CHAPTER 6 SELF DIAGNOSIS
6-34
E803
0000
The 24V output from the composite main power supply PCB is absent for 1
sec or more.
Main cause
The wiring is faulty (short circuit, open circuit). The composite power sup-
ply PCB is faulty. The DC controller PCB is faulty.
Making Corrections
1. Connectors
Are the connectors J204 on the main power supply PCB and the connector
J300 on the DC controller PCB connected securely?
NO:
Connect the connectors securely.
2. Main power supply PCB
Is 24 V supplied by the main power supply PCB (J204) to the DC controller
PCB (J300)?
(J204-5 <-> J300-5: OVU3, J204-6 <-> J300-6: OVU3,
J204-7 <-> J300-7: 24VU3, J204-8 <-> J300-8: 24VU3)
NO:
Replace the main power supply PCB.
YES: Replace the DC controller PCB.
