Sony C9000 service manual 108

2-1 Paper Input Jam (1st Tray)

•Does the jam occur soon after the printer is turned on?

•	Yes	Is the paper jammed at the entrance cassette sensor or the entrance MT sensor ?
			* MT : Multipurpose Tray
		Yes Remove the jammed paper.
		A
▼	No	Do the sensor levers (of the entrance cassette sensor and the entrance MT sensor) operate
•
		normally?
		No	Replace the defective sensor lever.
▼	Yes	Do the sensors (the entrance cassette sensor and the entrance MT sensor) work properly?
•
		(Operate each sensor lever and verify the signal on the FSENS connector pins on the PU
		board (K73 PWB).)
		Pin 4: Entrance cassette sensor, Pin 2: Entrance MT sensor
		No	Check the signal cable connection, or replace the sensor board (R71 PWB).

▼	Yes
•
▼
• No
•	Yes

Check the signal cable connection, or replace the engine board (K73 PWB).

Does the paper jam occur immediately after the paper is fed?

Does the paper reach the entrance cassette sensor or the entrance MT sensor? Yes Go to A .

	▼
	• No
▼	No
•
	Yes
▼	No
•
	No
▼	Yes
•
	No
▼	Yes
•

Replace the feed roller or the Retard Pad assy in the paper tray.

Is the feed motor rotating?

Replace the feed roller.

Is the resistance of the feed motor at the rated value (approx. 7.9 or 8.4 Ω )? Replace the feed motor.

Is +32V supplied to the POWER connector Pins 7~10 on the engine board? Replace the low-voltage power supply unit.

Check gear engagement and cable connection, or replace the engine board.

41388601TH Rev.2 108 /