Edit By Gemi 2004.7

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Mother Board Advanced Maintenance
Methods Tài li?u s?a ch?a nâng cao

• Edit By Gemi 2004.7
• Translate by lqv77.com

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No Power improper maintenance methods
Power ON Flow Of P4SQ
Figure (A)
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No Power improper maintenance methods
Power ON Flow Of P4PE
Figure (B)
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No Power improper maintenance methods
Power ON Flow Of A7V600-F
Figure (C)
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No Power improper maintenance methods
Power ON Flow Of P4V800-X
Figure (D)
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No Power improper maintenance methods
Schematic display card protection
Principle In normal operation, the red light
does not shine, AGP_VOLT3V as HIGH,Q14
Open PSON and PWR_PSON Conduction. When the
Card inserted or not inserted the wrong time,
TYPEDEF Will become HIGH,this Q15
open,AGP_VOLT3V Will be pulled to ground into a
LOW, the red light off Q14Closed, PSON and
PWR_PSON disconnected, whichNot the kind of
electricity.
Figure (e)
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No Power improper maintenance methods
CPU over-temperature protection schematic diagram
PrincipleIn this figure, DXP ??detection of
this signal is temperature PIN, it is connected
to a thermistor. normal working hours, PWR_PSON
and the PSON is conduction, DXP ??detect the
CPU temperature exceeds its limit, Fengyun IC to
Will PWR_PSON and PSON to turn off the system
power off, so to protect the CPU overheat and
burn Buzhi Yu.
Figure (f)
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No Power improper maintenance methods
Specific maintenance steps

1. Check 5VSB, 3VSB and PWRBTN (3v or 5v) is
   OK.Plug in the power, press PWRBTN PSON
   signal with the oscilloscope to see if it is
   pulled Low. If the PSON is pulled Low, but
   still can not give out ATXPOWER power, this
   situation is due to the internal power supply
   protection circuit operation, the main reason for
   this situation is a part of the motherboard or
   the power to ground short circuit between the
   short circuit. Check the motherboard for this is
   mainly on the 12 V, 5 V, 3 V and Vcore are not
   short-circuit to ground or each other. If the
   PSON or for the High, then Next.For the next
   analysis is used depends on the specific
   motherboard Chipset. Models below are examples to
   illustrateP4PE (Figure II)1. Check PWR_PSON
   This line is OK. (the amount of PWR_PSON
   multimeter to the graphics card protection
   circuit from ATX)2. Check PSON whether there
   is action, if the action properly, check the
   graphics card protection circuit is working
   properly.3. PSON if no action is issued by the
   South Bridge SLP_S3 Check whether there is
   normally issued, if OK, replace the ASUS chip.4.
   If SLP_S3 not properly issued, the first check
   whether the start-32KHZ oscillator, oscillator
   with voltage, but if can not afford to vibration,
   replace the oscillator. For non-voltage, the
   first two legs Check diode oscillator value is
   normal, and then to the South Bridge 3VSB Check
   whether it is normal, if all OK, replace the
   South Bridge.5. If 32KHZ oscillator is normal,
   then re-check the ASUS chips issued RSMRST This
   signal is normal. If RSMRST is OK, then you can
   try to replace the South Bridge. If RSMRST is
   not normal, then check the supply ASUS chip 3VSB,
   5VSB, and BAT is OK, if all OK, then replace the
   ASUS chip.

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No Power improper maintenance methods
Specific maintenance steps

• A7V600-F (Figure III)Check PSON This line is
  OK. (Table amount of electricity from PSON to
  the graphics card protection circuit ATX)Check
  protection circuit card issued PWR_PSON whether
  action, if the action properly, check the CPU
  over-temperature protection circuit is working
  properly.Check AS-016 chips sent SUSB is normal,
  if OK, then check the graphics card protection
  circuit is working correctly.Southbridge issued
  SUSB Check whether it is normal, and if OK,
  replace the AS-016 chip.If SUSB issued without
  the normal, check the supply Southbridge 32KHZ
  frequency, PWRBTN and RSMRST these signals
  are normal. If you are OK, you can try to replace
  the South Bridge.If 32KHZ oscillator sluggish,
  you can replace the oscillator. If no normal
  distribution PWRBTN South Bridge, you can check
  the relevant circuit.If the AS-016 does not
  normally issue RSMRST , you can check the BATT
  supply AS-016 and the 5VSB is OK, if correctly,
  you can replace the AS-016, or check the relevant
  line.

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No Power improper maintenance methods
Specific maintenance steps

• P4V800-X (shown below)1. Check PWR_PSON This
  line is OK. (the amount of PWR_PSON multimeter
  to the graphics card protection circuit from
  ATX)2. Check Southbridge issued SUSB signal is
  normal, if the signal is normal, you can replace
  the Super I / O.3. If the southbridge is not
  issued SUSB , then check the supply of South
  Bridge, 23KHZ, RSMRST and IO_PME is normal,
  three signals are OK if you can replace the South
  Bridge.4. 32.768KHZ pulse, if not, then check
  the relevant line.5. RSMRST signal if not,
  then check the supply of Super I / O's 5VSB and
  BATT is normal, are OK if you can replace the
  Super I / O.6. If IO_PME not working properly,
  then look in the press PWRBTN button, PWRBTN
  pull and pull-down signal if the action, if you
  can replace the Super I / O.

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00 OR FF improper maintenance methods
For FF, 00 can not boot there are several
different classification of the phenomenon will
be described below (the PC-DL models as an
example)

1. Shown on all points DEBUG

The main reason for this phenomenon is not PCIRST
signal, to quickly repair this phenomenon we
must first understand the principles of the
motherboard RESET signal is generated.Below
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00 OR FF improper maintenance methods
Specific maintenance steps are as follows
1. to get this board first Check the
motherboard's basic operating voltage, Vcore,
1.5V, 2.5V and 1.8V. If one does not check the
voltage of power supply output is related to the
circuit.2. Check RSTCON whether 3V, if not
then check 3 VSB and RSTCON diode value is
normal.    3. Check the motherboard of the
fundamental frequency, supply Southbridge 14Mhz
and 33Mhz.     4. Check southbridge supply the
ICHPCIRST AS-016 is normal, if normal to
consider replacing the AS-016.     5. If the
southbridge is not output ICHPCIRST , the South
Bridge ICH_PWROK Check the supply is correct, if
OK, you can consider replacing the
southbridge.     6. If ICH_PWROK problems, the
supply of AS-016 Check the 5 V and the BATT
voltage is normal, if it is normal, replace the
AS-016.
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00 OR FF improper maintenance methods
2. DEBUG card lock data are all OK after the
address FF
This phenomenon is mainly for the CPU does not
read the BIOS information. BIOS, there are two
connections, one to go ISA bus, LPC bus, another
walk. For the PC-DL this aircraft, it is
connected to LPC.
Specific maintenance steps are as follows

1. Check BIOS on ICHPCIRST is OK, normal, then a
   3 V voltage, the signal after pressing the
   RSTCON high to low by the sub-high.2. Check
   BIOS on PCICLK_FWH is OK, normal, then you can
   measure with an oscilloscope to the 33Mhz
   frequency.3. Check BIOS on FWH_IC is OK, this
   signal is used to set the BIOS is a model which,
   when high that the choice of the A / A MUX Mode
   (ISA architecture), is low that the FWH mode is
   selected (LPC Architecture), the board in this
   machine through a resistor in this signals Pull
   Low.4. Check BIOS is on the FWHHINIT OK, this
   is a BIOS initialization signal, normal, then you
   can measure with an oscilloscope to the 3 V
   voltage.5. Check BIOS on LAD0 LAD3 four
   signals are normal, with three tables and the
   oscilloscope with its two extremes and the
   voltage is normal.6. If these signals are OK, as
   the BIOS information on the general air burning,
   can replace the BIOS.

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00 OR FF improper maintenance methods

1. CPU does not work

This phenomenon is not inserted plug CPU CPU
DEBUG and run on the data card is the same.
Specific maintenance steps are as follows

1. First Check Vcore voltage is normal, if not OK,
   then check the Vcore related lines.2. Check
   CPU's CPUPWROK and CPU_RST is normal, if
   CPUPWROK not, then check whether the working
   conditions of South Bridge OK, if all OK, you can
   replace the South Bridge. If not CPU_RST , first
   check the supply voltage and frequency
   northbridge is normal, then check the HUB-LINK
   between north and south bridge line is normal, if
   the signal is OK, you can replace the North
   Bridge.3. Check Host Bus frequency and CPU
   frequency is OK.4. Check Host Bus's GTLREF is
   normal, the normal voltage of Vcore voltage
   two-thirds.5. Check CPU's TESTHI signal is
   normal, if not correct for the CPU to the CPU
   will not work there.

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00 OR FF improper maintenance methods

1. DEBUG live data files on the card

This is like the CPU has to move now, but in
reading the address data file or data errors lead
to the machine.
Specific maintenance steps are as follows

1. Check CPU of the HA 331 , HD 063 , HDSTBN
   03 , HDSTBP 03 and HDBI 03 signals
   are those OK, mainly through the amount of
   Measured to determine the value of two-body
   protection, for if there are Open or Short amount
   to the need to take the line to determine Socket
   or North Bridge.2. Check HUB_LINK between north
   and south bridge signal is normal. DEBUG lock
   step when running, in the first time, DEBUG DATA
   and ADDRESS on the display is not correct, such
   as DATA FFFFFFFF ADD 00BFBFD0, then check
   these signals.3. Check PCI interface signals AD
   031 , C / BE 03 , FRAME , DEVSEL , IRDY
   , TRDY and STOP is OK.4. If these signals
   are OK, it may be caused by bad bridge, south
   bridge replacement be replaced, to replace the
   North Bridge.

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