Power On Sequence
8
Power On Sequence Sephiroth Kwon GRMA 26-05-2009
description
Power On Sequence. Sephiroth Kwon GRMA 26-05-2009. OUTLINE. General Power On Sequence Power On Sequence (P5Q3) Power On Sequence (M3N78-VM) No Power Problem Debug Point. General Power On Sequence. 3VSB. PWRBTN. 5VSB. 1. 1/0. 1. South Bridge. PWRBTN. 0. PSON#. ATX TOP VIEW. - PowerPoint PPT Presentation
Transcript of Power On Sequence
Power On Sequence
Sephiroth Kwon
GRMA
26-05-2009
OUTLINE
• General Power On Sequence• Power On Sequence (P5Q3)• Power On Sequence (M3N78-VM)• No Power Problem Debug Point
General Power On Sequence
+ 12
5VSB
PWOK
GND
+ 5
GND
GND
+ 3V
+ 5
+ 3V+ 3V
- 12V
GND
PSON
GND
GND
GND
- 5
+ 5
+ 5
5VSB to 3VSBLinear Reg.
Cap./Res.
5VSB1
3VSB
1
PWRBTN
1/0
PWRBTN0
PSON
0
0
ATX
TOP VIEW
PANNEL
PSON Pull low circuit
SouthBridge
Super I/O
IT8282
PSON#
General Power On Sequence
+ 12
5VSB
PWOK
GND
+ 5
GND
GND
+ 3V
+ 5
+ 3V+ 3V
- 12V
GND
PSON
GND
GND
GND
- 5
+ 5
+ 5
North BridgePCI SLOT
PWRBTNPANNEL
Circuit
Circuit
South Bridge
CPU SOCKET
PSON
PG1
PWROK
PCIRST
CPURST
IDE SLOT
IDERST
(1)
(2)
(3)
(4)
(5)
Power On Sequence (P5Q3 Sample)
Super I/O
ICH10R
GMCHUSER PRESS
CRTL+ATL+DEL
USER PRESSPOWER BTN
EPU
User pressRest
button
POWERSUPPLY
LANCPU
TPM
JMB363
VA6308P
PCI SLOT
O_
KB
_R
ST
# O_
PW
RO
K7O_
PW
RB
TN 4S
_S
LP
S4
#
5
S_
SL
PS
3#
5O_
RS
MR
ST
#2
7
P_VRM_GD
O_PWROKO_PWROK_NB7 7
B_ATX_PWROK
O_PSON#6
3
O_PWRBTNIN#
User clearCMOS
S_TRCRST#
1
RSTCON#
8
H_CPUPWRGD
VC
OR
E
S_PLTRST#
8
S_PCIRST#
8
PCI_PCIEX1
PCI_PCIEX16
S_PLTRST
S_PLTRST
H_
CP
UR
ST
#
10
O_PCIRST#_PCIEX1_123
O_PCIRST#_SLOT
9
O_PCIRST#_PCIEX16_129
Power On Sequence(M3N78-VM)
ATX Power
SIOITE8712F
MCP78
CPU PCI SLOT 1,2
PCIE X1
VRM
PCIE X16
IDE Port
13. PCI_RST#
13.PCIERST#
11. IDE_RST#
2. PWR_BTN#
13. PCIE_RST#
1.RS
MR
ST
#
4.SU
SC
#
3.SIO
_PW
RB
TN
#
4.SU
SB
#
5. PSON#
6. 12V
6. 5V6. 3V
11.SIO
_RS
T#
7.PW
RO
K_S
B
8. VCORE_EN
9. VCORE_PG
10. 1.2VHT_EN
14. CPU_RST#
12. CPU_PWROK#
No Power Problem Debug Point
POWER UP PROBLEM
1. Check if any burned components or traces
2. Check no voltages short with GND such as +5, +12 , +5VSB, +3, -12, +3VSB, VCORE 1.5V, 2.5V
3. Check Battery voltage
4. Check X’tal 32.768 KHz
5. Check 5VSB ,3VSB, PWRBTN#
6. Check PSON signal & related circuit
Thank You!
