Power supply MA-114 test points and +5 V adjust

The MA-114 power supply board (A2) has labelled test points: TP1 for +60 V, TP2 for +42 V, TP5 for +8 V, TP4 for +5 V and TP3 for ground. The +5 V output is set with the 500 ohm trimmer POT1 (XO-101). The board also carries two LEDs, DS1 and DS2 (XO-268), and an S107Y1 SCR (XO-451) at SCR1.

The board carries +60 V and the transformer feeds line voltage nearby; measure with the game on only when needed and keep fingers off the high-voltage parts.

Systems

• Gottlieb System 80
• Gottlieb System 80A

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Source: Premier Technology Parts Catalog (System 80, 80A and 80B), Gottlieb / Premier