Xerox Phaser 8400 Service Manual page 117

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Troubleshooting Procedure for Y-axis Motor
Step Questions and Actions
1 1. Remove any obstructions interfering with
drum rotation.
2. Inspect the drum and ensure the drum
rotates smoothly, if not replace the drum and
retest.
3. Did this correct the problem?
2 1. Disconnect the Y-axis belt.
2. Does the Y-motor shaft rotate smoothly?
3 1. Reconnect the Y-axis belt.
2. Run the Y-axis Motor test.
3. Did the test pass?
4 1. Check the wiring for damage.
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Troubleshooting Procedure for Media Path Motor
Step Questions and Actions
1 1. Run the Media Path Motor test.
2. Did the test pass?
2 1. Check the wiring for damage.
Service Manual
Y-axis motor disconnect. The Y-axis motor is not drawing
the expected power from the supply.
Y-axis motor short. The Y-axis motor is drawing too much
power from the supply.
Media path motor disconnect. The media path motor is not
drawing the expected power from the supply.
Media path motor short. The media path motor is drawing
too much power from the supply.
PEST Description
Yes
Complete.
Go to Step 3.
Replace the
electronics
module.
Replace the Y-axis motor.
PEST Description
Yes
Replace the
electronics
module.
Replace the media path motor.
No
Go to Step 2.
Replace the
Y-axis motor.
Go to Step 4.
No
Go to Step 2.
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