Mobile Phone LCD Screen Quality Control Expert

repair samsung lcd tv -relay clicks, shuts off, won\'t come on

by:Kimeery     2020-03-25
DISCLAIMER -
If you are trying to repair your own device, it is expected that any warranty that may still exist will be canceled.
This is your own responsibility if you do additional damage.
Also, you are using a device that is powered by your home\'s power supply.
There is a shock risk of potential death or serious injury.
Know what you are doing and how to use the appliance safely.
Recently, my 3-year-old 40 \"Samsung LCD TV started and took a long time to click on a few relay cycles.
When searching online, I found that other people had similar problems.
Obviously, Samsung\'s power supply on several LCD monitors is a bit insufficient.
The design has four capacitors that fail slowly over time and cause symptoms in the title.
There are several options for maintenance: 1)
Bring a suit to a qualified repair shop (est $300 -$500). 2)
Buy new, replaced, power ($100 -$175). 3)
Replace the capacitor ($4. 00 -$15. 00)
I chose Option 3 for $15.
00 change Samsung repair kit (contains 4-
1000 uF, 25 V, 105 ° c capacitors and \"instructions \").
If you want to keep the cost to a minimum, you can get from Digi-
About $0 Key or trade. 65 each + s/h.
Tools you need: Phillips screwdriver capable of contacting recessed screws (about 1\" deep)
Soldering iron for general electronic components.
Note: According to the Samsung repair kit instructions, this repair is available for the following models: xa/xalnt4061fx/xaclnt4061 FX/xplnt4065hx/xaaprint display is placed face-down on the buffer table.
Remove the screws from the lid and remove the screws from the bracket. (
If bracket is attached)
I have an optional wall mount installer that needs to remove the wall mount hardware from the back cover
4 screws in total.
There are seven screws to fix the power supply as well as various cables connected to other components.
Remove the cable, remove the screws and lift the power supply. Important Tips-
Although the capacitor is not particularly sensitive to electrostatic discharge (ESD)
, Most of the components on the power supply and other boards are!
Take appropriate measures to avoid electrostatic discharge (
Pick up areas, etc. )
Or risk completely firing your electronics.
If this happens, you will no longer face cheap repairs.
There are four kinds of electrolytic capacitors to be removed: CM812, CM811, CM817, cs806.
These are clearly recorded on the front and back surfaces of the Power board. (
If you need a tutorial on how to gosolder \"thru-
The \"hole\" component, which has both text and video on the network. )
You may see four capacitors of interest showing the lid of the drum kit, and may even leak the material.
On my TV there is only one that shows a leak, but all four are bulging.
The circuit they use is marked at 5 points. 4V.
According to my reading in the electronics field, in general, the rated voltage of the capacitor is at least twice that of the planned circuit.
Given that the original capacitor has a rated voltage of 10 v, it seems to indicate that a slight fabrication here may result in premature failure.
Capacitor polarization.
This means that you have to pay attention to the positive and negative leads on the capacitor.
The polarity on both capacitors is clearly identified, with a stripe on the side of the polarized capacitor with a negative sign, the circuit board (
Both front and back indicate polarity).
It is not good that the polarity does not match.
In the best case, the capacitors will fail, and in the worst case they will explode, and I don\'t think, any good for the board.
Replace the newly repaired power supply and connect the internal cable to other components. Re-
Connecting the back cover and bracket (if used)
, Or wall mount bracket.
Connecting external cables (
Video, antenna, etc. ).
Finally, plug in the power cord.
If everything goes well, press the power button and you will see that your set up power is up as if it were new.
Note: Photos of my work TV do not represent images!
Horizontal stripe is an artifact.
You may find the following useful information: Samsung LCD power supply repair kit-BN44-
00167 asamaster power replacement-BN44-00167FDigi-Key -www. digikey.
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