Tektronix WFM5250, Service Manual

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Troubleshooting
Troubleshooting
The procedures in this section will help you trace the root cause of a problem back
to one of the replaceable modules. In general, this is a board-level replacement
but there are a few components on some boards that are replaceable.
WARNING.
Before performing this or any other procedure in this manual, read the
General Safety Summary and Service Safety Summary found at the beginning of
this manual.
To prevent possible injury to service personnel or damage to electrical component,
refer on how to prevent ESD. (See page 9.)
Getting Started
The following troubleshooting information consists of two sections: Symptoms
and Causes and Detailed Troubleshooting Procedures .
The fi rst section contains a table with common problems and recommended
actions. The table may also direct you to one of the detailed troubleshooting
procedures in the second section. When using the table to troubleshoot, investigate
and resolve the
fi rst symptom you fi nd, because the Recommended Actions are
effective only if the functions covered earlier in the table are working correctly. If
you do not
fi nd your problem in the table, or if no speci fi c problem was reported
by the user, follow the steps in the Unknown Problem section of the table.
The WFM5250 Waveform Monitor is highly con fi gurable, and its behavior is
sometimes complex. Before troubleshooting in-depth, verify that:
The installed options are as expected. See CONFIG > Utilities > View
Instrument Options
The current settings support the expected behavior. A good fi rst step is to
recall the Factory Presets. To do this, press PRESET > Recall Preset > Recall
Factory Preset.
To fully test this instrument, you must have an appropriate Serial Digital Video
source and an HDMI signal source. In some cases, you may also need receivers or
an oscilloscope to check outputs.
This instrument consists of several boards and major components. The objective
of this troubleshooting guide is to isolate a problem to a module or board so it
can be replaced. This guide does not provide information to troubleshoot to the
component level.
14 WFM5250 Waveform Monitor Service Manual