Paper Jams At The Second Bias Transfer Roller - Tektronix Phaser 550 Service Manual

6
Troubleshooting
6-12 Phaser 550 Color Printer

Paper jams at the second bias transfer roller

1.
Clean the intermediate rollers.
2. Is the transfer roller correctly installed?
3. Does the paper jam sensor flag properly interrupt the sensor? Check
the wiring harness of the paper jam sensor leading to CN603 of the
paper feeder board.
4. Does the drive intermediate roller rotate? If not, check the gear train
driving the gears for proper installation and for broken teeth.
5. Check the left side door for burrs or foreign obstructions that could
block the movement of a sheet of paper.
6. 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.
7. Check the paper aligning sensor's flag to see that it properly
interrupts the aligning sensor. Check the wiring harness from the
sensor's board to CN602 of the paper feeder board.
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.
11. Check the spring pressure at each end of the aligning rollers. Lifting
each end of the roller with a tension gauge should reveal a
measurement of about 1 kg (2.2 lbs).
12.
Check the left side door for burrs or foreign obstructions that could
block the movement of a sheet of paper.
13. Try printing using a different paper tray.