Re: 42" Panasonic plasma TV model: TH-42PX60U dead

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N_Cook

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Apr 23, 2011, 3:42:00 AM4/23/11

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Sidney <sidn...@yahoo.com> wrote in message
news:27a07052-b46d-4014...@a19g2000prj.googlegroups.com...
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/20040312120415/www.herald.ns.ca/cgi-bin/home/disp
layphoto?2002/12/22+126.raw+1019+Business+

http://web.archive.org/web/20040229023255/http://www.herald.ns.ca/cgi-bin/ho
me/displaystory?2002/12/22+126.raw+Business

http://groups.google.com/group/hfx.forsale/browse_thread/thread/43940ce83231
ab85/4e4c696fbf04837f?q=sidney+tv+repair&rnum=1#4e4c696fbf04837f

http://www.nesda-ohio.com/iwaynet/pubhtml/May02/May18.html
http://www.nesda-ohio.com/iwaynet/pubhtml/SonyAudMod.html
http://www.nesda-ohio.com/iwaynet/pubhtml/Oct02/Oct028.html
http://www.nesda-ohio.com/iwaynet/pubhtml/Oct02/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

Mark Zacharias

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Apr 23, 2011, 6:34:59 AM4/23/11

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"N_Cook" <div...@tcp.co.uk> wrote in message
news:iotvpg$dq$1...@dont-email.me...

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.

Meat Plow

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Apr 23, 2011, 2:08:47 PM4/23/11

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On Sat, 23 Apr 2011 08:42:00 +0100, N_Cook wrote:

> Sidney <sidn...@yahoo.com> wrote in message

> news:27a07052-b46d-4014-a154-
f6e827...@a19g2000prj.googlegroups.com...

Or lightly fuse it and cross your fingers.

--
Live Fast Die Young, Leave A Pretty Corpse