Tektronix PHASER 380, Service Manual

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6-12
Phaser 380 Color Printer
6
Troubleshooting
4. Check that the pick roller is being rotated. If it is not, go to the topic
“Checking the process motor and drive train” on page 6-12.
Otherwise, go to Step 5. In its starting position, the pick roller’s flat
side should face down; the flat, keyed end on the left end of the pick
roller shaft faces up.
5. Clean the pick roller. Paper dust can coat the pick roller and affect its
ability to grip the paper and pull it out of the tray.
6. Refer to the later topic “PC-based diagnostics” on page 6-24. Use the
motor and solenoid test to check the operation of the paper pick
system.
7.
Inspect the wiring harness leading to the paper pick solenoid clutch
for nicks, cuts or crimped wiring. Ensure the connector is seated.
Check the clutch for proper operation.
8. Inspect the paper path for obstructions.
Print transfer jams
1.
Test the paper preheater sensors. Refer to the later topic, “PC-based
diagnostics” on page 6-24. If the sensor fails the test, replace the paper
pre-heater.
2. Inspect the process idler rollers on the left side of the printer; they
should rotate freely.
3. Inspect the wiring harness leading to the upper feed roller electric
clutch for nicks, cuts or crimped wiring. Ensure the connector is
seated. Check the clutch for proper operation.
4.
Check that the feed rollers rotate smoothly and that the front cover is
fully closed and seated.
5. Check the paper-eject path for obstructions.
Checking the process motor and drive train
1. Determine if the process motor runs. If it does not rotate, go to Step 2.
If it does rotate, go to Step 5.
2. Measure to determine if +40 VDC is being supplied to the motor. If it
is, go to Step 4. If it is not, inspect the process motor's wiring harness.
If the harness is functional, then replace the power control board and
power supply.
3. Disconnect the motor's wiring harness. Measure the resistance of the
motor's windings. The expected resistances are listed in Table 6-4
“Motor and solenoid resistances,” on page 6-10. If the windings are
opened, shorted or far out of tolerance, replace the motor.