my 2235 has an intermittent contact when I select the XY mode (for my home-made curve tracer) Was wondering how difficult is to get access to selector for giving it a shot of deoxit adri ----- Messagg

@Rogerio : had the same problem with my 2710, I tried the fix but it didn't work with my unit It was many years ago, in the end I sold the failing 2710 and bought a 2712 Anyway the schematics of the f

if the caps have leaked, the solder joint is oxydated and won't melt at ordinary soldering temps You will need a much higher temp (and a longer time) and that will lift the pad The method of grabbing

hi Laura, tried your procedure to no avail While I was there I also tried the so called EXERCISER 03 (EAROM clearing) described at page 6-16 of the manual ( both in CAL/NO CAL position) : also to no a

thanks Bill, you did it after procuring all the equipments as per the service manual ? adri

thanks Laura, I'll try your procedure and report back adri

after a partial recap, following the explosion of one of the two infamous Wima capacitors, I noticed on my 2465 a line of dots in the lower part of display, exactly as described by another member some

Raymond, I'm in Italy, so little hope to find the part locally It would be great if you could send them to me Are they working or in unknown state ? (BTW I bought my 520 - as a non working unit - on e

So Adri has traced this down now to two stuck bits, A1 and A6 on the CH2 are resting at -5V. > yes, after having spent a good amount of hours (and $$ for the initial investment) I came to the conclusi

Siggi, first of all, let me say a big thank you for your help with this difficult diagnose :-); now back to the problem: I have checked every single line from VEEB to TP110 ... TP125: they are all OK

same for the data lines CH2B0...CH2B7 I measure 82.5 ohm from each pin of U700 and the correspondent of U100

hi Siggi, just checked pin-to-pin traces continuity between U700 and U100 (CH2A0 ...CH2A7) No problem , they are all correctly connected through 82.5 ohm resistors ...

thanks Siggi, today I' m on duty with the family - tomorrow hope to go back to the problem TekScopes@...> ha scritto:

Siggi , great analysis ! Thanks the scope , in the 1.259V picture was running at 250Ms/sec (being an internal "noise" hence not triggerable,I had to stop the sampling to take a photo) The SRAM are the

pics are in the folder

hi Siggi I confirm that the "noise" can be reproduced with DC at the input Of course the DC threshold at which the noise starts depends on the attenuator setting (I set it at 1 V/div) Thresholds asimm

wow Siggi ! I'm going to check the beast with a varying DC on CH2 Will post the pics in the album

hi Siggi, many thanks for your post I have uploaded in the PHOTO section a album (TDS520_adri) with several photos of the CH2, each one taken with different timbase and with ET turned off Only the 5ns

forgot to say that the unit passes the self test at boot-up and the SPC error log now is very much reduced, compared the the beginning Here it is error log.jpg https://www.dropbox.com/s/5yx9u33np3uxt9

after a long work of washing, drying, rebuiding eaten tracks etc with the help of ArtekMedia CLIPS I've been able to revive my TDS520 however a few problems remain ; the most serious one affects, to v