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Old 05-16-2019, 10:35 AM   #1
jstraksis
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Default can anyone help me identify this cap

https://photos.app.goo.gl/mHsjtJc4Q8ynUvqWA

was testing caps on this board and this one is giving me an intermittent short then a reading of 70microF
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Old 05-16-2019, 11:16 AM   #2
mariushm
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Default Re: can anyone help me identify this cap

Read the text on the capacitor, type what's written on it here...
or take a clear picture (use macro mode if needed) and upload it here

based on all the other capacitors on the board, it's most likely a samwha or samyoung capacitor, series and specs I have no idea... that's why you're supposed to read what's on it.
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Old 05-16-2019, 11:32 AM   #3
jstraksis
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Default Re: can anyone help me identify this cap

https://photos.app.goo.gl/V912a8vU2qEN44dt9

I read whats on the cap but it doesn't list any capacitance but it acts like it wants to keep discharging repeatedly unlike the other capacitors

Last edited by jstraksis; 05-16-2019 at 11:34 AM..
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Old 05-16-2019, 11:48 AM   #4
R_J
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Default Re: can anyone help me identify this cap

The markings are likely on the other side, what is the problem with the tv? The cap is for the B5v supply It might be a 390f/25v
There are two 390Ω resistors in parallel with the cap.
Check if QS851 is shorted
Then check all the solder connections on the transformer pins and fets etc. that are mounted to the heatsinks

Last edited by R_J; 05-16-2019 at 12:31 PM..
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Old 05-16-2019, 01:16 PM   #5
jstraksis
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Default Re: can anyone help me identify this cap

its from samsung tv, the power relay keeps clicking on wait 5-10 secs but it never powers up the tv. this cap will carry 5V then discharge with the relay. but the tv never turns on it just keeps power cycling. the caps all appear in good working order show readings of or above their rating.
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Old 05-16-2019, 02:02 PM   #6
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Default Re: can anyone help me identify this cap

Quote:
Originally Posted by jstraksis View Post
its from samsung tv, the power relay keeps clicking on wait 5-10 secs but it never powers up the tv. this cap will carry 5V then discharge with the relay. but the tv never turns on it just keeps power cycling. the caps all appear in good working order show readings of or above their rating.
Did you verify that the PS-ON stay at >2V when the relay drops out? Relay is turned on by the PS-ON signal.
Is the standby power supply Voltage steady?
You should report the Voltage reading of the power supply connector that goes to the main board is in standby and when power switch is activated, make sure to put down the pin name and follow by the reading for each pin so we can easily see what is going on.
What is the Model of the TV?
Power supply board BN44-??????
I see you double post: https://www.badcaps.net/forum/showthread.php?t=76638
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Basic LCD TV and Monitor troubleshooting guides.
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Voltage Regulator (LDO) testing:
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TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809

Last edited by budm; 05-16-2019 at 02:08 PM..
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Old 05-16-2019, 02:54 PM   #7
jstraksis
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Default Re: can anyone help me identify this cap

ill test that item in a few im trying to locate it currently


TV model : UN60F7100AFXZA

POWER Supply Board: BNN-00630A

from what I can see pin 22 A5V it is the only pin that is carrying voltage before I try and turn the TV on
https://photos.app.goo.gl/YGGSigaaSP3aKiJr8

Standby pin 22 holds 5.34 V steady throughout

PS-ON PIN 24 is 0.26V in standby mode
PS-ON PIN 24 3.3V when relay closes,
PS-ON PIN 24 0.26V when relay clicks back out

Last edited by jstraksis; 05-16-2019 at 03:11 PM..
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Old 05-16-2019, 06:58 PM   #8
jstraksis
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Default Re: can anyone help me identify this cap

QS851 does not appear to be shorted out
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Old 05-16-2019, 09:05 PM   #9
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Default Re: can anyone help me identify this cap

Well, you need to find out why the main board stops sending the PS-ON signal.
Since we are trying to fix TV you should stick to this TV thread instead:
https://www.badcaps.net/forum/showthread.php?t=76638

Last edited by budm; 05-16-2019 at 09:07 PM..
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Old 05-16-2019, 09:48 PM   #10
jstraksis
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Default Re: can anyone help me identify this cap

ok
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Old 05-25-2019, 09:06 PM   #11
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Default Re: can anyone help me identify this cap

lmao Sam Young. more chinese junk like the rest of the capaciotrs
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