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Here's the component side of the circuit board.
You can see the various components in these views of the circuit board. Remember, these are all discrete components here -- no integrated circuits! But state of the art at the time, a lot of circuitry crammed into a small space.
Six of the gray components with an oval cross-section (marked or stamped with "Sony") are transistors.
The 7th similar looking gray component is a varistor. It's the one at the front left of the circuit board in the 3rd photo in this series.
Say, do they still teach the resistor colour code in schools these days? :)
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