3MJ
1-4-2
(3) Paper misfeeds
Problem
Causes/check procedures
Corrective measures
(1)
A paper jam in built-
in finisher is indicated
as soon as the main
power switch is
turned on.
A piece of paper torn from
copy paper is caught
around the paper conveying
switch.
Check visually and remove it, if any.
Defective paper conveying
switch.
With 5 V DC present at YC2-23 on the finisher control PWB,
check if YC2-21 on the finisher control PWB remains low when
the paper conveying switch is turned on and off. If it does, replace
the paper conveying switch.
(2)
A paper jam in fin-
isher is indicated dur-
ing copying (jam
between the finisher
and machine).
Jam code 80
Extremely curled paper.
Change the paper.
Defective paper conveying
switch.
With 5 V DC present at YC2-23 on the finisher control PWB,
check if YC2-21 on the finisher control PWB remains low or high
when the paper conveying switch is turned on and off. If it does,
replace the paper conveying switch.
(3)
A paper jam in fin-
isher is indicated dur-
ing copying (finisher
paper entry nonar-
rival jam).
Jam code 81
Extremely curled paper.
Change the paper.
Defective paper conveying
switch.
With 5 V DC present at YC2-23 on the finisher control PWB,
check if YC2-21 on the finisher control PWB remains low or high
when the paper conveying switch is turned on and off. If it does,
replace the paper conveying switch.
(4)
A paper jam in fin-
isher is indicated dur-
ing copying (finisher
paper entry jam).
Jam code 83
Defective paper conveying
switch.
With 5 V DC present at YC2-23 on the finisher control PWB,
check if YC2-21 on the finisher control PWB remains low or high
when the paper conveying switch is turned on and off. If it does,
replace the paper conveying switch.
Check if the feedshift roller
or feedshift pulley is
deformed.
Check visually and replace.
(5)
A paper jam in fin-
isher is indicated dur-
ing copying (finisher
eject jam).
Jam code 84
Defective paper conveying
switch.
With 5 V DC present at YC2-23 on the finisher control PWB,
check if YC2-21 on the finisher control PWB remains low or high
when the paper conveying switch is turned on and off. If it does,
replace the paper conveying switch.
Check if the feedshift roller
or feedshift pulley is
deformed.
Check visually and replace.
Check if the eject roller or
eject pulley is deformed.
Check visually and replace.
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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