Sharp LC-40FG2241KF dead

[Judderman69]

Hello and greetings from the United Kingdom, I'm looking for some help in repairing my grand daughters 'dead' Sharp LC-40FG2241KF smart tv. I have replaced the following damaged parts on the main PCB (TP.MS6486.PB711) :- fuse FB1, switch mode chip UB101, MOSFET QB101,capacitor CB116, resistor RB106, RB148 and a track from UB101 pin 6 to QB102.

Unfortunately resistors RB105 and RB108 are also open circuit and because of their size (0201) I don't know their value. Could some kind soul please tell me or point me toward a schematic with a parts list, a very big ask but for this I would very very grateful and be forever in your debt!

Thanks in anticipation

[yokoono]

Re: Sharp LC-40FG2241KF dead

https://www.electronica-pt.com/esque...p9495dj-71790/

[Judderman69]

Re: Sharp LC-40FG2241KF dead

Thanks yokoono for your speedy reply but no cigar this time. The circuit described in your link is way off, I think there are many revisions and variations of this PCB. There are several white labels attached to the board and this is the one that makes most sense.

Model:-40FG5241KF
TV:- 20180510-093411
P/O:- PO41Z-2-CVTE

The smp chip is an LD7537R and the resistors supply a type 2A transistor emitter follower used I guess to make MOSFET switch promptly.

Sorry my bad, all the above components are on the primary of the switching transformer.

[R_J]

Re: Sharp LC-40FG2241KF dead

All I found so far is this, It uses the same LD7537 ic so maybe it will help.

[lotas]

Re: Sharp LC-40FG2241KF dead

There is a diagram, but without the ratings of the components.

[MarkC1970]

Re: Sharp LC-40FG2241KF dead

Hi Judderman69, did you ever find a link to the correct MS6486.PB711 schematic? I have one with a failed boost converter for the LED's that is causing me a headache. Thanks.

[Judderman69]

Re: Sharp LC-40FG2241KF dead

Hi MarkC1970,

did you ever find a link to the correct MS6486.PB711 schematic?

I haven't found a schematic with a component list, and probably never will as this depth of info may break manufacturer non disclosure. At the moment I'm awaiting more components from China. I've also seen the complete board for sale from https://www.tvparts.co.uk/index.php?...lc-40fg2241%20 I may buy it just to get the info, good luck repairing yours. Cheers

[MarkC1970]

Re: Sharp LC-40FG2241KF dead

Hi MarkC1970,


I haven't found a schematic with a component list, and probably never will as this depth of info may break manufacturer non disclosure. At the moment I'm awaiting more components from China. I've also seen the complete board for sale from https://www.tvparts.co.uk/index.php?...lc-40fg2241%20 I may buy it just to get the info, good luck repairing yours. Cheers

To solve my problem I have purchased a different board for £8 with the same boost coil just to pinch it. The PSU is working fine on my board and if you post pics of the components you need I will happily tell you what value they are.

[MarkC1970]

Re: Sharp LC-40FG2241KF dead

Sorry, I just scrolled up and saw you want 105 and 108. I will check them later.

[johnny20082008]

hi,
soft usb or nand backup
SHARP LC-40FG2241KF

LY.22P10G001

TP.MS6486.PB711
pls