OK, this tv i was able to narrow down to main, with main disconnected backlights turn on and is crisp. Started doing some testing and found out it has a short to ground in the audio section, both pin1 on ic301 and pin1 on ic 701 are both shorted to ground, will see if i can isolate the short stay tuned. if somebody has felt with this before please speak up thanks.
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Re: Samsung UN46EH500F
Please provide the P/N of those two IC's so we can find out what pin 1 is used for.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: Samsung UN46EH500F
Ic 301
NTP-74125
T200710AF
226 5
Ic701
MP222EC
23K G4 With underline
E3NKComment
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Re: Samsung UN46EH500F
Here is ic701 can't find the anything on the other yet. Closest thing i could find is NTP-8230 looks same on outside but who knows on inside.
Thinking about removing ic701 and see if short goes away.Comment
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Re: Samsung UN46EH500F
That is RS232 IC. The main board has RS232 port? I do not think that is correct.
What is the resistance reading on that pin 1 and GND?Last edited by budm; 10-18-2017, 09:02 PM.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: Samsung UN46EH500F
We need to see the pictures of the board.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: Samsung UN46EH500F
According to my fluke 75 it is 00.1 to 00.0 in ohm range. in diode mode it beeps. No it don't have a serial port perhaps i misidentified it but that is the part numbers i listed in post #3 had to use a digital microscope to see the tiny print a magnifying glass wasn't strong enough for my eyes anyhow.Comment
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Re: Samsung UN46EH500F
Well, looking at the picture of that IC701, PIN 1 (ARROW) is connected to GND plane.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: Samsung UN46EH500F
What is that black jack CN301 is for? It looks like for serial port.Last edited by budm; 10-18-2017, 09:49 PM.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: Samsung UN46EH500F
What are the Voltages on the power supply connector that goes to the main board?
Report pin names and the readings.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: Samsung UN46EH500F
Dang i should have seen that, well now that you mentioned it the other ic looks that way too
Well much to learn yet been though i should have known this. Anyhow is it a safe bet if backlights come on without main connected that the main is faulty? i probably should do some voltage readings and list them.Comment
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Re: Samsung UN46EH500F
See post 11 so we can see what are missing.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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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: Samsung UN46EH500F
Will do first thing on morning not by tv atm. However here is a video of the same tv so you have an idea of layout. However evidenced by this video this tv had several Leds out , this will be the first i ever seen with that many leds out and still turn on. I have been able to get backlights to turn on by disconnecting main will have to take a double take tomorrow as well to see if there is dark spots which i think will be hard to do with no image we'll see.
So far every led repair i've done only has 1 to 3 led out and it will refuse to turn on. This video shows tons out
https://utabby.com/en_US/video/020/K...cklight_repair Sorry here it is, lord i am going to bed lolLast edited by heavymachines; 10-18-2017, 10:18 PM.Comment
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Re: Samsung UN46EH500F
Ok yeah 2 headphone looking jacks i will look on back panel in morning see what label it has i would imagine one is input and the other is out? we'll see.
Wait what you said it looks like a serial port? next to the tuner box? The port above the fiber optic port? Never seen that type before in a microphone/headphone jack. a serial port really? i will have to look on back cover and see if it has a label for it.Last edited by heavymachines; 10-18-2017, 10:16 PM.Comment
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Re: Samsung UN46EH500F
OK, it is the serial port (service port, E-LINK). Lots of device out there use miniphone jack for serial port, it uses a lot less space.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: Samsung UN46EH500F
Ok here is voltage readings on Cnm803
pin # / Pin label / reading
pin1... B13v... 12.77v
pin2...Pwm-Dim... .077v
pin3...B13v....... 12.77v
pin4...B13v..... 12.78v
pin5...Vamp.... 12.78v
pin6... Blu_on/off .050v think this is the problem
pin7...Vamp 12.78v
pin8 Gnd
pin9 Gnd
pin10 Gnd
pin 11... B5v... 5.24v
pin12... A5v... 5.24v
pin13...B5v... 5.24v
pin14... Power on/off 3.51v
Also did the backlight check with main disconnected it does look uniformly lit so i think we're ok there.Comment
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Samsung UN55ES7003
made house call.
red power led comes on, blinks twice, no display, no backlight, relay clicks, repeat.
psu has self test feature.
disconnected from mainboard.
determined PSU ok BL ok.
suspect mainboard.
disconnecting tcon has no change on operation.
markings on mainboard:
BN97-06531P 0151
BN94-06123R
found and ordered replacement on ebay https://www.ebay.com/itm/394077328633
for 54$
second house call:
with replacement mainboard, tv turns on, has sound,... -
I hope this is the right forum to post in despite not technically being a repair, but still a question of swapping boards.
I thought I'd explore the possibility to upgrade an existing working Samsung ue55nu7096u with the logic board (and power board if needed) of a newer model (ue55ru7105k) of the same size and appearance (and resolution). The reason being I'd like the extra inputs of that board including component in, an extra HDMI port and bluetooth. Its panel is broken so I have no use for the board otherwise.
The models launched in 2018 and 2019 respectively.... -
Samsung LN46C630K1F – Intermittent Backlight, BN44-00341B Power Board
Summary for TL-DR readers:
• Backlight is intermittent, may come on with TV boot or not. No flickering, never fails during TV on.
• Have obtained Samsung schematic & service documents - Can upload if helpful.
• Have read ALL applicable threads
• C1818 and CP820 replaced as low hanging fruit
• CN802 data taken for normal and failed BL operation. SUMMARY: Pin 2 - 5vDet = 3.52 @normal, 0.0 @BL fail. Pin 6 - EPWM = 1.631 @normal, 1.058 @BL fail.
• VCC pin (18) of PFC... -
Well, just snapped the back on another piece of crap less than 2 year old Samsung after giving the customer the bad news that the lower panel driver boards have so many shorts its not recoverable. Now if your tv takes even a subtle surge it not only takes out part of your main board/tcon board it keeps on going right into those lower panel driver boards and the customer doesn't want to pay my hourly fee to find shorted caps in parallel, fried resistors, and shorted diodes. We really started to see them roll in like this in the KS,MU,NU, RU, and now QN series Samsung's it seems they are deliberately... -
Hi Team - just joined to see if anyone can offer some expertise in diagnosing an issue with a TV.
I've done a few hours googling and youtubing but just seeing if anyone has any insight here. I got a 55" Samsung UE55MU6470U which seems to boot loop and then after 10 mins will boot, work for a few minutes, then turn off and repeat.
Whilst it's on into the normal Samsung menu/boot screen it looks perfect - so I can't see there being any screen issues. I've seen lots of videos with taping across clock lines to diagnose which particular one may be an issue but i don't...
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