Type 1 and Type 2 flipper opto boards

Type 1 flipper opto boards have a vertical interrupter slot and a metal interrupter; Type 2 boards have a horizontal slot and a plastic interrupter. All versions plug into each other's harness, but the interrupters are not interchangeable between Type 1 and Type 2, so buy the style your game came with. Type 2 boards were used from Indiana Jones to Cactus Canyon, with a small change around WPC-95 to the 5-leg Schmitt trigger slot opto.

Systems

• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• Games that came with Type 2 flipper opto boards
• Moving the spare opto on a flipper opto board (two-flipper games)
• Two LM339s on the Fliptronics board read the flipper optos
• Flipper dead because the Type 2 plastic interrupter warped
• How Fliptronics flippers work
• How Fliptronic flipper drive works
• Flipper coils have two windings
• Fliptronic flipper test points

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