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If the 5V/div range is also faulty, my guess would be the *10 attenuator. Have you tried applying a signal to the faulty channel's input, and using the /other/ channel to follow the signal forward

When the EHT transformer is connected to the 25kHz HV drive, then pin 13 on the control IC hits 0V pretty much immediately after the inverter starts causing a shutdown after 10mS. Anything below +50mV

The fingers are gold plated and looked very clean before I IPA'd them. Is there anything else in the circuit that could be causing the problem? Here is the relevant page from the service manual:

Thanks for the help, all. I have a lead on the 2216 service manual. The 2216 operators manual is at the vintage tek museum website. It will be interesting to see how much the 2212 and the 2216 have in

Fair enough -if the contacts are gold then there won't be corrosion and IPA is just fine. I've wrestled with lots of silver plated tube sockets and connectors and there Deoxit and NevrDull are really

I may be wrong, but if this is in regards to the attenuator fingers, I think they're gold plated so no corrosion should be present and only cleaning with IPA is necessary/recommended. Thanks, Barry -

Let us all know how that turns out that one for $55 looked very clean at first glance Hi, when I got the 7B15, it looked very clean and had no shorts, but no function as well. After a "quart" of IPA,

Hi, just clean the contacs of the input attenuator with IPA. There is a video on youtube showing how to clean them on a Tek 485, but that procedure is absolutely the same. -- Best regards, Fred S.

If you need to clean switches I don't find Isopropyl Alcohol (IPA)does a great job. I use the Deoxit products from CAIG. https://caig.com/ They have products for cleaning switches Deoxit D series and

Hey Bill, you might try to ping the Vintage Tek museum folks and see whether they have the service manual on fiche. There's a tentative index of the instruments covered in this posting:

Caig fader lube had a name change to deoxit fader lube a few years back. Terrific product designed specifically for this task. There also a product for cleaning switch contacts deoxit D5. Also

Jim, My post was relating to Bill K7WXW's earlier post (see below). I don't own a 2216; I was just trying to help. I don't know if your suggestion has possibilities or not.... Colin.

Hello Ingo, while I do not know to 100 percent, I think they should be compatible. Afaik, the color Palette of the DPO / InstaVue actually is quite limited - Danaher accomplished the trick via Palette

Hi all, I am trying to get my 465 scope repaired. CH2 has a problem where I get a flat-line (with some noise - signal is the calibration square wave) when set to the 50mv/100mv/200mv ranges. This is

I hope you mean brake cleaner, as brake fluid comes in two types, neither of which seem good for inside of potentiometers....? one Glycol based and the other a synthetic base both with a viscosity

I rocked the horizontal and vertical controls until my fingers and wrist got sore while passing the time with some EEV blog videos, problem resolved and the stickiness has gone away, thanks for all

A better cleaner for pots is Caig Faderlube. It has a little lubricant in it and will not attack the resistance strips. Also works on wire wound pots. Another place to get dry IPA is at a computer

Another vote for Deoxit products, always had good experiences with them.

Deoxit D5 or DN5 followed by fader lube is what I do. The D5 gives it a good washout and the fader lube adds some lube hence the lube part of the name.

I am in central Arkansas about 75 miles NNE of Little Rock. Pretty much the middle of nowhere. That's the good part and the bad part. Color display is a non-issue. I care about the DAQ and