repairing washing machine board Samsung Q1235V

[Daxxin]

Display pop up for some seconds then goes off maybe protection thing the critical component IC DIP8 TNY267P
across pin1 and 8 with unsoldered C38 i get 80ohm is that normal for this IC?

[Arjunan M R]

Here is the block diagram of tny267P

[Arjunan M R]

https://www.power.com/sites/default/files/product-docs/tny263_268.pdf

[Arjunan M R]

Pin 1 and 8 should not be shorted.You have to replace the ic.

[Arjunan M R]

here is the pin names

[Arjunan M R]

I think the zener might be shorted in the ic it is right across 1 and 8.

Replace the ic

[Arjunan M R]

Display pop up for some seconds then goes off maybe protection thing the critical component IC DIP8 TNY267P
across pin1 and 8 with unsoldered C38 i get 80ohm is that normal for this IC?

No its not normal look at the block diagram

[Arjunan M R]

Or the mosfets?

[Arjunan M R]

I think TNY2xx IC are like rifa caps.Some time ago tny277p in the psu of my computer blowed up with a loud sound.I replaced it and the psu was fine.

[Arjunan M R]

In the datasheet it says not recommended for new designs

[Arjunan M R]

Display pop up for some seconds then goes off maybe protection thing the critical component IC DIP8 TNY267P
across pin1 and 8 with unsoldered C38 i get 80ohm is that normal for this IC?

Yeah it has protection.

[Arjunan M R]

Bypass pin(pin1) is the connection point for 100nF external bypass capacitor for internal 5.8V supply.It must not be shorted. It's just for that cap.

[Daxxin]

C36 is a levelling o pump ?

[Arjunan M R]

C36 is a levelling o pump ?

If you mean C36 is levelling the ic, yes.

[Arjunan M R]

C36 is a levelling o pump ?

Didnt understand what you mean by o pump

[Arjunan M R]

You need to replace the ic to fix it.