Head Positioning Troubleshooting Flowchart - HP 7925D Service Manual

Troubleshooting
Yes
Replace PCA-A2.
NOTES:
1. Refer to the following diagram for circuit details.
• Head Positioning System Functional Diagram,
fig. 4-26.
2. PCA's associated with head positioning malfunctions include:
• I/O sector PCA-A2.
• Servo PCA-A3.
• Drive control PCA-A4.
• Track follower PCA-A5.
• Motherboard PCA-A?
• Power and motor regulator PCA-A9.
Replace PCA-A2.
No
Replace PCA-A3.
7925
No
Replace PCA·A5.
No
Replace PCA-A9.
7311-22(1 )A
4-34
Figure 4-20. Head Positioning Troubleshooting Flowchart (Sheet 1 of 3)