Left channel not working with my speakers on my Technics SA-303 receiver

ccevans6 · 8th February 2010, 08:13 PM

I just purchased a vintage Technics SA-303 receiver. When I hooked up the speakers, I am only able to get the right channel. I turn the balance control to the left and hear only a faint sound. With the speakers hooked up I only get the right LED's, however, when I disconnect the left speaker and try it, I get both LED's. This happens in remote mode as well. I then tried the headphones and everything works perfectly. Any thoughts? Why would hooking up a speaker affect the LED's?

RJM1 · 9th February 2010, 04:10 AM

Open emitter resistors or output transistors. It sounds like it is just running off the driver transistors, but a schematic would be helpful.

ccevans6 · 11th February 2010, 06:11 PM

RJM1, thank you for your reply. I have a schematic that I just purchased for this receiver. What should I be looking for?

8th February 2010, 08:13 PM	#1
ccevans6 diyAudio Member Join Date: Feb 2010 Location: Ohio	Left channel not working with my speakers on my Technics SA-303 receiver I just purchased a vintage Technics SA-303 receiver. When I hooked up the speakers, I am only able to get the right channel. I turn the balance control to the left and hear only a faint sound. With the speakers hooked up I only get the right LED's, however, when I disconnect the left speaker and try it, I get both LED's. This happens in remote mode as well. I then tried the headphones and everything works perfectly. Any thoughts? Why would hooking up a speaker affect the LED's?

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9th February 2010, 04:10 AM	#2
RJM1 diyAudio Member Join Date: Jan 2010 Location: Titusville, Fl.	Open emitter resistors or output transistors. It sounds like it is just running off the driver transistors, but a schematic would be helpful.

11th February 2010, 06:11 PM	#3
ccevans6 diyAudio Member Join Date: Feb 2010 Location: Ohio	RJM1, thank you for your reply. I have a schematic that I just purchased for this receiver. What should I be looking for?

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