Mounting a replacement opto receiver

Fit the receiver with its flat edge in the hole furthest from the notch drawn on the circuit board. Some three-legged replacement receivers need the centre leg snapped off first, then the notch at the base lined up with the notch drawn on the board.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• Testing an opto receiver
• Replacement opto receiver dead or weak: try it with the notch the other way
• Telling an opto transmitter from a receiver
• Replacement five-leg U slot opto (WPC-95)
• Fitting a replacement U slot opto the right way round
• Bookcase opto still dead after a new receiver: the replacement part was bad
• Opto parts to keep on hand
• Opto styles used in WPC games

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Three, Clay Harrell (pinrepair.com)