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Olá, After getting the LV rails in order on this old scope, there is no vertical deflection. The trace sweeps horizontally just fine. Looking in the service manual, and following the

Just reposting... "I upgraded my Tek 2232 scope from the X-Y plotter to GPIB, so I have a G-8688-04 plotter board with trim panel and mounting hardware. The x-y plot module is in pretty perfect

A quick off Tek topic question... I have mostly legacy Tek gear, a couple of scopes, two spectrum analyzer, a TDR and a bunch of 500 modules and frames. Archived documentation is available and this

James: I'm glad that my suggestion helped you somewhat with your 455.? Your issues with the vertical deflection could be just about anything, but start by doing a visual check (and maybe a "wiggle

Hi Harvey, Yes, that does help to clarify the situation. I've still only tried this technique on ram-packed boards, which can just blend into a blurry multitude of components if you so as much

Nice one for the heads-up. Those two were indeed at fault and were replaced today. C582 with an electrolytic and C584 with a mylar (which I had never thought of doing before). All voltages are now

As to the issue with the plugin, it has me rather baffled. Been thinking about pulling my good 3B3 from the 564B, and literally comparing them to see if anything is different. The two plugins are not

Sorry for the late response. Ozan is correct. The bottom two traces are overlayed within 0.2 divisions to 1.2 divisions per the instructions. They typically are centered on the display. That's how

I would start checking TP901 to make sure it goes to +10V quickly and stays there. TP912 should be moving around for setting each voltage but shouldn't be too far off from +/- 1.71V across all the

I believe the intention of the calibration step is to match two zoomed B-sweep waveforms on top of each other for the best calibration accuracy. That is how I calibrated my 2467B few years back and

Hi Ozan, Have narrowed it down to the level amps on Sheets 1-4. So yes, the levels on TP1402 etc are changing along with the trace drift. From a cold switch-on, the level on pin 3 of U943, as an

496A ??? 496P maybe?

Thank you for the response Jim. Yes, I've another 3B3. I use it in my 564B, and of course, it sweeps correctly. The 3B3 in the 564B works well, just pretty beat up. The one I'm working on is much

Thanks, Jean-Paul. I found the following link in one of the EEVBLOG posts. Is it the one you were thinking of? https://www.wb0smx.net/2022/04/tektronix-2465a-oscilloscope-repair_26.html It has

Do you have another time base that tracks correctly, Left to Right? If not, it's possible that the wires to the horizontal deflection plate pins have been swapped. That would be an easy fix. If you

Kim do you mean a TR503 tracking generator? Jeff -- Jeffeelcr

Hello again, there was a video or diagrams on the techniques perhaps not on tekscopes but EEVBLOG. Search entre forum, as several categories may have it, https://www.eevblog.com/forum/ Jon As

Spot on. Both have failed impressively. Appreciated

Lock-in amplifiers are very cool. Single phase versions require phase adjustment to peak up the reading whereas dual phase versions with two phase sensitive detectors in quadrature do this

The vintageTEK Museum has a tested part, pulled from a parts unit. $10 plus shipping. Where are you? If you're in the EU, QService might be a better choice if they have one in stock. -- Bob Haas