Centipede

katoskave

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So my beloved mint Centipede recently stopped working. I checked all voltages and they appear to be good to go. I replaced the big blue, its got a brand new vision pro monitor. So upon further inspection two resistors on the ar2 board were bad. r29 and r30. I replaced both of those and fired it back up and instantly r29 burnt out right away. any ideas?

Thanks!
 
Fuse holder was replaced when the poewr supply was recently rebuilt. I also went through today and replaced the fuses eventhough they were okay. It was blowing the 32volt 20 amp fuse in cabinet but that was shortly after I noticed the bad resistors on the ar2. Any other ideas duder?
 
Check you pcb edge connector..

Any other ideas duder?

Did you do the 1st thing suggested? Those resistors burn when there is excessive resistance on the normal path for +5V (and/or GND) to (or from) the PCB, which causes excessive current thru the sense lines. As local413 suggested, this is almost always due to a bad connection between the molex edge connector and the PCB finger connector.
 
checked and a ok! I am stumped. the pcb shows power the cabinet has power (coin door lights and marquee), no picture on monitor at all and as stated its a new out of the box vision pro (doesnt plug into the cab wiring).
 
I dont remember if the start buttons are doing anything. I checked the connector for any loose wires/damage/corrosion. I even cleaned the pins. I also checked the pcb
 
Well look again at the connector, take a look at all the pins inside.. Make sure there aren't any pushed up or look like they aren't making a tight connection.. As your connector, pcb edge, fuse holders, or AR are prolly the issue.. Once you totally rule those out, then I'd say it's a pcb problem.

Can't remember, did you fully rebuild this AR? Then test all voltages under load?

I dont remember if the start buttons are doing anything. I checked the connector for any loose wires/damage/corrosion. I even cleaned the pins. I also checked the pcb
 
it was fully rebuilt and tested as it was bought that way.
 
I dont remember if the start buttons are doing anything. I checked the connector for any loose wires/damage/corrosion. I even cleaned the pins. I also checked the pcb

That's not enough. In fact IMHO you should replace at least the pins of the supply voltages or better redo the entire connector.

One of the essential first steps. The contacts loose their strength over time.

Made a video about it to show the difference between an old and a new connector:

http://youtu.be/FV1Bb5s8pRU
 
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