Oki C9200 Service Manual page 115

5 Fuser Unit Error
• Does the fuser error occur immediately after the printer is turned on?
• 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 )
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 )
Yes Replace the fuser unit.
• No
• No Does the fuser error occur about 3 min. after the printer is turned on?
• No Go to A
• Yes Is the fuser's heater on? (Does it get hot?)
• Yes Replace the engine board.
• No Replace the fuser unit.
• No Does AC voltage appear between CN1 connector Pin 1 and Pin3 of the low-voltage power
supply unit?
No Replace the low-voltage power supply unit.
• Yes Replace the fuser unit.
41388601TH Rev.2
.
Halogen Lamp
Back-up Roller Thermistor
Heat Roller Thermistor
Bottom part of Fuser Unit
Figure 6.1
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