Hitachi MB-H2 board pics / more partial “schematics”

日立 MB-H2 アナログ基盤・ロジック基盤の裏側

See also Hitachi MB H2 (MSX) partial schematics and repair.

Raw analog board pic:

Just some colored traces on a board pic with RF shield removed:

(Grey: GND
Pink: 12V
Violet: 5V
I do not really remember the rest…)

Logic board:

(This is the backside of the logic board, left side is bottom side.)

Logic board, front side. This is actually a different H2’s board (with highly readable print on the chips), but should be the same.

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