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TROUBLESHOOTING
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[CC90] Upper stack tray lift motor abnormality
MJ-1022
Is the wiring between the finisher controller PC board and upper stack tray lift motor (M5) cor-
rect?
È NO Æ Correct the wiring.
YES
Are the front and rear sides of the upper stack tray leveled?
È NO Æ Level them.
YES
Is the upper stack tray lift motor clock sensor (S19) working properly?
È NO Æ Level them.
YES
Is the stack tray paper height sensor (S10) working properly?
È NO Æ Replace the sensor.
YES
Are the upper stack tray upper limit sensor (S25), upper stack tray full sensor (S23) and stack
processing safety switch (S26) working properly?
È NO Æ Replace the sensor or sensor controller PC board.
YES
Does the voltage between the pins J14-1 and -2 on the finisher controller PC board become
24V when the upper stack tray lift motor starts rotating?
È NO Æ Replace the finisher controller PC board.
YES
Check the wiring between the upper stack tray lift motor and finisher controller PC board. If
there is no problem, replace the upper stack tray lift motor.
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