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Re: Troubleshooting a 250 model 1 Bass amp [message #27402 is a reply to message #27401] Thu, 27 June 2019 21:03 Go to previous messageGo to previous message
Byteviolator is currently offline  Byteviolator
Messages: 13
Registered: June 2019
Junior Member
I have plus and minus 11.66V on the terminal points so the supply looks Ok.
Lots of issues with the ICs however

PC5066

1. -11.48V 14. 11.73V
2. 13. -10.72V
3. 12.
4. 11.
5. 10.
6. .09V 9. -.33V
7. -11.72V 8. -8.23V

PC5067

1. 3.08V 14. 11.66
2. 13. -11.22
3. 12.
4. 11.
5. 4.2mV 10.
6. .22V 9.
7. -11.66 8. -.69

Could other components cause these weird measurements or am I looking at 2 bad ICs?

Thanks for your help.

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