Question about Panasonic PT-47WX49 47" Rear Projection Television

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Trying to replace convergence chips on a Panasonic 47WX54J

When I took the chips off the foil peeled off on a couple of the pins (maybe the size of a BB) around the hole. Will this make a disconnection?

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It certainly will. This is the connection. I think you may have used a soldering iron that was way too hot for this purpose. You need to get a 20 watt pencil type soldering iron. You will also need to get some small insualted wire to reconnect the new pins to the first solder joint downstream from the pin by following the foil. I hope you are using the proper solder as well. Flux core (not acid core).

Posted on Apr 18, 2009

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Posted on Jan 02, 2017

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Nv5398u bios password


K if this is a laptop you may not have much luck. With a full sized pc its as easy as resetting the password by moving a jumper on the mainboard next to the battery.

For laptops theres a couple of tricks..

1) Unplug
2) Remove main battery
3) Remove the cover panels on bottom
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6) carefully short the center pin to the top pin for 10s
" you can use tin foil, Knife whatever just be very careful.. "

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Another method is to do all the above but with the exception of freezing the bios chip using an upside down of compressed air.

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Printer will not print after installing 2 new ink cartridges


Hi,

There are three (3) reasons for this.
1) There may not be a pool of ink at the exit port (the pre-chamber) that the head can **** from. The solution to this is the "Centrifugal Force" tip below.

2) The vent grooves to one or more chambers may be blocked by adhesive. The adhesive from the tears away seal or the name plate sticker may have blocked up a vent groove. If air can't get into the cartridge, the ink will not flow. The solution to this is a straight pin. Use a straight pin to puncture the name plate foil and vent the cartridge. If you run your finger nail across the foil, you will find there is a hole under the foil for each chamber. This is where to stick the pin through the foil. After making the pin holes in each chamber, run a few cleaning cycles to reestablish solid ink in the head.

3) Printer stops printing after a few pages(or many) have printed. *After refilling your cartridge your printer "thinks" the "original" cartridge is empty. Simply unplug the printer and wait a couple of minutes before plugging it in again. This Should "clear" the memory so the printer recognizes your refilled cartridge as "full".

If you still face the problem then you need to replace the cartridge as it is not genuine.
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1 Answer

The chair will turn on with the push button but will not turn off. Have to disconnect controllor. Otherwise runs fine.


rblome You have a bad switch on the joystick. Now its not really the switch but the switch button. Under the button there was a metallic coating that makes contact with the cicuit board switch turning the chair on and off. If that coating gets worn then the switch doesn't wanna act right. Now if you feel creative and don't want to order a new faceplate then you can carefully peel the faceplate off the joystick (just far enough to expose the bottom of the on/off switch, put a small block under the faceplate to keep the bottom exposed) and taking a small piece of foil glue it to the bottom of the on/off switch. after it dries trim the foil to fit the size of the switch bottom and disconnect the joystick cable at the rear of the chair and carefully reinstall the faceplate making sure that you get the switch into its hole in the joystick. You might have to put a small dab of glue to the top of the faceplate that rests on the case to keep it down and in place. (Now I didn't tell you how to do this its our secret) plug the cable back in and try the switch it should work fine but it will be sensitive to turning on/off. Hope this helps

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Fairly new unit with poor battey life


Yes it is possible. This is one way how you can do it:
-First of all, locate the battery and notice the battery number. You must order a battery with this number. -Remove the front screen surround -- just gently prying does the trick. -Undo four T8 screws holding internal works to outside body. -Remove internal works from body. There is a cover/clip for the bottom panel (where the car mount connects) that just falls out once the insides come out -- pay attention to how it fits in, so that it can be replaced on reassembly. -At the base you will see silver foil covering , the foil needs to be peeled back in places, but you should left as much of it on as possible . -Peel back the foil around the speaker, and remove the two T8 screws, being careful not to disconnect the speaker -- it only needs to be moved aside. -Continue peeling back the foil down to the circuit board, but leave the board itself covered. You will need to manipulate, but not remove, the thin metal "cage" that is shown removed and behind the unit. -On the still-covered circuit board there are four T6 screws that need to be removed; one on either edge at the bottom, and one on either side of the car mount in the middle top. -With the foil loosened and the screws removed, manipulate the metal "cage" to expose the two T6 screws securing the black plastic battery holder. Be very careful not to accidentally disconnect any of the wires/cables. -Remove the battery holder, unclip the old battery, replace with new one, and reassemble. -The unit should be able to power up as soon as the new battery is connected, so I tested it a few times as I reassembled, just to be sure I hadn't jostled anything loose as I went along.
Please keep in mind though that replacing the battery will void the warranty.

Sep 25, 2009 | Tomtom GO 720 GPS Receiver

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Replace battery on my om tom go 300


original battery ICR18650-24 sometimes marked Type VF5 or similar. Battery

.
  • Remove the front screen surround -- just gently prying does the trick. (Img 1)
  • Undo four T8 screws holding internal works to outside body. (Img 2)
  • Remove internal works from body. There is a cover/clip for the bottom panel (where the car mount connects) that just falls out once the insides come out -- pay attention to how it fits in, so that it can be replaced on reassembly.
  • At the base you will see silver foil covering (Img 5), the foil needs to be peeled back in places, but I left as much of it on as possible (unlike the images I'm referencing).
  • Peel back the foil around the speaker, and remove the two T8 screws, being careful not to disconnect the speaker -- it only needs to be moved aside. (Img 6)
  • Continue peeling back the foil down to the circuit board, but leave the board itself covered. You will need to manipulate, but not remove, the thin metal "cage" that is shown removed and behind the unit in Img 11.
  • On the still-covered circuit board there are four T6 screws that need to be removed. These screws can be seen in Image 11 -- one on either edge at the bottom, and one on either side of the car mount in the middle top.
  • With the foil loosened and the screws removed, manipulate the metal "cage" to expose the two T6 screws securing the black plastic battery holder (plainly visible in Img 11). Be very careful not to accidentally disconnect any of the wires/cables.
  • Remove the battery holder, unclip the old battery, replace with new one, and reassemble. (Img 16)
  • The unit should be able to power up as soon as the new battery is connected, so I tested it a few times as I reassembled, just to be sure I hadn't jostled anything loose as I went along.

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3 Answers

Panasonic PT-47WX53 G


My TV too got a "bow" at the bottom of the screen. Seem like many suggested replacing this STK chip and also it's $10/each so I went ahead buy 2 to replace the 2 in my TV.

Below is a pic of the inside of my projector TV with the STK-392-110 circled in green and as you can see it is easy to ID due to the HUGE heat sink that it mount on to help dissipate the heat. (sorry for the small size since Fixya limit the file size to 150KB)

222a5ee.jpg

I unplugged the TV for more then 3 days and that seem to discharged most of the components.

So here are the steps I take to do the fixing.
1) Before I even order the chip I open it up to verify the part number and it was STK-392-110. Did many research try to find as much as I could about this chip and make sure I order the correct one... so I made the order. While waiting for the product, the TV had been unplug ever since.

2) Well, in order to even get to the inside I need to dismount the back panel. So it had stayed open ever since, of cause out of reach of children.

3) The components arrived and I prepared:
- soldering iron
- solder
- heat sink compound (used mainly to fill in a good gap for CPU heatsink inside computer)
- and solder sucker (the sucker later I found to be useless).
- Flashlights
- Screw driver
- Plier.

O, and my brother offer his help which I found to be very useful. My 2 hands weren't enough to do this work.

4) Removed the 4 screws which I marked with the yellow arrow inside the pic.

5) I didn't want to remove any cable afraid that it might create other problems but had to remove about 3 cables to make it easier to lift and move the board around a little while fixing.

6) Removed 4 screws that mount the chip to it's heat sink using a very short screwdriver. Very little space to work with.

7) It was extremely hard to remove the old chip with the board still cabled to the TV. Many times I was tempted to disconnect all the cables. What prevent me from doing so was I couldn't think of a good way to document all the cables that I disconnect and there are just too many (IMO). I did take many pics just in case.
Anyway, what I did might not be the best way but it worked. I tip the chip back and forth to weaken the pins to a point that it broke. It took forever but it did work. After the chip broke off that I can desolder and remove each pin with the plier. Again with the little space to work with that made me want to remove it from the TV. The pins holes were still very messy and full of solder. My brother came up with a way to clean the hole using stripped wires. When the stranded strip wires touch the liquid solder, it help suck the solder out of the hole. I'm sure there are better ways to clean the holes.

8) We had a little hard time putting the new chip in b/c a few pins bended a little and not align with the holes on board. And when added the compound to the chip, it made it even harder since now the chip need to stay away from the heat sink or else it'll stick to the heatsink. Finally we got the new chip in the holes on the PCB with the compound and all, so it just a matter of screwing the chip onto this heat sink.
9) Turn on TV and pic is 99% perfect again. Why not 100% U might ask.. b/c I saw a tiny out of align colors on the left of the screen. Not very noticeable but I can see it when I pay close attention.

Cost for the two chips were $20 included shipping. Hey, it's a lot cheaper then buy new TV and only 2 chips trashed instead of the entire TV. Anyway, I think I knew which chip went bad. Because one chip had hardly any of the compound. This compound help the transfer of heat to the heat sink.

Hope this help someone.

Sep 28, 2007 | Panasonic PT-53TW53 53" Rear Projection...

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