Toshiba e-studio166 Service Handbook page 177

[C44] Fuser is abnormal after abnormality judgment
1. Check the thermistors
(1) Check if the connectors are disconnected.
(2) Check if the center, side and edge thermistors are in contact with the surface of the fuser roller
properly.
(3) Check if the harnesses of the center, side and edge thermistors are open circuited.
2. Check the heater
(1) Check if the heater is broken.
(2) Check if the connector of the heater is disconnected.
(3) Check if the thermostat is blown.
3. Check the MAIN board
(1) Check if the connectors CN17 are disconnected.
(2) Check if the conductor pattern on the MAIN board is short circuited or open circuited.
(3) Replace the MAIN board.
4. Clear the status counter
Change the current status counter value (08-400) "5", "7" or "9" to "0" for [C44], taking the same proce-
dure as that for [C41].
* The status counter value is as follows in the following cases. Change them to "0" respectively.
• The error occurred during warming-up: "5"
• The error occurred after the equipment has become ready: "7"
• The temperature detected by the center thermistor is 230°C or higher: "9"
• The temperature detected by the side thermistor is 230°C or higher: "9"
• The temperature detected by the edge thermistor is 230°C or higher: "9" only during printing.
[C45] Thermistor abnormality during printing
1. Check the edge thermistor
(1) Check if the connector is disconnected.
(2) Check if the edge thermistor is in contact with the surface of the fuser roller properly.
(3) Check if the harness of the edge thermistor is open circuited.
2. Check the MAIN board
(1) Check if the connector CN17 is disconnected.
(2) Check if the conductor pattern on the board is short circuited or open circuited.
(3) Replace the MAIN board.
3. Clear the status counter
Change the current status counter value (08-400) "6" to "0".
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