3MX
1-4-3
(3) Paper misfeeds
Problem
Causes/check procedures
Corrective measures
(1)
An original jams in
DP is indicated dur-
ing copying (no origi-
nal feed).
Jam code 70
Defective original set
switch.
Run maintenance item U244 and turn the original set switch on
and off manually. Replace the switch if indication of the corre-
sponding switch is not light.
Check if the original feed
motor malfunctions.
Run maintenance item U243 and select the original feed motor to
be turned on and off. Check the status and remedy if necessary.
Check if the DP paper feed
pulley or DP separation pad
is deformed.
Check visually and replace.
(2)
An original jams in
DP is indicated dur-
ing copying (an origi-
nal jam in the original
conveying section 1).
Jam code 71
Defective DP timing switch.
Run maintenance item U244 and turn the DP timing switch on and
off manually. Replace the switch if indication of the corresponding
switch is not light.
Check if the original con-
veying motor malfunctions.
Run maintenance item U243 and select the original conveying
motor to be turned on and off. Check the status and remedy if nec-
essary.
(3)
An original jams in
DP is indicated dur-
ing copying (an origi-
nal size error jam).
Jam code 72
Defective DP timing switch.
Run maintenance item U244 and turn the DP timing switch on and
off manually. Replace the switch if indication of the corresponding
switch is not light.
Check if the original con-
veying motor malfunctions.
Run maintenance item U243 and select the original conveying
motor to be turned on and off. Check the status and remedy if nec-
essary.
(4)
An original jams in
DP is indicated dur-
ing copying (an origi-
nal jam in the original
conveying section 2).
Jam code 73
Defective DP timing switch.
Run maintenance item U244 and turn the DP timing switch on and
off manually. Replace the switch if indication of the corresponding
switch is not light.
Check if the original con-
veying motor malfunctions.
Run maintenance item U243 and select the original conveying
motor to be turned on and off. Check the status and remedy if nec-
essary.
(5)
An original jams in
DP is indicated dur-
ing copying (an origi-
nal jam in the original
conveying section 3).
Jam code 74
Defective DP timing switch.
Run maintenance item U244 and turn the DP timing switch on and
off manually. Replace the switch if indication of the corresponding
switch is not light.
Check if the original con-
veying motor malfunctions.
Run maintenance item U243 and select the original conveying
motor to be turned on and off. Check the status and remedy if nec-
essary.
(6)
An original jams in
DP is indicated dur-
ing copying (an origi-
nal jam in the original
switchback section).
Jam code 75
Defective DP timing switch.
Run maintenance item U244 and turn the DP timing switch on and
off manually. Replace the switch if indication of the corresponding
switch is not light.
Check if the original switch-
back motor malfunctions.
Run maintenance item U243 and select the original switchback
motor to be turned on and off. Check the status and remedy if nec-
essary.
Summary of Contents for DF-420
Page 3: ...Revision history Revision Date Replaced pages Remarks ...
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Page 11: ...First Edition DP 420 ...
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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 ...
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Page 149: ...First Edition DF 420 ...
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Page 159: ...3MJ 1 2 4 3 Remove the tape from the process table Figure 1 2 4 Tape Process table ...
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Page 196: ...3MK 1 1 2 1 1 2 Parts names Figure 1 1 1 1 2 1 Job separator tray 2 LED ...
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