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Look up " james_s <https://www.eevblog.com/forum/profile/?u=127611>" on EEVBLOG. He has a much better solution. i would show you a picture, but I don't know how in here. 320041677522-0001@...>

Don't know where "right below.." is. I've taken the liberty to introduce the term "Replaceable Parts Registry" on Tekwiki for those who don't know the term "RPR" (yet). Both terms give ahit now.

[email protected]> wrote:

Oh, interesting. I assumed you were talking about the 5VD, which is the main switch-mode regulated supply that feeds all the digital logic. You're talking about the linear regulated 5V supply. Same

Per Dave Brown: release and are posted on TekWiki. I don't know if they all are there >but they can be scanned and uploaded. They've served me well for around 40 years. There are more of them up on

I wouldn't even think of interfacing the 1S1 with anything other than a 530,540.550 series Tek scope. It's a complex interface, involving not just the connector but several different power supplies

You probably tried AQS because I pointed to that. Something very strange is going on with AQS in my 7854 (or with my brains?) AQS worked at 0.5 ms/div but not at 0.2 ms/div and faster. OK. Later on I

No pictures this time but, (YET AGAIN) it's changed behavior, now its getting AVG acquisitions (mostly) fine (As in not erroring out but still occasionally having some weird defects to the wave but

Hi, I would first check the power supply. I'm not a big fan of "the universal internet method of fixing everything", that is indiscriminately recapping stuff, but in the case of the 24xx family DSOs,

That's the purpose of the common parts catalogs of which we also got a release and are posted on TekWiki. I don't know if they all are there but they can be scanned and uploaded. Dave

The 1S1 is a fine sampler when it works. It is however what I would call "high strung". It has a way of failing in interesting and completely different ways all the time. It is also not easy to

F269 is soldered but I was able to clip onto L256. A minor amount of ripple that only changed by a few millivolts when I added a 2200uf cap across it. No change when I switch below 200ns. The 5V

Isn't that an HP 1740A 'scope? You won't see the Reply icon unless logged in. Raymond

Hi Dave, My comments embedded That's true when looking for Tek part numbers. The added value of OCR here would be *reverse* use: "What's the Tek no. of a 2N4275?" Unless the reverse list is available.

I am of the minority opinion here. The file is linear. You grab the scroll bar and scroll to where you need to be. For me it's quick. I'm just waiting for someone to post an OCR'd/searchable file. I

Thanks all for advice. Yes would love to get a 500-series TEK! A 535 (?) in particular, just before the multi-tubed Y amp version. Forgot to mention I have TEK TAS465; HP1640A and Hantek 200MHz

Hey Vince, My bet would be that if you go back to the 5VD supply, you'll find that C455 and/or C262 are shot. CR354 is also a suspect, but the bulk caps on the 5VD supply are the primaries. If you can

Hi H?kan, Thanks for allowing me to look into your file. I don't think both are the same scan. I'll PM you re. this. Re. bookmarking: You're using it to create a TOC, which can be as limited or

Yep, I have a 2430A and a couple of 11402s. I used the 2430A. I checked the + and -5 and the + and -15 volt rails. Sure enough, the +5 volt rail drops exactly 1 volt while it's happening. I'm

Got it, H?kan. Raymond