Service Guide
45
No paper feeder installed
1.
Check to see if the paper feeder is properly installed in the printer and making
good electrical contact. Push it in all the way.
2.
Ensure that the wiring harness leading from the paper feeder to the engine
control board is properly installed in connector CN20. Check the wiring harness
for defects.
3.
Replace the engine control board.
No imaging unit installed
1.
Ensure that the imaging unit is properly installed and locked in place.
2.
Check the main charge grid boss on the rear of the charger to ensure it is not
broken. When the imaging unit is installed, the boss pushes a flag on the
charger sensor board. Replace the charger or imaging unit if it is broken.
3.
Test the sensor using the service tests described in “Phaser 740 service tests” on
page 77 or “Phaser 750 service tests” on page 80.
4.
Check the high-voltage terminal connectors for the imaging unit to ensure that
they are not damaged.
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General