SAMSUNG PS60E6500 Power Supply BN44-00513A defect and burned

[maces]

Hello everyone,

I have a problem with the power supply of my Samsung PS60E6500.
The LED of the TV is blinking and it doesn't turn on.

After checking the power supply I noticed that the PCB board is burned at QP804 (K13A60D), the MOSFET is shorted.

RP812 is also defect. Unfortunately the resistor is burned so I cannot read the value. Also QP805 and QP806 are shorted. Does anybody have a schematic diagram or does anybody know the type of the parts?

[R_J]

Re: SAMSUNG PS60E6500 Power Supply BN44-00513A defect and burned

There is likely more wrong then those parts, the ic is likely damaged as well.
Check the components in the circuit for QP802, they should be similar values. IE: QP807, QP808, RP810
BN44-00329A schematic may be similar

[maces]

Re: SAMSUNG PS60E6500 Power Supply BN44-00513A defect and burned

I changed the shorted and damaged parts I could identify with the multimeter:
QP804 --> K13A60D
QP805 --> MMBT2222A
QP806 --> MMBT2907A
RP807 --> 22 Ohm
RP808 --> 3.3 Ohm
RP812 --> 10 kOhm

This tread helped me to identify the tranisistors:
https://www.badcaps.net/forum/showthread.php?t=116816

When I applied the voltage, it spakred briefly and the new parts are damaged again.
Is there a possibility to test ICP801? What's the type of this part?

[nomoresonys]

Re: SAMSUNG PS60E6500 Power Supply BN44-00513A defect and burned

diy simple tester: https://www.youtube.com/watch?v=vXlWSKU_lPI

[maces]

Re: SAMSUNG PS60E6500 Power Supply BN44-00513A defect and burned

Thank you for the link.
This tester is designed to identify excessive current consumption of the entire system.
In my case, the curren consumption of the whole system is OK. It is only a small part of the schematic that burns. The internal fuse does not trip.

I just recognized that the link above is not working.
Please try this one: https://www.badcaps.net/forum/showthread.php?p=986844

[nomoresonys]

Re: SAMSUNG PS60E6500 Power Supply BN44-00513A defect and burned

If you pay attention, a dim bulb tester is used to determine if a short is present or still present and it prevents blowing up components, comprende?

[thommyX]

Re: SAMSUNG PS60E6500 Power Supply BN44-00513A defect and burned

Exchange the parts again.
QP804 -> K13A60D
QP805 -> MMBT222A
QP806 -> MMBT2907A
RP807 -> 22 Ohm
RP808 -> 3.3 Ohm
RP812 -> 10 KOHM

Control the NTC, DP809, DP808, QS802, QS804. Definitely renew icp801. Control QP802 with the transistors and resistors.

LG Thomas

Tausch die Teile erneut.
QP804 --> K13A60D
QP805 --> MMBT2222A
QP806 --> MMBT2907A
RP807 --> 22 Ohm
RP808 --> 3.3 Ohm
RP812 --> 10 kOhm

Kontrollier den NTC, DP809,DP808,QS802,QS804. ICP801 definitiv erneuern.

LG Thomas

[maces]

Re: SAMSUNG PS60E6500 Power Supply BN44-00513A defect and burned

Hello together,

I changed the burned parts again and ICP 801 (delivery time for this part was very long...)
Then the TV started. I was very happy about but then, a buzzing noise came and at the same time the TV shut down. So the TV worked for maximum 3 minutes.

Now, the same parts are burned again:
QP804 --> K13A60D
QP805 --> MMBT2222A
QP806 --> MMBT2907A
RP807 --> 22 Ohm
RP808 --> 3.3 Ohm
RP812 --> 10 kOhm

I checked before the NTC, DP809, DP808, QS802, QS804 and QP802 with the transistors and resistors and I couldn't find an error.

[maces]

Re: SAMSUNG PS60E6500 Power Supply BN44-00513A defect and burned

Today I changed all the damaged parts again. Now the TV doesn't start at all.
The red standby LED is blinking and I can measure only the 5V standby voltage.