I need some help 'cause Italian NG or formus doesn't help me much..
Many years ago i've much probably caused a damage to a Daewoo DTG2997 crt Tv (chassis C1000)
connnecting a computer to it, one 12v may have been connected for error to the ground and came in
to the tv through the RCA video/audio cable's ground, now AV inputs, apart antenna, doesn't work
well, if i put a RGB signal through the SCART AV cable the image is visible but without any sync,
if i put a videocomposite signal the screen is empty/dark (dark grey), so i don't understand why
antenna video signal is displayed well and other inputs not.. (i'm not an expert).
theese are the relevant pages of schematics:

http://img148.imageshack.us/img148/3738/c1000pg10.jpg
http://img600.imageshack.us/img600/6532/c1000pg1.jpg
http://img24.imageshack.us/img24/1968/c1000pg2.jpg
http://img851.imageshack.us/img851/5985/c1000pg3.jpg
http://img834.imageshack.us/img834/9867/c1000pg8.jpg

Many thanks in advance.

Your chance of inputing the sync to that TV are slim to none.
You would have to input it to IC1501 you would have to have the right
polarity and voltage level or you could magna smoke the whole set.
Solution is to use a modulator from say a VCR or VTR that would give
you the RF signal to input to the tuner.

The obvious place to start is at the sync input pin on the SCART
connector. From pin #16, it becomes P/S on connector PV04

From there, I kinda ... lose it on the schematics.
I'm assuming, here, that SCART doesn't use sync-on-green
signalling, but uses the 'blanking' input in the form of
a 'sandcastle' signal (i.e. sync plus blanking info).

The obvious place to start is at the sync input pin on the SCART
connector. From pin #16, it becomes P/S on connector PV04

From there, I kinda ... lose it on the schematics.
I'm assuming, here, that SCART doesn't use sync-on-green
signalling, but uses the 'blanking' input in the form of
a 'sandcastle' signal (i.e. sync plus blanking info).

Thank you, for now i comment what i understand..
so you say that P/Sw is used as a sync input (+blank)?
i don't knew it well... so maybe the faulty part is only that
signal? Since i have made an error on reconnecting cables to Crt,
(i have connected a 2 little wire connector with a X-ray signal on it (??)
with an empty socket, there was 2 empty sockets, on the PSU, with
the optional function of a P/C signal for switching on PSU from mo.bo.)
tv now seems to have one more problem, i hope i solve this soon,
for now i need to know, the RGB input from scart card goes on the teletext
card to be MUXed with TEXT rgb signal, to avoid a problem to the Mux,
i have connected with wire the scart rgb IN with the out in this same card,
also the signal named F/Sw (?? before was P/Sw), in the out connector near
P/Sw (named only Sw) there is a signal Sh, is this a sync signal also?
BYE.