TV - Non Constant White Screen. Sound Works as does PIP.
 

Ok so heres the deal

Early 90's Proscan TV.

About a week ago my TV started to display a solid white background with
no retrace lines. The sound works fine along with all menus and tv
features. Ex: I can change the channels and the channel number will pop
up in the upper right hand corner in full color or the menu system will
display in the spectrum of colors as intended. Sometimes the tv will
lose the white screen and display the correct image, however this is
rare. PIP works well and it displays 2 seperate images as they are
meant to be displayed, however when PIP comes on the background turns
from white to a medium gray. Im not really sure where to go with this
one. Could it be the ABL?


TV White Screen(Mostly Constant). With Sound. PIP Works (2 Seperate
images).

TV - Non Constant White Screen. Sound Works as does PIP.
 

Nubly wrote:
Ok so heres the deal

Early 90's Proscan TV.

About a week ago my TV started to display a solid white background with
no retrace lines. The sound works fine along with all menus and tv
features. Ex: I can change the channels and the channel number will pop
up in the upper right hand corner in full color or the menu system will
display in the spectrum of colors as intended. Sometimes the tv will
lose the white screen and display the correct image, however this is
rare. PIP works well and it displays 2 seperate images as they are
meant to be displayed, however when PIP comes on the background turns
from white to a medium gray. Im not really sure where to go with this
one. Could it be the ABL?

Does it do it with an Svideo input(channel 90)?

www.techdata-kicksass.net


TV White Screen(Mostly Constant). With Sound. PIP Works (2 Seperate
images).

TV - Non Constant White Screen. Sound Works as does PIP.
 

Yeah it does it with any input. Input 1 or 2. Any coax input or analog
OTA.


Does it do it with an Svideo input(channel 90)?

www.techdata-kicksass.net

TV White Screen(Mostly Constant). With Sound. PIP Works (2 Seperate
images).

TV - Non Constant White Screen. Sound Works as does PIP.
 

Nubly wrote:
Yeah it does it with any input. Input 1 or 2. Any coax input or analog
OTA.


Does it do it with an Svideo input(channel 90)?

www.techdata-kicksass.net

TV White Screen(Mostly Constant). With Sound. PIP Works (2 Seperate
images).

Ok, in case you think they're all the same, I know it's going to be
there on video 1/2 and tuner. If you have good video on Svideo, channel
90, then the comb filter is the problem. If it really is there on
Svideo, then measure the G1 voltage on the crt, but if the pip screen
shows up, that most likely isn't the issue. G1 should be roughly 18 to
22 volts dc.

www.techdata-kicksass.net

TV - Non Constant White Screen. Sound Works as does PIP.
 

Tech Data wrote:

Ok, in case you think they're all the same, I know it's going to be
there on video 1/2 and tuner. If you have good video on Svideo, channel
90, then the comb filter is the problem. If it really is there on
Svideo, then measure the G1 voltage on the crt, but if the pip screen
shows up, that most likely isn't the issue. G1 should be roughly 18 to
22 volts dc.

www.techdata-kicksass.net

Yeah, the Svideo(90) is also white. The PIP will be on svideo and the
image will be black as required, and the background will still be on a
channel playing correct sound on the gray background. Ill tear the
belly of the beast open tonight and see what i can find.

TV - Non Constant White Screen. Sound Works as does PIP.
 

How does one test the G1 voltage and where can i locate a test point.

TV - Non Constant White Screen. Sound Works as does PIP.
 

"Nubly" wrote in message
oups.com...

How does one test the G1 voltage and where can i locate a test point.

Is that the G-Spot?

But seriously - Grid 1. Assuming you are not talking triacs,
http://www.repairfaq.org/sam/crtfaq.htm

or

http://www.angelfire.com/electronic/...Multigrid.html

if not a Kine.