Amp chip help.......

[skippy1969]

Well....... I was listening to my Mars JH100 at a "reasonable" volume level today and I heard a "POP" and the right channel went dead and smell a hot bakelite smell coming from the amp.
So I took out the amplifier and found that the center section of the right channel amp chip was literally blown out.
Anyone ever seen this happen before?
And does anyone know what amp chip I should use to fix the Mars or if it is available?
I think it is these chips?
http://www.ebay.com/itm/HA1397-Original-New-Hitachi-Integrated-Circuit-/400483332565?pt=LH_DefaultDomain_0&hash=item5d3eaab1d5

Any help would be greatly appreciated......


The blown chip.

The good chip.

 

[blu_fuz]

Dayum, sorry to see that bud...... Is your house getting any power surges lately?

 

[skippy1969]

Dayum, sorry to see that bud...... Is your house getting any power surges lately?

Thanks man,no power surges that I know of.........
I think the amp chip are just old and it happened I pulled it out of storage and I was listening to it today.

 

[baddboybill]

Oh Scott that really sux. They seem to look like good replacements see though this is why I say anything can happen to these 30 year old units at any given time

 

[skippy1969]

Oh Scott that really sux. They seem to look like good replacements see though this is why I say anything can happen to these 30 year old units at any given time

Yes you are right Bill.....
Old stuff breaks now and again for sure.
I think these chips are correct too.
They seem pretty common,I see them for sale all over the internet.
If they are the correct ones I'll get them and replace both so I won't have to worry.

 

[baddboybill]

Hopefully none of the other components sustained damage too

 

[skippy1969]

Hopefully none of the other components sustained damage too

I hope not too,but visually everything else looks ok and it worked fine on the left channel.......

 

[baddboybill]

Looks like it overheated and literally caught fire

 

[skippy1969]

Looks like it overheated and literally caught fire

Yes it must have got a little warm,it smelled like it anyways......
The white heat sink compound between the chip and the heat sink is all hard and probably not transfering heat like it supposed to so I assume the chip got to hot and fried it out.

 

[baddboybill]

Yes it must have got a little warm,it smelled like it anyways......
The white heat sink compound between the chip and the heat sink is all hard and probably not transfering heat like it supposed to so I assume the chip got to hot and fried it out.


Yep could very well be what happened

 

[skippy1969]

Well I got the n.o.s. amp chips today.
I'll attempt to install them in the next week or so when I get time.
I hope these do the trick.

 

[blu_fuz]

Good luck and don't drink coffee before soldering in the new ones

 

[skippy1969]

Good luck and don't drink coffee before soldering in the new ones

LOL! ok Joe,thanks for the advice!