TDA7850 replace TDA7388

henrylin · ‎2025-06-29

I installed the power amplifier and replaced the TDA7388 with a TDA7850, but there's no sound after installation. What could be the reason?

Peter BENSCH · ‎2025-06-30

Welcome @henrylin, to the community!

Why did you replace the TDA7388?
If it was because of a defect, how can you be sure that the speakers and the connections to them are working?
Did you check the relevant voltages (MUTE, ST-BY, VCC pins)?
To be on the safe side, you should also place a 10k resistor from pin 25 to GND, which was not necessary with the TDA7388, but with TDA7850.

Regards
/Peter

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