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M-7
" CHECK XX TRAY " is displayed even if a paper-loaded cassette is mounted
(or even if a paper is set on MP tray) XX is MP/T1/T2
Possible cause
Step
Mis-operation
1
Actuator
2
Paper empty
3
sensor
Feed flat cable
Paper feed flat
4
cable
Main PCB
M-8
"14 NO CARTRIDGE " is displayed
Possible cause
Step
EP-ED cartridge
1
Is an EP-ED cartridge installed correctly?
Transfer unit
2
Is the electrode of the transfer unit dirty?
electrode
3
High-voltage
Is the voltage of P4-13 in the high-voltage
power supply
power supply PCB connector higher than that
PCB
of P4-11 over 2.5V?
HV harness
4
Is the voltage of P6-13 in the main PCB
connector higher than that of P6-11 over 2.5V?
Main PCB
Check
Is the paper feed mode set correctly?
Does the actuator for the paper empty sensor
operate smoothly?
Does the voltage of P5-3 (or P5-14) in the
Paper feeder PCB connector rise from 0V to
5V when the paper empty sensor is covered?
Does the voltage of P3-3 (or P3-14) in the main
PCB connector rise from 0V to 5V when the
paper empty sensor is covered?
Check
Result
No
No
No
No
Yes
Result
No
Yes
Yes
Yes
No
VI - 13
Remedy
Set paper feed mode
correctly.
Reassemble or replace the
actuator.
Replace the paper feed/size-
sw PCB assy or feed flat
cable .
Replace the feed flat cable.
Replace the main PCB assy.
Remedy
Install the EP-ED cartridge
correctly.
Clean the electrode of the
transfer unit.
Replace the high-voltage
power supply PCB assy.
Replace the HV harness.
Replace the main PCB assy.
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Chapters
Troubleshooting
