HP 7925D Service Manual page 111

7925
Either IL of T LED indicator lit and heads not
retracted.
Remove power and check for continuny be-
tween A9TP ERV and A9TP LMV.
Troubleshooting
NOTES:
1. Refer to the following diagram for circuit details.
• Head Positioning System Functional Diagram,
fig. 4-26.
2. PCA's associated with CRB malfunction include:
• Power and motor regulator PCA-A9.
Replace PCA-A9.
Actuator assembly probably jammed. Repair
or replace.
7311-23
Figure 4-21. Emergency Return (CRB) Troubleshooting Flowchart
4-37