Samsung SyncMaster 920WM, part identification.

[jet]

Hi All,

I am trying to identify the part number for D803 and D805. The monitor is a Samsung SyncMaster 920WM, type number GH19WS.

This monitor does the typical back-lite comes on for two seconds and then off. I have removed and re-soldered transformers to the lite and replaced all caps. Still no joy, D805 is discolored and I can't read the value of the part. I also need to confirm the part number of D803.

Both D803 and D805 are dual diodes, what are typical reading I should get across there junctions with a DVM?

Thanks, Joe

[selldoor]

Hi - I cant see this model has featured on here before so we are just guessing what the diodes you mention look like - a picture wold have done it.

If you read this 2 seconds to black guide by retiredcaps it says how to test
most things - start at post 19
http://www.badcaps.net/forum/showthread.php?t=10419
Welcome to the forum-
We can help a lot more if you please post good clear pictures of the whole chassis, and then pictures of each board, front and back and close up of connectors, (max resolution 2000x2000 and 2MB) using the manage attachments button, which is found by clicking "go advanced" under quick reply.

Please do not post inline and offsite as they slow down the loading of pages.

Examples of what is needed
http://www.badcaps.net/forum/attachm...1&d=1290283049

http://www.badcaps.net/forum/attachm...7&d=1280167246

It will be useful if you can say a bit about yourself - skills tools etc.

[Rtech]

Two things spring to mind....the 1st is have you confirmed that it is not the Backlights themselves,which included the wiring to them that is NOT causing the problem ????
2nd..I assume that the diodes you are referring to are 3 pin devices,probably mounted on a Heatsink,and are Schottky Diodes ??/If so Put you meter on 'Diode check' if you have that function, and with the Black lead on the Centre pin (MAKE SURE NO POWER IS ON), you should get a reading the same to both outside pins of each Device. Then put the Red in the Middle and do the same....IF you get a short Circuit then they are faulty,if not they are probably OK.
A Photo would br helpful of course..

[Gingerbeer]

I don't know if this of any help, but I had a Syncmaster 932 exhibiting identical symptoms, to those mentioned in the OP.

I only had to replace the inverter transformer on the power board, and it's been working flawlessly for about 6 months.