Hi all!
Hope everyone is doing great. ?I'm still working on a major CS80 overhaul and was getting ready to put in a couple hundred 25-turn trimmers. ?The first ones I went to replace were the 8 for the output buffers on the KAS (right edge of schematic here -?http://therogoffs.com/cs80/manuals/CS80_Service_Manual/04%20-%20KAS%20schematic.jpg). ? The schematic and board layout and big, fold-out overall schematic all show these as 100k. ?However, all the trimmers on the board are actually 10k. ?I don't have another CS80 sitting around so I was hoping someone could verify whether the documentation is wrong or this board has the wrong parts!
While I'm at it, I thought I'd list other errors in the service manual. ??
The first are on the KAS board layout (?http://therogoffs.com/cs80/manuals/CS80_Service_Manual/05%20-%20KAS%20Circuit%20Board%20&%20Wiring.jpg ).
The pins outs for the big, 40-pin KAS and DAC chips are labeled backwards. They should be like all DIP/SOIC parts with pin 1 on the upper-left pin (with the notch indicating the top) and then counter-clockwise around to pin 40. ? This could really mess someone up trying to do any repairs or modifications who's not experienced with electronics (and who probably, therefore, shouldn't be in there!).
I've been working on fixing these and will be uploading my corrected versions soon. ?Please let me know any others you know of and also about the 10k/100k trimmers on the KAS.
?DAvid
