MPU has no flashes. TP2 has no voltage. Reflowed solder on the driver board. All fuses test good. Not sure how to test the AC voltage at the driver or if those voltages will effect the 12v at the MPU. Driver has all the proper DC voltages.
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MPU has no flashes. TP2 has no voltage. Reflowed solder on the driver board. All fuses test good. Not sure how to test the AC voltage at the driver or if those voltages will effect the 12v at the MPU. Driver has all the proper DC voltages.
TP1 is 5.2v, Test Point 3 14v
Changed the 6803 CPU chip and now the game has a solid LED on the MPU board. At first I think it blinked about 3 times, but hasn't done that since, only one solid LED at power on.
Changed the 6803 cpu chip, no change. Programmed the U2/U3 roms, no change. tested the 6821 pias (were good) no change. What I did notice is the U2 Rom is getting hot quickly. Thoughts?
Voltages at MPU are all good.
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