2KR/2KS
1-4-22
(41)
A paper jam in fin-
isher is indicated dur-
ing copying (main
tray eject jam).
Jam code 88
Defective eject switch 1.
Run maintenance item U241 and turn eject switch 1 on and off
manually. Replace the switch if indication of the corresponding
switch on the touch panel is not displayed in reverse.
(42)
A paper jam in fin-
isher is indicated dur-
ing copying (center-
folding unit jam).
Jam code 89
Defective sensor/switch.
Run maintenance item U241 and turn the following switch on and
off manually. Replace the switch if indication of the corresponding
switch on the touch panel is not displayed in reverse.
Centerfold paper entry sensor, centerfold eject switch, centerfold
paper conveying sensor
(43)
A paper jam in fin-
isher is indicated dur-
ing copying (mailbox
jam).
Jam code 90
Defective tray eject sensor.
Run maintenance item U241 and turn tray eject sensor on and off
manually. Replace the switch if indication of the corresponding
switch on the touch panel is not displayed in reverse.
(44)
A paper jam in fin-
isher is indicated dur-
ing copying
(switchback sensor
jam).
Jam code 93
Defective switchback sen-
sor.
With 5 V DC present at CN3-5 on the finisher main PWB, check if
CN3-7 on the finisher main PWB remains low or high when the
switchback sensor is turned on and off. If it does, replace the
switchback sensor.
Check if the switchback
motor malfunctions.
Check.
Check if the switchback
roller and switchback pul-
ley contact each other.
Check and remedy.
Check if the switchback
guide is deformed.
Check and remedy.
Defective finisher main
PWB.
Replace the finisher main PWB and check for correct operation.
(45)
A paper jam in fin-
isher is indicated dur-
ing copying (paper
entry sensor stay
jam).
Jam code 94
Extremely curled paper.
Change the paper.
Defective paper entry sen-
sor.
With 5 V DC present at CN3-1and CN3-3 on the finisher main
PWB, check if CN3-2 and CN3-4 on the main PCB remains low or
high when the paper entry sensor is turned on and off. If it does,
replace the paper entry sensor.
Check if the paper entry
guide is deformed.
Check and remedy.
Defective finisher main
PWB.
Replace the finisher main PWB and check for correct operation.
Problem
Causes/check procedures
Corrective measures
Summary of Contents for TASKalfa 420i
Page 1: ...SERVICE MANUAL Published in May 2010 842KS113 2KSSM063 Rev 3 TASKalfa 420i TASKalfa 520i ...
Page 4: ...This page is intentionally left blank ...
Page 10: ...This page is intentionally left blank ...
Page 14: ...2KR 2KS This page is intentionally left blank ...
Page 224: ...2KR 2KS 1 4 66 This page is intentionally left blank ...
Page 328: ...2KR 2KS 2 3 30 This page is intentionally left blank ...
Page 371: ...INSTALLATION GUIDE FOR PAPER FEEDER ...
Page 381: ...INSTALLATION GUIDE FOR 3000 SHEETS PAPER FEEDER ...
Page 436: ...INSTALLATION GUIDE FOR CENTER FOLDING UNIT ...
Page 450: ...INSTALLATION GUIDE FOR MAILBOX ...
Page 458: ...INSTALLATION GUIDE FOR HOLE PUNCH UNIT ...
Page 470: ...INSTALLATION GUIDE FOR BUILT IN FINISHER ...
Page 483: ...INSTALLATION GUIDE FOR JOB SEPARATOR ...
Page 491: ...INSTALLATION GUIDE FOR FAX System ...
Page 507: ......
Page 508: ......