As someone still learning, I appreciate the quicker format. I don’t feel so overwhelmed with knowledge. Then when I’m ready to dive deeper, it’s good to know the longer format will still be available. Much love and many thanks from Dayton Ohio USA!

Dude ... we just love your content ... your jokes the knowledge your passing on.... your amazing man I don't care how long or short the video is I'm watching

I absolutely love this kind of content. This guy def knows how to convert technical information into a digestive visual conversion for understanding. Amazing job!

I have fixed hundreds of car amps back in the day and even built a few for fun but this was a new one for me. Nice catch on the freq problem! 8~D

Excellent job, I understand how the power supply works a little better now. Thankyou sir

WOW, SUCH A VERY GOOD AND VERY INFORMATIVE VIDEO BRO, KEEP THAT UP, YOU NEVER KNOW HOW, OR WHO YOUR VIDEOS MAY HELP, YOU ALSO MAY NOT REALIZE JUST HOW IMPORTANT YOUR KNOWLEDGE MAY BE! THANKS ALOT!

Great info, great diagnostics, shame about the soldering iron! Weller WSP 80 s/iron + PU81 PSU is the way to go.

i bet there is no one else that repairs amps so intresting.. good...knows what he's doing..then this guy... big power up💪👌 el maestro.. greats fr 🇦🇼

Love the short format but don't stop the streams - great sense of community and interaction in those = perhaps chop them into short format videos after the stream

Sam I like the full live videos but like the shorter edited versions also with the shorter edited versions im able to watch and learn much more.

Interesting video! I've seen board flexing do weird things with bad components. Your video reminded me to check the components in a video processing oscillator (2 mhz) for bad caps and resistors! Heating the oscillator IC did change the frequency and flexing the board made it go absolutely nuts; but I don't know that it wasn't one of the external oscillator components close by. So I'll check. Thank you!

First video I've had recommended from your channel, what a strange failure mode and very interesting!

I have always been fascinated with electronics and especially car audio equipment. I really appreciate that you go into such detail about what is going on with each and every capacitor and resistor as well as anything else that you believe is the problem with the amplifier. What would you suggest buying for someone such as myself that would like to start building up the equipment to do what you do ?

Great job Sam very educational keep up the good work Sir nuff respect 👍🇯🇲 🇺🇸

Watching on my xbox, commenting on my tab. Love your vids!

Ok I am a 50 yo old school Radio Shack employee from the 80's I spent way too much time exploding RS electronics, and probably had impact on the demise of the company. LOVE the perfect CB flex description of "wooohh, whooh" Also props for the spot on poof and pop description. I popped that thumbs up and poped the bell Plus LOVE the Audison. WANT

Sam is the #1 amp guy

Thanks for the ongoing learning, it's awesome 👍🏼

love your videos Sam!

Planned negligence, love it 😀

What an interesting failure. I loved the small journey to the failure.

we will take whatever we can get sam :) haha i like what you do regardless of the format

This is the first video I've seen of yours and its a very good video but I thought I had my video on 2x speed 🤣

Great video!

And again a very informative video. keep up the good work!! thanks alot

I learned something new . Thank you !

love your vids n new to channel.can anyone just send your amplifier to you for repair?I'm from Brooklyn NY n out here they don't show love for what they do like you do all they care about is money so I would rather prefer to send my amplifiers away to get repaired the right way and not worry about whether or not I'm going to screwed over on the job well done.

Man, your a freakin genius!!

Great video want to see more amp repair.

We need a REMIX of this. Something with the Swedish chef, the dude from Hell's Kitchen, and PhotoInduction and Friends. " POPPED IT!" 😆

Mint Thumbnail 👌

Nice work. 😎👍👍

Like this format.....

Love the sound effects lol

I enjoy the quicker format I've been working through the list of them

I like both the live streams and these short formats. That said I prefer the live streams

I'm seeing this late so I hope you read this @barevids I might have a tip for you from an old repair tech my father worked with about 10 yrs ago. I'll spare the full story, but he found an easy way to repair surface mount solder issues. Stick the board in the Oven at just high enough heat to melt the solder. The components won't be damaged at those Temps, and the solder won't run when it's just barely melting. He could repair half a dozen printer boards an hour that way! Looks as though that amp could use an Oven Spa treatment to reseal ALL of its solder joints. I don't recall the Temps he was using but I'm confident you already know that info. I did Audio/Visual install work so I know enough about soldering but never needed more than the basics, and I never did board work.

I can attest to the loud pop they make when you short out the HV rails. One of the ground clips for my scope looks like it touched off on a welder. Surprisingly the scope and amplifier survived the ordeal of me forgetting what was clipped to what.

I'm new to watching you, but I must say I really enjoy it, your accent to layman's knowledge. I'm getting back into car audio due to poor installation in my vehicle, hence cutting wiring when could've used harness adapter. which is to this,I purchased a deaf bonce aab 1000.2, straight out of the box all lights flashing with just power, ground and remote hooked up, an piss poor customer service for return, think something similar to the audison issue ??

Multi-Layer Caps don't like being banged around much. Anytime you see an oscillator act like this in something like a car, replace the MLC controlling it, the cap is likely cracked on the inside.

Either or whatever you do I'm watching

something tells me it is possible for a fet failure to destroy the pwm chip by a short to the gate then it fries the gate driver witch shorts back up the line to the pwm chip. the only thing i think that can stop a cascade failure like that is a gate transformer as the signal is isolated so you would blow the winding before it can short to the pwm chip manufacturers could cut their costs by doing a walmart working their employees off the clock. as soon as they punch out they go oh we need you to clean the bathroom sink. go back to using lead solder and just put a warning in the product for you to recycle it rather than to landfill it and take a page from car batteries where there is a core charge to encourage returning of old stuff. and set up a cap and trade system to allow the use of lead solder.

Like it a lot!

13:30 looking for a fraction from a second away and it jumped up to 185khz and back

What's your favorite solder/flux? I have some go-to's but I'm curious what yours are! Lead free solder ends up being terrible for repairs

Had an amp pop so loud it was like a gun shot 1 of the small caps had burst literally vaporised only the outer can left and dust cleaned the board put a match rated cap in and amp worked fine for 8 yrs after

Frequency of tl494: Fosc = 1 / (Rt * Ct)

So withe the powersuply blowing up "not a loud pop lots of heat smoke instantly" what does that internally? Like i had plugged it into a power suply and it triped the circuit shuting it off not blowing it. But then plug it to a 12vt car batt and instantly it poped in smoke. What makes that happen? As to this amp had the brand new smell and everything looked sexy but obvs wasnt the case aha. And if my power suply side died would that have caused mosfets to die as well? Is it worth keeping and fixi g up or is it all gunna be toast?

Cheers

What brand flux you use here, and if you can send a link to where you buy it. BTW is it stable with the hot air gun, some flux i use just liqify and run away or dried up under the heat gun.

nice bit opf logical fault finding

The gigantic solder blob on your desk under the power supply section probably isn't doing you any favors ;)

i like this style better feel like i can take in the knowledge better.

👌🏾

Commonly would be transistor failure that would have blown the fuse or any short circuits on the logic side

Quick question! I have a DD M4b works flawless but one of the tiffany RCA jacks is really finicky. Where can I find a replacement ?

I never seen a soldering job with so many letter “I”.

How does one determine the capacitor value of unmarked SMD capacitors? My DMM has never been able to give me a consistent value when measuring them out of curcuit.

It's not A/C switching , in the power supply it a DC TO DC converter which makes a pulsating DC wave above ground reference. The frequency t increases and decreases ) creates the duty cycle based on the load on the output voltage of the transformer

me: 118kHz? that's quite low Sam: absolutely preposterously large me: wait.. what? *as a context, i ran my prototype supply board at 250kHz

My sundown salt 8 just did that . What causes it

I had an old kenwood amp do this. I thought the transformer was cooked at first.

what is your pricing estimated on reparing an amp

When you put your thumb on that long black Chip I saw it clicking to protect mode and then when you removed your thumb the red light went off

@Barevids or Anyone, curious on opinions of Seismic Audio amps. I'm looking to buy their SA 250.4LH its a Class D 4 channel amp. With really nice crossovers and four 35amp fuses(140amps total) on the board. Its rated 375 watts RMS per channel but I figure its probably closer to 350. If anyone has a Seismic Audio amp love or hate story lmk. If you got an opinion on them lmk I'm curious. It looks like a solid amp.

On overclocking PC motherboards it's not uncommon to be able to choose up to 500khz switching frequency in bios.

I has one of those. Goodampers

Are you related to Photoinduction? You both sound the same :D

Can I have info I need some amplifier fixed

Why didnt you measure the cap, make a note and see if its dependent on resistor theres a trend of calculated value thats consistent based on various amp design?

They need to bring lead solder back. As long as we don't breath it or eat it we are fine. The new solder is unreliable. Question. Can you get into trouble repairing Rohs solder with 63/37 tin/lead solder?

If you try to drive a tranny to fast, it will simply stay on. The driver may have made a shorted h-bridge by failing that way.

Early.... For moment I thought you a red bra on 😂😂

Longer!!!!!!!!!!!!!!!

Yeah lead free solder sucks. I get that it is an environmental and health concern but people aren't going to be chewing on amp boards. If they are then we have bigger problems then a little bit of leaded solder.

Been soldering for over 30yrs. PCBs, cable components, etc. I HATE Lead free solder. Unreliable to perform consistently even with consistent soldering techniques and temps. I refuse to use it unless the customer insisted and accepted the fail risk.