Samsung UN60ES6500FXZA Power Supply Issue

[Cookybaby]

Re: Samsung UN60ES6500FXZA Power Supply Issue

The high voltage is supplied from CP814s, through FP803S through JP847 to icm801 pin1, the ic then switches the primary via pin10. The primary gets switched at about 100khz so you won't measure any real DC voltage on the primary. The ic also requires VCC on pin7, check that there is about 15vdc on CM812

Ok, I got 391v on pin 1 of IC FSFR2100XSL. On pin 7 of the FSFR2100XSL I got 9.7v. And 9.7v across CM812. Without the IC installed.

[Cookybaby]

Re: Samsung UN60ES6500FXZA Power Supply Issue

After I re-installed the IC I get:
PIN #1 - 391v
PIN #7 - .23v
PIN #10 - .23v

[R_J]

Re: Samsung UN60ES6500FXZA Power Supply Issue

9,7 volts is low so check the voltage across CP811, it should be around 15v
The vcc for ICM801 pin 7 is supplied through a transistor QM852 collector, The Multi_Vcc is supplied to the emitter from CP811
The base of QM852 is biased by 2 resistors and a 431 regulator ic (ICM802)
When the pfc voltage is around 385vdc, ICM802 should be biased on and the base of QM852 should be turned on so QM852 can supply the 15v to the icm801 There may be a low value resistor (27Ω) between icm801 pin 7 and QM852 collector
It may also be that CP811, CM812, CS805 need replacing

[Cookybaby]

Re: Samsung UN60ES6500FXZA Power Supply Issue

9,7 volts is low so check the voltage across CP811, it should be around 15v
The vcc for ICM801 pin 7 is supplied through a transistor QM852 collector, The Multi_Vcc is supplied to the emitter from CP811
The base of QM852 is biased by 2 resistors and a 431 regulator ic (ICM802)
When the pfc voltage is around 385vdc, ICM802 should be biased on and the base of QM852 should be turned on so QM852 can supply the 15v to the icm801 There may be a low value resistor (27Ω) between icm801 pin 7 and QM852 collector
It may also be that CP811, CM812, CS805 need replacing

Ok, I measured across CP811 and got 14.5v. I removed CP811, CM812 and CS805 and checked for a short or open. All three charged up as expected, no shorts or open. I guess I need to buy a good capacitance meter at this point. I am not sure where QM852 is located. I circled it in red in the attached pic. I measured 14.5v on the emitter.

[R_J]

Re: Samsung UN60ES6500FXZA Power Supply Issue

All three charged up as expected

did you charge them at 60khz? Even a cap/esr tester may not check them properly. Just replace them.

I am not sure where QM852 is located. I circled it in red in the attached pic

If you don't know where it is how can you circle it? If you measure 14.5v on the collector, and the collector should be connected to CM812 and then to icm801 pin7

[Cookybaby]

Re: Samsung UN60ES6500FXZA Power Supply Issue

Sorry for the delay, I was called out of town all this week. I will get the Caps ordered and retest. Should report back next week.

[Cookybaby]

Re: Samsung UN60ES6500FXZA Power Supply Issue

Greetings again, I have ordered ICM801, CP811, CM812, CM807 and CS805. I dont know what the values are for the ones I circled in red. I dont have a schematic for this board. I feel like it would be best to replace all these parts. What do you think?

Thanks,
Randy

[Cookybaby]

Re: Samsung UN60ES6500FXZA Power Supply Issue

I replaced all the parts listed above and got the same results, 9.7 volts on ICM801 pin 7. Does anyone know where I can get a schematic for this power supply BN44-00525A? I would like to check all the resistors between icm801 pin 7 and QM852 collector. Thanks for any help!

[dakarpesca]

Re: Samsung UN60ES6500FXZA Power Supply Issue

[lotas]

Re: Samsung UN60ES6500FXZA Power Supply Issue

This topic discusses the BN44-00525A power supply, not the BN44-00205A for which you are posting a link.

[dakarpesca]

Re: Samsung UN60ES6500FXZA Power Supply Issue

This topic discusses the BN44-00525A power supply, not the BN44-00205A for which you are posting a link.

I'm very sorry I was wrong .how can i remove the above link

[Diah]

Re: Samsung UN60ES6500FXZA Power Supply Issue

1. I removed the back panel and the first thing I did was remove the Mainboard connector from the power supply. I plug the TV back in and hear a click and the relay stays in that position. No standby and no blinking and no backlights.

and yours POST #13

it tell me you have issue at LED BL..

[Cookybaby]

Re: Samsung UN60ES6500FXZA Power Supply Issue

Since I could not find a schematic to identify the faulty parts for the BN44-525A, I just ordered an updated PSU board and it worked perfectly. After looking at other schematics around the BN44-525A version, I discovered that the BN44-526A would work. I want to thank everyone for the assistance. This is a great community to be a part of.

[nomoresonys]

Re: Samsung UN60ES6500FXZA Power Supply Issue

Good job, thanks for followup.