Blackstar HT5 Can we fix it?
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- Опубликовано: 2 июл 2023
- Blackstar HT5. This guitar amplifier came in with a intermittent fault. But on closer inspection even before we open it up, we discover that someone has inside this amp. The screws on the back panel are not screwed in properly and screws are damaged. What do you think we will find when we look inside?
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Excellent video sir!
Hello, thank you. Thanks for watching and take care.
@@vintageguitaramp_guitarteacher You're welcome. Take care too!
It's a design flaw in both revisions, heat build up and board goes conductive
Was fixing one for myself but lost the pcb bolts
Hello, thank you. They sound okay but not a great design. Thanks for watching and take care.
I suspect the initial issue was the FETs that are used as phase inverter failed and burned up the PCB which to be fair is a tough repair to start with due to the damage it does but this is a perfect example of how NOT to fix it. I beleive Blackstar don't sell replacement boards any more so yeah, another project chassis...
Hello. Thanks for the info on the FETs. You are right about that being a tough repair. I would have been struggling to do a proper repair on such a failure. I think once the board is burnt to that degree it's time to call it a day. What's happened here is a poor repair and a waste of the customers money which he could have put towards a new amp. Who ever tried to fix this, it's clear they were not very good with a soldering iron due to burnt wires and components.
Thanks again for the info. Take care.
Thank you for sharing. Any idea what caused this failure? An attempted 'mod' perhaps? Or maybe a bad electrolytic? Or a bad power tube?
Hello Zack. Check out the comment @sjgreaves. He explains it very well. Thanks for watching and take care.
Wow, 2 amps in a row not worth repairing. That's what I like about the 60's and 70's Fender amps. Every component can be replaced if necessary.
Hello Michael. Yes two in a row. A rare occurrence indeed. Yes you can't beat the old tube amps. Thanks for watching and take care.
Would you recommend getting a black star guitar amp mark iii 40?
It's Blackstar ht5r with reverb
Hello. It was, yes. Sadly it was written off due to the damage on the board. I plan to build an amp in to the chassis later in the years. Thanks for watching and take care.
Soldered n the dark whilst wearing boxing gloves.
Hello Steve Ha ha ha ha !!!!. That's a good one. Thanks Steve. take care.
My thoughts are that these low to medium priced amps only survive a few basic repairs before they become uneconomical to put right. This is a classic example of that, aided & abetted by the last idiot that was let loose on it. I'd take the amp chassis and cabinet in exchange for your time and trouble and use it for another project ..
Hello Pete. What a pa larva lol. Yes, modern amps are not made to last. A good idea there. I could a Fender Champ circuit in to it. Take care Pete.
@@vintageguitaramp_guitarteacher Exactly what I was thinking Martyn 😅.. Look after yourself
That's a very short video lol wow
Hello Glen. It was. But sometimes that's how it goes. Shame it was butchered. Thanks for watching and take care.
The only real fix blackstar should've done would be to move the phase inverter mosfets away from the main PCB and putting heatsinks on them. The resistors next to them are getting cooked.
Funny thing is that Bugera copied the same exact bullshit design in the G5 and guess what? The same thing happens to them.
Hello, I agree, dreadful design. A proper tube phase inverter would have been better. Thanks for watching and take care.
"It's cooked"...or something similar
Ha ha. Hello Eddie i'd say you guessed about right there. Thanks for watching and take care.
@@vintageguitaramp_guitarteacher It looks like the previous repairer's tools consisted of a knife & fork and a hot poker...
*smh*
Thank you.
All of this work by the previous tech was so unnecessary.
Hello David. Yes, it just needed to straight in the trash. I have the amp now, so we should be building something in to the chassis later in the year. Good to hear from you. Take care.
Definitley the right choice not to attempt a repair and risk having your name associate with that amp! ... could it have been that wonky FET blowing up that started that mess ? The board was really toast at that point I guess..
Hello James. As we discussed when you came for your lesson, the board is toast. The customer does not want the amp back so I have wavered the bench fee for it. Another project?!!!!!!!!!!!!!!!!!!!!!