Re: lg 60pc45 Stanby Fault
what powersuppky boards do u have ?
what powersuppky boards do u have ?
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Re: lg 60pc45 Stanby Fault
yea thats the same boards i have also..Comment
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Re: lg 60pc45 Stanby Fault
Do you have Vs from PSU, but no Va? What does Va do if you unplug the Y- and Z-sus? Note, if Va is short, there is a reasonable chance the plasma panel is bad, so keep that in mind.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: lg 60pc45 Stanby Fault
VS is present and hits the right voltage, i've tried disconnecting all boards apart from the control board main board and power supplies and the VA never goes above 1v at power on
am i correct to think that if i disconnect all ribbon cables from the panel to there boards and i still get no VA this would rule out a bad panel?Last edited by anotherdude; 01-21-2014, 03:21 PM.Comment
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Re: lg 60pc45 Stanby Fault
did u check cp501 &cp601. its at top of sub power boarand at bottom of main powee boardComment
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Re: lg 60pc45 Stanby Fault
Va is only fed in through the Y- and Z-SUS, so if you unplug that power connector and Va does not rise it is probably not a shorted panel holding it down.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: lg 60pc45 Stanby Fault
It's a deliberate omission that pin. See above for tracing out Va fault by isolating Y and Z.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: lg 60pc45 Stanby Fault
Just unplug Vs/Va connector. Does Va rise or not?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: lg 60pc45 Stanby Fault
OK, there's a fault on the PSU. Is that fuse with the red band OK?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: lg 60pc45 Stanby Fault
Check all transistors and Mosfets located around the VA adjustable potentiometer. Especially the half moon looking transistors that feed off the leg of the adjustor.Did I leave the soldering iron on?Comment
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Re: lg 60pc45 Stanby Fault
In circuit for now. Really need to find a schematic to suggest much. Diodes on output side can also be checked.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: lg 60pc45 Stanby Fault
thanks for everyones input, giving up on this and hopefully a new power board will fix it, looking for a needle in a haystack IMOComment
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Re: lg 60pc45 Stanby Fault
i hear ya there...im on my last nerve with my board alsoComment
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This is my first attempt at troubleshooting a board like this, I know I could just buy a new board but I'm curious to figure out how this works. I've been testing different components in the evenings this week and I think the problem is with the IC failing to start up for some reason. When the board is plugged in there is no standby voltage.
Then today it randomly sprung to life like a zombie but shortly died thereafter. I have no idea why it would have done that and its the first time I've seen it running. I discharged capacitors on the board last night, then it was sitting today.... -
I have this LG 42LG3000 Tv which operates on all inputs without any issues whatsoever. However when you try to turn the Tv off the screen goes blank as it would normally however it then turns itself back on again!
So far I have replaced the main board without any resolution to the problem.
When the inverters master and slave VIT71053.54 VIT71053.55 are disconnected from the power supply then the TV will turn off as it should (obviously without any ccfl output).
I have read through a few posts for this model without anyone having this issue as far as I can tell.
I... -
Hi. I got a Vizio with no power or standby, and won't turn on with remote or button. I checked the voltages on the connector and all read 0.00V or nearly 0(0.050 ON/OFF pin). None of the pins are labeled STB for standby although I do see some 5V pins. Other than the obvious standby led, which isn't coming on, is there a way to check for standby voltage on this PS. I'm trying to see if my problem is the PS or mainboard. Some Vizios I have fixed with no standby led me to think it was the PS but it turned out being the mainboard. Any experience with this set would be greatly appreciated. -
Hello everyone. 😀
As per thread title, this unit has a serious SMPSU fault. It blows F1001, which is a 10A M205 in the phase from the mains input.
Very first thing I tried, was simply replacing the fuse, but the replacement ceramic fuse blew immediately.
Looking at the schematic for this PSU, I then removed what I thought was the next likely candidate: D1001 - the HV main bridge rectifier.
This isolated the fault(no longer blows the main fuse), but does not point me to the actual fault.
There are no devices that have exploded or otherwise show signs... -
Hi all.
I started a thread while back regarding TV power supply standby circuitry as it is something I am not quite on top of.
SMPS theory and function is becoming more familiar, however the standby part is still a bit of a mystery.
Anyway, a friend has this TV with the above mentioned power supply board which has no standby voltage, nor any other voltages leaving the board.
The mains AC comes in fine, gets filtered and rectified with power is on the main filter cap as well as the transformer and drain pins of the ICE3B0665J, but that's it.
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