Re: LG 42PT350R Clicking Array
ok
so replacing igbt and drivers on both boards wil work? by the way short is present when y sus is disconnected from z sus. so zsus seems shorted again because of y-sus ? hmmm.
What i understood from your guidance:
Need to replace igbt and drivers on both boards at once? how to check if everythings fine before turning on?
Thank you Tom Once again!...
chaplu
Member
Last Activity: 03-19-2017, 02:32 AM
Joined: 03-01-2014
Location: Gurgaon
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Re: LG 42PT350R Clicking Array
so that means to replace again igbt and mosfet drivers as well? again n again ?
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Re: LG 42PT350R Clicking Array
Its short between vs, er and gnd.
This should be done on diode mode on multimeter with tv having no power right?Leave a comment:
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Re: LG 42PT350R Clicking Array
Hello Tom,
I will check the short between VS and ERC, for now i found that when i turn on removing cable between z sus and power board it looks like tv turns on without picture and sound but red light goes as if tv is on, and works with remote fine.
removing cable between z sus and y sus and letting power connected to z sus do the similiar clicking thing on and off.
One more thing i tested is when i turn it on i get 5v but i don't get vs or va on z sus if that helps.
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Re: LG 42PT350R Clicking Array
Thank you for reply!
none as i can see. Replaced igbt's and driver on z-sus as per you suggestion and a diode as well....Last edited by chaplu; 09-04-2014, 11:31 PM.Leave a comment:
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Re: LG 42PT350R Clicking Array
Bump once again, Kindly help out guys if you can. Thank You!Leave a comment:
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Re: LG 42PT350R Clicking Array
Bump, forum goes too fast....Leave a comment:
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Re: LG 42PT350R Clicking Array
Hello Tom,
Sorry was busy with my work, bought another tv for the time being but still i want to fix this tv. I already replaced the driver ic as well as igbt's and one zener, set still clicks if i remove the power cable from z sus and let it stay connected to y sus. it turns on but no picture, i mean red light goes on and off with remove.
What to check now.
Thanks & Appreciate your help!Leave a comment:
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Re: LG 42PT350R Clicking Array
Yea we do have market here near by. Can get most of the things here. But unfortunately i wasn't able to source 73711 IC here. Is there any substitute to it. Also is it possible that driver ic are not bad its just the zener diode?
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Re: LG 42PT350R Clicking Array
Alright, Will report back tomorrow when i will get the parts and done with my testings.
Thanks Tom for attentive help.Leave a comment:
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Re: LG 42PT350R Clicking Array
set runs fine without z-sus connected with no picture. but y-sus is getting power from z-sus.
So should i assume y-sus is ok?Leave a comment:
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Re: LG 42PT350R Clicking Array
Ok, I will do. Do i need to check smd resistors as well? or the big one only. I didn't check y-sus board but will have a look on it as well.
If IGBT on y-sus is ok, should i go ahead and do further testing on y-sus?
Edit:
Just tested IGBT on y-sus and they seems ok.
Checked zd2 and it is bad (shorted) zd1 is ok though. One more thing to mention is RD2004 shows continuity on each pins vice-versa on z-sus board whereas it shows continuity only on two pins on y-sus is that ok?
Thanks once again...Leave a comment:
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Re: LG 42PT350R Clicking Array
yes solder marks on them. Ok I will do that. Do i just check resistors and call it done if all ok? or need to check anything else as well? I don't really see the ic number on them it is something like x813 and below that it says 73711 etc. What might be the ic number.
Thanks for the help Tom. Much Much appreciated.Last edited by chaplu; 03-05-2014, 10:42 AM.Leave a comment:
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Re: LG 42PT350R Clicking Array
Here's back side pic
Thanks...Leave a comment:
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Re: LG 42PT350R Clicking Array
Hello Tom,
Could you help me locate driver IC?
ThanksLeave a comment:
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LG 42PT350R Clicking Array
Hi,
I have 3 years old LG 42" PT350 tv. Which recently started making humming noise and eventual failed to turn on. It only clicks and then go back to protection mode then clicks and so on. I checked va vs on power supply they are within specifications which is va 55v and vs 203v. So power supply seems ok. when i remove the z-sus board from power supply tv turns on but without any picture which is expected.
So removed z-sus and found two 30F124 shorted. Replaced them and reassembled again. Turned it on to find that symptoms changed a bit. It was clicking with... -
Re: LG 42PT350-UD .AUSLLHR Plasma - Dead
hello kevin did you find any solution to it? it seems zsus on my tv having same issue as well i can see two 30f124 but can't tell if they are bad. since there's no physical damage. Any help would be appreciated.
Thanks...Leave a comment:
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Re: LG 42pt350 A little help.
Hello Guys
This is my first post in here. So hello to all of you. I have the same model LG pt350r that is having same symptom which is clicking sound and no turning on. When i unplug z board i can turn on tv without picture or sound but i can see that remote works and just like it used to turn on it does one relay click and then little humming of running tv. Any help would be appreciated.
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