel.
 

Solution
1. Perform the IO Check (99-70) and check if there is a problem with the writing unit (only LDB1 to LDB4) or IPB.
• When the results are abnormal for LDB1 to LDB4, perform solution 2 and solution 3.
• When the results are abnormal for IPB, perform solution 2 and solution 4.
• When all of the results are normal, perform solution 2 and solution 3.
2. Check the connector connection between IPB and the writing unit, and the wiring. Then repair it when there is any abnormality.
3. Replace the writing unit.
4. Replace IPB