Toshiba DP4500 Service Handbook page 155

[C48] IGBT high temperature
1. Check the operation of the IH control board cooling fan
Check if the IH control board cooling fan is rotating normally. (Is the connector securely connected?)
2. Check the IH control board
(1) Check if the IGBT or IGBT radiation plate are normal. (Is the radiation plate securely attached?)
(2) Check if the conductor pattern on the board is short- or open-circuited.
(3) Replace the IH control board.
3. Clear the status counter
Change the values "12", "14", "15" or "18" 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 before the temperature of the fuser roller reaches 40°C: "12"
• The error occurred before the temperature of the fuser roller reaches 150°C: "15"
• The error occurred before the machine has become ready: "14"
• The error occurred when the machine is in the ready state: "18"
[C49] IH circuit or coil is abnormal
1. Check the IH control board
(1) Check if the conductor pattern on the board is short or open-circuited.
(2) Replace the IH control board.
2. Check the IH coil
(1) Check if the coil is broken or shorted.
(2) Replace the IH coil.
3. Clear the status counter
Change the values "13", "15", "16" or "19" 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 before the temperature of the fuser roller reaches 40°C: "13"
• The error occurred before the temperature of the fuser roller reaches 150°C: "16"
• The error occurred before the machine has become ready: "15"
• The error occurred when the machine is in the ready state: "19"
[C47], [C48] and [C49] can be cleared by turning OFF and ON the main switch as long as the problem was
solved, and the status counter does not have to be changed to "0".
The value of the status counter remains until the next service call overwrites the value.
DP4500/3500 TROUBLESHOOTING 5 - 60 December 2000 © TOSHIBA TEC