sssboa
Super Member
So I tried to figure out how to set the 28V on the EQ Board. My CR-1000's s/n is around 10500 so I prepared myself for the revised EQ board LC63881, I looked at the schematics, coloured what I expected to be the TP points in red in the white page pic attached only to discover that my board is revision LC63882, which I don't have documentation for.
My educated guess for LC63882 was to measure as I showed in the photos, where 2 resistors meet coming from 2SA661 (green transistor) and 2SC1166 (black in the corner). I decided that if I had a measurement quite off 28V to start with I would abandon the whole task.
I measured on one side and great, it was 27.5V already, I left it as it was. I checked the other side, it was 35V. I turned the trimmer just a little bit anticlockwise and it dropped to 11V, so great, reacted to it. Turned halfway back and I got 27.5V. Left it like this. I wonder if I did it all right. Most users don't touch this board.
P.S. Also I uploaded full service manual with the added revision page for EQboard to hifi engine site.
My educated guess for LC63882 was to measure as I showed in the photos, where 2 resistors meet coming from 2SA661 (green transistor) and 2SC1166 (black in the corner). I decided that if I had a measurement quite off 28V to start with I would abandon the whole task.
I measured on one side and great, it was 27.5V already, I left it as it was. I checked the other side, it was 35V. I turned the trimmer just a little bit anticlockwise and it dropped to 11V, so great, reacted to it. Turned halfway back and I got 27.5V. Left it like this. I wonder if I did it all right. Most users don't touch this board.
P.S. Also I uploaded full service manual with the added revision page for EQboard to hifi engine site.
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