Question about JVC AV-56WP30 56" Rear Projection Television
The TV is about 3 years old and the picture has become very dark. The brightness/contrast buttons do not seem to work at all. The bulb has been replaced and is brand new, but the picture is still dark. Any suggestions?
This problem seems like it may be related to the HV section or the video section. The HV section would effect the voltage at the ancde of the CRTs, while the video section would effect the video level at the cathode of the CRTs. My experience tells me that the HV section is more then likley the cause. I would suggest that if you have a HV probe use it to test the HV level on each of the CRTs this will tell you if the HV section is working correctly. Then test the video signal level using an oscilloscope on the CRT socket at the pins corresponding to the video input (Cathode).
If you do not have the equipment to do this nor a background in electronics I would suggest that you have a TV technician repair this for you.
I hope this helps
Posted on Jan 05, 2009
Its the cause of internal settings that should be made proper.
just click the link and download the exact model of your unit and check out for the settings in the trouble shooting and picture adjustment options.
Posted on Jan 05, 2009
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Posted on Jan 02, 2017
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