Schematic Diagrams
B - 1
B.Schematic Diagrams
Appendix B: Schematic Diagrams
This appendix has circuit diagrams of the W251HPQ/W251HPQ-C/W251HNQ/W251HNQ-C/W255HP/W255HN/
W258HPQ/W258HPQ-C/W258HNQ notebook’s PCB’s. The following table indicates where to find the appropriate
schematic diagram.
Diagram - Page Diagram - Page Diagram - Page
System Block Diagram - Page B - 2 PCH 1/9- RTC, HDA, SATA - Page B - 19 5VS, 3VS, 3.3VM, 1.5VS CPU - Page B - 36
Processor 1/7-DMI, FDI, PEG - Page B - 3 PCH 2/9- PCIE, SMBUS, CLK - Page B - 20 VDD3, VDD5 - Page B - 37
Processor 2/7- CLK, MISC - Page B - 4 PCH 3/9- DMI, FDI, PWRGD - Page B - 21 Power 0.85VS, 1.8VS, PEX VDD - Page B - 38
Processor 3/7- (DDR3) - Page B - 5 PCH 4/9- LVDS, DDI, CRT - Page B - 22 POWER 1.5V/1.05VS/0.75V - Page B - 39
Processor 4/7- Power - Page B - 6 PCH 4/9- OCI, USB, RSVD - Page B - 23 POWER VCORE1 - Page B - 40
Processor 5/7- GFX PWR - Page B - 7 PCH 6/9- GPIO, CPU - Page B - 24 POWER VCORE2 - Page B - 41
Processor 6/7- GND - Page B - 8 PCH 7/9- PWR - Page B - 25 Power VGA NVVDD - Page B - 42
Processor 7/7- RSVD - Page B - 9 PCH 8/9 POWER - Page B - 26 AC IN, CHARGER - Page B - 43
DDR3 SO-DIMM_0 - Page B - 10 PCH 3/9- GRD - Page B - 27 AUDIO BOARD - Page B - 44
DDR3 SO-DIMM_1 - Page B - 11 WLAN 3G MINI PCIE - Page B - 28 CLICK BOARD - Page B - 45
PANEL, INVERTER, CRT - Page B - 12 CCD, TPM, MULTI CON - Page B - 29 W251HPQ POWER SW BOARD - Page B - 46
VGA PCI-E Interace - Page B - 13 USB2.0, USB3.0 NEC - Page B - 30 W270HU BRIDGE ODD BOARD - Page B - 47
VGA Frame Buffer Interface - Page B - 14 Card Reader (JMC251 C) - Page B - 31 W270HU POWER SW BOARD - Page B - 48
VGA Frame Buffer A - Page B - 15 SATA ODD, LED, USB CHARGE - Page B - 32 Power Diagram - Page B - 49
VGA Frame Buffer C - Page B - 16 HDMI, RJ45 - Page B - 33 Power On SEQ - Page B - 50
VGA I/O - Page B - 17 AUDIO CODEC ALC269 - Page B - 34
VGA NVVDD Cecoupling - Page B - 18 KBC-ITE IT8518E - Page B - 35
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