Hi, Looking for the resistor value, R778 for this monitor. Anyone please.

LG Studioworks 563W
Model : CB563C
FCC ID: BEJCB563C

Thank you.

Regards,
Simon.

R778 = 3R3 2W

Rich

Hi Rich,

Thanks for your info on the R778. I have replaced the opened resistor but the problem is not solved. The horizontal size is too big with pincushion & adjusting the horizontal size using the OSD menu has NO effect. Any comment & advice on this please.

Thank you.

Best Regards,
Simon.

Hi if you remove the resistor and turn on you should have a narrow picture without width or pin/trap control.

If it is still wide check D704 this is a dual diode.

If it is narrow check C719 by replacement or Q709.

Rich

Hi Rich, after removing the resistor the horizontal size is still wide. D704 checked okay. Observed that 2 resistor with sign of overheating & measured their value as follows.
R820 = 1R3
R821 = 1R0
Is this value correct? The color code is not clear. Appreciate if you could send the schematic diagram / service manual to my mailbox.

Thank you.

Best Regards,
Simon.

Check your mail.

Rich

sir, the monitor remains dark for 5 - 10 minuts some times more, and then slowly comes up with normal picture.where could be the problem. please respond to my mail box .thanking all of you

monitor model

aoc 4vn

problem : vertical retrace at the top of screen

thankssss...

Look at this, might help:
http://elektrotanya.podzone.net/?q=showresult&megnev=aoc&megnev2=4vn&kategoria=monitor&kat2=schematics