PLL chip source needed...
Electronics Forum Index Electronics
Circuits, theory, electrons and discussions.
 
 FAQFAQ   MemberlistMemberlist     RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 
Google
 
Web ElectronicsHelp.net
PLL chip source needed...

 
Post new topic   Reply to topic    Electronics Forum Index -> Components
Author Message
NightRunner
Guest
Posted: Wed Mar 09, 2005 6:10 am    Post subject: PLL chip source needed... Reply with quote
Hi all,

I have here an old Yamaha RX-300U "Natural Sound" stereo receiver I've
grown rather partial to, and this afternoon I found it to be
completely dead in all functions and display but the amplifiers are
still functioning. My best guess on such short notice is that the PLL
controller has died, and was wondering if anyone might know a source
for this part.

It is a 42 pin DIP package and has the following markings:

YAMAHA XB919AO
PLL CONTROLLER
3214 8F2

I'm also investigating the power supply but would think that if that
was at fault the amps wouldn't turn on. Could be a low voltage
condition though I suppose.

Thanks for any help!!

- NR



"The usual approach of science of constructing a mathematical
model cannot answer the questions of why there should be a
universe for the model to describe. Why does the universe go
to all the bother of existing?"

- Stephen Hawking

---------------------------------------
Amateur Astronomy Page:
http://www.angelfire.com/alt2/nightrunner/skyview.html

Our Webcam:
http://web.infoave.net/~missy1/cam/webcam.html

Back to top
Jim Adney
Guest
Posted: Fri Mar 11, 2005 5:42 am    Post subject: Re: PLL chip source needed... Reply with quote
On Wed, 09 Mar 2005 22:09:34 -0500 NightRunner
<jackfrostnippin@yernose.com> wrote:

Quote:
I have here an old Yamaha RX-300U "Natural Sound" stereo receiver I've
grown rather partial to, and this afternoon I found it to be
completely dead in all functions and display but the amplifiers are
still functioning. My best guess on such short notice is that the PLL
controller has died, and was wondering if anyone might know a source
for this part.

I would investigate which of the usual functions are still working:
preamp(s), AM/FM tuner, display, amps. You may be right, but I fixed
an receiver last year which didn't light up, had no display, but still
amplified. It was easy to fix once I found the schematic; it was just
an open resistor that fed a power supply which only powered the tuner
and display.

I was expecting all kinds of expensive problems, but then it turned
out to be simple and cheap.

-
-----------------------------------------------
Jim Adney jadney@vwtype3.org
Madison, WI 53711 USA
-----------------------------------------------
Back to top
 
Post new topic   Reply to topic    Electronics Forum Index -> Components All times are GMT
Page 1 of 1

 
 You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Home & Living New Topics
Contact Us
Powered by phpBB