Re: Samsung Syncmaster 225BW
my interpretation as well. CCFL's it is.
I appreciate your help....
nmjwolf
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Last Activity: 05-24-2012, 10:03 AM
Joined: 01-07-2012
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Re: Samsung Syncmaster 225BW
Datasheet shows OVP going into the fault protection logic...so I assume if this is 0V then that part of the circuit is not enabled...ie chip is not faulted.
Thanks for your help.Leave a comment:
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Re: Samsung Syncmaster 225BW
The measurements are:
pin 2 0V DC
Pin14 2.35V DC
pin 15 0V DCLeave a comment:
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Re: Samsung Syncmaster 225BW
I suppose at this point I should stop being so cheap and buy a set of CCFL'sLeave a comment:
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Re: Samsung Syncmaster 225BW
4.96vdc chip is enabledLeave a comment:
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Re: Samsung Syncmaster 225BW
i measure 4.96VDC to gnd....Leave a comment:
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Re: Samsung Syncmaster 225BW
Got some better light here are the details:
OZ964CN
T01053 2P
0633CLeave a comment:
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Re: Samsung Syncmaster 225BW
that stamping is real hard to read...from what I can make out it is 64GN T005322p.
Meter is just a fluke 87.
Thanks for your help so far!Leave a comment:
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Re: Samsung Syncmaster 225BW
those both measure 13.16VDC
voltage levels don't bother me I deal with 4160V AC on a daily basis.
Leave a comment:
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Re: Samsung Syncmaster 225BW
F301 13.1VDC - 13.1VDC => fuse good
C305 and C306 0VDC measurement made on either side of caps to GND
C303 and C304 0VDC measurement made on either side of caps to GNDLeave a comment:
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Re: Samsung Syncmaster 225BW
do the CCFLs have to be plugged in for the measurements?Leave a comment:
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Re: Samsung Syncmaster 225BW
t301=1096
t302=1091Leave a comment:
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Re: Samsung Syncmaster 225BW
No I do not believe the backlights are coming on and that is why i can barley make out my desktop.
I have not found any shorts on u301.Leave a comment:
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Re: Samsung Syncmaster 225BW
F301 is good 0.1 ohms.
Using the datasheet found here:
I got:
U302
a) black on pin S1- red on pin G1 - record ohms => 3.68M ohm
b) black on pin S1- red on pin D1 - record ohms => .3M ohm
c) black on pin G1- red on pin D1 - record ohms => 3.88M ohm
a) black on pin S2- red on pin G2 - record ohms => 4.1M ohm
b) black on pin S2- red on pin D2 - record ohms => .3M ohm
c) black on pin G2- red on pin D2 - record ohms => 2.95M ohm
U301...Leave a comment:
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Re: Samsung Syncmaster 225BW
The screen does stay on...for hours just very dim.
The power LED does stay on (blue).
I do have a multimeter, but no other CCFL's to try out. I will read those posts and see what voltages to check hopefully that will point me in the direction of the part to replace next.
ThanksLeave a comment:
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Re: Samsung Syncmaster 225BW
Turning up the brightness does not help, its dark enough that photos do not turn out, but yes I can make out the menus and light colored webpages, ect.
It does not flash white then turn dark. Yes the cable between the inverter and the video driver board is plugged in.
330 - P12386-ND
680 - P12390-ND
820 - P12391-ND
I am sure that the caps are in the correct way around.
Perhaps you are correct that the CCFL's need to be replaced, but there have been lots of posts where that wasn't...Leave a comment:
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Re: Samsung Syncmaster 225BW
I just replaced all 5 of the caps on my 225bw with parts from digikey
2-820
2-680
1-330
The monitor used to have the standard flash of the desktop and then blank. That issue is now resolved....however the picture is very very dark...any ideas before I
it
Thanks!Leave a comment:
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