3MH
1-4-4
(4)
A paper jam in the
paper feed section is
indicated during
copying (misfeed in
vertical paper con-
veying section 1).
Jam code 15
Broken registration switch,
cassette feed switch 1 or 2
actuator.
Check visually and replace switch.
Defective switch.
Run maintenance item U031 and turn switch on and off manually.
Replace the switch if indication of the corresponding switch is not
light.
Registration switch, cassette feed switch 1, 2
Check if the paper feed
clutch, cassette paper feed
clutch 1, 2 or 3 malfunc-
tions.
Run maintenance item U032 and select the clutch to be turned on
and off. Check the status and remedy if necessary.
Electrical problem with the
paper feed clutch, cassette
paper feed clutch 1, 2 or 3.
Check (see page 1-4-9).
Defective feed pulleys or
feed rollers.
Check visually and replace.
(5)
A paper jam in the
paper feed section is
indicated during
copying (misfeed in
vertical paper con-
veying section 2).
Jam code 16
Broken cassette feed
switch 1 or 2 actuator.
Check visually and replace switch.
Defective switch.
Run maintenance item U031 and turn switch on and off manually.
Replace the switch if indication of the corresponding switch is not
light.
Cassette feed switch 1, 2
Check if the paper feed
clutch, cassette paper feed
clutch 1 or 2 malfunctions.
Run maintenance item U032 and select the clutch to be turned on
and off. Check the status and remedy if necessary.
Electrical problem with the
paper feed clutch, cassette
paper feed clutch 1 or 2.
Check (see page 1-4-9).
Defective feed pulleys or
feed rollers.
Check visually and replace.
(6)
A paper jam in the
paper feed section is
indicated during
copying (multiple
sheets in first paper
feeder).
Jam code 22
Deformed guides along the
paper conveying path.
Check visually and replace.
Broken registration switch
actuator.
Check visually and replace switch.
Defective registration
switch.
Run maintenance item U031 and turn registration switch on and
off manually. Replace the switch if indication of the corresponding
switch is not light.
Check if the cassette paper
feed clutch 1 malfunctions.
Run maintenance item U032 and select the cassette paper feed
clutch 1 to be turned on and off. Check the status and remedy if
necessary.
Electrical problem with the
cassette paper feed clutch
1.
Check (see page 1-4-9).
Check if the right and left
registration rollers contact
each other.
Check visually and replace.
Problem
Causes/check procedures
Corrective measures
Содержание DF-420
Страница 1: ...SERVICE MANUAL Published in May 2009 3MZSM060 First Edition DP 420 PF 420 DF 420 JS 420 FAX System R ...
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Страница 11: ...First Edition DP 420 ...
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Страница 84: ...3MH 2 4 Appendixes List of maintenance parts 2 4 1 Periodic maintenance procedures 2 4 1 Wiring diagram 2 4 2 ...
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Страница 291: ...3MZ 2 2 4 2 2 2 NCU PWB Figure 2 2 2 NCU PWB silk screen diagram MCN1 MCN2 MCN3 4 3 4 3 4 3 CN2 CN1 1 2 21 22 2 1 ...
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