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Gould Datasys 770 / 840 / 944

wilwin

Sep 13, 2017
5
Joined
Sep 13, 2017
Messages
5
Hello,

I was wondering that somebody could help me with a service manaul for the Gould Datasys 700/800/900 series ?
I love this scopes and have several of them : two 770 syncroscopes, a 840 and a 944.
Problem are the varta bateries who leak in the years... They destroy the copper lanes around it.
i have only one good cpu board anymore at the moment ( they are all the same except the software in the 4 eproms).
I have tried to repair the boards, but thats very difficult, there are 4 layers of tracks and not easy to follow the conections.
It would be a great help if i had the schematics. Maybe the 6000 and 7000 series has the same cpu board, i dont know.
Im been searching for a long time on the net for this manuals but could not find them. Hopeless....
The 944 has also other problems ( i think it was the last scope from Gould Datasys).
The user manual for the 840 i have, but the only info here is to reset the scope ( powerup withe holdall button pressed until beep).
I even found accidently the service menu: press 4 times on the 1 button. you can do many test here, but it doesnt of course solve a hardware problem.
So if anyone can make me happy....
I would pay for the manuals if needed . ( for digitalising them...)



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kellys_eye

Jun 25, 2010
6,514
Joined
Jun 25, 2010
Messages
6,514
Try over at the EEVBlog site - their test equipment membership is vast.
 

wilwin

Sep 13, 2017
5
Joined
Sep 13, 2017
Messages
5
Thanks
have it done also.
but till now no schematics found.
must be done like reverse engineering, but this is very time consuming and not easy to do....
 

kellys_eye

Jun 25, 2010
6,514
Joined
Jun 25, 2010
Messages
6,514
I've seen your post on the UKVR site too! If EEVBlog and UKVR can't help then you're pretty much stuck.....
 
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