Hi Folks!
I've searched high and low for a schematic of this Samsung (Hansol) power supply to try and figure out what the devices are in the gate drive circuit for the backight inverter h-bridge.
Both MOSETS read open D-S.
One of the G-S zener diodes was shorted, the other reads open. I need to know what their zener voltage is. I suspect somewhere around 10 volts.
There are a few resistors that have changed value, and I think I have the right numbers off of those resistors.
There are these other devices identified as B1803 and B1804 that are in series with the gates. One reads shorted and the other one, which is cracked, is reading around 280k ohms. There are no identifying marks on these devices.
Any thoughts on what they might be?
A schematic would really be nice, too!
Thank you VERY much for any help you can provide!
Craig
I've searched high and low for a schematic of this Samsung (Hansol) power supply to try and figure out what the devices are in the gate drive circuit for the backight inverter h-bridge.
Both MOSETS read open D-S.
One of the G-S zener diodes was shorted, the other reads open. I need to know what their zener voltage is. I suspect somewhere around 10 volts.
There are a few resistors that have changed value, and I think I have the right numbers off of those resistors.
There are these other devices identified as B1803 and B1804 that are in series with the gates. One reads shorted and the other one, which is cracked, is reading around 280k ohms. There are no identifying marks on these devices.
Any thoughts on what they might be?
A schematic would really be nice, too!
Thank you VERY much for any help you can provide!
Craig
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