Re: Technika 32'' bottom half of display grey
I just tried to measure some voltages around the display driver board and its now gone white with a one inch blue band across the middle ????
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Last Activity: 06-16-2020, 01:05 PM
Joined: 08-04-2013
Location: devon
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Re: Technika 32'' bottom half of display grey
this is the screen now...Leave a comment:
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Re: Technika 32'' bottom half of display grey
Having trouble attaching photos, could it be the led driver board ? It says its a Samsung LTA320AP06 inside the cover. Like I said the bottom half of te screen went fuzzy now completely black.Leave a comment:
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Technika 32'' bottom half of display grey
Don't quite know where to start. Power supply ? or video /logic board.Display
Any help would be appreciated. No schematics. or any other info yet.
Product code TX32J56BTCUG198 Model X32/56G-GB-TCU-UK
It started with the bottom half going fuzzy the went black now grey. !!Now its gone black. LED driver ???? -
Re: Samsung LE32A456C2DXXU line down middle of screen
Thanks for that, I think I'll keep it for spares.Leave a comment:
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Re: Samsung LE32A456C2DXXU line down middle of screen
Its about 1 pixel wide. I guess it might be cheaper to buy a new TV. So annoying !!!!
ThanksLeave a comment:
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Samsung LE32A456C2DXXU line down middle of screen
I have a line down the middle of the screen. Do i need to replace the screen ? -
Re: Samsung LE37B550A5wW Inverter MOSFETs dead short
Sorry about delay in replying for all your helpful advice. Kept on going round in circles with this one. Replaced bridge rectifier and the NTC. Didn't blow the 6.3 amp fuse this time. Still blew the 3.15 amp fuse. Getting expensive, bought another board £40.00. Now working fine.
Thanks everyone for your help. Will stay with this forum. Brilliant.Leave a comment:
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Re: Samsung LE37B550A5wW Inverter MOSFETs dead short
Thanks
I do have a multimeter and a scope. The Mosfet QP801S does not appear to be short cct or the bridge rectifier. I will replace the bridge and the NTC, remove fuse FM802S and power up and see what happens.Leave a comment:
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Re: Samsung LE37B550A5wW Inverter MOSFETs dead short
Replaced the transistors,diodes and MOSFETs .Powered up and the 6.3A fuse blew and the NTC NT811S. Checked for shorts and can't find any. Components I've replaced are OK and the 3.15A fuse. No shorts on the two MOSFETs Q1820,1821. Shall I change the bridge rectifier and the 150uF cap CP815. Strange no shorts? Unless something blew when I first replaced Q1820,Q1821 ?????Leave a comment:
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Re: Samsung LE37B550A5wW Inverter MOSFETs dead short
Thanks again. Just removed all the diodes and transistors found one diode and one transistor open cct. Had weird readings around that bit of the cct.Hopefully new bits arrive tomorrow and that will fix it ????Leave a comment:
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Re: Samsung LE37B550A5wW Inverter MOSFETs dead short
Thanks for that. I'm trying to source the 4 diodes KDS184, would BAV70 be OK? They are 85V 200mA High Speed switching diodes.
Will post when Ive replaced the diodes and trannies.Leave a comment:
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Re: Samsung LE37B550A5wW Inverter MOSFETs dead short
Is that PFC out? Cant find PFC B+ on schematic.Resistors round the two Mosfets test Ok.Leave a comment:
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Samsung LE37B550A5wW Inverter MOSFETs dead short
Mosfets on board BN44-00262A have gone dead short. Replaced the two FDPF7N5OU (QI820 QI821) with other mosfets as these were not available. I used FDPF8N50NZF with a better spec and these blew after about 1 sec and took the main 6.3A fuse out as well as the 3,15A fuse which had blown originally. Have i lost drives or something? Any help would be appreciated. -
Re: Samsung LE37B550A5W Dead
Will this blow the 2 MOSFETs QI821 and QI820 and cause them to go short cct?
Replaced FDPF7N5OU with FDPF8NONZF as the first one is obsolete. Blew the 3,15A fuse and the 6.3 A after about 1Second.Cant find ay other shorts on the board....Leave a comment:
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Re: New Members - please post your introductions here
Hi All
My name is Dave
I have been in electronics since the age of 15 .I'm now almost 65. Served in the ROYAL NAVY for 24 years. Now working for a company making electric fencing. Hoping to get some help with no schematics on fixing a Samsung 37" TV power supply !!!Leave a comment:
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