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Need to know about this part

Discussion in 'Troubleshooting and Repair' started by pharaon, Jul 18, 2016.

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  1. pharaon

    pharaon

    239
    3
    Oct 28, 2014
    What is the output of it0092b
    Because it need to be replaced
     

    Attached Files:

  2. Anon_LG

    Anon_LG

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    117
    Jun 24, 2014
    It appears to be a transformer, and this appears to be a power circuitry board. I can not find the datasheet through searching the ID characters, what product is your board from?
     
  3. pharaon

    pharaon

    239
    3
    Oct 28, 2014
    Pc speaker
     
  4. davenn

    davenn Moderator

    13,439
    1,808
    Sep 5, 2009
    the SP2822 IC is a dual channel audio amp

    the transformer is a mains stepdown transformer

    how do you know it's faulty ? how did you test it ?


    Dave
     
  5. pharaon

    pharaon

    239
    3
    Oct 28, 2014
    i test it with analog multi meter and it didn't measure for one coil
     
  6. Sunnysky

    Sunnysky

    469
    116
    Jul 15, 2016
    try a 12Vac center tap ~5 VA transformer.
     
  7. JimW

    JimW

    59
    5
    Oct 22, 2010
    I will guess that the open winding is the primary. Most likely a thermal fuse that is open. These are right at the surface of the transformer windings. It would be much easier to replace this than find a replacement transformer with the correct size and pin spacing.

    -Jim
     
  8. 73's de Edd

    73's de Edd

    2,773
    1,159
    Aug 21, 2015
    Sir pharaon . . . . .


    Can you give us a photo of the flip flop / foil side of the board.?
    The capacitance and voltage rating of the GIANT capacitor ?
    Are there are 2 or 4 diodes at the end of the board near the P1-P2 AC input terminals of the PCB?


    73's de Edd
     
    Last edited by a moderator: Jul 19, 2016
  9. Bluejets

    Bluejets

    3,690
    761
    Oct 5, 2014
    I did a Google on SP2822 and came up with the following.
    There is a circuit at the bottom showing the chip in a similar configuration with a 10v dc drive if that helps.
    So I'm guessing transformer around 7vac output.

    http://yaplog.jp/kazuikazui/archive/233

    Your board looks like it has copped a fair bit of heat.
     
  10. pharaon

    pharaon

    239
    3
    Oct 28, 2014
    here's the photo that show all
    but if there's any electronic part rather than coils because i wont be able to find such small size so i wonder if there's an ic that do that same

    the Big capacitor is 2200 uf 16 v

    [​IMG]
    [​IMG]

    [​IMG]
    [​IMG]
    [​IMG]
     
  11. Sunnysky

    Sunnysky

    469
    116
    Jul 15, 2016
    Can you remove transformer and replace with any 12Vdc supply to secondary pins? with correct polarity! with regards to caps.
     
  12. shrtrnd

    shrtrnd

    3,688
    457
    Jan 15, 2010
    If you've got the troubleshooting skills, if you find a transformer you think will work, I'd check those caps and bridge rectifier diodes before I tried to fire it up again. If your transformer burned open-circuit, it may have taken-out more
    than just the transformer. Good luck with the transformer search.
     
  13. Bluejets

    Bluejets

    3,690
    761
    Oct 5, 2014
    Did anyone read #9?
     
  14. Sunnysky

    Sunnysky

    469
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    Jul 15, 2016
    yes
     
  15. Bluejets

    Bluejets

    3,690
    761
    Oct 5, 2014
    Ok...thanks
    Circuit attached.
     

    Attached Files:

    • Amp.jpg
      Amp.jpg
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  16. pharaon

    pharaon

    239
    3
    Oct 28, 2014
    the issue is the 12 vdc that is avilable is way larger to fit in such the original one place
     
  17. pharaon

    pharaon

    239
    3
    Oct 28, 2014
    yes we did..im trying to find a replacement for that part but i have problem for the available one's size
     
  18. Sunnysky

    Sunnysky

    469
    116
    Jul 15, 2016

    My suggestion is use a wallwort and feed DC onto the board
     
    davenn and Bluejets like this.
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