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Back side of a motherboard

post #1 of 6
Thread Starter 
I have a little question...what are these four?

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post #2 of 6
http://en.wikibooks.org/wiki/Electro...FSMT_resistors

SMD (surface mounted device) or SMT (surface mount technology; same thing) resistors are found mostly on devices where large scale integration is present. They generally use an alphanumeric numbering system.

For surface mount resistors, a numerical code is used. For 10% tolerance resistors, 3 numbers are used, for 1% resistors, 4 digits are used. The scheme is similar to color codes, in that the first two or three digits are the significant digits, and the last digit is the multiplier (expressed as an exponent of 10). This is easy to remember as "the first digits then as many zeros as the last digit after it" ohms. "683" for instance, represents 68 with three zeros after it: 68 000 = 68 kΩ. Likewise, "4991" represents 499 with 1 zero after it: 499 0 = 4.99 kΩ.
For small resistance values, an alternate notation is often used. For these, an R is used in place of the decimal. For example, 5R6 = 5.6 Ω.

When it comes to SMD/SMT capacitors... these are often not even labeled. If they are labeled, it is the same system as SMT resistors, but representing pF. Polarized capacitors are marked with a stripe on the positive end of the package, though some electrolytic SMT capacitors are marked on the negative end of the package. They are rectangular, and often black or tan colored. The black capacitors are easily mistaken for diodes due to the white stripe on one end...
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post #3 of 6
^ Basically, they are important, and shouldn't be messed with
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post #4 of 6
Don't mess with those. Theres a reason why backplates have a hole so those don't get rubbed against.
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F-U-B-A-R
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Corsair Vengeance 8GB 1600mhz (9-9-9-24) 1.4v Samsung 830 128gb Samsung 850 EVO 500gb WD Green 2TB 
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Koolance CPU-380I BitsPower Fittings PrimoChill Advanced LRT Koolance R9 290 Waterblock 
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Koolance R9 290 Waterblock XSPC Dual 5.25'' Bay Laing D5 Lamptron FC5-V2 AlphaCool NexXxos ST30 240mm 
CoolingCoolingCoolingCooling
AlphaCool NexXxos ST30 120mm AlphaCool NexXxos XT45 180mm x3 NoiseBlocker E-Loop B12-3 Silverstone Air Penetrator AP181 
CoolingOSMonitorKeyboard
Alphacool VPP655 Windows 7 Pro 64bit Dell Ultrasharp U2711 Ducky Shine 2 Red Cherry MX 
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post #5 of 6
Thread Starter 
Assuming they were missing, they can be replaced, correct?
System #1
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i5 3570k P8Z77-V MSI 670GTX Hynix Ram 
Hard DriveOptical DriveCoolingOS
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MonitorKeyboardPowerCase
Samsung P2370 Generic keyboard Corsair 850-TX CoolerMaster 690 
MouseMouse PadAudio
Razer Deathadder Razer Goliathus Alpha Asus Xonar DX 
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System #1
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CPUMotherboardGraphicsRAM
i5 3570k P8Z77-V MSI 670GTX Hynix Ram 
Hard DriveOptical DriveCoolingOS
2x 500GB, 1x1TB, 1x128GB SSD Sony DVD-RW Coolermaster Hyper 212+ Windows 7 Professional SP1 
MonitorKeyboardPowerCase
Samsung P2370 Generic keyboard Corsair 850-TX CoolerMaster 690 
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Razer Deathadder Razer Goliathus Alpha Asus Xonar DX 
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post #6 of 6
Quote:
Originally Posted by Gattsu View Post
Assuming they were missing, they can be replaced, correct?
o.O

Assuming you knew the values and had a decent soldering iron, yes.
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Reborn Legacy
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