Run/Stop Switch Troubleshooting Flowchart - HP 7925D Service Manual

Troubleshooting
Check RUN/STOP switch for proper
mechanical/electrical operation.
Replace PCA-A4 with card extender (without
PCA·A4 installed on extender). Check cur-
rent path from P2-16 on extender to terminal
on RUN/STOP switch with wht/yel/blu wire
attached (RUN) and from P2-U to terminal
with wht/yel/org wire attached (STOP).
Repair wiring or replace PCA·A?, PCA-A11,
or connectors, as necessary.
NOTE:
Refer to the following diagram for circuit details.
• Spindle Rotation System Functional Diagram, fig. 4-25.
Replace RUN/STOP switch.
Refer to DRIVE FAULT indicator trouble-
shooting flowchart, fig. 4-3.
792'5
7311-20
4·30
Figure 4-18. RUN/STOP Switch Troubleshooting Flowchart