Hp elitedisplay e231 monitor

[peste]

Hi ..I need the diagram of the power supply of this monitor .. liquid leaked in it, and some parts exploded ... I did not find the exact scheme, but just something similar .. does not want to start .. thank you ..

[lotas]

What was the PWM U901?

[peste]

Originally Posted by lotas

What was the PWM U901?

I don't know exactly ... it had a hole in it ... but, I'm sure of the LD757 ... the rest couldn't be seen ... I solder the LD7575, but maybe it was the LD7576 ...
Q901 = P0765ATF
D908 = 1N4148
R923 = 220 OHM
R924 = 0.47 OHM
I don't know the value of R915, R917, U901..the rest of the parts are OK..I didn't find an exact scheme, I tried the approximate schemes I found, but it doesn't start ..

[lotas]

This is somewhat similar to your circuit.

[peste]

Originally Posted by lotas

This is somewhat similar to your circuit.

yes .. thanks for the diagram ... the problem is that I still have resistance R915 in series with R917 and I don't know the value ... although LD7575 is compatible pin to pin with LD7576, less pin 1 (CT, RT) .. .This pin is for programming the switching frequency. By connecting a resistor to ground (LD7575), .... By connecting a
capacitor to ground (LD7576) .. here I think is the problem .. I will put a resistor with value (0) instead of R915 ..

[peste]

everything works perfectly..for LD7576 it is used in pin "1" C927 = 0.047mf, without R921, for LD7575, C927 is removed, and R921(100Kohm) is solder..R915 strap ..

[lotas]

So his native PWM was LD7576.

[peste]

Originally Posted by lotas

So his native PWM was LD7576.

Yes..