Need help to fix old RC controller

Discussion in 'Microcontrollers and Programming' started by Ralf Kalkuhl, Dec 13, 2016.

  1. Ralf Kalkuhl

    Ralf Kalkuhl

    Joined:
    Dec 13, 2016
    Messages:
    7
    Likes Received:
    0
    I dont know anything about circuits i just need help to solder the negative wire back to the board i just dont know where to solder the wire on the board any help would be appreciated.
     

    Attached Files:

    Ralf Kalkuhl, Dec 13, 2016
    #1
    1. Advertisements

  2. Ralf Kalkuhl

    Harald Kapp Moderator Moderator

    Joined:
    Nov 17, 2011
    Messages:
    7,057
    Likes Received:
    1,160
    Location:
    Germany-Europe-Earth-Sol System-Milky Way-Laniakea
    Show us an image of the back of the pCB.
    It may also help to know which chip is under the label "Modul Nr. 40018" as knowing where the chip's ground pin is helps identifying the trace to the wire pad.
     
    Harald Kapp, Dec 13, 2016
    #2
    1. Advertisements

  3. Ralf Kalkuhl

    Bluejets

    Joined:
    Oct 5, 2014
    Messages:
    1,660
    Likes Received:
    326
    Good chance that the negative sign (-) on the electrolytic capacitor will be the negative rail.

    It's the can looking device between D3 and R8.

    Nice clear photo of the reverse side of the board would help also.
     
    Bluejets, Dec 13, 2016
    #3
    Harald Kapp likes this.
  4. Ralf Kalkuhl

    Harald Kapp Moderator Moderator

    Joined:
    Nov 17, 2011
    Messages:
    7,057
    Likes Received:
    1,160
    Location:
    Germany-Europe-Earth-Sol System-Milky Way-Laniakea
    Good hint.
     
    Harald Kapp, Dec 13, 2016
    #4
  5. Ralf Kalkuhl

    Ralf Kalkuhl

    Joined:
    Dec 13, 2016
    Messages:
    7
    Likes Received:
    0
    Here's a pic of the back and the chip
     

    Attached Files:

    Ralf Kalkuhl, Dec 13, 2016
    #5
  6. Ralf Kalkuhl

    Ralf Kalkuhl

    Joined:
    Dec 13, 2016
    Messages:
    7
    Likes Received:
    0
    thanks guys i actually got it working again the ground rail was on that can thing
     
    Ralf Kalkuhl, Dec 14, 2016
    #6
    1. Advertisements

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads
  1. Boris Mohar

    Need to fix an old Ampex to recover old sattelite data

    Boris Mohar, Apr 7, 2009, in forum: Electronic Repair
    Replies:
    1
    Views:
    526
    Boris Mohar
    Apr 9, 2009
  2. Soundsight
    Replies:
    8
    Views:
    494
    nitish kumar sinha
    Aug 16, 2016
  3. Dishan

    Help to fix power supply of a Projector.....

    Dishan, Aug 1, 2016, in forum: Electronics Repair
    Replies:
    4
    Views:
    393
    eKretz
    Aug 5, 2016
  4. alex_gomez
    Replies:
    4
    Views:
    480
    Martaine2005
    Aug 24, 2016
  5. Amitp

    Need to reduce 5V 500ma to 3V 30ma

    Amitp, Oct 16, 2016, in forum: General Electronics Chat
    Replies:
    8
    Views:
    276
    Audioguru
    Oct 17, 2016
  6. jishak
    Replies:
    4
    Views:
    339
    Harald Kapp
    Nov 1, 2016
  7. Dylan Lie

    PLEASE HELP!! LED lamp isnt working, but want to try fix it!

    Dylan Lie, Nov 17, 2016, in forum: General Electronics Chat
    Replies:
    10
    Views:
    213
    cjdelphi
    Nov 19, 2016
  8. Cyber Tech

    Help to find Sata To 4Pin power connector cable??

    Cyber Tech, Nov 23, 2016, in forum: General Electronics Chat
    Replies:
    7
    Views:
    119
    (*steve*)
    Nov 23, 2016
Loading...