Print Transfer Jams - Tektronix PHASER 840 Service Manual

5.
Check that the pick roller is being rotated. 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. If it is not facing up, go to the topic
"Checking the process motor and drive train" on page 66. Otherwise,
go to Step 6.
6.
Clean the pick roller, if visibly dirty, with 90% alcohol and a lint-free
cloth. Paper dust can coat the pick roller and affect its ability to grip the
paper and pull it out of the tray. Also clean the transport rollers if they
are visibly dirty.
7. Use the PC-based diagnostic's Verify Drive Current Requirement Test
to check the operation of the paper-pick system.
8. Inspect the wiring harness leading to the paper-transport clutch for
nicks, cuts or crimped wiring. Ensure the connector is seated.
9.
Inspect the paper path for obstructions.
10.
Inspect the rollers, bushings and gears of the paper path.

Print transfer jams

1.
If a piece of paper is trapped in the paper preheater, try pushing out the
paper by inserting a stiff piece of cardstock into the paper preheater.
2.
Using PC-based diagnostics, test the paper preheater sensors. If the
test fails, replace the paper/drum heater assembly.
3.
Check to see if the upper feed roller drive belt is broken or slipped off
of its pulleys. In such a case, the upper feed roller does not rotate when
the lower feed roller rotates.
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. Ensure no small pieces of
paper are trapped around the stripper fingers or rapid release guide.
6. Ensure that the transfix roller rotates during the transfix process.
7.
Test the sensors in the paper path. Look for damaged or non-operating
sensor flags.
8.
Check the transfix solenoid and its cam. Ensure they operate correctly
and are properly lubricated. If lubrication is needed, apply a dab of
grease to the contact point between the cam and the latch and the cam
and the cam-advanced spring. Refer to "Lubrication" on page 119.
Service Guide
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