Re: Mockingboard

["william strutts" <wrstrutts1@nospam.home.com>]

"Michael J. Mahon" <mjmahon@aol.com> wrote in message
20010922022139.08498.00000313@mb-md.aol.com">news:20010922022139.08498.00000313@mb-md.aol.com...
> Marsha replied:
>
> >"william strutts" <wrstrutts1@nospam.home.com> wrote in
> >news:3wRq7.122747$K6.53604515@news2:
> >
> >>  It is marked
> >> M8428/LM/386N-3 and it is marked C3 on the board.
> >
> >It's a common Audio Amplifier chip
> >the notch/dot go toward the back of the computer
> >
> >Radio Shack # 276-1731    $1.39 each according to the catalog
>
> ...and in response to William's question about whether to plug
> it into an Apple prior to repairing the LM386 amplifier:  don't.
>
> The partially ablated gold contact, if it is a power or ground pin,
> indicates that the excessive currents that fried the (output
> shorted?) amplifier chip were enough to zap contacts.
>
> Replace the fried chip and _then_ check it out--being ready
> to cut the power if there is any sign of overloading.
>
> -michael
>
>  Email:  mjmahon@aol.com
>  Home page:  http://members.aol.com/MJMahon/

Thanks. I suspected that would be the case. I didn't think of
the power surge thing that could be the reason for the gold
contact being damaged.

--
--
William R. Strutts - wrstrutts1@nospam.home.com - Whatever!

C'est moi!  http://www.facelink.com/wrstrutts

Just hacking away...

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