Slow running Panasonic RX-7700 [Solved]

Discussion in 'Tech talk' started by Rudy Rodriguez, Aug 14, 2022.

  1. Rudy Rodriguez

    Rudy Rodriguez Member

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    My favorite boombox is running slow! A 3KHz cassette tape sounds like 1KHz. I replaced the belt, and although the current belt was stretched, there was no noticeable difference with a new one. The service manual states that there is no speed control for the cassette. I don't know where to go from here.

    BTW, this boombox is a delight to work with. All the socket terminals are well labeled so removing the cassette housing was much easier than I expected.

    Anyway, I'm hoping for an undocumented POT somewhere on this unit for controlling the tape speed. Any help is greatly appreciated.
     
  2. stuck-in-time

    stuck-in-time Well-Known Member

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    How about on the motor itself? Many motors have a small covered hole on the back for an internal speed adjustment pot.
     
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  3. Rudy Rodriguez

    Rudy Rodriguez Member

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    I assumed the Service Manual would had pointed this out, but I guess not. There is what looks like an adjustment POT behind the motor so I’ll give that a go first. Thanks.
     

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