Il Led Indicator Troubleshooting Flowchart - HP 7925D Service Manual

7925
NOTES
Troubleshooting
Check seating of all peA's except A 11 and
A 12. If ok, check fuses on power supply as-
sembly. If ok, check fuses on PMR board.
If ok, check that ac line voltage is within
tolerance using a battery-operated DVM.
If ok, check following voltages.
VOLTAGE TEST POINT
+36 Vdc A9J2-4
-36 Vdc A9J2-7
Check vol tage at followi ng test points on
PCA-A5. (Refer to para. 4-3 for measure·
menttolerances.
No
Refer to the following diagram for circuit details
• Mainframe Assembly WIring Diagram, fig. 4-23.
2 peA's associated with IL malfunction includes
• Power and motor regulator PCA·A9
>---~
Replace PCA-A9
VOLTAGE
+5 Vdc
+12 Vdc
-12 Vdc
TEST POINT
A5Jl-5
A5Jl-3. C
A5Jl-2. B
Ves
Remove A9Pl from peA-Ago (Drive power
off,) Check voltages at the following TP
VOLTAGE
+5 Vdc
+12 Vdc
-12 Vdc
TEST POINT
A9J 1-32. 30. 29. 34
A9JI-35.36
A9JI-38.37
7311-6(1 )A
Figure 4-4. IL LED Indicator Troubleshooting Flowchart (Sheet 1 of 2)
4-13