Phaser 4500/4510 Service Manual 4-17
General Troubleshooting
Registration Sensor
9 Replace the LVPS (page 8-62).
Does the problem still occur after
replacement?
Replace the
fuser
assembly
(page 8-44).
Problem
solved.
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Registration sensor
■ Registration sensor actuator
■ 150-sheet feeder assembly
■ Tray 1 assembly harness
■ Chute assembly harness
■ HVPS/engine logic board
■ LVPS
■ “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
Troubleshooting Procedure
Steps Actions and Questions Yes No
1 Check the registration sensor actuator for
operation and shape:
1.Remove the 150-sheet feeder assembly
(page 8-15).
Does the registration sensor actuator
operate smoothly?
Is the flag of the registration sensor
actuator formed normally to shield the
sensor detecting point?
Go to step 2. Replace the
150-sheet
feeder
(page 8-15).
2 Check the registration sensor:
1.Re-connect J241 of the tray 1 assembly
harness to the registration sensor (with
150-sheet feeder removed).
2.Enter Service Diagnostics, and from the
Sensor Tests menu select
Registration Sensor.
3.Manually actuate the registration sensor.
Does the sensor operate correctly?
Replace the
HVPS/engine
logic board
(page 8-73).
Go to step 3.
Troubleshooting Procedure (continued)
Steps Actions and Questions Yes No