Oce 3121, Technical & Service Manual

Page: 139 / 908

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ed.2 Trouble shooting 31
30 E521
31 E530
Cause Step Checks Y/N Action
1 Switch on the joint sensor. Set the
DIP switch SW3, on the tray control
PBA, as follows:
Does the tray motor M7 rotate in
response to each press on the man-
ual staple button?
No Replace the tray motor
M7.
Connector
J12: poor
contact 2 Check the connection of J12 to the
tray control PBA. No Improve the connection.
Sensor for the
tray position
PI12 3 Set the meter to the DC range. Con-
nect the + to J12-7 and the – to
J12-8 on the tray control PBA. Is
the voltage approximately 0 V
when the tray is at the front, and 5
V when the tray is at the rear? Yes Check the wiring to the
tray position sensor PI12.
If undamaged, replace
the sensor.
Tray control
PBA No Replace the tray control
PBA.
Cause Step Checks Y/N Action
Obstruction 1 Is something obstructing the guide
bar? Yes Remove the obstruc-
tion.
Connector
(poor contact) 2 Check the connection of J4 to the
tray control PBA. No Improve the connec-
tion.
Guide bar:
home position
sensor PI5 3 Set the meter to the DC range. Con-
nect the + to J4-5 and the – to J4-7
on the tray control PBA. Is the volt-
age approximately 5 V? Yes Check the wiring to the
home position sensor
PI5. If undamaged,
replace the sensor.
Motor M4 for
the swing
guide 4 Replace the motor M4. Is the prob-
lem solved? Yes End.
Tray control
PBA No Replace the tray con-
trol PBA.