Forum upgrade to SMF 2.1.2, still working on re-theming.
Started by onebaldbloke, March 07, 2021, 11:09:21 PM
Quote from: willpirkle on March 08, 2021, 08:06:55 AMThis is the complete service manual, scanned from my paper version that I got from Bob Gallien back in the 90's -- it has all of the gory details including the digital programming. It is almost 80MB in length and won't fit as an upload, so I added a link from my website below. I have no plan to remove the link, but an admin may want to store it in a more permanent manner on an SSGA server for future use.This is a digitally controlled analog product; e.g. it uses vactrols for channel switching and other routing. It is also a treasure-trove of interesting circuits (log amp for the compressor, use of the LMC835 to implement the GK active EQ filters (in addition to the graphic EQ), noise reduction ckt, even an R/2R DAC). The schematic pages were repeated within the documents, so there are two sets of them (didn't have time to go back and remove them).Enjoy!Will
Quote from: Jazz P Bass on March 10, 2021, 12:32:28 AMThat is one heck of of a circuit description write up!!!You have not noted what is wrong with the unit but a good tech should be able to narrow it down with that excellent info.