Sounds are distorted.

Distorted sound

Cause: The sound board fuse, a torn speaker cone or open voice coil, or the sound board.

Checks

• Check the sound board fuse on the bottom board.
• Look for tears in the speaker cone and measure about 8 ohms across its terminals.

Fix

• Replace the fuse or speaker; otherwise replace the sound board.

Systems

• Gottlieb System 80

Related tips

• How the original System 80 sound board makes sound
• The original sound board self-test only works with S1 and S2 set opposite
• Supplies on the original System 80 sound board
• Original sound board option switches S1 and S2
• Fitting the original sound board PROM
• Fault-finding the original System 80 sound board
• Original sound board connector A6-J1
• Some or all sounds missing

Source: System 80 Service Manual, Gottlieb