Replacement five-leg U slot opto (WPC-95)
The Williams part for the five-leg U opto is 5490-14575-00, described as an integrated Schmitt opto, 10 mA. Parts marked QTE734, QT724, QT850 or QT902 have been seen in that position. The Fairchild H22LOI is a working replacement.
Systems
Related tips
- WPC-95 five-leg Schmitt trigger U optos
- Fitting a replacement U slot opto the right way round
- Opto styles used in WPC games
- Where WPC games use opto switches
- Some WPC-95 optos can fail even when they test good
- Mounting a replacement opto receiver
- How WPC opto switches work and which half fails
- Replacement opto transmitter and receiver pinouts
Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Three, Clay Harrell (pinrepair.com)