Results 1 to 12 of 12
Like Tree1Likes
  • 1 Post By lowell

Thread: BOSS DD-3(b) schematics

  1. #1
    Junior Member
    Join Date
    Oct 2009
    Posts
    2

    BOSS DD-3(b) schematics

    I am looking for DD-3b schematics, this would be the board with the surface mount parts. 3rd generation of the DD-3.
    (Yeah sucks)
    Does ANYONE have the schematics?
    I get the 'check light" and "direct out" sound, no sound routed through the delay at the output.
    Hoping the schems will help me trace to the problem, and that it is NOT that BOSS chip.

    -Thanks!

  2. #2
    Senior Member
    Join Date
    Jul 2009
    Location
    Phoenix, AZ
    Posts
    483
    I'll go ahead and post both DD-3 service manuals that I've been able to aquire. I posted the DD-2/DD-3 service manual already here:

    Boss DD-3 dead

    The DD-3a service manual with schematic and DD-3t service manual with schematic are attached. I don't know how the DD-3b differs.
    Attached Files Attached Files
    ST in Phoenix

  3. #3
    Junior Member
    Join Date
    Oct 2009
    Posts
    2
    DD-3t schemes seem to be right. The board layout looks the same.

    I bought surface mount equipment last sporing, and wil use it for the first time soon. (that specific equipment
    Thanks much!

  4. #4
    Senior Member jbltwin1's Avatar
    Join Date
    Nov 2008
    Posts
    245

    DD3

    Thanks guys. The DD3a and T stuff should help. I looked around i here for it but as usual, I couldn't find it. I get rather impatient when cyber looking. Mike.

  5. #5
    Member
    Join Date
    Dec 2008
    Posts
    31
    I also have an inop DD-3 and an in op CE-3. Can you add the service notes for the CE-3?
    Thanks
    Dave

  6. #6
    Old Timer oc disorder's Avatar
    Join Date
    Jul 2006
    Location
    Land Down Under
    Posts
    1,268
    Here you go from "downstairs O.C.!"
    Attached Files Attached Files

  7. #7
    Junior Member
    Join Date
    Jan 2011
    Posts
    1

    DD-3 No Delays/Repeats

    Does anyone know what's going on? I have an old Japanese-made Boss Digital Delay DD-3 and recently it stopped making delayed notes. No section of the pedals seems to be functioning. However, when the pedal is turned on the signal goes through it and the LED is lit. When the pedak is off, it is just bypassed.

    I have tried both battery and power supply, but I don't get any delay or reverb. Does anyone know what is going on. Perhaps it is a dry joint.

    Please help.

    SB

  8. #8
    Junior Member
    Join Date
    Aug 2011
    Posts
    1

    Unhappy DD3 problem

    I have Boss dd3 2b, and I'm having a problem with it. It produces delayed distorted sound. All knobs and parameters are functioning, but the delay sound it produces is distorted. when i use a generic adaptor, it produces heavy buzzing. I tried using a battery, yet still produces dirty sounding delay, but, without the buzzing anymore. I dont know if it is a power supply issue. Could someone help me analyze this? Thanks in advance

    BTW here is the pic of a boss dd3 2b Boss DD-3 history

  9. #9
    Old Timer
    Join Date
    Jun 2007
    Location
    Pensacola, FL
    Posts
    3,492
    Thanks to all for this thread. I just had a Taiwan DD3 in with power, but no sound bypassed or with effect. Vbias was 700mv. Removed IC1 and Vbias came up to 4.5v. Replaced IC1 w/ a SMD 5532 I had in stock and boom, fixed.
    Jazz P Bass likes this.

  10. #10
    Junior Member
    Join Date
    Apr 2018
    Posts
    2
    Quote Originally Posted by Phostenix View Post
    I'll go ahead and post both DD-3 service manuals that I've been able to aquire. I posted the DD-2/DD-3 service manual already here:

    Boss DD-3 dead

    The DD-3a service manual with schematic and DD-3t service manual with schematic are attached. I don't know how the DD-3b differs.
    I have a DD-3a that when the mode selector is on 3 (800ms) it won't come on. step on it and the light comes on, take foot off, it shuts off. all other modes are fine. looking at the service notes I see that for the mode switch on 3 it doesn't show to be going anywhere.

    any ideas?

  11. #11
    g1
    g1 is online now
    don't forget the joker g1's Avatar
    Join Date
    Feb 2010
    Location
    Canada, somewhere north of Fargo
    Posts
    9,764
    And if you turn the switch to the right, there is still another position for the "hold" setting? Or is the knob just mounted wrong?
    Certified Dotard

  12. #12
    Junior Member
    Join Date
    Apr 2018
    Posts
    2
    Quote Originally Posted by g1 View Post
    And if you turn the switch to the right, there is still another position for the "hold" setting? Or is the knob just mounted wrong?
    nah, not that stunned...lol hold works fine

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Boss DD-3 Delay
    By MSIrepair in forum Guitar Effects
    Replies: 3
    Last Post: 02-21-2013, 12:06 AM
  2. Boss DD-3 dead
    By mageerc in forum Guitar Effects
    Replies: 4
    Last Post: 10-02-2009, 08:10 PM
  3. Boss DD-3 problem
    By blipler in forum Guitar Effects
    Replies: 3
    Last Post: 02-16-2009, 01:35 PM
  4. Boss DD-3 repair
    By MSIrepair in forum Maintenance, Troubleshooting & Repair
    Replies: 0
    Last Post: 03-24-2008, 02:54 PM
  5. Boss DD-3 Repair Help
    By rhaigh in forum Guitar Effects
    Replies: 2
    Last Post: 06-16-2007, 10:47 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
  •