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Author Topic: mpu schematic/pinout  (Read 1779 times)

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Offline Nepa Coin Op

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mpu schematic/pinout
« on: January 20, 2019, 10:03:16 pm »
Im looking to make a fixture to power up 504 boards on my bench when doing repairs, is there any pinout info for them or a full schematic for the boards?


Thanks
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Offline Badbaud

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Re: mpu schematic/pinout
« Reply #1 on: January 20, 2019, 10:58:24 pm »
If you can afford to scavenge a complete harness from a working game then you art 75% there.
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Offline Nepa Coin Op

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Re: mpu schematic/pinout
« Reply #2 on: January 20, 2019, 11:25:47 pm »
im tempted to do that I have a few cabs here I could donate one to science...... I have a few boards here that are totally dead..... get green and all amber mpu lights ......no activity in vfd , no acid damage and good SW ....those are gonna need some poking with the scope which i cant do with it in the machine
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Offline Badbaud

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Re: mpu schematic/pinout
« Reply #3 on: January 21, 2019, 06:58:08 am »
We did it  with the harness from a drop in bar unit, easy sacrifice because not to many people want those systems.
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