Re: Samsung Syncmaster 245BW

Here are some pictures of the inverter when I took the display apart. At the time I noticed that the leads going to the top and bottom lamps were not positioned the same as the rest of the leads. I just put it back together with the lamps plugged in to the inverter. This time I moved the leads of the top and bottom lamps to be in positions that are more like the rest of the leads. The display is face down since I have not put the back of the case on, but it looks like all six lamps are on steady. It would be GREAT if that was all it took to fix the display...

Re: Samsung Syncmaster 245BW

Thanks for the the data sheet info. I used it to make some better measurements. These measurements are with respect to pin 6 which is grounded.
Pin 1 Vsense 2.49 v
Pin 2 AVout 2.60 v
Pin 3 Multin 0.81 v
Pin 4 Isense 0.013 v
Pin 5 Detin 1.89 v
Pin 6 Ground
Pin 7 Gtdrv 5.35 v
Pin 8 Vcc 15.09 v

When making these measurements, the 82 uF cap was at 390 v and the ouput voltages were present at 24.4 v and 5.4 v.

Does that make more sense?

Regards, Diy...

Re: Samsung Syncmaster 245BW

jetadm123,
Thanks for your reply. I am in the United States so I am applying 120Vac to the power supply.
It is a bit difficult to plug all the circuits into the power supply and still be able to access it to make measurements, so I assumed that the inputs to the supply were more important than the 6 outputs to the back lights and only connected the inputs. I turned the power on and measured 24.4V and 5.4V on the power supply outputs. I also measured the 82uF cap again and now it read 390V. Attached are some pictures of the component...

Re: Samsung Syncmaster 245BW

Hello guys,
After 18 months, my refurbished Syncmaster 245BW has died. Last month it would occasionally make a noise that was a single, fairly loud crack. This would repeat every once in a while, but hours apart. It had no apparent effect on the display. Then last week I started to notice a flickering in the intensity of the display. The flickering was in a pattern of wide horizontal bands several inches wide, which looked like it could be the back lights. The flickering was quite intermittent, but finally the screen simply went dark. I found...