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What is wrong with my vintage pioneer?

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    What is wrong with my vintage pioneer?

    Well, i recently found a full 80's pioneer silver face hi-fi laying around. It all works apart from the amplifier. One of these:



    A pioneer sa-740. This amplifier is one of those amps that had electronic input selection swiches unlike other amps that had those with the ''mechanical'' touch like my nad 3020.



    Well, it's problem comes from here and, because this electronic system is more complex than the old school mechanical, i am really clueless on where is the godammned problem.


    You turn it on, tape light comes on



    But it's like the tape button was stuck, so when you select another input source



    Unless you hold the input source button on, it will always return to tape mode



    And there will be no sound what so ever. I think if you held the button long enough it would stay working but not for long.

    Can anyone help me?
    Originally posted by kendogg
    Don't know, but the E90 wasn't designed from the ground-up intending to be a racecar like the E30 was.
    OG RACECAR

    #2
    Take it to a repair place, or buy a new one?
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      #3
      I want to mend it myself, and these are becoming pretty rare now
      Originally posted by kendogg
      Don't know, but the E90 wasn't designed from the ground-up intending to be a racecar like the E30 was.
      OG RACECAR

      Comment


        #4
        what does the inside of those switches look like? you need to get a multimeter in there and see whats happening

        [/URL]

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          #5
          thats a tight deck lol hope you get it fixed

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            #6
            Originally posted by haledj View Post
            what does the inside of those switches look like? you need to get a multimeter in there and see whats happening
            I took off the faceplate and each swich has alot of connections. It is essencially a circuit board.
            Originally posted by kendogg
            Don't know, but the E90 wasn't designed from the ground-up intending to be a racecar like the E30 was.
            OG RACECAR

            Comment


              #7
              Originally posted by jeffw View Post
              thats a tight deck lol hope you get it fixed
              Yeah it is a nice amplifier, this is what i scored with it,




              :firehop:
              Originally posted by kendogg
              Don't know, but the E90 wasn't designed from the ground-up intending to be a racecar like the E30 was.
              OG RACECAR

              Comment


                #8
                Bump
                Originally posted by kendogg
                Don't know, but the E90 wasn't designed from the ground-up intending to be a racecar like the E30 was.
                OG RACECAR

                Comment


                  #9
                  are 80's electronics really vintage? So what are all my 60's sansui amplifiers then? Hope you get this fixed.

                  Comment


                    #10
                    Originally posted by Dozyproductions View Post
                    are 80's electronics really vintage? So what are all my 60's sansui amplifiers then? Hope you get this fixed.
                    ancient.
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                      #11
                      I would try and find a more specialized forum on this topic. ;) Not that r3v isn't filled with 80's stereo gurus. . .
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                        #12
                        nads
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                          #13
                          It has died of dysentery.
                          Matt

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                            #14


                            Sign up and post over there. These guys should be able to help you.
                            Can you read electrical schematics at all?
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                              #15
                              Originally posted by Dozyproductions View Post
                              are 80's electronics really vintage? So what are all my 60's sansui amplifiers then? Hope you get this fixed.
                              Well not really vinatge, but still better than the new ones

                              Originally posted by unrlmth View Post
                              I would try and find a more specialized forum on this topic. ;) Not that r3v isn't filled with 80's stereo gurus. . .
                              I was praying that stereoinstaler1 would see this.


                              Originally posted by blunt View Post
                              nads
                              I have one, a pretty good one


                              Originally posted by BlackSpeed66 View Post
                              www.audiokarma.org

                              Sign up and post over there. These guys should be able to help you.
                              Can you read electrical schematics at all?

                              That's what ill do, i can read schematics.

                              I have already searched for schematics but this amplifier is not very documented.
                              Originally posted by kendogg
                              Don't know, but the E90 wasn't designed from the ground-up intending to be a racecar like the E30 was.
                              OG RACECAR

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