Defpom, I think you might have overlooked something about this device, in regard to how many snubber diodes it has. Studying still frames from your video, it looks to me like there are indeed FOUR 3-terminal SMD devices marked "T", and those would be the relay coil drive transistors as you stated. Then I see TWO more 3-terminal SMD devices marked "D", and I postulate that each of those are actually dual diodes in one package, sharing a common anode or common cathode. I don't know if you already did a detailed study of the PCB traces in this regard, and might have ruled out what I am suggesting.....? I think your solution is a good one, it is what I would have done, although I probably would have preferred to add TWO outboard relays rather than move the coil control for one relay to the next one, but then your solution takes up less space in the panel. In my pre-retirement career, I used lots of OMRON stuff, but never used their micro-controler products such as this. I used many others by various other brands, such as TECO (my favorite), Siemens (the worst), Allen-Bradley (pretty decent), etc. About 10 years ago I got a good deal on the TECO ones in their OEM version (same circuits, but no case, buttons or screen....MUST program them using the software and a cable) and bought a good sized box full of them, in 4 and 8 output versions, and various input voltage versions. The cables are cheap, and TECO's simple programming software is free the last time I looked, and will run on pretty much any version of Windows. I use them from time to time, solving small control problems for friends, etc. The biggest issue I have with this type of "micro-PLC" is that invariably the software resources are inadequate to realize the full potential of the hardware. For example, I have often used these to replace older "cam timers" in old control panels. A program for such would simply be two timers per output, so a 4-output device would require at least 8 timers, and I usually found that only six timers were available, or some other stupid limitation like that. A BIIIG sin was one brand of 8-output device only had 10 timers available, no nearly enough to program separate ON and OFF times for each relay. And there are usually pretty severe limitations on how many 'contacts' can be on each 'rung' of a ladder program (or the equivalent in logic-block programming), and/or not enough rungs available to write a program of the complexity I desire. A rep from Allen-Bradley, responding to my bitching about this kind of thing, said that such limitations were deliberate, otherwise too many customers would be able to use them instead of stepping up the the next level of controller, which always costs at least 10 times as much.

the problem was. lack of maintance :)

Waste time.

Stop watching after he said that a programmable relay is a PLC. You clearly don't know the difference between PLC's and programmable relays. This kind of video should never be allowed by youtube.

I would grind out all the damaged board and let in a new bit of glass fibre. I wouldnt replace the foil in this power application just hard wire it to a new connector. There is some good old video from PACE back in the 80s on youtube. Have a go it quite fun if you dont mind getting a bit sticky with epoxy. This is how I used to repair military equipment that could not be replaced.

As Alex on Northridgefix would say: Hiroshima!

Very creative fix, Scott. Amazing how much heat an arc creates. I hope the company appreciates your work - Christmas bonus would be nice! Regards, David

That's an impressive level of damage. Haven't seen something that bad since I was repairing a lightning damaged module.

it's the capacitor, it's always the capacitor. Shit it's the relay. 🙂

As a retired electrician, i used to work with PLC's, all the relay outputs only switched a contactor, which then switched the load, things like pumps are inductive aand can pull a lot more current on start up due to inrush, Far better and cheaper to replace a contactor than a PLC, might be worth considering when you replace the PLC

Had the same, though without the flame damage, relay output just went dead. So went and borrowed the programmer, plugged it in and edited the pin assignment for that output to the last spare output on the PLC. could have fixed it as well, but a lot faster to do the 60km trip to get the programmer and return it.

Saw plenty of damage like that fixing pinball's back in the day ...

good get out of jail bodge, if you can get an identical unit, you could just swap the top boards over, the program will be held on it, i would never trust those on board relays with anything greater than signal current, and would cascade heavier relays off the outputs

The diodes are double diodes with a common cathode, on the right diode you can see a track running from the third leg to the right relay.

A pity you never got the password, the ladder logic is editable on the LCD on these things, and they are usually very short programs so could have reversed engineer pretty easily. Haven’t used ladder since the 90’s!

Good stuff! Most logical way to recover this kind of failure in a pinch.

Good catch, quite a bit of severe damage, the unused relay was a godsend. I have had similar damaged control PCBs. Usually, after removing the carbonised PCB and wired in the extensions and mods, given the area, both sides, a spray with conformal spray to make sure that there is some integrity in the PCB insulation. Hope it performed to get the compressor up and running till a better alternative can be found. I don't think you will have any luck retrieving the code. A solution would be to find some new/old stock of that model and swap the CPU board over.

A password for a password 😉 Why not.Keep the Vids up👍

I have (obviously) not run through the full 5 hours, but jumped / browsed, so maybe I missed it. I was looking forward to finding out how it does all these very precise attenuation steps with just two relays. Must be some very smart circuits in the oscillator and the section behind it.

instead of touching microscopic words on screen... is it possible to click/ drag using mouse via usb

I would love to play with mine but "it's been lost in customs", but their tracking shows it never left their facility. Just made a shipping label in the US with USPS and that's it. A month later and radio silence from them, no updates with the tracking. It never reached customs. I don't know about this company. Seems shady to me.

FNIRSI now have two new attachments. One does AAA to 18650 cells. Another has pogo probes.

About 4 months ago or so I was at the local Goodwill outlet store and scored a Voxelab Aquilar C2 printer, which is basically an Ender clone for about $10. The only thing wrong was that the hot end was burned out. Replaced that and it worked good. I was going to do the dual z upgrade. Ordered the kit and everything to do it with. Yesterday at the Goodwill outlet store I scored an Ender 3 v2 for $18. The only thing wrong with this was that it was missing 2 of the rubber feet. So now do I upgrade the Ender 3 v2 or the Voxelab, or just order another kit and upgrade both?

it can detect voltage regulator sir..? if its good or bad..?

When measuring in-circuit, the 300mV test voltage may be very useful, as it in general does not activate most transistors, diodes, etc. If the reading was flashing (moving around, changing frequently) at 600mV, you may find that the reading settles down to just one reading that hopefully is accurate. Would like a short video update for in-circuit testing at 300mV, as you unfortunately did not cover that. Thanks for your work in testing this product. I appreciate it very much.

The overworked Postal companies are Going Postal again

In the HP test gear I like how they keep a separate battery box if the batteries corrode it doesn't mess up the main unit.

Just question my quad anytone 6666 my frequency on ssb and lsb if i select the FIN function rx/tx then if select other channel i.always need to use.clarifier some advise as to why the radio is doing that from south africa 73 buddy

Hello Sir can you do a review of the test auto range tweezers to reveiw?

Noo!!! Don't leave those old batteries in there.

It’s definitely fun trying to figure out how to use these older test tool equipment lol

the meanwell adapter can be bought from digikey even cheaper than aliexpress

A problem with running a switch mode power supply under rated is they chuck out a lot more interference. When tested for CE, UL certification they are loaded almost or to max limit, which means when you run them with a headroom so as to give them an easer time they fail on emissions. How do i know, well every brick PSU I've used on a CE marked product failed without extra ferrites on the output leads and/or mains input. But I do try to get Meanwell psu for home use as they do come over as being well made and long lasting. but i would only buy from the likes of CPC, Farnell or RS etc so you know what your getting.

If it makes you feel any better (it won't) the US Postal Service, UPS, FedEx, etc. treat our packages the same. -mailman bitched at me because he delivered my package to other people on a different road that has the same last name. -UPS destroyed a $6000 motor drive while on its way to the local facility. Looked like it was ran over by a truck but they said I improperly packaged it and refused the insurance claim.

Love how his cat got excited about him doing a repair video on the fluke

With all the rack mounted equipment you've acquired, you need a cabinet with rack mounts and a long power strip. 😀

The post man/woman must really like you 😂

You put all new chicken-head knobs on and didn't mention it at all.

Hi, I bought one of these and it stopped working after about three weeks. Similar issue, with the screen fading to white. I took out all the boards and didnt fancy spending the next year trying to work out what was going wrong. When you narrowed down the issue to that one board, I decided to have a look. Turns out my board was different and didn't have the same diode that you found in a reversed position. I checked around and found the little CR1220 3V battery was dead. Replaced it temporarily with a CR2303 (Bios battery) and that got it back to life. Thank you.

if you don't want them I buy them off you give me 25. I can't get them from the net do parts suppliers sell them like farnell?

Very annoying, when you say "UF". It's µF - the letter "µ" is pronounced "micro", so micro F or micro Farads. It has nothing to do with "U"

Upon "updating" my Launch 123E it caused the screen to freeze after appearing to start up normally. Now it is useless. There is no way to reboot it, like a pin hole that even cheap devices have. All I can advise is to avoid updating if you want to keep the basic functionality on this example of lousy design.

I am kind of surprised that you went through the work of adding a transformer inside the unit to drop the voltage. I would have installed a polarized 120VAC plug cord on it, and then, got a larger 240VAC to 120VAC transformer and had it as a dedicated power source for any more 120VAC devices you might encounter. If you got a primary / secondary isolation transformer instead of a cheaper autotransformer, that would also be another level of safety for working on 120VAC units.

Thanks for showing us what's inside an Apple lightning cable! Very much appreciated!

Привет снова! Хочу получить свой первый fluke но не могу определить какой выбираю между 117 и 175 вы имели дело с двумя, какой из них вы можете рекомендовать и по чему! У меня уже есть иные измерители включая BM869s но это будет первый fluke! Благодарю!

That is a lifetime supply of Loctite.

Nice work and making it better for the future is great :)

I don't like to just tack two wires together without some sort of mechanical joint. My recommendation is to use a non insulated butt splice and use a piece of heat shrink tubing for insulation, that makes a good mechanical and electrical connection.

Fuse 100ma slow blow will last a long time, it will just be better against surviving the initial inrush current.

Might be worth adding a label onto the front panel "Do not leave plugged in".