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Equipment Repairs => LCD TV forum => Topic started by: sinclairtv on February 04, 2011,13:41:34

Title: Samsung LE40B550A5 near disaster
Post by: 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.

Title: Re: Samsung LE40B550A5 near disaster
Post by: daz on February 04, 2011,14:12:02

thank for the warning
 :08:
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

Title: Re: Samsung LE40B550A5 near disaster
Post by: epi 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. :brinda:

Title: Re: Samsung LE40B550A5 near disaster
Post by: Kilroys 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.

Title: Re: Samsung LE40B550A5 near disaster
Post by: epi on February 05, 2011,10:16:12

 :c017: Kilroys for the info, I've located a schematic, check downloads if its not there, I'll upload.

Frank

Title: Re: Samsung LE40B550A5 near disaster
Post by: sinclairtv 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!

Title: Re: Samsung LE40B550A5 near disaster
Post by: Turnip 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

Title: Re: Samsung LE40B550A5 near disaster
Post by: cheeky2 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....

Title: Re: Samsung LE40B550A5 near disaster
Post by: sinclairtv on June 23, 2015,14:32:41

Yeah I know now how to remove the panel. Was a learning curve anyway  :72:

Title: Re: Samsung LE40B550A5 near disaster
Post by: cheeky2 on July 09, 2015,02:57:25

 I know what you mean!

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