Testing For A Shorted Motor; Figure 6-2 Door Safety Interlock Switches - Tektronix Phaser 550 Service Manual

6
Troubleshooting
6-6 Phaser 550 Color Printer
If motor resistances are correct, replace the engine control board. Refer to the
Chapter 8 topic, "Engine control board" on page 8-14.
Front door/
right side door
interlock switch
Fuser installed
switch (under
fan duct)
Left door
switch
Optional lower
tray assembly
door switch

Figure 6-2 Door safety interlock switches

Testing for a shorted motor

1. Remove the cabinet top and rear access panel.
2.
Refer to Appendix C, "Wiring Diagrams" for a diagram that locates
each connector.
3. Turn on the printer again to see if it overloads now that the motors are
disconnected from the engine driver board.
If the power supply is functional, proceed to the topic, "Testing motor
resistances" on page 6-7.
If the motors and solenoids are functional, but the power supply still does not
function, replace it. Refer to the Chapter 8 topic, "Power supply" on page 8-11.
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