Question about Panasonic PT-51HX40 51" Rear Projection Television

1 Answer

Its shuts off after pressing the power button

Hello
I have PT-51HX40
Its pansoinc.
I was told to replace SKT392 since it had some mixing of colors.
Now I have replaced the SKT392 but it will shutt off in few seconds.
I do have the service manual can you please tell what section I need to be looking at .
Thanks

Posted by on

  • nooramin_ali Nov 24, 2008

    I am technical person I have taken the boards out for trouble shooting.

    Thanks

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 21 Answers

Hi there. I suggest you put the old IC's back in and see if shutdown still exists. It's unlikely but possible one of the new chips is shorted. Check for "catwhisker" shorts in soldering with a magnifier, cleaning the flux off your connections with a toothbrush and 99% (anhydrous) alcohol.

Be sure you replaced them with exact parts. You mentioned using STK392 -??? (power rating missing). Biasing and running voltages are different for each type. None of the blue power resistors around each IC should be discolored. ANY off-tolerance resistor will make it difficult (if not impossible) to properly converge without stressing the IC's.

Finally, if the set shuts down in the SOS mode, the front LED (s) will blink with an error code. You make no mention of this. The speed of shutdown seems to me like a dead short on one of the power supply lines. Also, this set was designed to work with the chassis removed from the set and the boards installed. You shouldn't need to work with the board pulled.

Good luck, Mark

Posted on Nov 25, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

What colors are the bulbs in this tv


hello there are 3 bulbs in the tv red green blue

regards
shaun

Jan 17, 2010 | Panasonic PT-51HX40 51" Rear Projection...

1 Answer

Screen turns to a red color after 10 min 9( not the bulbs)


you might need a new color wheel, id get a second opinion on that.

Oct 01, 2009 | Panasonic PT-51HX40 51" Rear Projection...

1 Answer

Tv wont turn on> is there a reset switch?


reset button can apply when the tv turns on. first the tv has a short circuit and has to be repaired in order to be able to reset the tv to the original settings created in the program as brightness, color etc.
your tv now needs a visit to the workshop first, to turn on.

Apr 14, 2009 | Panasonic PT-51HX40 51" Rear Projection...

1 Answer

Panasonic projection


Hello joselrivera1,
You have 2 defective Chip.
ed0d659.jpg
Part number: STK392-010
List price $10 each

Best regards
circuitcity


Jun 22, 2008 | Panasonic PT-51HX40 51" Rear Projection...

1 Answer

Red tinted double image above the normal image.


hello consumer MG,
you need to change your STK392-110. Replacing those 2 chip will fix your set.
c7f2e81.jpg
best regards
circuitcity
www.interactiverepair.com

Jun 08, 2008 | Panasonic PT-51HX40 51" Rear Projection...

1 Answer

Diagnostic Mode?


Press and hold power & action button on front of tv hold untill tv turns off release - Set will come back on with other menu just press channel up . this should clear setup mode.

Nov 18, 2007 | Panasonic PT-51HX40 51" Rear Projection...

1 Answer

It shuts off all by its self but not all the time


If I was working on this set I would look for cold solder joints on IC501 Vertical output IC.

Sep 03, 2007 | Panasonic PT-51HX40 51" Rear Projection...

2 Answers

Color shift


There is going to be 2 ICs. Both should be replaced at the same time.

May 12, 2007 | Panasonic PT-51HX40 51" Rear Projection...

1 Answer

Multi color snow


The most common problems with Panasonic's is the "DG" board. It usually is not the leat expensive module to replace and cannot be repaired it has to be replaced.

May 02, 2007 | Panasonic PT-51HX40 51" Rear Projection...

Not finding what you are looking for?
Panasonic PT-51HX40 51" Rear Projection Television Logo

Related Topics:

48 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

Josh Whitehead
Josh Whitehead

Level 3 Expert

1146 Answers

The Knight
The Knight

Level 3 Expert

68427 Answers

Are you a Panasonic Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...