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1. Check the fixing unit for binds
-There may be a bind in the fixing unit that impedes the movement of the fixing motor.
2. Check the fixing motor connector
3. Check the Main power supply PCB (also known as the Switching Regulator)
-Is the drive voltage (24VDC) of the fixing motor supplied by the main power supply PCB present?
-The Main power supply PCB (also known as the Switching Regulator) can be checked by checking for 24VDC on J202-3 (24VU1-S) and J202-4 (OVU1).
-NO 24VDC: Replace the main power supply PCB.
4. Check the Fixing motor (M4) and DC controller PCB
-Press the Start key. Is the lock signal of the fixing motor present at the connector (J312) on the DC controller PCB?
-Lock signal: J312-B4 (FSRM_LOCK*) Does the signal from the DC controller PCB change from 0 to about 5 V when the Start key is pressed?
-YES: Replace the fixing motor.
-NO: Replace the DC controller PCB.
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