30 Mar
2003
30 Mar
'03
9:30 a.m.
--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote:
Nope. I'd be nice, though.
Naturally.
Given
nothing but the set; no doc of any kind (have you Googled for a
I assume there's no schematic stuck inside the set (stranger things have
happened...) If you're lucky, the video output stage will be
discrete components and
easy to hack. If you're unlucky it'll be hidden inside a 'jungle' IC...
You also need to get the sync signals in somehow. If you're lucky
(again!), you will find a point at the input of the video amplifier that
also feeds the sync separator -- which means you can feed in composite
video with no problems. After all, the signal at the output of the video
detector stage _is_ composite video, so the set must be capable of
displaying such a signal. The problem comes when this point only exists
within an IC.
If it helps, the tuner is on a seperate board with a 4-wire cable to
the main board. There are a couple of tunable elements (cap, coil),
a few caps, diodes and a single IC - CD2003GP
The usual
Cautionary Parables about working on naked TVs apply.
zzzzap! Be very careful if you work on mains-only sets...
This one is internal batteries or 12V car plug or a 12VDC wall wart.
Of course, the internal voltages are still typical for CRT use, but
no hot-chassis here.
-ethan