Re: Samsung LN32B530P7F PSU issue

When I ask you to check voltage @ CM881 to confirm the problem is not on the cold side (No standby 5.3V) .

You must have some kind of voltage for three IC to run. CM804 must have slightly higher voltage compares to CM808; NOT 0.6V like you said .

Re: Samsung LN32B530P7F PSU issue

Go back to hot side, reread post #24, #25 and #26.

Re: Samsung LN32B530P7F PSU issue

Edit:
It bothers me when you have .6 volt at CM804 . Therefore no voltage goes thru QB801, to UP801S pin 8 and UB802 pin8

Re: Samsung LN32B530P7F PSU issue

Under normal condition, power cord plug in, power off :
16Volts at CM876/ CM881, no 13 volts , no 5 volts at CNM802
5volts at CM852, 5volts standby at CNM802 pin 3.

You once wrote no 5volts standby at CNM802 pin 3, but do you have 16Volts at CM876/ CM881 ? if not go back to hot side.

Did you check RM869 .3 ohm
It bothers me when you have .6 volt at CM804 . Therefore no voltage goes thru QB801, to UP801S pin 8

Re: Samsung LN32B530P7F PSU issue

B4ndit,

I just got home and sorry to hear your problem has not changed. Review your testing conditions; I feel little strange.

For now:
First make sure your meter is good ( not intermittent) by testing something with known values. After that, neg meter lead, hook to neg of CP815 for hot side, ( Neg meter lead, hook to neg of CM867 for cold side). With your PSU diagram, you should have high voltage at CP815 or fuse FM802S then at UM801S pin 1 . ( If no high voltage, check fuse FS901A and BD801S.) I assume you...

Re: Samsung LN32B530P7F PSU issue

Hi everyone,

I also have on/off problem with Samsung LN32B530P7F; but it has nothing to do with PSU. It is not the CAP's either but in the function control board on the right side. Problem solved.

When I read B4ndit problem, I believe it in the hot side of PSU. Did you finally fix that ? May I help ?