e-STUDIO520/600/720/850 TROUBLESHOOTING March 2005 © TOSHIBA TEC
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[CE50] Temperature/humidity sensor abnormality
[CE90] Drum thermistor abnormality
[CF70] New toner transport motor abnormality
(1) Check if the transport auger and paddle are not locked (no extraneous material or toner clod in
both the toner transport sections at the cleaner unit).
(2) Is the new toner transport motor disconnected?
(3) Check if the connector of the LGC board and connector Pins are not disconnected.
(4) Replace the new toner transport motor.
(5) Replace the LGC board.
[CF80] Hopper motor lockup
(1) Check if the recycle toner transport motor is not locked (no extraneous material or toner clod in
both the toner transport sections at the recycle toner unit).
(2) Is the disconnected?
(3) Check if the connector of the LGC board and connector Pins are not disconnected.
(4) Replace the hopper motor.
(5) Replace the LGC board.
Is the connector CN338 on the LGC board or the connector of the temperature/humidity
sensor (S7) disconnected?
Is the harness between the LGC board and the temperature/humidity sensor disconnected?
!
YES " Connect the connector securely. Replace the harness.
NO
1) Check the connection of the KEY1 board and DSP board.
2) Check the connection of the DSP board and LGC board.
3) Replace the temperature/humidity sensor.
4) Replace the LGC board.
Is the connector CN337 on the LGC board, or the connector of the drum thermistor discon-
nected?
Is the harness between the LGC board and the drum thermistor (THM5) disconnected?
!
YES " Connect the connector securely. Replace the harness.
NO
1) Replace the drum thermistor.
2) Replace the LGC board.
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