[TechAssist] Re: Mitsubishi TV CS2723R chas VM1-A-C23R -low contrast, poor color [UPDATE]
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 26 Jul 2005 23:07:38 -0400
Thanks for the tips. This CRT board desn't have an R680 and there is no
PIP module either.
I think I have a bad CRT. Turning up the red drive brings in the missing
red from the image but it causes severe bleeding across the image on the
screen. Tried replacing the red CRT driver and some caps on the CRT
board to no avail.
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
Gary McCartney wrote:
> Mitsubishi TV CS2723R chas VM1-A-C23R -low contrast, poor color
>
> This set came in with thin black lines across center of screen and the
> picture was jumping up and down.
>
> I have replaced about 22 caps in vertical, power supply, and jungle that
> show signs of leakage.
>
> Now I have a stable picture and CRT color temperature is not bad, but
> the contrast is low with sub-cont. pot adjusted to max. and the color is
> strange. It is like the red in the chroma is very weak. People's faces
> look pale blue or greenish. Going through the tint range does not
> correct it.
>
> Is this a matter of changing all the caps around the jungle IC? (I found
> 2 that were noticably leaking) or is there a known fault other than that
> for these problems?
>
> Thanks for any help.
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