Re: Samsung BN44-00445A failed



Thank you for your reply. Yes and no... With everything connected Vs comes up to 218v and shuts down. Va only comes up to 5v.

The set will power cycle like this 5 or 6 times and then go into standby with the red light blinking twice (fast).

If I disconnect the X-Sus from the Y-Sus board then the power cycling stops but the Vs rises to 218v and back down again immediately....

Re: Samsung BN44-00445A failed

I am currently trying to repair one of these power supply pcbs in a Samsung PS59D550C1KXXU.

The set came to me dead with fuse F801S blown and QP802/QP804 shorted.

I have replaced the fuse like for like and the transistors 6R190C6 with 20N60C3.

I now have life in the set but it will not switch on. I can hear a relay click and an ever so slight sizzle from the power supply. My PFC voltage is now 387.8v.

If I disconnect all other boards from the power supply and force it on I get the 15v output...

Re: Panasonic LSJB1260-1 Power Board Fault?

Have you checked Q406 for a short circuit? I have had a few sets recently with this power supply giving trouble.