Search found 57 matches

by ChuckFalcon
Wed Oct 26, 2016 8:04 pm
Forum: HELP!
Topic: HELP Roland Juno 106 3rd voice plays double note
Replies: 14
Views: 1276

Re: HELP Roland Juno 106 3rd voice plays double note

There is a trimmer, vr32 for calibrating the noise level. See if it changes anything. Test tr22 with a multimeter. No need to desolder as it is not in paralel to anything. No changes at all when I turn VR32. I ended up taking TR22 out of the board and tested it it for shorts with my DCA55 and it ch...
by ChuckFalcon
Wed Oct 26, 2016 7:30 pm
Forum: HELP!
Topic: HELP Roland Juno 106 3rd voice plays double note
Replies: 14
Views: 1276

Re: HELP Roland Juno 106 3rd voice plays double note

There is a trimmer, vr32 for calibrating the noise level. See if it changes anything. Test tr22 with a multimeter. No need to desolder as it is not in paralel to anything. No changes at all when I turn VR32. I ended up taking TR22 out of the board and tested it it for shorts with my DCA55 and it ch...
by ChuckFalcon
Mon Oct 24, 2016 8:58 pm
Forum: HELP!
Topic: HELP Roland Juno 106 3rd voice plays double note
Replies: 14
Views: 1276

Re: HELP Roland Juno 106 3rd voice plays double note

So you did the acetone trick to the wave chips? If the "tar blobs" are still intact there´s a remote possibility chip could be saved. Pins 13, 14 are sub out and wave out of voice A, pins 15 and 16 are for sub and wave out of voice B. Notice how pins of those chips are too close to one another, a d...
by ChuckFalcon
Fri Oct 14, 2016 2:38 pm
Forum: HELP!
Topic: HELP Roland Juno 106 3rd voice plays double note
Replies: 14
Views: 1276

Re: HELP Roland Juno 106 3rd voice plays double note

So you did the acetone trick to the wave chips? If the "tar blobs" are still intact there´s a remote possibility chip could be saved. Pins 13, 14 are sub out and wave out of voice A, pins 15 and 16 are for sub and wave out of voice B. Notice how pins of those chips are too close to one another, a d...
by ChuckFalcon
Thu Oct 13, 2016 3:42 pm
Forum: HELP!
Topic: HELP Roland Juno 106 3rd voice plays double note
Replies: 14
Views: 1276

Re: HELP Roland Juno 106 3rd voice plays double note

Voices 3 and 4 are generated by the same chip. Use a magnifying lens to detect any stray solder bridges. Poly 2 always starts with voice 1. Press c1 and hold, then d1 and hold then c3. C3 will play voice 3. How does it sound? then press c4. C4 will be voice 4. How does it sound? Then lift c1 and d1...
by ChuckFalcon
Wed Oct 12, 2016 9:57 pm
Forum: HELP!
Topic: HELP Roland Juno 106 3rd voice plays double note
Replies: 14
Views: 1276

Re: HELP Roland Juno 106 3rd voice plays double note

Swapping the voice chips tells you it's not the voice chip. Have you re-calibrated anything?...after acetone bath I have found this necessary. Carefully check the power supply calibration under load as well, make sure there the DC output is within spec. Otherwise you'll have to trace the signals in...
by ChuckFalcon
Wed Oct 12, 2016 3:36 pm
Forum: HELP!
Topic: My Juno 60 is dead. Any help?
Replies: 11
Views: 1705

Re: My Juno 60 is dead. Any help?

[/quote]
Most synths from the era have a CPU/memory protection circuit when the battery starts dying. Test the battery with a DVM to eliminate it as suspect.[/quote]

The battery is reading 3.2V so I guess its good. I was really hoping it was the problem. At least we can eliminate that as an issue.
by ChuckFalcon
Wed Oct 12, 2016 3:31 pm
Forum: HELP!
Topic: HELP Roland Juno 106 3rd voice plays double note
Replies: 14
Views: 1276

Re: HELP Roland Juno 106 3rd voice plays double note

I discovered the pattern this morning. When the 3rd voice fires, it plays exactly what the 4th voice played LAST time. EXAMPLE: First pass: (V1)C, (V2)D, (V3)E, (V4)F, (V5)G, (V6)A Second pass: (V1)C, (V2)D, (V3)E and F, (V4)A, (V5)B, (V6)C Third pass: (V1)C, (V2)D, (V3)E and A, and so on.... ALSO.....
by ChuckFalcon
Tue Oct 11, 2016 11:55 am
Forum: HELP!
Topic: My Juno 60 is dead. Any help?
Replies: 11
Views: 1705

Re: My Juno 60 is dead. Any help?

garranimal wrote:Check the internal battery?
I thought that the battery was only there to save memory. It is possibly bad but I can't even get to the part to attempt to make a preset to save yet.
by ChuckFalcon
Tue Oct 11, 2016 11:51 am
Forum: HELP!
Topic: My Juno 60 is dead. Any help?
Replies: 11
Views: 1705

Re: My Juno 60 is dead. Any help?

Thanks for all of the info! Noob question: what are the "uC"'s that you are talking about? If that is the main CPU chip then. I am thinking that it may possibly be an issue with one of those chips because it as though its not even booting up, but then again it could be about anything. Check to see t...
by ChuckFalcon
Tue Oct 11, 2016 11:41 am
Forum: HELP!
Topic: HELP Roland Juno 106 3rd voice plays double note
Replies: 14
Views: 1276

HELP Roland Juno 106 3rd voice plays double note

Hey everyone,I have an old Roland Juno 106 that I love and it works perfectly EXCEPT, that while using the triangle wave, every 3rd voice will play a double and possibly a triple note. Ive already done the whole acetone bath for my voice and waveform chips and it didn't help it at all. Here is a vid...
by ChuckFalcon
Wed Oct 05, 2016 10:33 pm
Forum: HELP!
Topic: My Juno 60 is dead. Any help?
Replies: 11
Views: 1705

Re: My Juno 60 is dead. Any help?

BUMP
by ChuckFalcon
Fri Sep 30, 2016 8:22 pm
Forum: HELP!
Topic: My Juno 60 is dead. Any help?
Replies: 11
Views: 1705

My Juno 60 is dead. Any help?

Hi everyone! The Roland Juno 60 is my favorite poly. I have had 2 (working) in the past but I have since traded or sold them. I found one recently on the cheap because it doesn't work. Here is what it DOES do when I turn on the power: -The LED about the "hold" button lights up -None of the other LED...
by ChuckFalcon
Mon Jan 19, 2015 10:51 pm
Forum: HELP!
Topic: Roland Juno 60 Minerva Midi Mod Installation Problems
Replies: 0
Views: 999

Roland Juno 60 Minerva Midi Mod Installation Problems

Hi everyone! I am the proud owner of a big fat Roland Juno 60 and I love it. I love it so much I wanted to give it midi. Like many others I ordered the Minerva Midi Mod. I started to install the Minerva yesterday and I ran into a some confusion and maybe someone could help who has already installed ...
by ChuckFalcon
Fri Aug 22, 2014 11:26 pm
Forum: General Synthesizers
Topic: Anyone get any good Juno or Jupiter sounds from an A Station
Replies: 18
Views: 2309

Re: Anyone get any good Juno or Jupiter sounds from an A Sta

I loved my Juno 106 that I got repaired from Synth Spa but noticed that there WAS NO chorusing happening because he took mine out and didn't put them back when he gave them to me. What the h**l man :shock: I did, I called, texted, and emailed and he kept on and kept on saying I am about to send tho...