Question about Panasonic PT-50LC13 50" Rear Projection HDTV
I have a Panasonic 62 inch projection tv there is a bright green patch at the top left corner, need help to fix this
Posted on Jun 17, 2012
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Posted on Jan 02, 2017
SOURCE: Panasonic TV Shuts off by itself
I had the same problem , Good sign of a cold solder or cracked trace.
On my PT51HX41 after a long check with a magnifying glass I found the problem on the main board just below the AC daughter board there is a Blue rectangular box (relay R801) and it had two cracked solder joints.
Posted on Feb 22, 2009
SOURCE: Panasonic PT-51HX42F
Sometimes, in the Panasonic projection sets, one of the convergence IC's shorts out and draws so much current that one of the resistors next to it glows red hot. The computer senses the extra current and shuts the set back off. This is quite an easy problem to correct, but the set should be serviced by a qualified tech familiar with panasonic projection sets.
Posted on Aug 23, 2007
Panasonic PT53WX42F with same problem. 3 blinks after power on for a few seconds, no picture or sound. Solution: replaced two convergence ICs (STK392-XXX) located on the large green printed circuit board. ICs are very large and screwed into two large heat sinks and soldered to board. Cost is approximately $6 each. Easy to replace if careful. May be able to access solder joints on bottom of board by removing screen on bottom of cabinet or simply remove 4 screws that anchor plastic holder to cabinet and tilt up. I did not disconnect any inter-board connections. Remove heat sink screws. Desolder using suction bulb or solder sucker. Works great. Finish off with solderwick braid if necessary to clear holes. 40 watt iron is enough do not apply too much heat to damage board lands. Remove IC. Clean heat sink by scraping away white heat sync compound. Apply generous amount of heat sync compound to new IC and coat evenly. Align and insert new IC holes, resolder with thin resin core solder being careful not bridge lands. Refasten to heat sink. Clean board and inspect for good joints and no bridging. Refasten plastic board holder. Carefully clean projection lenses while back is off tv. Power up and it should be fixed. Parts are obtainable on-line. Solder tools and board cleaner are available at Radio Shack or on-line also. I spent $20 on parts and supplies. This is not hard just a bit tedious. You can do it.
Posted on Jan 04, 2008
probably lamp gone out. You can change it youself if you still have owners manual should have directions, if not most lamps have instructions in box.
Posted on Aug 11, 2009
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