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runblip
Copper Member
1 Posts |
 Posted - 09/01/2008 : 16:02:28
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My beloved DD 20 has seen better days. It will not work at all when using an adapter, the power light faintly flickers.
When using batteries it will pass signal, however the display acts funny. The delay that comes out of it is strange and does not accurately recreate the sound in any way.
Any thoughts? I am handy with a soldering iron, so if anyone knows about these ICs or any info on fixing a DD 20 that would be great.
Thanks |
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zerksies
Double Platinum Member
USA
3406 Posts |
Posted - 09/01/2008 : 16:25:13
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| remember boss has a 5 year warrinty |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 09/02/2008 : 16:07:42
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Hi runblip
Welcome to the forum from Australia
While zerksies has a point, with the 5 year Warranty.
Check the solder joints on the DC input socket.
Because of mechanical stressing,
The solder joints sometimes break, it's common on floor pedals & multi-effects.
See if the DC socket is loose on the PCB.
Clean off (desolder) the old solder, & reapply fresh solder.
Be warned though, the DD-20 may already be a LEAD-FREE PCB .
That would be another reason for mech. failure, most Lead-free solders aren't as mechanically robust.
Do you remember, if anything else happened to the DD-20, before it became faulty.
Please post some pics, we don't have any internal pics of the DD-20, in the Pedal Internals thread.
Keep us informed of your progress & Good Luck
Regards Dr. Bob |
Edited by - Dr. Bob on 09/02/2008 16:08:55 |
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starr36
Platinum Member
Canada
1172 Posts |
Posted - 09/04/2008 : 00:01:50
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quote:
Originally posted by Dr. Bob
Hi runblip
Welcome to the forum from Australia
While zerksies has a point, with the 5 year Warranty.
Check the solder joints on the DC input socket.
Because of mechanical stressing,
The solder joints sometimes break, it's common on floor pedals & multi-effects.
See if the DC socket is loose on the PCB.
Clean off (desolder) the old solder, & reapply fresh solder.
Be warned though, the DD-20 may already be a LEAD-FREE PCB.
That would be another reason for mech. failure, most Lead-free solders aren't as mechanically robust.
Do you remember, if anything else happened to the DD-20, before it became faulty.
Please post some pics, we don't have any internal pics of the DD-20, in the Pedal Internals thread.
Keep us informed of your progress & Good Luck
Regards Dr. Bob
DR. BOB is dang near a god on this stuff.
I cannot stress enough, don't over look the obvious... discolored components, barely connected wires. Use a big magnifying glass and good lighting to inspect solder joints; if you think you got a shot at warranty, I personally wouldn't fool around with a soldering iron except to fix the obvious.
I like the idea of the 5 year warranty though; thinking of some of these very difficult to diagnose DD-2 repairs (while an impressive intellecutual and debugging excercise its not very time-cost effective) ... you really want to trade off time spent on a "5 minute re-solder job" vs "a trip to the music store to see if they will process the warranty return on your behalf", so to me warranty = chance to get a brand new unit, I would opt for the warranty.
I hear all those old sales receipts breathing a sigh at the landfill.
ANSWERING BOB'S Question about "what happened just before" may provide clues. Was there a lightning storm or other power problems, was the wrong power supply accidentally plugged into it, was there static electricity etc etc... |
Edited by - starr36 on 09/04/2008 00:05:11 |
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DD-20 Problems
