OKI C532dn

3.1 Checking for loss of synchronization of motor (driver failure)

Check item	Checking method	Action in case of NG
Operation of each motor	Check whether each motor operates properly using the selfdiagnosis mode. Check by detection of a load. Noise that sounds like "pooh" is made when there is a fault.	Replace CU/PU board and SU board.
Condition of each motor cable	Check the wiring of each motor. Check for a short circuit by visual check and using a tester. Disconnect the motor cable from the PCB and check the resistance between the FG and each pin of the disconnected cable.	Replace the motor cable. Correct the wiring.

3.2 Checking for loss of synchronization of motor (load by consumables)

Check item	Checking method	Action in case of NG
Operation of each motor	Check whether each motor operates properly using the selfdiagnosis mode. Check by detection of a load. Noise that sounds like "pooh" is made when there is a fault.	Replace the consumable(s).

3.3 Check for gear jumping (load by consumables)

Check item	Checking method	Action in case of NG
Operation of each motor	Check whether each motor operates properly using the selfdiagnosis mode. Check by detection of a load. Noise that sounds like "batz batz" is made when there is a fault.	Replace the consumable(s).
Position of consumables	Check visually whether each consumable gear is in place and they engage with one another.	Replace or repair mechanical part(s).

3.4 Checking cable wiring

Check item	Checking method	Action in case of NG
Cable wiring around cooling fans	Check whether a cable touches the blades of a fan as the cable is not properly laid. When it does, noise that sounds like "clack clack" is made.	Lay the cable properly.