tvc sharp LC-32LE144E main 32LE244_main BD Rev: 1.02 only red led stand-by

Question

hello everyone, in this tv the red led remains always on steady, and it does not light up either from the on-off button or from the remote control, the 5v are present, can it be a flash memory problem or other problems?
thanks

VINZA · Answer

Hello, check the output voltages from U2 and U3, they must be exact, otherwise replace the corresponding integrated. Many defects of these frames are to be attributed to these 2 ic.
Here the wiring diagram with the exact voltages.

misterbinn · Answer

hello, in fact I was thinking I give U2 and U3 the first one delivers 2.2v and the second 0v, I see if I can recover them from some card, I replace them and I update you thanks

bazi1962 · Answer

Of course it can.

misterbinn · Answer

in fact I also tried to reprogram the flash several times even replacing the chip but without results, then measuring the voltages I realized that U2 delivers 2.2v instead of 1.3v and U3 delivers 0v instead of 1.8v so first you need to restore the two voltages replacing both U2 and U3

VINZA · Answer

Before replacing the integrated circuits, check that there is no short circuit downstream of them.

misterbinn · Answer

after removing U2 and U3 I checked the presence of any output short circuits but fortunately everything is normal, as soon as available I will replace them and update you

misterbinn · Answer

hi, I replaced U2 and U3, now the voltages 1.3v and 1.8v are present, the TV only turns on that sometimes it freezes with a loud audio noise and noise on the image, it no longer responds to commands, in this phase it does not the 1.8v are present because the enable voltage is missing by disconnecting the mains plug and reattaching it it turns on and works normally, it has been on for several hours now it is ok, I think of a problem on the processor, possibly the main is to be replaced, let's see how it goes

VINZA · Answer

Hi, try to update the software.

misterbinn · Answer

Can't find a file to flash via USB?

misterbinn · Answer

update performed, is this enough or is it better to flash the eprom with the 8 mb bin file?

VINZA · Answer

It's enough.

misterbinn · Answer

I updated from the sharp site now okay, thanks for the advice

SimoneFerri · Answer

a me è capitato ic u4 sulla main board in corto si surriscaldava da bruciar

flashh · Answer

I'll connect to the topic. The effect is that only the LED lights up and there is no reaction to ON. I bought W25Q64FVSIG and I've been loading various loads but with no effect. Voltage OK. Are there any other faults of this type in this model? Surprisingly, there was no indication that the original memory was damaged because I read it and saved the batch without any problems.
Maybe you have some ideas
Regards

tvc sharp LC-32LE144E main 32LE244_main BD Rev: 1.02 only red led stand-by

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Post #8

Post #9

Post #10

Post #11

Post #12

Post #13

Post #14

Post #15

Post #16

Post #17

Topic summary