WPC-95 uses discrete P600D diodes instead of bridges

WPC-95 driver boards replaced each bridge with four separate diodes, D7-D22, spreading the heat; they rarely fail. The diodes are P600D (also sold as 6A4 or 6A400, 6 A 400 V); NTE5814 substitutes. They replaced MB3502W/MB352W bridges. WPC-95 boards also use the smaller "T" style fuses.

Systems

• WPC-95

Related tips

• Replacement bridge rectifier and diode ratings
• Testing a WPC-95 rectifier diode
• WPC-95 rectifier diodes, filter caps and fuses by supply
• WPC-95 LED101 off (+5 V, game will not boot)
• Check fuses F106/F101 with no lamps and no game start: shorted bridge diode
• WPC-95 driver board LEDs and test points
• Filter capacitors and GI triacs that fit WPC boards
• Supplies made on the WPC power driver board

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