AIWA HV-F85AE VCR-help identifying IC304, a "NEC u574 014L"

[Emanuele Girlando]

troubleshooting an AIWA HV-F85AE VCR,
I've found a shorted compnent I am not able to identify.
It is IC304 and seems to be a voltage reference chip (three pin, TO-92
like). It is marked "NEC u574 014L".
I was not able to find it on www.necel.com .
Google didn't help as well.

Can anybody help me?
Thanks.
--
Emanuele Girlando (IW1DHI)
(Remove GETRID. from my E-mail)
http://space.tin.it/clubnet/egirland
mirror at
http://www.qsl.net/iw1dhi

 

[Mark D. Zacharias]

How about contacting an Aiwa distributor and asking them to research "IC304"
for this Aiwa model?

In the U.S an Aiwa distributor is Union Electronics

800-648-6657

Mark Z.

 

[Bill Jr]

Look carefully.
Does it have two of the legs connected together? Made that way?
Sounds like a 33 volt zener type stabilizer used for tuning voltage.
Might just be a uPC574, since they like to leave off some of the letters.

Good Luck,
Bill Jr

 

[Emanuele Girlando]

BINGO!!
It really is a uPC574 from NEC. It a temperature compensated sneer typically
used to stabilize the tuning voltage.
I have successfully replaced it with a Philips TDA1550.
Thank you very much.
Ciao.