Samsung n820, S820, n850 Schematics Diagram
5-1 Main Board
5-1-1 Schematic Diagrams
Index
Sheet 1. Cover Sheet
Sheet 2. Clock Chip
Sheet 3. DIXON MMC-2
Sheet 4. Memory Serial Terminator
Sheet 5. SODIMM
Sheet 6. PIIX4e-1
Sheet 7. PIIX4e-2
Sheet 8. PIIX4e-3
Sheet 9. PC Card Controller
Sheet 10. PC Card Connector
Sheet 11. Flash ROM
Sheet 12. HDD & CD-ROM Connector
Sheet 13. Super I/O Controller
Sheet 14. SIO, PIO, CRT & TV-out(S-VHS)
Sheet 15. MICOM
Sheet 16. MICOM Sub
Sheet 17. USB, IR, Touch Pad & Key B’d
Sheet 18. Video Controller
Sheet 19. SGRAM & LCD Connector
Sheet 20. Docking Connector
Sheet 21. Mount Hole & Bypass Cap.
Sheet 22. Audio Chip & IrDA I/F
Sheet 23. PWR Conn. Ext FDD
Sheet 24. Modem Connector
Sheet 25. Test Point
Sheet 26. Test Point
5-1S820/S850
5 Schematic Diagrams and PCB Silkscreen
5 Schematic Diagrams and PCB Silkscreen
S820/S8505-2
5-1-1(a) Main Board Schematic Sheet 2 of 26(Clock Chip)
4) Make trace of power pin and ground pin short and wider than width of chip pad.
7) No other signal trace across through the clock generator area.
2) Every power pins have a decoupling CAP direct connect it.
DNI
3) Ground pin directly connect to ground plane.
1) Don't place Clock chip near PCB edge. Place near PCB center and mounting hole.
Including crystal, clock chip, decoupling capacitor, damping and filter.
Make the clock generator area more "clean"
6) Clock trace must have damping resistor and filter Capacitor near to clock chip output pin.
5) Don't place via between clock chip power pin and decoupling CAP.
CK100-M
Make the shortest trace.
CKBUF-M
D
C
B
A
D
C
B
A
12
34
1234
5 Schematic Diagrams and PCB Silkscreen
S820/S850
5-1-1(b) Main Board Schematic Sheet 3 of 26(DIXON MMC-2)
Must equal trace length from node A to GCLKIN
A :
Trace length from node A to AGP_DEVICE
DNI
D
C
B
A
D
C
B
A
12
34
1234
5-3
5 Schematic Diagrams and PCB Silkscreen
S820/S8505-4
5-1-1(c) Main Board Schematic Sheet 4 of 26(MEMORY SERIAL TERMINATOR)
D
C
B
A
D
C
B
A
12
34
1234
MA(11) : Disable pipe lining (X)
MA(6) : Enable Mobile-Low Power GTL+ (0)
MA(10) : Enable Quick-start Mode (0)
Not Install
MA(9) : Disable AGP Mode (X)
MA(12) : Enable 100Mhz (X)
MA(7) : Tri-state some memory signals (X)
5 Schematic Diagrams and PCB Silkscreen
5-5S820/S850
5-1-1(d) Main Board Schematic Sheet 5 of 26(SODIMM)
DNI
DNI DNI DNI
D
C
B
A
D
C
B
A
12
34
1234
5 Schematic Diagrams and PCB Silkscreen
S820/S8505-6
5-1-1(e) Main Board Schematic Sheet 6 of 26(PIIX4e-1)
D
C
B
A
D
C
B
A
12
34
1234
5 Schematic Diagrams and PCB Silkscreen
5-7S820/S850
5-1-1(f) Main Board Schematic Sheet 7 of 26(PIIX4e-2)
: MMO3_VRPWRGD
Option
All components in the Box
near PIIX4E
if CPU_type is
Minicartridge
MMO
: KBC3_PWRGDPX4
need to be placed
D
C
B
A
D
C
B
A
12
34
1234
5 Schematic Diagrams and PCB Silkscreen
S820/S8505-8
5-1-1(g) Main Board Schematic Sheet 8 of 26(PIIX4e-3)
D
C
B
A
D
C
B
A
12
34
1234
Audio AD 23
INTA* Docking, CardBus, Modem
INTB* Docking, Cardbus, Lan
Reserved
PREQA* CardBus
Modem AD 24
PREQ 3 CardBus
PREQ 1 Docking 1
LAN AD 25
Programmable Interrupt Request
INTC* Video, Audio
PIIX4E Resource Table
CardBus AD 19
PIIX4E AD 18
PREQB* Audio
INTD* USB
PREQ 4 Audio
IDSEL
PREQC* Reserved
PC/PCI DMA Request
PCI BUS Request
PREQ 2 Modem / LAN
PREQ 0 Docking 0
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