Tektronix DSA8300, Service Manual

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Troubleshooting
Table 4-2: Possible causes of instrument failure (cont.)
Failure symptom Possible cause(s) / solutions
Controller appears "dead"; power light comes
on, but monitor screen(s) is (are) blank SO DIMMs incorrectly installed or missing.
Defective ATX board.
Flat LCD panel display blank Check for a defective cable from Front-Panel board to Bridge board.
Check for a defective cable from Power PC board to Front-Panel board.
If an external monitor is plugged in to the DVI-I rear-panel output connector, check
for a display on the external monitor:
If there is no display, verify that the monitor is powered on. If the monitor is
powered on, the ATX circuit board assembly might need to be replaced.
If there is a display, the LCD assembly or the Power PC assembly might need to
be replaced.
Front panel LEDs do not light Replace the Front-Panel board.
Hard disk drive related symptoms Defective hard disk drive.
Replaceable hard disk drive not installed.
Power supply failure.
Replaceable hard disk drive or optionally fi eld installed fi xed hard disk drive not
con fi gured as bootable (slave) master hard disk drive.
Faulty benchtop controller.
CD-RW/DVD related symptoms Defective CD-RW/DVD.
Defective CD-RW/DVD drive cable.
Diagnostic errors Remove all electrical and optical modules from the instrument, then run
diagnostics again. If the instrument passes diagnostics, check for the electrical
and optical module that is causing the failures. Then run diagnostics again.
If the instrument fails the diagnostics without the installed modules, replace the
Time Base assembly, and then run diagnostics again.
Compensation errors Verify that each module is completely installed in the slot.
Remove all electrical and optical modules from the instrument, and then run
compensation again. If the instrument passes compensation, check for the
electrical and optical module that is causing the failure.
If the instrument still fails compensation, replace the Time Base assembly.
Modules not recognized Module fi rmware incompatible with mainframe software version.
Faulty module. Refer to appropriate module service manual for further
troubleshooting information.
Module not fully installed in the slot.
DSA8300 Digital Serial Analyzer and Modules Service Manual 4–51