Jean-Marc,
I downloaded the 7B52 manual and that does indeed help. Thanks for the suggestion!
Unfortunately, I think my signals stop at TP470 which makes me fear a TD (or TDs) is bad. I think someone has already been in that area and may have either replaced or resoldered one of them; however, Q466 could be the issue. Either HoldOff is enabled or it may be bad. I just haven't gotten that far with troubleshooting yet.
Thanks again,
Barry - N4BUQ
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----- Original Message -----
From: "Jean-Marc Imbert" <jmimbert@...>
To: "tekscopes" <[email protected]>
Sent: Friday, December 10, 2021 1:50:49 PM
Subject: Re: [TekScopes] 7B53N sweep repair
Barry,
Barry,
Yes same for U750 , it is also a 155-0042-03 IC on mine.
I will buy an Artek copy, thanks.
For your trigger, the 7B52 wil be a good reference for trigger voltages and
waveforms and trigger schematics as well. Fetch it from the tekwiki, as well
as the troubleshooting manual here from the same tekwiki :
.
Regards
Jean-Marc.
