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When you say Tantalum, are you talking about the small metal can capacitors with the tiny black plastic base? They are standard SMD type aluminium electrolytic. They should all be replaced with

If you swap the cables coming from the readout to the vertical and horizontal boards, what does that show? Thanks, Barry

OP save time, avoid many more text notes PLEASE take clear pix the 7704A problem, go to this group Photos section, start new album, name like like "7704ARO" Upload the pix to FULLY AND CLEARLY

top is now at center, bottom is below the bottom of the screen but still there. when I use the beam finder button I can see that all is displaying well, and readout value changes when i change volts

By this, do you mean what should be at the top is now at the center and, possibly, what should be at the bottom is not there at all? Thanks, Barry - N4BUQ

Thank you. I'm new to groups.io so I'll look at getting some pictures posted of the unit. I'll give it a go reseating what I can on the readout board, hopefully it helps!

Both traces will display fine at the moment, just the readout issue

Correct yea, it appears its all there! just in the wrong position shifted down!

Rafael, The solid Al condensers can be replaced with tantalum, surface mount or radial. Go to 16V if you use tantalum as a precaution. Tantalums will have very low ESR. If these are decoupling, the

P.D. There’s something I forgot to mention, perhaps I didn’t make it clear earlier. I’m located in Lima, Peru. Greetings from this part of the world. Rafael

Hello, I’m truly grateful for your willingness to help and for all the suggestions regarding the repair of my TDS. I don’t want to be intrusive or take advantage of your kindness, but there’s

This would be a good choice for C17 from Digikey: https://www.digikey.jp/short/98zq51pp It has high ripple current capacity and very low ESR and ESL for its capacitance and voltage rating. Lifetime is

A moment please...is it a stable or intermittent, moving vertical position? 1/ A photo is worth 1M words , post images to photos, create an album 2/ Tek 7000 circa 1970s..1980s boards are

Rafel, Mouser has the 47mfd in stock in two versions, 647-UCY2C470MPD (12,000 hour 160V) and 647-UHE2A470MPD (7000 hour). Digikey has a 56mfd UHE UHE2A560MPD (7000 hour). The UHEs are 100V. I do not

Good evening, I disassembled the PSU again and checked capacitor C17, which has an ESR of 0.5 ohms—I think it’s fine. Then I tested transistor Q9, and it doesn’t show any unusual readings.

Is the trace also compressed? If so, look at the vertical board. The output IC could be bad or dirty contacts in the socket. Mark

There was an extended discussion including /g/TekScopes/message/132588 that might add usefully to the responses you've received here. Best, George.

I opened the TDS380 up yesterday and didn't find anything obvious with a visual inspection. I powered it up to start checking voltages on the LVPS and it booted normally . . . all voltages were in

Just to clarify, the text is readable and is normal height, they're just at/near the center. Is that correct? Maybe for extra clarity: “They’re *both* at/near center? Raymond

Just to clarify, the text is readable and is normal height, they're just at/near the center. Is that correct? Thanks, Barry - N4BUQ