Re: Samsung 245BW
And what may that be?
Sam I Am
Senior Member
Last Activity: 04-01-2011, 11:23 AM
Joined: 06-13-2010
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Re: Samsung 245BW
Pins 3 & 4 of PC802S are showing 18V with the front power button in the off position.
Pin 3 shows 19.7V and Pin 4 shows 0V with the front power button toggled on.
CP801S shows 386V with the rear rocker switch (beside the mains plug) in the on position and 165V with the front power button toggled on.Leave a comment:
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Re: Samsung 245BW
Must of got distracted by Jenn.
ICM801 shows MC33067P. See attached....Leave a comment:
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Re: Samsung 245BW
Well.... this is about the best I can do at the moment.
As far as the voltages:
S/B is 5.2V off and 5.2V on
PSON is 0V off and 3.2V on
Opto (PC802S) closest to CN851 at Pin #1 is 5.2V off and 1.2V on
Pin #2 is 4.6V off and 60mV on
Next Opto (PC801S) at Pin #1 is 4.9V off and 4.9V on
Pin #2 is 3.9V off and 3.9V on
(Both of these voltage readings dropped a few mV when cycling from off to on)
Next Opto (PC804S) at Pin #1 is 5.2V off and 5.2V on
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Re: Samsung 245BW
Sorry about that.
Ask and ye shall receive... I always say.
Here is the front, back, and four quadrants of the back.
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Re: Samsung 245BW
Beats me in what is causing a lack of 24V output.
I thought is was the opto that was toasted.
Any ideas???Leave a comment:
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Re: Samsung 245BW
See pic #4.Leave a comment:
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Re: LG Plasma TV has gone on the blink
The clicking sound is the relays... no biggee.
How many of the tiny green LED's stay lit up on the board?Leave a comment:
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Re: Samsung 245BW
So.... would 0V at the opto output mean it is toasted? And would this also explain why I am not getting 24V at the CN85 connector?Leave a comment:
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Re: Samsung 245BW
I'm looking at 6V on the input side of the opto (PC803S) and 0V on the output side. If the opto is fully functional, what approx. voltage should I be seeing on the output side?Leave a comment:
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Re: Samsung 245BW
Thanks for the reply RC,
The red one (RB808) ohms out at 2.1. The resistors were some of the first things I checked after I found RB801 burnt.
The other 245 thread concerns itself primarily with the 173A board, not the 195A board.
Apparently Samsung decided to "update" the board by finally getting rid of the infamous F9222L chip that so many have had the unfortunate chance to become acquainted with.
I've got this board where I can power it up with everything else still attached allowing me to take voltage measurements...Leave a comment:
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Samsung 245BW
I recently acquired a 245BW with a no picture issue.
Took it down and did a thorough visual inspection on the PS finding an open (burnt in the center) resistor (RM801).
That didn't fix it so went on to voltage checks.
Found that 24V was not reaching the output connector.
My question is: with 6V reaching the opto (PC803S), shouldn't I be seeing something besides 0V on the other side?
I suspect a toasted opto and am simply looking for confirmation/guidance from someone with more experience in these matters.
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Re: LG 50PG20/UA Shuts off
What are your voltages (Vs, Va, etc.) with all boards connected?Leave a comment:
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Re: LG Plasma TV has gone on the blink
First, put all boards back in and check all output voltages of PS.
I will need closer pics of the PS output connectors.
SamLeave a comment:
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Re: 820uF 25WV 10mm x 20mm -- available anywhere?
FYI guys....
I've been using caps from The Cap King for the past several months and have yet to have any issues. They are my "go to guys" for Ruby's and other quality caps when DigiKey is out of stock. Also, they get your order shipped quickly.
That's been my overall experience with them.
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Re: Samsung HT-AS730ST
I should of realized the four second delay thing as the Samsung LCD panels act more or less the same way when you power them up.
All of the voltages that drop off to 0V, "peak" for only a split second. "Peak" meaning the DVOM will show that particular rails correct voltage momentarily before dropping off to 0V or some other substantially lower value. If you are not looking directly at the meter, you will miss this "peak" reading.
P-S stays at 5.5V with power button on, goes to 140mV with power button off.
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Re: Samsung LN-S3251D Black Screen
A more clarified pic.
Still as to the disappearance of almost 5V. 
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Re: Samsung HT-AS730ST
So.... since P/ON is low, what would be the most likely cause of this?
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Re: Samsung LN-S3251D Black Screen
I've modded the last pic to reflect the latest measurements, etc.
I have no idea what type of component is K72 T9 so I don't know what to make of the voltage reading.
And where did the 4.7V go?...
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Re: Samsung LN-S3251D Black Screen
Hey ....what happened to the pic????
Let's try this again.
There we go...
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