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Author Topic: dead OP-AMP in Casio MT-45  (Read 6297 times)

wax+wire

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dead OP-AMP in Casio MT-45
« on: March 09, 2014, 08:43:35 AM »
Hi guys.

from all accounts, the op-amp in my casio MT-45 is dead.  I can get a proper audio signal if i tap it just before the IC, but no sound out of the speaker/headphone/line out.

The chip is seems to have no info on it self out their. LA4138

It is a 14 pin chip with a big heatsink on the end.  9V.

thoughts on replacing it.
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Circuitbenders

  • crustypaul
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Re: dead OP-AMP in Casio MT-45
« Reply #1 on: March 09, 2014, 10:05:11 PM »
Typing LA4138 into google just bought up 311,000 results!

Its a 2.7 watt power amp.

Theres 10 listings for them on ebay right now
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i am not paid to listen to this drivel, you are a terminal fool

wax+wire

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Re: dead OP-AMP in Casio MT-45
« Reply #2 on: March 10, 2014, 07:11:17 AM »
i lose at the internet.

i'm sure i typed it.

forgive me and my failings :->
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