No Paper Sensor - Xerox Phaser 4500 Service Manual

No Paper Sensor

Phaser 4500/4510 Service Manual
Troubleshooting Reference
Applicable Parts
No paper sensor
No paper actuator
150-sheet feeder assembly
Tray 1 assembly harness
Tray 2 assembly harness
Chute assembly harness
HVPS/engine logic board
Bottom plate assembly
LVPS
550-sheet feeder assembly
Troubleshooting Procedure
Steps Actions and Questions
1 Check the no paper actuator for shape and
operation:
Does the no paper actuator operate
smoothly?
Is the flag between the sensor detecting
point when the no paper actuator is low
(there is no paper), and out of the
detecting point when the no paper
actuator is high (there is paper)?
Check the bottom plate assembly:
2
Insert the empty paper cassette.
Is the flag of the no paper actuator
between the sensor arms?
Check the no paper sensor:
3
1. Remove the paper cassette.
2. Reach into the paper cassette cavity and
manually actuate the no paper actuator.
3. Measure the voltages across
P/J24-8 <=> P/J24-7 and P/J24-3 <=> P/
J24-2 while moving the actuator.
Do the voltages measure 0VDC when the
no paper actuator is moved up, and 3.3
VDC when down?
4 Check the power to no paper sensor:
1. Remove the print cartridge.
2. Measure the voltages across P/J24-6 <=>
P/J24-7 and P/J24-1 <=> P/J24-2 on the
HVPS/engine logic board.
Do the voltages measure 3.3 VDC?
General Troubleshooting
Wiring and Plug/Jack Map References
"150-Sheet Feeder, 550-Sheet Feeder, Main
Fan" on page 10-27
"Print Engine Wiring Diagrams" on page 10-19
"Print Engine Plug/Jack Locator" on page 10-3
Yes
Go to step 2.
Go to step 3.
Replace the
HVPS/engine
logic board
(page 8-73).
Go to step 5.
No
Replace the
no paper
actuator
(steps 1-3
beginning on
page 8-18).
Replace the
paper
cassette.
Go to step 4.
Go to step 6.
4-19