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TV without red turns off

L

Lanzar

Jan 1, 1970
0
I have a television with a strange problem. When i start the tv it
takes about 10-15 seconds before the picure appears. And also the red
color is missing, so the piture is bluegreen (but no lines). And then
after about a half minute red fields starts flashing across the
screen, and then it turnes off. Any idea what cause this?
 
J

Jana

Jan 1, 1970
0
You should always mention the make and model number of your TV set when
posting.

Generally speaking, it sounds like the CRT is most likely defective. CRT
replacement in a typical TV set, or computer monitor, generally costs more
than a new unit.

--

JANA
_____


I have a television with a strange problem. When i start the tv it
takes about 10-15 seconds before the picure appears. And also the red
color is missing, so the piture is bluegreen (but no lines). And then
after about a half minute red fields starts flashing across the
screen, and then it turnes off. Any idea what cause this?
 
T

testortool

Jan 1, 1970
0
Probably a bad CRT. I have an almost mint early 70s Sony Trinitron 13" TV
that has a "flaky" red gun that cuts in and out kind of like what you're
seeing. Usually when CRT color guns go bad, the red one goes first.
 
S

Sam Goldwasser

Jan 1, 1970
0
Jana said:
You should always mention the make and model number of your TV set when
posting.

Generally speaking, it sounds like the CRT is most likely defective. CRT
replacement in a typical TV set, or computer monitor, generally costs more
than a new unit.

Could very well be something other than the picture tube.

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B

Barney

Jan 1, 1970
0
Lanzar said:
I have a television with a strange problem. When i start the tv it
takes about 10-15 seconds before the picure appears. And also the red
color is missing, so the piture is bluegreen (but no lines). And then
after about a half minute red fields starts flashing across the
screen, and then it turnes off. Any idea what cause this?

As a test try swapping the drives to the CRT over. If it's the CRT then it
will still flash red, if it's something else it will flash either green or
blue.
 
A

Art

Jan 1, 1970
0
Check the drive voltages at each of the crt cathodes, compare the red with
the other two. do this with the socket attached and removed from the crt.
Trouble shoot the red video drive circuitry before totally condemning the
crt. If a projection set, try swapping the red drive pwb to one of the other
crts and see if the set functions, remove the red crt drive and see if the
set functions. ETC, Good Luck
 
J

James Sweet

Jan 1, 1970
0
If it's a Zenith you probably have a short in the picture tube, otherwise
who knows, you have to post the brand and model for anyone to help you.
 
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