Re: Alba lcd32880hdf
If you had 24V before make sure all your jumpers are in place like the ones for STBY ON/OFF...
If you had 24V before make sure all your jumpers are in place like the ones for STBY ON/OFF...
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Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: Alba lcd32880hdf
tom if i use the jumpers on
pin 6 STBY_ONOFF
pin 8 BL_ON/OFF
pin 10 B_DIM
pin 14 +5VSTBY_2
then i only get 5v from the blue wire and no 24v
if i use a jumper on
pin 6 STBY_ONOFF
pin 8 BL_ON/OFF
pin 10 B_DIM
i get 24v on invertor but the blue cable is 0v
i can short the backlight to come on but it just flickers using
pin 6 STBY_ONOFF
pin 8 BL_ON/OFF
pin 10 B_DIM
pin 12 +12VComment
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Re: Alba lcd32880hdf
I'll try and have a look at this tomorrow. Bump up the post if I forget.
I do remember when I jumpred the backlight on the 26" 17PW25-4 it flickered for the first 3 seconds... I think it wanted to stabilise the output first which the main board would normally wait for.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Alba lcd32880hdf
ok thanks m8Comment
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Re: Alba lcd32880hdf
OK, so to confirm, the backlight is flickering continuously? What is the 24V doing? Is it stable?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Alba lcd32880hdf
i can short the backlight to come on but it just flickers using
pin 6 STBY_ONOFF
pin 8 BL_ON/OFF
pin 10 B_DIM
pin 12 +12V
yes the 24v is stable i can only get the backlight to flicker by touching pin 12 with a wire ,if i leave the wire in pin 12 then it trys to start backlight but it fails so i have to keep shorting pin 12 to make the backlight flickerComment
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Re: Alba lcd32880hdf
What about if you also connect pin 28 on the connector going to the main board?
This is by far and away the most complicated backlight jump I have ever seen, it is usually very simple, I cannot think why it would not work.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Alba lcd32880hdf
just to confirm im doing the correct pin sequence tom ?
via picturesAttached FilesComment
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Re: Alba lcd32880hdf
Could always be bad back light ccfl? or Inverter transformer?Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Alba lcd32880hdf
already tried another invertor luckily i had a spareComment
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Re: Alba lcd32880hdf
ok again tom thanks for your help ill leave this for a rainy day got my latest project bought 4 days ago PHILIPS 47PFL7603D/10 for £30 supposed to keep cutting out but still waiting for this to happenComment
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Re: Alba lcd32880hdf
Some people seem to have had problems and success with changing the high voltage blue caps see here
http://www.tv.quuq.org/forum/index.p...e;topic=5167.0Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Alba lcd32880hdf
yeah thats a different psu with the built in blue caps that runs the invertor ive changed them before and fixed this but this tv is a different version with the invertor board seperateLast edited by sordids999; 12-07-2013, 06:57 AM.Comment
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Re: Alba lcd32880hdf
I can't remember which is pin 1, to check you would need to find the 5 grounds which hang off pin 1, for some reason Vestel have seen fit not to label it!! Ugh.!Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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I suppose the real question is whether the existing pinouts from ether a 17IPS71 psu are cross compatible with a 17IPS12 psu? If they are then the exchange of the main boards should have no issues providing the screen is compatible with both main boards. Obviously you can change the screen configurations easily enough (providing you have the correct files) for the main board. Why may you ask would I do this? Well a lot of the smart features are no longer working on a Hitachi 48HBT62U main board I wish to give it a new lease of life!
Obviously the same LVDS connector for the screen connection... -
Hi and thanks in advance for any input you might provide!
I have a Sceptre U550CV-UMRD8POTV83BB 4K LED (this is a dumb tv) that I bought new in August 2021, so It's just completed 3 years.
Main power board model: TP.MS3683.PC821 T-Con board: N4TP546UHDPU2L_BO
Last Sunday I was watching a dvd and fell asleep for about half hour, when I awoke the tv screen was black and couldn't get the dvd menu to show, so I changed the input to antenna and had sound but no picture, turned it off. I then got online and found this great site! ....read many troubleshooting tips and this... -
Hello guys,
I have a Philips 240B7QPJEB. The monitor seems completely dead.
I opened it and measured the voltages of the powersupply. I found that a mosfet was dead and replaced it.
On the connector, that goes to the TCON board, all voltages 15-19V and 5V are present.
The small connector on the left of the PSU has two cables with 18V and all the other have 0.2V. It connects on this small connector on the left ontop of the panel. I guess the backlight? Seens fine I guess.
The weird thing is, that the Power LED is powered over the TCON board.
On The TCON...12-28-2024, 02:12 PM -
Hi everyone,
I’m looking for help with a persistent issue on an LG TV model 55NANO77SRA, which uses the main board EBU66792103 (also used in LG UQ80 and NANO75/NANO80 series).
🧩 Problem Summary:- The TV keeps scrolling through the menu or selecting items by itself.
- I removed the physical button board (the entire panel with power and volume buttons) and also disconnected the flat cable (CN202) from the main board.
- The remote control is not in use (batteries removed), and the TV still shows the same behavior.
- I
07-28-2025, 08:34 AM -
Hi everyone,
Im looking for some advice regarding my Samsung UE55MU8000 TV with main board model BN94-11606C. The TV suddenly stopped turning on and now shows no signs of life at all not even the standby light at the bottom.
Initially, I suspected an issue with the PSU, so I took it to a repair center. They tested it and confirmed that the PSU works perfectly, even on other TVs. Based on that, I started investigating the main board.
I disconnected the main board from the PSU, and the backlight turned on, which seems to confirm the main board is the issue....
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