Old 70s Amplifier needs repairing, can it be fixed?

This old amp is having some serious issues, can i find the problem and fix it without a schematic?
CAN I FIX IT?
#fix #fixing #how #uppbeat #can #canifixit #fixit #howto #amplifier #repair #amplifierrepair
let's fix it
I sincerely hope you enjoy the video, If so please consider subscribing.
Many thanks, Ade
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Disclaimer: I am not a professional in electronic repairs, a mechanic by trade who has had a titful of cars but enjoys trying to fix everyday broken items.
This is not a fitness channel, I am not very good at sit ups or push ups, but I am especially talented at fuck ups so join me as we try to fix the broken and probably break the fixed.
My Equipment
Hot Air Station - amzn.eu/d/0K13pEK
Soldering Iron - amzn.eu/d/60CgYT2
Digital Microscope - amzn.eu/d/54jUmqY
USB Hub - amzn.eu/d/64l4HvX
Microphone - HyperX Quadcast S
Face Camera - Canon Legria HF R606.

[@djsherz]

I'd deffo be doing an ESR test on those old 'lytics. I'd also be very suspicious if the capacitance reads significantly higher than it's supposed to be - it's a good sign of a wrong 'un.

[@strabanetyrone]

Brilliant intro 🤣

[@MadMal2024]

There are other Amps by Audiotronic that do come up in a Google search... But they are probably earlier or later than that one. From the look of the builds; layout and types of PCB's It is reminiscent of a number of Japanese manufacture products of that era. It could even be a rebranded version of a proprietary big brand. Toshiba used to do that a lot. Good luck; you'll probably need it; especially if its caps that are the problem.. Some equipment of the era used some weird values.. From the style and layout; especially that encased transformer; you may be looking at a Sanyo product.

[@FixitAde]

Cheers mate ill do some digging 👍

[@SeasickUpload]

May I suggest you use your T7 to test the capacitors? Multi meters will give you an rough capacitance reading but don't measure ESR, the T7 will give you both, along with voltage loss.

[@FixitAde]

It can be a pain in the arse getting some capacitors in the tester to be fair

[@SeasickUpload]

@@FixitAde Get yourself some little crocodile clips on a short bit of wire, leave those clamped into the tester. Cap testing becomes much easier :)

[@enigmaticmf]

@@FixitAde Another option would be to add some wires attached to those small mini-grabber clips, and solder them to the board - and drill a hole to allow them through the case (I used some heat shrink around the wires through the hole to allow for some strain relief there). .... And like others said, if the caps read higher than the stated markings plus their tolerance, it's a sure sign the caps are bad. I think the ones you were saying were fine, were actually significantly higher - so I believe those caps are indeed bad.

[@Knappen82]

Not quite David Attenborough there in the beginning, but close enough 😅

[@hazzy9079]

Great realtime repair. Your soldering iron link doesnt work. May I know what solder lead you're using? Seems easy to work with.

[@FixitAde]

Thanks mate, yeah the soldering iron is great to be fair here is a link 45W Soldering Iron Station Rework Repairing Tool 937D 5 Tips amzn.eu/d/7liq4lu

[@hazzy9079]

​​@@FixitAdeThank you. May I know what solder wire you're using too? Seems to flow & settle nicely

[@FixitAde]

I learnt the hard way with the solder, it really is a case of spending a bit more to get decent solder instead of the cheap crap on amazon (same with solder wick) I have 2 main types of solder, the thicker solder is leaded and the thin solder is unleaded both were purchased from CPC

[@hazzy9079]

@@FixitAde Thanks for the quick reply. Appreciate it. Keep the repair videos coming. Subscribed!

[@FixitAde]

Thanks mate 👍

[@NoBozosAllowed]

Please tell me you have a oscilloscope and a signal generator?

[@bluckfox]

some time s they are not worth fixing some times they are a waste of time Fix It Ade as a toy maker i know i deal with bettire acid lake out on the contacts on bettire turmniale's

[@christophermarshall5765]

Ade tests capacitor on DMM......... Display reads F$%^&D!! LOL!!

[@FixitAde]

Loves a capacitor me ha ha 😂

[@Irilia_neko]

Fun intro 😹

[@FixitAde]

Gotta have a giggle in life lol 😆