HP 750 - Manual (Page 161)

Troubleshooting C4705-90000 8-43
22. X Motion Control
The purpose of this test is to determine the power required to move the drive roller.
Perform the X motion control test as follows:
1 In the Service Tests submenu, scroll to 22 X Motion Control" and press Enter.
SERVICE TESTS
22 X Motion control
2 The Remove Media / Press Enter" message is displayed on the frontĆpanel. Remove the
media (if loaded) and press Enter to start the test.
3 The Faster / Slower" message is displayed on the frontĆpanel. Use the Up Arrow to
increase the speed of the drive roller and the Down Arrow to decrease the speed of the
drive roller.
4 Press the Enter button.
5 The X Max PWM = # / Press Enter" message is displayed on the frontĆpanel.
If the maximum value (#) of
X Max PWM is less than 100 then the test has passed.
If the maximum value (#) of
X Max PWM is more than 100 then the test has failed.
If the test fails, try replacing one of the following components:
1 XĆaxis motor ' page 6Ć25.
2 Main PCA ' page 6Ć9.
Only replace one component at a time and perform the “X Motion Control” test again before
replacing another component. Using this procedure you will be able to determine exactly which
component failed.