Question about Panasonic PT-46G40 46 in. Rear Projection Television

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Rgb guns my technician took out the green gun because it was not working.He replaced the gun with another but it is not focusing on the screen.He does not have a service manual.how to get the gun to work? thanks ian

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Re: rgb guns

Try another technician (and a good one this time). Seriously, it's his responsibility.

Posted on Sep 25, 2005

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Have a Sony KP-65WV600, already replaced d board once, and replaced convergence ic's once also. Now as soon as I turn unit on, turns to red screen and shuts off, video that is, audio works ok, noticed...


Check High voltage Block.After replacing ic's (STK convergence ic's) you need to adjust Black&White scale.Turn ALL screen adjustments to min.Turn TV on and adjust screen slowly for each gun (I would start with Red first ) when you came to point that you see red background with white lines across, at that point G2 is too high (that will cause TV to shut down,don't worry just lowered adjustment and turn tv back on) so adjust to proper voltage and do the same for each gun.After that, adjust focus for each gun (again all controls are on High Voltage Block and HVB is mounted on front of your tv after you take speaker gril out) black box with 6 controls' screen RGB, focus RGB .
You should do that in dark room in order to get perfect Black&White scale,when all guns are adjusted properly you will see grey picture.Make sure 'Color" adjustment on your display is down to 0. Another step is convergence adjustment ,Flash Focus etc.If TV stil shuts off after all, your Red picture tube is short inside,take crt pcb from tube,make sure TV is unpluged from power before that, and turn Tv on .If stays On tube need replacment...good luck)

Aug 22, 2011 | Sony KP-65WV600 65" Rear Projection...

3 Answers

My Akai projection tv the color has bad color and double vision. Why?


If you have an older model projection set then the Convergence Ic's have gone bad. This type of repair usually cost around $250.00 to repair and can be done in the home by a technician.

Dec 27, 2010 | Akai Projection Televisions

1 Answer

I have a samsung 47 inch rear projection w/self focus there is a continuos blue shadow around images is there a quick fix


The blue is caused by the RGB gun alignment. Green is a fixed gun and Red and Blue are adjustable. In my Mitsubishi, the guns are motorized and can initially be adjusted (course) with the remote. There are more detailed adjustments that can be made if you purchase the service manual. I paid approx $19.00 on line 3 years ago and it is a complete manual. Unfortunetly I don't remember the site. To do a complete alignment, there are steps to take: starting with entering a code using the remote to enter the setup. To make a long story short, I had my tv aligned 3 or 4 times over 5 years under the extended warranty. After watching the tech, who was good, but under time constraints, it was clear that most anyone could do it if they could read and follow instructions.

Mar 05, 2010 | Samsung Projection Televisions

1 Answer

I have a Philips 50p8342 television. When it is


Sounds like you are tripping your crowbar circuit. This is most commonly caused by one of the Red Green or Blue brightness adjustments, adjusted too high. The crowbar circuit protects your high voltage guns from getting damaged. I know this because I just did this myself. My adjustments were behind the lower rear panel in a small box screwed to the chassis. There are 6 tuning pots on mine. 3 for focus of the RGB and 3 for brightness of the RGB. The focus ones didn't seem to have any effect on the crowbar circuit. However, by turning the brightness down on each of the RGB pots I could get the T.V. to stay on indefinately.

Oct 18, 2009 | Philips 60P8341 60" Rear Projection...

1 Answer

Greenish picture, or lack of red.


Not tuner........Did you check RGB screen adjust up front
behind access panel?.....Possible CRT issue.............T.

Nov 27, 2007 | Sony KP-46WT510 46" Rear Projection HDTV

2 Answers

Sp43w6hp red gun convergence problem


Hi!
as i see in your comment.. you have defective convergence correction amplifier ICs. the RED GREEN and BLUE (RGB) is amplified by the STK ICs. your RED convergence is not working good in the STK ICs! Replace the STK ICs a new one to get back the normal colors. Thanks...

Nov 06, 2007 | Samsung HCM422W 42" Rear Projection...

1 Answer

CONVERGENCE Problem cannot adjust ( green gun )


Compare your rgb voltages and your cathode voltages(green, red, blue) and also access your service mode settings. It might not be the STK-392-150 that is defective.

Sep 26, 2007 | Sony KP-43T90 43" Rear Projection...

1 Answer

Jvc av56wp74 blue shadow


my suggestion would be...to replace the focus block..john

Aug 10, 2007 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Blue out of focus; casting blue "glow"


Be very carefull replacing the fluid as leaks will short stuff out and are messy.

Jun 12, 2007 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Toshiba 43H70 HD Projection TV


this is a convergence failure, there are hundreds of posts about it on this website you should be able to find everything you need

May 23, 2007 | Toshiba 43H70 43" Rear Projection...

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