willyrivero
New Member
Hi.
I'm trying to fix this TV. It shows raster with retrace lines but no video. I have no schematics. Supply voltages are fine on IC CXA2025AS.
CXA2025 is the Y/C/RGB/SYNC/ DEFLECTION.
With my scope I traced the video signal to the pins 4 and 5 (Yin and Cin respectably) the signal is always there. but there's no signal out from pins 20, 22, and 24 which are Rout, Gout, and Bout.
I checked the xtal's too, they're fine
The funny thing is that the video signal randomly comes out from the IC and the screen comes back to life again sometimes for hours but then video signal dissappears again just like that, without any cause. This "on" and "off" all the time got me confussed.
Am I missing something, Can anyone help?.
I'm trying to fix this TV. It shows raster with retrace lines but no video. I have no schematics. Supply voltages are fine on IC CXA2025AS.
CXA2025 is the Y/C/RGB/SYNC/ DEFLECTION.
With my scope I traced the video signal to the pins 4 and 5 (Yin and Cin respectably) the signal is always there. but there's no signal out from pins 20, 22, and 24 which are Rout, Gout, and Bout.
I checked the xtal's too, they're fine
The funny thing is that the video signal randomly comes out from the IC and the screen comes back to life again sometimes for hours but then video signal dissappears again just like that, without any cause. This "on" and "off" all the time got me confussed.
Am I missing something, Can anyone help?.
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