Re: Samsung 24" power supply BN44-00195A

Update: The MC33067 blew again. After reconnecting to mains without series load it just died.

Any idea of why? With a series load of about 200W incandescent light and it was working fine and without it it died almost instantly.
PFC is still ok if I remove the dead MC33067 thats clamping the M_Vcc supply to ground (only 13 ohms between vcc and gnd pin).

To bad.. just got the IC from ebay France all the way to Sweden..

Re: Samsung 24" power supply BN44-00195A

Hi,

First, thank you very much for posting the schematic. It helped alot!!


I just repaired one of these boards in my 24" samsung screen.
After I moved to a new house a few months ago the screen just blew up as soon as I reconnected it to mains again.


It also blew a 5AT ceramic fuse,
the 2.2nF cap after the PFC was toast (CM810).
RM801, the 0.22R was open.
Leaking zener, the 15V ZDB805

ICP801 (PFC ic) was dead,
so was the MC33067 (5.1V...