118 | Sony C9000

1Light or blurred images or images in inappropriate color tone on the whole printout area

(Figure 6.2- A )

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Is toner low? (Is the message "Toner Low" displayed?)

Yes	Supply toner.
No	Is the specified paper used?
No	Use the specified paper.
Yes	Is the lens of the LED head dirty?
Yes	Clean the LED head lens.
No	Is each LED head assy connected properly to the junction board (Y71 PWB) and engine
	board (K73 PWB)?
No	Check the cable connection (between each LED head and the engine board) and connect
	the cable between the LED head and the engine board properly.
Yes	Is +3.8V supplied to the following POWER connector pins on the junction board(Y71 PWB)?
	+3.8V: Pins 1, 2, 3, 4, 5, 6, 7 and 8
• Yes	Is +3.8V supplied to each LED head assy from the junction board (Y73 PWB)?
	YPOW connector Pin 3: LED head assy yellow
	MPOW connector Pin 3: LED head assy magenta
	CPOW connector Pin 3: LED head assy cyan
	BPOW connector Pin 3: LED head assy black

		No Replace the junction board (Y71 PWB).
	▼	Check the cable connection, or replace the LED head assy.
	• Yes	Check the cable connection, or replace the LED head assy.
▼	No	Check the cable connection, or replace the low-voltage power supply unit. Recovered?
•	No
	Yes	End
▼	No	Is +32V supplied to the POWER connector pins on the engine board (K73 PWB)?
•	No
		+32V: Pins 7, 8, 9 and 10
	No	Check cable connection, or replace the low-voltage power supply unit.
▼	Yes	Is +32V supplied to the HVOLT connector Pin 5 on the engine board (K73 PWB)?
•	Yes
	No	Replace the engine board.
▼	Yes	Check the cable connection, replace the high-voltage power unit, or belt cassette assembly.
•	Yes
		Recovered?
	Yes	End
▼	No	Is each ID terminal connected correctly to the contact assembly? (See Figure 6.3.)
•	No
	No	Connect the ID terminals with the contact assembly correctly.
▼	Yes	Replace the ID unit.
•	Yes	Replace the ID unit.

Notes: 1. When replacing the engine board (K73 PWB), demount the EEPROM chip from the old engine board and remount it on the new one.

2. In case the EEPROM chip is not replaced, see Item (2) in Sec. 6.5.2.