Tv shut off by it self?

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buckie
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I was looking at Q801 I left

I was looking at Q801 I left the srew out  of Q801 were it srews to the heat sink  would that cause Q801 to blow after 5 mins.

Larry Dillon
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Oh my yes it would for sure.

Oh my yes it would for sure. Make sure you have plenty of heat sink compound on the transistor too.  Dont forget to tighten that screw down good, and recheck and double check your work, always.

buckie
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Larry Dillon said: Oh my yes

Larry Dillon said: Oh my yes it would for sure. Make sure you have plenty of heat sink compound on the transistor too.  Dont forget to tighten that screw down good, and recheck and double check your work, always.

 were can I buy some heat sink compound would radio shack have it

 

Larry Dillon
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Yes they would have that. or

Yes they would have that. or I would hope they did. If not, Please do not settle for some crap stuff, go to www.mcmone.com and order the right stuff, if radio shack does not have the compound thats for heat transfer.

buckie
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Hello  just got back from out

Hello  just got back from out of town I got my new parts I was checking voltages between Q801 s point and p2a on T801 the voltages v was 187v then it went down slowly to 0.

Larry Dillon
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So you replaced the regulator

So you replaced the regulator you left the heat sink screw off of?  How about the regulator driver IC.  That problem got taken out also when you left off the screw.  Also double check all of the resistors in the curcuit.

buckie
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Larry Dillon said: So you

Larry Dillon said: So you replaced the regulator you left the heat sink screw off of?  How about the regulator driver IC.  That problem got taken out also when you left off the screw.  Also double check all of the resistors in the curcuit.

I was checking  resistance on that  curcuit between T801 Q801 the resistance was starting out 0 ohms and would go to high around 10,000 ohms

 

buckie
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Hello I got my tv working I 

Hello I got my tv working I  had  3 bad  DIODES  D816 D822 D817 the video ant so great if i got the DIODES in wrong would that make the video have lines in it the sound is great.

buckie
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Hello my tv is working good I

Hello my tv is working good I thank everyone for the help it was a great learning experiance .the  100 watt light bulb could  have made the video not work right because when i put the fuse in the tv video was not playing good so I turn the tv off then the next day I turn it on  it worked good.

Larry Dillon
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Glad to hear you finally got

Glad to hear you finally got the beast to work.  Yes the fuse is supose to be used to stop the parts from buring out in case there is a short.  Once you seen the TV come on and play, your supose to replace the fush and do all fianal adjustments from there.

buckie
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Larry I will say this is the

Larry I will say this is the best  tv repair site that is out there. step by step repair education ,

buckie
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I have been watching Q801 the

I have been watching Q801 the heat sink gets hot . 30 mins playing .

Larry Dillon
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You did put in the screws to

You did put in the screws to the heat sink correct?  Oh and you also put heatsink compound on the back of the device before mounting it on the heat sink?  Thatnheat sink will get hot, but not so hot you can fry an egg on it.

buckie
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yes I put  compound and the

yes I put  compound and the screw. the tv is working better than ever i watched my tv for 6 hours with  no touble .

old-foggy
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I have a similar problem with

I have a similar problem with the same set, except the fuse did not blow up.   Same red LED signal 5 times on/off, pause and then on/off again.   There is 9 volts on the T802 but the relay doesn't click. 

No voltage on T801 and Q801.  There's 2 DC volts on pin 8 of IC801.     I jumped a 100 watt bulb on both ends of the fuse but it did not light.

I tested (with a multimeter) D816, D817, and D822, Q801 - they seem to be OK.  I am planning to order and replace IC801 and Q801.   But before I do so, can Larry Dillon or Buckie please email me the schematic (the set was bought open box) so I can make some more voltage checks ?

Lord Crystallion
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can somebody email me the

can somebody email me the schematics pt-53tw53 pnasonic 53inch hdtv serge1er2003@yahoo.com preffered for the convergence board

buckie
buckie's picture
Yes i fixed the TV it was a

Yes i fixed the TV it was a transistor Q801.

Shockmaster
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I am in need of the

I am in need of the schematics for the PT53wx panasonic projection. It has become Personal Now! vger2010@netzero.com

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