Agilent Technologies 35670A Service Manual page 199

Agilent 35670A
Step 2. Check the CPU signals to the Display assembly.
G
• Set the power switch to on (
• Using a logic probe, check that the following TTL signals are toggling.
Test Location
A7 P2(9)
A7 P2(11)
A7 P2(13)
A7 P2(15)
• If the signals are incorrect, do the following:
• Set the power switch to off (
• Disconnect the display cable from A7 P2.
• Set the power switch to on (
• Check the signals again.
• If the signals are now correct, the A101 Display assembly is probably faulty.
A7 Component Locator, Circuit Side
).
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Signal Name In/Out
VSYNCEL A7 Out
HSYNCELn A7 Out
VCLK A7 Out
VID A7 Out
).
O
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Troubleshooting the Analyzer
To troubleshoot display failures
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