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(Topic ID: 203304)

williams high speed system 11 game over error

By Bmag

6 years ago



Topic Stats

  • 7 posts
  • 4 Pinsiders participating
  • Latest reply 6 years ago by Bmag
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#2 6 years ago
 
DAV

wayout440

Pinside member

US Berea, OH

11y 113K 11,264 3 12

Was there any corrosion at all around the battery holder?

Got a DMM/Voltmete? - test the power supply voltages, especially logic +5VDC and A/C ripple.

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#4 6 years ago
 
DAV

wayout440

Pinside member

US Berea, OH

11y 113K 11,264 3 12

MPU IJ17 Pins 4,5,6 = +5.03 VDC @8.1 mV AC ripple
U26/U27 ROM Pin 1 = +4.91 VDC

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