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M-11
"54 MOTOR MALF" is displayed (The main motor rotation disabled)
Possible cause
Step
Low-voltage power
1
supply PCB
LV harness
Main PCB
DC motor harness
2
DC motor assy.
M-12
No paper pick-up from cassette (or MP tray)
Possible cause
Step
Mis-operation
1
Main PCB
2
Feed flat cable
3
Paper feeder
4
PCB
Pick-up(or MP
5
Pick) solenoid
Paper feed motor
6
Check
Is the voltage of P7-1 in the main PCB
connector +24V?
Does the voltage of P7-4 in the main PCB
connector drop from 5V to 0V after dropping
the voltage of P7-3 from 5V to 0V?
Check
Is the paper feed mode set correctly?
Does the voltage of P3-20 (or 19) in the main
PCB connector rise from 0V to 5V and is a
pulses having about 11ms period generated
at P3-6, 7, 8 ,9 pin?
Does the voltage of P5-20 (or 19) in the paper
feeder PCB. Connector rise from 0V to 5V
and is the pulses having about 11ms period
generated at P3-6, 7, 8 ,9 pin?
Does the voltage of P3-1 (or P4-1) in the
paper feeder PCB connector drop from
24V to 0V and is the chopping pulses
generated at P1-1, 2, 5 ,6 pin?
Does the pick-up (or MP Pick) solenoid
operate?
Does the pick-up motor rotate?
Result
No
No
Yes
Result
No
No
No
No
No
No
VI - 15
Remedy
Replace the main PCB assy
low-voltage power supply PCB
assy, or the LV harness.
Replace the main PCB assy.
Replace the DC motor harness
or the DC motor assy.
Remedy
Set paper feed mode
correctly.
Replace the main PCB assy.
Replace the feed flat cable.
Replace the Paper feed/size-
SW PCB assy.
Replace the pick-up (or MP
Pick) solenoid.
Replace the paper feed motor assy.
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Chapters
Troubleshooting
