68kMLA Classic Interface
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| Click here to select a new forum. | | Classic analog board 0 Volt | Posted by: dochilli on 2018-01-04 08:32:12
I have two classic analog boards that show 0 volt at the floppy port. I measured the volts at cp22 and one had 45 Volts, the other had 0 volt. At a functioning board I measured 90 volts, but I read in another thread that there should be 300 volts. Anay ideas, where I can find the defect part?
| Posted by: dochilli on 2018-01-05 11:14:17
Short summary:
Board nr. 1 had a defect TDA4605. I changed it and the board came back to life.
The second board had 0 Volts at cp22 and the large electrolytic caps. I found that the power cord connector on the board was cracked. I resoldered it and the board worked. It was the first time that I saw a cracked power connector. All three solder joints were broken!
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