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Stk412-150 Sony Amplifier

Discussion in 'Troubleshooting and Repair' started by Midhunhere, Jun 28, 2017.

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  1. Midhunhere

    Midhunhere

    11
    0
    Jun 28, 2017
    dear friends,
    pls help me to figure out the problem.
    l have a sony amplifier board (1-676-807-21), with STK412-150 IC and its transformer. Actually the board is taken out from a sony hi-fi system model no.HCD-VX77. so I want use this as a amplifier separately .Please help me ,wiring and all.....any alteration to do if.......
    [email removed]

    thank you....
     

    Attached Files:

    Last edited by a moderator: Jun 28, 2017
  2. ramussons

    ramussons

    428
    85
    Jun 10, 2014
    Do you have the schematic of the Sony system?
     
  3. Midhunhere

    Midhunhere

    11
    0
    Jun 28, 2017
    ys..I have....
     
  4. Midhunhere

    Midhunhere

    11
    0
    Jun 28, 2017
     

    Attached Files:

  5. Midhunhere

    Midhunhere

    11
    0
    Jun 28, 2017
     

    Attached Files:

  6. ramussons

    ramussons

    428
    85
    Jun 10, 2014
    From the schematics, it seems that no alteration needs to be done in the Power Amp Board.

    Connector B is the Signal Input with a MUTE control (Gnd for MUTE, 5.0 V (?) for Un MUTE).

    Connector C is the Speaker Out.

    Connector L is the Power Supply - There are 2 AC voltage inputs. You will need to measure these.

    Check the Jumper ( looks like) JV940. If it is open, then it looks like that's all there is to be done.:)

    If JV940 is connected, then
    Page 47 has some details about Connector M and
    Page 37 for Connector C which need to be followed up.
     
  7. Midhunhere

    Midhunhere

    11
    0
    Jun 28, 2017
    thank you very much for your kind information ...thank you,thank you,,,,,
    I will check as you said sir,..
     
  8. Midhunhere

    Midhunhere

    11
    0
    Jun 28, 2017
    .....
    Conversion HCD-VX77 to my own design.... IMG-20180330-WA0005.jpg
     

    Attached Files:

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