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Sony Discman D-T2

Discussion in 'Electronic Repair' started by J.B. Wood, Aug 7, 2013.

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  1. J.B. Wood

    J.B. Wood Guest

    Hello, all. Don't really have a repair issue but could use some
    clarification from anyone familiar with the ca. 1989 subject device.
    (The D-T2 is the model D2 with the addition of an AM/FM tuner.)

    The unit uses 4 AA batt but can be powered externally. The DC input
    jack on the back of the player is labeled for 9 VDC and the user manual
    confirms this is the voltage that an external source should supply. The
    AC adapter that was supplied with the player is a Sony AC-9W which
    supplies 6 VDC vice 9 VDC. The Discman works OK with the 6V adapter but
    the service manual for the model D2 (found a copy online) cites the
    correct AC adapter as model AC-940, which is rated at 9 VDC output.
    Thanks for your time and comment. Sincerely,
  2. Mike S.

    Mike S. Guest

    If the AC-9W provides regulated 6V (probably does) you should be safe.

    The DC input probably uses a standard (vs. low dropout) voltage regulator
    that does not kick in until the input voltage is 2.5V above the target
    (i.e. 6V + 2.5= 7.5V). Hence the nominal 9V input.
  3. Mike S.

    Mike S. Guest


    Sorry, make that 8.5V. Coffee not yet in bloodstream as yet.
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