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Bally 1977-80 Service Bulletins
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A 42 page collection of service bulletins addressing the earliest BALLY solid state games.
Includes charts for MPU memory jumpers/combinations for the AS-2518-17 and AS-2518-35 games, recommended spare parts kit, update descriptions for the AS-2518-15/16/21 boards, early solenoid driver board modification, corrections to Eight Ball schematic, TE-635-2 test fixture update procedure, detailed procedure for converting AS-2518-17 MPU to AS-2518-35 MPU (electronic sound) capability, and modification of TE-633-2 test set for electronic sound.
Reference:
BLY80SB
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