Re: Proscan Plded3996a-c2
I Just tried to see if the led strips would light using a small tiny H.V.inverter from a colored cold cathode tube for PC Modding, that feeds itself from a pc psu at 12V,
regardless of the horrible /Black-brown states of the back of those LED Pcb strips, they flicker and all do light up (not brightly but they do turn on with the little inverter), Ill heat sink them to the large metal backing before I close it all up using a potting / thermal paste adhesive... WHY the hell didn't they do this at factory the tube costs like $2.14 on ebay sigh.
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Last edited by _N_; 04-03-2015, 11:11 AM.
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Re: Proscan Plded3996a-c2
I was extremely careful in removing everything ,
Curiosity killed the cat, I know,...... I know
But looky looky
ECD029 IC-E-CNA039d139...
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Re: Proscan Plded3996a-c2
I left it on for 10 min this mourning and remeasured and now i get slightly different voltage.
1: 12.4
2: 0
3: GND
4: 0.04
5: 0.01
6: 3.6 - 0.60 this one fluctuates
7: 2
8: 2.4
voltages off the main 2 big caps is v164,
also the cap near for the inverter v20.9
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Re: Proscan Plded3996a-c2
New part arrived and soldered it all in , no bridges now i get these voltages all measured to Ground pin of the IC. and still no BL helllllp ? ;}...
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Re: Proscan Plded3996a-c2
Part ordered last night, when it arrives ill install and upload pics, it will be a while since no one stocks it other than the people who make it.
Thanks Bud for the help, ill keep ya posted.
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Re: Proscan Plded3996a-c2
k, off to purchase one.
anything else you'd like to verify by chance?...
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Re: Proscan Plded3996a-c2
yes its in my 1st posting, top of thread along with all the other data sheets.
pin 1: {V.in} gives 12.4V...
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Re: Proscan Plded3996a-c2
20.8vDC without led connector plug...
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Re: Proscan Plded3996a-c2
Also Ive read on here so long that capxon zapxon and every thing that ens with Xon in it is so bad I pulled all the Elctros caps and all were within there UF rating, I have a separate Cap meter (the joys of Ebay :.}.. )
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Re: Proscan Plded3996a-c2
At that 100V 100uf cap it gives me 20.8v dc, with probes placed directly pn the 2 legs of the 100uf 100v and meter set to DC AND thats with Every cable to the main board currently connect.
If you need a voltage test on something, id be happy to....Last edited by _N_; 03-13-2015, 09:07 PM.
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Re: Proscan Plded3996a-c2
the 2 stacked diodes theres browning on the pcb from the heat, I did also pull those earlier and checked them to see if they were fried and they measured off the board like diodes....
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Re: Proscan Plded3996a-c2
no no before, when i was testing them off board. None were shorted and all showed up with there diode symbol....
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Re: Proscan Plded3996a-c2
im pretty sure its a Z-diode cause the tiny number can be read and goggled what it was.
4.4 1 way and 4.8 the other...Last edited by _N_; 03-13-2015, 08:43 PM.
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Re: Proscan Plded3996a-c2
Just retested same reading at the cap legs of the 100uf 100v 20+v
the diodes tested good i pulled them off board to test.
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Re: Proscan Plded3996a-c2
None of the 3 contact points beep on my meter, I tried in every combination.
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Re: Proscan Plded3996a-c2
See. In the 3rd pic I took, where you see the voltages of the backside of the board in red ,
Under the N channel Fet
theres 2 tiny little 3 pin SOT-23 ( i think) Smds .
1 is 3pin NpN and checks good the others a 3 pin Diode and
Theres 1 tiny Zdiode (gives voltage both ways)
these are by the inverter ob3350...Last edited by _N_; 03-13-2015, 08:10 PM.
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Re: Proscan Plded3996a-c2
Those red and black wires disappear into a little slit in the caseing under the psu/inverter. the whole tv must weigh like 15 lbs max lol.
I think there just connected to the led strips inside, I didnt want to dismantle the complete thing in case a break the screen,limited work space.
BUT if its required, NP. needed?
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Proscan Plded3996a-c2
Man there's nothing in these Tvs these days wow tiny little boards compared to the Sammy. This one ill keep to turn it into a led monitor for the pc :P
Symptoms Are :
Tv red power led turns on when plugged in, Once power for the remote is pressed led becomes Blue and remains. No back-light Leds come on at all, not even a flicker.
Ive checked the through hole components in the pics they have dots, all seem to register on the little trans tester as what they are, none burnt.
In the pics ive tried to take readings, I can already see
"Bud, typing...
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