Fuser Unit Error - Oki C9500 Maintenance Manual

5 Fuser unit error

• Do fuser errors occur right after power ON?
(A)
• Yes Is the heat roller thermister disconnected or generating a short circuit? (See Fig. 5-1)
(Approx. 190k-980kΩ in room temperature of 0-43 degrees Celsius.)
• Yes Replace the fuser unit.
• No Is the back-up roller thermister disconnected or generating a short circuit? (See Fig. 5-1)
(Approx. 190k-980kΩ in room temperature of 0-43 degrees Celsius.)
• Yes Replace the fuser unit.
• No
• No Does a fuser unit error occur approx. three minutes after power ON?
• No Proceed to (A).
• Is the heater in the fuser unit turned ON? (Is it hot?)
• Yes Replace the engine board.
• No Replace the fuser unit.
• No Is AC voltage output between CN1 connector pin 1 and pin 3 in the low-voltage power unit?
• No Replace the low-voltage power unit.
• Yes Replace the fuser unit.
41956001TH Rev.6
Heat roller thermister
Figure 5.1
Oki Data CONFIDENTIAL
Back-up roller thermister
120 /