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nothing
Copper Member
United Kingdom
4 Posts |
 Posted - 01/16/2007 : 18:35:43
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hey, im new here, although i have been lurking about for some time. anyhow, i was given an old OS-2 (serial number: EC90280) a few days ago that had been found in a garage. its not in too bad condition, usual bits of rust, paint flecks, dirt but thats not really bothering me much..
its more the fact that it won't work off an adapter, but with a battery it will. also it creates a lot of noise as soon as you hit the pedal (without even playing a note) any ideas?
pic of it here:
http://www.nothingatall.net/blog.php?who=rich&full=leave&item=359 |
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lost_in_sound
Silver Member
United Kingdom
150 Posts |
Posted - 01/16/2007 : 19:44:21
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hmm, it looks like a lot of dust has gotten to it, not that it'll help but brush it off  try taking he battery out before you use the adaptor, i don't think you're meant to have them both at once, but try removing it if you already haven't |
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stratman
Silver Member
Australia
283 Posts |
Posted - 01/16/2007 : 23:11:53
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Hi nothing and welcome to the forum!
You should be able to run the pedal from an AC adaptor with the battery still in there.
Sounds like there's a short or other bad connection around the DC power input jack. I could be completely wrong though 
Dr. Bob is one of the resident electronics gurus here... maybe he might have some input?
Good luck. |
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StratoSphere
Double Platinum Member
Canada
2232 Posts |
Posted - 01/16/2007 : 23:46:06
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welcome to the board, nothing.. try taking the screws off the back and look for any disconnected wires. this is probably the case. good luck
it does look pretty dirty. maybe blow some air into it.
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 01/17/2007 : 14:38:45
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quote:
Originally posted by stratman
Hi nothing and welcome to the forum!
You should be able to run the pedal from an AC adapter with the battery still in there.
Sounds like there's a short or other bad connection around the DC power input jack. I could be completely wrong though
Dr. Bob is one of the resident electronics gurus here... maybe he might have some input?
Good luck.
Hi Nothing & Stratman
First of all, are you using a genuine PSA power adapter?
Is the PSA working with your other pedals?
If you are using a 3rd party non genuine adapter, id it set for 9VDC & negative on the tip (center connection)?
If all of the above above conditions are correct, then you may have an electronic fault at the DC in socket or on the board.
It maybe as simple as a broken wire-solder joint, or ac complex as a blown or shorted reverse voltage protection diode.
Though if the diode was shorted, you will find the the 9V battery will go flat super quickly & would probably be hot to the touch.
On the newer circuit boards, the CD socket is soldered directly to the ciruit board.
In this case look for cracked solder joints, on the DC socket, where it is soldered to the board.
You may need to use a magnifying glass, if you have cracked solder joints, try to re-solder them with a fine tip low wattage, soldering iron.
I check & your unit is from August 1991 & definitely uses the PSA adapter.
Some older pedals use the ACA which is, 12V DC Unregulated, but not yours.
can you tell us, or find out any more about why or how this pedal went faulty, the more info you can give us, the more we can try to help you
Hope this helps you in some way, & Good luck. 
Regards Dr. Bob
PS - Long time no hear Stratman ... 
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os2 question
