Author Topic: Samsung LE40B550A5 near disaster (Read 7075 times)

sinclairtv · « **on:** February 04, 2011,13:41:34 »

A customer phoned to say her 40" Sammy was going off so mentally rubbing my hands I quoted her for the repair. Turns out it wasnt the usual type of PSU but a PSU/inverter combi. I thought that the mains input socket was faulty so I removed the PSU. BIG MISTAKE as all the tubes then came out of the inverter board.
I had to replace the panel, turn set on to back and completely dismantle screen to pop the tubes back into the sockets. I really dont know how you are supposed to remove the PSU without the inverter as they are attached.

Mulja tv repair portal · « **on:** February 04, 2011,13:41:34 »

daz · « **Reply #1 on:** February 04, 2011,14:12:02 »

thank for the warning

how about a pic of the inards if youve still got the set,may help my memory as im sure to forget the warning and do the same when i see one
thanks
daz

epi · « **Reply #2 on:** February 04, 2011,16:44:20 »

Any more info on this PSU/Inverter combi, only seen smaller sets with this type, code? photo?
Found no info on the web.

Mulja tv repair portal · « **Reply #2 on:** February 04, 2011,16:44:20 »

Kilroys · « **Reply #3 on:** February 05, 2011,04:15:13 »

Are we talking about power/inverterboard BN44-00264C.
Screw off 4 black and 1 blank then push the board against the mainboard,
not the small ones that is for the tubes holder.

epi · « **Reply #4 on:** February 05, 2011,10:16:12 »

Kilroys for the info, I've located a schematic, check downloads if its not there, I'll upload.

Frank

sinclairtv · « **Reply #5 on:** February 05, 2011,12:40:28 »

Thats the pic of the board..I didnt take a photo, I was just glad to get it off the bench!

Mulja tv repair portal · « **Reply #5 on:** February 05, 2011,12:40:28 »

Turnip · « **Reply #6 on:** February 05, 2011,13:22:13 »

Hi Sinclairtv,

Did you make a pound ? hope so - few piccies and such - ah well - these glib youngsters - Chris

cheeky2 · « **Reply #7 on:** June 21, 2015,17:22:33 »

I know this an old post However this board is easily removed by taking out the mounting screws and then sliding the board to the left :) I guess originally you tried removing the board directly towards you which would have caused the issues you describe!
So anyone else trying to remove psu/inverter follow this advice :)
Just had two Samsungs both with the psu so a dab hand with removing them :)

For anyone interested had this psu blowing 3.15A fuse turned out following items blown as a result of ic going belly up!
ICM801 ICE3BR1065JF
CM806 1KV 100Pf
RM831 1w 0.4R
DM808 1N4148
Just waiting for parts to arrive....

sinclairtv · « **Reply #8 on:** June 23, 2015,14:32:41 »

Yeah I know now how to remove the panel. Was a learning curve anyway

cheeky2 · « **Reply #9 on:** July 09, 2015,02:57:25 »

I know what you mean!

Well good news the psu parts arrived and now its all working :)

Mulja tv repair portal · « **Reply #9 on:** July 09, 2015,02:57:25 »

Mulja tv repair portal

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