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Service manuals & datasheets => LCD TV forum => Topic started by: satelliteone on May 13, 2010,20:21:53

Title: Samsung LE32B350 Power Supply schematic
Post by: satelliteone on May 13, 2010,20:21:53

looking for a schematic for the power board.

HV32HD_9ss
BN44-00289b

symtoms vertical bands on screen, then powering off. afer 20secs. back light also powers down.


ta in advance

Title: Re: Samsung LE32B350 Power Supply schematic
Post by: Turnip on May 16, 2010,10:35:57

Hi - Sat,
No info, how about a piccy - Chris.

Title: Re: Samsung LE32B350 Power Supply schematic
Post by: satelliteone on May 22, 2010,14:44:43

yup will do, gettin pic back in a while

I have checked voltages at the PSU`s ass end  all seems fine. no un-usual voltage drops. Whilst powering up.

It lights up the tubes, powers up, then in 10 secs powers back down with a flashing standby light. Trying to look for tell tell signs.

drew

Title: Re: Samsung LE32B350 Power Supply schematic
Post by: satelliteone on May 22, 2010,15:05:58

TV


http://i31.photobucket.com/albums/c357/satelliteone/temp/whole.jpg

PSU

http://i31.photobucket.com/albums/c357/satelliteone/temp/IMGP3824.jpg

Power plug on main PCB

http://i31.photobucket.com/albums/c357/satelliteone/temp/IMGP3827.jpg


http://i31.photobucket.com/albums/c357/satelliteone/temp/powerconnector.jpg


The PSU has the high voltage suppy built in to the main switch mode. The back side has the SMD components.

Title: Re: Samsung LE32B350 Power Supply schematic
Post by: satelliteone on May 22, 2010,19:28:31

some more pix of the screen in action.

Vertical lines, when i change the remote buttons, i get different vertical screens. Seems like data is trying to show, and its getting currupted. The board at the bottom of the set, the smallest one, must be the panel driver. or to that effect. One of the SMD componets is getting rather hot, when powered up. I got a feeling its this board at fault.

http://i31.photobucket.com/albums/c357/satelliteone/temp/IMGP3837.jpg

http://i31.photobucket.com/albums/c357/satelliteone/temp/IMGP3835.jpg

http://i31.photobucket.com/albums/c357/satelliteone/temp/IMGP3834.jpg

http://i31.photobucket.com/albums/c357/satelliteone/temp/IMGP3833.jpg

Title: Re: Samsung LE32B350 Power Supply schematic
Post by: Κώστας on May 23, 2010,02:46:21

cold solder on the main board or replace it

Title: Re: Samsung LE32B350 Power Supply schematic
Post by: satelliteone on May 25, 2010,14:03:06

Cold solder?. do you mean a reflux.

cant find any boards in the usual places, this model that new?.only see some PSu`s..

i take it no one has the service manuals to these chasis.

Title: Re: Samsung LE32B350 Power Supply schematic
Post by: Vladimir H on June 29, 2010,17:29:13

 U804 --LD1086DT18TR on T-Con board

Title: Re: Samsung LE32B350 Power Supply schematic
Post by: Turnip on July 04, 2010,11:50:23

Hi Vlad,

Do you mean re-flow or replace U804 (even if we could get one) Unusual maybe for invertor to cut after a few secs with this problem  ?  Curious  - Chris.

Title: Re: Samsung LE32B350 Power Supply schematic
Post by: Vladimir H on July 05, 2010,12:12:25

 :biggrin2:
replaceU804