Tektronix WFM5250, Service Manual

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General Maintenance
This section contains the information needed to perform periodic and corrective
maintenance on the instrument. The following subsections are included:
Preventing ESD – General information on preventing damage by electrostatic
discharge.
Inspection and Cleaning – Information and procedures for inspecting and
cleaning the instrument.
Troubleshooting – Information for isolating and troubleshooting failed
modules. Included are instructions for operating the diagnostic routines and
troubleshooting trees. Most of the trees make use of the internal diagnostic
routines to speed fault isolation to a module.
Removal and Replacement Procedures – Information and procedures for
removing and replacing modules in the instrument.
Repackaging Instructions – Information on returning an instrument for
service.
Preventing ESD
Before servicing this product, read the Safety Summary and Introduction at the
front of the manual, and the ESD information below.
CAUTION.
Static discharge can damage any semiconductor component in the
instrument.
When performing any service that requires internal access to the instrument,
adhere to the following precautions to avoid damaging internal modules and their
components due to electrostatic discharge (ESD).
1. Minimize handling of static-sensitive circuit boards and components.
2. Transport and store static-sensitive modules in their static protected containers
or on a metal rail. Label any package that contains static-sensitive boards.
3. Discharge the static voltage from your body by wearing a grounded antistatic
wrist strap while handling these modules. Service static-sensitive modules
only at a static-free work station.
4. Nothing capable of generating or holding a static charge should be allowed
on the work station surface.
5. Handle circuit boards by the edges when possible.
WFM5250 Waveform Monitor Service Manual 9