Toshiba E-STUDIO3508A - Page 713

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ERROR CODE AND TROUBLESHOOTING
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[C4B0] Fusing error counter for out-of-specifications
[C4C0] Fuser unit new/old detection fuse abnormality
Check item Measure
1. Check the edge 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 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.
3. Clear the status counter 1. Change the value of the status counter (08-2002) to "0".
("62" is written in 08-2002.)
Parts to be replaced Remark
LGC board
Thermistors
Classification Error content
Fuser unit related service call Fusing error counter for out-of-specifications
Check item Measure
1. Check the LGC board 1. Check if the conductor pattern on the LGC board is open or
short circuited.
2. Check if the memory (IC41) is installed properly.
3. Replace the LGC board.
2. Clear the status counter 1. Change the value of the status counter (08-2002) to "0".
Parts to be replaced Remark
LGC board
Classification Error content
Fuser unit related service call Fuser unit new/old detection fuse abnormality
Check item Measure
1. Check the fuser unit. 1. Are the connectors disconnected?
2. Are the harnesses open circuited?
3. Replace the fuser unit.
2. Check the PC board 1. Are the connectors disconnected?
2. Are the harnesses short circuited or open circuited?
3. Replace the board.
Parts to be replaced Remark
Fuser unit.
PC board