Multiple-Sheet Pick; The Media Skews Passing Through The Paper Path; Paper Tray Indicates Empty When It Is Not - Tektronix Z740/N - Phaser 740 Color Laser Printer Service Manual

Multiple-sheet pick

1. Is the paper in good condition and appropriate for a laser printer? Quality
office laser printer paper works best.
2. Is the printer printing within its environmental specifications?
3.
Ensure the corners or the paper are under the tabs in the corners of the tray.
4.
Clean the pick rollers.
5.
Replace the paper tray.

The media skews passing through the paper path

1.
Make sure that the media is properly installed in the tray.
2. Does the pick-up roller pick up evenly? Is it clean?
3.
Are the tray's side paper guides snugly adjusted against the stack of media?
The guides, while not adjustable, should be neither too loose nor too tight.
4.
Is the paper tray damaged or obstructed?
5.
Is there an obstacle blocking the paper path?
6. Is the media excessively curled?
7. Is the customer using an appropriate type of media – a type the printer can
handle?
8.
Ensure the corners or the paper are under the tabs in the corners of the tray.
9.
If the paper only skews when feed from the upper tray, replace the left door.

Paper tray indicates empty when it is not

The procedure for troubleshooting this problem applies to the Lower Tray Assembly
as well.
1. Does the paper empty flag properly interrupt the paper empty sensor on the
paper feeder board? Open the left door to observe the flag in action.
2.
Test the sensor using the service tests described in "Service tests" on
page 57.
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
control board (CN20)? (For the Lower Tray Assembly, check connector
CN19). Inspect the wiring harness for defects.
4. Replace the paper feeder.
5.
Replace the engine control 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.
38 Phaser 740 Color Printer