Mackie TH-15A

[anwarotti]

Hi, please do yourself a favor and not put your email address on the forum. That is a good way to start getting all manner of spam in your in box.

If you took the unit to a qualified service shop and it now has a new problem when you got it home, TAKE IT BACK, a shop should have a shop warranty. Tell them you paid for it to be repaired but it is not yet fully repaired. Give them a chance to correct this.

hello.
i tried to re-edit the post or delete my email from the post but i couldnt find a way...it only shawing " flag , quote " not the " edit " option/

when i took it back to the authorized shop to re-check on it.. he said 60$ upfront .. i paid that .. then they checked on the speaker ... they couldnt fix it.. but also they didnt give my money back they sad you have 60$ in credit if you want to fix any other things in the future .. and they said about the speaker you need a new PCB .. thats why im asking what exactly were done on this form .. to see if i could fix itor it not to fix it or just buy a new assembly amp because i couldnt find a PCB by itself anywhere even the kit you cant find it anymore..

i dont know .... i feel lost .....

[g1]

sir, i have a mackie thump 15 a ... and i have the same problem you had long time ago ..
i was wondering if you still remember this and how you have done it before ...
would you please let me know what did you do exactly to fix this ..

Did you read through the entire thread? In post #28 he said he found Q104 to be bad. Later he said that the second unit had the same fault.
https://music-electronics-forum.com/...507#post638507

[anwarotti]

Did you read through the entire thread? In post #28 he said he found Q104 to be bad. Later he said that the second unit had the same fault.
https://music-electronics-forum.com/...507#post638507

i saw that ,, and i was searching for the Q104 ... i couldnt find it .. i'll will try to recheck again tonight
and is it Q104 or U104 ???

[g1]

i saw that ,, and i was searching for the Q104 ... i couldnt find it .. i'll will try to recheck again tonight
and is it Q104 or U104 ???

It is Q104, the regulator for the +15V supply. Lower left area on pg.1 of schematics.

[anwarotti]

It is Q104, the regulator for the +15V supply. Lower left area on pg.1 of schematics.

Where exactly it would be on the actual board?? no luck finding it

please check the link below it has pictures of the actual board. please let me know where is that part so i could try to change it .. just give it a luck.... thank you.

https://drive.google.com/drive/folde...1r?usp=sharing

sorry for bothering all of you

[g1]

please check the link below it has pictures of the actual board. please let me know where is that part so i could try to change it .. just give it a luck.... thank you.

https://drive.google.com/drive/folde...1r?usp=sharing

Google drive does not work on my computer. I will send you an email so you can forward the pictures and I can post them here.

[anwarotti]

Try this link...
the website wont let me add files over 1MB .. i prefer to keep the images with a good quality .

[anwarotti]

Google drive does not work on my computer. I will send you an email so you can forward the pictures and I can post them here.

its better if you send me an email so we can work on it faster than here 1 message every single day lol

[g1]

its better if you send me an email so we can work on it faster than here 1 message every single day lol

Sorry but I will not be able to help much with this. It looks like the names on the circuit board do not match the names on the schematic. So Q104 could actually be called Q4 or something. If you had an electronics background we would just say that you need to find out if the +15V supply is working. Then you could trace it back.

It should be found on this circuit board, maybe on the bottom side.

[anwarotti]

Sorry but I will not be able to help much with this. It looks like the names on the circuit board do not match the names on the schematic. So Q104 could actually be called Q4 or something. If you had an electronics background we would just say that you need to find out if the +15V supply is working. Then you could trace it back.

It should be found on this circuit board, maybe on the bottom side.

i just sent you an email with 2 pictures of the back you could check them

[anwarotti]

i've uploaded a full service manual to the drive you can check it and see what we can change

[g1]

i've uploaded a full service manual to the drive you can check it and see what we can change

That is for Thump12A. This thread is for Thump15A. They are not the same. If yours is 12A, the problems Lowell found in the 15 will not apply. That is why we can't find the parts he was talking about.

You can start a new thread about Thump12, but if you have no electronics experience I don't think anyone will be able to help.

[anwarotti]

That is for Thump12A. This thread is for Thump15A. They are not the same. If yours is 12A, the problems Lowell found in the 15 will not apply. That is why we can't find the parts he was talking about.

You can start a new thread about Thump12, but if you have no electronics experience I don't think anyone will be able to help.

i have mackie Thump 15A... but i couldnt find anywhere the service manual for the 15A .. but if you take a look at the content table both the 12 & 15 are the same but different powers.
2042206-XX PCB ASSY ASP TH12Av2/TH15Av2 (TOP) ........................................................ ......19
2042206-XX PCB ASSY ASP TH12Av2/TH15Av2 (BOTTOM) .....................................................20
2042206-XX SCHEMATIC ASP TH12Av2/TH15Av2 (INPUT)................................................. ......21
2042206-XX SCHEMATIC ASP TH12Av2/TH15Av2 (LF_HP_PROCESSING)..............................22
2042206-XX SCHEMATIC ASP TH12Av2/TH15Av2 (LF & HF CROSSOVERS) ...........................23

[anwarotti]

look at the pictures here please..

[Enzo]

That schematic is for V2, as in version 2. Is yours a V2?