Ion total pa pro 15in speaker relay prolem

[hmendez86]

[hmendez86]

Re: Ion total pa pro 15in speaker relay prolem

I have this PA AMPLifier that the i dont have audio the relay should be click when i turn on the amp.wont do ani audio..the transistors are good and large caps any ideas will help.

[CapLeaker]

Re: Ion total pa pro 15in speaker relay prolem

probably it is in protection mode, because there is dc on the output.

[budm]

Re: Ion total pa pro 15in speaker relay prolem

Did you check the DC Voltage on the relay coils?
It may be in protection shutdown.

[petehall347]

Re: Ion total pa pro 15in speaker relay prolem

check the big transistors for short circuit
also check voltage on any end of the copper coil with reference to chassis ground

[hmendez86]

Re: Ion total pa pro 15in speaker relay prolem


Heres a pic on the back of amp on the relay i dont see 24v...the big transistors are ok....

[budm]

Re: Ion total pa pro 15in speaker relay prolem

I am a little confused, you show TWO amplifier boards, which one of the two amplifer boards that the relay does not come on?

[hmendez86]

Re: Ion total pa pro 15in speaker relay prolem

Oh dam i add the one with the big relay since both doisng the same thing...but, am focusing on the big relay amp...theres a transistor with 6 legs it get bit hot when indo turn on the amp...think is a controler transistor.

[hmendez86]

Re: Ion total pa pro 15in speaker relay prolem






This is the transistor thats get bit hot.

[hmendez86]

Re: Ion total pa pro 15in speaker relay prolem

Check for 24v on relay ..and there no 24v

[budm]

Re: Ion total pa pro 15in speaker relay prolem

Oh dam i add the one with the big relay since both doisng the same thing...but, am focusing on the big relay amp...theres a transistor with 6 legs it get bit hot when indo turn on the amp...think is a controler transistor.

That is amplifier IC probably for driving the Tweeter.
It looks to be LM1?75.

[budm]

Re: Ion total pa pro 15in speaker relay prolem

Oh dam i add the one with the big relay since both doisng the same thing...but, am focusing on the big relay amp...theres a transistor with 6 legs it get bit hot when indo turn on the amp...think is a controler transistor.

1) So Both amplifier boards are in the same speaker cabinet?

2) The big relay you are referring to this board, correct? https://www.badcaps.net/forum/attach...2&d=1602280760

[hmendez86]

Re: Ion total pa pro 15in speaker relay prolem

1) So Both amplifier boards are in the same speaker cabinet?
No....for diferent cabinets but same problem.
2) The big relay you are referring to this board, correct? https://www.badcaps.net/forum/attach...2&d=1602280760

Yes the big relay is the one am focusing..

[budm]

Re: Ion total pa pro 15in speaker relay prolem

OK, let me trace out the board so I can give you test points to test.

[hmendez86]

Re: Ion total pa pro 15in speaker relay prolem

The amps are for different cabinets and starting on the big relay amp first...the transistor LM1875L is for tweeter

[budm]

Re: Ion total pa pro 15in speaker relay prolem

https://www.badcaps.net/forum/attach...2&d=1602280760
Can you please do straight shots hi-res pictures of this board top and bottom side?

[hmendez86]

Re: Ion total pa pro 15in speaker relay prolem

[budm]

Re: Ion total pa pro 15in speaker relay prolem

Thanks for the pictures.

https://www.badcaps.net/forum/attach...8&d=1602306171

There are 5 large lytics caps, what DC V do you get when measure right between the two legs of each cap?

[hmendez86]

Re: Ion total pa pro 15in speaker relay prolem

[hmendez86]

Re: Ion total pa pro 15in speaker relay prolem