[TechAssist] Re: zenith sy3288dt too much red

Check the 120K resistors on the CRT board (I believe the reference numbers
are R5110, R5111, and R5112). They are a very common problem to either go
high in value or to open completely on these 9-1298 video output modules.
The originals were 1/2 watters but it is a good idea to replace them with 1
watters.

Bob Waterman, CET®
Service Manager
Gemini Computer, TV, & Security Alarm Systems, Inc.
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxxxxxxx
geminitv@xxxxxxx

----- Original Message -----
From: "adam miller" <adamt123@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, June 26, 2002 3:52 PM
Subject: [TechAssist] zenith sy3288dt too much red


>
>
> hello all,
>
> i have a zenith television model sy3288dt that looks as though when it
first
> comes on the picture is overly saturated with red. if you observe the 'red
> out' signal coming from the ta8891, it is signifigantly higher than the
> green or blue. the feedback signal looks huge as well, i checked the
voltage
> on the ta8891 and saw that pin 29, red cut off filter is around 2v, p28
(red
> drive filter) is 1.6v, the reason i think this signifigant is because the
> respective pins for green and blue are about twice the amount. i added a
> voltage divider as per a data sheet i found on this chip, and with it i
can
> completely remove red, or i can completely saturate it, but in bettween
> looks washed out. is this an indication of a bad gun in the picture tube,
or
> is there a cheaper alternative to approach this problem?
> troy miller
> riteway computer and electronic service
>
>
>
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