I repaired a TDS520 with exactly same error screen after repairing a (literally) burned power supply. In my case leaking electrolytic caps damaged a trace to U900 on acquisition board.
Ozan
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Hi to all usual suspects here.
You will maybe remember you helped me resurect my 7704A from decades of non
working neglect. Thanks!
Here is for me a new challenge. I did a large leap in time from the 7704A and
just bought a TDS520.
At boot:
All ok except:
FAIL++Acquisition
FAIL++ Attn/Acq interface
As soon as I knew it will be coming I read here all I could about it so I know
that Artek has the documents.
Btw I want to praise Artek a bit here. I bought them the service manual for my
two HP8640B I just bought too (yes, two is gluttony, I know but they were
cheap and defective of course, so how to resist?)
Anyway Artek gives a really good service. The manuals are of upmost quality. I
got them instantly and the charge is very reasonable.
I posted the boot to "TDS520 in Brittany"
/g/TekScopes/album?id=291619
Also the 1993 rom: A11U1331 ver 1.5
There's a 7 segments inside at the back which only blinks alternately his two
right segments.
Apart for the fails the scope is in perfect shape and was only very dusty
inside. I disinserted all flat cables I could find and re-inserted them. I
also removed the dust with hope this will change the fail boot (not really!)
It did not.
All advices will be received gratefully.
