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Chapter 1 Troubleshooting
FIP4.8 SENSOR NO PAPER
Step Check
Yes
No
Possible causes:
SENSOR NO PAPER (PL20.2.33)
ACTUATOR NO PAPER (PL20.2.6)
HARNESS ASSY CLSNR1 (PL20.2.31)
HARNESS ASSY CLSNR2 (PL20.1.36)
550 PAPER CASSETTE (PL20.3.50)
Option 550 Paper Feeder PWBA FEEDER 550
(PL20.1.34) HVPS/MCU (PL12.1.19)
1
Checking ACTUATOR NO PAPER
Remove Option 550 Paper Feeder. (RRP20.1)
Install 550 PAPER CASSETTE.
Move ACTUATOR NO PAPER with a finger.
Does ACTUATOR NO PAPER operate smoothly?
Does the flag go into the detecting area of the sensor
when the paper is set, and out of the detecting area
when there is no paper?
With tool Go to
step 2. Without
tool Go to step 3.
Replace ACTUA-
TOR NO PAPER.
2
Checking SENSOR NO PAPER (1)
Install Option 550 Paper Feeder. (RRP20.1)
Remove EP CARTRIDGE.
Close COVER OPEN (PL1.1.2).
Remove 550 PAPER CASSETTE.
Put the hand in the cassette insertion space, move
ACTUATOR NO PAPER.
Does the number increase one by one, as ACTUATOR
NO PAPER operates?
Check using Chapter 2 Diagnostic [Sensor/Switch
Check].
Replace HVPS/
MCU.
(RRP12.10)
Go to step 3.
3
Checking SENSOR NO PAPER (2)
Install Option 550 Paper Feeder. (RRP20.1)
Remove EP CARTRIDGE.
Close COVER OPEN (PL1.1.2).
Remove 550 PAPER CASSETTE.
Put the hand in the cassette insertion space, move
ACTUATOR NO PAPER.
Is the voltage across P/J85-7(+) and P/J85-6(-), 0 VDC
when ACTUATOR NO PAPER is held up, and 3.3 VDC
when released?
Go to FIP4.6, 4.7
PWBA FEEDER
550.
Go to step 4.
4
Checking HARNESS ASSY CLSNR1 for continuity
Remove HARNESS ASSY LSNR1.
Is there continuity between
J855-5 and J852-3?
J855-6 and J852-2?
J855-7 and J852-1?
Go to step 5.
Replace HAR-
NESS ASSY
CLSNR1.
5
Checking HARNESS ASSY CLSNR2 for continuity
Disconnect connector P/J85 from PWBA FEEDER 550.
Is there continuity between
J85-5 and J855-3?
J85-6 and J855-2?
J85-7 and J855-1?
Go to step 6.
Replace HAR-
NESS ASSY
CLSNR2.
