Re: Samsung 2493 HM issue
Unfortunately no !
zulururu
Member
Last Activity: 05-08-2012, 10:03 PM
Joined: 08-04-2011
Location: Toronto, Canada
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Re: Samsung 2493 HM issue
With all the hard work you are doing, you deserve a good meal ;-)
I just had homemade veal paupiette (stuffed escalope of veal) with mushrooms onions and cram sauce ! It was good too !
Here is what I find for the opto isolators:
[B]Power OFF:[/B]
A/ 1.13V
B/0.66V
C/19.4V
[B]Power ON:
[/B]
A/ Fluctuating between 2.2 V and 9.5 V probably going even higher if I leave the probes o it for a longer period of time.
B/1.7V
C/0.15V
By the way, you...Leave a comment:
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Re: Samsung 2493 HM issue
Don't worry PlainBill, take your time and Bon appetit ;-)Leave a comment:
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Re: Samsung 2493 HM issue
Oops, here comes something else, I juste checked for voltage on the big 450V 82 uF capacitor for voltage and, power On as well as power Off I have the same voltage 163V ( I used to have 378V with power ON, 163V with power Off)..... did I do anything wrong ?Leave a comment:
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Re: Samsung 2493 HM issue
Oups, Sorry about the measurement of area "C":
1-2, 2-6, 5-3 and 3-4 gives me all no continuity (infinite resistance)
- "E" gives me 0.6 ohm
- "I" gives between 3V and 9V DC constantly changing .....Leave a comment:
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Re: Samsung 2493 HM issue
Thanks again for the explanation !
I did the measurements, Here are the results:
A/ all around 0.7 ohm
B/ As per the picture below:
[B][COLOR="red"]For the 2 upper ones[/COLOR][/B]
Between pin 1-2: 23,4 ohms
Between pin 1-3: 23,4 ohms
Between pin 2-3: 0.5 ohm
[B][COLOR="Red"]For the 4 lower ones:[/COLOR][/B]
Between pin 1-3: no continuity (infinite)
Between 1-2: no continuity (infinite)
Between 2-3: 0.5 ohm
R1: 22.5 ohms...Leave a comment:
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Re: Samsung 2493 HM issue
Thanks for you help !
Just to make sure, when you say "check for shorts" do I have to check for a resistance which mean with power off and in between 2 poles or between a pole and the ground ....or does it mean check for voltage between 2 poles or again between the pole and the ground ?? Excuse my ignorance !Leave a comment:
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Re: Samsung 2493 HM issue
I had to desolder to have a correct reading and I have 11nF so I guess it's good....Leave a comment:
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Re: Samsung 2493 HM issue
Hello again, I did the measurements with pin 4 as the ground and I have the same results +/-0.02v.... I will be waiting for your answer about CM812 and check it tomorrow .
Have a good day,
ZulururuLeave a comment:
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Re: Samsung 2493 HM issue
Thank you Plainbill, I will measure that, also my DMM doesn't have capacitance function, I discovered I have one at work I can use which has capacitance function, should I use that one instead ? If yes, to measure capacitance, should I desolder CM812 or there is no need for it ??Leave a comment:
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Re: Samsung 2493 HM issue
After more than a month, I've finally received my SMPS controller ... but after installation, unfortunately, my monitor is still not working .... I still don't have 5.3v or 24v ....
Do you have anymore suggestion ?Leave a comment:
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Re: Samsung 2493 HM issue
Ah ok Thanks Alexanna !
I ordered an SMPS controller on August 19th apparently, it's coming from Australia and I still did not receive it, so as soon as I install it, I will let you know if that worked, if not, I will try to check that capacitor !
Thanks for the heads up though !
Cheers,Leave a comment:
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Re: Samsung 2493 HM issue
Is it a question for me ?? if yes, my DMM doesn't have a capacitor range .....sorry !Leave a comment:
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Re: Samsung 2493 HM issue
On mine it's written on the top:
12 NJ 630v
some kind of a reversed "C" 4 MMKP
On the side of it I can read:
PILKOR
WK0747
I hope this help !Leave a comment:
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Re: Samsung 2493 HM issue
Hello all,
Just to let you know that I still didn't receive my SMPS controller, so taht's why I didn't update that post yet ! It should arrive soon hopefully !Leave a comment:
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Re: Samsung 2493 HM issue
Excellent ! I just ordered it for 5.8USD postage include !
I will let you know if that fixed it !
Thanks you again !
GillesLeave a comment:
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Re: Samsung 2493 HM issue
I shorted my DMM probe and I read 0.4 ohm but I realised I made a mistake when I gave you some value of 4 ohms, it was a misreading and was actually 0.4 ohm ! Sorry about that !
I measured all the resistors around the big capacitor, here are the results:
RB801 reading 100060 OHMS vs colour code 10*10000 +/-5% OK
RB802 reading 97600 OHMS vs colour code 10*10000 +/-5% ok
RM801s reading 32.7 OHMS vs colour code 330 /10 ok
RM801 reading 0.6 OHMS vs colour code 228*0.1 problem ?
RB808 reading 2.4 OHMS...Leave a comment:
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Re: Samsung 2493 HM issue
I did my homework, First of all, I found a magnifying glass at work !!!
You are right (as usual ) there are letters on the 2 transistors, on the one on top, I can read "W5", on the bottom one, I think I read "P" or "1P".
Excuse my ignorance but no, I don't know what that mean when there are connections in some pictures and not on others !
I measured the resistance between the red point and pin 11 and it doesn't seems to be connected (1 on the left side of my DMM screen in every range mode)...Leave a comment:
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Re: Samsung 2493 HM issue
First of all, thank you very much for the explanation on the resistors, and the more I look at my 487 ohm resistor, the more I see an 4R7 ! So this one seems to be good !
I measured the resistance between the circled components, I labelled them from the lower left corner 1, then clockwise 2 is the to pin, 3 is the right one.
For the component circled at the top of the picture, I've found:
between pins 1 and 2: 21300 ohms
between pins 1 and 3: 4 ohms
between pins 2 and 3: 21300 ohms
...Leave a comment:
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Re: Samsung 2493 HM issue
Here are some more values with the[B] monitor ON[/B]:
Voltage between pins
4 and 1: 5.05v
4 and 2: 5.05v
4 and 3: 2.54v
4 and 5: 5.08v
4 and 6: 0.07v
4 and 7: 0.07v
4 and 8: 5.04v
4 and 9: 14.60v
4 and 10: 0v
4 and 11: 0.19v
4 and 12: 14.06v
4 and 13: 0v
4 and 14: 0.27v
4 and 15: 15.06v
4 and 16: 5.04v
For the resistors, transformer and diode I unplugged the monitor
[B]TM801[/B]: 0.8 ohm
Diode [B]DM804[/B]:...Leave a comment:
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