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From: Dave Moore on 21 Sep 2007 06:44
My brothers PTV crashed and one of the SMPS
controller IC's appears to be bad.

The hot side controller IC P/N 612664-2 I have identified
as a Motorola MC34056

But I can't seem to find any info on the cold side controller
P/N 612771-1

Anyone know what the Motorola equivalent for this part
is? (or any other equivalent for that matter)

Or, I'd even settle for a tip on where I might be able to
acquire the original.



Damn. I wanted to post the Model number of the set, but
the durn paper I wrote it on seems to be hiding from me.
I guess that's what I get for cleaning up
and getting things organized around here )`:

Thanks
Dave Moore


From: Franc Zabkar on 21 Sep 2007 20:01
On Fri, 21 Sep 2007 05:44:56 -0500, "Dave Moore"
<phoneyaddress(a)phoneyaddress.com> put finger to keyboard and composed:

>My brothers PTV crashed and one of the SMPS
>controller IC's appears to be bad.
>
>The hot side controller IC P/N 612664-2 I have identified
> as a Motorola MC34056

That should be MC34065.

P/N 612664-2 crosses to an NTE1765, as does the MC34065:
http://www.nteinc.com/specs/1700to1799/pdf/nte1765.pdf

> But I can't seem to find any info on the cold side controller
>P/N 612771-1

FWIW, this URL claims that the IC is made by Motorola, not Philips,
and is equivalent to an SC78104P:
http://www.tv-forums.com/forum/TV_Equipment_C4/Projection_TV_Forum_F24/magnavox_52_tv_FP5250w101_IC_612771-1_P7816/

IIRC, the "SC" prefix denotes a special order. In any case, if the IC
is what I think it is, then it is probably mask ROMmed.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
From: Dave Moore on 22 Sep 2007 00:49

"Franc Zabkar" <fzabkar(a)iinternode.on.net> wrote in message news:l7l8f3l0p66l753mp24dcuf0rnkgg7nfqo(a)4ax.com...
: On Fri, 21 Sep 2007 05:44:56 -0500, "Dave Moore"
: <phoneyaddress(a)phoneyaddress.com> put finger to keyboard and composed:
:
: >My brothers PTV crashed and one of the SMPS
: >controller IC's appears to be bad.
: >
: >The hot side controller IC P/N 612664-2 I have identified
: > as a Motorola MC34056
:
: That should be MC34065.
:
: P/N 612664-2 crosses to an NTE1765, as does the MC34065:
: http://www.nteinc.com/specs/1700to1799/pdf/nte1765.pdf


Yeah, thanks for the correction.
The SER archive thanks you too :-)

:
: > But I can't seem to find any info on the cold side controller
: >P/N 612771-1
:
: FWIW, this URL claims that the IC is made by Motorola, not Philips,
: and is equivalent to an SC78104P:
: http://www.tv-forums.com/forum/TV_Equipment_C4/Projection_TV_Forum_F24/magnavox_52_tv_FP5250w101_IC_612771-1_P7816/


Yeah, I had already flagged that guys post and got nowhere with
that SC part number either.

No NTE cross and no datasheets found by Google

But Thanks anyway Franc.

Dave Moore




:
: IIRC, the "SC" prefix denotes a special order. In any case, if the IC
: is what I think it is, then it is probably mask ROMmed.
:
: - Franc Zabkar
: --
: Please remove one 'i' from my address when replying by email.


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