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bassinyourface
Bronze Member
France
76 Posts |
 Posted - 06/06/2009 : 14:22:28
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Hi !
I was given recently a damaged SYB-3.
I think it suffered from a wrong polarity.
The led lights up but the sound comes out like a scratchy pot although pots seem OK.
My question is:
Is the input diode (D1) possibly dead ?
If anybody has any clue,feel free to share as the circuit is mostly SMC and my knowledge pretty limited 
As a first try,i will check diodes and caps,hoping I get lucky
And,by the way,does anybody know if the D1 diodes are the same value in all the Boss pedals ?
Thanks ! |
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bassinyourface
Bronze Member
France
76 Posts |
Posted - 06/09/2009 : 18:49:00
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Hi there !
Anybody knows where I can possibly find a schematic for the SYB-3 ?
Thanks !
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 06/09/2009 : 19:10:21
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Hi bassinyourface! There is no schematic for this pedal available.
If the diode was dead, the pedal would either not work at all (diode short circuit) or work with no issues (diode open circuit).
The "scratchiness" could be any number of things in this pedal - it is a quite complex beast...
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bassinyourface
Bronze Member
France
76 Posts |
Posted - 06/09/2009 : 23:04:30
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Hey Laurie !
This beast is too complex for me,I was hoping it would be simple...
You are right,it can't be the diode 'cause there is voltage at different points on the board (does this make sense ? ) and ICs seem intact as far as I can tell.
By seing the list of pedals you rescued,you are an expert in those digital pedals.
Do you by chance have any clue ? |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 06/09/2009 : 23:22:50
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I'm sorry bassinyourface. I don't have any experience with this pedal at all (I've never seen a broken one).
Without the schematic, we are flying blind I'm afraid.
The only thing that I can suggest is posting some crisp photos of the front and back of the board. Maybe we will see something... |
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FrenchBOSS
Bronze Member
France
68 Posts |
Posted - 06/10/2009 : 01:45:57
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| I have a question please, is the SYB-3 analog or digital? what about the others SYB? |
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bassinyourface
Bronze Member
France
76 Posts |
Posted - 06/10/2009 : 15:59:09
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The SYB-3 is digital,and the SYB-5 being a later model it should be too in my opinion.
J'esp�re avoir r�pondu � ta question. |
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FrenchBOSS
Bronze Member
France
68 Posts |
Posted - 06/10/2009 : 16:35:51
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quote:
Originally posted by bassinyourface
The SYB-3 is digital,and the SYB-5 being a later model it should be too in my opinion.
J'esp�re avoir r�pondu � ta question.
Oui merci
First I thought the SYB-3 was analog and the others were digital |
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diode in SYB-3
