Sony KV32S22 Screen Blanking
Yup, me again!
I got the set so it will come on however if I put a signal to it, the picture blanks out. The color is good and when I have no signal present, the crt cathode voltages are 140 red, 130 green, 140 blue. I put a scope on the IK signal and it seems to be around 2vp-p with the static screen. When I hook the cable up to the tuner, the scope jumps about twice the size and then blanks out. Is my CRT shot or do I keep looking? How can I determine what is blanking the CRT? Disconnect the IK signal from the CXA2025? Then if it still blanks, look for something else? The picture control is set up all the way on the menu. I don't have the original remote and the universal one I have will not allow me to select the menu item. I can change the menu item however cannot select it. Figured there was a reason it was on the curb... Just makes me think that if the flyback was bad, destroyed the HOT and power supply, it must have been working ok before then. Where should I be looking for the signal that triggers the standby led to flash constantly at startup. Is that due to the system waiting for the cathodes to heat up? It flashes about 3-5 times and then the picture comes on. While the led is flashing, there is no IK signal. Kirk S. |
One more thing, when the screen blanks, no HV. Or is that a side effect of
the blanking? On a black screen, ie. video input, if I turn up the screen control, I get red retrace lines that bow into the middle. Time to look at each signal on the scope and see what sort of IK pulse is present. Perhaps I'm losing it somewhere... Kirk S. "Kirk S." wrote in message ... Yup, me again! I got the set so it will come on however if I put a signal to it, the picture blanks out. The color is good and when I have no signal present, the crt cathode voltages are 140 red, 130 green, 140 blue. I put a scope on the IK signal and it seems to be around 2vp-p with the static screen. When I hook the cable up to the tuner, the scope jumps about twice the size and then blanks out. Is my CRT shot or do I keep looking? How can I determine what is blanking the CRT? Disconnect the IK signal from the CXA2025? Then if it still blanks, look for something else? The picture control is set up all the way on the menu. I don't have the original remote and the universal one I have will not allow me to select the menu item. I can change the menu item however cannot select it. Figured there was a reason it was on the curb... Just makes me think that if the flyback was bad, destroyed the HOT and power supply, it must have been working ok before then. Where should I be looking for the signal that triggers the standby led to flash constantly at startup. Is that due to the system waiting for the cathodes to heat up? It flashes about 3-5 times and then the picture comes on. While the led is flashing, there is no IK signal. Kirk S. |
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