E403; E411 - Oce 3121 Technical & Service Manual

25 E403

Cause
Feeding motor
clock sensor
(S9)
Feeding motor
(M2)

26 E411

Cause
Original tray
paper sensor (S1),
Registration sen-
sor (S3)
S1, S3
LED1, LED2 (for
sensor)
ed.2
Step Checks
1 Set the meter to the 20VDC
range, and connect the + probe
to J9-15 and the – probe to J9-16
on the RDF controller PBA.
Does the reading alternate
between 5 V and 0 V when the
clock disk is turned slowly by
hand?
2 Set the meter to the 200VDC
range, and connect the + probe
to J11-1 and the – probe to J11-2
on the RDF controller PBA.
Does the reading of the meter
change to 23 V when the Copy
Start key is pressed?
Step Checks
1 Connect the probes of the meter
to the connectors on the RDF
controller PC shown below. Is
the reading of the meter 2.3 V or
lower when nothing blocks the
sensor?
Original tray sensor S1:
(+) J5-7, (-) J5-8
Registration sensor S3:
(+) J9-20, (-) J9-21
2 Is the light-receiving face of
each sensor soiled with paper
lint?
3 Connect the probes of the meter
to the connectors of the RDF
controller PBA shown below. Is
the reading of the meter about
0.6 to 1.1 V?
LED1: (+) J9-1, (-) J9-2
LED2: (+) J9-3, (-) J9-4
Y/N Action
No Check the wiring from
the feeding motor clock
sensor (S9) to the RDF
controller PBA; if nor-
mal, replace the motor
clock sensor (S9).
Yes Check the wiring from
the feeding motor (M2)
to the RDF controller
PBA; if normal, replace
the feeding motor (M2).
No Replace the RDF control-
ler PBA.
Y/N Action
Yes Go to step 2.
No Replace the RDF control-
ler PBA.
Yes Clean the light-receiving
face of the sensor with a
cotton swab, and go to
step 3.
No Check the wiring from
the LED to the RDF con-
troller PBA; if normal,
replace the LED.
Trouble shooting 27