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.
Summary of Contents for DF-420
Page 3: ...Revision history Revision Date Replaced pages Remarks ...
Page 4: ...This page is intentionally left blank ...
Page 10: ...This page is intentionally left blank ...
Page 11: ...First Edition DP 420 ...
Page 17: ...3MX 1 1 4 This page is intentionally left blank ...
Page 21: ...3MX 1 2 4 This page is intentionally left blank ...
Page 65: ...3MX 1 5 10 This page is intentionally left blank ...
Page 69: ...3MX 2 1 4 This page is intentionally left blank ...
Page 82: ...First Edition PF 420 ...
Page 87: ...3MH 1 1 3 1 1 3 Machine cross section Figure 1 1 2 Machine cross section Paper path ...
Page 88: ...3MH 1 1 4 This page is intentionally left blank ...
Page 94: ...3MH 1 2 6 This page is intentionally left blank ...
Page 128: ...3MH 1 4 12 This page is intentionally left blank ...
Page 136: ...3MH 1 5 8 This page is intentionally left blank ...
Page 142: ...3MH 2 2 4 This page is intentionally left blank ...
Page 146: ...3MH 2 3 4 This page is intentionally left blank ...
Page 149: ...First Edition DF 420 ...
Page 151: ...3MJ This page is intentionally left blank ...
Page 155: ...3MJ 1 1 4 This page is intentionally left blank ...
Page 159: ...3MJ 1 2 4 3 Remove the tape from the process table Figure 1 2 4 Tape Process table ...
Page 175: ...3MJ 1 5 4 This page is intentionally left blank ...
Page 181: ...3MJ 2 1 6 This page is intentionally left blank ...
Page 185: ...3MJ 2 2 4 This page is intentionally left blank ...
Page 192: ...First Edition JS 420 ...
Page 194: ...3MK This page is intentionally left blank ...
Page 196: ...3MK 1 1 2 1 1 2 Parts names Figure 1 1 1 1 2 1 Job separator tray 2 LED ...
Page 197: ...3MK 1 1 3 1 1 3 Machine cross section Figure 1 1 2 Machine cross section Paper path ...
Page 198: ...3MK 1 1 4 This page is intentionally left blank ...
Page 212: ...3MK 2 2 2 This page is intentionally left blank ...
Page 215: ...First Edition FAX System R ...
Page 217: ...3MZ This page is intentionally left blank ...
Page 227: ...3MZ 1 2 4 This page is intentionally left blank ...
Page 285: ...3MZ 1 6 2 This page is intentionally left blank ...
Page 287: ...3MZ 2 1 2 This page is intentionally left blank ...
Page 293: ...3MZ 2 2 6 This page is intentionally left blank ...
Page 295: ...3MZ 2 3 2 This page is intentionally left blank ...
Page 296: ......