Question about Panasonic PT-47WX53 47" Rear Projection HDTV

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Will not come on

Set had a convergeance problem. I changed the STK 392-110 ICs for upgrade 392-115s. The set came on and went off. I checked the solder joints and found a loose solder joint on one pin and repaired it. The set came on and went off and now will not come back on. It has power to the board and the power fuse is good. It has been unplugged for abut 36 hours. Anybody with an idea. Also I see many of you have requested and perhaps received a copy of the service (not operating) manual. If some would swend it to me that would be very helpful.
Thank you

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Re: will not come on

Go over you solder joints again and make sure nothing is cross soldered, also check the larger resisters on the board.

Posted on Dec 11, 2007

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Alot of techs recommend using the higher wattage ICs to replace the stock ones, which is never a good idea since the resistors get stressed. Upgrading to the STK394-160 IC is the only upgrade Hitachi recommends but then the values of the resistors need to be changed since the stock resistors will not work with the upgraded ICs

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My tv looks like it is in 3-d. i went to set-up menu, convergence, the red is off and will not move over to line up. it was fine one minute then it was out of wack the next.

The tv 100% have convergence problems,it dead.The tv convergence board,require changes 2 STK convergence ICS and some or all it resistors to solved the convergence problems.The shop,will cost u $300-350 for parts and labors.

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My daughter pressed a button on the remote and the set went completely out of focus with mixed colors.

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1 Answer

My pioneer set has a converge problem

replaced both stk convergence ics.also check
the resistors near the ics with a ohm meter to
see if any are open or burnt.

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They are Big Black ICs will have STK on them they are startup and convergence ICs They control set to turn on and off and convergence. Look for board that has them on it.2 of them together. If they are 110s use 180s ,Let me know what # on STKs you have.

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Rca d40w20 tv convergence and power on problems

The problem is most likely due to a defective convergence IC.

There are two convergence STK ICs located on the convergence board.

You need first to test the ICS, by checking for continuity the pico fuses at the base of the ICs, then replace the faulty STK.

You should trying doing it yourself only if you are a proven electronic repairer.

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2 Answers

Panasonic pt-53tw53 convergence

It looks more like an open solder because you were able to align it properly after replacing the STK ICs, if there was an open resistor(s) you would not be able to get it align.
I would suggest to go back and double check the solder joints on the STK ICs as well add some fresh solder to the resistors nearby the stk392-180.
Good Luck.

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1 Answer

Tv troubleshoot for me

chances are that IC804 has failed. You have two ICs that allow you to converge the three colors. IC804 is used for Red Horizontal and Vertical Convergence and also for Green Vertical Convergence. IC805 is used for Blue Horizontal and Vertical Convergence and also for Green Horizontal Convergence. These ICs run very hot and have a very high failure rate which sometimes will cause damage to resistors in their associated circuits. They are both STK-110 and it's best to replace them both at the same time. It's also a good idea to upgrade them to either STK-150 or STK-180. These will run a lot cooler than the STK-110.

Before replacement do inspect for any open or overheated resistors as I stated earlier. Being you only have problems with Red Convergence the plus and minus power supplies should be okay since they are common to both ICs.

Try They have the Hitachi CZ00433 (STK392-150) in stock for $20.11 ($32.43 retail). These are Hitachi OEMs. I've had very good results replacing STK392-110s with these chips. Do check for open or overheated resistors before replacing these chips

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3 Answers

Colors separated

You need change STK392-560(can use STK392-570)
I guess it happend when holding bolts weaken to radiator.(Check other STK on next radiator)
You have to change STK on right radiator.
Disconnect small connectors. You can l leave Hi Voltage two lines(RED). unscrew board.
Pool board out.
Unscrew STK. Set board verticaly. Just pool STK bu pincet and heatup solder. One by one...
Clean halles.
Set new STK with thermopasta on board in to hallsradiator. Screw up.
Wet contacts by liquid fluse. And sosler them.
Clean up by alcohol...Check for short by lense...
Set up board back...5515c27.gif

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