Schematics request for LSJB1260-1 power supply board for a Panasonic TH-50PX80U

ngth82

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Join Date: Jul 2015

Posts: 541

Country: USA
#1

Schematics request for LSJB1260-1 power supply board for a Panasonic TH-50PX80U

08-01-2017, 11:34 PM

Hello all - I'm looking for a set of schematics for for a LSJB1260-1 power supply board found in a Panasonic TH-50PX80U. .

I searched for this particular board part number, and for the TV itself, but none of the results matched the power board that i have in hand. (See pic please). Looks like there are a couple of others that are also having problems finding the schematic.

The board has no power, and the input fuses are blown. The FET (Q406) is shorted between the source and drain. I have parts on order, but I'd like to be able to check the rest of the board out before i power it up. I did find a Panasonic Tech note (TT-08-27) that shows the exact problem I see (slightly different power board, but the board is similar enough)

Any leads on the schematic?

Thank you,
Thomas
Attached Files

-Thomas
I'm a hardware engineer focused on networking equipment for my day job. I void warranties and fix consumer electronics for fun.
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tom66

EVs Rule

Join Date: Apr 2011

Posts: 32560

Country: UK
#2

08-02-2017, 01:18 AM

Re: Schematics request for LSJB1260-1 power supply board for a Panasonic TH-50PX80U

Check link in my signature - I believe it's in the service manual for this model.
Common fault with these is also the PFC diode is bad which causes that FET you mention to fail. Check that as well.

Last edited by tom66; 08-02-2017, 01:23 AM.

Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Schematics request for LSJB1260-1 power supply board for a Panasonic TH-50PX80U

Schematics request for LSJB1260-1 power supply board for a Panasonic TH-50PX80U

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