Toshiba E-STUDIO2008A - Page 711

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ERROR CODE AND TROUBLESHOOTING
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[C449] The fusing temperature is above 240 degrees C
Check item Measure
1. Check the thermistors 1. Check if the connectors of the center, side or edge
thermistors are disconnected.
2. Check if the center, side and edge thermistors contact the
surface of the fuser roller properly.
3. Check if the center, side and edge thermistors are deformed
or dirty.
4. 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. (Check that the heater is
conducted properly.)
2. Check if the connector of the heater is disconnected.
3. Check if the harnesses are connected properly to the
terminals of the heater lamp.
4. Check if the thermostat is blown.
3. Check the LGC board 1. Check if the connector CN309 is disconnected.
2. Check if the conductor pattern on the LGC board is open or
short circuited.
3. Replace the LGC board.
4. Check the power supply Replace the switching regulator.
5. Clear the status counter 1. Change the value of the status counter (08-2002) to "0".
("7" or "8" is written in 08-2002.)
Parts to be replaced Remark
LGC board
Thermistors
Heater lamp
Classification Error content
Fuser unit related service call The fusing temperature is above 240 degrees C.
Check item Measure
1. Check the thermistors 1. Check if the connectors of the center, side or edge
thermistors are disconnected.
2. Check if the center, side and edge thermistors contact the
surface of the fuser roller properly.
3. Check if the center, side and edge thermistors are deformed
or dirty.
4. 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. (Check that the heater is
conducted properly.)
2. Check if the connector of the heater is disconnected.
3. Check if the harnesses are connected properly to the
terminals of the heater lamp.
4. Check if the thermostat is blown.
3. Check the LGC board 1. Check if the connector CN309 is disconnected.
2. Check if the conductor pattern on the LGC board is open or
short circuited.
3. Replace the LGC board.
4. Check the power supply Replace the switching regulator.