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Author Topic: Data East Simpsons not holding settings  (Read 419 times)

Offline busa32927

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Data East Simpsons not holding settings
« on: July 12, 2025, 09:23:01 PM »
hi all

I am working on a Data East simpsons.  The game isnt holding settings.  I checked the batteries and they are good.  not sure what else to check.  Anyone have any ideas?

Thanks
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vids:   robotron, joust w/jrok


pins:  Star Trek premmy, ACDC prem, SW(stern) prem,  BM66 prem, GnR LE, jjp potc le, Woz, The Hobbit,  JP(stern), Godzilla premmy,  AIQ (prem), EHoH. LoTR, CCr, F-14

past pins: TFTC,  MSF, PotC, PotO, BK2K, DM, LAH, BoP, LotR, Hook, Spiderman, GoT, Metallica, IMdn, Munsters, Grand Lizard, WhirlWind, BKSOR, Alice Cooper, RZ, BSD, Firepower, STTNG, TMNT prem, TWD, Gilligan

Offline FUNWIZ

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Re: Data East Simpsons not holding settings
« Reply #1 on: July 13, 2025, 05:48:03 AM »
Measure from the ground braid on the machine to the positive end of each battery and the last one should read 4.5 V or higher. If you’re not getting that reading, then one of the batteries has a corroded terminal on it and you need to clean it. I would strongly suggest you get the Eram put in, so you don’t have to worry about replacing batteries again. 
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Offline HammysHangout ( Hammy )

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Re: Data East Simpsons not holding settings
« Reply #2 on: July 13, 2025, 08:58:26 PM »
check the voltage on the ram when the game is off, you probably have a failed diode.
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Offline busa32927

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Re: Data East Simpsons not holding settings
« Reply #3 on: July 14, 2025, 02:56:08 PM »
Thanks fellas. Gonna relocate the battery pack as it is needed. Then check the voltages. Thanks for the help
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vids:   robotron, joust w/jrok


pins:  Star Trek premmy, ACDC prem, SW(stern) prem,  BM66 prem, GnR LE, jjp potc le, Woz, The Hobbit,  JP(stern), Godzilla premmy,  AIQ (prem), EHoH. LoTR, CCr, F-14

past pins: TFTC,  MSF, PotC, PotO, BK2K, DM, LAH, BoP, LotR, Hook, Spiderman, GoT, Metallica, IMdn, Munsters, Grand Lizard, WhirlWind, BKSOR, Alice Cooper, RZ, BSD, Firepower, STTNG, TMNT prem, TWD, Gilligan

Offline busa32927

  • Level 8: Psi Corps
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Re: Data East Simpsons not holding settings
« Reply #4 on: July 15, 2025, 10:16:16 AM »
New battery pack fixed it. Thanks again.
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vids:   robotron, joust w/jrok


pins:  Star Trek premmy, ACDC prem, SW(stern) prem,  BM66 prem, GnR LE, jjp potc le, Woz, The Hobbit,  JP(stern), Godzilla premmy,  AIQ (prem), EHoH. LoTR, CCr, F-14

past pins: TFTC,  MSF, PotC, PotO, BK2K, DM, LAH, BoP, LotR, Hook, Spiderman, GoT, Metallica, IMdn, Munsters, Grand Lizard, WhirlWind, BKSOR, Alice Cooper, RZ, BSD, Firepower, STTNG, TMNT prem, TWD, Gilligan

Offline k7

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Re: Data East Simpsons not holding settings
« Reply #5 on: July 16, 2025, 02:20:37 PM »
Quote from: busa32927 on July 15, 2025, 10:16:16 AM
New battery pack fixed it. Thanks again.

ya, battery packs look good, but are failed more oftan than not...it's the duracell effect.

cheap easy-to-solder fix with a new replacement.
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