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how to repair sony str k850 won't memorize radio stations no more

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    how to repair sony str k850 won't memorize radio stations no more

    Hi guys, i have an old Sony receiver str k850 that won't memorize preset radio stations no more, i have to manually put in frequency in order to tune in station ,but if i try to set up another frequency it looses the first one and so on, this might be old caps, what you guys experts on radios think i should look for, thanks
    Last edited by ivtec; 11-08-2021, 11:13 AM.

    #2
    Re: how to repair sony str k850 won't memorize radio stations no more

    open it - see whats inside.
    it probably has a (leaked) battery or capacitor to maintain the memory

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      #3
      Re: how to repair sony str k850 won't memorize radio stations no more

      Originally posted by stj View Post
      open it - see whats inside.
      it probably has a (leaked) battery or capacitor to maintain the memory
      Thanks stj,i' try to open it and check, i'm getting to old for this though, if i had a clue where to go in the circuit would be best.

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        #4
        Re: how to repair sony str k850 won't memorize radio stations no more

        I looked at the service manual and could not see any memory backup (ie large cap) I suspect the data is stored in eeprom, make sure you are saving the station according to the manual, or you could also try a reset to clear any data that is already stored (procedure is in the owners manual)

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          #5
          Re: how to repair sony str k850 won't memorize radio stations no more

          Originally posted by R_J View Post
          I looked at the service manual and could not see any memory backup (ie large cap) I suspect the data is stored in eeprom, make sure you are saving the station according to the manual, or you could also try a reset to clear any data that is already stored (procedure is in the owners manual)
          I did the factory reset some time ago and it did not set the tuner to preset stations, i think i'll not tough this thing and will input station manually if needed every time i need it which is rarely ,i only tune in one station anyway,as long it doesn't affect other receiver functions it's fine, besides i have another Str DE335 older but still works fine,thanks
          Last edited by ivtec; 11-08-2021, 02:35 PM.

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            #6
            Re: how to repair sony str k850 won't memorize radio stations no more

            link the service manual

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