Agilent 35670A

Troubleshooting the Analyzer

 

To troubleshoot display failures

Step 2. Check the CPU signals to the Display assembly.

Set the power switch to on ( l ).

Using a logic probe, check that the following TTL signals are toggling.

G

Test Location

Signal Name

In/Out

 

 

 

 

 

 

A7 P2(9)

VSYNCEL

A7 Out

 

 

 

A7 P2(11)

HSYNCELn

A7 Out

 

 

 

A7 P2(13)

VCLK

A7 Out

 

 

 

A7 P2(15)

VID

A7 Out

If the signals are incorrect, do the following:

Set the power switch to off ( O ).

Disconnect the display cable from A7 P2.

Set the power switch to on ( l ).

Check the signals again.

If the signals are now correct, the A101 Display assembly is probably faulty.

A7 Component Locator, Circuit Side

4-23

Page 199
Image 199
Agilent Technologies 35670-90066 manual Test Location Signal Name In/Out