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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-980k. in room temperature of 0-43 degrees Celsius.)

• Yes Replace the fuser unit.

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• No Is the back-up roller thermister disconnected or generating a short circuit? (See Fig. 5-1)

(Approx. 190k-980k. in room temperature of 0-43 degrees Celsius.)

• Yes Replace the fuser unit.

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• No

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• No Does a fuser unit error occur approx. three minutes after power ON?

• No Proceed to (A).

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• Is the heater in the fuser unit turned ON? (Is it hot?)

• Yes Replace the engine board.

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• No Replace the fuser unit.

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• 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.

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• Yes Replace the fuser unit.

Figure 5.1

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Back-up roller thermister

Heat roller thermister

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Sharp AR-C240P Specifiche Pagina 128