I replaced ICucc2818d and run 10 minutes then PFC stopped, I check Ucc2818D still not short; Could you please point me how to check why PFC not run sir?
Hi elder2580! As first thing check all Mosfet! If the 20a fuse is broken, it is easy that mosfet, or the rectifier bridges or the hv electolytic capacitors are broken! If R80 burn this means that TNY280 is broken and you will have to test too M51957B, R86, R86, R88, R89 and R90. Value of R80 is 1.2ohm 2W. Follow the other lnstructions of my video on the compnents on RSP3000B and RSP3000C PCB cards.
@@albertostoppelli Hi Sir, on control board I see BJT near Soft start , I check connect C pin of that BJT and B pin of the BJT burned in your repairing but not connect, I have question is them connected?
thanks alot its usefull
Really nice documentation. A little thing, nice would be to know what the failure is and what the cause for failure was.
Good to see about
all mosfet are ok, problem on RSP-3000B-R5; resiston R912 burn; IC Ucc2818 I measure from Vcc to ground resiston only 5ohm
It's shorted, replace it
Before starting check that all power mosfets are good
I replaced ICucc2818d and run 10 minutes then PFC stopped, I check Ucc2818D still not short; Could you please point me how to check why PFC not run sir?
R80 , o valor que está aqui é 620k que ao ligar a fonte ele aquece chegando a dessoldar da placa
Hi elder2580!
As first thing check all Mosfet! If the 20a fuse is broken, it is easy that mosfet, or the rectifier bridges or the hv electolytic capacitors are broken!
If R80 burn this means that TNY280 is broken and you will have to test too M51957B, R86, R86, R88, R89 and R90.
Value of R80 is 1.2ohm 2W.
Follow the other lnstructions of my video on the compnents on RSP3000B and RSP3000C PCB cards.
Hi IK8UIF, I also have this problem,
TNY279 burn then I check UCC2818 measure pin VCC to Ground only 5ohm; I will replace them
Tny279? Mine mounts tny280. Check also all components indicated in my video. I think also m51957b bourned.
I hope you resolve!
@@albertostoppelli yes, this power supply has R5 ( module PFC); and control board is RSP-3000C-R12 ; I canot find UCC2818AD, it is only UCC2818D here;
ua-cam.com/users/shortsywetHSCMfF4
it's in the small board. cut the silicon drop to remove it@@quangtrungvtv
@@albertostoppelli Hi Sir, on control board I see BJT near Soft start , I check connect C pin of that BJT and B pin of the BJT burned in your repairing but not connect, I have question is them connected?