VX4380 256-Crosspoint Relay Matrix Module User Manual D–1
Appendix D: User Service
This appendix contains service-related information for the VX4380 that covers
the following topics:
HPerformance verification
HPreventive maintenance
HTroubleshooting
HUser-replaceable parts

Performance Verification

You may use the Operational Check procedure listed in Getting Started to verify
that the module is operating correctly. The instrument has been fully tested and
calibrated before leaving the factory.
If the self test or diagnostic commands indicate a failure, contact your Tektronix
field office or representative for assistance.

Preventive Maintenance

You should perform inspection and cleaning as preventive maintenance.
Preventive maintenance, when done regularly, may prevent VX4380 malfunction
and enhance reliability. Inspect and clean the VX4380 as often as conditions
require by following these steps:
1. Turn off power and remove the VX4380 from the VXIbus mainframe.
2. Remove loose dust on the outside of the instrument with a lint-free cloth.
3. Remove any remaining dirt with a lint-free cloth dampened with water or a
75% isopropyl alcohol solution. Do not use abrasive cleaners.

Troubleshooting

If you suspect a malfunction, first double check connections to and from the
VX4380. If the trouble persists, perform the Functional Check.
If the self test indicates a failure, contact your Tektronix field office or represen-
tative for assistance.