Відео

Supercool

re soldering "iron", as a wise one once said 'all ways are good, except the bad ones"

WHY DO HP LAPTOPS HAVE THIS PROBLEM

Thanks. Btw I love your Soviet era soldering gun. Nice.

For measuring points you don't have access to you can solder thin wires to those points and then measure them when it's assembled and working.

Don't run the thing for too long without a case on, or the airflow from the fan won't reach the ceramic hybrids, they will overheat, expand, contract, and the solder joints of the relays will crack. Ask me how I know... Btw, try to run the Signal Path Calibration. If it succeeds, it will compensate and calibrate all channels (e.g., weird offsets, tiny differences in amplitude, etc.) and confirm the scope signal path is 100% working. If SPC fails, there may be some lingering problem in the hybrids (or somewhere else on the bottom board) and a reflow of the solder joints goes a long way. Also, there are scripts that you can put on a floppy to hack it with all options, but it seems you already have most of them. Nice donation though, particularly because the most expensive part is the 4 probes...

14:56 _"One day I should make an autopsy of some optocoupler too"_ Yes please. I searched your videos and it doesn't look like you've done one. It would be interesting to see a comparison between cheap and quality ones.

Bro sounds like when you rewind a video tape on x2 speed

4:44 “Are you kidding me???” Never gets old! XD

👍👍👍👍👍

These Dallas chips was commonly used as integrated RTC chips for (mailny cheap variants....) AT PC's clones, from 286 era, up to end of 486 era - later Pentium mainboards had in general RTC constructed in other way, and utilized in 90% of PC's much more modern chip, and CR2032 coincell baterry as a backup.... And yes - these Dallas abominations, had INTEGRATED coincell battery inside (technically this is not even a IC, this is PCB with battery, chip, some passives, melted in black resin/plastic...). Nowadays practically every of that Dallases are flat... Some devices, refuses to boot when this RTC battery inside is flat, and spares for this Dallas is nowadays very weak available - and nobody knows how long will work, because these coincells have some lifespan, even not in use. Fortunatelly, there is some modern projects, to replace this with chip + battery holder. There is possible too, to drill a hole in this (yes!), and solder wires for "external power", but.. this is a litte bit "ghetto mod" ;) Greetings from Poland.

I am the guy who is screaming about your soviet era nuclear plant soldering iron😂 . I like your videos mr wild diode, also your crazy soldering iron. Say hi to your lovely cat....

Bloody interesting!

11:08 i used to explore faulty driver for 22W philips industrial LED lamp, it has non-sync buck topology (w\o pfc) with UF54xx diode, and the fault reason was overheating of this diode lead to bloating of output electrolytic cap and bloody roasted to black pcb, so diode in 150W driver may cause quick house-burning event) its seems to be exactly conduction losses, coz mosfet body diode has even worse reverse-recovery time than diodes in continuous current mode. its also kinda funny that driver design has temperature-protecting circuitry but it was omitted)

40 minutes well spend. This length is no problem at all.

It is amazing that scope was working with that big skid mark burn in the board it had.

Fnirsi требует сохранения настроек. FDD 3.5" проверили?. Лучше снимки экрана использовать. Тёмное стекло вместо фильтра. Может проще LCD монитор встроить?.

But these oscilloscope have an VGA output connector I believe, you can reuse it to replace the CRT or just use with an external monitor.

Great work, well done. Although it is a shame to now be just black and white, that shutter took so much light I'd just bin it and move on. If it was me I'd get some clear acrylic sheet and cut a piece to stick inside the front bezel and just leave it at that.

Similar pain is to work on car radios or multi media systems because of the compact design. 😕

There were comments to do lcd mod. This crt is for 90% vga monitor

Corona OK, WTF IS THAT 🤣 I think that it means the corona discharge of the CRT but still funny 😂

There are two type of videos you need to do. One is an SMD soldering tutorial with a gun soldering iron. The other is some political discussion about the current issues in Europe.

please do another episode

yo real expert thanks.

We need more scope content

Nice video sir please continue making long videos :)

Ďakujem za ďalší diel z tejto zaujímavej série, kľudne v nej môžeš pokračovať a rád sa pozriem aj na ďalšie diely, ak ich natočíš. Ale pekne si ten osciloskop dal dohromady, teraz ti môže pekne slúžiť a štvorkanálový digitálny osciloskop, to je aj dnes dosť drahá záležitosť a takto si aspoň získal pekný kúsok do dielne.

nice video u didn't test the vga output to see the quality and the resolution of the picture .

That LCD module itself is clearly bad ,it shouln'd be spotty like that

glasslinger has a vidio about back uping this kind ossiloscope cheaps.

Hi Daniel, you're making great progress on this restoration. Nice to watch it, many thanks for posting. If you're interested to read of a previous restoration of the LCD shutter, just search for "TDS 744A colour shutter - TekScopes". This will take you to the TekScopes topic: a replacement (cheaper) can be fitted if necessary. You can also follow the link under "JOSE V. GAVILA". Good luck! Kind regards.

And then, for something completely different, he brings in a thorium mantle and geiger counter!

"Changing these crapacitors..." lol

That is the most italian english accent I've ever heard

You can connect an external monitor to make it even more cumbersome! 😂

Is it instantly posting the wave forms on Instagram? 😂

Still a good score. 500MHz is not cheap even technology changed a bit. I am still fixing my 100MHz Hitachi analog.

you and @ThePostApocalypticInventor should do a project together video

This is @ThePostApocalypticInventor Approved 😉

You could check if there is possible to find a composite video signal along with chroma and luma, maybe with that You can generate video signal for external monitor. at that moment there is unclear if color generator circuit is working

Even showing the reasonable capacitances but high ESR might be intended?, or replacing with low ESR ones causes any inrush ?

you talk like a recording played backwards

All the way to the end .. I'm as daft as you are .. 😜

14:35 oh hey, welcome to the future

I like your SMD soldering gun.

ЖК кристаллы возможно уже просто потекли со временем. Так что эта штука в любом случае под замену. Были у меня часы старые с ЖК экраном - так вот, он так потёк, что полностью перестал работать. Клей в старых ЖК экранах со временем разложился и всё. Кина не будет.

lol @ 8:45 you know me too well.

Maybe a cheap LCD display running from the VGA output would look OK.

UA-camr Necroware did a great video on reworking those old RTC modules - ua-cam.com/video/ecTZtZhE9bI/v-deo.html He removes the chip and soldered in cell and crystal and replaces them with a battery socket. Also a good idea to solder a socket into the board while you're at it.