X550LD Repair Guide Apr/8/ 2015 John_jin GTSD - BLOCK DIAGRAM POWER FLOW POWER ON SEQUENCE AC POWER ON SEQUENCE DC POWER ON SEQUENCE Signal Measure Point-Bottom PSL8801 AC_IN_OC# 610 PJP8502 AC_BAT_SYS 502 42 PL8801 P_CHG_LX_30 506 44 PL8401 +1.5VO 352 30 PL8200 +1.05VSUSO 331 19.PD8201 VA_DSW_PWRGD 686 37 PL8003 VCCIN 33 36.R0620 VCCIN_EN 281 12.PD8200 +3VSUS_ON 532 38.Q0601 CORE _PWRGD 557 14 R0616 +3VSUS 375 16 R7710 +12VSUSO 1309 20 R2510 SUSACK_R# 524 31.D7705 +1.05VS_PWRGD 319 35.Q0602 ALL_SYSTEM_PWRGD 493 43.PL8502 +NVDD 72 25.PR8324 PM_SUSC# 407 15 PL8101 +5VO 531 5.D3204 +3VA_EC 494 34.SL5805 +1.35V_PWRGD491 28.PQ9109 SUSB_EC# 488 6.D3204 EC_RST# 696 33 PL8301 +1.35VO 130 32 VT11 P_+1.5VS_PWRGD 550 8.PL8100 +3VADSWO 481 PC8134 +5VAO 560 11.VT257 PCH_SLPSUS# 403 3.PSL8101 +3VAO 512 27.PQ9105 SUSB_EC# 598 17.D5801 +3VSUS_PWRGD 705 18.D5801 +5 VSUS_PWRGD 702 29.R3013 PM_SLP_A# 396 7.PR8113 P_+3VSUS_EN_OC 586 13 PQ8108 +5VSUS_ON 690 Signal Measure Point-Top 39.R2539 PM_PWROK 578 22.C6802 PWR_SW# 584 41.U7002 BUF_PLT_RST# 486 10.D2505 ME_AC_PRESENT 708 9.D2503 PCH_DPWROK 581 40.R2538 PM_SYSPWROK 578 26.R2514 PM_SUSB# 422 23.R3041 PM_PWRBTN# 535 24.Q3002 SUSWARN# 405 21.VT1264 PM_RSMRST# 575