Does any one know why channels 1 to 8 do not work but 9 to 16 are ok. Fuses are ok, all wiring is ok. I measured 169 ohms from hot to neutral on 9 to 16 side and open on the 1 to 8 side.
I have swapped the fuses, and made the following measurements:
All are Vac:
Good Bad
Neutral to q0 through q7 20V, neutral to q8 through q15 120V.
Neutral to U19.1 20V U11.1 20V
Neutral to u19.2 20V 20V
.3 8v 9V
4 27V 13V
5 9V 8V
6 12V 21V
Neutral to R20 through R27 28V, neutral to R7 through R14 15V
Neutral to heat sink 40V 20V
Neutral to A1 28V 15V
A2 120V 20V
Gate 28V 15V
Thanks for your help!!
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