On Thu, 13 Jul 2006 21:58:23 -0500, "Deke" no
wrote:


I just bought a second hand sony Trinitron tv and when I brought it
back home the color had gone and it only showed perfect black and
white
images.

from various threads from the net, it seems the fault could be with
the
chroma chip/circuit.

Now can you please tell me where i can find such part inside my tv?
The
idea is to prod around the chroma chip with an insulated tool to see
if
I can make the color come and go.

Any other suggestions I would be grateful for. Bytheway the teletext
seems to have color

cheers,

from London,

Alfredo

How do I recognize the chroma chip?

Sorry, I missed the start of this thread.

If 'London' means: London UK, you probably have a PAL set.
Color (or is it colour :-) on teletext and black and white
pictures is usually very simple:
There is a 4.43 MHz or 8.86 MHz crystal on the board, next to a
trimmer. The tuning of that trimmer probably has gone bad.
(The chroma chip is the chip closest to that crystal. But who
cares :-)

Find the region for the trimmer that shows color. And leave the
trimmer at the center of that region.

If you can't get color on any trimmer setting, replace the
trimmer by a ceramic capacitor; 18 pf comes to mind :-)

--
Kind regards,
Gerard Bok