Results 1 to 3 of 3

Thread: Soundcraft DCP 100 PSU schematic

  1. #1
    New Member
    Join Date
    Aug 2013
    Posts
    5
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    0

    Soundcraft DCP 100 PSU schematic

    Hello,
    I have a Soundcraft DCP100 PSU which is creating a hum. R5 is burnt out and unreadable, it is connected in parallel with a cap between chassis ground and 0v. Has anyone got schematic or have a look inside one or give me an idea of a value from experience of this part of a PSU.
    Any help greatly appreciated
    thanks
    bce

    0 Not allowed! Not allowed!

  2. #2
    Supporting Member Jazz P Bass's Avatar
    Join Date
    Dec 2008
    Location
    Wernersville, PA
    Posts
    12,940
    Thumbs Up/Down
    Received: 534/3
    Given: 289/0
    Rep Power
    26
    It may be a 100 ohm resistor between circuit ground and chassis ground.

    That resistor being open should not 'create' a hum.

    Check each supply voltage for excess Vac ripple.

    If they are steady then the PSU is more than likely not the problem.

    (Sounds like you had a ground loop issue that took out the resistor)

    0 Not allowed! Not allowed!

  3. #3
    New Member
    Join Date
    Aug 2013
    Posts
    5
    Thumbs Up/Down
    Received: 0/0
    Given: 0/0
    Rep Power
    0
    Thanks,
    because of its age I have already replaced all electrolytics in the psu with new ones, it ran quiet for a few hours, then when hum started I noticed R5 burnt out. I rechecked board for shorts etc and all is ok. I ran the desk with a known good PSU (not a DCP100) and all was quiet. The only bands on R5 that I can see are a red at one end and gold at the other, then all is burnt black in the middle.

    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. Need schematic soundcraft spirit powerstation1200
    By Rajan Paliwale in forum Schematic Requests
    Replies: 0
    Last Post: 07-30-2019, 07:45 PM
  2. Folio Notepad schematic (soundcraft)
    By robmietto in forum Schematic Requests
    Replies: 7
    Last Post: 04-04-2017, 04:47 PM
  3. Soundcraft EFX8 schematic
    By MarkusBass in forum Schematic Requests
    Replies: 26
    Last Post: 04-26-2015, 02:59 AM
  4. SoundCraft spirit Folio 4 schematic
    By diydidi in forum Schematic Requests
    Replies: 0
    Last Post: 02-03-2015, 10:52 AM
  5. Soundcraft Spirit fx 16 schematic
    By kaweka in forum Schematic Requests
    Replies: 0
    Last Post: 04-24-2013, 02:06 PM

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
  •