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#1
18-05-09, 09:49 PM
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South Bridge South Bridge hot maintenance + method to determine the breakdown
South Bridge maintenance should be a distinction between hot issue is the circumstances under which the South hot! , 1) connected to ATX power supply, the case does not trigger on the hot South, 95% of the general can determine the breakdown for the South! SB5V/3.3V At the same time, accompanied by the existence of short-circuit conditions Removed LAN, 1394, such as taking the original PCI bus, SB3.3V-to-ground resistance measurement, which is lower than 80 ohms can determine the general breakdown for the South! 2) connected to ATX power supply, do not trigger when there is no South Bridge temperature, triggered after the South hot! (Generally associated with the diagnosis card will show no reduction) Common in South INTEL large, 82801eb/db ........ and so on ~ AGP fault is willing to inadequate power supply, repair, after the general South Vagp normal temperature! 80% of the AGP power MOS tube breakdown, or MOS control the IC very bad! Generally the LM324 op amp ~ Silver Fox and other non-brand-name products will have a bad ~ WB1601A often caused by non-AGP power! WB1601A only non-brand motherboards in seen ~ Online information ~ Who can not find PDF, then PM me ~ Normal supply of electricity if the AGP is still hot after the South in general can be played to determine whether the AD Line for the South Bridge bad! The following conditions can determine the general breakdown for the South Bridge: 1) SB3.3V-to-ground short-circuit or the resistance is less than 80 ohms 2) CMOS jumper on the middle of the foot to short-circuit 3) then do not trigger Nanqiao ATX hot 4) for ICH4 and ICH5, the play USB interface diode-to-ground value is also very important based on the measurement! Especially since the USB plug can not be triggered by equipment! Usb to pay particular attention to two lines of resistance! Of course, to exclude short-circuit their own USB port! USB line of exclusion scheduling will also affect the capacity! (This trick used in notebook repair a wide range! I am also a notebook with the maintenance of the Institute of buddies! But forget to add here! Thank remind fly!) Would like to determine a more accurate breakdown Nanqiao line can be played to determine the AD! Transferred to other forum I posted the whole family to die ~ Summary: ATX plug does not trigger, SB exclude hot LAN, 1394, compared with SB breakdown triggered by a short circuit after the hot, more power for less than AGP, and VIA, SIS encountered SB insufficient Vcore hot! Generally measured around the core of the whole power supply board whether or not normal, normal play of the AD line SB for SB determine whether bad ~
التعديل الأخير تم بواسطة NOOOOR ; 26-05-11 الساعة 09:59 PM.
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رد: South Bridge South Bridge hot maintenance + method to determine the breakdown
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| south bridge south bridge hot maintenance + method to determine the breakdown |
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