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VCF problem

by tdh10 on Sun Oct 07, 2018 11:28 pm

Hi. My English is not good but hope you understand me.

When I soldered parts on VCF section, I soldered Q10 in the opposite direction by mistake.
Thereby, it seems that Q21 and C27 was broken.
After replacing them, pin 1 and pin 6 of VR4 still made no signal.

I checked all R and C value, they looks correct value.
Then, I measured all voltages on VCF section, and compared with voltages of Eagle layout which is published in Analogue
Section Reference Voltages thread. I found that some point showed different value, and they show blue figures in attachment.

tdh10
 
Posts: 1
Joined: Sun Oct 07, 2018 11:23 pm

Please be positive and constructive with your questions and comments.