Oki MB461MFP, Maintenance Manual

Page: 246 / 302

Oki Data CONFIDENTIAL
44871001TH Rev.6
8-54
8. TROUBLESHOOTING PROCEDURES
8.5.5. (3) Paper feed jam (Error code 391: 1st tray)
(3-1) Does a jam error occur when turning on the power?
Check item Check operation Actions for NG
results
(3-1-1) Check condition of paper running path
Paper running path
of the front unit Open the front cover check if paper is not
jammed in the paper running path. Remove the
paper
(3-1-2) Check condition of the mechanical parts
Entrance sensor Does the entrance sensor lever work normally?
(It moves freely by touching.) Replace the
entrance sensor
lever.
Clean a sensor. replace the main
board.
(3-2) Jam occurs immediately after the paper feed is started. (1st tray)
Check item Check operation Actions for NG
results
(3-2-1) Check condition of paper running path
Paper running path
of the front unit Open the front cover check if paper is not
jammed in the paper running path. Remove the
paper
(3-2-2) Check condition of the mechanical parts
Entrance sensor Is the paper sent to the entrance sensor lever? Replace the
paper feed roller,
pick-up roller or
paper cassette.
Does the entrance sensor lever work normally?
(It moves freely by touching.) Replace the
entrance sensor
lever.
Is the IN_WR connector of the main board
connected properly? Connect the
IN_WR connector
properly.
Check item Check operation Actions for NG
results
(3-2-3) Check the paper feed roller rotate.
Casette Does the paper feed roller rotate? YES:
Set the paper
cassette
appropriately.
NO:
Go next question.
Paper feed roller
and shaft. Does the paper feed clutch work normally? YES:
Replace the
paper feed roller
and shaft.
NO:
Go next question.
Connector Is HCLT connector of the main board
appropriately connected? YES:
Go next question.
NO:
Connect HCLT
connector
appropriately.
Clutch Is the coil resistance of the paper feed clutch
(Normal resistance: Pin1, Pin2, and approx.
192 ) normally? YES:
Replace the main
board.
NO:
Replace the
paper feed
clutch.