Re: Samsung UN55H6203 - Power Supply BN44-00774A
M1+ is the positive supply for the led string, M5- is the return of the led string, M1- & M2+ are connected together, same goes for M2- & M3+ etc. it is basically one string between M1+ & M5- The reason the voltage is around +300 volts is that this is the boosted led voltage, but since the led string is likely open, the led boost circuit shuts down leaving the base +160v on M1+.
There are 5 seperate led strings but they are all in series, string 1 is connected to M1+ and M1-, string 2 between M2+ & M2-, etc.
M1+ is the positive supply for the led string, M5- is the return of the led string, M1- & M2+ are connected together, same goes for M2- & M3+ etc. it is basically one string between M1+ & M5- The reason the voltage is around +300 volts is that this is the boosted led voltage, but since the led string is likely open, the led boost circuit shuts down leaving the base +160v on M1+.
There are 5 seperate led strings but they are all in series, string 1 is connected to M1+ and M1-, string 2 between M2+ & M2-, etc.
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