samsung bn44-00115a power-inverter

[fedebag]

Hi guys, I've a problem with this TV. I repair switching exploded but it switch off after 10-15 minutes, probably because some components get hot for wrong value.

I'm looking for correct value of ZD 101, ZD 104, ZD 105. I've got schematic diagram but I can't undestand correct value of these zener.
Thanks in advance!

[Andrew F. Ali]

Re: samsung bn44-00115a power-inverter

Maybe if you share the the schematic diagram you would get a quicker response. Thanks.

[tvtimmy]

Re: samsung bn44-00115a power-inverter

ZD101 is 7.5 v
ZD104/105 are 24v

[fedebag]

Re: samsung bn44-00115a power-inverter

Thanks a lot! After I connect correct zener, TV is turns on about 30 minutes, after that it turns off for few minutes and repeat this sequence each half an hour.

I changed IC101 because it was exploded and PC101 because it was always warm.

I tried to change D102 and D103 without success.

Could anybody help me, please?
Thanks in advance

[Andrew F. Ali]

Re: samsung bn44-00115a power-inverter

Could you share the schematic you say you have for this PSU?

[fedebag]

Re: samsung bn44-00115a power-inverter

Hi guys, in red circle components I found fault. But TV switch off about after 20 minutes

[tvtimmy]

Re: samsung bn44-00115a power-inverter

Touch up as many solder joints as you can. Sounds like a heat expansion fault.