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Appendix B: Schematic Diagrams
This appendix has circuit diagrams of the W250HU/W250HUQ/W251HUQ-C/W252HUM/W252HUM-C/W255HU/
W255HU-C/W255HUM/W255HUM-C/W258HUQ-C notebook's PCB's. The following table indicates where to find
the appropriate schematic diagram.
Diagram - Page
System Block Diagram - Page B - 2
CPU 1/7 (DMI, PEG, FDI) - Page B - 3
CPU 2/7 (CLK, MISC, JTAG) - Page B - 4
CPU 3/7 (DDR3) - Page B - 5
CPU 4/7 (Power) - Page B - 6
CPU 5/7 (Graphics Power) - Page B - 7
CPU 6/7 (GND) - Page B - 8
CPU 7/7 (RESERVED) - Page B - 9
DDR3 SO-DIMM_0 - Page B - 10
DDR3 SO-DIMM_1 - Page B - 11
LVDS, Inverter - Page B - 12
HDMI, CRT - Page B - 13
CougarPoint - M 1/9 - Page B - 14
CougarPoint - M 2/9 - Page B - 15
CougarPoint - M 3/9 - Page B - 16
CougarPoint - M 4/9 - Page B - 17
CougarPoint - M 5/9 - Page B - 18
Diagram - Page
CougarPoint - M 6/9 - Page B - 19
CougarPoint - M 7/9 - Page B - 20
CougarPoint - M 8/9 - Page B - 21
CougarPoint - M 9/9 - Page B - 22
New Card, Mini PCIE - Page B - 23
CCD, 3G, TPM - Page B - 24
Card Reader/LAN JMC251C - Page B - 25
LAN (JMC251C), SATA HDD, ODD - Page B - 26
USB 3.0 NEC, USB Charger - Page B - 27
KBC-ITE IT8518 - Page B - 28
LED, MDC, BT - Page B - 29
Audio Codec ALC269 - Page B - 30
USB, Fan, TP, Multi-Conn - Page B - 31
5VS, 3VS, 1.05VS, 1.5VS_CPU - Page B - 32
VDD3, VDD5 - Page B - 33
Power 1.5V/0.75V/1.8VS - Page B - 34
Power 1.05VS - Page B - 35
Diagram - Page
Power 0.85VS - Page B - 36
Power V-Core1 - Page B - 37
Power V-Core2 - Page B - 38
Charger, DC In - Page B - 39
Click Board - Page B - 40
Audio Board/USB - Page B - 41
Power Switch & LID Board - Page B - 42
External ODD Board - Page B - 43
Power Sequence - Page B - 44
Schematic Diagrams
Table B - 1
SCHEMATIC
DIAGRAMS
Version Note
The
schematic
dia-
grams in this chapter
are based upon ver-
sion 6-7P-W24H5-002.
If your mainboard (or
other boards) are a lat-
er
version,
please
check with the Service
Center for updated di-
agrams (if required).
B - 1
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