Re: LG PDP42v7
Nobody knows the LEDs indications ?
Dpacro
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Last Activity: 01-22-2011, 11:28 AM
Joined: 12-20-2010
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LG PDP42v7
I was wondering if anyone of you know the status leds of the controller board.
LED D1 D2 D3 D4 D5
When i power up the TV it shows D3 D4 D5 in Green then LED d5 closed after 2 sec. LED D1 and D2 are never on.
I tried downloading the service manuel but they dont say anything about the leds.
Anyone can help ?
Thank you -
Re: Viewsonic fixed but I do not understand
i do not know where to find the schematics for this TV
Anyone can help ?Leave a comment:
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Re: Viewsonic fixed but I do not understand
Its what i want to find out.... but I do not get it. I will definitely replace the fuse by a real one this week.Leave a comment:
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Viewsonic fixed but I do not understand
I have got a viewsonic n2751w that had no picture.
I found out that the inverter board had a blow little tiny fuse on it a 0.75A 76V.
I also traced out the source of the problem.
One 5V feed that was comming of the controller board was shorted on the inverter board direct to the ground.
I have located a resistance marked with a 0 on it. I think 0 means 0 ohm . They are used to jump but why do they jump a 5v line to the ground ? Does it make any sens at all ?
look at the picture i have pointed out the problem.
because...Last edited by Dpacro; 12-27-2010, 10:21 AM. -
42 LG 42V7 series EDTV ZSUS Problem
Hi there folks,
I was just repairing a LG plasma EDTV that I just put my hand on recently and i have found that the Zsus was defective. So I went on and unscrewed the board from the back of the TV and I tried to pull the IC out of the board because it has shorted (open ) connection IC CHGND had continuity with all SUS_UP_OUT and SUS_DN_OUT and ER_UP_OUT and ER_DN_OUT.
So I decided to extract the IC from the board . IT was a real pain because I did not have a powerfull enough soldering iron since im use to small job. I have to take a heatgun plus alot of time and little... -
Re: Viewsonic Optiquest Q19wb
I used 1N4007 diode . I know it wasn't very durable. But i least it showed me that the monitor will work with the good bridge rectifier replacement.
Thank you for your help.
This forum is very helpfull and is filled with alot of good trick and tips.Leave a comment:
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Re: Viewsonic Optiquest Q19wb
Hi , i have done few tests and I replaced all the caps with nichicon products and i found out that the bridge rectifier was defective . I have built a temporary bridge rectifier with 4 diode and the screen was working fine untill shut it off and put back the monitor together and the problem was back. The bridge is defective again.
Is there any special with this bridge FL406 828V ???
Maybe the diodes wasnt strong enoughLeave a comment:
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Re: Viewsonic Optiquest Q19wb
Those that i have bought from here in Montreal from a local electronic supplier call access o tronik inc are capacitors : gemcon and sitecl , not sure, i cant even read the name on the caps...
I also have some rubycon but none that i need.
I do not know any other place other then that place to get good quality electronic parts. So far i always ordered online for other parts but for caps i didnt really pay attention to the quality. I tough caps were just caps.
What do you recommend as a good brand where to...Leave a comment:
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Re: Viewsonic Optiquest Q19wb
Meterman CR50
Capacitance and resistance tester.
[url]http://www.tequipment.net/WavetekCR50.html[/url]
I just bought it cause with my standar multimeter it was a real pain in the xxx to check the capacitors,Re: Viewsonic Optiquest Q19wb<br /> ...he capacitors,Re: ViewsonicLeave a comment:
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Re: Viewsonic Optiquest Q19wb
What do you mean by changing them ALL ?
I have taken the cap one by one and tested them with my meterman capacitor tester and i have only replaced the one that had defective reading...
Will you suggest that some of the caps might give good reading but keep failing under stress of work !
Leave a comment:
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Re: Viewsonic Optiquest Q19wb
Hi guys,
I have 2 of these Screens here,
They at first had no power. After replacing 2 caps both c818 and c815 they came back to life BUT
They show picture for around 2 or 3 seconds then turn off.... ligh goes standby.
Then i press power and the screen goes on for 2 - 3 seconds then goes back off ...
Would it be such as a transistor problem that cut the on/off source from staying ON ?
Im stuck with this repair and i do not know what to test now.
Any idea ?Leave a comment:
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