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AC Adapter

Discussion in 'Electronic Repair' started by Vic, Nov 24, 2004.

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  1. Vic

    Vic Guest

    Hi
    Would appreciate some advice on the above. The adapter was part of a "Dual
    record deck" (CS455). Unfortunately the adapter cable was damaged and it no
    longer works. Does anyone know what one I could use as a replacement for the
    "Dual deck"?

    The information on the AC Adapter is:
    Input: 230V~ +-10%/50Hz/1VA
    Output: 12V-/20mA
    Type: FW3099

    Thank you
    Vic
     
  2. Graham

    Graham Guest

    --
    Graham.



    %Profound_observation%
    20 mA does not seem enough to run a disco unit. Are you sure about the
    output current.
    You need to tell us if the output is AC or DC and if DC if it is regulated
    or not.
    Describe the symbol immediately after the output rating, is it a solid line
    with a dotted line underneath?
     
  3. Vic

    Vic Guest

    Hi Graham
    Thanks for answering. For some unknown reason my question is not
    showing up in outlook express (newsgroups) so have had to sign up with
    Google and do it from there. Hope you are able to view this reply.

    Its not a disco unit just an ordinary record deck. Part of a seperates
    system. The 20mA is correct.
    No information on the adapter to say if its AC or DC / Regulated or
    not. It came with the deck (provided by Dual) I would imagine that its
    AC as its use is to be used from a house circuit to cut the voltage
    from 230v to 12v. You would probably know better.
    solid line
    with a dotted line underneath?

    Yes. To confirm,

    Input: 230V~+-10%/50Hz/1VA

    (The Plus+ sign before the 10% is placed above the Minus- sign)

    Output: 12V-/20mA

    (The Minus- sign after the 12V is placed above 3 dots...)

    The only other information on the adapter is as follows:

    285418
    NS/349/12345/K/601315
    IP20
    FWGB
    Made in Germany to BS6301
    Indoor use only

    It can be taken apart as it is fixed together by two screws. There is
    no other information on the inside.

    Appreciate your help
    Vic
     
  4. Andre

    Andre Guest

    I guess the adapter only supplies a pre-amp.
    Just try a standard one, but TAKE CARE FOR CORRECT POLARITY!!!

    BR,

    Andre
     
  5. NSM

    NSM Guest

    | Hi
    | Would appreciate some advice on the above. The adapter was part of a "Dual
    | record deck" (CS455). Unfortunately the adapter cable was damaged and it
    no
    | longer works. Does anyone know what one I could use as a replacement for
    the
    | "Dual deck"?

    Assuming you want to replace the adapter any universal one will do. Or if
    you can find a 12 V adapter, as long as it supplies 20 mA or more it will
    work. Just be sure the polarity is correct.

    N
     
  6. James Sweet

    James Sweet Guest

    Don't go too overboard on the current capacity, a 12v 800mA adapter for
    example will likely put out considerably more than 12v at only a 20mA load.
     
  7. And some of those universal adapters will put out more than 12 V when set
    for 3 V with a light load. Check the voltage with a multimeter before
    plugging it in to your equipment.

    --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/
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    Important: Anything sent to the email address in the message header is ignored.
    To contact me, please use the Feedback Form in the FAQs.
     
  8. Vic

    Vic Guest

    Hi N
    Thanks for your reply. It was the "mA" that I was unsure of mainly and the
    polarity. Argos do one here:
    http://www.argos.co.uk/webapp/wcs/s...&langId=-1&searchTerms=9828908&go.x=8&go.y=11
    which I assume would be ok.

    I was asked earlier if it was DC out which isn't mentioned on the adapter
    but according to the specs at this site:
    http://www.compassnet.com/concept/tables/CS455.htm
    it runs a DC motor so AC to DC adapter needed. Is that correct?

    Many thanks again N
    Vic
     
  9. NSM

    NSM Guest

    | Hi N
    | Thanks for your reply. It was the "mA" that I was unsure of mainly and the
    | polarity. Argos do one here:
    |
    http://www.argos.co.uk/webapp/wcs/s...&langId=-1&searchTerms=9828908&go.x=8&go.y=11
    | which I assume would be ok.

    I'm stunned at the 1200mA output. That usually means a switch mode supply.
    If you can find one that's 200 or 300 mA that'd be better. Also, it's a good
    idea to check the voltage if you have a meter. If not, I often set the
    voltage at 3V and crank it up one step at a time until the device works OK.
    These things do deliver too much voltage at light load.

    12V=/20mA is a DC out system all right. However, if the power supply powers
    the actual motor, then that current can't be right.

    This setup is puzzling. Can you scan the label on the power supply and post
    it somewhere?

    NM
     
  10. Vic

    Vic Guest

    Thanks to all for your help so far.
    NM
    Have uploaded 3 pictures to "alt.binaries.test" newsgroup (sorry about the
    size) under the heading "AC Adapter". Hopefully it will be near the top of
    the list. It is a busy newsgroup. Have also done a voltage check again on
    the above adapter but its completely dead. I only hope it hasn't damaged the
    deck as well. Also tried looking for anyone that repairs these adapters but
    no luck so far. Whether its viable in terms of cost remains to be seen but
    it would probably be a safer option than using a universal adapter. Anyhow
    I'll await your recommendations once you've seen the pictures.
    Vic
     
  11. Vic

    Vic Guest

    N
    Ignore the "AC Adapter AC Adapter.zip" files in "alt binaries.test" as these
    are quite large. I have re-uploaded the same pictures (saved as .jpg) but
    the size is a great deal smaller. You are now looking for "AC Adapter Pics".
    Hopefully they will be up there when you go there. It took 3 hours for the
    original ones to get there.
    Vic
     
  12. NSM

    NSM Guest

    | N
    | Ignore the "AC Adapter AC Adapter.zip" files in "alt binaries.test" as
    these
    | are quite large. I have re-uploaded the same pictures (saved as .jpg) but
    | the size is a great deal smaller. You are now looking for "AC Adapter
    Pics".
    | Hopefully they will be up there when you go there. It took 3 hours for the
    | original ones to get there.

    Unfortunately the turnover there is so great I doubt there's a good way to
    find them. I show 45000+ files currently and a rapid upload of new ones!

    N
     
  13. NSM

    NSM Guest

    | N
    | Ignore the "AC Adapter AC Adapter.zip" files in "alt binaries.test" as
    these
    | are quite large. I have re-uploaded the same pictures (saved as .jpg) but
    | the size is a great deal smaller. You are now looking for "AC Adapter
    Pics".
    | Hopefully they will be up there when you go there. It took 3 hours for the
    | original ones to get there.

    This player doesn't have any AC power cord? It's totally powered by the
    adaptor?

    Neil
     
  14. Vic

    Vic Guest

    This player doesn't have any AC power cord? It's totally powered by the
    Neil
    Yes I know its totally powered by the adapter. I assumed it was an AC
    adapter as it converts an AC current to a DC current to power the
    deck. What kind of adapter is it in that case? Would using an adapter
    that cuts the voltage down to 12v be ok? If so I have one already
    which is a regulated AC/DC adapter. Other information is:
    Input 220-240v AC 50Hz
    Output: 3, 4.5, 6, 7.5, 9, 12v
    DC 300mA

    Vic
     
  15. James Sweet

    James Sweet Guest

    The vast majority of "AC" adapters output DC, the name simply means that it
    adapts the 120v (or 240v) AC line to whatever the end device requires, this
    can be AC or DC but it's still an "AC adapter" either way. You really need
    to know for sure what voltage and polarity the device requires to choose the
    correct adapter, I still suspect in this case that 20mA is not correct,
    could there be a zero or two missing? Perhaps it has a typo?
     
  16. Vic

    Vic Guest

    Hi James
    Thanks for your reply.

    You obviously know more than I but the following may help.
    I've always said it was an AC adapter for the reasons you've mentioned. In
    this case it cuts the voltage from 230v down to 12v. It is powering the
    decks DC motor. I also know what polarity it should be. My main concern was
    the "20mA" on the adapter. I have a replacement but the "mA" is "300mA" and
    I was worried that this might cause some damage. Hope that clears up any
    misunderstandings.
    Not on my part, although I did wonder whether the "20mA" should actually
    read "200mA". You can see a picture of the adapter with specs here:
    http://www.vicsplace.pwp.blueyonder.co.uk
    Would be interested in your reply after you've seen it.
    Your help is appreciated.
    Vic
     
  17. James Sweet

    James Sweet Guest

    Well that does certainly say 12V DC 20mA, though I suspect it might be a
    typo on the adapter. I say go for it and try the 300mA adapter, it should
    work just fine.
     
  18. NSM

    NSM Guest

    | Well that does certainly say 12V DC 20mA, though I suspect it might be a
    | typo on the adapter.

    No. Notice the 1 VA. It's a puzzle though.

    | I say go for it and try the 300mA adapter, it should
    | work just fine.

    Yes.

    N
     
  19. Franc Zabkar

    Franc Zabkar Guest

    The adapter's 230V/1VA rating is consistent with a 20mA/12V output,
    but not with 200mA.


    - Franc Zabkar
     
  20. I looked at the photo, I didn't see any "dc" in the information on the
    case. Has the original poster gone to Google and googled on the part
    number to see what responses he gets? That works great in a lot of
    instances.

    H. R.(Bob) Hofmann
     
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