Sony C9000 service manual 116

6Fan Motor Error

•Does the fan of the low-voltage power supply unit rotate after the printer is turned on?

	•	Yes	Does the error recur after the fan of the low-voltage power supply unit has been replaced?
		•	Yes	Replace the low-voltage power supply unit.
	▼	No	End
	•
▼	Yes		Does the engine board fan rotate after the printer is turned on?
•
	•	No	Is +32V supplied to the FAN connector Pin 1 on the engine board (K73 PWB)?
		•	No	Is +32V supplied to the POWER connector pins on the engine board (K73 PWB)?
				+32V: Pin 7, 8, 9, 10
				No	Check cable connection or replace the low-voltage power supply unit.
		▼	Yes	Replace the engine board.
		•
	▼	Yes	Replace the fan of the engine board.
	•
▼	Yes		Does the fuser fan rotate after the printer is turned on?
•
	•	No	Is +32V supplied to the JOBOFF connector Pin 5 on the engine board (K73 PWB)?
		•	No	Is +32V supplied to the POWER connector pins on the engine board (K73 PWB)?
				+32V: Pin 7, 8, 9, 10
				No	Check cable connection, or replace the low-voltage power supply unit.
		▼	Yes	Replace the engine board.
		•
	▼	Yes	Replace the fuser fan.
	•
▼	Yes		End
•

41388601TH Rev.2 116 /