Filter capacitors and GI triacs that fit WPC boards

The +5 and +12 V supplies use 15,000 uF 25 V snap-in capacitors; driver board C4 is a 470 uF 25 V electrolytic. GI triac ratings are not critical: BT138-600E, BTA12-600, NTE5671, NTE56010 or NTE56008 all work.

Systems

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

Related tips

• WPC-95 filter capacitors are smaller (10,000 mfd)
• Checking a filter capacitor for ripple
• Driver board filter capacitors wear out
• Choosing a replacement driver board filter capacitor
• Pre-WPC-95 bridges, filter caps and fuses by supply
• WPC-95 rectifier diodes, filter caps and fuses by supply
• +20 V filter capacitor C11 (C10 on WPC-95) blows apart
• WPC-95 LED101 off (+5 V, game will not boot)

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