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#1 |
Senior Member
Join Date: May 2015
City & State: depok
My Country: indonesia
I'm a: Knowledge Seeker
Posts: 135
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![]() I cant determine what type of this IC, MU4LA
any one know? and what substitution for this ic? |
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#2 |
Banned
Join Date: Apr 2014
City & State: Zhitomir
My Country: Ukraine
I'm a: Professional Tech
Posts: 181
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![]() which platform (marking) motherboard?
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#3 |
Senior Member
Join Date: May 2015
City & State: depok
My Country: indonesia
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![]() it's asus x450j. SV41 JN MB 13320-1 448.01P03.11 only that printed on the board, and only one ic is bad the other one is work, I have switch that two ic's. that ic's is look like sy8208dqnc which code MU3XX, try it and not work. http://www.*******************/detail/...dqnc-1132.html |
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#4 |
Banned
Join Date: Apr 2014
City & State: Zhitomir
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![]() Pu4801 - sy8208bqnc
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#5 |
Senior Member
Join Date: May 2015
City & State: depok
My Country: indonesia
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#6 |
Senior Member
Join Date: May 2015
City & State: depok
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![]() Hi... already try sy8208bqnc from here :
http://www.*******************/detail/...bqnc-1134.html but still not work, any suggestion... |
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#7 |
Senior Member
Join Date: Oct 2010
City & State: Palangkaraya, Central Kalimantan
My Country: Indonesia
Line Voltage: 220VAC 50Hz
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Posts: 769
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![]() what exactly your problem?
-Doesn't react to power button and doen't charge the battery + led the adapter off immediately -Doesn't react to power button and doesn't charge battery -Doesn't react power button but the battery charging is working -Power up but the battery charging doesn't work -Power up but then shutdown immediately -Power up but doesn't display anything on the screen |
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#8 | |
Senior Member
Join Date: May 2015
City & State: depok
My Country: indonesia
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![]() Quote:
only on that output ic's volt missing, one ic work and the other not. compare that two ic identically. |
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#9 |
Senior Member
Join Date: May 2015
City & State: depok
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![]() any one can help...
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#10 |
Senior Member
Join Date: Oct 2010
City & State: Palangkaraya, Central Kalimantan
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![]() didn't find schematic and datasheet the IC, if I see from kotnatan's pic the IC for PWR_1D05V rail
Did you get voltage on pin#1 pwr_1d05v_en? try register on http://****************/load/noutbuki/306 you'll find boardview for this model, you should pass the test first. then search asus x450jn Last edited by meritosari; 12-15-2015 at 11:34 PM.. |
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#11 |
Senior Member
Join Date: Oct 2010
City & State: Palangkaraya, Central Kalimantan
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![]() This part of schematic as reference that I hope would help you, taken from compal/lenovo G505s
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#12 |
Badcaps Veteran
Join Date: Mar 2009
My Country: Australia
Line Voltage: 230VAC 50Hz
Posts: 772
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![]() The SY8208 part was manufactured by Silergy (it was also the subject of a patent infringement case). AFAICT it has at least three versions -- adjustable (DQNC), 3V fixed (BQNC), 5V fixed (CQNC).
Note that the suffix is VERY IMPORTANT. Page 38 of the following schematic shows a SY8208DQNC_QFN10_3X3: http://www.datasheetcafe.com/wp-cont...SY8208BQNC.pdf The Compal circuits show a SY8208BQNC_QFN10_3X3 on page 1 (PU401), a SY8208CQNC_QFN10_3X3 on page 1 (PU403), a SY8208DQNC_QFN10_3X3 on page 2 (PU701) & 3 (PU451): http://www.badcaps.net/forum/attachm...4&d=1450291182 More schematics ... http://kythuatphancung.vn/uploads/do..._r1.0_2014.pdf The SY8208DQNC incorporates an adjustable step-down switchmode converter with a feedback reference voltage of 0.6V. The SY8208BQNC appears to be a fixed 3V converter, and the SY8208CQNC appears to be a fixed 5V converter. Last edited by fzabkar; 12-19-2015 at 12:23 AM.. |
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#13 |
Senior Member
Join Date: May 2015
City & State: depok
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![]() Big Thanks to every one, problem solved,
yes the IC is sy8208DQNC adjustable not fixed voltage. unfortunately bios is curupped to, that's why this board still not work. after flash that dump bios, bord working perfectly, |
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#14 |
Boardkiller
Join Date: Feb 2014
City & State: slovakia
My Country: slovakia
Line Voltage: 230VAC 50Hz
I'm a: Hobbyist Tech
Posts: 3,011
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![]() that could be problem on VGA DDR
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