Sound module -32 and -50 test points

Sound module -32: TP1 +5 V, TP2 ground, TP3 +11.9 V, TP4 +43 V, TP5 +43 V solenoid return. Sound module -50: TP1 +5 V, TP2 ground, TP4 +43 V (TP3 not given).

Systems

• Bally MPU AS-2518-17
• Bally MPU AS-2518-35
• Stern MPU-100
• Stern MPU-200

Related tips

• No sound from the AS-2888 sound board: repin, then check U11 and U8
• Identifying AS-2518-51 and AS-2518-56 sound boards
• AS-2518-51/-56 sound board jumpers
• Bench-test a -51/-56 sound board with a test EPROM
• No sound at all: start with the amplifier hiss
• Which -51/-56 sound ROMs respond to the board test button
• Squawk & Talk -61 and Say It Again -81 test points
• Sound board chip 86L93 can be replaced by a 74LS93

Source: Voltage Test Points on the Boards