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Voltage

Voltage. S ephiroth Kwon GRMA 20-05-2009. OUTLINE. Advanced Configuration and Power Interface Before Power On Voltage and Signal Power Supply and Stand By Voltage Power button#, RSTCON#, RSMRST# Battery Voltage After Power On Voltage Voltage Distribution P5Q Deluxe P5Q Pro Turbo

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Voltage

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  1. Voltage Sephiroth Kwon GRMA 20-05-2009

  2. OUTLINE • Advanced Configuration and Power Interface • Before Power On Voltage and Signal • Power Supply and Stand By Voltage • Power button#, RSTCON#, RSMRST# • Battery Voltage • After Power On Voltage • Voltage Distribution • P5Q Deluxe • P5Q Pro Turbo • M4A79T Deluxe • Linear & Switch Regulator introduction • Voltage Solution - Linear &Switch Regulator • Typical Linear Regulator • Typical Switch Regulator • VCORE • VCORE architecture & circuit • VCORE Voltage repair Flow

  3. Advanced Configuration andPower Interface

  4. Advanced Configuration and Power Interface S0: All Power S3: Standby and Dual S5: Only Standby

  5. Before Power On Voltage and Signal

  6. Before Power On-Power Supply and Stand By Voltage Unplug ATX Power Supply Plug-in ATX Power Supply

  7. Before Power On-Power Supply and Stand By Voltage 5VSBis a standby voltage that may be used to power circuits that require power input during the powered down state of the power rails. GND GND # GND GND GND PS-ON# is an active low signal that turns on all of the main power rails including 3.3V, 5V, -5V, 12V, and -12V power rails. GND GND

  8. Before Power On-Power Supply and Stand By Voltage South Bridge For LAN Voltage +1.5VSB Linear Regulator +2.5VSB Linear Regulator Linear Regulator +3VSB Super I/O

  9. Before Power On-Power Supply and Stand By Voltage +5VSB PS_ON# +12V,5V,3V • Before you turn on power 5VSB is always high! while you plug in the power supply which offers the standby voltage to some chipsets that can boot MB up! • PS_ON# must be touched off low to turn MB on ! • If PS_ON# were low, every voltages from power supply will operate!

  10. Before Power On-PWRBTN#, RSTCON#, RSMRST#,PS_ON# South Bridge Before you boot up the board, you should measure the Power Button#. #, you must know this signal is acted by low, initially it is high. 1. +5VSB 2. +3VSB Power Button# 3. Super I/O +3VSB GND 3.

  11. Before Power On-PWRBTN#, RSTCON#, RSMRST#,PS_ON# South Bridge RSTCON# is high Initially. While you touch it off, it will reset all of the chipset. 1. +5VSB 2. +3VSB 3. RSTCON# Super I/O GND +3VSB 3.

  12. Before Power On-PWRBTN#, RSTCON#, RSMRST#,PS_ON# South Bridge • When 5VSB and 3VSB send to SIO and SB • SIO will send this signal ‘’RSMRST# ’’ to SB’s boot up circuit to notice the MB is ready to boot up! If this signal is Lo, you can’t boot up MB. • Do you know when RSMRST# is Lo? • The answer is unplug the ATX connector! +5VSB +5VSB RSMRST# = Hi +3VSB

  13. Before Power On-PWRBTN#, RSTCON#, RSMRST#,PS_ON# South Bridge 5V Super IO( IT8282, W83667..) 0V 4. PS_ON# PS_ON Circuit Power Button# # 1. 2. 3. IO_PWRBTN# SLP_S4# SLP_S3#

  14. Before Power On-Battery Voltage • Function of Battery Power are: • CMOS SRAM • Real Time Clock

  15. Before Power On-Battery Voltage First Pin Before boot up the board, please check the jumper in normal status.

  16. Before Power On-Battery Voltage Battery + 32.7 KHz Super I/O South Bridge 3VSB RTCRST# B A RTCRST# CLR CMOS C *Current Leakage measure: Use multi-meter to measure the 1kohm, the voltage value between 1mV~15mV is ok, out of this range is NG. According to Ohm theory: I=U/R, the Current leakage should be 1uA~10uA. 1kohm When you plug in power supply, A=B When you unplug power supply, A=C

  17. Before Power On-Battery Voltage START Use Multi-meter to measure Current Leakage value Change Battery, Measure the C.L. value is OK. The value is out of range Check Battery Power is 3V ok NG NG ok ok Change diode, Measure the C.L. value is OK Check Diode RB715 is OK NG ok ok Change I/O, Measure the C.L. value is OK Check Vbatt related Components I/O NG ok ok Change SB ok Finished

  18. Before Power On-Battery Voltage 1. Use multi-meter to measure 1k ohm near the battery circuit, the value between 1mV~10mV is ok, out Of this range is NG. (According to Ohm theory: I=V/R, the Current leakage should be 1uA~10uA.) 1 2. If the value is NG, check the battery voltage is 3V. If not, change battery and measure the leakage current again. 2

  19. Before Power On-Battery Voltage 3. If the value is still NG, check the diode (RB715F) near battery is ok. If NG, please try to change it and measure again. 3 4. If the value is still NG, check which component use Vbatt. Most MB Vbatt connect to SB, I/O and ASUS ASIC. We can strip up the Vbatt pin of I/O and ASIC to confirm which component is . 5. If it’s not I/O or ASIC problem finally please try to change SB. 4

  20. AFTER POWER ON VOLTAGE

  21. After Power On-Voltage Distribution P5Q Deluxe Batt Vcore 1.8V W83667DHG CPU 3VSB VTTCPU DDR II VTTDDR 3.3V CPU_PLL 12V PCIEX16 5VDUAL USB 3VSB 3V Clock Gen 3V 3.3V SPI 5V PCI SLOT 3VSB 12V Eagle lake FAN 1.1V_NB +/-12V 1.8VDUAL 1.5V 5VDUAL KB/MS 3V 88SE6111 1.2V 1.8VSB 3.3V Marvell 8056 1.1VSB ICH10 1.2VSB 1.5V 3.3VA AD2000B 3VSB VTT_CPU 3.3V 3V 12V PCIEx1 3VSB 3.3V 3.3VSB Q-Switch Batt 1.8V 3.3V

  22. After Power On-Voltage Distribution M4A79T DELUXE

  23. After Power On-Linear & Switch Regulator introduction • 1. Linear Regulator – Lower Cost and Higher heat. • e.g. LAN voltage, FAN. • 2. Switch Regulator – Higher Cost and Lower heat. • e.g. VCORE, Memory voltage. Switch Regulator Linear Regulator

  24. After Power On-Linear & Switch Regulator introduction • MOSFET • N channel, Current high • If G is hi, the voltage in D should transfer to S. • P channel, Current low. • If G is lo, the voltage in S should transfer to D. A B Hi A B Lo

  25. After Power On-Typical Linear Regulator Linear Regulator

  26. After Power On-Typical Linear Regulator LM324 Diagrams Power Amplifier Operational Amplifiers Reference voltage

  27. After Power On-Typical Linear Regulator • IN+ = IN-, +1.5VSB REF (12th pin)= +1.5VSB FB (13th pin) • If 13th pin (Feedback) were lower than 12th pin (Reference), the 14th pin will make VG hi, meanwhile MOSFET is working till IN 4 - = IN4 +. 1. Input Output 3. Hi 2. 4. 5. 6.

  28. After Power On-Typical Switch Regulator Switch Regulator Switch Regulator

  29. After Power On-Typical Switch Regulator Iout 12 VIN VCC t High side ON Low side OFF I2 12Vin Iout t UGATE I2 PHASE t LGATE PGND I3 FB High side OFF Low side ON I3 GND t

  30. After Power On-Typical Switch Regulator 1. Input 4. High side ON Low side OFF 2. 6. High Gate Low Gate 5. High side OFF Low side ON Controller 3.

  31. VCORE

  32. After Power On-VCORE architecture & circuit Driver Driver Power Controller

  33. After Power On-VCORE architecture & circuit VID PWM CPU VCORE CONTROLLER VCORE DRIVER VCORE

  34. After Power On-VCORE architecture & circuit UGATE1 PWM1 LGATE1 12 VIN UGATE1 PWM2 VCC LGATE1 High side ON Low side OFF UGATE1 PWM3 I2 LGATE1 Controller Iout UGATE1 PWM4 UGATE LGATE1 PHASE Driver LGATE FB PGND High side OFF Low side ON I3 PWM GND

  35. After Power On-VCORE architecture & circuit PWM VCORE Control IC—ADP3180 VID

  36. After Power On-VCORE architecture & circuit Inside short circuit 1. 1.2V We should measure the Controller EN pin 1.2V in 11th at first time, if VCORE no work! 2. 12V 3. 1.2V

  37. After Power On-VCORE architecture & circuit +5V 0 (Low Level) ：0V 1 (High Level) ：5V 1K Switching Regulator 10K CPU VID4 VID3 Vcore VID2 VID1 VID0

  38. After Power On-VCORE architecture & circuit ADP3180 Output Voltage V.S. VID code

  39. Check whether boot after repairing? Check Vcore OK? All wave OK? ‧12V Impedance ‧Vcore Impedance ‧12V to Vcore Impedance No short? Check Power Supply work OK? After Power On-VCORE Voltage repair Flow Chart 1 START NO Yes Boot up Other Circuit fail: Example: PWM IC fail, RC small component or soldering fail. NO Yes Yes NO END Yes NO Check PWM IC EN PIN 1.25V OK? Other Circuit fail: Example: Socket fail 1.25VTT_CPU fail NO

  40. Check MOS DGS is OK? Check Driver Impedance is OK? After Power On-VCORE Voltage repair Flow Chart 12 Turn off Power Supply Remove Power Supply cable Remove all abnormal MOS which DGS is NG. NO Yes Remove Driver NO Yes

  41. ‧12V Impedance ‧Vcore Impedance ‧12V to Vcore impedance are all OK. Measure the Pad which MOS & Driver just been removed is OK? Measure MOS & Driver Impedance are OK. After Power On-VCORE Voltage repair Flow Chart 12 Other Circuit fail: Example: PWM IC fail, RC small component or soldering fail. NO Yes Measure MOS component which was just removed. Then record the defect MOS & Driver. Mount good MOS and Driver Other root cause like soldering short. NO Yes Other rootcause like Socket short or Soldering short. NO

  42. After Power On-VCORE Problem Debug Procedure (1) If no Output Check if both 5V and 12V are OK Check if POWER MOSFET (both UGATE/ LGATE) are not short Check all VIDs of Power Regulator are not high Check EN/FS of Power Regulator is not zero Volt

  43. After Power On-VCORE Problem Debug Procedure (2) If the output voltage wrong Check if VIDs of Power Regulator are wrong setting Check if the feedback resistor divider is wrong Check if UGATE and LGATE of Power Regulator with wrong voltage level Check if POWER MOSFET failure

  44. Thank You!

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