Transformer for battery charger

Discussion in 'Electronic Repair' started by WbSearch, Sep 21, 2003.

  1. WbSearch

    WbSearch Guest

    Have a Ryobi charger, M/N CTH1202, which the 120 volt side of the transformer
    is open, no obvious broken wires or overheating. Anyway the following is
    stamped on the transformer: ES-66-287-1245. Does anyone have any idea where I
    can get a replacement transformer? Ryobi doeasn't service individual partsd
    for the charger. Thanks in advance.
     
    WbSearch, Sep 21, 2003
    #1
    1. Advertisements

  2. WbSearch

    John Todd Guest

    On 21 Sep 2003 14:53:07 GMT, WbSearch <> wrote:
    >Have a Ryobi charger, M/N CTH1202, which the 120 volt side of the transformer
    >is open, no obvious broken wires or overheating. Anyway the following is
    >stamped on the transformer: ES-66-287-1245. Does anyone have any idea where I
    >can get a replacement transformer? Ryobi doeasn't service individual partsd
    >for the charger. Thanks in advance.


    Have you opened it up? Often the fine primary wire parts close
    to where it connects to the outside world. Also some transformers
    have thermal disconnects inside the paper wrapping.



    --
    _______________________________________
    John E. Todd <>

    Note: Ensure correct polarity prior to connection.
     
    John Todd, Sep 21, 2003
    #2
    1. Advertisements

  3. WbSearch

    Bill Janssen Guest

    WbSearch wrote:

    > Have a Ryobi charger, M/N CTH1202, which the 120 volt side of the transformer
    > is open, no obvious broken wires or overheating. Anyway the following is
    > stamped on the transformer: ES-66-287-1245. Does anyone have any idea where I
    > can get a replacement transformer? Ryobi doeasn't service individual partsd
    > for the charger. Thanks in advance.


    My charger went shorted on the primary. I just ordered a new charger
    as the price was right and rebuilding would be too difficult.

    Good luck on finding parts, I tried that and gave up.

    Bill K7NOM
     
    Bill Janssen, Sep 21, 2003
    #3
  4. WbSearch

    WbSearch Guest

    I did open the wrapping to check if the wires came off the terminals. Don't
    see anything wrong. Wires are connected so I assume the break is internal.
     
    WbSearch, Sep 21, 2003
    #4
  5. WbSearch

    mike Guest

    WbSearch wrote:
    > I did open the wrapping to check if the wires came off the terminals. Don't
    > see anything wrong. Wires are connected so I assume the break is internal.


    Another place they put the thermal fuse is against the core, inside the
    winding bobbin. or molded into a plastic bobbin.
    mike

    --
    Bunch of stuff For Sale and Wanted at the link below.
    laptops and parts Test Equipment
    4in/400Wout ham linear amp.
    Honda CB-125S
    400cc Dirt Bike 2003 miles $550
    Police Scanner, Color LCD overhead projector
    Tek 2465 $800, ham radio, 30pS pulser
    Tektronix Concept Books, spot welding head...
    http://www.geocities.com/SiliconValley/Monitor/4710/
     
    mike, Sep 21, 2003
    #5
  6. WbSearch

    WbSearch Guest

    Thanks, didn't see any fuse except the 1 amp on the mains input-which didn't
    blow.
     
    WbSearch, Sep 21, 2003
    #6
  7. WbSearch

    SHIMON Guest

    (WbSearch) wrote in message news:<>...
    > Have a Ryobi charger, M/N CTH1202, which the 120 volt side of the transformer
    > is open, no obvious broken wires or overheating. Anyway the following is
    > stamped on the transformer: ES-66-287-1245. Does anyone have any idea where I
    > can get a replacement transformer? Ryobi doeasn't service individual partsd
    > for the charger. Thanks in advance.



    answer: most of the times the termal fuse that inside the transformer
    blow. to replace it you have gently and carfuly remove the paper on the primery
    side of the transformer (120 [v] side) and will found it replace it white the
    rating of temperature.
    in other cases the resson is a semiconductur such as diode tra' etc.
     
    SHIMON, Sep 21, 2003
    #7
  8. WbSearch

    Bill Janssen Guest

    WbSearch wrote:

    > Thanks, didn't see any fuse except the 1 amp on the mains input-which didn't
    > blow.


    My unit had two fuses. One was soldered in and looks like a resistor. It
    was on the transformer.

    Bill K7NOM
     
    Bill Janssen, Sep 21, 2003
    #8
  9. WbSearch

    WbSearch Guest

    Will take a much closer look, thanks.
     
    WbSearch, Sep 21, 2003
    #9
    1. Advertisements

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads
  1. WbSearch

    Ryobi battery charger transformer

    WbSearch, Sep 22, 2003, in forum: Electronic Repair
    Replies:
    4
    Views:
    2,254
    WbSearch
    Sep 26, 2003
  2. Tel boy
    Replies:
    2
    Views:
    2,024
    Tel boy
    Nov 1, 2004
  3. rovmike

    Transformer to build 12 volt battery charger

    rovmike, May 20, 2013, in forum: General Electronics Chat
    Replies:
    9
    Views:
    884
    rovmike
    May 20, 2013
  4. juntjoo
    Replies:
    15
    Views:
    561
    Arouse1973
    Jun 18, 2015
  5. SickSquirrel

    I need a charger for a power bank ...

    SickSquirrel, Aug 5, 2016, in forum: General Electronics Chat
    Replies:
    11
    Views:
    478
    SickSquirrel
    Aug 8, 2016
  6. jls667
    Replies:
    3
    Views:
    437
    duke37
    Sep 15, 2016
  7. Inglorious89

    Looking for advice for an LED flag project

    Inglorious89, Oct 16, 2016, in forum: Electronic Projects
    Replies:
    26
    Views:
    672
    Inglorious89
    Oct 17, 2016
  8. Schectonater

    Looking for eyelets that work for .1" spacing

    Schectonater, Oct 17, 2016, in forum: Datasheets, Schematics, Manuals and Parts
    Replies:
    9
    Views:
    416
    dorke
    Oct 17, 2016
Loading...