Author Topic: Tech Tip: Sound Load - Midway Pinball - A-12738-XXXXXX Sound Board  (Read 71 times)

Offline Hamster

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Game volume is really load, having to set volume down to 1-2 to prevent you from going deaf.

R19 on the Feedback Circuit on the Amp was stuffed with a 22K Resister, The schematics showed 10K.. Replaced R19 22K with 10K...

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Offline Marshall

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Re: Tech Tip: Sound Load - Midway Pinball - A-12738-XXXXXX Sound Board
« Reply #1 on: October 25, 2020, 02:44:36 PM »
What game?


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Offline Hamster

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Re: Tech Tip: Sound Load - Midway Pinball - A-12738-XXXXXX Sound Board
« Reply #2 on: October 25, 2020, 10:54:28 PM »
What game?


Pretty much any 90's Bally/Midway.  Basically if its super loud and you have to turn it down to < 8 , it probably has a larger then 10K resister..

http://www.coinopflorida.com // http://freeplayflorida.com

"Good engineers keep thick authoritative books on their shelf. Not for their own reference, but to throw at people who ask stupid questions. Hoping a small fragment of knowledge will osmotically transfer with each cranial impact."-eeguru


pins: TSPP, AMH, T3, ST:TNG, ST:LE, RCT, DW. DE:ST, DP , AbraCaDabra
vids: Q*bert, Mad Planets, Reactor, (2) Sega Uni, Linked OR2SP, APB, Crystal Castle, Taito Classics, Cloak and Dagger, MSPAC, Space Duel, Gravitar, Tempest, Omega Race, Tutankham, Warlords [custom]