Xerox 7300B - Phaser Color Laser Printer Service Manual page 54

Troubleshooting Procedure Table (cont'd.)
Steps Actions and Questions
6 Check the sensor for debris that could
interfere with normal operation.
Is there debris present?
7 Verify the wiring harness for the problem
sensor is free from damage or defects.
8 Use service diagnostics to test the
following:
Exit Gate Solenoid (Duplex)
Face-up Solenoid (Top-Side Output)
Do the solenoids operate correctly?
9 Visually inspect the Registration Rollers
for gaps between rollers and ensure the
grounding strap is in place properly.
Is there a gap between the Registration
Rollers?
10 Use service diagnostics to test the
following motors/clutches.
Main Feed Motor
Transfer Unit Motor
Registration Motor
Registration Clutch
Fuser Motor
Does the motor/clutch function correctly?
11 Inspect the wiring harness for each motor
and clutch.
Are the wiring harnesses properly
connected and free from defects?
2-38
Yes
Clean the sensor
or remove debris.
Replace the
sensor.
Go to step [9].
Replace the
Registration Roller
Assembly.
Replace the
Engine Controller
Board.
Replace the
Engine Controller
Board.
Phaser 7300 Color Printer Service Manual
No
Go to step [7].
Replace the
wiring harness.
Replace the
solenoid.
Go to step [10].
Go to step [11].
Replace the
wiring harness
and/or the
problem
motor/clutch.