Toshiba e-STUDIO6520C Service Handbook page 462

[C451] Thermopile and edge thermistor temperature difference
1. Check if any paper is clinging to the fuser belt.
2. Check if there is any foreign matter between the fuser belt thermopile (center/side) and the fuser
belt. Remove it if any.
3. Replace the fuser belt thermopile (center/side)
[C463] Pressure roller thermistor and edge thermistor temperature difference
1. Check if any paper is clinging to the pressure roller.
2. Check if there is any foreign matter between the pressure roller thermistor (center/side) and the
pressure roller. Remove it if any.
3. Replace the pressure roller center thermistor (center/side)
[C461] Pressure roller temperature detection (40 degrees C) abnormality (not determined)
[C462] Pressure roller temperature detection (40 degrees C) abnormality (determined)
[C464] Pressure roller thermistor temperature difference abnormality
1.Check the power voltage
(1) Check if the power voltage is normal.(Is the voltage during the operation ±10% of the rated
voltage?)
2.Check the error detection history
(1) Check the error detection history of each temperature detecting element when the error
occurred. If any of the elements detects an abnormal temperature, check step 3.
08-1902: Fuser belt center thermopile temperature
08-1903: Fuser belt side thermopile temperature
08-1904: Fuser belt edge thermistor temperature
08-1905: Pressure roller center thermistor temperature
08-4545: Pressure roller rear thermistor temperature
3.Check the pressure roller thermistor.
(1) Check if the connector is disconnected.
(2) Is the pressure roller center thermistor installed properly?
(3) Is the pressure roller rear thermistor contacted with the pressure roller surface securely?
(4) Is any of the harnesses for the pressure roller center thermistor and the pressure roller rear
thermistor open circuited?
4. Check the switching regulator and fuser unit
(1) Is the fuser unit installed correctly?
(2) Is a harness for the heater lamp open circuited? (Is power supplied to the heater lamp?)
(3) Is the connector of the heater lamp disconnected?
(4) Check if the thermostat is blown.
(5) Is the connector of the switching regulator disconnected? (Check the AC output connector
CN409 of the switching regulator and the I/F connector CN403 of the LGC board.)
(6) Is the switching regulator damaged?
(7) Replace the switching regulator.
5. Check the LGC board
(1) Are the connectors CN301 and CN306 disconnected?.
(2) Is the conductor pattern on the board short circuited or open circuited?
(3) Replace the LGC board.
e-STUDIO5520C/6520C/6530C
ERROR CODE and TROUBLESHOOTING
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