3-26 Phaser 5500 Printer Service Manual
Laser Motor Failure - U3-5 Polygon Motor Rotation
The Scanner Motor, located in the Laser Assembly, failed.
Applicable Error Code
Laser Failure - U3-5 Polygon Motor Rotation
6
Check continuity between the Laser
Assembly and the Engine Logic Board.
Is there continuity on each wire
between P/J130 <=> P/J406?
Go to Step 7. Repair the wiring.
7
Check for +5 V to the Laser Assembly.
Is there +5 V across P/J140-8 (+) <=>
ground?
Go to Step 8. Replace the
Engine Logic
Board
(
page 8-89).
8
Check for +24 V to the Laser.
Is there +24 V across P/J130-5 (+) <=>
ground?
Replace the Laser
Assembly
(page 8-74).
Replace the
Engine Logic
Board
(
page 8-89).
Scanner Motor Troubleshooting Reference
Applicable Parts References
■ Drum Cartridge
■ Laser Assembly
■ Engine Logic Board
■ Print Engine P/J Laser and Exit PWB (page 10-7)
■ Print Engine laser Assembly Wiring (page 10-29)
■ PL5.1 Laser, CRU and Toner Dispense (page 9-32)
■ PL8.1 Print Engine Electrical (page 9-40)
Scanner Motor Troubleshooting Procedure
Step Actions and Questions Yes No
1
Check the Drum Cartridge installation.
Is the Drum Cartridge installed
properly?
Go to Step 2. Correct the
installation.
2
Test the Scanner Motor.
Run the Service Diagnostics Laser Scan
Motor test.
Does the motor run?
Replace Laser
Assembly or
Engine Logic
Board.
Go to Step 4.
3
Check the Laser connection.
Are P/J140 and P/J406 connected?
Go to Step 4. Connect the
Laser Assembly.
Laser Assembly Troubleshooting Procedure (Continued)
Step Actions and Questions Yes No
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