Toshiba e-STUDIO556 Service Manual page 600

[C443/C445/C446/C447/C449] Heater abnormality after abnormality judgment
1,2.3. Check the thermistors, Heater and LGC board
Check the above components following the procedures 1, 2 and 3 for [C411/C412].
4. Clear the status counter
Change the current status counter value (08-2002) "3", "5" , "6" , "9" , "19" , "21" , "22" , "23" , "24" , "25"
, "27" or "29" to "0" for [C44X], taking the same procedure as that for [C41X].
• The status counter value is as follows in the following cases.
- The error occurred during warming-up: "3", "5" or "6"
- The error occurred after the equipment has become ready: "7"
- The temperature detected by the center thermistor is 240°C or higher, the temperature
detected by the side thermistor is 250°C or higher or the temperature detected by the edge
thermistor is 270°C or higher: "9", "19", "21", "22", "23", "25", "27" or "29".
- The error occurred during printing: "24" or "25"
- The error occurred during energy saving: "26" or "27"
- A paper jam occurred: "28" or "29"
[C465/C466/C467/C468] Pressure roller thermistor abnormality after entering ready status
1. Check the pressure roller thermistor
(1) Check if the connector is disconnected.
(2) Check if the pressure roller thermistor is in contact with the surface of the fuser roller properly.
(3) Check if the harness of the pressure roller thermistor is open circuited.
2. Check the LGC board
(1) Check if the connector CN332,CN334 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 (08-2002) "5", "6" , "7" , "8" , "18" , "20" , "24" , "26" or "28" to
"0"
[C471/472/473/474/475] IH power voltage abnormality or IH initial 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 copier is warming up))
2. Check the thermostat
Check if the thermostat is blown.
3. Check the IH control board
(1) Check if the AC input connector on the IH control board, the LGC I/F connectors CN455 is
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 CN332,CN334 and CN360 are disconnected.
(2) Check if the conductor pattern on the board is short- or open-circuited.
e-STUDIO556/656/756/856(Ver03)
ERROR CODE AND TROUBLESHOOTING
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