The plastic flag that passes through the U opto has broken off a lighted target.

Indianapolis 500 lighted target opto flags snapped off

Cause: The foam pads on each side of the clear target, which stop the flag striking the back of the opto, are missing.

Checks

• Look for missing foam pads on the targets.

Fix

• Wrap duct or electrical tape around both sides of the remaining stub so it sticks to itself, then trim it with a razor blade.
• Fit new 3/16 inch weather foam pads on both sides of each target to protect the others.

Systems

• WPC-Security (WPC-S)

Games

• Indianapolis 500

Related tips

• Indianapolis 500 lighted target: replacing its U opto

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