Sound board beep codes before DCS

At power-on, alphanumeric, dot matrix and Fliptronics games' sound boards beep: 1 beep, board OK; 2 beeps, U9 sound ROM bad; 3 beeps, U18; 4 beeps, U15; 5 beeps, U14.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics

Related tips

• Pre-DCS sound board A-12738
• Pre-DCS sound boards are tuned per game
• Pre-DCS sound cuts out after the game warms up
• Sound board beep codes at power-on (pre-DCS)
• Adding a line out to the A-12738 sound board
• Volume stuck at full and buttons do nothing (pre-DCS)
• Sound board fuse F501 blows at power-on (A-12738)
• Pre-DCS speakers pop and get damaged, LM1875 runs hot

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