Hi guys,
Ive got a LG 42" plasma here thats got an issue on the Power PCB, firstly ive read the basic guides put on here(very informative btw) and did a forum search before starting a new thread, but im after a little more specific advise
The first issue noticed is the power light would be on stndby at the front of the tv, pressing the power button or applying power you could hear a relay fire after a couple of seconds.
So the first thing i did was checked the input fuse all good, the board was so dusty at the time i couldn't even see the second one between the heatsinks.
I checked the boards output, 5v = 4.8v steady, but the VS and VA would both go up to around 58~v then the relay would fire and back to 0v
after giving it a damn good clean out I found the blown 250v 4A fuse(pictured below) in the center of the board, replacement just blew again, removed all other connectors to the power PCB and tested again same result. Fuse blows as soon as power is applied.
So im guessing the issue is with the VS power circuit, Im also at this point guessing its a short as the fuse really pops when powers applied
Inspected the board and i cant see any bloated caps or dry joints, all that said i need to start chasing the circuit, can anyone with a bit more experience with plasmas point me to a possible source.
Power PCB model number is: EAY32808901
5v, VA=61 VS=190
Ive got a LG 42" plasma here thats got an issue on the Power PCB, firstly ive read the basic guides put on here(very informative btw) and did a forum search before starting a new thread, but im after a little more specific advise
The first issue noticed is the power light would be on stndby at the front of the tv, pressing the power button or applying power you could hear a relay fire after a couple of seconds.
So the first thing i did was checked the input fuse all good, the board was so dusty at the time i couldn't even see the second one between the heatsinks.
I checked the boards output, 5v = 4.8v steady, but the VS and VA would both go up to around 58~v then the relay would fire and back to 0v
after giving it a damn good clean out I found the blown 250v 4A fuse(pictured below) in the center of the board, replacement just blew again, removed all other connectors to the power PCB and tested again same result. Fuse blows as soon as power is applied.
So im guessing the issue is with the VS power circuit, Im also at this point guessing its a short as the fuse really pops when powers applied
Inspected the board and i cant see any bloated caps or dry joints, all that said i need to start chasing the circuit, can anyone with a bit more experience with plasmas point me to a possible source.
Power PCB model number is: EAY32808901
5v, VA=61 VS=190
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