Auxiliary lamp driver boards

Games with extra lamps use an auxiliary lamp driver board (A11 or A12). MA-866 uses 2N6043 drivers, while MA-138 uses five NSD-U45 Darlingtons (XO-146) at Q1, Q3, Q5, Q7 and Q9. On the generic board the resistor R13 value is set per game; MA-866 uses 680 k (XO-669) and MA-138 uses 330 k (XO-47).

Systems

• Gottlieb System 80
• Gottlieb System 80A
• Gottlieb System 80B

Related tips

• How driver board lamp latches work
• Driver board A3-J3 lamp groups and relays
• Lamp types: #44 and #67 bulbs
• CPU chips to check for lamp faults
• Checking lamp signals during test step 16
• Original System 80 lamps are #44 bulbs
• Driver board A3-J2 backbox lamps
• None of the controlled playfield lamps work

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