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| Ah Ha. Pay dirt. The surface mount chip in the top right is an HEF40175B chip, which is a quadruple D type flip flop, which can be arranged to look like a shift register. Sure enough, the signal lines on the two servo outputs which are present go directly to the output of the D-flops. In fact, the unpopulated pins appear to be for a 3rd channel. Bigger... |
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