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rphplasma
Joined: 11 Mar 2010
Posts: 16
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 Posted: Fri Apr 30, 2010 12:02 am Post subject: |
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| I have not checked that yet but will. If I do not is that an indication that SMPS is bad? |
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rphplasma
Joined: 11 Mar 2010
Posts: 16
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| Posted: Fri Apr 30, 2010 3:15 pm Post subject: |
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| Ckecked va & vs at main power supply. va was 70v ( correct) but vs was 2.1v but should be 200v. Would this cause my problem. I tried to adjust vs on main power supply but it would not change ( strange). I tested at y sus but only got 2.1v , which sounds correct if main power was only supplying that much. |
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minnie
Joined: 18 Aug 2005
Posts: 2880
Location: Hell
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| Posted: Mon May 03, 2010 7:49 pm Post subject: |
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| Unplug the connector to the VS and see if it comes back up with the sustain board unplugged. |
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rphplasma
Joined: 11 Mar 2010
Posts: 16
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| Posted: Mon May 03, 2010 9:40 pm Post subject: |
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| I isolated the ps all by itself and still no VS voltage. I had all boards disconnected from it ( y & x sus ) but no vs. I tried each board connected individually but still no vs voltage. I ordered a ps so we will see if that works. My only ? is I read somewere that the logic controls the ps to turn on the vs , is that true? I am hoping bad ps even though I get sound and lights up front. |
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rphplasma
Joined: 11 Mar 2010
Posts: 16
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| Posted: Mon May 03, 2010 9:42 pm Post subject: |
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| forgot to mention that when I say all boards disconnected I also had SMPS disconnected also but stil no vs |
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rphplasma
Joined: 11 Mar 2010
Posts: 16
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| Posted: Wed May 05, 2010 9:54 pm Post subject: |
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| ok I put on the new ps and tv works but I hear what I think is a loud buzz from the y sus. I turned tv off and will go over all voltages. I have the old y in now but have a new y if I need it. Do you think the y could cause the ps to go out but the y still work now that I have new ps. I would hate to blow another ps if the old y is causing the problem. |
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vinod kumar
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| Posted: Fri Mar 07, 2014 3:03 pm Post subject: Samsung plasma PS43D490 with sound but no picture |
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| Hey Please someone help me I have Samsung Plasma PS43D490A1LXL with sound but no picture , I have checked the pcb board its working fine with proper voltages when i remove the X-sustain (x-main) board , if i would connect the x-sustain board voltages are dropping , what would be the problem & how to rectify it . is x-sustain board is repairable ..? if repairable, which components would be the problem for this cause . My X-sustain board Model no :42DH , PCB NO:LJ41-09478A,PBA NO:LJ92-01796A & REV NO:R1.8(11/10/26) |
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