Modeling Amp Repair Job? NO THANKS.
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- เผยแพร่เมื่อ 30 ก.ย. 2024
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I don’t blame you. I have one too. When it goes out I suppose I’ll have a nice cabinet to put something else into.
SMDs in a f**kn' _AMP_ !!!
One, invisible fracture and you have a door stop instead of an amp. And what do pc boards hate more than anything (especially SMD)?
1: Heat
2: Vibration
Just strap your laptop to the engine well of your car, and take a bet to see how long it lasts. That's how stupid these designs are. I hate the fact that they charge good people to get an established name brand, sometimes a particular model (Like Fender does). And what they get is a weak,disposable product. Anything is only as strong as it's weakest component. Anything.
Its fun to deal with digital circuts, yes, you need a good microscope, soldering station and digital scope, but sometimes its even easier (and cheaper) then repair a tube amp. Real troubles becomes only when you have failed firmware or custom proprietary dsp ic
Why are people so scared to work on things with ICs? ha. IC's honestly hardly EVER go bad.. its usually a cold solder joint, or a loose wire connection with these types of electronics. Not saying they are better, cause they DEF arent lol, but just not a whole lot of parts that fail on them. Now things with BGA chips on the other hand... haha those are a PINA to fix lol.
BGA should be illegal outside of smartphones etc. too much like a built-in monopoly
@@Craig_Hilbig I totally agree haha, all those types of chips should just be PGA, at least they would be easily replaceable, but yeah thats the idea i guess is they arent easily replaceable lol SUPER lame
because they're super small, and some of us old guys can't solder anything smaller than a regular DIP chip
From my limited experience, most failures in electronics is in the power section. Not the complex stuff. Either the output or the power supply. If you can get your hands on a broken one with minimal risk, try it. I think you'll find "the more things change, the more they stay the same" - AKA same stupid stuff.
Modeling amps are basically garbage to me. All my amps are tube driven.
LoL, no amp tech would be willingly will trouble shoot and work on one of these newfangled disposable modeling amps. If someone really loved it, it would end up being much cheaper to just acquire another working used version for a couple hundred bucks, and then rock it until it’s wheels also fall off in due course…8)
Too many people who works on amps can only do simple basic work. It's a monkey see, monkey do. If you can't fault find a simple board like this, you're not an electrician.
Smart call, if it has IC's and PCBoards I dont touch them.
Sometimes I'll look into it and it's obvious a resistor is burnt or electrolytic is fried and it's a simple fixed but if that doesn't fix it, sorry.
Brad the digital sections to repair them they just throw entire new boards at them, no replacing caps or anything, just plug in a new one
The actual obstacle is probably like a line 6 I looked at, company will not supply you with tech data to work on them. But I would still take a look as it is just as likely to be simple, versus some kind of exotic digital problem. A tossup. Just don't make any guarantees to customer.
He'd be better off taking it to a computer repair shop.
Actually, that was the first Vox modeling amp line made & maybe the best sounding of all modeling amps since. My amp gear since 1980 is a 79 JMP50 Marshall combo & and a real vintage blackface 65 Fender Twin.
I have a real black face 1967 original twin one of the best teams I've ever had besides a remake of the 59 Blues basement the blues DeVille love that amp two best amps I've ever had 67 blackface Twin Reverb and a 1990s Fender Tweed Blues DeVille
@@YEARS_OF_TEARS_BLUES Even the first silver faces sounded as good as blackfaces after CBS bought fender they were still building amps with pre-CBS boards & parts with the same values. Then things went to shit with a huge corporation cutting corners sourcing the cheapest parts not caring about the right component values that made Fender amps sound & feel so sweet.
I’m running this video thru a Vox AD50VT right now. It’s a really decent amp. But I also have a VT40X works great I used it on the road for 7-8 years. And now it’s on my TV lol. And I have a VT100X blown the day I got it ,a VT20+ blew after 12 years of steady use.
But none of that really matters as long as I have my Carvin X100B.
90 percent if you just took everything apart and cleaned then put it back then it would work.
A lot of the newer amps are junk anyways with a lot of fake parts 😂😂😂 they're not built to last anymore throw away junk
cell phone techs gonna be the new amp techs.
even if you could get the machines to make old school amps point to point style the manufacturers would still charge 5-10x the price of a starter amp.
Ladies and gentlemen sexual chocolates,,, sexual chocolates!!!!
hi Brad you're a wizard 🧙♂️!!!!
Yeah… had a similar Vox amp years ago (2003) that I wasted a bunch of cash on. One of the boards went out within a year. Took it to a reputable amp wizard and he immediately looked exhausted just seeing that hunk of crap coming through the door. I just gave it to him to salvage whatever he could. Lesson learned…
This is how I feel about most modern trucks, oversized, overweight, overpowered and over complicated.
Yeah f*** that
Those amps are pretty much disposable aren't they? Like old laptops
Had a Marshall Code 25 or 50 kept blowing the fuse on the power supply. Turns out it was common amongst some of them. I emailed Marshall directly because I couldn't find a schematic for the power supply, they wouldn't send me one because I wasn't a Marshall dealer, and wouldn't even sell me a new one. Last modeling amp I'll own. I prefer simplicity these days, glad that happened because I relied on that thing too much for my tone.
A while ago, I had a similar problem with a GK 100cel digital guitar amp. The power section shut down, and there were no service techs around who were authorized by GK to get the schematics. Of course, this was about one month after the warranty ran out. "Advanced technology" doesn't always live up to the hype.
@@plasticoflamingo2952 nope it sure dont! That whole experience though made me seek out simpler ways to mold my tone, so it was worth it.
Do you do a Crate GT200 DSP 2X12? It doesn't turn on, no blown fuse, the DSP is a separate circuit board. Hybrid tube/solid-state 2x12. It's been kept in an Anvil case pretty much since new. Modeling amps are use and throwaway. I do have an early modeling amp, the original Roland Micro Cube. I love it. When it's done, I'm planning on coverting it to a tube amp. I have a schematic that was drawn out using a single ended hand wired tube amp using 5878 and 5672 tubes. I looked all over the place and couldn't find how to get in touch with you.
You need advanced degrees in computer sciences to work on a freakin' toaster, these days. It's not a particularly good thing.
Wait a minute. What was the symptom? While I agree that boards with lots of surface mount ICs would be a major hassle to track down a defect, the symptom could point to a power supply failure, or output amp failure. Both of those circuits are relatively easy to repair. I've made money and lost money repairing modeling amps. It depends on the symptoms and the failure history of the particular model.
True. Even though I had crush on this (before I knew better anyway). The thing is I'm not even sure who would work on it. Too delicate for amp repairmen, too weird for common electronics service.
Haha 😂 I work at a shop repairing guitars and tube amps. We don’t even take in solid state amps let alone PCB’s with SMD parts on em….nope! No thank you
If your buy one of these amps, buy all the warranty you can find if you plan to keep it. These were not designed to be worked on - other than perhaps component replacement, i.e., if something on the board is dead, replace the board.
Yeah , I’ve got two stacked in the corner. One is the VT100X a guy gave me after it sat in his trailer for a year. Only got used twice. But never worked even once for me. And no tech in the country will touch it with a fifty foot pole .
Surface mount? Forget about it. Regular PCB? Maybe.
I just finished an overhaul on an early Marshall DSL401. It was real fun disassembling and re-assembling. That's about as far as I'll go. This one looks like a nightmare
Shame he lives in the USA.
Mend it mark would give it a go I bet.
Vox amps like this are crap, like the tiny turd MV50.
#84_Im65_AndBullshitDoesNotImpressMe🇺🇸🇮🇱✝️
Just buy a modeler and DI at that point.
Hung on your time foolin with it. Damn pc boards bad enough
That Randy Watson shirt makes my day
"They play so fine don't you agree?"
All surface mount I bet, Good Call.
I once owned one of those VTX amps 20 watt great little amp but the usb socket broke took it to the local tech, one it was getting the parts two the cost of would be just as much as the amp, that's how they are designed so I sold it the amp did work but to access the tone room was through the USB ,
a modeling amp is basically a computer with a high-powered speaker.
to work on that stuff, you have to be 2M repair qualified, and have a special work scope to see those TINY traces and ic leads.
I have everything to do it, sans desire.
Good call. 👍
SMD nightmare, I don’t blame you, probably gonna cost more to fix than to buy a new one.
Vox actually went crappier than their valvetronix series? Wow...these companies just do not care about putting out good products that last
😂this is a valvetronix ad120vt
That’s why it’s better to save your money to buy a semi decent tube amp, even if you are just starting out
I'm always thinkin why these new companies won't make some simple design combo amps that would be with circuit that's easy repair and build and you can sell it cheap. Every component from the mid-fi qualty/price range. Basic speaker. No digital but it could be transistor couse it's cheaper to make and just fiddle the circuit and EQ to fit the speakers tone. No this fancy shit that can't be repaired
That's the kind of amp i would buy. I've been lazy to find me amp that i would like the sound of couse i am a drummer and have spend my money on good Gretsch drums and good Fender Stratocaster. I have one modeling amp but it sounds so muffled or too bright. I've dialed it in for my strats humbucker sound but it's just so one-dimensional. I've looked the amp market but all the cheap amps are digi or something not so good. I think the market would need like new Ford model T basic amp that would be 1 cheap 2 easy to repair 3 analog 4 great sounding, good cleans and good distortion. 5 Basicly good looking, few colors to choose from. Not over this, not over that.
Vox pathfinder
@@jordancochrane3895 pathfinders are good, wish I hadn't sold mine. Theres also the Epiphone Jr and the early Vox AC4TV. Both inexpensive valve amps.
If you aren't a tube snob you can find tons of 70s 80s 90s solid state 1x12 combos.
Basically a Bluetooth speaker with a built-in guitar amp digital simulator. No way to fix that if the fault is outside of the analog circuit. Some people could troubleshoot it, but the question is if you can even get any of those ICs let a lone the programs that you will most likely need to load onto some of them.
And these ain't the simple and rugged old school digital ICs from the 80s which basically last for ever either.
In the end, it will cost more than just replacing the whole board if you can even get ahold of one.
I have a Peavy JSX i need gone thru. How do i get in contact with you? Assuming its its something youd want to work on.
Thanks but I am discontinuing taking in outside work for a while.
I need to fix my tweeter in my B & W DM 220 speaker, i received the diaphragm for it and would like some advice on how to install it if you could do that i would be ever so grateful!
No clue. Never done it before. I guess Id start by removing the screws on the tweeter and see how it all comes apart.
@@TheGuitologist good idea
@@TheGuitologist maybe you can go live with me as a guest and we can do it together!
@@JaniceLallaGosh what an offer?
@@TheGuitologist I posted an update on your recent video
The best repair for those is the dumpster.
It's not that bad. Any decent electrician could work on one. Now if the IC goes out and you can't replace it, that's a different story.
That's the con of modeling amps, they may have a lot of options, effects, etc, but when something breakes it's like repairing a computer. There were two Fender Mustangs in my school, my teacher's Mustang II and school's Mustang III that broke before I started going there. Mustang II sounded OK and the teacher liked but it broke too, at the least show before pandemic (if I remember correctly it didn't wanted to power on before the show, then it powered on for the show, then it didn't again, I'm not sure, I already finished the school at that point but I was helping them, as a 'roadie'). It was decided that it's not worth to repair the III, later school bought Marshall Code 25, then Mustang was legally thrown out (I don't know how to call it in English, it was removed from school property list / listed as recycled or something), I took it home and turned into 1x12 cab. I still got the board, but I don't even have idea what is broken. The cab sounds ok, but I'm thinking about buying better speaker. The teacher still haven't replaced his Mustang II, in the school he plays school amps and at home he plays acoustic or semi-hollow anyway, I offered him to exchange it for my Orange Crush 35 LDX, it's worth the same on used market and even if I don't repair that Mustang, I can still turn it into a cab, plus it wasn't for that teacher I wouldn't get the previous Mustang. Sometimes Peavey Bandit 112 pops up on used market at the same prices, If I will be able to hunt that, I will offer the teacher exchange for that, I always thought that would be perfect inexpensive amp for him, he was always very pro-modeling dude and I was always very pro-analog dude and I was trying to convince him to 'turn to the dark side'.
A very common problem with SMD construction are these intermittent issues that pop up, like the one you're describing. _Usually_ caused by a small, invisible, break in a solder connection. Sometimes it makes the connection, sometimes it doesn't.
The main problem when this occurs, if that is the problem, is,
1: it can be very hard to find.
2: if you do find it, repairing it can be a nightmare.
Messing up a SMD repair often makes things much worse. More parts can get damaged. You can suck up the component you're trying to fix in a single drop of solder etc... It's seldom worth the effort. Either replace the board you think the problem is on, if you can. Or do hat you did and get a nice speaker and can out of it.
...which was probably the smart choice!
A decent microscope, a decent rework hot air station, a decent amount of patience... I had to fix a lot of SMD boards, almost always there are leaky caps (SMD variety), cold joints and if anything with custom firmware or any custom ASIC goes, utterly unfixable. On top of not having any schematic most of the time. Swapping out opamps is actually easier than with thru-hole components, just heat up, tweezers make go fly across the room, clean a little bit, new ic, solder, done.
If the guy is partial to vox modeling🫤 he could use the amp as a cab and he could get a tube cake pedal with a vox modeling pedal board🤷🏻
By the time someone charged him for the work he could buy that stuff.
I used to be like you, then I educated myself by working on shit like this. It just takes a little homework. And usually for every datasheet I look up, I find a rabbit hole of inspiration for my own circuits. I can almost guarantee that whatever is wrong with this amp is either a peripheral component, or part of the analog section.
Same with those overpriced disposable Fender amps...when something goes wrong,folks are usually gonna have to trash them
That dude at psionic could do it I'm sure
Im going to assume that’s a joke, but if not, it’s not a matter of inability. I have everything needed to fix it. It’s a matter of getting documentation and putting in an insane amount of time on something not worth the effort.
Brad do you do pedals I have a Looper station RC-2 the powers up but it doesn't work,I think it's got a bad chip? Not kidding and I don't know how to get a hold of you any other way.
I'm not taking on any outside work now.