Test the shooter lane switch when chasing trough faults

A closed shooter lane switch is not usually behind random multiball, but on most WPC games it is worth confirming the shooter lane switch is in good condition by rolling a ball over it in switch test T.1.

Systems

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

Related tips

• Full ball trough opto test in switch edge test
• Intermittent trough sensing: cracked header pin solder
• Bench testing a trough transmitter board
• Old and new WPC ball trough designs
• Replacing trough transmitter and receiver optos
• Opto ball troughs from Indiana Jones on
• Remounting early trough opto boards on grommets
• Random multiball from cracked blue resistors on trough boards

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