TCL 40-L141H4-PWG1CG power supply board repair for Thomson 49UV6206W

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Hello,
My TV's power board has blown and I have a mosfet, some diodes and resistors to change.

The problem is that I cannot identify one of the components (U401, 6 pins chip).
See photo with the marking on the component.
I have downloaded the diagram of this card but the reference is not indicated.

Can someone tell me what is the reference of this component U401?

Thank you.

[lotas]

Re: TCL 40-L141H4-PWG1CG power supply board repair for Thomson 49UV6206W

t37 - LD5537

[lotas]

Re: TCL 40-L141H4-PWG1CG power supply board repair for Thomson 49UV6206W

Power Supply

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Re: TCL 40-L141H4-PWG1CG power supply board repair for Thomson 49UV6206W

Thank you lotas, once again you are great.
I had looked for codes starting with Qt but not with 37.

[lotas]

Re: TCL 40-L141H4-PWG1CG power supply board repair for Thomson 49UV6206W

Thank you lotas, once again you are great.
I had looked for codes starting with Qt but not with 37.

But it also happens
p37 is already LD7537.

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Re: TCL 40-L141H4-PWG1CG power supply board repair for Thomson 49UV6206W

Thank you for the diagram but I have other questions while reading it.
I have to change the R413 2W resistor but mine is 36.8 ohm (see photo) and not 0.36 ohm as shown in the diagram.
Same difference for R402, mine is it seemed to me 300 ohm (see photo) and not 390 ohm as on the diagram.
In the end I do not know by which values are the good ones for these 2 resistors.
I also have the QW2 mosfet which is blown (short circuit), it is reference CS7N65F and not AP2762.

[lotas]

Re: TCL 40-L141H4-PWG1CG power supply board repair for Thomson 49UV6206W

According to the photo, 0.36 Om is correct (the silvery stripe is a multiplier of x0.01).

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Re: TCL 40-L141H4-PWG1CG power supply board repair for Thomson 49UV6206W

OK, I thought the multiplier was the 4th stripe

[lotas]

Re: TCL 40-L141H4-PWG1CG power supply board repair for Thomson 49UV6206W

The fourth band (golden) is the tolerance of ± 5%.
This resistor (R413) acts as a current sensor and their resistance is always less than Om.

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Re: TCL 40-L141H4-PWG1CG power supply board repair for Thomson 49UV6206W

I let myself be deceived by the site https://kiloohm.info by selecting caculator for 5 color band resistor.