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Thanks Clark, Chuck. Very interesting. The leads to the CCDs don't appear to be connected to any of its DIL pins. They look like they are soldered directly on to the substrate. The SL92104 looks a

Your old capacitors are best tan new, sure! -----Mensaje original----- De: [email protected] [mailto:[email protected]] En nombre de Vince Vielhaber Enviado el: miércoles, 9 de septiembre de 2020

Dave, I'm sure you noticed - the faceplate and rear connector panel are all hand-lettered. A nice lettering job, but is this actually a Tek item? Maybe if the original silkscreened labels were worn

Actually my partner used that procedure regularly, I think it’s a bit drastic but he swears by it. Regards, Stephen Hanselman Datagate Systems, LLC

On ebay,?362868002250; not sure what it really is- what caught my eye was the two 125ohm GR connectors on the rear. Maybe someone's accessory for part of a 519 system? -Dave

I'd suspect serious consequences on anything other than 2 layer PC boards, and even then.... I think I'd prefer a, perhaps slower, method. Harvey

Maybe it does for shorted tantalum capacitors. Not guaranteed to work on shorts inside the PCB. Oh, it will show you where the short is alright, but that doesn't mean the short will clear or the PCB

So what do you do to repair craters in the PC board? Harvey

Ok, the problem has been solved! As Siggi said, "this makes no sense". He was right, it made no sense. On the inverting input of U870A is the 4.99V reference. It measured 5.14V and the non-inverting

Richard, I found some clues about the little board on the Timebase board. It is named "ERD Shift Adjust." ERD is a digitizing mode called "extended real-time digitizing." The little board allows for

Richard, I can consult my micro fiche file for factory modifications. It's a bit tedious and slow to paw through the film, but I'll have a look. Clark

Our favorite way was to use a HP 2100 power supply 5VDC at 50Amps. Finds’um every time Regards, Stephen Hanselman Datagate Systems, LLC

Harrison, When my U550 failed, I got one from Sphere. I don't think they were listed on his site but, at least at that time, had some pulls from working scopes. You might check there if you still

I am preparing to remove the Dallas DS1742W-150 NVRAM chip with dead lithium cell from my scope. My plan is to add a low-profile socket, then to cut-out the dead cell and extend the connections to a

I am afraid that I have been jumping around too much and now, even with good shop notes, am not sure what elements/modules I think are good and which might be bad. Looking at the troubleshooting

Hello Sparky, my preferred method for instant finding of shorts in these caps is with my IR-Cam. You may supply the +15V rail with a current limited supply, or shortly apply mains power - the

Ok, But there was an option on the 7D20 that made it work with the 7854 digital storage scope. Perhaps that is the option you seek? -Chuck Harris Clark Foley wrote:

From my experience with these, certain PCB revisions have an issue in the EHT section; on one I've repaired, there had been creepage and flashover in the high resistance potential divider chain which

Maybe he's of the KISS lobby :)

'Osculation' ???? (Sorry, couldn't resist it !!!) Tim [email protected]> wrote: