Radioshack 250 Watt Stereo PA Amplifier Left Channel not working.

[Rick79]

The protection mode isnt on, I get only the right side channel through the speaker outputs and the headphone jack. I checked the fuses and the main board inside, I dont see anything burnt or feel anything getting real hot. I did noticed this one Diode D127 next to the speaker relay switch, it reads .179 across both ways. Could another component cause this reading or is it just a bad diode? Could this be the reason and maybe the only reason the Left Channel is out?

Ive checked all other diodes in the area and all resistors besides R194, i posted a photo of it too, it looks like it has 5 bands but im not sure.

 

[bikemech]

Hello,
Have you got a schematic for it?
I think that would be the best place to start,
Pete.

 

[Rick79]

No. I wish i did lol. Im taking it apart right now to see under the board.

 

[bikemech]

Does it have model numbers or annthing printed on the main board?

 

[Rick79]

No. Just.Radioshack 250 watt stereo PA Amplifier on the face and back.

 

[Rick79]

I pulled the diode out and it tested good. So i started inspecting the board and i found that the coil for the left channel was loose. I soldered the loose lead and that fixed it.

Yessssss!

 

[davenn]

well done

 

[kbanger]

My left channel is not working. Any advice??

 

[Harald Kapp]

You realize this is an old thread from 2015?

Any advice??

See the previous posts.