At 03:13 PM 6/13/2003 +0100, you wrote:
>Hi!
>
>I has an old IR remote control which has a LM3714AM from sharp. No
>more on the board than the chip, a couple of caps and a small blue box
>(a xtal?). You can have a look at
>
>    ftp://ftp.iac.es/out/dsg/LR3714AM/chip.png
>    ftp://ftp.iac.es/out/dsg/LR3714AM/xtal.png
>
>(the chip is on one side of the PCB and the caps and blue box on the
>opposite)
>
>The thing is that the two pins blue box has one of them broken. I have
>unsuccesfully search the datasheet of the LR3714AM. I think the box is
>the xtal, but at which freq.?

It's a ceramic resonator. The markings are not very clear in your picture
(and probably on the part) but it looks like 455kHz.

http://www.ecsxtal.com/pdf/ztb.pdf

You might have to change those ceramic disk load caps to match the
replacement.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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