Lamp driver, auxiliary lamp driver and display driver test points

Lamp driver: TP1 +5 V, TP2 ground (TP3 exists only on the AS2519-23 version). Auxiliary lamp driver: TP1 +5 V, TP2 ground. Score display driver boards: TP1 +5 V, TP2 +190 V, TP3 ground.

Display board TP2 carries about 190 V DC.

Systems

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

Related tips

• Auxiliary lamp driver boards: SCR to connector pin
• AS-2518-14 vs AS-2518-23 lamp driver boards
• Substitute SCRs for the lamp driver board
• Lamps on the auxiliary lamp driver board do not work
• Lamp driver board layout: SCRs, decoders and connectors
• Lamp driver board: which SCR drives which connector pin
• Lamp data and select lines: MPU J1 and lamp driver J4 pins
• Auxiliary lamp boards drive special backbox lighting with MCR106 SCRs only

Source: Voltage Test Points on the Boards