Samsung LE32S62BX probably power supply

[budm]

Re: Samsung LE32S62BX probably power supply

Do you mean the reading is on the IC PIN 8 and the ground pin, or you are measuring the pads where the IC is (empty pads with the IC removed)?

[Kabbone]

Re: Samsung LE32S62BX probably power supply

On the pins of the IC, removed from the pads

[Kabbone]

Re: Samsung LE32S62BX probably power supply

So, I replaced ICM801 and QB802 isn't getting hot anymore. VCC is now switching between 0 and 15V. TV is still not working... I'm waiting for ICP801S now.

[tom66]

Re: Samsung LE32S62BX probably power supply

The startup capacitor could also be bad, especially if the hot transistor next to it damaged it.

[Kabbone]

Re: Samsung LE32S62BX probably power supply

Finally all parts arrived, but it's still not working. The code of the power LED is 5 short and 1 long, perhaps someone can interpret this code. I don't really know how to continue on this now.

[tom66]

Re: Samsung LE32S62BX probably power supply

Transistor still hot?
Samsung do not use blink codes, ignore that for now.
All voltages from PSU good or bad?

[Kabbone]

Re: Samsung LE32S62BX probably power supply

Transistor keeps cool now. I will check all voltages later or tomorrow

[Kabbone]

Re: Samsung LE32S62BX probably power supply

The output voltages (12V, 24V,...) are all still bad. Vcc is 15V for about 2-3 sec and then switches to 0V for also 2 sec, it's always an up and down. I can hear a very quiet "click" when it comes up again.

[Kabbone]

Re: Samsung LE32S62BX probably power supply

PC801S and QB851 are switching, but the ON/OFF Signal is switching, has anyone one more suggestion?

[tom66]

Re: Samsung LE32S62BX probably power supply

If the ON/OFF is switching you may have a main board fault, assuming all voltages from the power supply are good.

[Kabbone]

Re: Samsung LE32S62BX probably power supply

Ok, the voltages are bad. For example at TB801S I got at Pin 2 about 380V but nothing at Pin 8-10. How is this affected of Pin 5-6-7?

[Kabbone]

Re: Samsung LE32S62BX probably power supply

I bought a used board now and the TV works again. Does someone need some spare parts? :P