HP 750 - Manual (Page 167)

Troubleshooting C4705-90000 8-49
28. Bail Stepper
The purpose of this test is to verify the operation of the bail stepper motor.
Perform the bail stepper test as follows:
1 In the Service Tests submenu, scroll to 28 Bail Stepper" and press Enter.
SERVICE TESTS
28 Bail stepper
2 The # / Press Enter to Stop" message is displayed on the frontĆpanel as the bail stepper
motor continuously raises and lowers the bail assembly.
The bail steppermotorcontinuously raises and lowers the bail assembly until you
press Enter.
3 If the bail stepper motor fails to raise the bail assembly twice, then the test has failed.
If the bail stepper motor fails the test, try
replacing one of the following components:
1 Bail steppermotor' page 6Ć46.
2 Bail assembly ' page 6Ć45.
3 Cable assembly ' page 6Ć47.
4 Main PCA ' page 6Ć9.
Only replace one component at a time and perform the “Bail Stepper” test again before
replacing another component. Using this procedure you will be able to determine exactly which
component failed.