Question about Akai PTH5498 54" Rear Projection HDTV-Ready Television

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Semiconductor heatsink i am trying to replace stk392-040 semicconductor on projection tv. i have taken off heatsink box to try to gain access to semiconductor. but cannot take them off. any suggestions. can you buy the whole board or do you have to remove semiconductor some way..or would a local tv repair help replace .

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HI I'm having problem with blown fuse by the power input. after I plug in the power cord the fuse is blown seconds later. is the board bad...............\\

Posted on Jul 12, 2007

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They can be very stubborn. If youve taken the heat sinks off the circuit bd so it is in no danger just knock em off of there they can be stuck good. If is the circuit bd your talking about then I guess you realize they are soldered in to the bottom

Posted on Apr 23, 2007

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Posted on Jan 02, 2017

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You will be watching and the tv will go black & volume goes away almost like it turns off for 45 seconds then it will turn back on first with picture then sound for like 2 to 3 mins then it happens...


Try pulling the back plastic cover off and colling it with a box fan and see if it still happens. You may have a heat buildup on one of your heatsinks. If you are technically inclined, you can use a temp probe and locate the offending component and clean off the old heatsink paste and apply a fresh coat then screw it back down.
If not, at least try to locate the overheating part and try to find a brave Geek who loves soldering irons.
Other than that, it may be time to find a real TV tech.

Mar 07, 2010 | Sony Grand WEGA KDF-42WE655 42" Rear...

1 Answer

Hitachi 57F500A Projection Color TV all of the sudden is very blurry. Tried magic focus with no help. Checked all connections and there is nothing wrong. All other TV's in house work fine.


Have the convergence IC's replaced in this model. They are the two large Black IC's located on a large alumium heatsink. Have replaced.

Thk please leave comment.....

Oct 09, 2009 | Televison & Video

2 Answers

Has a leak in the heater core , as it fogs up the inside of the car and smells of antifreeze. is it hard to replace this?


IF YOU ARE NOT FAMILIAR ON HOW TO REPLACE ...THEN YES IT CAN BE A BEAR... FIND A HAYNES MANUAL OR SUCH FROM AUTO PARTS STORE BEFORE TAKEN ON THAT PROJECT..

Oct 06, 2009 | 1993 Toyota Paseo

1 Answer

Green color has taken over tv


OK IF THE COLOR GREEN HAS "TAKEN OVER YOUR TV" AND YOU USE A CABLE BOX, ITS PROBABLY THE CABLE BOX. I HAD THE SAME PROBLEM. YOU JUST NEED TO EITHER HIRE SOMEONE TO COME TAKE A LOOK AT THE TV AND/OR CABLE BOX, OR BUY A NEW CABLE BOX AND/OR TV! SIMPLE,HUH?

May 31, 2009 | Philips 50P8341 50" Rear Projection...

2 Answers

TV Issue Still


Hi Sam,
I was researching on the problem, and have quick question to ask , have tried putting the system in auto tunning mode ? To retune the channels.
If retuning doesnot do the job, the system would have to be taken in for repairs as the Tuner card inside the TV would have to either serviced or replaced


Thanks
Proton

Oct 19, 2008 | Televison & Video

1 Answer

Sony KP61HS10 and timewarner digital cable box. Don't know which is the problem. Problem is a blue/white ghost on all channels. Tried unplug both units, tried flash focus. Shadow/ghost is now curved image...


I'm going to guess that these ghosts are of different colors too. This is most likely a convergence problem. Try resoldering the pins on the convergence ICs first. If that fails, replace them.
These ICs are large and black, attached to a heatsink. They will be marked STKxxx.
Keep us posted.
Dan

Apr 18, 2008 | Televison & Video

1 Answer

Mitsubishi ws 46807 convergence


convergence fail. try resoldering the 2 convergence ICs in the middle baord located on the large heatsink. this might fix unless the problem has gone it course

Mar 21, 2008 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

Toshiba 65NH84


You might have burned out the red color crt. In projection TV's there are 3 CRT's (one for blue one for red, and one for green). If you have the other 2 colors but no red I would assume this is your problem. You should be able to get it fixed for around $150.

Jan 13, 2008 | Toshiba 65HX81 65" Rear Projection...

2 Answers

Toshiba TN50x81 50 Inch TV most of the images seem to have a ghost image behind them


Remove the right speaker grill, there you will see some adjustemt knobs, I never tried it but might be helpfull.

Nov 10, 2007 | Toshiba TN50X81 50" Rear Projection...

1 Answer

How to deassemble the TV set


Look for largest heatsinks on chassis.Easiest and best procedure is to pull the chassis,replace IC's,solder any /all bad

connects,esp. the solid metal jumpers that deliver B+ to IC's.

Re-assemble,test.Reset convergence.

Oct 15, 2007 | Toshiba 57H82 57" Rear Projection...

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