Sony C9000 service manual 115

5Fuser Unit Error

•Does the fuser error occur immediately after the printer is turned on?

	A
•	Yes	Does the heat roller thermistor have a open or short circuit? (See Figure 6.1.)
		(at room temperature 0 ° C~ 43 ° C, approx. 190 ~ 980 Ω	)
		Yes Replace the fuser unit.
▼	No	Does the back-up roller thermistor have a open or short circuit? (See Figure 6.1.)
•
		(at room temperature 0 ° C~ 43 ° C, approx. 190 ~ 980 Ω	)
		Yes Replace the fuser unit.

▼	▼
	•	No
▼
• No
	•	No

Does the fuser error occur about 3 min. after the printer is turned on? Go to A .

▼	Is the fuser’s heater on? (Does it get hot?)
• Yes
• Yes	Replace the engine board.

▼

• No

▼

• No

No

▼

• Yes

Replace the fuser unit.

Does AC voltage appear between CN1 connector Pin 1 and Pin3 of the low-voltage power supply unit?

Replace the low-voltage power supply unit.

Replace the fuser unit.

Halogen Lamp

Back-up Roller Thermistor Heat Roller Thermistor

Bottom part of Fuser Unit

Figure 6.1

41388601TH Rev.2 115 /