Paper Tray Indicates Empty When It Is Not; No Paper Feeder Installed; No Imaging Unit Installed - Tektronix Phaser 550 Service Manual

6
Troubleshooting
6-10 Phaser 550 Color Printer

Paper tray indicates empty when it is not

The procedure for troubleshooting this problem applies to the Lower Tray
Assembly as well.
1. Is the paper empty flag hung in an up position not actuated by paper
in the paper tray? Open the left door to observe the flag in action.
2.
Does the paper empty flag properly interrupt the paper empty sensor
on the paper feeder board?
3. Does the paper feeder, when installed, properly connect to the print
engine? Is the paper feeder's wiring harness properly connected to
the engine driver board (CN309)? (For the Lower Tray Assembly,
check connector CN310). Inspect the wiring harness for defects.
4.
Replace the paper feeder.
5. Replace the engine driver board.

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 driver board is properly installed in connector CN309. Check
the wiring harness for defects.
3. Replace the engine driver board.

No imaging unit installed

1. Ensure that the imaging unit is properly installed and locked in place.
2.
Check the scorotron charger 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. Check the HV terminal connectors for the imaging unit to ensure that
they are not damaged.