LASER CLASS 730i/720i/710 Chapter 4: Maintenance and Service
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The paper skews.
(1) Check to make sure that the cassette has been fully fitted all the way into the machine.
(2) Check whether the recommended paper is used.
(3) Check whether more than 100 sheets of paper have been loaded in the multi-purpose
tray.
(4) Check whether more than 250 sheets of paper have been loaded in the cassette.
(5) Check whether the paper has been loaded into the multi-purpose tray correctly.
(6) Check whether the paper has been loaded into the cassette correctly.
(7) Check whether dust or paper debris have built up inside the cassette and
multi-purpose tray.
(8) Check whether the paper pickup roller, or any other rollers, are damaged or scratched.
• The printing operation is abnormal.
The unit indicates there is a paper jam when there is no paper jam.
(1) Check if the cassette recording paper sensor, multi-purpose tray paper sensor are
operating correctly using the methodes given in this chapter, 6.7 Faculty Tests,
Test mode [6] Faculty test, [3] Sensor tests.
(2) Check the multi-purpose tray paper sensor, the sensor cable and the ECU board
connections.
(3) Check the cassette recording paper sensor, the sensor cable and the EPU board
(J305) connections.
(4) Check the top of page sensor, the sensor cable and the EPU board (J305) connections.
(5) Check the paper eject sensor, the sensor cable and the EPU board (J301) connections.
(6) Check the main motor, main motor connector and the ECU board (J903).
(7) Replace the multi-purpose tray paper sensor.
(8) Replace the cassette recording paper sensor.
(9) Replace the top of page sensor.
(10) Replace the paper eject sensor.
(11) Replace the main motor.
(12) Replace the EPU board.
(13) Replace the ECU board.
(14) Replace the SCNT board.
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