Sony STR-K740P Chipset

The Sony STR-K740P has an exotic set of chips to provide all the functionality that it has. You will find many amplifiers in this series with IC201 (M61511FP), which is a sound processor IC by the Mitsubishi Corporation. This chip solders underneath the PCB on the printed circuit side and all the analogue inputs switch through it.

Here are the two UPC2581V driver chips, which are responsible for driving the power output transistors.

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