X550DP Repair Guide Nov/25/ 2014 John_jin GTSD - BLOCK DIAGRAM POWER FLOW POWER ON SEQUENCE Signal Measure Point-Bottom CE8010 AC_BAT_SYS 31.L8800 +CHG 30.L8201 +1.2VO 19.SP0407 CPU_PWRGD 29.L8401 +0.95VS_VGA_O 24.L8000 +VCORE 26.L8701 +VGA_LL1 23.L8300 +1.35VO 25.L80001 +CPU_VDDNB 9.R6602 PWR_SW# 10.D2100 PM_RSMRET# 8.SP2107 PM_RSMRST# 27.L8100 +5VO 15.VT905 ALL_SYSTEM_PWRGD 28.L8101 +3VO 6.VT819 5VSUS_PWRON Signal Measure Point-Top 2.R8802 AC_IN_OC# 16.VT726 CPU_VRON 22.C0414 CPU_RST# 17.VT897 VRM_PWRGD 18.VT1234 PM_PWROK 11.R3007 PM_SUSC# 21.SP2001 BUF_PLT_RST# 13.R3006 PM_SUSB# 14.D9201 SUSB_EC# 12.Q5706 SUSC_EC# 7.D9202 5VSUS_PWRGD 20.R2005 A_RST# 5.JP9303 VSUS_ON 4.D3202 EC_RST# 3.D3202 3VA_EC ... Point-Bottom CE8 01 0 AC_BAT_SYS 31. L8 800 +CHG 30. L82 01 +1. 2VO 19 .SP0 407 CPU_PWRGD 29.L84 01 +0. 95VS_VGA_O 24.L 800 0 +VCORE 26.L87 01 +VGA_LL1 23.L8 300 +1. 35VO 25.L 800 01 +CPU_VDDNB 9.R6 602 PWR_SW# 10 .D 2 10 0 PM_RSMRET#... 18 .VT1234 PM_PWROK 11 .R 300 7 PM_SUSC# 21. SP 20 01 BUF_PLT_RST# 13 .R 300 6 PM_SUSB# 14 .D92 01 SUSB_EC# 12 .Q5 706 SUSC_EC# 7.D9 202 5VSUS_PWRGD 20. R 200 5 A_RST# 5.JP9 303 VSUS_ON 4.D3 202 EC_RST# 3.D3 202 3VA_EC... 8.SP 2 10 7 PM_RSMRST# 27.L 8 10 0 +5VO 15 .VT 905 ALL_SYSTEM_PWRGD 28.L 8 10 1 +3VO 6.VT 819 5VSUS_PWRON Signal Measure Point-Top 2.R8 802 AC_IN_OC# 16 .VT726 CPU_VRON 22.C0 414 CPU_RST# 17 .VT897 VRM_PWRGD 18 .VT1234