Paper Jams Midway In The Paper Feeder; Paper Jams At The Second Bias Transfer Roller - Tektronix Z740/N - Phaser 740 Color Laser Printer Service Manual

5.
If the pick roller does rotate, is the pick roller correctly installed (flat side of
the cam-shaped pick rollers face down prior to picking a sheet of paper)?
Does the pick solenoid work properly? It must energize for the pick roller to
be engaged and rotate. If it doesn't, replace the paper feed circuit board.
Replace the paper feeder.

Paper jams midway in the paper feeder

1.
Ensure that the pick-up rollers are clean.
2. Check the left side door for burrs or foreign obstructions that could block
the movement of a sheet of paper.
3. Clean the intermediate rollers (pinch roller and drive roller).
4.
Check the pinch intermediate roller mounted on the inside of the left door
for even spring tension at each end of the roller. The spring tension should
measure about 65 grams when the roller end is in the middle of its travel in
its slot.
5.
Does the pick-up roller clutch work properly?
6. Try printing using a different paper tray.
7. Transparency film. Do not use transparency film in the lower tray of the
Lower Tray Assembly.

Paper jams at the second bias transfer roller

1. Clean the intermediate rollers.
2.
Is the transfer roller correctly installed?
3.
Is the transfer roller moving up for image transfer when it should?
4. Does the paper jam sensor flag properly interrupt the sensor? Check the
wiring harness of the paper jam sensor leading to CN607 of the paper feeder
board.
5. Does the drive intermediate roller rotate? If not, check the gear train driving
the gears for proper installation and for broken teeth.
6.
Check the left side door for burrs or foreign obstructions that could block
the movement of a sheet of paper.
7.
Check the pinch intermediate roller mounted on the inside of the left door
for even spring tension at each end of the roller. The spring tension should
measure about 65 grams when the roller end is in the middle of its travel in
its slot.
8. Clean the aligning rollers.
9. Do the aligning rollers rotate during a paper pick? Determine if the aligning
roller clutch operates correctly.
10.
Check that the paper feeder wiring is properly installed and that the wiring
harnesses are not damaged.
40 Phaser 740 Color Printer