I have a Sony Trinitron TV with no picture. I am a technician. I was wondering if you knew of a link where I can download the schematic to troubleshoot this particular model: KQ-27EXR20. And the S/N: 7055253; MANUFACTURED IN MARCH 1992. The picture tube appears to be gone. If you have any further information regarding this model, please reply at your earliest convenience. Sony Corp. is no help WHATSOEVER.

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