Identify IC to mod sony alarm clock to 12H mode

Discussion in 'General Electronics Chat' started by lelo, Aug 23, 2008.

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  1. lelo

    Thread Starter New Member

    Aug 23, 2008
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    hi guys,

    i have a small mod project.

    i plan to mod a sony alarm clock (dream machine): ICF-C318 which only have 24H mode to 12H mode.

    i have done this to previous model which use IC sanyo LM8560.

    but this time, i'm facing a problem to identify the clock IC of ICF-C318.

    it have 36-pin. the wordings at IC is:
    872B06
    58J
    8PX0

    i believe this IC supports radio wave clock syncronizing.

    i've searched the web with no result.

    i attached the picture here, could anyone help to identify this IC?

    Or who have ICF-C318S (C318/S) model to share its circuit.

    regards
     
    Last edited: Sep 2, 2008
  2. lelo

    Thread Starter New Member

    Aug 23, 2008
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    hi guys,

    from my study on the circuit, and assumed that the 12H/24H selection is by supplying the pin with voltage or open, i filtered it to pin#5, #9, #14 and #17.

    but i'm poor at soldering.
    could anyone suggest a method to tap the trace with a jumper cable thingy and disconnect the voltage?

    thanx
     
  3. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    You can try lifting the legs of the IC, may be better than cutting traces.
     
  4. lelo

    Thread Starter New Member

    Aug 23, 2008
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    hi,

    thanx for the reply.
    i really dont want to de-solder and mess with the IC.

    do u think, by applying a reverse voltage, i.e. -4V can cancel out the voltage of 4V??

    regards
     
  5. thesavo

    New Member

    Aug 28, 2013
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    I have a Sony dream machine icf-c218. I'm in the USA and want the opposite. I want it to show in 24-hour mode, not 12-hour. It looks like we could benefit from each other.
    I now this thread is ancient history by now.
     
  6. thesavo

    New Member

    Aug 28, 2013
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    *know - editing is disabled

    Here is a picture of my Clock IC

    [​IMG]


    It looks like a 36 pin SMD chip. The readout on mine is
    872B06a
    58J1
    1NX0T

    I would have annotated my own picture but I can't tell which corner is pin one.
     
  7. thesavo

    New Member

    Aug 28, 2013
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    Does yours have 3 solder pads on the bottom of the logic board? MY ICF-C218 (US) does. I wonder if it is some sort of Serial I/O port? Perhaps we should look at this thing. My theory is that perhaps this is used at the factory to program it for the destination market or country.

    It's next to the clock IC (assuming the other 28 pin DIP is for radio functions). Keywords we should be looking for are: IC101, INP 1, INP2

    [​IMG]

    http://i1344.photobucket.com/albums.../Sony_ICF-C218/Bottom-per30-2_zps034a58bb.png
     
  8. thesavo

    New Member

    Aug 28, 2013
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    * it's so silly that you can't edit a post.

    Here is a working link to the composite overlay.
    [​IMG]
     
  9. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    A thread belongs to the OP (original poster). Trying to take over someone elses thread is called hijacking, which is not allowed at All About Circuits.

    In addition, you have practiced the arcane art of necromancy, the revival of a long dead thread. Likely the OP (Original Poster) has solved his problem in the years that has passed, or thrown it away, or something.

    Start your own thread on the subject.
     
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