Samsung Schematics for BN41-02156A

[Tdiamarelo]

Hello folks, after 2 years of parenting its time to go back to repairs.
I have a Samsung UE48H6200AW whit BN41-02156A Motherboard and i have the service manual for this device, but no schematics.

I have a 5V rail issue, only delivers 1.6V and i need the schematics for this motherboard. Searched the usual places and got no result.
Does any of you happens to have one or could help me figure this one?

I think my buck regulator has gone bad (IC204 - Z3015PI), i get 3V on the ACC pin that only has a capacitor to ground.
I compared to the second 5V rail (stand-by) whit the same regulator and at the ACC pin I get 0V All the other voltages are the same except for the output that should be 5V.
Maybe i swap them over to see it behavior changes and order a new one.

Thanks
Greetings

[kasfamily]

Re: Samsung Schematics for BN41-02156A

A1.5v_ddr_pw (ic204)
a3.3v_pw(ic202)
a5v_pw(ic206)
b5v_dc_pw(ic201)
b1.1v_core_pw(ic304)
b1.1v_cpu_pw(ic305)
b3.3v_pw(ic 208)

[Tdiamarelo]

Re: Samsung Schematics for BN41-02156A

Thanks for the reply, In the service manual ic204 is referred as 5v... Are you sure about the 1.5v? Was just about to replace the ic204... In this case i wait for confirmation!

My issue here is the set starts normally but i have no sound and no picture. Back light ok when disconnecting MB cable. T-con ok, all leds are one. Something is not starting up but no error code is given.
You have any idea?

[lotas]

Re: Samsung Schematics for BN41-02156A

Bn41-02156a

[Tdiamarelo]

Re: Samsung Schematics for BN41-02156A

Thanks a lot, I'm just putting the kids to sleep and then I will measure all the voltages and post back...

[Tdiamarelo]

Re: Samsung Schematics for BN41-02156A

Ok, so all the voltages are correct. Except for the voltage from IC304 like kasfamily said. Instead of 1.1v I have 3.3v. What could cause this no picture and sound issue when all the supplies are present? I found that my USB ports have no power. Is this related maybe?

[altanok]

What was the solution? How does this story ended?