Results 1 to 4 of 4

Thread: Boss DD-3 problem

  1. #1
    New Member
    Join Date
    Feb 2009
    Posts
    3
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    0

    Boss DD-3 problem

    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.

    0 Not allowed! Not allowed!

  2. #2
    Supporting Member
    Join Date
    May 2006
    Location
    Texas
    Posts
    304
    Thumbs Up/Down
    Received: 8/0
    Given: 0/0
    Rep Power
    14
    Do you have the big chip version DD-3? If so, replace the 10uf caps inside the unit. Most likely you have a leaky 10uf cap.

    CJ

    0 Not allowed! Not allowed!

  3. #3
    New Member
    Join Date
    Feb 2009
    Posts
    3
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    0
    Thanks for your response CJ.

    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.

    Tried replacing all of the 10uf's. As I pulled them out they didn't look to be leaking, and after they were replaced with new parts it behaves the same way as before.

    Any other ideas?

    0 Not allowed! Not allowed!

  4. #4
    Supporting Member
    Join Date
    May 2006
    Location
    Texas
    Posts
    304
    Thumbs Up/Down
    Received: 8/0
    Given: 0/0
    Rep Power
    14
    Check for +5v at IC9. Check for +4.5v at C46 or pin 3 of IC1 with a +9vdc power input. If you can scope these points check for no noise.

    IC5 pin 7 is the conditioned signal into the main CPU.
    IC8 pin 7 is the filtered signal out of the CPU. (delayed signal)
    You can look for the blip before the CPU or after the CPU to isolate where the blip occurs.


    CJ

    0 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Problem with Boss OS-2 OD/Distortion pedal
    By Chuck_Farlee in forum Guitar Effects
    Replies: 5
    Last Post: 01-30-2009, 02:35 PM
  2. Boss ME-50
    By dezmoduo in forum Guitar Effects
    Replies: 1
    Last Post: 01-18-2009, 03:29 AM
  3. Boss TR2 (only a little problem for Profi's)
    By jjj in forum Guitar Effects
    Replies: 19
    Last Post: 12-29-2008, 11:40 PM
  4. boss ac3 volume problem
    By shed dweller in forum Guitar Effects
    Replies: 1
    Last Post: 05-31-2008, 02:20 PM
  5. Boss Chorus Problem
    By Pablomago in forum Guitar Effects
    Replies: 8
    Last Post: 05-19-2008, 05:50 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •