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From: Wild_Bill on 13 Dec 2009 17:43
It kinda looks like the 041M03 number is an in-house number used by the
board builder, as compared to the choke/transformer number 387M01.

TDK probably refers to the component manufacturer for the choke/xfmr, and
the 9522 is very likely the year/week date code 1995, week 22.

If the other TO-220 device has a similar series of numbers/letter on it, the
device may not be a voltage regulator.

Finding a cross reference for the 041M03 number is probably going to be a
matter of luck if it is just an in-house number.

You may need to examine the associated components after the output pin to
get an idea of the correct replacement part, if it is a voltage regulator.
The input pin should probably go directly to a 12V source/power terminal if
it's a VR.

There may also be other components which have failed.

You might be able to get some clues as to the input and output voltages from
a factory service manual wiring diagram, usually available for inspection at
a dealership. Some counter guys will even make photocopies.

--
Cheers,
WB
..............


"ghiotom" <dghioto(a)comcast.net> wrote in message
news:6fa42466-c6b2-4aff-b638-b53dcd2d807f(a)g12g2000yqa.googlegroups.com...
On Dec 13, 2:45 pm, David Hester <huskit...(a)gmail.com> wrote:
> > Can you give us more information, eg number of pins, package style,
> > logo, date codes of other chips on same board, photo, etc.
>
> > The number may consist of two parts, a marking code and a date code.
>
> > - Franc Zabkar
> > --
> > Please remove one 'i' from my address when replying by email.
>
> TO-220 3 leads. Below 041M03 is R535 with the Motorola symbol. This is
> a vehicle information center from a 1996 Jeep.

Here's a picture:
http://i747.photobucket.com/albums/xx113/ghiotom/IMG00006-20091213-1448.jpg

From: bob urz on 13 Dec 2009 20:28
David Hester wrote:
> Can't find any info on this device. I need to know what the output
> voltage should be. I'm assuming 3 volts, but would like to know for
> sure. It is getting red hot on the circuit board and is outputting
> around 7 volts.

mad guess is its a typical 3 terminal TO220 voltage regulator.
Probably 12 volts in and unknown out. Could be 5, could be 3, or?.
You need to check the voltage ratings and values of the input and
output caps on the regulator. That might help give a clue.

If its getting hot, it may just be overloaded. You then need to figure
out how to load shed on the output side and fire it back up and see
what happens.

Try to see what kind of parts the regulators output is hooked to. If you
can ID any chips, look them up and find there voltage ratings.

Look close on the PC board for any signs of burnt parts or
discoloration. Also look for bulged or leaking electrolytic capacitors.
a shorted cap could overload the regulator.

bob
From: Franc Zabkar on 13 Dec 2009 23:24
On Sun, 13 Dec 2009 12:34:40 -0800 (PST), ghiotom
<dghioto(a)comcast.net> put finger to keyboard and composed:

>> TO-220 3 leads. Below 041M03 is R535 with the Motorola symbol. This is
>> a vehicle information center from a 1996 Jeep.
>
>Here's a picture:
>http://i747.photobucket.com/albums/xx113/ghiotom/IMG00006-20091213-1448.jpg

The MC33060AP is a "Precision SWITCHMODE Pulse Width Modulator Control
Circuit":
http://www.datasheetcatalog.org/datasheet/motorola/MC33060AD.pdf

Could the subject TO-220 device be an NPN chopper, or N-channel
MOSFET, in a SMPS?

The pinout looks like BCE or GDS, from L to R.

The SMPS could be generating 50VDC (?) for a vacuum fluorescent
display.

FWIW, here is a VFD reference design for automotive applications:
http://www.embeddeddesignindia.co.in/STATIC/PDF/200908/EDIOL_2009AUG07_MCP_ESL_AN_01.pdf?SOURCES=DOWNLOAD

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
From: ghiotom on 14 Dec 2009 16:33
On Dec 13, 11:24 pm, Franc Zabkar <fzab...(a)iinternode.on.net> wrote:
> On Sun, 13 Dec 2009 12:34:40 -0800 (PST), ghiotom
> <dghi...(a)comcast.net> put finger to keyboard and composed:
>
> >> TO-220 3 leads. Below 041M03 is R535 with the Motorola symbol. This is
> >> a vehicle information center from a 1996 Jeep.
>
> >Here's a picture:
> >http://i747.photobucket.com/albums/xx113/ghiotom/IMG00006-20091213-14...
>
> The MC33060AP is a "Precision SWITCHMODE Pulse Width Modulator Control
> Circuit":http://www.datasheetcatalog.org/datasheet/motorola/MC33060AD.pdf
>
> Could the subject TO-220 device be an NPN chopper, or N-channel
> MOSFET, in a SMPS?
>
> The pinout looks like BCE or GDS, from L to R.
>
> The SMPS could be generating 50VDC (?) for a vacuum fluorescent
> display.
>
> FWIW, here is a VFD reference design for automotive applications:http://www.embeddeddesignindia.co.in/STATIC/PDF/200908/EDIOL_2009AUG0...
>
> - Franc Zabkar
> --
> Please remove one 'i' from my address when replying by email.

Franc, I think you are right, the more I look at it. It does power a
VFD. I feel kind of silly thinking it was a voltage regulator, there's
a 7805 right there next to it. Thanks everybody for the help. I think
something might be shorted on the secondary to cause it to run so hot.
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