Toshiba e-STUDIO3511, Service Handbook, Page: 362 / 552

e-STUDIO3511/4511 TROUBLESHOOTING 5 - 48 November 2003 © TOSHIBA TEC
[C450] Thermistor abnormality during printing
1. Check the front edge thermistor
(1) Check if the connector is disconnected.
(2) Check if the front edge thermistor is in contact with the surface of the fuser belt properly.
(3) Check if the harness of the front edge thermistor is open circuited.
2. Check the LGC board
(1) Check if the connector CN358 is disconnected.
(2) Check if the conductor pattern on the board is short circuited or open circuited.
(3) Replace the LGC board.
3. Clear the status counter
Change the current status counter value (08-400) “6” to “0”.
[C470] IH initialization or IH power voltage abnormality
1. Check the AC input voltage
Check if the AC input voltage is within the specified range.
(especially when the heater becomes ON after the power is turned ON [the equipment is warming up])
2. Check the thermostats
Check if the thermostats are blown.
3. Check the IH control board
(1) Check if the AC input connectors CN450, 451 on the IH control board or the LGC I/F connectors
CN455, 456 are disconnected?
(2) Check if the fuse on the IH control board has blown.
(3) Replace the IH control board.
4. Check the LGC board
(1) Check if the connector CN358 is disconnected.
(2) Check if the conductor pattern on the board is short circuited or open circuited.
(3) Replace the LGC board.
5. Clear the status counter
Change the values “10”, “11”, “14” or “17” of the status counter (08-400) to “0”.
* The status counter value is as follows in the following cases. Change them to "0" respectively.
• The error occurred immediately after the power was turned ON: "10"
• The error occurred before the temperature of the fuser roller reaches 40°C: "11"
• The error occurred before the equipment has become ready: "14"
• The error occurred when the equipment is in the ready state: "17"