e-STUDIO5520C/6520C/6530C © 2008-2011 TOSHIBA TEC CORPORATION All rights reserved
ERROR CODE and TROUBLESHOOTING
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6.2.14 Fuser unit related service call
[C411/C412/C452] Thermistor/heater lamp abnormality at power-ON
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 thermopiles
(1) Check if the fuser belt center and side thermopiles (front, rear) are installed properly.
(2) Check if the harnesses of the fuser belt center and side thermopiles (front, rear) are open
circuited.
4. Check the IH board, IH coil and the fuser unit
(1) Is the fuser unit installed correctly?
(2) heck if foreign matter or paper in the fuser unit is plugging up the monitoring opening of the fuser
belt thermopile.
(3) Check if the opening of the fuser belt thermopile of the equipment is plugged up.
(4) Is the IH coil open circuited? (Check if power is supplied to the IH coil.)
(5) Check if the connector of the IH coil is disconnected.
(6) Check if the thermostat is broken.
(7) Check if any of the connectors (AC input connector and LGC I/F connector CN462) on the IH
board is disconnected.
(8) Is the IH board broken?.
• Replace the IH board.
5. Check the LGC board
(1) Check if the connectors CN333 and CN345 are disconnected.
(2) Check if the conductor pattern on the LGC board is short circuited or open circuited.
(3) Replace the LGC board.
Be sure to turn OFF the power and unplug the power cable beforehand when checking the power supply
unit and fuser unit.
The fuser unit itself or the part of the unit remains heated and the capacitors are still charged after a while
the power cable is unplugged. So make sure the unit is cooled down enough before checking.
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