Connect with us

Panasonic Sa-ak270 Amp(Why I am getting a Dc voltage on the output?)

Discussion in 'General Electronics Discussion' started by Tim_Tronics45, Dec 24, 2021.

Scroll to continue with content
  1. Tim_Tronics45

    Tim_Tronics45

    3
    0
    Dec 23, 2021
    I have an old Panasonic radio amp that I want to reuse. I hooked it up to the the original power supply and I shorted the pcont transistor to get the power supply to output the main voltages.

    I realised that the amp IC has a mode pin so I shorted the mode_da transistor (Q5604) to get the required voltage on the mode pin.
    When I did that I measured 29.5v dc on the amp right channel only.
    Can somebody please explain why am I getting a dc voltage on the amp output?
    Btw I am not pro in electronics I am just learning.
    Screenshot 2021-12-24 at 2.36.22 PM.png
    Screenshot 2021-12-24 at 2.29.18 PM.png
     

    Attached Files:

  2. Bluejets

    Bluejets

    5,615
    1,188
    Oct 5, 2014
    Shorting things out willy nilly is a big no-no.
    It is not how to test and can cause disasterous results.
     
  3. Tim_Tronics45

    Tim_Tronics45

    3
    0
    Dec 23, 2021
    Ok sir what do you suggest I do to get this amp working
    I already got the amp powered but I won't get any output because the mode pin 23 needs an input
     
  4. Bluejets

    Bluejets

    5,615
    1,188
    Oct 5, 2014
    No idea....probably in a part of the circuitry you haven't shown.
    Far too complex for a beginner anyhow and "shorting" more than likely caused more problems.

    That plus it's Xmas and I'm taking time off.....
     
    Tim_Tronics45 likes this.
Ask a Question
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.
Electronics Point Logo
Continue to site
Quote of the day

-