In search of integrated circuits for auto radio repair

[mmlakehouse]

Hello to whomever you may be, I have an outdated Mazda Radio made by Ford which in turn is made by Visteon. I would like to retain the originality of the dashboard trim for aesthetic reasons . There is no repair whatsoever of these radios only replacement and are obsolete to complicate matters. I've included a photo of the suspect components which are both located on a heat sink which were removed from the radio. I believe the component on the right is ST Electronics TO-92 3-PIN +5V Regulator and the component on the left is a National Semiconductor ZIP-11 11-PIN 24 Watt amplifier . If repairable will upgrade it with internal bluetooth components. If anyone can identify either or both of these components and provide replacement information, will forever be grateful . Thank you.

 

[BigBoss]

I guess they are custom design ICs and hard to find in the market.
+5V Regulator can be replaced with LM7805 ( not sure about Pin-to-Pin Compatibility) but the other is very old and I'm afraid it's not possible to find.

 

[mmlakehouse]

Possibly. I did come across this posting which came close to a matching ic identification for the power amplifier.

https://www.edaboard.com/threads/looking-for-st70024ab-datasheet.255726/

 

[dick_freebird]

I'd suggest that, if this is simply the power amp,
that you keep the heat sink, throw away the
components, and cobble up a modern "single
chip audio amp" in their place. But this may
depend on what's not shown, things elsewhere
in the radio that use the regulator, things we
don't know about what kind of amplifier (Class
AB or Class D?) and so on. But you should be
able to do better in today's components-space
for a decent solution. Go check the main players'
application-chooser-thingy that's somewhere
on all their product web pages, and follow the
yellow brick road.

 

[pjmelect]

An internet search says that the 3101fb01 is the same as the TIP32CFP which is a PNP transistor 100V 5A with pinout E-C-B .

 

[mmlakehouse]

Thank you for your information , will definitely help me. I imagine it took awhile , I seemed to get nowhere. Thank you.

--- Updated Mar 29, 2021 ---

I perhaps should have include a photo of the transistor completely removed from the heat sink . It shows that the rear of the transistor isn't metal but black encased plastic .

--- Updated Mar 29, 2021 ---

By the way , it is a NPN transistor .