Re: Panasonic Th-42A400z led tv
Ok so i have found these 2 boards are available but the question is are they replaceable?
lambchopsnz
Senior Member
Last Activity: 07-17-2021, 06:52 PM
Joined: 07-03-2016
Location: New Plymouth
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Re: Panasonic Th-42A400z led tv
ok so today i tried the boards from my dead tv in the good tv and they all work so im left with it being the panel..Im guessing the 2 boards at the bottom of the panel are attached and not replaceable? Is this whats meant by the panel. I did test the led in the good tv and have the same reading as the bad one which rules out the leds right?
well if no other options i guess i have a few spare boards..Leave a comment:
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Re: Panasonic Th-42A400z led tv
Yes or ending up with 2tvs that dont go lol
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Re: Panasonic Th-42A400z led tv
Hi yeah i did try following the test diagrams and my voltage tests point to a faulty LD board but trying to source one of these isnt proving the easiest well i found the boards but i dont want to pay around $70 shipping. I have another tv exact same model working so i might try the board from that before i pull the screen apart or order a board..i just have to wait for the missus to go away so she dosent have a fit lol.
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Re: Panasonic Th-42A400z led tv
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Re: Panasonic Th-42A400z led tv
ok looks like i had the wrong wire pairs so i managed to test the 2 correct pairs of wires in the dark and could see the glow through the back panel the first pair reads 43.9v and the second pair 65.5v is this likely to be bad leds...Leave a comment:
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Re: Panasonic Th-42A400z led tv
Yes i used the diagram from the test manual from earlier in this post to determine which were the right pairs of wires so i figured it was the 2 outside orange and black and 2 inside red and brown i did try red black and orange brown also but same result.Leave a comment:
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Re: Panasonic Th-42A400z led tv
Hi guys im back, I got myself an led tester and plugged it into both sets of leds but the voltage stayed at 326v on both of them which is what it sits on when just the power is plugged into the tester. So im not sure what this means next..does this mean they are good or bad or bad test..any suggestions appreciated.
thanks.Leave a comment:
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Re: Panasonic Th-42A400z led tv
Hi Guys thanks for all your suggestions so far so ive got to the point where i need to test the led strips. One of those led testers is about $50 if i buy from ebay or over $100 local,my question is do i still need to pull the screen apart to test the strips or can i test them somehow without spending lots, i do understand if its a strip i need to pull the screen apart anyway.
Im just looking for an easyish solution.
Unfortunately or fortunately i guess im booked in to have eye surgery for glaucoma on the 4th July so wont be a lot happening...Leave a comment:
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Re: Panasonic Th-42A400z led tv
Hi I tested both C7813 and C7817 with the LD2 plug removed and yeah the voltages did jump up to close to each other.
NickLeave a comment:
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Re: Panasonic Th-42A400z led tv
Ok it turns out you cant edit posts even though it says edit it wants to create a new reply so here are the pictures the way i first intended on uploading them i hope...
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Re: Panasonic Th-42A400z led tv
I tested the two caps again before I took the board off and yeah the top one got to about 39-42v while the bottom was about 87v so definitely a difference hopefully these pictures will help they are taken as though the top screws have been removed and the board hinged down on the bottom ones if you understand that lol
Cheers
Nick...Leave a comment:
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Re: Panasonic Th-42A400z led tv
I tested the voltages on the 2 caps suggested the top one c7813 the voltage got to about 37v the bottom one c7817 i believe 101v was the highest i saw but its that quick its hard to be accurate.Leave a comment:
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Re: Panasonic Th-42A400z led tv
Thanks again for your help I tested the voltages at SRV-VLED1 and 2 With both reading 32V.
How Hard is it to disassemble the panel for a first timer how many layers are we talking?..
I guess the tv cost nothing and its not going so i guess worse thing to happen is it still dosent go right lol.
What about getting replacement strips do they need to be same number etc?
Cheers
NickLast edited by lambchopsnz; 06-17-2018, 09:37 PM.Leave a comment:
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Re: Panasonic Th-42A400z led tv
Yeah there is a flash of lights I can see through the holes in the back.Leave a comment:
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Re: Panasonic Th-42A400z led tv
OH Hell I give up on posting..
Hi RJ,
Thanks for your reply this is now my 3rd attempt at posting so its going to be short lol
I tested all points shown on those boards in post above (i couldnt edit it) the voltages were correct until the led blink kicks in where they drop to 0v except the 5.3v which dosent change.
The last picture just indicates the heated area on the board and FET I replaced (TK10A60W)
Hope to hear back with some more ideas
Cheers
NickLeave a comment:
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Re: Panasonic Th-42A400z led tv
Here's some pictures I will edit this post soon...Leave a comment:
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Panasonic Th-42A400z led tv
Ok I was given this tv and all i knew was it dosent go.. so i plugged it in and the standby light goes from green then starts to flash once every second or so,not sure if this is the same as a plasma blink.
Anyway i have found it very hard to find any info at all about this tv.
I have tested the standby voltage on the power board which reads 5.2v so im guessing close enough to the 5.3v on label but the 16v test point reads 0v as does the 35v.
I then removed the power board and discovered a heated patch on the board around one of the FETS which i have replaced but still have... -
Re: Panasonic th-p42x10z
so it is the panel thats buggered then?Leave a comment:
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Re: Panasonic th-p42x10z
well this tv went for about 5 mins with the 2 lines on the screen and not sure what i did if i just unplugged the wrong cable or something but when i turned it back on i was back to the same 6 blinks that i had with the other tv so after 9 months of this tv sitting in the spare room in bits i think i ready to give up. I think i will take the boards out and try to sell them since i believe its the panels that are the problem...lesson learnt dont play with plasmas lol
Anyone interested in the boards?Leave a comment:
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