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5V Voltage Regulator - LM323K Replacement (SEE NOTES):

Price: $13.09 each

Status: In Stock
(1 Available)



Part #: LM323KA
Condition: New
Modern solid-state replacement switching voltage regulator that replaces the obsolete and hard-to-find LM323K. TO-3 footprint. Fits and functions just like the original part, but dissipates less heat, and has higher efficiency. This is also a no-noise regulator, which reduces or eliminates discharge noise that is typically heard through speakers at power-off.

Includes a built in trim pot to make fine adjustments to the output voltage. Rated at 5 volts, 3 amps, 20v maximum input.

  • Installation: New nuts and washers are included for proper installation. We recommend NOT using the original KEPS nuts that held your old regulator in place, as the star washer built into them may come in contact with some of the surface-mounted components on this new replacement unit.
  • Bally & Stern Games (1977-1985): Installation on solenoid driver / voltage regulator board in these games requires replacing (or bypassing) the R50 resistor with a jumper wire or zero-ohm resistor, otherwise output voltage will be too high, and exceed board design tolerances. If output voltage is too low after installation and adjustment of on-board trim pot, we suggest installing a resistor at location R50 with very low resistance (10 ohms to start, for example) to bring voltage up (some experimenting with resistor values at this location may be necessary to achieve proper output voltage).
  • All Games: Bench-test after installation. This ensures no other boards/components will be damaged if output voltage is too high, and/or if a fault is present from installation. Adjust output voltage using on-board trim pot. If voltage is too low, a resistor may be added between collector (chassis/case) and ground. Some games may require cutting ground trace to achieve this modification. We suggest starting with a low-voltage resistor (10 ohms, for example). Some experimenting with resistor values between collector and ground may be necessary to achieve proper output voltage.
Replaces Bally E-710, Lambda LAS 1405, National LM323K, Fairchild 78H05KC, Stern 25A-LM-323-K, Williams 5250-12634-00 and 5A-9049, 15-50323-001, and others.

If you have high voltage on both sides of your regulator, have a problem with low 5vdc power, or if your game is intermittently resetting or not starting up, you could have a bad regulator. Replace for a healthy power supply!

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NOTE: No returns on Electronics - all sales final.

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    Used In The Following Games: (The list below may not be complete, and it's accuracy is not guaranteed. Contact us if you have any questions.)
    BALLY: Addams Family, Addams Family Gold, Black Jack (electronic), Black Pyramid, Black Rose, BMX, Centaur, Centaur II, Corvette, Creature From the Black Lagoon, Cybernaut, Doctor Who, Dolly Parton, Eight Ball, Eight Ball Champ, Eight Ball Deluxe, Elektra, Evel Knievel (electronic), Fireball Classic, Fireball II, Flash Gordon, Freedom (electronic), Frontier, Future Spa, Gilligans Island, Gold Ball, Grand Slam (Bally), Harlem Globetrotters, Harley Davidson (Bally), Hotdoggin', Indianapolis 500, Judge Dredd, Kings of Steel, KISS (Bally), Lost World, Mata Hari (electronic), Medusa, Mr. & Mrs. Pac-Man, Mystic, Night Rider (electronic), Nitro Ground Shaker, Paragon, Party Zone, Popeye Saves the Earth, Power Play, Rapid Fire (Bally), Rolling Stones (Bally), Shadow, Silverball Mania, Six Million Dollar Man, Skateball, Space Invaders, Speakeasy, Spectrum, Spy Hunter, Star Trek (Bally), Strikes and Spares, Supersonic, Theatre of Magic, Twilight Zone, Vector, Viking (Bally), Voltan, WhoDunnit, World Cup Soccer '94, X's & O's, Xenon

    STERN: Ali, Big Game, Catacomb, Cheetah (Stern), Cosmic Princess, Dracula (Stern), Dragonfist, Flight 2000, Freefall (Stern), Galaxy (Stern), Hot Hand, Iron Maiden (1982) (Stern), Lazer Lord, Lectronamo, Lightning, Magic (Stern), Memory Lane, Meteor, Nine Ball, Nugent, Orbitor 1, Pinball (Stern) (electronic), Playboy (Stern), Quicksilver, Seawitch, Split Second, Star Gazer, Stars, Stingray, Trident, Viper, Wild Fyre

    WILLIAMS: Algar, Alien Poker, Barracora, Black Knight (early), Blackout, Contact, Cosmic Gunfight, Demolition Man, Dirty Harry, Disco Fever, Dracula (Williams), Firepower, Firepower II, Fish Tales, Flash, Flintstones, Funhouse, Getaway High Speed II, Gorgar, Hot Tip (electro-mechanical), Hot Tip (electronic), Hurricane, Indiana Jones (Williams), JackBot, Johnny Mnemonic, Jungle Lord, Lucky Seven (electro-mechanical), Lucky Seven (electronic), Machine: Bride of PinBot, No Fear, Pharaoh, Phoenix (1978), Pokerino, Road Show, Scorpion, Solar Fire, Star Trek: The Next Generation, Stellar Wars, Strike Master (shuffle), Terminator 2, Time Fantasy, Time Warp, Tri Zone, White Water, World Cup

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