SAE Posted June 25, 2004 Posted June 25, 2004 Hi all. You know the differences between China and TW LP B/Infinities was one of the most discussed topics on DFI (besides warm/cold boot, hehe)... and I remember some electrical engineers saying they could not find differences (hello uwackme ). Hmm. I just examined my China board and then compared it to the dead TW one. 1st pic: PCB The China one looks brownish, TW is black... [bIMG]http://www.xtremesystems.org/forums/attachment.php?s=&postid=478194[/bIMG] The more interesting fact is the FB SMD caps... [bIMG]http://www.xtremesystems.org/forums/attachment.php?s=&postid=478197[/bIMG] [bIMG]http://www.xtremesystems.org/forums/attachment.php?s=&postid=478198[/bIMG] So does anyone know what this means? Different values for them? I did not find any table to determine those... ViperJohn? Anyone else? ADMIN NOTE: PLEASE BE AWARE THERE IS A LIMIT ON POSTING PICTURES...ANYTHING OVER 800x600 IS TO HAVE THE BIMG TAG SO THE PAGES DO NOT SCROLL. THANK YOU Share this post Link to post Share on other sites More sharing options...
Popcicle Posted June 25, 2004 Posted June 25, 2004 Those are surface mount resistors. There will be a number on the resistor iself. That number according to their spec sheets will determine the resistance in OHMS of that resistor. (across that bridge) Share this post Link to post Share on other sites More sharing options...
Oberon Posted June 25, 2004 Posted June 25, 2004 not a number. resistors are normally classified by a series of colored bands. A few for the base resistance, one for eht multiplier, and one for a range above and below the specified resistance (a percentage) Share this post Link to post Share on other sites More sharing options...
SAE Posted June 25, 2004 Posted June 25, 2004 Guys... that's not an ordinary SMD resistor, it's an inductive one, more like a capacity iirc. It's made from ceramic (and I always thought destroying them reveals a tiny tangle of wire) The color code I was referring to has nothing to do with the color rings on normal resistors... no number, no color ring code there... Share this post Link to post Share on other sites More sharing options...
AdvModDev Posted June 25, 2004 Posted June 25, 2004 I always thought the China plant was only responsible for end assembly of DIMM, AGP, and other slots. But the primary reason for China boards at all was cheaper overall production costs. @SAE: maybe the color is irrelevant? Have you meausured them? Share this post Link to post Share on other sites More sharing options...
SAE Posted June 25, 2004 Posted June 25, 2004 Resistance: TW: dark grey caps: 500 mOhm (FB42/3) light grey one: 1.076 kOhm (C9D5) CHINA: white caps: 600 mOhm (FB42/3) rosé one: 1.084 kOhm (C9D5) diode test: TW: dark grey caps: 0.001 kOhm (FB42/3) light grey one: 1.09 kOhm (C9D5) CHINA: white caps: 0.001 kOhm (FB42/3) rosé one: 1.094 kOhm (C9D5) rectangular signal output: TW: dark grey caps: 0.001 kOhm (FB42/3) light grey one: 1.745 kOhm (C9D5) CHINA: white caps: 0.001 kOhm (FB42/3) rosé one: 1.7 kOhm (C9D5) Hmm. Weird Share this post Link to post Share on other sites More sharing options...
Popcicle Posted June 25, 2004 Posted June 25, 2004 They would be allowed a certain % of + or - on thier called for spec. Share this post Link to post Share on other sites More sharing options...
Alexia Posted June 26, 2004 Posted June 26, 2004 Everyone please stop with the thread crapping and get back on subject. This is not appropriate here. Threats WILL NOT BE TOLERATED! PMs have been sent to those involved. Share this post Link to post Share on other sites More sharing options...
ViperJohn Posted June 26, 2004 Posted June 26, 2004 Originally posted by SAE Hi all. You know the differences between China and TW LP B/Infinities was one of the most discussed topics on DFI (besides warm/cold boot, hehe)... and I remember some electrical engineers saying they could not find differences (hello uwackme ). Hmm. I just examined my China board and then compared it to the dead TW one. ViperJohn? Anyone else? The only difference I see in the SMC's in the picture is they are made by different manufacturer. Nothing unusual about that as any sane MB makers will have at least two sources for components like that. With the exception of Electrolytics and Tantalums SMC's of the size are normally never marked. They simply are not big enough. To determine the value they must be desoldered and tested with a capacitance meter. Viper Share this post Link to post Share on other sites More sharing options...
ViperJohn Posted June 26, 2004 Posted June 26, 2004 Originally posted by Popcicle Those are surface mount resistors. There will be a number on the resistor iself. That number according to their spec sheets will determine the resistance in OHMS of that resistor. (across that bridge) Those are surface mounted ceramic capacitors in the pictures. Viper Share this post Link to post Share on other sites More sharing options...
ViperJohn Posted June 26, 2004 Posted June 26, 2004 Originally posted by SAE Resistance: TW: dark grey caps: 500 mOhm (FB42/3) light grey one: 1.076 kOhm (C9D5) CHINA: white caps: 600 mOhm (FB42/3) rosé one: 1.084 kOhm (C9D5) diode test: TW: dark grey caps: 0.001 kOhm (FB42/3) light grey one: 1.09 kOhm (C9D5) CHINA: white caps: 0.001 kOhm (FB42/3) rosé one: 1.094 kOhm (C9D5) rectangular signal output: TW: dark grey caps: 0.001 kOhm (FB42/3) light grey one: 1.745 kOhm (C9D5) CHINA: white caps: 0.001 kOhm (FB42/3) rosé one: 1.7 kOhm (C9D5) Hmm. Weird Capacitor values are not measured in ohms. They are measured in Farads (actually picofarads in this case). A cap will read open unless it is shorted or is a large size then it will read an ohmic value until it is charged by the measuring device. Viper Share this post Link to post Share on other sites More sharing options...
SAE Posted June 26, 2004 Posted June 26, 2004 Originally posted by ViperJohn Capacitor values are not measured in ohms. They are measured in Farads (actually picofarads in this case). A cap will read open unless it is shorted or is a large size then it will read an ohmic value until it is charged by the measuring device. Viper I know... but I don't have this good equipment... C = Q/Uc Share this post Link to post Share on other sites More sharing options...
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