I desoldered samwha NF capacitor(50v 5.6uf) from PCB circuit of 29inch CRT TV which have symptoms of no display after I heard sound of inrush of current to TV whenever I switch on this television.
I measured ESR value of this non-polarized capacitor(samwha NF capacitor 50v 5.6uf) by means of MESR-100 ESR meter and It displayed 0.3 ohm
And When I measured its capacitance with digital multimeter and LCR-T4 Mega328 meter, It displayed 10uf from DMM and 8uf from LCR-T4 meter.
I found catalogue of samwha capacitor(samwha-catalogue_3.pdf file), which is attached to this thread,...
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Hello, good morning, I am trying to find a diagram and schematic of my son's graph but I can't find it anywhere. If there is a possibility to find it here, boardview or whatever to know what is happening to him, I would appreciate the help.
(the graphic of your problem does not give video and when I connect it to the board the fans speed up and they do not turn off or give video)
Thanks in advance2 Photos-
Channel: Common Parts Library - Datasheets
Today, 07:07 PM -
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by 247Hello everyone,
I have a:
Laptop (Acer Swift Go 16)
MODEL: N23C7
SFG16-71-771P
I need to replace the USB/audio board but can't find it anywhere. I googled, used Goolge image search, nothing, not even on aliexpress.
Do you know where else I can look for the part?
[ATTACH=JSON]{"alt":"Click image for larger version Name:\t428497953_1166922261286974_6954806548247543682_n.jpg Views:\t0 Size:\t150.2 KB ID:\t3281429","data-align":"none","data-attachmentid":"3281429","data-size":"custom","height":"309","width":"689"}[/ATTACH]...05-31-2024, 03:53 AM -
by OmronGuys I have set top box which has no power on in specific case. When I insert antenna plug which has 12V on it because of dB gain device on top of antenna, device if its turned off, it will not turn on.
After I need to open the case and short + and - on ABS10 chip and after that device will turn on, without antenna plugged in, after its turned on I can plug in antenna and it will work fine, but I notice there is some extra heat inside the unit.
Is this chip okay? Rectifier bridge ABS10 JQC I don't think there should be connection like additional diode between plus and minus...Today, 03:09 AM -
by x_orange90_xI get backlights that stay on not there is no image. The tv does not automatically power on when plugged in either which I generally see happen when there is a fault. It responds as it should to the power button.
I checked the test points on the TCON and I have proper voltages except for at 1P15V. I don't know if that is supposed to be 15V or 5V, but either way I only get 1.134V on that point. I have 12V, 8V, VCC, and a small amount on the CKV point.
I tried heating up the SoC on the main board but that made no difference. Disconnecting either ribbon from the TCON also...Yesterday, 08:55 PM -
by ChattFixI have a Samsung UN55TU700DFXZA with a distorted picture and I thought it was a bad panel. I had a similar board with one number off and still tried it to see what the issue could be. The picture came out clear with only missing blue hue I think. I found a replacement board for $30 but wanted to learn if this would be the main IC or possibly something else. I don't have service manual so looking to learn about these cheap sets....Today, 03:50 PM
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by Perry BabinI think this has been answered but I couldn't find the thread.
Someone asked me if it would harm a capacitor (10F [not a typo], 24v) if it was operated on nothing more than 12v.
So, I ask... Does it change any of the capacitor's characteristics/parameters/? in any way if it is never operated near rated voltage?
If operated for years at 1/2 rated voltage, does it accept full rated voltage like it would if it had always been operated at the higher voltage?
Or would it require reforming?-
Channel: General Capacitor Questions & Issues
05-23-2024, 05:43 PM -
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by ChattFixHey everyone, I have an LG 65uq7050zud with a black picture but backlight is on. I tested the measurements from the PSU and they check out. I can’t find any service manual so I’m suspecting the main board. Any advice before I replace the board? Found them for around $60...Today, 12:10 PM
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by piernovHi,
Got a Finlux 65-FUC-8060 TV that doesn't turn on, 5V standby present from PSU, 3.3V on mainboard present, button signal gets pulled low when pressed, but mainboard never sends signal to PSU to turn main rails on.
I suspect corrupt firmware but I haven't been able to find anything for this TV.
TV model: Finlux 65-FUC-8060
Mainboard: Vestel 17MB130S 23473048
Panel: VES650QNTS-2D-U11
At the very least looking for a firmware that can make it turn on to confirm the problem, and hopefully a firmware that's compatible with the panel.Yesterday, 12:57 PM -
by paulyboyMy microscope is not getting power and upon opening I have found an Ic that's burnt it's lettering is CW0Q and it has 6 pins looks to be sot23-6 package.
Thanks
Ps will upload Pic shortlyToday, 02:54 AM
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by x_orange90_xI get backlights that stay on not there is no image. The tv does not automatically power on when plugged in either which I generally see happen when there is a fault. It responds as it should to the power button.
I checked the test points on the TCON and I have proper voltages except for at 1P15V. I don't know if that is supposed to be 15V or 5V, but either way I only get 1.134V on that point. I have 12V, 8V, VCC, and a small amount on the CKV point.
I tried heating up the SoC on the main board but that made no difference. Disconnecting either ribbon from the TCON also...Yesterday, 08:55 PM -
by ChattFixHey everyone, I have an LG 65uq7050zud with a black picture but backlight is on. I tested the measurements from the PSU and they check out. I can’t find any service manual so I’m suspecting the main board. Any advice before I replace the board? Found them for around $60...Today, 12:10 PM
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by ChattFixI have a Samsung UN55TU700DFXZA with a distorted picture and I thought it was a bad panel. I had a similar board with one number off and still tried it to see what the issue could be. The picture came out clear with only missing blue hue I think. I found a replacement board for $30 but wanted to learn if this would be the main IC or possibly something else. I don't have service manual so looking to learn about these cheap sets....Today, 03:50 PM
-
Hello, good morning, I am trying to find a diagram and schematic of my son's graph but I can't find it anywhere. If there is a possibility to find it here, boardview or whatever to know what is happening to him, I would appreciate the help.
(the graphic of your problem does not give video and when I connect it to the board the fans speed up and they do not turn off or give video)
Thanks in advance2 Photos-
Channel: Common Parts Library - Datasheets
Today, 07:07 PM -
-
by OmronGuys I have set top box which has no power on in specific case. When I insert antenna plug which has 12V on it because of dB gain device on top of antenna, device if its turned off, it will not turn on.
After I need to open the case and short + and - on ABS10 chip and after that device will turn on, without antenna plugged in, after its turned on I can plug in antenna and it will work fine, but I notice there is some extra heat inside the unit.
Is this chip okay? Rectifier bridge ABS10 JQC I don't think there should be connection like additional diode between plus and minus...Today, 03:09 AM -
by mrsdsdsdsdhi everyone i hope you all doing well.
i'm trying to replace a sim socket in my 4g router, i found similar parts on aliexpress and i'm not sure if it will work on my device (Huawei b593s-22)
here's the original one:
[URL=filedata/fetch?id=3282749&d=1717353741][ATTACH=JSON]{"alt":"Click image for larger version Name:\thuawei_b593s-22_back_inside.jpg Views:\t0 Size:\t233.6 KB ID:\t3282749","data-align":"none","data-attachmentid":"3282749","data-size":"medium"}[/ATTACH][/URL]
and here's...-
Channel: Troubleshooting & Designing Networks
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by harpTrying to understand which properties of circuit affect triac phase range, is it possible to control near whole period, or it have some limitations - on net found a couple circuit, that claims almost full control, but in the past I build some simple circuit and remember that it do only half of control over triac?...Today, 09:00 AM
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by stjMetrix OX-8627
100Mhz dual-trace digital storage CRT scope.
all controls are digital and it has full remote via IEE488 bus
very fucking rare and hard to find any info on
some pics after a recap using about 90 new caps!!
[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3282614}[/ATTACH] [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3282618}[/ATTACH] [ATTACH=JSON]{"data-align":"...-
Channel: General Computer & Tech Discussion
Today, 08:47 AM -
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by totofHi i have Samsung UE55MU6405
The tv will not turn on, there is no standby light.
Main board BN41-02568B (BN94-11958Q)
Screen CY-KM055HGAV3H
When i remove the psu cable to main board i get backlight
1,8V and 3,3V on main board
Attached my dump file from 25Q40
Can someone send me the right file please?...12-23-2022, 10:46 AM -
by pavskiTrying to troubleshoot MSI z490 tomahawk board and would appreciate your help. The board is completely dead and shows no activity when the power button is pressed.
I have tried to look at the Superio, the PSIN signal seems to be correct (goes from 3.3V to 0 on button press) but the voltage on PSOUT pin is quite low. I
t is only 0.8V which seems to be incorrect but goes to 0 when the button is pressed.
Can you please let me know if this is indeed incorrect and what else should I look at next?
Thanks!Today, 02:42 PM