E803 (The output voltage of the composite power PCB has a fault.)
Composite power supply PCB (J208) Continuity
DC controller PCB
Composite power supply PCB
If it does not turn on, see "The scanning lamp fails to turn on."
If it turns on but is dark, replace it (its ends may be blackened).
Correct the connection.
Connect it securely.
Replace the harness.
Replace the DC
Replace the composite
power supply PCB.
Turn off and then on the main power. Is the problem corrected?
Does the scanning lamp turn on when the Copy Start key is pressed? Or, is it dark after it has turned on. Is the connection between J111 on
the DC controller PCB and J204 on the composite power PCB good?
Is the connection of the connector J208 on the composite power
supply PCB normal? Check the 24-VDC line between
J111 and J204. Is its continuity good? Is there an output of 24 VDC at the J111-1 and J111-3 on the DC controller PCB