Sony FH-15R - Recent purchase..

Discussion in 'Tech talk' started by Ken80s, Apr 25, 2021.

  1. Ken80s

    Ken80s Well-Known Member

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    It's so rare to appear online for sale in my country and as a matter of fact I bet my money on this unit. The seller told me upfront as the unit is non functional! I actually take it slow and only work on it during weekends...

     
    Last edited: Apr 27, 2021
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  2. Ken80s

    Ken80s Well-Known Member

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    Upon diagnostic , found many parts start failing one after another. IC chips and power supply components among some of the parts being replaced during troubleshooting.

    The schematic diagram which I downloaded online helps me a lot in tracing the problems..

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    Replace the dual input op-amp also. IC is cooked resulting the left side output is garbled and low sound.
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    Touching up the speaker too..
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    Last edited: Apr 30, 2021
  3. Ken80s

    Ken80s Well-Known Member

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    After restoring the amplifier section, next is to look into the tuner. Lucky though there is not much problem except replacing the lithium battery for radio station memory retention.
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    Replacement of push button switches with high contact resistance..
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    Last edited: May 12, 2021
  4. Ken80s

    Ken80s Well-Known Member

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    At least now I can render this unit with aux input and radio. Shall work on the cassette deck soon and I believe this could be the biggest challenge..



     
    Last edited: Apr 25, 2021
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  5. Ken80s

    Ken80s Well-Known Member

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  6. Valentin

    Valentin Well-Known Member

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    Very nice unit ! It's rare to see Dolby on these, especially Dolby C. It is the first one I see with this feature. Enjoy your purchase, @Ken80s !
     
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  7. Boodokhan

    Boodokhan Well-Known Member

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  8. thairacer

    thairacer New Member

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    Hi @Ken80s , superb work on this beautiful Beast :) , I have the FH150R and I love it !! bought second hand 4 years ago from a collector who revive him from dead ! he changed the speakers, not very flat now but it's a more commun design but less expensive and sound still so loud ! he made a complete revision I think :) and gave me a second cassette deck (that's useful cause now the tape start and stop after 4 seconds... ) and my principal issue is the sound who comes only after a certain level. I saw that you solve this sort of problem for connectors, did I have to change it ? `. I found any information on the net apart you ;) IMG_6312.jpg
     
    Last edited: Mar 17, 2023
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