Fuser Related Service Call - Sharp AR-650 Service Handbook

4.3 Fuser Related Service Call

[C41] Thermistor abnormal or heater disconnection at power ON
Note) Before carrying out checks (1) and (2) below, first disconnect the power cord to prevent the
danger of electric shock.
(1) Check the thermistor.
• Are the connectors disconnected?
• Are the main and sub (end section) thermistors firmly contacting the heat roller?
• Are the harness of the main and sub (end section) thermistors broken?
(2) Check the heater lamp and SSR.
• Is the heater lamp open-circuited?
• Is the heater lamp connector disconnected?
• Is the thermostat blown?
• Is the SSR connector disconnected?
• Are the SSR and switching power supplies damaged?
(3) Check the LGC board.
• Is connector J326 disconnected?
• Check the circuits for open-or, short-circuits, or other troubles.
• Replace the LGC board.
(4) Reset the status counter.
Carry out the following after you have repaired the location where error [C41] occurred:
• Turn the power ON while pressing the [0] and [8] keys simultaneously.
• Enter "400" from the number key pad, and press the START key.
• Overwrite currently displayed status counter 1 or 2 to 0, and press the [SET] or [INTERRUPT]
key to exit error [C41].
• Turn the power OFF then back ON, and check the machine enters a normal standby state.
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