No Fuser Installed Message When It Is; No Fuser Roll Installed Message When It Is; Front Door Open When It Is Closed - Tektronix Z740/N - Phaser 740 Color Laser Printer Service Manual

No fuser installed message when it is

1. Ensure that the fuser is correctly installed.
2.
Check the fuser's connection and wiring.
3. Check the wiring harness leading to the fuser power connector.
4. Replace the fuser.
5.
Replace the engine control board.

No fuser roll installed message when it is

1.
Ensure that the fuser roll is correctly installed.
2.
Check the fuser's connection and wiring.
3. Check the wiring harness leading to the fuser power connector.
4. Replace the fuser.
5.
Replace the engine control board.

Front door open when it is closed

1.
Inspect that the front door's interlock for damage.
2.
Inspect the cartridge selector/eject unit interlock mechanism for damage.
3. Inspect the front door cartridge selector/eject unit interlock mechanism.
Ensure that when the interlock is actuated by the cartridge selector/eject
unit being closed, the interlock switch, mounted on the toner cartridge drive
unit, closes (with an audible click).
4.
Replace the interlock switch.
5.
Replace the power supply.
6.
Replace the engine control board.
44 Phaser 740 Color Printer