Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
Hahah Very well said. My hats off to you. We now share the same pain! And knowledge. Thanks again buddy!...
ryankam
Member
Last Activity: 04-28-2012, 02:02 PM
Joined: 12-30-2010
Location:
-
Re: Samsung 215tw still dead
I had a customer give me two identical monitors that had caps replaced by them. They turned out to not have all been replaced. I took caps off one by one and replaced them until my monitors powered back up. Turned out to be the startup caps on the 5v standby.
Also I have a Hyundai 24inch monitor with similar issues to yours. I have not checked if it is due to a short at all. But I know those hyundai's have logic board issues....Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
Customer tells me he got some caps from ebay and some laying around the house. Hahaha. Never trust the CUSTOMER!...Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
Yes the 22uf cap worked fine. I guess it has nothing to do with timing so the uF wasn't to important. Yea I never trust a customer word when they say I did xyz so I just redid the board one by one starting with that startup cap and hit it on the head....Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - Repair Success - Thanks Guys!
The odd thing is both power supplies had the exact same bad cap. Customer said he replaced all caps but I think he did not. But come caps on the board were capxon and the replaced ones were samxon. The startup one was samxon but I double customer touched it. Anyway on one power supply I got 11.25 V and no power at all on the secondary side. The other was giving 11.50v and giving 2.62v on the secondary. So there certainly is a fragile balance. Thanks again guys....Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - Repair Success - Thanks Guys!
Hey Everyone,
Thank you for your input. I remember reading a post by I believe plainbill a while ago where he stated that the startup capacitor for the standby transformer may be bad but not visibly. I was getting 11.50V on the Q that was saying it should get 12V before it turns on and hands over power. I thought the 11.50V was enough or close enough. I said you know what let me change that 50V/10uF cap out and put this 50V/22uF cap in here and see what happens. I did this on the primary side of the...Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
OK Update. Here are some new pics. Also I removed caps one by one and the voltage kept rising. The highest I got was 3.98V I notice as I connect it back to the logic board it drops to 2.6v again. I believe that drop is so it can achieve the 5v since it says it gives off 6.2V. Not sure. Anyhow I have included detailed pics. Please let me know what you may think. Thanks plain bill again. Also I have replaced all caps again on this board. Not just ones customer changed....Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
Very good bill. I do understand to that standpoint how they work. I should have been more clear in explaining that the power was tested for secondary power with nothing connected to it but the wall plug. So there was no load at all. There is one 2200uf cap the customer did not change. I highly doubt that one cap is causing all this trouble but then again there are many ghosts in the machine. I Am going to post a few highdef pics just to see if you can see anything im missing. I am going to remove...Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
I didnt know he asked for it he just said it was not so good a pic. Ill do that when I am home in the AM. I posted their voltage ratings but ill get the pic.
What I was hoping for was if someone knew a common reason why something that is normally supposed to be at a certain voltage is 4 volts lower than what it's supposed to be. Is it common for bad caps to pull down voltage, or for bad fets to do so. Or maybe a resistor outta range. I tested all resistors though....Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
sss...Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
SeanC - The logic board says 244T on it by the way I just noticed it.
-158.2 is across main cap....Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
hey sean thanks again. I looked at that monitor on google and it looks dead onto the monitor I have. But this one is branded SUN. So thanks now I know where I can find another supply if this is bad to the point of no repair. Thanks bud....Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
Looks are deceiving in pictures.
I found a model number for the board: pslf101401a...Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
If you notice the glue has two points of contact. One is supposed to be on the cap the other is on what ever else. The glue is not touching any of the caps, they just didnt remove it. Any technical information is helpful. Thanks though sean.Leave a comment:
-
Re: Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
Thanks retired caps you had to give me about 30 more seconds the server kept telling me there was a security token error contact admin. I just resized images and now it works. Haha!Leave a comment:
-
Sun LCD (Samsung BR24CS) 24.1" - 2.3v Instead Of 6.2v Secondary
Hello All,
I have a power supply from this monitor that is giving me only 2.3V instead of the 6.2V listed on the board secondary. All the caps were replaced by the customer so I have no clue what the original sizes or voltages should have been but he said he kept all the voltages the same or increased them and the uF were the same so I have to take his word for it. Anyhow the PWM is a FSDM0565RB and I did some voltage tests on it but am not sure if that would determine if anything was shorted or not. I get 11.23v on the VCC pin and 1V on the Vfb pin. The main cap gives me 167V and I have...Last edited by ryankam; 05-26-2011, 12:08 PM. -
Dell Optiplex GX-280 - Repaired
Had a dell optiplex 280 that had several blown 6.3V/1800uF caps on the board. I noticed that the cathode side of the board is actually the anode side. Beware. I dont know why dell does this but it was so. Any way replaced the caps with 35V/1800uf caps and noticed that the orange light on the front of the computer was not blinking fast instead of powering up like it did before the replacement. I thought wow are these caps causing this issue. I said can't be. So I opened the power supply and there were 2 16V/1000uF caps blown in there as well. Very hard to see because they had glue all on top and... -
Dell Optiplex GX-520 - Repaired
Had 2 dell optiplex computers that were not running as they should. Slow, freezing, and casing all kinds of trouble. Opened them up for the customer and noticed right away several caps blown in them. In one of the machines 3 were blown in the other (identical machine) 4 were blown. The 6.3v/2200uf (2) and 6.3v/1800uf were blown in the machines so I went ahead and replaced them. The 1800uf one I could not find at store so I just put a 2200uf cap instead because it was not for timing, just a filter cap so it worked out fine. One thing you have to pay attention to with these dells that I almost missed... -
Dell Optiplex GX-520 - Repaired
Sorry Posted in Wrong Area! Please delete this post! -
Re: Sanyo TVs SUCK
Isn't that what I said. I never said TV's I said Screens!...Leave a comment:
No activity results to display
Leave a comment: