Sony KV20FV12
 

Unit has a bright blue raster with retrace linesTurn screen way down and get
picture, Blue cathode= 70VDC, Red and green = 179VDC, Unplug picture tube
and same readings. Voltage comming into CRT board at CN705 is
R= .86, G= .86, B= 3.58,
I am thinking Jungle chip (CXA2131CS) Dont have a schematic, Anyone have a
pinout and maybe some voltage readings
Thanks Charlie

Sony KV20FV12
 

I don't want to disappoint you, but from experience this sounds more like a
short in the CRT, and not the jungle chip. You can check the jungle chip by
putting in a standard colour bar test pattern at the input of the set, and
looking at its outputs on a scope.

The service manual for this set is available from Sony. If you want to get
deep in to this set, you will definitely require the service manual.

The jungle chip is rather expensive, and is only available from Sony. I
would not advise changing it, unless you can actually verify that it is bad.
It is very rare that this IC does fail.

--

Jerry G.
=====


"Charlie East" wrote in message
...
Unit has a bright blue raster with retrace linesTurn screen way down and get
picture, Blue cathode= 70VDC, Red and green = 179VDC, Unplug picture tube
and same readings. Voltage comming into CRT board at CN705 is
R= .86, G= .86, B= 3.58,
I am thinking Jungle chip (CXA2131CS) Dont have a schematic, Anyone have a
pinout and maybe some voltage readings
Thanks Charlie

Sony KV20FV12
 

A pinout for the chip(cxa2131cs) would be great
"JerCharliery G." wrote in message
...
I don't want to disappoint you, but from experience this sounds more like
a
short in the CRT, and not the jungle chip. You can check the jungle chip
by
putting in a standard colour bar test pattern at the input of the set, and
looking at its outputs on a scope.

The service manual for this set is available from Sony. If you want to get
deep in to this set, you will definitely require the service manual.

The jungle chip is rather expensive, and is only available from Sony. I
would not advise changing it, unless you can actually verify that it is
bad.
It is very rare that this IC does fail.

--

Jerry G.
=====


"Charlie East" wrote in message
...
Unit has a bright blue raster with retrace linesTurn screen way down and
get
picture, Blue cathode= 70VDC, Red and green = 179VDC, Unplug picture tube
and same readings. Voltage comming into CRT board at CN705 is
R= .86, G= .86, B= 3.58,
I am thinking Jungle chip (CXA2131CS) Dont have a schematic, Anyone have a
pinout and maybe some voltage readings
Thanks Charlie