HP 7925D Service Manual page 109

7925
Troubleshooting
Replace PCA-A4.
Replace/adjust solenoid.
On carriage solenoid, short top lug to
ground.
Replace PCA-A9.
Check if servo head is disconnected, servo
code is missing, or servo head is bad. If
malfunction remains, replace PCA-A5. If
malfunction remains, replace PCA-A3.
Replace PCA-A5. If malfunction remains,
replace PCA-A3. If malfunction remains, re-
place PCA-A4.
Replace PCA-A3. If malfunction remains,
replace PCA-A2. If malfunction remains, re-
place PCA-A5.
No
Spindle is not up to speed. Refer to spindle
rotating troubleshooting flowchart, fig. 4-19.
7311-22(2)A
Figure 4-20. Head Positioning Troubleshooting Flowchart (Sheet 2 of 3)
4-35