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04-04-2012, 03:13 PM
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#1 |
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Badcaps Veteran
Join Date: Dec 2009
City & State: Prague, 50°4'52.22"N, 14°23'30.45"E
My Country: CZ
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Burned SMD component on input
Hi,
I got laptop for repair where his owner tried to fix broken cable on the output of PSU. He connected the PSU to laptop, after flash computer did no longer work. Anyway, I got the laptop with some burned component on input, right on voltage/ground after the connector. From its size I would say inductor, but it is totaly burned, no mark there. IMHO it is too small to be a fuse or diode. What do you think it may be and what should I replace it with? ADD// seems to be a capacitor, will change it for some. Is there some way how to find maximum voltage of a ceramic SMD cap? I have some unsoldered, but…do not wish to have it burned due to overvoltage again.
__________________
Less jewellery, more gold into electrotech industry!  Half of the computer problems is caused by bad contacts 
Last edited by Behemot; 04-04-2012 at 03:24 PM.. |
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04-04-2012, 03:37 PM
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#2 |
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Slow Learner
Join Date: Dec 2010
City & State: Lancashire UK
Posts: 4,657
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Re: Burned SMD component on input
Make -model of the laptop? - picture of the area?
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04-04-2012, 03:51 PM
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#3 |
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Badcaps Veteran
Join Date: Dec 2009
City & State: Prague, 50°4'52.22"N, 14°23'30.45"E
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Re: Burned SMD component on input
It is Asus F5R-AP002. I have already identified it as a capacitor (traced again and this time found it is between voltage and ground). Totally burned, shorted.
But I have to buy new one, I am afraid the unknown I have will burn again since there is as high as over 19 V there. I only hope they will have X5R or X7R in 25 V and some usabel capacity. Do not want Y5V it is piece of crap with +22/-86 % tolerance  Last edited by Behemot; 04-04-2012 at 04:34 PM.. |
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04-04-2012, 04:27 PM
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#4 |
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Slow Learner
Join Date: Dec 2010
City & State: Lancashire UK
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Re: Burned SMD component on input
Cant find any info on that model number
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04-04-2012, 04:34 PM
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#5 |
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Badcaps Veteran
Join Date: Dec 2009
City & State: Prague, 50°4'52.22"N, 14°23'30.45"E
My Country: CZ
Line Voltage: 230 V/50 Hz
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Re: Burned SMD component on input
"5" slipped out. Anyway, whaddaya think you will find?
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04-04-2012, 06:56 PM
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#6 |
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Banned
Join Date: Sep 2010
Posts: 641
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Re: Burned SMD component on input
I can't find schematic of that model so post clear pictures of the area and we might be able to find similar circuits in other models for replacement consultation.
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04-04-2012, 06:56 PM
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#7 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
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Re: Burned SMD component on input
You can measure the size, more likely to be 10~22uF 25V MLCC.
I.E. http://www.mouser.com/Passive-Compon...d=mlcc&FS=True |
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04-05-2012, 04:32 AM
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#8 | |
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Slow Learner
Join Date: Dec 2010
City & State: Lancashire UK
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Re: Burned SMD component on input
Quote:
This ? http://notebookreparos.com.br/notebo...s/ASUS/F5R.zip |
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04-06-2012, 01:56 PM
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#9 |
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Badcaps Veteran
Join Date: Dec 2009
City & State: Prague, 50°4'52.22"N, 14°23'30.45"E
My Country: CZ
Line Voltage: 230 V/50 Hz
I'm a: Knowledge Seeker
Posts: 1,366
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Re: Burned SMD component on input
Nice stuff, but still haven't realyl found the very input in there:-D
Anyway, laptop works liek charm…eh, at least HW. Updatign the OS, mainly the .NET, is totally different story… |
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