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Hi Leo, I have a 2215 wreck (very incomplete) with a transformer, will have to check. I also have a 2235 with a defective primary switcher. Never tried to repair. Contact me if interested. Raymond

Harvey is the BEST!!! I need him to download his brain and email me a copy of it! Thanks Harvey for helping everyone here!!!

Hi all, I am fighting with a 2235 PS. I previously repaired several 2213 and 2215A's, and it "always" was the primary switcher, but this time.... I removed the Power FET to apply a external 43VDC to

Personally I'd use neutral cure silicone. Hot glue gun glue is a pain to remove when you need to.

...Also what do you recommend to glue the electrolytics to each other and/or the board. They currently are mostly stuck; do I use hot glue or silicone and if so which grade is suitable?

Thanks again Harvey. I took the scope apart and pulled out the display module. Praise be, it's through hole components! It also appears that the HV section and horizontal deflection parts are all on

On Mon, Sep 21, 2020 at 08:31 AM, tgerbic wrote: > > The info in the datasheet is probably not clear because "you should not need > to know this". Based on looking at this and other family datasheets

Hi Charlie, I tried running SPC but it looks like the Acquisition board I have purchased is faulty. SPC fails and channels 3 and 4 are unstable beyond 2.5GS/s. I might re-visit the original Acq. board

Raymond, The info in the datasheet is probably not clear because "you should not need to know this". Based on looking at this and other family datasheets it seems as if the difference between the W

Hi Tony Thank you very much for your guidance. I have been looking for an image of SERVICE ROM for about 5 years without success. It is unbelievable that nobody in the group has this file. After all,

Rogerio, The Xeltek 610P will also program these. I suspect any programmer that can program a 128K battery backed RAM chip, and can be set to start at 0E hex, should be able to program the chip. You

Heitor, POST 3000 indicates that the acquisition RAM has failures. The fact that the testing took place indicates the processor, address bus, data bus and ROM should be ok. The next step would be to

Hi Jared, To change the line voltage on the TM503B simply pop out the bright grey plastic piece that is part of the line selector/power switch/power connector assembly on the back. (The piece that

Did some poking around today. Deoxit didn't change anything. I noted, however, that the linearity issue is definitely temp related. It starts out in spec, then drifts out as the instrument warms up. I

Yep done similar repairs just from the top of the board when the need arose. -Ray

Roger, I agree, probably too much hassle. I looked at the Advin website but the earliest programmer I see that specifically supports these two chips is the SpeedPro 280A. It is USB connected but does

Model numbers with a letter following the model make life a lot easier when looking up an instrument on the Internet. Take 465 vs 465B, 2265 vs 2465A. Raymond

I find it interesting that the first version of a Tek model had no letter after it, while the first version of an HP model always had an "A", which would be the second version of a Tek scope or other

Roger, The PDF schematic is a bit hard to read but you are right they are S types which, based on a 74S112 datasheet, four Clock inputs could pull 4ma each worst case for 16ma total. I think the

Hi Jared, Congratulations on finding a TM503B. "B" versions of a product are uncommon for Tek to make. They are an indication that the product sold very well. Tek was also convinced it would continue