Asus BU403UA repair guide

POWER ON SEQUENCE... AC POWER ON SEQUENCE.

Jan/27/ 2016 Asus BU403UA Repair Guide

POWER FLOW

POWER ON SEQUENCE

AC POWER ON SEQUENCE

Signal Measure Point-Bottom

29PL8102 VCCCORE 10

32 PL8601 +1.2VO 46

36 PL8901 P_CHG_LX_30 185

33.PL8701 +3VADSWO 353

2 PC8705 +5VAO 512

34 PL8702 +5VSUSO 462

30 PL8101 VCCGT 9

31 PL8103 VCCSA 21

35 PL8302 +1.0VSUS 49

7.D2501 +3VA_DSW_PWRGD 502

22.R5757 SUSB_EC# 744

25.D2501 IMVP8_PWRGD 571

26.R2539 PM_PWROK 751 6.PSL8703 +5VSUS_ON 586

19.PR8699 PM_SUSC# 590

20.R5810 PM_SUSB# 585

21.PD8604 +1.2V_ON 578

24.R5804 VCCIO_PWRGD 477

6.PSL8702 +3VADSW_ON 575

21 PD8801 SUSC_EC# 539

23.R5817 +1.2V_PWRGD 513

23.R5816 VCCST_PWRGD 513 24.R5806 ALL_SYSTEM_PWRGD 477

Signal Measure Point-Top

1 PC8729 AC_BAT_SYS 482

9 VT313 PM_SLP_SUS# 595 16.R3040 SUSWARN# 692

4.D3201 EC_RST# 759

11.VT842 +1.8VSUS_PWRGD 608 12.VT858 +1.0VSUS_PWRGD 556

3.Q3202 PS_ON 465

13.VT60 +3VSUS_PWRGD 480

2 PSL8704 +3VAO 457

5.D2505 ME_AC_PRESENT 747

8.R2553 DPWROK_EC 703

10 VT824 +VSUS_ON 521 11.VT837_P_3VSUS_PWRGD 479

14.R2542 PM_RSMRST# 745

14.R2542 PM_RSMRST#_PCH 793 15.R2513 PCH_SUSACK# 552

17.C6506 PWR_SW# 702

18.SL2518 PM_PWRBTN# 587

27.R2538 PM_SYSPWROK 737

28.SL3302 BUF_PLT_RST# 504