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p_wats
Copper Member
Canada
11 Posts |
 Posted - 09/18/2009 : 17:12:59
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Hi, I'm new to the forum and was just hoping to find some help with my RDD-20 Digital Delay.
It is currently completely missing the "Fine" pot (not just the knob) and I was hoping someone could tell me the value I would need, as I'd like to replace it.
I searched the forum and saw the internal pictures thread, but unfortunately the value number on the pot was just out of focus.
Any help would be greatly appreciated. Thanks!
Paul |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 09/18/2009 : 17:44:02
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Hi p_wats
Welcome to the forum from Australia.
According to the notes.
Delay Time Fine (VR-1) is a:
50KB pot.
Roland Boss part numbers.
13219342 EVH-6PA332B54 50KB DEPTH/FINE/DELAY LEVEL
I hope this helps.
Regards Dr. Bob  |
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p_wats
Copper Member
Canada
11 Posts |
Posted - 09/18/2009 : 19:50:11
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| Wow, Dr. Bob, that was fast! Thanks a ton. Now I just need to find one (in Toronto). |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 09/20/2009 : 12:05:07
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Hi p_wats
You are welcome.
Please keep us up to date with the status of your repair/s.
Perhaps a few pics, if you feel that way inclined.
Regards Dr. Bob |
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p_wats
Copper Member
Canada
11 Posts |
Posted - 09/21/2009 : 02:39:03
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| Will do! Do you know of anywhere that I can order this part from? I couldn't find a suitable replacement in my local shop this weekend. |
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starr36
Platinum Member
Canada
1172 Posts |
Posted - 09/21/2009 : 03:45:20
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| order direct from Roland Canada; but order MORE parts than you need because they have a minimum charge. If you plan on collecting or already use a lot of boss pedals, order replacement springs (the one under the foot pedal) maybe some of those black thumb screws that hold the battery compartment shut, and a dozen of the rubber grommet where the battery compartment screw rides .... |
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p_wats
Copper Member
Canada
11 Posts |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 09/23/2009 : 14:47:46
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quote:
Originally posted by p_wats
Hmm, I think one of these ought to be perfect:
http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=310168357676&ssPageName=STRK:MEWAX:IT
Someone wants to buy this from me as is, but I think this could be a morale boosting repair (much easier than the Juno 106 I'm working on).
Hi p_wats
--- Off topic a bit ---
The Juno 106 Keyboard synths,
used to typically kill the VCF - VCA - tone, Roland-Custom hybrid IC's. In SIP packages.
I repaired a few Juno 106's back in my younger days.
This was PRE-INTERNET. Can anyone actually remember what we did before the net?
As I recall, these Roland-Custom Hybrid IC's were very difficult to obtain.
(It's good to have friends in the trade).
The Juno 106 service manual used to be available on the net,
last time I search for it, about 4-6 years ago.
With the current age of the Juno's I would also replace all the electrolytic caps, where possible, & especially in the power supply.
Regards Dr. Bob |
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p_wats
Copper Member
Canada
11 Posts |
Posted - 09/23/2009 : 17:05:42
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Hey Dr. Bob, thanks for the info!
I don't think I was of legal soldering age before the internet. Ha.
As for my Juno projects, I've actually got two on the go (one for me and one for a band). Mine just needs some faders replaced at the moment, though I'm counting the days for the voice chips to die.
The other is perfect aside from a dead voice chip. You can get clones of the old chips that are supposedly identical and won't die (the tech I spoke to uses these exclusively now). But I'm trying a new experimental treatment of removing the resin from the coated chip by soaking it in acetone. People have had great success with this recently (there are several threads and Youtube videos on it).
Of course, at the end of the day it's a dead chip, so I've got nothing to lose!
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 09/24/2009 : 17:29:26
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Hi p_wats
-- off topic again ---
You are welcome to start a new thread on Juno 106 repairs
or links to the repair info, like the stuff on the Clone Hybrid IC's,
and the info on removing the resin & repairing the Hybtid IC's.
There are quite a few of us here that also have synth gear.
As this is very interesting stuff, & new info to me as well.
And to be really honest, I have been searching for another JUNO 106.
I had a bit of a clean up the the other day.(Laure I can hear you ROTFL)
& I located the small collection of S/H working hybrid's that I put into long term storage.
In that same clean up I found my Juno 106 service notes, but time was very unkind to them.
I have a few older & almost impossible to own synths as VSTi's
But it's not the same as having real knobs-faders & buttons to play with.
Regards Dr. Bob |
Edited by - Dr. Bob on 09/24/2009 17:33:33 |
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phostenix
Gold Member
USA
754 Posts |
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p_wats
Copper Member
Canada
11 Posts |
Posted - 09/25/2009 : 05:23:26
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Ha, yeah, I wasn't sure about that either, but the shaft length looks just right, so I'll give it a try at least.
Dr. Bob, update on the Juno 106: I finally got all the resin coating off of the bum voice chip and re-installed it this afternoon. Seems to be working just fine! |
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p_wats
Copper Member
Canada
11 Posts |
Posted - 10/03/2009 : 21:28:13
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Ok, so I got a pot that will fit (slightly shorter than the others, but still pokes out enough to put a knob on it when I get one).
The only problem now is that in opening it up I realized the previous owner had ditched the Mod Bus jack in favour of wiring the missing Fine pot to an expression jack in its place. The 1/4" jack they used doesn't match the others on the board and I don't have a spare that fits.
Can anyone help me figure out how to appropriately wire one of my jacks in it's place (and also maybe explain what the mod bus jack even does)?
This is a jack that I've got kicking around. Looks very similar to the ones installed, but the connections don't line up perfectly.
Here's the one they had wired into the fine slot.
Any help getting either of these to fit would be very much appreciated!
Thanks! |
Edited by - p_wats on 10/03/2009 21:33:12 |
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p_wats
Copper Member
Canada
11 Posts |
Posted - 10/09/2009 : 00:04:23
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| Any ideas? I don't have an expression pedal to test it with and can't find the manual online anywhere to see what sort of pedal connects to the Mod Bus anyway. Any help would be great. Thanks! |
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nathanscribe
Silver Member
United Kingdom
376 Posts |
Posted - 10/09/2009 : 01:06:56
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The Mod Bus jack allows you to interconnect various Microracks together so they share sweep rates - and there's a switch on the back (of some, maybe not all, I can't say without checking) that allows the polarity of the LFO to be reversed. So for example, you could connect 2 RDDs together via the Mod Bus and process a stereo signal; two RPH phasers, with inverse polarity, for a panning phase; or sweep a Delay rate in sync with a chorus, etc.
I'd have to check the service notes to see precisely where the signal comes from & goes to, but that's the basic idea. |
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p_wats
Copper Member
Canada
11 Posts |
Posted - 10/09/2009 : 07:21:40
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Thanks Nathanscribe! So I take that to mean that unless I'm going to connect multiple units that the jack won't be any use to me?
The completist in me still wants to have a jack in place though. Any ideas on how I might wire it given the two jack options I've pictured? |
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Topic |
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Boss RDD-20 Pot Values
