OK. With main board disconnected, pins 10 & 14 = 5.1 V, all other pins = 0 V
Now with the mainboard still disconnected if you jumper the 5.1V standby to Power TV using a 1K resistor do the other supplies come up.
By the way what voltage do you now have at AC_Detect?
Now with the mainboard still disconnected if you jumper the 5.1V standby to Power TV using a 1K resistor do the other supplies come up.
By the way what voltage do you now have at AC_Detect?
Main board still disconnected, just soldered a 1k resistor across pins 14 & 12 (5.1 v and power_tv). Only change is to pin 12 (power TV), which = 4.9 V. AC_Detect is still 0 V.
With main board connected, shouldn't pin 12 power_tv normally be at 0 V? When you push the power button, then pin 12 should change to some voltage level?
Well, shopjimy does not have any pictures of this power supply board PK101W01001 for me to trace out the circuit, so without super clear pictures of the top and the bottom side of the board I cannot really help you much.
Right now you have STBY Volage and the PS-ON signal.
See the middle Mosfet? It has a metal tab, unlike the other 2 which is plastic. I didn't have any TO-220 mica insulators so made one from insulator from a hair dryer, put Silicon paste on it and screwed it down with the metal screw that was removed. I wasn't thinking and got screwed by that screw ha ha which in effect grounded the drain of that Mosfet! I took the screw out and the TV powered up and I have backlights, sound and picture!. Kudos to the designers which prevented the TV from powering up and smoking parts by detecting the short circuit in the backlight power section. Now I have to find a nylon screw.
Well, that is good, too bad we were missing the details on what you have done to the mounting of the MOSFET in the beginning, the old device was isolated tab but the replacement is not.
Well, that is good, too bad we were missing the details on what you have done to the mounting of the MOSFET in the beginning, the old device was isolated tab but the replacement is not.
I couldn't find the original Mosfet P0920ATF on Ebay and had to substitute a TO-220 Mosfet with a higher rating that was available on Ebay. I have never seen an isolated tab form factor like that before. What is it called? Where is the best place to buy these parts?
P0920ATF is 200 V 9 A, the replacement is an IRF640 200 V 18 A. I don't think I can find a Nylon screw tomorrow easily and want to put the set back together. I am goind to use a zip tie, let it run a bit and if it does not get too warm, just leave it at that. What do you think?
Please help me to get the IC Number of the IC chip present on the Power Supply board backside of the TV Model TOSHIBA 32PU201E1.
The IC chip number got erased as the IC was damaged due to high voltage. In order to replace the IC the IC number is required.Please some one help me with the IC number if you have TOSHIBA 32PU201E1 TV Model with you.
Thanks in advance !!
Last edited by prabhakar; 08-01-2016, 11:42 AM.
Reason: spelling mistake
Please help me to get the IC Number of the IC chip present on the Power Supply board backside of the TV Model TOSHIBA 32PU201E1.
The IC chip number got erased as the IC was damaged due to high voltage. In order to replace the IC the IC number is required.Please some one help me with the IC number if you have TOSHIBA 32PU201E1 TV Model with you.
Thanks in advance !!
Pictures of the board? The P/N and the version of YOUR board? The designator of the IC in question?
Can someone help me find a schematic to the PS
board below? Even though the set is fixed and working, I'd like to know what those parts that blew do and what the circuit looks like.
Hi 2many. I have the same TV with the same problem. I can see the picture if I shine a flashlight on to the screen.
My question is, how did you get to the boards? I took out the marked screws and have started to get the bezel off, but it seems to be hung up at the bottom of the screen. Anything to look for or any tricks? Do I lay it on its back and work on the bezel first?
Thanks,
Been a while since I started this thread looking for help. My Toshiba is still working well after I fixed it and turned down the brightness.
As I recall, after removing the screws, the bezel has to be pryed off. It is held on with clips and there are many. Once you get one clip pryed loose, stick a piece of cardboard in there so it cannot pop back in. Look on youtube on how to take apart any LED TV. They all snap together the same way I believe.
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