Roland JUNO-6 -1981    Weight=26 Lbs. Number Manufactured = 14,000 MRP = $1295

User Manual: Roland US
Reset Proceedures: N/A
Operating System code: N/A
MIDI or other control protocol: N/A
Software related Links: N/A
Patches or knob settings:
Circuit Overview: below
Scematics/Service Manual: fdiskc archive or Manual Manor
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: 8049 CPU, IR3109 VCF, BA662 VCA, IR3R01 EG, MN3009 BBD, MN3101 BBD clock
Modifications:JUNO-66 upgrade adds sequencer,MIDI, portamento, keying modes, 2nd EG!
General Info Links: Vintage Synth Explorer

Circuit Overview:
     Digitally controlled oscillator subtractive synth (essentially a JUNO 60 w/out storage). Nice board layout. Everything except bender stuff and front panel and power supply is on one board.

Service Tips:
      My VCO bender amount pot went open. I was able to repair but noticed that if one really did go bad these are the same as Moog pots that I have in stock, except non-structral legs would need to be bent and wired to a wire that could be also bent at a 90 to allign to Roland's hole spacing. Not sure if Roland can still supply these so figured that might be useful to someone :-). Roland had a service bulletin about some of the IR3Ro1 EG's. I couldn't make heads or tails out of it. It sounded like some of them ruptured or something and that you had to be careful to get the right lot number or like that. Pretty comical use of Engrish :-).

Buttons are being nicely 3D printed by Savage Electronics. Roland still stocks many parts for older instruments! You can always order them through your local Service Center and see what happens! Otherwise I have some parts also so don't hesitate to ask. (Last I heard they were running low on the commonly failing filter modules for JUNO's. I get out the dremel tool and go to work on that broken one setting in my window? :-) )
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