Samsung BN44-00214A Power Supply for LN32A450C1DXZA

[kenmoe]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

I rechecked all the readings and i am getting 3.5v on the pwr on pin for a second or two, then it cuts out for a second or two. Repeating over and over

[kenmoe]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

No change in led when pw button pressed and no startup chime

[budm]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

BTW, PS-ON pin is pin 1 of the CNM802 that goes to the main board, that is the pin we need to verify if we have the PS-ON to turn on the power supply or not. Right now we are trying to see what Voltages you have between the power supply and the main board that is why we need to check CNM802.
CNM801 is for the inverter board which we are not dealing with it at this point.

[budm]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

At this point to make it less confused, you need to report all the Voltages of the connector CNM802 of that power supply board.

[budm]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

I rechecked all the readings and i am getting 3.5v on the pwr on pin for a second or two, then it cuts out for a second or two. Repeating over and over

Are we talking about pin 1 (labeled as 'PS') on the connector CNM802? If that is the case then you have something bad going on in your main board that causes PS-ON to cycle on and off which will male 12v/24V circuit to go on and off, same for the PFC Booster circuit will not be on steadily either..

[kenmoe]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

CNM802
pin 1 constant on and off 3.5v
pin 3 steady 5.2 V

[kenmoe]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

I guess I should mention that one of the last times the tv started up, it turned on by itself when plugged into the wall. I was able to turn it on and back off with the power button at that point. As of right now, the tv will not turn on even when left unplugged overnight like previous

[kenmoe]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

Are we talking about pin 1 (labeled as 'PS') on the connector CNM802? If that is the case then you have something bad going on in your main board that causes PS-ON to cycle on and off which will male 12v/24V circuit to go on and off, same for the PFC Booster circuit will not be on steadily either..

yes correct. But the PS still puts out these low voltages when disconnected from the mainboard, and not getting a signal to turn on.

[budm]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

CNM802
pin 1 constant on and off 3.5v
pin 3 steady 5.2 V

OK, so you main board not sending steady on control signal to make the PFC Booster circuit and the swithed 12V/24/ to be on steadily.
Can we see the pictures of your main board and the pictures of the whole backside of the TV showing all the boards?

[budm]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

BTW, you can also test the power supply board by itself by soldering in the 1K resistor between pin 1 and pin 3 of CNM802, just make sure to disconnect the cable to the main board first.

[kenmoe]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

[budm]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

I guess I should mention that one of the last times the tv started up, it turned on by itself when plugged into the wall. I was able to turn it on and back off with the power button at that point. As of right now, the tv will not turn on even when left unplugged overnight like previous

You do have main board problem, you can try heating the main board for 2~3 minutes then power the TV to see what will happen, you can also try cooling the board with canned air duster using it upside down to get the coolant out.

[kenmoe]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

I will try the resistor and check back with the results

[budm]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

Same problem as yours.
https://www.badcaps.net/forum/showth...ht=LN32A450%2A

[kenmoe]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

I also thought it could be the mainboard until I seen low output voltages when the mainboard was disconnected and no resistor to tell it to turn on

[nomoresonys]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

https://www.ebay.com/itm/Samsung-LN3...4383.l4275.c10
19.66 free shipping.

[kenmoe]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

using a resistor to jump pins 1 and 3 did not result in any other results. I'm still getting the same output voltages

[budm]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

using a resistor to jump pins 1 and 3 did not result in any other results. I'm still getting the same output voltages

OK, so you have a the power supply problem also.
Wit that resistor still in place, you will need to find out if you do have the 380VDC boosted Voltage or not by measuring the DC V between the two legs of the main filter cap.

[kenmoe]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

By main filter cap you mean CP803, then I get 160v when measuring across the two leads of the cap

[nomoresonys]

Re: Samsung BN44-00214A Power Supply for LN32A450C1DXZA

By main filter cap you mean CP803, then I get 160v when measuring across the two leads of the cap

That should be the reading in standby, now power tv on and check, should be around 380, if it is that verifies your PFC is ok.