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 Boss DD-3 problem
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cbellanga
Copper Member

United Kingdom
5 Posts

Posted - 05/21/2009 :  21:50:59  Show Profile  Click to see cbellanga's MSN Messenger address  Reply with Quote
Was given a faulty Boss DD-3.

It has a loud crackle that repeats at the selected delay rate, independent of guitar signal, volume, etc. It's not a guitar lead related issue. Happens whether on (new) battery power or wall wart.

Doesn't affect bypassed signal.

The crackle is like a distorted blip, as soon as the pedal is turned on with the footswitch it starts the blip. Can adjust the rate of the blip with the D.Time knob, Feedback works and Level works, can hear guitar under the blip.

Any ideas what's going on?

Thanks in advance.

cbellanga
Copper Member

United Kingdom
5 Posts

Posted - 05/21/2009 :  21:52:40  Show Profile  Click to see cbellanga's MSN Messenger address  Reply with Quote
By the way ... it's the DD-3 ver 2b as described here. http://www.stinkfoot.se/andreas/diy/articles/DD3.htm
Taiwanese with square BOSS chip on the back of the board.

Thank you
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cctsim
Silver Member

United Kingdom
418 Posts

Posted - 05/21/2009 :  22:17:18  Show Profile  Reply with Quote
Was the pedal modified anyhow or is it in its original state ?

If it has been modified, the crackle you mentioned points to cold solder points.
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cbellanga
Copper Member

United Kingdom
5 Posts

Posted - 05/21/2009 :  22:23:48  Show Profile  Click to see cbellanga's MSN Messenger address  Reply with Quote
Hi there .. yeah, I'm not an expert, but it I could see some marks on the pcb.

It's funny that the problem is happening just on the 800ms option.

Any idea how to solve this? I think if I try I'll burn the PCB =]

Cheers
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cctsim
Silver Member

United Kingdom
418 Posts

Posted - 05/22/2009 :  04:01:41  Show Profile  Reply with Quote
Could you post a photo of the mod-suspected area of the PCB ?
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Dr. Bob
Moderator

Australia
6593 Posts

Posted - 05/22/2009 :  09:35:35  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
Hi cbellanga

Welcome to the forum from Australia.

As ccsim has already mentioned.
it's probably best if you upload some closeup pictures.

Regards Dr. Bob
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cbellanga
Copper Member

United Kingdom
5 Posts

Posted - 05/22/2009 :  11:12:56  Show Profile  Click to see cbellanga's MSN Messenger address  Reply with Quote
Good stuff, I'll send some pictures tonight!

Thanks guys!
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Dr. Bob
Moderator

Australia
6593 Posts

Posted - 05/22/2009 :  15:13:57  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
quote:
Originally posted by cbellanga

Good stuff, I'll send some pictures tonight!

Thanks guys!


Hi cbellanga

When uploading
- please keep the pictures to approx 1024x768 pixels or under in size.
As most pics out of the new hi-res cameras are just too large to be displayed on the forum.

Thanks & regards Dr. Bob
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cbellanga
Copper Member

United Kingdom
5 Posts

Posted - 05/27/2009 :  14:33:16  Show Profile  Click to see cbellanga's MSN Messenger address  Reply with Quote
Hi guys,

Sorry not getting back in touch. I decided to sell this one and buy a japanese DD3, the first model ;)

Thanks for the help!
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Laurie
Double Platinum Member

Canada
4854 Posts

Posted - 05/27/2009 :  14:53:09  Show Profile  Visit Laurie's Homepage  Reply with Quote
quote:
Originally posted by cbellanga

Hi guys,

Sorry not getting back in touch. I decided to sell this one and buy a japanese DD3, the first model ;)

Thanks for the help!


No worries! A more sensible option IMHO
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