Mackie Thump 15A "red overload led always on" problem [SOLVED]

In this video I will show my experience in repairing this speaker from Mackie (TH-15A)
The red led (overload) was always on as soon as I turned on the speaker with no sound coming out
I unmounted the speaker but apparently everything was ok (no smells, no burns, no bad components)
After a little research I found out that the problem was a little transistor, the S8050 TO-92 NPN on the +15v output circuit (component Q104 in the scheme)
So I substituted the component with a more powerful SS8050 as suggested and luckily the speaker started working again
I would to thank the people from the forum BADCAPS.NET and I refer you to them for more information
"Remember that repairs are not recipes"
[cit. chungalin]
Links:
- badcaps.net/forum/showthread....
- elektrotanya.com/mackie_thump...
- alltransistors.com/pdfview.ph...

[@dave225]

Thanks! Saved me a lot of time analyzing the issue. I just changed out the transistor and fixed it in 30 minutes...

[@coccosapiens]

Thank you for sharing!

[@songsfromthelord888]

Thanks for your help Davide 🙂
Remember, Davide, that God loves YOU PERSONALLY! 🙂

[@coccosapiens]

Happy to help!

[@ytimami]

Totally worked. Many thanks.

[@coccosapiens]

Great to hear! Thank you for sharing

[@brayanisaacgomezvelasquez6295]

thank you very much!

[@taylorkeller5899]

Worked!! Great tutorial and suggestion on the transistor! Good as new

[@coccosapiens]

Thank you for sharing!

[@bobbyculture1002000]

Can you tell me the replacement part number again please..can’t seem to find the part

[@Monte91]

@@bobbyculture1002000 S8050 and he replaced it with a ss8050

[@AndreiBanciu]

​@@bobbyculture1002000SSA8050 NPN Transistor in TO-92 capsule

[@juliendieullepsy9223]

It worked for me too! Thank you x10000000000!

[@coccosapiens]

So glad that helped! Thank you for sharing

[@roadtrash]

Thx, it's work!!)

[@coccosapiens]

Thank you for sharing your experience! 🙏🏻

[@tiangp88]

Thanks, i hope it works

[@coccosapiens]

@@tiangp88 happy to help ❤️

[@bartonbrunner-lc1jm]

Did you make another video of your mackey overload repair?

[@coccosapiens]

nope :(

[@davidoconnor393]

I thank you for that information I'm trying to fix a dump 12 1,000 w. I'm driving myself crazy trying to reorder that specific chip that burned out it's in the thermal protection part of the amplifier and limiter they have you four on the schematic and on the circuit board and TDA 8 9 5 4th is what is actually on the chip itself it's a 24-pin chip with 12 on each side one side handling low frequency and the other high frequency it's the biggest chip on their board that's all I can find on this thing is the schematic which the electrical schematic which they sent me which shows nothing more than what's on the board you for and those values I've tried to go to Moser I put that information in that TD and it never came up nothing I don't even know who the manufacturer is but I know it they said to get a good one like Panasonic. So how did you get that part number I mean what did you do I mean yeah you got those numbers but where do you put those numbers into to get the newer better part thank you sir

[@coccosapiens]

I searched on eBay!

[@sofabiru6852]

🤗😇

[@bandidomxgarage7898]

So thats why my speaker stop working?

[@coccosapiens]

CAN be the same problem