Dave Horne Posted July 14, 2003 Share Posted July 14, 2003 Hi, there's probably an article re a modification of a Roland A-80 in that issue. This involves the substitution of a resistor. Does anyone have this issue in their garage? Thanks, Dave No guitarists were harmed during the making of this message. In general, harmonic complexity is inversely proportional to the ratio between chording and non-chording instruments. Link to comment Share on other sites More sharing options...
Markyboard Posted July 14, 2003 Share Posted July 14, 2003 Hi Dave: I dont have the EM you are looking for. But when I looked at the link for your previous post where they describe the resistor change, something sounded familiar. So I pulled out my A-80 service manual(I keep these even after I sell the unit) and looked at the schematics. Sure enough I have R43 on the Main-A board circled with a 15 k value drawn next to it(by me). This wa probably from verbal instructions I received from Roland many years ago. It shows originally a 5.6K for the A80 and an 18K for the A-50. I circled 3 diodes right next the resistor also but I dont reacall why. Whats worse, I dont remember if I actually made the resistor change or not. If I did I dont think it helped. If I didnt I cant remember why else I opened up the unit. I never had any other problems with it. Anyway I have the service manual so if I can be of any help let me know. I can steer you to the resistor if you dont find another source of info. Link to comment Share on other sites More sharing options...
Dave Horne Posted July 14, 2003 Author Share Posted July 14, 2003 Marky, I'll take a look at my owner's manual. I opened up my A-80, but there were two resistors where I thought there should have been one and it was not the R43 location (as per another set of instructions on the internet). I am still waiting to hear back from Roland. I don't feel confident doing the work myself now because those resistors are so damn small. I can not see the color strips accurately without a magnifying glass. It's wonderful getting old and reading things at arm's length. The variable resistor approach does seem the way to go though. No guitarists were harmed during the making of this message. In general, harmonic complexity is inversely proportional to the ratio between chording and non-chording instruments. Link to comment Share on other sites More sharing options...
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