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I am fixing stereo preamp. The preamp connects to keypads. The key pads do not control preamp.
I suspect a rs485 chip failure. it is an elan 630. I am inspecting the microboard but do not see any chips that look like typical rs chips.
I suspect a rs485 chip failure. it is an elan 630. I am inspecting the microboard but do not see any chips that look like typical rs chips.
