Re: Samsung UN55EH6000F Power issue
If the PFC voltage 386vdc is steady, that means the standby circuit and the pFC circuit are working as they should.
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Re: Samsung UN55EH6000F Power issue
with power supply on, Check the voltage across the main filter capacitor CP806
This voltage should be around 165vdc in standby and go to around 300vdc when the power supply is on.Leave a comment:
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Re: Samsung UN55EH6000F Power issue
I'm now just guessing at things and tested this resistor RP820 and out of circuit it's 0.11 but I can not find a chart online that the colors work with. Under the scope it looks black, gold, black, gray, black. but this comes as an error on the calculators.Attached FilesLeave a comment:
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Re: Samsung UN55EH6000F Power issue
when you remove the jumper does the A5V stay at 5volts? or does it drop? If it drops I suspect the standby circuit is not supplying enough voltage to keep itself and the pfc circuit working.Last edited by R_J; 02-03-2022, 02:47 PM.Leave a comment:
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Re: Samsung UN55EH6000F Power issue
The first thing I would try is to connect the PS_ON/OFF pin to ground, this should place the power supply in standby mode, then you can see if the standby voltage A5V is stable.
CNM803 pin 14 is PS_ON/OFFLast edited by R_J; 02-03-2022, 01:42 PM.Leave a comment:
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Re: Samsung UN55EH6000F Power issue
What about the A5V is it changing as well?Leave a comment:
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Re: Samsung UN55EH6000F Power issue
UPDATE: Same thing. 13v then zero just keeps doing it over and over. I was looking it all over again and see a tiny crack in the big green thermister wtr15d050 but I get 8.3 ohms cold so not sure if the crack means damage or not?Last edited by CraigR; 02-03-2022, 10:57 AM.Leave a comment:
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Re: Samsung UN55EH6000F Power issue
Yep. Thanks for the number! I will order some up and get back with how it goes.Leave a comment:
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Re: Samsung UN55EH6000F Power issue
in the gate circuitAttached FilesLeave a comment:
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Re: Samsung UN55EH6000F Power issue
That looks correct, let me guess, they are in the gate circuit.Leave a comment:
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Hi all,
TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!
I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!
A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about... -
Hello Everyone, this is my first post and I am excited to be a part of such a great community. I've been reading these forums for awhile and there really is some good friendly people here. No bashing and being rude like 90% of other forums Ive been to. Lets get to the good stuff.
I have two years of college in Electronics Engineering Technology. Ive been tinkering with electronics sine about 1990. I know enough just to be dangerous, so be gentle.
Make: Samsung
Model: UN60ES6500FXZA
Power Supply P/N: BN44-00525A
Symptoms: The TV was... -
Hi all,
My Samsung TV display recently stopped working while I was playing PS4 (no storm or anything to indicate a power surge). I could still hear audio through the PS4 but no display. The TV kept trying to turn on but would turn off after a second or two.
I tried the obvious troubleshooting steps like unplugging, replugging, trying different outlets and power cords with no luck. Someone on another forum suggested that it may be a power supply issue so I purchased a replacement power supply board but that did not help. I then disconnected the main board from the...08-31-2021, 09:32 AM -
I have a vintage 2008 Samsung 50” Plasma TV, Model code PN50A550S1FXZA with a power supply part number BN44-00222A. I repaired the power supply board several years ago finding a couple of cold solder joints on the back side of the board and it's worked great up until now. Recently a fried sound occurred with the smell of burnt electronics and the TV shut down. Trying to turn it back on yielded the typical relay clicking with no TV boot up. Upon investigation, removing feeds to the other boards within the TV it was found that disconnecting the logic board from the power supply allowed the... -
I am seeking guidance on an Acer Spin 1 SP111-33 that does not turn on when pressing the power button.
Below are the observations and troubleshooting steps I have taken so far: Observations and Tests:- Verified that all critical voltages are present:
- 3.3V and 5V are always present if DC is plugged.
- 1.8V on the BIOS chip is present.
- Checked the power button functionality:
- When pressed, the voltage drops to 0V, indicating the button is functional.
- Inspected the flex cable connecting the USB, audio, and power button to JUB1:
- Confirmed connectivity is intact, ruling out issues
11-26-2024, 12:39 AM - Verified that all critical voltages are present:
Leave a comment: