lg 60pc45 Stanby Fault

[anotherdude]

Friends LG plasma has been stuck in standby for some time and doesn't seem to want to come out of it, it tries to turn on or so it seems then goes back to stanby.

He's already had MCSD look at it and they couldn't diagnose it without taking it away and costing £$$£$

seen one youtube video with swollen caps with kind of the same issue but theres no bad caps that can be seen anyway

sustain issue?

[newtothis]

Re: lg 60pc45 Stanby Fault

Get some pics of the boards and chassis and get your DMM out

[anotherdude]

Re: lg 60pc45 Stanby Fault

Just got this in mine today, what a absolute monster screws and boards galore never mind the weight

ok so it tries to turn on from red standby to green then back to red within a second or 2

was measuring pins etc and the standby light disappeared left it unplugged for 5 minutes and plugged back in and standby came back on

Measuring one of the few pins i can as theres no voltage at many of them, the 6.5v is measuring just over 5v at 5.12v, at the first power board from mains supply

working on getting pictures but camera is acting up

[anotherdude]

Re: lg 60pc45 Stanby Fault

heres some pictures

not sure but theres one or 2 caps on the lower power board that has a little edge sticking out only ever so slightly but you can feel it, probably nothing but there the same caps i've seen on a video that was causing similar issues

ok got access to the buttons on the bottom to try turn on, the relay clicks the ctrl board lights up (d101 d102 d103 d104 leds), then the relay clicks again and goes back to standby

d101 does not light up at all and d102 remains lit until the 2nd relay click, also I have to wait 30 seconds to a minute before the tv will respond to pressing the button after going back to standby

measuring voltages at the brief turn on all seem fine 12v is there 6v goes to 6 from 5


reading through other posts with lg plasmas i thought i'd check out the AC_DET pin at standby it reads 4.25v then goes to just below 5v at power on

[anotherdude]

Re: lg 60pc45 Stanby Fault

tried disconnecting boards one by one to rule out etc but not entirely sure if the tv would even power up with a board being missing/damaged as is going into protection mode now anyway atm

[anotherdude]

Re: lg 60pc45 Stanby Fault

Va pin i'm measuring 0.20v-0.80v from standby to turn on, from the sticker on the back it should measure 60v, whereas the Vs does give the correct voltage

so a problem somewhere converting the current?

[anotherdude]

Re: lg 60pc45 Stanby Fault

any ideas ?

[anotherdude]

Re: lg 60pc45 Stanby Fault

anyone any idea on how to remove a overtightened screw, company who had a look previously has overtightened a screw on the power supply and won't move, head on the screw is just beginning to strip away guessing it was done with a drill

[Dang]

Re: lg 60pc45 Stanby Fault

anyone any idea on how to remove a overtightened screw, company who had a look previously has overtightened a screw on the power supply and won't move, head on the screw is just beginning to strip away guessing it was done with a drill

Get your screw driver and clamp it with some mole grips or pliers, whilst palming down the screw driver turn it with the mole grips/pliers always feeling what it's doing, this could strip it further so make sure you use a good, tight fitting screw driver.

[anotherdude]

Re: lg 60pc45 Stanby Fault

Get your screw driver and clamp it with some mole grips or pliers, whilst palming down the screw driver turn it with the mole grips/pliers always feeling what it's doing, this could strip it further so make sure you use a good, tight fitting screw driver.

thanks but no budging it considering trying to drill it out

anyone know if theres no VA voltage that it's definatly a psu fault?

only 1 of these psu's available at £100

[Dang]

Re: lg 60pc45 Stanby Fault

Get a hair dryer and heat it up using my above technique, might budge then, good luck.

[tocold4u2]

Re: lg 60pc45 Stanby Fault

you have the same boards as me...or looks like it but mine is in a 60pc1d-ul
lg....i had /same prolbems till something went out now no cycling clicks or standby light.
keep us posted

[anotherdude]

Re: lg 60pc45 Stanby Fault

you have the same boards as me...or looks like it but mine is in a 60pc1d-ul
lg....i had /same prolbems till something went out now no cycling clicks or standby light.
keep us posted

will do, not holding much hope, if i can confirm it is a psu the guy is prepared to lay out the cash for the new psu rather than scrap it or finding the fault

unsure whether it's the control board or the psu but the control board mentions nowhere about any VA whereas the VS is mentioned a few times

borrowed a screw extractor bit and made a new screw head onto the screw, board is now removed

seems the previous people removed 100v caps to test them i'm guessing, will get pictures of the back side up

[anotherdude]

Re: lg 60pc45 Stanby Fault

seems this company has been playing round with it at some point, or someone has one of the chips is completely missing a contact and some of the smaller components looks to have been resoldered poorly at some point

not sure how important a missing contact is from this chip but it can't be good surely not

[multimeter]

Re: lg 60pc45 Stanby Fault

seems this company has been playing round with it at some point, or someone has one of the chips is completely missing a contact and some of the smaller components looks to have been resoldered poorly at some point

not sure how important a missing contact is from this chip but it can't be good surely not

it may be a "n/c"pin not connected,whats the part nu?,you on about the pin with no solder on the trace side?16pin ic?

[anotherdude]

Re: lg 60pc45 Stanby Fault

it may be a "n/c"pin not connected,whats the part nu?,you on about the pin with no solder on the trace side?16pin ic?

yes pin 12 of the 16 pin ic picture of the ic is there flash has made it not readable will get the number

L6598

So looking at the pinout it's either pin 5, pin 4 or pin 12

pin 4 is rfmin

pin 5 is OPOUT

going by the orientation of the chip it's pin 12

pin 12 is VS

scrap the board and get another?

[multimeter]

Re: lg 60pc45 Stanby Fault

yes pin 12 of the 16 pin ic picture of the ic is there flash has made it not readable will get the number

L6598

So looking at the pinout it's either pin 5, pin 4 or pin 12

pin 4 is rfmin

pin 5 is OPOUT

going by the orientation of the chip it's pin 12

pin 12 is your vcc (vs)

pin 12 is VS

scrap the board and get another?

i think not,if you can find where that pin goes too,and if pin 12 is VCC then it could be your problem,and a simple bridge wire would do the trick to the correct pad.

[anotherdude]

Re: lg 60pc45 Stanby Fault

i think not,if you can find where that pin goes too,and if pin 12 is VCC then it could be your problem,and a simple bridge wire would do the trick to the correct pad.

theres no schematic/service manual for this board from what i can see, looking at it it leads to the same point as the rest of the pins on that IC, well some of them

could this be causing the no/little voltage to VA?

looking at the board again theres been multiple parts replaced or removed and checked, mainly smd components

[multimeter]

Re: lg 60pc45 Stanby Fault

theres no schematic/service manual for this board from what i can see, looking at it it leads to the same point as the rest of the pins on that IC

could this be causing the no/little voltage to VA?

looking at the board again theres been multiple parts replaced or removed and checked, mainly smd components

its possible,i dont know a great deal about plasmas to give you a solid answer,tom66 will chime in id expect, and give you a better one,but its def a problem there.

[anotherdude]

Re: lg 60pc45 Stanby Fault

i'm not sure why they removed it?

the other ic on the left lower of the board has also been removed too or replaced but the pads are all present there