Sound board beep codes, WPC-DCS and WPC-S

1 beep means the sound board is OK. 2 to 9 beeps point to a failed sound ROM at U2 to U9 respectively (2 beeps U2, 3 beeps U3, and so on up to 9 beeps U9).

Systems

• WPC DCS
• WPC-Security (WPC-S)

Related tips

• DCS or WPC-95 sound faults: amps and op-amps
• Loud foghorn noise at power-on after recapping the DCS sound board: broken through-hole
• Deafening hum at power-on: cracked ground trace at the DCS sound board filter caps
• Sound cuts out or a rising shriek after a few minutes
• Line out on DCS and WPC-95 sound boards
• WPC sound board versions
• The WPC sound board runs on its own
• WPC speakers are all 4 ohm

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