Atari Centipede Cocktail table game has no power

Arcade Collecting > Restorations & repair

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Mike A:
That is why it is good you brought it up.

vapuser:
Sounds good. I think I'll recheck the voltages from the primary winding at J2 and work my way over to the secondary windings. I did check all the fuses for continuity. they all appear to be fine. I didn't know that you can pull up on the interlock switch to keep it activated. Thanks. I'll keep you posted on my progress. :)

Mike A:
It is surprising how many people don't know that. I have pulled that interlock switch trick on people who know way more about this stuff than I do.

vapuser:
Good morning, Well, as you suggested, I went through and rechecked all the voltages from the power cord to the output of the power supply. I found two bad fuses and replaced them. the original fuses were 7 amp, 250 volt. The closest I could find were 10amp 250 volt. Do you think that the extra 3 amps will put too much strain on the circuit? The output voltages from J5 coming from the secondary winding of the power supply were as follows: Pins 1,5 and 2,5 and 3,5 should read 10.6 VDC. The actual reading was 10.4 VDC. The reading from pins 6 and 76 should be 36 VAC and was 35 VAC. The Reading from Pins 8 and 9 should be 6.1 VAC and actually read 6.2 VAC. The reading from pins 10 and 12 should be 60 VAC and actually read 105.8 VAC which is too high. The other voltages I believe are within tolerance, but that last AC voltage may be causing a problem. Please see attachment. I'm not sure what's causing that problem. Maybe one bad winding on the transformer? More importantly, how can I correct it? I also now need a schematic that shows where those voltages feed into and how to correct that high voltage. Any suggestions? :)

Mike A:
PL1 posted a link to the power supply schematic. The information should be there.

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