A-15595 WPC 7 Opto Switch

A faithful, electrically and visually accurate reproduction of the original WPC 7-Opto Switch board, built using modern, high‑quality components and matched routing.

Replaces A-14977 and A-15576.

Technical Features
- Brand new board built using original‑spec components from reputable manufacturers
- Improved thermal performance around the high-power resistors
- Quality Molex connectors
- Authentic schematic‑correct design — all component placement, connections and routing match the original board and schematic
- Fully tested

Why choose this board?
Although generally reliable, this board is known for cosmetic heat damage around the 7 high-power resistors. Mounting the resistors away from the board surface and allowing heat to dissipate through additional PCB vent holes reduces heat buildup in this area.
This board is also known for damage from a leaking electrolytic capacitor, and for faulty LM339 comparators – resulting in intermittent switch errors.

Even when your original board is repaired, you’re still relying on components that have already lived a long service life, and a discoloured PCB.

The MC Circuit Works board is a clean, drop‑in replacement that behaves exactly like the original — same timing, same routing philosophy, same component choices — but built with fresh silicon and clean copper.

For restorations, long‑term reliability, or machines that see regular play, a new board is often a better solution than continuing to patch an ageing original.

- Drops straight in
- Looks and behaves like the factory original
- Uses quality components and connectors
- Matches the original schematic and routing
- Is built for long‑term reliability