Sony C9000 service manual 107

1The printer does not work normally after turned on.

•Turn off the printer, wait a few seconds, then turn it on again.

• Is displayed on the LCD (for about 1 second)?

•	No	Is the AC cable connected correctly?
		No	Connect the AC cable correctly.
▼	Yes	Is +5V supplied to the PANEL connector pins on the PU board (K73 PWB)?
•
		+5V: Pin 5		0V: Pin 2
		Yes	Is the operator panel cable connected correctly?
			No	Connect the cable correctly.
		▼
		Yes	Replace the operator panel cable. Recovered?
			No	Replace the cover assembly of the operator panel.
		▼
		Yes	End
▼	No	Is +5V supplied on the POWER connector of the engine board (K73 PWB)?
•
		Pin 11,12, 13, 14: +5V Pin 3, 4, 5, 6, 23, 24, 25, 26, 27, 28, 29, 30: 0V

▼

• Yes

▼

• Yes

No Check the connection of the POWER connector, or replace the low-voltage power supply unit.

Replace the engine board.

Are the following voltages supplied to the PU connector of the main board?

Pin 137-147, 187-197: +5V	Pin 125-136,	175-186:	+3.3V
Pin 148, 198: +12V	Pin 101-124,	149-174,	199, 200: 0V

		Yes Is the main board assy inserted correctly?
		No	Insert it correctly.
		Yes	Replace the main board.
▼	No	Are the following voltages supplied on the POWER connector of the engine board?
•
		Pin 11, 12, 13, 14: +5V		Pin 15, 16, 17, 18: +3.3V
		Pin 1: +12V Pin 2: -12V		Pin 7, 8, 9, 10: +32V
		Pin 3, 4, 5, 6, 25, 26, 27, 28: 0V
		Yes Replace the engine board.
▼	No	Replace the low-voltage power supply unit.
•

41388601TH Rev.2 107 /