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Can anybody please tell me about the Signals / Voltages (levels) coming in / going out through 14 pin dip connector SNM803 on P. Supply Board BN44-00605A of my Samsung 32" LED TV Model CY-HF320BGLV1V. 5V is present at pin12. many other voltages are present across electrolytic capacitors on the P/S. board. After studying the circuit I feel that some voltage at pin 14 may trigger the hole circuit and all the supplies will appear at their respective pins of above connector. Am I right please. If it is so then please tell me where from this voltage will come . Please also let me know what is BLU_on/off at pin6 Thanks
@mathur_65yrs looks like the signals will be coming from the main board. you need to measure the pins on connector CNM803: Pin no 2 4.70v 4 0v 6 4.70v 8 0v 10 0v 12 5.24v 14 3.12v
1 12.86v 3 12.86v 5 12.86v 7 12.86v 9 0v 11 5.24v 13 5.24v All voltages are VDC. If you disconnect the cable between the power supply and the main board and then you apply the power to the TV and the backlights come on and stay on then your power supply/LED driver board and the LEDs are OK. Here is the schematic for those that do not have it BN44-0605A your TV’s issue seem to be related to a bad main board. There are no schematics available for it that I know off.
