Question about Sony KP-51HW40 51" Rear Projection Television
Red and Green lamps fade shortly after turning on, then just a blue screen.
The service manual on page 8 shows how to adjust the Red/Blue/Green screen voltages. To get to the adjustment board, take the front speaker grill off (two screws at the bottom left and right) and set it aside. No need to disconnect any wires. Then remove the plywood board with 4 screws that exposes the screen/focus adjustments. The top 3 adjustments are for focus, and you need not mess with these. The bottom 3 adjustments are for Red/Blue/Green screen voltage rough adjustments. My screen showed red lines, so I had to turn the bottom right adjustment with a philips head screwdriver just slightly until the red gun retrace lines where no longer visible.
Posted on Sep 06, 2008
Time to replace the two lamps
Posted on Aug 30, 2008
Wow man. My Sony KP-51HW40 has been fading to blue after about 1 minute of being turned on, but the picture for about the first 30 seconds was perfect.
I did the adjustments you mentioned and fixed my TV in 2 minutes.
Sony and a couple service places they told me about said I needed to spend between $300-$500 to replace all 3 cans. $900-$1,500 without labor fees. What jerks they are for not telling me about this possible fix.
Thanks again for sharing that process. Hope this helps alot of other people.
Posted on Sep 24, 2008
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Posted on Jan 02, 2017
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