Canon LASER CLASS 710 - Page 124

LASER CLASS 730i/720i/710 Chapter 4: Maintenance and Service
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(7) Replace the ECU board.
(8) Replace the SCNT board.
MP tray paper sensor fails to operate properly.
(1) Check whether the actuator of MP tray paper sensor is in correct position.
(2) Check the connection between the MP tray paper sensor and the ECU board (J908).
(3) Check the connection between the ECU board (J912) and the SCNT board (J35).
(4) Replace the MP tray paper sensor.
(5) Replace the ECU board.
(6) Replace the SCNT board.
Tray full sensor fails to operate properly.
(1) Check whether the actuator of Tray full sensor is in correct position.
(2) Check the connection between the Tray full sensor and the ECU board (J915).
(3) Check the connection between the ECU board (J915) and the SCNT board (J6).
(4) Replace the Tray full sensor.
(5) Replace the ECU board.
(6) Replace the SCNT board.
Face-up sensor fails to operate properly.
(1) Check whether the actuator of Face-up sensor is in correct position.
(2) Check the connection between the ECU board (J901) and the EPU board (J401).
(3) Check the connection between the ECU board (J912) and the SCNT board (J35).
(4) Replace the EPU board.
(5) Replace the ECU board.
(6) Replace the SCNT board.
Printer cover sensor fails to operate properly.
(1) Check whether the switch of Printer cover sensor is in correct position.
(2) Check the connection between the Printer cover sensor and the ECU board (J906).
(3) Check the connection between the ECU board (J912) and the SCNT board (J35).
(4) Replace the Printer cover sensor.
(5) Replace the ECU board.
(6) Replace the SCNT board.
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