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pureanalog
Copper Member
12 Posts |
 Posted - 11/19/2009 : 22:13:19
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I have a Boss DD-3 delay pedal (purple sticker made in taiwan) that acts like this:
The hold mode works properly.
On the normal delay modes I hit a note, and it starts repeating (not good sounding repeats), infinately and it all turns out into a loud muddy feedback that cannot be stopped and all builds up.
Well, what could that be? Any guesses? Any more info you would like to have. |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 11/19/2009 : 23:32:32
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I've had a DD-3 long-chip that had exactly that symptom... It was the control capacitors in the compander.
Let me know what version it is (http://www.stinkfoot.se/andreas/diy/articles/DD3.htm) and I'll try to help you with the parts to try swapping.....
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pureanalog
Copper Member
12 Posts |
Posted - 11/20/2009 : 00:00:07
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it is a purple label made in taiwan model.
so that would make it a non- long chip version right??
I will open it up tommorow. |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 11/20/2009 : 00:35:27
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| Yeah, but I'm hoping it is a V2... |
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pureanalog
Copper Member
12 Posts |
Posted - 11/21/2009 : 15:26:41
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[URL=http://img136.imageshack.us/i/r0011685.jpg/] [/URL]
this is the pedal...
so any ideas where to start?
thanks |
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pureanalog
Copper Member
12 Posts |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 11/21/2009 : 16:38:49
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Well... the EXCELLENT news is that someone, sometime has put an incorrect baseplate on it. What you have is a V1, or "long chip" - Made In Japan (MIJ). The holy grail of DD-3's.
I had one of these with the same symptoms. The problem is very possibly caused by C34 failing. Try replacing that first, then we'll go from there.
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pureanalog
Copper Member
12 Posts |
Posted - 11/21/2009 : 17:09:15
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hmm... how can you tell that it is made in japan?
weren't there any non-japan longchip versions made?
I also have a blue made in japan DD-3 that I normally use. I will open it up and check out what the version the DD-3 is.. |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 11/21/2009 : 17:20:13
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quote:
Originally posted by pureanalog
hmm... how can you tell that it is made in japan?
weren't there any non-japan longchip versions made?
I also have a blue made in japan DD-3 that I normally use. I will open it up and check out what the version the DD-3 is..
From the product reference part of BossArea: "all DD-3s made in Taiwan are DD-3A or DD-3B versions". So definitively, a long chip must be MIJ. |
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pureanalog
Copper Member
12 Posts |
Posted - 11/21/2009 : 17:40:20
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I bought this off ebay as a package deal.
A blue label MIJ DD-3 (that works and is my main delay pedal) and this one depicted here.
Could it be that the seller swapped the baseplates to sell the MIT pedal as a MIJ? I hope not but I will open up my blue label MIJ DD-3 to be sure...
Otherwise it is pretty strange... |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 11/21/2009 : 17:43:22
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I'm not sure where the plate might have come from. Possibly it is an honest mistake - took both the plates off one day and got them wrong when putting them back on.
Let's see a pic of the other one and we'll know. If you got a long-chip for a MIT price you are way ahead in the deal. |
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pureanalog
Copper Member
12 Posts |
Posted - 11/22/2009 : 11:46:01
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He wanted 80 euros for both those pedals (back when the dollar was 1.5 euro). So like $60 approx for both.
I really didnt know that they were worth that much, but nowdays the seem to be fetching pretty high prices on ebay.
I also have a CE-2 made in Taiwan which sounds terrific, so I didnt really look into japan CE-2s. What do you know about those? 
I will go to the electronics store and buy the C34. Could you give me a hint on its value and more importantly where it is located? I cannot find it on the PCB. It must be somewhere very cramped... |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 11/22/2009 : 14:40:12
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quote:
Originally posted by pureanalog
He wanted 80 euros for both those pedals (back when the dollar was 1.5 euro). So like $60 approx for both.
I really didnt know that they were worth that much, but nowdays the seem to be fetching pretty high prices on ebay.
I also have a CE-2 made in Taiwan which sounds terrific, so I didnt really look into japan CE-2s. What do you know about those?
I will go to the electronics store and buy the C34. Could you give me a hint on its value and more importantly where it is located? I cannot find it on the PCB. It must be somewhere very cramped...
Here is a thread about the CE-2 MIT/MIJ discussion.
http://www.bossarea.com/forum/topic.asp?TOPIC_ID=8336
C34 is a 10uF 16V electrolytic capacitor. Located near pin 1 of IC4 (the 4066). |
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pureanalog
Copper Member
12 Posts |
Posted - 12/02/2009 : 11:01:19
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so today I opened up the MIJ pedal and found out it is a 2b version...
The one shown in the photos has the purple MIT label but you tell me its japanese...
The 2b version (that I have been using) has a blue MIJ label..
What could have happened here?
How do these two compare tonewise?
I didnt yet get the chance to purchase the capacitor for the other one. Do you have any other possible failures that could cause the problem because getting hold of parts is not very easy here, so perhaps I could buy all potential trouble-making parts. |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 12/02/2009 : 17:22:16
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Hi pureanalog!
Without doing a little more investigation, it is not possible to guess what else you might need. Maybe buy a few of the capacitors (10uF 16V or 25V). Maybe also buy some 11V 1W zener diodes in case D6 is fried.
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pureanalog
Copper Member
12 Posts |
Posted - 12/04/2009 : 11:41:11
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| unfortunately the problem remained the same even with a new cap... perhaps i did crappy job too... anyhow since you have been so helpful and since this is supposed to be a great pedal, let me give it to you for free in case you can repair it yourself and keep it in your arsenal. |
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Topic |
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Boss DD-3 Semi-working, (only on hold function)
