Re: TOSHIBA 32L1400U is dead



I checked the two regulators U11 and U14.

U11 is an adjustable regulator G1117.

R1=249ohm , R2=110ohm so Vout=1.802V

I measured:

PIN1=0.55V
PIN2=1.79V
PIN3=4.99V

error% (to 1.8V)= 0.55%
Vout-Vadj=1.24V

U14 is a fixed regulator: 1117-3

It does not have resistors, I measured:

PIN1=0V
PIN2=3.26V
PIN3=4.99V

error% (to 3.3) = 1.21%

Regulators to me are OK.



...

Hi guys.

I would like to fix my LCD TV with LED backlight which is completely died, it doesn't turn on and there is no standby light.

I did some tests, and I suspect it is the main board.

I have first checked the Power Supply Board, the fuse is OK, and I think I get correct voltages in the output.

With the main board not connected, I get 0V in the output.

With the main board connected, I get the following voltages in the output:

DIM 3.2V
5V1 5.2V
BLON 0.00V
PWON 3.3V
ACD 3.2V...

Re: New Members - please post your introductions here

Hi all. I am Dioner from Venezuela. Student of Electrical Engineering, came here hoping to get some help so I can fix my dead TOSHIBA led TV