Great video

Great video, you only forgot to explain the meaning of transistors gain...

I think you are right about the caps but could this be an opportunity to demo the value of a scope checking cleanliness of supply voltages and activity on the controller chips? I appreciate a good working one as reference would be a benefit 😀 Keep up the great work 😀👍

You should maybe remove the bit where you chuck the customers board 😅

*If you are intetrested to know how the ESR meter finds the short in a VRM so easily* kzfaq.info/get/bejne/lah1dtmL2prWh6c.html

I work predominantly on test equipment and industrial boards. It's common for manufacturers to use part numbers that obscure the parts origin. and have custom silk screening done so that the only numbers visible to cross-reference lead back to their replacement parts program. That way you need a service tech from their company to fix it. Its getting more common but it's been like that for a long time. If you can find a way to cross reference it with other numbers... Or find a hidden number on the board. And sometimes they take a standard common part characters before or after it, to make it harder to cross referance the original part number. Similar practices are done with IC chip markings and such. They tale a super common part and change the identifying information so that you can't replace it without them. Or hide an original part number under a heat sink or something like that. Just a thought.

My transistor has a hardon when i tickle its base with .06v

Made me jump when you quickly dropped that motherboard lol. Probably not more than you jumped though! 😆

More, please!

Great to see you analyse faults... Given me some ideas can't wait for part 3!

Barcrest Triple 7 dfi Itox motherboards well known and documented failure within the fruit machine community.

Hi, I don't understand why the resistance readings you got on the MOSFETs imply that the VRM controller is faulty. What insight am I missing?

Extremely great channel

Since you replaced the mosfets, I would have at least tested the board to see if the symptoms changed at all. A quick test shouldn’t damage anything, right?

I believe these boards are used in gaming fruit machines. If you can find a solution to the not booting problem you might be onto a good earner with these boards.

wow super 🥰🥰🥰

looking forward to Pt 3!

you could of just took the controler of the last board and put it in the other board and see what happens... you can replace the controler again when you got the parts in !!!! but that is my view on it...

Regarding marrying software to hardware, there are people doing BIG business nowadays cracking that stuff and removing the checks so any standard hardware works. He may want to look into that...

Having motherboards tied to software is a very, very common thing nowadays in order to artificially apply planned obsolescence. It's very common in arcade games now which are all PC-based and it's only going to get worse so get used to it. Pretty funny really, my old Space Invaders board from 1979 is still working and is easy to fix no matter what's wrong with it yet a game made just 2 years ago is already dead. Quite sad how companies have self-destructed.

has to be a square grid cant have a circular grid LOL

those motherboards are for use in fruit machines

Being an industrial motherboard, you might find that the 2 molex's on the board are actually outputs for powering hard drives etc. In my experience anyway. Not sure if connecting them to a PSU would cause issues.

😍😍😍😍😍

Extremely great channel

One of my electronic technology professors from 80s once told me, "Jim the difference between you, the electronics technician and a replace and repair tech (R and R tech) is what he called them in the field is that you repair at component level. The R and R is a card changer." He went on to say something like, Card changers are fast and they save the company money, but you can change a card and repair it during up time to have on hand. Who will save the company the most money? Now days with micro and nano technology the fanufacturing industries insist on eliminating electronic technicians. The want card changers and creating more waste. Thats sadly enough the way our society has become. No time to slow down and enjoy what we have. It's Out with the old, in with the new, and most of the time, before the new even gets old.

*Part two is ready to publish tomorrow*

Absolutely love this video, I know what I'm making this weekend. I've already built 3 V-I curve tracers, but being able to convert one to a 'Huntron' type will be superb. I thanks you most sincerely for sharing your knowledge.

Are the various types of amplifiers used in different types of audio systems ? I.e. do top end equipment use a certain type due to the better quality output, compared to a cheap and chearful set up ? So that you could look at the circuit and know what sort of quality the product is.

I would have connected a speaker too for beep codes.

To put that amount of functionality into something and still allow it to be produced and sold with basic spelling errors speaks volumes, IMHO... Unless of course this is a pre-production 'beta' model sent to Rich in order to discover such issues! :)

Three for one... ohh no,, two videos😭😭 Richard use the force then could be two🎇🎇🎇

Those motherboards seem to be quite rare. Only got 1 hit when searching online from a guy on badcaps forum who uses these boards to run a fruit machine. He says they are made by DFI.

Heya, 3 MB that is triple tasking lol. can't wait for part 2 😏 maybe part 3 !!!!

Might be outside of your area, I don't know... For that customer it may be worth suggesting a Physical to Virtual conversion of the running OS - they clearly value having the software remain available to them. I've seen software vendor locks as rudimentary as the MAC address of the NIC.

Your video showcases the true essence of storytelling. Mesmerizing!

One of the big take-aways for all of your tutorials, Rich, is the persistent checking of the the test equipment to make sure the reading you are seeing isn't a result of the device but the item under test. I feel this is an critical part of the testing process that novices (including me!) tend to forget. Many thanks from Australia.

MOSFETS act just as the old values do- a field device (that's my understanding.)

The two prong plug you are showing does NOT have a ground. It has a NEUTRAL and HOT. Just sayin'.

My unit came as the new casing, and I certainly agree that it's great! I like it. The buttons are nice and responsive.

Please connect the input of the second channel oscilloscope to the signal generator. In my 2C53P, the second channel displays the signal frequency correctly (whether it is errors in the program or schematic errors, it is not yet clear) over the entire frequency range. There are 2 disadvantages in my FNIRSI 2C53P instance - incorrect display of the signal frequency by the first channel and a rather strong underestimation of the multimeter readings in the capacitance measurement mode. Otherwise, it is a pretty good and easy-to-use device.

You're the former mobile disco guy. Shouldn't you know what funcation is? 😉

Heya, oke thanks for the review but this is not gone be the 1

Kerry Wong just reviewed this and came to the same conclusion as you, that until the software is fixed it's not worth buying, He went into a tiny bit more detail than you and just got himself more and more disappointed and a bit more cross than you ! Lol ! you dodged a bullet. Also like you he pointed out that they make some great stuff and found this confusing as to why it exists !...cheers.

probably mispelt function, funcation lol

Great review! Exactly what I was looking for, thank you. 👍🏻

been looking for a video just like this for weeks now, this is amazing. You explain everything in a way that makes understanding it intuitive. Thank you legend.

On the function generator, I didn’t see that you can have modulation (AM, FM, etc).

after looking at other revew videos of this ocilloscope it looks to me like the one you got has some sort of software problem. it looks like you got the v1.5 software but the latest version is v1.7,maybe you can update the ocilloscope to a different version of the software.

yeah, Richard... When it comes to the second pressing of the touchscreen, I believe that it is to make sure that you want that function, kind of giving you a second chance to check your wiring, to make sure you will not damage the device. It also could be used in a way possibly like an on and off... Method, let's say you have your leads set up in a certain way.... Until you hit that screen function the 2nd time you won't get the meter to respond. I guess I'm comparing it to how some power supplies work... You get everything set up and adjusted and then you press a button and the power supply delivers power. As far as the finicky behavior, I'm seeing some possibilities that their may be some calibration problems... Look, I worked in a factory where I produced a product and some people just didn't quite understand what they were calibrating but they could do the Job like a robot 🙂 but not truly understanding the potential complexity of doing the calibration process which in this case would result in odd behavior and in accurate readings, I am just giving my two cents and trying to analyze kind of what I'm seeing, we saw some readings that were quite far off, but the function kind of seem to work. I hope FNIRSI will reevaluate their manufacturing process, and monitor the quality control in the final output of the product. That's manufacturing speak for... Knowledgeable people checking the product before it ships for errors in manufacturing and calibration to meet the intended goals of the product. These guys generally make good products. I also see some software as you pointed out where the words are kind of poor English kind of a thing maybe it's a translation issue, but that should have been resolved before the product was shipped, But, again reviewers like you feed input to the company to improve the product I hope they give this product to review because it certainly has potential.