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Troubleshooting
Troubleshooting
This section contains information and procedures designed to help you isolate
faulty modules in the instrument. If an assembly must be replaced, follow the
removal instructions. (See page 24,
Check for common problems
Use the following table to isolate possible failures.
Table 2: Possible causes of instrument failure
Failure symptom
Possible cause(s) / solutions
Mainframe will not power on
Power cord not plugged in.
Failed fuse.
Faulty power supply.
Faulty modules.
Main power switch (rear panel) not on.
Front panel power switch not on.
Monitor not connected properly.
Front panel light comes on (mainframe
powers on), but one or more fans will not
operate
Faulty fan cable.
Defective fan assembly.
Faulty power supply.
Mainframe powers on but no signal displayed
Wrong channel is selected; select correct channel from front-panel channel
selector or vertical setup menu.
Module not fully installed in the slot.
Signal cable not connected properly.
Wrong trigger input; check trigger cable connection to either direct or prescale
trigger input and make sure that the corresponding trigger source is selected in
the Trigger Setup menu.
Controller appears "dead"; power light comes
on, but monitor screen(s) is (are) blank
SO DIMMs incorrectly installed or missing.
Defective ATX board.
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DSA8300 Digital Serial Analyzer and Modules Service Manual