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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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42" Panasonic plasma TV model: TH-42PX60U dead
42" Panasonic plasma TV model: TH-42PX60U, year: Nov 2006, no power,
no blinking or standby LED lights. The TV was on while this happened. Upon troubleshooting I discovered F401=8 amp ceramic time lag fuse to be open. From extensive googling after no obvious shorts in power supply using Fluke DMM model 29 series II. I found the following common repair tips: Q406=N-ch MOSFET # RJK5020=Panasonic # B1DEKQ000003=shorted R410=10 ohm, 5w ceramic thermal cut off=Panasonic # D1F5100E0003=open F401 & F402=8 amp ceramic time lag fuse= Panasonic # K5D802BNA005= one or the other open well on this TV none of the above parts are defective except F401. According to a Panasonic service bulletin for a similar model: http://www.tvrepairtips.org/files/tip/286/tt-08-27.pdf they say to add a C426=ECQB1H103JZ but on that bulletin it's if Q406 is shorted but not on mine and the board on the service bulletin is somewhat different than mine. I haven't yet replaced F401 or placed a 100 watt light bulb in place. But would like some tips before I proceed. Thanks. Sidney® ™ Dartmouth, Nova Scotia Canada http://web.archive.org/web/200403121...1019+Business+ http://web.archive.org/web/200402290...6.raw+Business http://groups.google.com/group/hfx.f...696 fbf04837f http://www.nesda-ohio.com/iwaynet/pu...y02/May18.html http://www.nesda-ohio.com/iwaynet/pu...onyAudMod.html http://www.nesda-ohio.com/iwaynet/pu...02/Oct028.html http://www.nesda-ohio.com/iwaynet/pu...02/Oct029.html |
#2
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42" Panasonic plasma TV model: TH-42PX60U dead
Sidney wrote in message
... 42" Panasonic plasma TV model: TH-42PX60U, year: Nov 2006, no power, no blinking or standby LED lights. The TV was on while this happened. Upon troubleshooting I discovered F401=8 amp ceramic time lag fuse to be open. From extensive googling after no obvious shorts in power supply using Fluke DMM model 29 series II. I found the following common repair tips: Q406=N-ch MOSFET # RJK5020=Panasonic # B1DEKQ000003=shorted R410=10 ohm, 5w ceramic thermal cut off=Panasonic # D1F5100E0003=open F401 & F402=8 amp ceramic time lag fuse= Panasonic # K5D802BNA005= one or the other open well on this TV none of the above parts are defective except F401. According to a Panasonic service bulletin for a similar model: http://www.tvrepairtips.org/files/tip/286/tt-08-27.pdf they say to add a C426=ECQB1H103JZ but on that bulletin it's if Q406 is shorted but not on mine and the board on the service bulletin is somewhat different than mine. I haven't yet replaced F401 or placed a 100 watt light bulb in place. But would like some tips before I proceed. Thanks. Sidney® ™ Dartmouth, Nova Scotia Canada http://web.archive.org/web/200403121...-bin/home/disp layphoto?2002/12/22+126.raw+1019+Business+ http://web.archive.org/web/200402290....ca/cgi-bin/ho me/displaystory?2002/12/22+126.raw+Business http://groups.google.com/group/hfx.f...d/43940ce83231 ab85/4e4c696fbf04837f?q=sidney+tv+repair&rnum=1#4e4c696 fbf04837f http://www.nesda-ohio.com/iwaynet/pu...y02/May18.html http://www.nesda-ohio.com/iwaynet/pu...onyAudMod.html http://www.nesda-ohio.com/iwaynet/pu...02/Oct028.html http://www.nesda-ohio.com/iwaynet/pu...02/Oct029.html ++++ open up the fuse and see if it failed gently (probably just getting tired in old age) or catastrophically so something else failing caused it to fail |
#3
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42" Panasonic plasma TV model: TH-42PX60U dead
"N_Cook" wrote in message
... Sidney wrote in message ... 42" Panasonic plasma TV model: TH-42PX60U, year: Nov 2006, no power, no blinking or standby LED lights. The TV was on while this happened. Upon troubleshooting I discovered F401=8 amp ceramic time lag fuse to be open. From extensive googling after no obvious shorts in power supply using Fluke DMM model 29 series II. I found the following common repair tips: Q406=N-ch MOSFET # RJK5020=Panasonic # B1DEKQ000003=shorted R410=10 ohm, 5w ceramic thermal cut off=Panasonic # D1F5100E0003=open F401 & F402=8 amp ceramic time lag fuse= Panasonic # K5D802BNA005= one or the other open well on this TV none of the above parts are defective except F401. According to a Panasonic service bulletin for a similar model: http://www.tvrepairtips.org/files/tip/286/tt-08-27.pdf they say to add a C426=ECQB1H103JZ but on that bulletin it's if Q406 is shorted but not on mine and the board on the service bulletin is somewhat different than mine. I haven't yet replaced F401 or placed a 100 watt light bulb in place. But would like some tips before I proceed. Thanks. Sidney® ™ Dartmouth, Nova Scotia Canada http://web.archive.org/web/200403121...-bin/home/disp layphoto?2002/12/22+126.raw+1019+Business+ http://web.archive.org/web/200402290....ca/cgi-bin/ho me/displaystory?2002/12/22+126.raw+Business http://groups.google.com/group/hfx.f...d/43940ce83231 ab85/4e4c696fbf04837f?q=sidney+tv+repair&rnum=1#4e4c696 fbf04837f http://www.nesda-ohio.com/iwaynet/pu...y02/May18.html http://www.nesda-ohio.com/iwaynet/pu...onyAudMod.html http://www.nesda-ohio.com/iwaynet/pu...02/Oct028.html http://www.nesda-ohio.com/iwaynet/pu...02/Oct029.html ++++ open up the fuse and see if it failed gently (probably just getting tired in old age) or catastrophically so something else failing caused it to fail I have seen some Samsung models on which the fuse goes for no reason other than the fuse holder is defective - not rated for high enough amperage. The fuses are GMA size ceramic types. The holders in question are ordinary looking except they have a sort of black plastic case in which the actual metal holders are nestled.. There was obvious overheating - a discolored and crusty appearance to the metal, and the plastic was deformed sometimes even to the point of melting somewhat. A fuse should never get hot like that - it was the ohmic resistance between the holder and the fuse ends. A brand new supply from Samsung failed the same way within days. A solder-in pigtail type fuse solved the problem for good. Mark Z. |
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