Pioneer RX-3700 - One channel not working

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  • caphair
    Badcaps Legend
    • Nov 2011
    • 1249
    #1

    Pioneer RX-3700 - One channel not working

    Hi guys a friend asked me to look at this receiver for him. He claims that the balance control doesn't work/only one side has sound.

    I have like no experience dealing with receivers and they intimidate me a bit due to lack of knowledge on how preamps/amps work. Just very basic idea but never got involved.

    I'm curious if anyone has ever fixed this particular model or came across a similar issue. I'll post pics when I get the receiver later today. For now I came across this for specs: https://www.waste.org/~msg/ebay/sx-3700/sx-3700.html

    Also, I don't have any speakers to hook up except for ones pulled from a tv that are rated 10w 8ohms. Could I use them at a low volume just for testing? The receiver is rated 45w 8ohms per channel
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 31020
      • Albion
      #2
      Re: Pioneer RX-3700 - One channel not working

      does it have a headphone socket?

        Comment

        • caphair
          Badcaps Legend
          • Nov 2011
          • 1249
          #3
          Re: Pioneer RX-3700 - One channel not working

          It does. Use that for testing?

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 31020
              • Albion
              #4
              Re: Pioneer RX-3700 - One channel not working

              yes.

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA
                  #5
                  Re: Pioneer RX-3700 - One channel not working

                  Did you already try activating TAPE MONITOR switches and other switches bunch of times to clean the contacts?
                  Attached Files
                  Last edited by budm; 03-10-2016, 11:06 AM.
                  Never stop learning
                  Basic LCD TV and Monitor troubleshooting guides.
                  http://www.badcaps.net/forum/showthr...956#post305956

                  Voltage Regulator (LDO) testing:
                  http://www.badcaps.net/forum/showthr...999#post300999

                  Inverter testing using old CFL:
                  http://www.badcaps.net/forum/showthr...er+testing+cfl

                  Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                  http://s807.photobucket.com/user/budm/library/

                  TV Factory reset codes listing:
                  http://www.badcaps.net/forum/showthread.php?t=24809

                    Comment

                    • caphair
                      Badcaps Legend
                      • Nov 2011
                      • 1249
                      #6
                      Re: Pioneer RX-3700 - One channel not working

                      Originally posted by budm
                      Did you already try activating TAPE MONITOR switches and other switches bunch of times to clean the contacts?
                      That's the first thing I intend on doing. I picked up some electrical cleaner and plan to try that first. I will keep you posted. Thanks for that pdf!

                        Comment

                        • mmartell
                          Badcaps Legend
                          • Oct 2013
                          • 3189
                          • Canada
                          #7
                          Re: Pioneer RX-3700 - One channel not working

                          I think your being asked to try the headphone jack to isolate the problem in the amp or preamp stage.

                            Comment

                            • stj
                              Great Sage 齊天大聖
                              • Dec 2009
                              • 31020
                              • Albion
                              #8
                              Re: Pioneer RX-3700 - One channel not working

                              no, just something to get some output without trashing speakers.

                              next is to try all inputs to see if the problem is total or only effecting some.
                              also, do you get hum on both channels?

                                Comment

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