PHILCO PH-21 - SCHEMATIC DIAGRAM [CIRCUIT DIAGRAM] - USED ICS - STR-FSCQ0765RT(POWER REGULATOR) – PBC817 (OPTO COUPLER) - OM8370 – TC4053 – LA78040 – AN17821 & 24C08 (MEMORY IC)

PHILCO PH-21 - SCHEMATIC DIAGRAM [Circuit Diagram] - Used ICs - STR-FSCQ0765RT(Power Regulator) – PBC817 (Opto Coupler) - OM8370 – TC4053 – LA78040 – AN17821 & 24C08 (Memory IC)

SCHEMATIC DIAGRAM [FULL]

POWER REGULATOR PORTION

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