[time-nuts] FEI-565A part

[geraldm at iprimus.com.au]

Hi Javier,

I looked everywhere, Thanks. It looks like a match, you beauty.


Cheers


Gerald


>-- Original Message --
>Date: Mon, 05 Feb 2007 13:15:22 +0100
>From: Javier <javier at nebulosa.org>
>To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
>Subject: Re: [time-nuts] FEI-565A part
>Reply-To: Discussion of precise time and frequency measurement
>	<time-nuts at febo.com>
>
>
>Hello,
>
>It is probably a TLC27M24BI quad opamp from Texas Instruments, 
>http://focus.ti.com/docs/prod/folders/print/tlc27m4b.html
>
>Regards,
>
>Javier, EA1CRB
>
>geraldm at iprimus.com.au wrote:
>
>>Hi all,
>>
>>Have decided to get stuck into fault finding my 5650A again. With no replies
>>from FEI over the past 2 months, have decided to trace out the PCB the
good
>>old fasioned way, however the only IC on the 1 inch square PCB PCB has
me
>>completely lost.
>>
>>So to the question, has any one ever come across a device marking of 27M4Bl
>>or possibly a bad i(I) not an L(l)??
>>
>>It's a SMD 14 pin Case751, with Gnd on pin 11 and Vcc on pin 4. This device
>>is on the Rubidium lamp PCB and forms part of the Rb thermal control circuit.
>>
>>I am leaning towards a quad op amp, but it's possible failure makes it
very
>>difficult to diagnose, it could also be a comparator.
>>
>>Any suggestions are welcome.
>>
>>Regards
>>
>>
>>Gerald
>>
>>
>>
>>
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>>  
>>
>
>
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