phillips lcd keeps blowing fuse

[TimT]

Re: phillips lcd keeps blowing fuse

about the diode. it was not installed in the new board but was in the old. I left it out untill i tried the new inverter. when that did not work i pulled the diode from old board and installed it. but that did not seem to do anything

[TimT]

Re: phillips lcd keeps blowing fuse

looking closer at the board installed it has a large cap then the old board did not! boards seem the same.the hole for that cap is on my old board but never installed! assuming this board can work for other models. a guess a " generic board " that can be setup for different tv's. also another cap is installed on the new board. i think i can setup the new board just like the old one. strange it seems this board as is has the correct output.

painel# LTA400HM01

old board A01PNMPW 05810P00557
New board has no sticker ...... BA01POF01035

[TimT]

Re: phillips lcd keeps blowing fuse

tried that with no luck. will check panel#

[MisterD]

Re: phillips lcd keeps blowing fuse

I noticed that my inverter board is not using the small connector with the 2 wires, one black and one white, like yours has. I wonder if your backlights would stay on if you left that small connector unplugged?

[MisterD]

Re: phillips lcd keeps blowing fuse

its the same... I left out the 0

Ok, that's the bare board number, mine has white stickers but they don't include a barcode and the numbers I have are probably Emerson. Do you see the white sticker with barcode on the chassis itself? That is the Panel Manufacturer and Panel Number, mine is Samsung LTA400HM09

[MisterD]

Re: phillips lcd keeps blowing fuse

it says the part i got works with Philips LC407SS1 I have Philips 40PFL3505D/F7. The board look the same. same voltages printed on the boards are the same. the only difference that i can see are the diodes on the new board are larger " physically " around the bridge. im thinking about swapping them out. cant do no harm I can always use one as a core. MisterD I just dont know what to test on the power board. seems output is correct

I doubt swapping out those diodes will do any good, I agree the output voltage is all there on your power supply, it seems that the inverter board is shutting down as soon as the backlights turn on.

[TimT]

Re: phillips lcd keeps blowing fuse

its the same... I left out the 0

[MisterD]

Re: phillips lcd keeps blowing fuse

MisterD your board is the same as my orginal board " ba01p0f0133 "

Mine is ba01p0f01033

[TimT]

Re: phillips lcd keeps blowing fuse

MisterD your board is the same as my orginal board " ba01p0f0133 "

[TimT]

Re: phillips lcd keeps blowing fuse

it says the part i got works with Philips LC407SS1 I have Philips 40PFL3505D/F7. The board look the same. same voltages printed on the boards are the same. the only difference that i can see are the diodes on the new board are larger " physically " around the bridge. im thinking about swapping them out. cant do no harm I can always use one as a core. MisterD I just dont know what to test on the power board. seems output is correct

[MisterD]

Re: phillips lcd keeps blowing fuse

I have a 40" Emerson with a cracked LCD Panel/Screen,it powers on with everything working, I can actually make out part of the picture on the screen, it was given to me and I have not disassembled it as of yet, attached picture of chassis with back removed, it appears to be very similar to your philips, I believe that Philips/Magnavox and Emerson are all made by the same Company, I'm wondering if there are any voltages I can check on mine (working) to compare with yours (no backlights) that would actually help in your diagnosis, maybe Bud or Tom can advise.
The middle darker picture is the sticker for the LCD Panel.

[selldoor]

Re: phillips lcd keeps blowing fuse

Doesnt matter which board you ordered when you plug it in it should not go Bang.

UNLESS you had it standing on a conductive surface?

In any case its says both are compatible with your set. Power boards - if the connectors are right ar less fussy than main boards.

EDIT

By the way did you read the service note - does your board have that diode?

[TimT]

Re: phillips lcd keeps blowing fuse

That may be it! ordered this part. http://www.encompassparts.com/item/8...on-returnable) should have got this.
http://www.encompassparts.com/item/8...wer_Supply_Cba

all the voltage out of boards are the same.. did not see the YA1/YA3 in serial #

[TimT]

Re: phillips lcd keeps blowing fuse

bulbs seem to be seated tight!

[TimT]

Re: phillips lcd keeps blowing fuse

MisterD I still have the old board I will check the stickers. DJtech you are correct. This is more of a hobby to me I dont do this for the money.

I pulled the inverter board and reinstalled with inverter " contact clips " resting on the plastic fittings. then installed the mounting screws. this way the inverter was not in contact with the bulbs. tested this and the same issue..so im lost! pulled T-con & tested still the same. pulled cable from inverter and retested BL_sw jumps to 3v when blacklight " should kick in "

[MisterD]

Re: phillips lcd keeps blowing fuse

I put the inverter and t-con back in and attached power. I can confirm the all bulbs do light up. still a quick flash of light

Can you see where the bulbs plug into their sockets? maybe one or more is not seated all the way in?

[MisterD]

Re: phillips lcd keeps blowing fuse

Okay, originally you had a power supply problem with it blowing the line fuse, you replaced the power supply board, do you still have the old board? please verify that the white barcode stickers match on both boards, these stickers are the correct part number, the number on the actual board is the part number of the bare board without any components, I'm just wondering if you have a replacement power supply board that mounts and connects and looks the same but could be different in some respect and is causing then inverter power ( high voltage to shut down) I may be wrong but it doesn't hurt to check it out, also has anyone else worked on this set prior to you? Make sure your replacement inverter and power supply boards are in fact the correct ones.

[Dgtech]

Re: phillips lcd keeps blowing fuse

You started working on this TV exactly a month ago. A lot of man hours went into this thing and it's only a 40 Inch LCD TV. I know it's hard to give up on things but there are a lot easier repairs out there just waiting for you. Set this one aside and move on, if you can. I've even put them back together and sold them as non working sets the same way that I bought them off of CL. I would end up getting the same amount of money that I bought it for in the same condition. Minimize your losses.

Like I said before, there are a lot of easy repairs out there of larger TV's. You will do fine with those.

[selldoor]

Re: phillips lcd keeps blowing fuse

Pretty certain the answer is NO. The lamps usually run at something like 1200vAC
provided by the inverter transformers. - If you meant to power the inverter transformers?
the answer is still no. You can get bulb testers - (basically an inverter) or even an inverter board on ebay - but I am not sure if they will power those tubes as they will be quite long?

[TimT]

Re: phillips lcd keeps blowing fuse

can I hook up a 9v battery to test the lamps?