Driver board MA-295 transistor complement
The driver board uses MPS-U45 Darlingtons (XO-306) for Q1-Q4, Q13-Q32, Q45-Q52, Q54-Q57, Q61 and Q63; MPS-A13 Darlingtons (XO-304) for Q5-Q12 and Q33-Q44; 2N6043 (XO-303) for Q53, Q59 and Q60; and 2N3055 power transistors (XO-301) for Q58, Q62 and Q64. Latches Z1 to Z12 are 74175 (XO-410) and Z13 is a 7404 (XO-402).
Systems
Related tips
- Test the driver transistors while the board is out for the ground mod
- What the System 80 driver board transistors drive
- System 80 driver board transistor types
- How driver board coil transistors are switched
- Relay and coin counter transistors on the driver board
- Some 80B driver boards use the coin counter transistors
- Test driver board outputs by grounding transistor tabs
- Driver board transistors that look stuck on in a test fixture
Source: Premier Technology Parts Catalog (System 80, 80A and 80B), Gottlieb / Premier