General Maintenance
Table 4-4: Symp
toms and causes
Symptom Possible sources or recomm ended detailed troubleshooting procedure to follow
No LEDs l it and XGA output not working Perform general checks
Perform primary power supply checks
Perform seco
ndary power supply checks
Replace main circuit board
Fault Light on after 15 sec boot up Check error status page for more information
Check diagnostic log for more information
Perform fau
lt LED problem isolation
Inconsist
ent or partial hardware failures
Perform pr
imary power supply checks
Perform secondary power supply checks
Replace main circuit board
Fails any of these Power On Self Tests
(POST):
Timecode Decoder
Cmpst D ecoder
Composi
te DAC
DSP FPGA
Display FPGA
Review messages in diagnostic log
Perform primary power supply checks
Perform s
econdary power supply checks
Replace the main board
Diagnostic log shows Fail on any of
these
Advanced Diagnostics:
ADV_DIAG_LSS
Review messages in diagnostic log. If the w avef orm rasterizer also fails other tests as
well,
then suspect main board and perform the primary and secondary power supply tests.
If only this test fails, then perform Isolating Advanced Diagnostic Lissajous Errors
procedure to isolate the problem to main or audio board.
WVR6020, WVR7020, and WVR7120 Waveform Rasterizers Service Manual 4–7
To Next Page
Loading...
Need help?
General
