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

E

Emanuele Girlando

Guest
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
 
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.



--
Please reply only to Group. I regret this is necessary. Viruses and spam
have rendered my regular e-mail address useless.


"Emanuele Girlando" <emanuele_girlando@GETRID.yahoo.com> wrote in message
news:6TKXb.238370$VW.9624161@news3.tin.it...
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
Click to expand...
 
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


"Mark D. Zacharias" <mzacharias@yis.us> wrote in message
news:c0q85q$1ajuo7$1@ID-180484.news.uni-berlin.de...
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.



--
Please reply only to Group. I regret this is necessary. Viruses and spam
have rendered my regular e-mail address useless.


"Emanuele Girlando" <emanuele_girlando@GETRID.yahoo.com> wrote in message
news:6TKXb.238370$VW.9624161@news3.tin.it...
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
Click to expand...
 
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.


Bill Jr <bill@nospam.usa2net.net> wrote in message
ZO2Yb.197123$fH2.182595@twister.tampabay.rr.com...
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


"Mark D. Zacharias" <mzacharias@yis.us> wrote in message
news:c0q85q$1ajuo7$1@ID-180484.news.uni-berlin.de...
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.



--
Please reply only to Group. I regret this is necessary. Viruses and spam
have rendered my regular e-mail address useless.


"Emanuele Girlando" <emanuele_girlando@GETRID.yahoo.com> wrote in
message
news:6TKXb.238370$VW.9624161@news3.tin.it...
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
Click to expand...
 
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