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LAPTOP POWER
Sequence
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CHIP LEVEL LAPTOP REPAIR COURSE
REPAIR
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Laptop Voltage requirement
Supply requirement on motherboard
ADOPTER INPUT VOLT 18V
VOLT
CPU 1V or 0.8v,1.05v(30amp)
0.8v,1.05v(30amp)
MCH 1.05v or 1.5v,1.8v
1.5v,1.8v
ICH 1.05 or 1.5v,1.8,3.3v,5v
1.5v,1.8,3.3v,5v
DDR 2 1.8v,3.3v,0.9v
Vin SIO(KBC) 3.3v
Clock chip 3.3v
BIOS 3.3v
Network chip 3.3v
Audio chip 3.3v
Batary Charging Voltage 10.8v Audio amp 5v
Temp. sensor 3.3v
Card reader 3.3v
LCD supply 3.3v
Hard disk 5.0v
DVD writer 5.0v
USB 5.0
Laptop Voltage requirement
Supply requirement on motherboard
ADOPTER INPUT VOLT 18V
VOLT
CPU 1V or 0.8v,1.05v(30amp)
0.8v,1.05v(30amp)
MCH 1.05v or 1.5v,1.8v
1.5v,1.8v
ICH 1.05 or 1.5v,1.8,3.3v,5v
1.5v,1.8,3.3v,5v
DDR 2 1.8v,3.3v,0.9v
Vin SIO(KBC) 3.3v
Clock chip 3.3v
BIOS 3.3v
Network chip 3.3v
Audio chip 3.3v
Batary Charging Voltage 10.8v Audio amp 5v
Temp. sensor 3.3v
Card reader 3.3v
LCD supply 3.3v
Hard disk 5.0v
DVD writer 5.0v
USB 5.0
Volt In
section
18volt adopter or
DCBAT B++
battery supply
BEFORE POWER ON
LED
INVERTER STEP RUN VOLTAGE GFX CPU
STEP DOWN 2 CORE VOLT CORE VOLT
DOWN 1
3.3VSUS 5VSUS
1 TO 1.2VOLT
3.3VOLT 5VOLT 1.8V 1.5V 1.05v 1VOLT APPROX
APPROX
30AMP
Always voltage
Laptop power sequence
Always voltage HDD
5v MOSFET
Step DVDW
Down 1
5v suspend voltage
ICH
3.3v AMP
BATT USB
SIO
BIOS
MOSFET
N
I NETWORK LCD VDD AC97 AUDIOCON
Suspend volt
T
L 1.05v
3.3volt suspend voltage
230volt O
input V
AC
Step MCH ICH
Down 2
Adopter
1.8v
DDR2
0.9v
CPU CORE volt
(VRM)
CPU
vcccore
inverter
CORE i3 Laptop power sequence
Always voltage HDD
5v MOSFET
Step DVDW
Down 1
5v suspend voltage
3.3v AMP
BATT USB
SIO
BIOS
MOSFET
N
I NETWORK LCD VDD AC97 AUDIOCON
Suspend volt
T
L 1.8V 3.3volt suspend voltage
230volt O
input V 1.05v
AC
Step PCH
Down 2
Adopter
1.5v
DDR3
0.75v
CPU Core
CPU CORE volt
CPU
(VRM)
GFX Core volt
LED
BACKLIGHT
Above 100 ohm
Battery Charging CPU Core
Vin voltage
supply
Above 100 ohm
GFX core
Above
100 ohm
3.3volt
1.5volt
Above
100 ohm
1.05volt
Above 15 ohm
Above
5volt 100 ohm 1.8volt
LAPTOP CHIPS VOLTAGES
CPU 2.5V (VDD)
3.3V
VCORE (1V Aprox
1.25V (VTT )
DDR 1 LAN 5V HDD
30Amp current)
3.3V (SPD) 3.3V
1.05VCCP
Vtt CPU
1.8V (VDD)
BIOS FAN
DDR 2 5V
0.9V (VTT DDR) 3.3V
1.05VCCP or 1.5v 3.3V (SPD)
MCH
1.8V North
bridge 1.5V (VDD) 5V USB 5V
3.3V DDR 3 AUDIO
0.75V (VTT )
3.3V
3.3V (SPD)
CARD
1.35V (VDD) 3.3V
DDR 3L READER 3.3V THERMAL
RTC 0.65V (VTT )
1.05VCCP 3.3V (SPD)
ICH
3.3V
South V IN DVD
LCD/ 3.3V CLOCK 5V
5V
bridge 3.3V LED
CORE i3,i5,i7
GFXCORE1.1V 3.3V
VCORE
GPU 1.05V
1.8V GFX Core i3 PCH
SIO GFXCORE
3.3V 1.8V
(KBC) CHIP CPU
1.5 V 1.05VCCP RTC
1.5V 1.5V
CORE I CPU 1 st Generation
CPUCORE 1.5volt
GFXCORE 1.05volt
CORE I CPU 2 nd & 3rd Generation
CPUCORE 1.5volt
GFXCORE
1.05volt
CORE I CPU 4th & 5th Generation
CPUCORE 1.35volt
GFXCORE
3.3volt 1.05volt
MOSFET
Drain
N-Channel
Gate
Source
Drain
P-Channel
Gate
Source
1,2
D1
D1
G1
8 1 G1
S1,D2
S1 S1,D2
5
D2
6 G2
G2 7 S2
3 2
S2
Pulse Width Modulator
18 volt
5v DC
Switching AC voltage
Smooth DC voltage
18 volt DC
5 volt DC
A
B 18volt
PWM 5volt
Pulse-width modulation control works by
switching the power supplied on and off
very rapidly. The DC voltage is converted to a
square-wave signal.
A
B
Sample pulse width modulator
+ve
enable
Output DC
PWM
Power good
-ve
feedback
Components in power unit
capacitor
coil
Mosfet
Diode
Adopter Input
230volt AC
Batary
Chip manufacturer
Charging v ISL
MAXIM
TI
RICHTEK
Adapter Battery
18 volt DC 10.8volt DC
Volt in output
VIN
B++
Voltage input and battery charging section VIN(DCBATB++)
Output
CURRENT SENSE RESISTER
1 2 5
18V DC
Adopter
MOSFET MOSFET MOSFET
Dc input
Ac ok CSSP CSSN
Dc Power for chip MOSFET
3 Battery
AC in
CELLS M
W
P
V in
4
ACPRESENT(AC OK) power MOSFET
CHGLED 10.8vDC T
I S
SMD U L
Bat
SIO SM BUS
drv
C
R
I
L
E
AC IN SMC C C
L N
O
Batt R O
I
T -
I
BATLOW N L
O
SMDATA C
SMCLOCK SM BUS
TEMP
PCH
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Voltage input and battery charging section
VIN(DCBATB++)
Output
1 2 5
18V DC
Adopter
MOSFET MOSFET MOSFET
Dc input
Ac ok CSSP CSSN
Dc Power for chip MOSFET
3 Battery
AC in
CELLS
V in
4
ACPRESENT(AC OK) power MOSFET
CHGLED 10.8vDC T
I S
SMD U L
Bat
SIO SM BUS
drv
C
R
I
L
E
AC IN SMC C C
L N
O
Batt R O
I
T -
I
BATLOW N L
O
SMDATA C
SMCLOCK SM BUS
TEMP
PCH
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Not powering on
VIN(DCBATB++) battery
Output
1 2 5
18V DC
Adopter
MOSFET MOSFET MOSFET
Dc input
Batt. drv
Ac ok CSSP CSSN
Dc Power for chip MOSFET
3 Battery
Not working on adopter
AC in
V in
4
ACPRESENT(AC OK) power MOSFET
CHGLED 10.8vDC T
I S
SMD U L
Bat
SIO SMC drv
C
R
I
L
E
C C
L N
O
Batt R O
I
T -
I
N L
BATLOW O
SMDATA C
SMCLOCK SMBUS
TEMP
Battery not detecting
ICH Communication between sio & battery Battery not charging
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adopter
battery
Some sample chip
Up to C2D CPU
3volt VCC 1
(cpu)
32.7KHZ
BIOS VR_ON (B
PWR_ON ( main_on, Run on)
KBC_PWRBTN SIO
3
6 SUSp_ON
2
N
T 4 3
S
_
5 4
S
B P _
R L P
T W S L
S P _ b S 3 VOLT VCC
_ M s _ c
R P u
s M s
M M
P P u
s
S
R RSMRST
PWRBTN
ICH PM_PWRBTN
SLP_S3
SLP_S4
POWER ON BUTTON SEQ.
STEP 2 TURN ON
CPU CORE ON
SLP_S4
SIO RSMRST
POWER BUTTON
ADOPTAR PRESENT
POWER BUTTON
TO PCH
SUSPEND ON
3volt VCC
32.7KHZ
Pin No 8 1
EC BIOS
VR_ON (cpu)
7 PWR_ON (Bridge, Ram supply)
2 KBC_PWRBTN Main on(sys on)
SIO
SUSP_ON
T
4 3
S
R
M N
S T
R B 3
R
5 S 4
W _
P
6 S
_
P L P
_ S L
M _ b S
s _ c
P M s
P u
s M
P u
s
PCH
POWER ON BUTTON SEQ.
Core i3 power sequence
S
W
1 S
W
R304 Y1
C345 R491
R490
R503
SIO
EC R105
ITE-8518 PCH
9
SUS_ON
RUN_ON
10 1
EC_PWROK 13
HWPG
3
VR_ON
12 11
Step down 1 voltage(always voltage)
V+ vin
18
v
LD05
LD03(VREG3) (VREG5)
3v Linear 5v Linear
regulator regulator
18v 18v
Vcc 5V
MOSFET
UG
vcc UG
MOSFET 5VALW
3VALW
3.3v 5v
3volt Osc Osc
LG PWM PWM LG
MOSFET MOSFET
BIOS
5 on
3 On
SIO PG signal
Enable
Step down 1 voltage(always voltage)
V+ vin
18
v
LD05
3volt LD03(VREG3) (VREG5)
3v Linear 5v Linear
regulator regulator
SIO 18v
Vcc 5V
p
s
p u
s
u
MOSFET
UG
vcc UG
MOSFET s
s
3VALW 5VALW 5VS
3VS
MOSFET 3.3v 5v MOSFET
Osc Osc
LG PWM PWM LG
MOSFET MOSFET
5 on
3 On
PG signal
V IN V OLTAG E Li nea r out pu t
Step down 1 voltage(always voltage)
V+ in
3v Out 5v Out LD05
LD03
Vcc
vcc
3VALW
5VALW
5v 3v
Osc Osc
PWM PWM
3 On
5 on r
e
l
l
o
r
t
n
PG signal
o
c
o
r
c
i
Enable M
Step down 2
1.8V & 1.05v voltage
V+ in
1.8 VOLT
OR
1.5 VOLT
0R
ENABLE
1.05v 1.05V0LT
SIO
osc
Power Good
RAM VTT Voltage
1.8V OR 1.5V 0.9V or 0.75
VTT Enable
CPU Core voltage
5Volt
V IN
1v 30Amp
VR_ON PWM
SIO
CPU VCORE
CPU
CPU
VRM PWRGD VRM V IN IN
V
PWM
CLK ENABLE
VID signal
1 Vin voltage
5volt
VCC
2
3
From SIO 1 v to 1.5v
VR_ON
6 VRM 5
Clock enable Core v
To SIO 4
VRM
6 power good Core i3
CPU
U
P
C
m GFX Core
o
r
f
l
a
n
g
i
s
D
I
V
GND
Power Block Diagram
230v AC
CPU Core 0.8v or 1v VCORE
volt
Battery Adopter
17
18
1
Volt In 0.9v
Step down 1.8v
2 14
S 1.05v
U
B
M E
S L
B 15
A 2
N
E
_
G MOSFET 3.3vSUS
H
C
On\off 12
VR_ON 16
switch 5vSUS
e 13 MOSFET
l SYS_ON
b
8 a SUSP 11
n
E
(SIO) 4 SLP_S5 Step
3.3VALWS
VRMPWRGD down 5
Enab 1 5VALWS
K
l sig O
a
t KBC G
P
s 6 3
y
r
c
z
h
3v supply
3VL
RSMRST 7
ICH
k
7
. PG 9 PWRBTN
2 PWRBTN
3 signal
SLP3,SLP4,
10
3 volt
SUS_PWRGD Power Block Diagram
MAIN_PWRGD 230v AC
GFX_PWRGD
CPU Core 0.8v or 1v VCORE
volt
Adopter 18
Battery
1
GFX 15
Volt In
1.8v
S E Step down
U L 1.05v 13
B B
A 2
M N N 0.9v
S E
_ I
C 15
G
H
A 2
C
MOSFET 3.3vSUS
VR_ON 17
GFX_ON 14 11
16 5vSUS
e 12 MOSFET
l SYS_on(Runon)
HWPG b
a SUSP 10
n
E
SIO Step
3.3VALWS
19 VRMPWRGD
l down 5
a Enab 5VALWS
t
s
y
KBC
sig
1
r SLP_S5
c 4
z 3
h
k
7
.
2
3v supply
RSMRST 6
ICH
3
On\off
PG 8 PM_PWRBTN
PWRBTN
switch signal
9 SLP3,SLP4,
3 volt
7
battery
Li-ion 3.6V 4500 Times charge/discharge
3.6v 3.6v 3.6v
2Amp
2Amp
3.6v 3.6v 3.6v
10.8volt 4amp
Battery connector
1 2 3456
Pin Signal Description Type
1 GND Ground
2 Temp Temperature monitor I
3 Clock SM Bus I/O
4 Data SM Bus I/O
5 NC No Connection
6 BAT_S Positive voltage power
In side the battery
clock
SM Bus
data
Interface
Temp sense
Dis-charging
Battery +ve
Sense &
control
-ve
charging
Battery
connector
Li-ion cell
Laptop Power
ALWAYS ON SUS_POWER POWER ON VRON
5V_AUX 5V
ICH ICH FAN
USB HDD
DVDW AUDIO
AC
ADOPTER
V IN 3.3V_AUX 3.3V
ICH ICH BIOS CLOCK
BATTARY
LAN LCD
THERMAL HDD
DDR2
1.8V
3.3V_ALWS
0.9V
MICOM
DDR2 VTT
5V_ALWS
1.05V
ICH MCH
CPU CORE
S4 / S5 S3 S0
POWER RAIL
INPUT SUPPPLY VIN
BATT 0r ADOPT B+
Linear output 3VL
pwm always voltage out 5VALW/3VALW
RSMRST from kcb to ich RSMRST
user press on button ON/OFF
pwrbtn signal to ich PWRBTN
ich to SIO SLP_S5
ich to SIO SLP_S4
SIO to power SYSON
1.8V
ich to SIO SLP_S3
kbc to power SUSP
5VS/3VS/1.05VS
kbc to power VR_ON
CPU_CORE
VRM Chip to KBC VRMPWRGD
KBC TO ICH CLPWROK) M_PWROK
Clock reset CL_RST
Clock power good CL_PWRGD
KBC TO MCH PM_PWROK
ICH TO CPU H_PWRGOOD
ich to mch PLT_RST (PCI_RST)
mch to cpu RESET
On/off
SW
POWER ON AND RESET SEQUENCE
18v adopter 10.8 Battary
Input Input 8
ON/OFF SLP4
SW 10
SLP3
Clock start
ACIN
PM_PWRBTN Clock 20
V In 9
CORE_V
CPU 23
SIO RSMRST
19 17 CPU_PWRGD
16 7 D
G
R
W
HWPG 15 22 M_PWRGD P t
_
K
C
e
s
e
1 SYS_ON (MAIN ON) 13
25
R
21 ECPWORK U D
P
C G
RST KBC_RST R
CKT PLTRST W
3 P
_
U
P
S VRMPWRGD C
W
L
A
6 S
U
MCH
_ S (VGATE)
3
D
O North Bridge
3 N
_
C BIOS
B
K 5 D
2 S G RSTIN CL_RST
_ R
P
L W 11
4 S P
Step 6 24
down 12 PLTRST
3.3v_ALWS 3.3V_SUSP
1 5 CL_RST
5V_ALWS 5v_SUSP CLK_PWRGD
SLP4/ 5
1.8v SLP3
Step To DDR
Down 0.9v 14
PWROK
15
2 1.05V 7 RSMRST
PWROK
ICH 23
South Bridge
3.3V
VR_ON 1.05V
CPU 17 CPU_CORE
Core
VRMPWRGD 18
VRMPWRGD
WIFI Card Test Point
CLJ 33MHZ
11
16
22
PLTRST
SM BUS
30,32
CPU RESET
R322
SIO
CPU
R313
R605
ECPWROK PCH
ADOPTER Battery
ALWS PWRGD
CLOCK
MAIN PWRGD
SUS PWRGD HWPG
PWRBTN 18
ACIN
13
D
D G
3 T G
R
R
Slp _S5 S W
Step R W P
T P
down 3.3VAL 2 ECPWORK 19 L