Re: Samsung UN40ES6100, Power supply issue
I checked the board and found no bad soldering.
So I went back to the old board and replaced shorted fuse and cracked MOSFET (Part No: 13NM60N). It is working now. Except wifi does not work, hardwire is working.
My question is how to test the MOSFET mentioned above? I would want to check if this MOSFET on new board is working or not.
Thanks....
crabn
Member
Last Activity: 11-04-2017, 01:05 PM
Joined: 10-11-2016
Location: LOUISVILLE
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Re: Samsung UN40ES6100, Power supply issue
Sure. I will doLeave a comment:
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Re: Samsung UN40ES6100, Power supply issue
Thank you, Budm. I am looking forward to hearing from you soon....Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
Budm: Do you have any comment on this?...Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
A5V is not stable. It is bouncing between 0.002-5.2V. There is clicking sound. All cable unplugged...Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
What I did is:
Case 1: (1) Everything unplugged, (2) Plug in mainboard, (3) Plug in power cord, (4) Measured Voltage = 0
Case 2: (1) Everything unplugged, (2) Plug in mainboard, (3) Plug in power cord, (4) Turn it on using remote, (5) Measured voltage = 0-3.2V
Is something wrong?...Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
The guy at ([url]https://www.badcaps.net/forum/showthread.php?t=42434[/url]) claimed that the flickering backlight is due to bad IC9101. How do I test it?Re: Samsung UN40ES6100, Power supply... do I test it?Re: Samsung UN40ES6100, Power supply issue
The guy at ([url]https://www.badcaps.net/forum/showthread.php?t=42434[/url])...Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
It is stable at 0V if I did not press "Turn on" button on the remote. No click sound yet
It is between 0-3.2V when I pressed "Turn on" button on the remote. There is click sound now...Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
There is no physical damage to any caps...Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
Thank you so much for spending time on helping me.
A5V, B5V, and B13V measured at mainboard cable connector are not stable. Voltage changes with click sound. All cable unplugged.
1) A5V, B5V are between 0.001-5.2V
2) B13V are between 0.009-0.29V
What should I do next?...Last edited by crabn; 02-05-2017, 09:29 PM.Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
Hi Budm. I did some more measurements.
- On the old board: resistance of the DQ851 off board is 330 ohms for one side only.
- On the new board with all cables plugged in: Backlight keeps flashing. This PSU makes click sound. It won't fully turn on. Standby light is on
1) DCV at CP814S is jumping between 380 to 400 V.
2) DCV at C9110 and C9111 is jumping between 118V to 183V.
- On the new board with mainboard cable unplugged, backlight cable plugged in: Backlight keeps flashing....Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
It shows 320 ohms on one side only. The other side is over multimeter range or so....Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
I did measure the diode off board again showing 320 Ohms. I might make a mistake before. So is this diode still good?...Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
Sorry. My bad language. I corrected them....Leave a comment:
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Re: Samsung UN40ES6100, Power supply issue
Thank you Budm. The same result when I pulled the diode out for measurement.
For the other voltage measurements, I'll it tonight using your suggestionsLast edited by crabn; 02-03-2017, 11:54 AM.Leave a comment:
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Samsung UN40ES6100, Power supply issue
Hi Everyone,
I got a non-working Samsung TV UN40ES6100. It does not have any power including standby light.
There is several with power supply:
1) Fuse nearby AC inlet blown
2) Diode DQ851 shorted
3) One of the MOSFETs (Part No: 13NM60N) cracked
Then I got a replacement working power supply. It was working fine for a few hours. I tried to turn it on next day. It won't turn on any more. There is standby light. Here are some measurements:
1) Voltage at Fuse: 50 V AC
2) Voltage at C9110 and C9111: not stable 191V
3)...Last edited by crabn; 02-03-2017, 11:54 AM. -
Re: LG Smart TV flickering screen
Hi Diah,
This is the picture of backlight driver board. Can you point out where is the backlight IC on this board?
Please refer to my previous post. Do you think the backlight IC is the issue?
Thank you....Leave a comment:
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Re: LG Smart TV flickering screen
Thank you, Diah.
1) You are right. The backlight driver should be at the middle top covered with metal plate. I will take picture when I have time to work on it.
2) The screen go black when back light is off. Screen flicks when backlight flicks. When backlight is off, I can see everything on the screen with a flash light.Leave a comment:
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Re: LG Smart TV flickering screen
It seems that this guy at ([url]https://www.badcaps.net/forum/showthread.php?t=42434[/url]) got the same issue with me. He fixed it by replacing backlight driver IC on the power supply.
Can anyone point out the backlight driver IC on the power supply of TV?
ThanksRe: LG Smart TV flickering screen<br...n anyone point...Leave a comment:
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Re: LG Smart TV flickering screen
Here is a picture of back of power supply. I do not see any loose soldering or bad caps. Can anyone help with the location for grounding on mainboard and power supply?...Leave a comment:
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