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.
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
i lose at the internet.
i'm sure i typed it.
forgive me and my failings :->