Sounds Plus -56 and Vocalizer test points (Xenon)
Sounds Plus -56: TP1 +11.9 V, TP2 +5 V, TP3 ground, TP4 0 V silent and about +2.5 V with sound, TP5 2.5 V. Vocalizer: TP1 ground, TP2 +5 V, TP3 analog out, TP4 digital in, TP5 speech clock.
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Games
Related tips
- Sound Plus -56 and vocalizer test points
- Xenon vocalizer: hot diodes, hum, or game will not run with it attached
- Speech crackles even after a board repair: repin the driver board connectors
- Background sounds clear but the speech has heavy static: recap and reflow the sound board
- Sound module -32 and -50 test points
- Identifying AS-2518-51 and AS-2518-56 sound boards
- AS-2518-51/-56 sound board jumpers
- Bench-test a -51/-56 sound board with a test EPROM
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part One, Clay Harrell (pinrepair.com)