Hi guys trying to repair a 42 inch Samsung 42" LCD TV. I opened the tv and there was 2 1000uf 16v caps bulging so replaced them. I then plugged tv in with no standby light so checked fuses. Both the fuse in the plug and the fuse on the PSU had blown already. I replaced the fuse in the plug and put a new quick blow 6.3 amp fuse on the PSU. As soon as tv was plugged in the fuse on the psu popped. Was i right to replace with quick blow ?
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Re: problem with 42 inch samsung lcd
More likely that there is shorted circuits on the board. What is the P/N of the power supply/BN44-XXXXX? Model number of the TV?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: problem with 42 inch samsung lcd
This help ? ThanksAttached FilesComment
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Re: problem with 42 inch samsung lcd
BN4-00134A, see the diagram attached. Can you read schematic?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: problem with 42 inch samsung lcd
No not sure about reading schematic. Is it anything particular that could be causing the fault meaning is it common ?Comment
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Re: problem with 42 inch samsung lcd
Check those components for really Ohm readings, also see if the other fuse is also blown.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: problem with 42 inch samsung lcd
sorry i took so long getting back to you budm, im not sure how to do that. could you advise ?Comment
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Re: problem with 42 inch samsung lcd
i was looking closely on the board and noticed that NT801 is burnt out on the board.. could this be the cause of the problem ? and if so what exactly is NT801. just looks like a little disc inside plastic coating on 2 legs.Comment
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Re: problem with 42 inch samsung lcd
Anyone ?Comment
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Re: problem with 42 inch samsung lcd
NT801 is a thermistor (in rush current limiter) prevents large currents from flowing when the TV is first turned on, since this is blown as well as the fuses you will need to check components on the circuit board for shorts, I suggest that you post clear pictures of all the boards in the TV, this is a starting point to get people to help you.Last edited by MisterD; 11-11-2014, 08:30 PM.Comment
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Re: problem with 42 inch samsung lcd
i just ordered a new PSU hoping it will do the trick
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Hi I wonder if anyone might be able to steer me in the right direction. I have this Samsung UE46ES8000 TV and it went bang during use. The main fuse on the PSU board is open. I've checked every diode/mosfet/transistor I can see and nothing appears to be short to cause the fuse to go. The DC output of the bridge rectifier is not short either. I've seen online that some of these models are known for having their PFC mosfet or other mosfets shorting and blowing the fuse but i'm not seeing that here. If anyone aware of these models having any issues to cause this? I'm reluctant to just replace the... -
Hello everyone,
I got a Samsung The Frame 55 inch TV for free from uncle cause it is not turning on anymore. I am in the second year of training as an electrician so I have knowledge already but I am far away from to be a pro.
The TV has Standby but ist not turning on. A Friend of mine owns a 50 inch Frame TV so I checked the One Connect Box and the One Connect Cable there. Both are good and working normally. I have opened the TV case and measured some voltages on the Board.
What I already found is that the 12.8V are not an the connector to the main board connector to the power... -
I bought a dead motherboard, and connected it to this PSU,
Was checking the standby voltages on the motherboard, and, whilst doing so, the PSU made a loud bang with a flash of light.
So now i truly got a bang for my bucks, and something else to try and fix.
The fuse was blowen, and the top was blowen off of a TNY276PN chip
The glass fuse didn't have any marking to say if it was fast or slow blow
So i checked the marking on the PCB thinking that that would tell me,
but it 's got a T/F8A printed on the board
So should i get a fast blow fuse, or should... -
Hi everyone so sorry my bad english Im hungarian
so I have a few samsung qe50q60tau and I trying to repair t con problem, I have a 100% working main board 100% working psu for the tv for another tv I replace them boards for the wrong tv and the problem was same so the problem not the main board and not the psu, the back light is working
I turn on the tv the qled logo is blinking turn on and off the tv I tried to tape the t con cable and I found the right pin for the tv is stable turned on but no picture, no qled picture only back light and not arrive the currrent for the t con board... -
Hi I need help with a Samsung un43nu7100 BN94-13191C/BN41-02635A with boot loop problem even with tcon jumper.
I've already try tape method and same happen, if I disconnect both flex from mainboard to panel tv boots normal even I hear Samsung sound.
When I solder jumper to make t-con work with or without panel or panel cables connected it still reboot or power cycling.
What I noticed is that there's no voltage in VHG, HAVDD, PANEL_3.3V, AVDD_17V or 12v near dc-dc chip.
I check capacitors and diodes and didn't find any short IN MAINBOARD.
Measured all power supply...
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