NEC LCD TV LNT-30CW no colour
TonyS
I located a faulty transformer, one of 8, and replaced it.
Backlight is working now.
However, the only way to get colour is when I use the component inputs.
I don't believe the 2 faults are connected, in fact I don't even know if the
colour problem could be fixed by setup. I got no service manual.
Has anyone out there an idea where I could start?
Cheers
Tony
PS:(I am running the unit on an temporary PSU.
The original PSU was missing (24V 6A) and the one I ordered on eBay (China)had
the 4 pins wrongly connected, believe it or not! Rotated by 90 deg. Lucky it
just shorted and didn't reverse the voltage...)
TonyS
Franc Zabkar
put finger to keyboard and composed:
>I was given this defective LCD TV. It had no working backlight.
>I located a faulty transformer, one of 8, and replaced it.
>Backlight is working now.
>
>However, the only way to get colour is when I use the component inputs.
>I don't believe the 2 faults are connected, in fact I don't even know if the
>colour problem could be fixed by setup. I got no service manual.
>
>Has anyone out there an idea where I could start?
Have you checked the 4.43MHz crystal (or 8.86MHz)?
Have you tried feeding the TV an NTSC signal (from a region 1 DVD) via
the composite inputs?
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
TonyS
> On Wed, 11 Nov 2009 11:12:45 +0800, TonyS <scarb...@gmail.nspm.com>
> put finger to keyboard and composed:
>
>
>
The thing has a big 144pin VSP9427B chip "Color Decoder and Scan-Rate Converter"
from Micronas which is clocked by a single 20.25 MHz crystal.
> Have you tried feeding the TV an NTSC signal (from a region 1 DVD) via
> the composite inputs?
don't have such a beast...
Thanks anyway.
It's not commercial, so I am using only the component inputs for now.
>
> - Franc Zabkar
Tony