I rebuilt the ARII in an abused Centipede I picked up a few days ago and everything went well except for the 7905 which controls the -5v line.
After I first rebuilt it, everything worked fine and then I had some issues with the sound and come to find out the -5v line was measuring -10.8v which took out the LM324 on the main Centipede PCB.
I replaced both and had -5v and then after a few hours I measure again and it was back to -11v. The LM324 did not blow but I replaced the 7905 again and it was fine.
Today I measure the -5v line again... and yep... -10.8v.
I've gone over both the ARII and the main PCB and for the life of me I can't figure out what is going on.
Any ideas would be appreciated.
Thanks in advance,
Jeff
After I first rebuilt it, everything worked fine and then I had some issues with the sound and come to find out the -5v line was measuring -10.8v which took out the LM324 on the main Centipede PCB.
I replaced both and had -5v and then after a few hours I measure again and it was back to -11v. The LM324 did not blow but I replaced the 7905 again and it was fine.
Today I measure the -5v line again... and yep... -10.8v.
I've gone over both the ARII and the main PCB and for the life of me I can't figure out what is going on.

Any ideas would be appreciated.
Thanks in advance,
Jeff
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