How the System 80 driver board is laid out
The driver board has three sections: lamp drivers, coil drivers and a sound command buffer. Its input is J1 and its outputs are J2 to J6. Four sections of a 7404 inverter (Z13) flip the sound select signals and send them on to the sound board.
Systems
Related tips
- Which transistor types sit where on the driver board
- A driver board output is stuck on or dead
- What each System 80 board does
- Driver board A3-J5 and A3-J6
- What the System 80 driver board transistors drive
- System 80 driver board transistor types
- How driver board lamp latches work
- Control board A1-J4 to driver board pinout
Source: System 80 Service Manual, Gottlieb