Chapter 6 6-11
Digital Control Troubleshooting
Display Troubleshooting (A2, A18, A19, A27)
Troubleshooting a Display with Color Problems
1. Press . If this does not correct the
color problems, continue with the next step.
2. Run display service test 74 as described in “Test Patterns” on page 10-14. Confirm that
there are four intensities for each color.
• If the test passes, then continue.
• If the test fails, then suspect the front panel cabling, A2, A19, or A18.
3. Connect a VGA monitor to the analyzer.
• If the image on the external monitor has the same color problems, then replace the
A19 GSP.
• If the image on the external monitor is acceptable, then there must be a missing
color bit. Suspect the front panel cabling, A2, A19, or A18.
Display
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