Service manual
Schematic Diagrams
KBC-ITE IT8502E B - 37
B.Schematic Diagrams
KBC-ITE IT8502E
BAT_VOLT
0V
RX
VSHG_SEL 45
WLAN_SW# 30
KB-SO15
KB-SO7
KB-SO13
KB-SI0
KB-SI1
KB-SO9
KB-SI6
KB-SI4
KB-SO2
KB-SI3
KB-SO11
KB-SO8
KB-SO6
KB-SO14
KB-SI7
KB-SO12
KB-SO4
KB-SO1
KB-SO10
KB-SO5
KB-SI2
KB-SO3
KB-SI5
KB-SO0
MUTE_SW # 30
0_04 for M760T/TU
BKP1005HS121_04 for M740T/TU
EMI Solution
ME_W E# 19
CCD_SW# 30
3G_DET#
EC_VCC
PCLK_KBC
R208 *0_04
THERM_VOLT3
SMC_CPU_THERM
LED _IGPU#33
KB-SO1
KB-SO8
KB-SO15
KB-SO4
KB-SI 0
3.3VS 2,10,11,12,13,19,20,21,22,23,24,25,26,28,29,30,32,33,35,37,42,43,46
KB-SO7
KB-SO10
KB-SO6
KB-SO14
KB-SO0
KB-SI 3
X9 *32.768KHz
1 4
32
KB-SI 6
KB-SI 1
KB-SI 7
KB-SO11
KB-SI 2
KB-SI 5
KB-SO12
KB-SO5
KB-SO9
KB-SI 4
KB-SO13
KB-SO2
KB-SO3
C990318
R185 *10K_04_C
C296
0.1u_16V_Y5V_04
R192 15_1%_04
BAT_D ET
X2 32.768KHz
1 4
32
SMC_BAT
SMD_BAT
K/B MATRIX
FLASH
LPC
SMBUS
PS/2
PWM
UART
DAC
CLOCK
IT8502E
CIR
ADC
WAKE UP
PWM/COUNTER
LPC/WAKE UP
EXT GPIO
GP INTERRUPT
WAKE UP
GPIO
U14
IT8502E-J
WRST#
14
LPCCLK
13
LAD0
10
LAD1
9
LAD2
8
LAD3
7
LFRAME#
6
( PD )LPCPD#/WUI6/GPE6
17
SERIRQ
5
ECSMI#/GPD4( PU )
15
ECSCI#/GPD3( PU )
23
GA20/GPB5
126
KBRST#/GPB6( PU )
4
KSI0/STB#
58
KSI1/AFD#
59
KSI2/INIT#
60
KSI3/SLIN#
61
KSI4
62
KSI5
63
KSI6
64
KSI7
65
KSO0/PD0
36
KSO1/PD1
37
KSO2/PD2
38
KSO3/PD3
39
KSO4/PD4
40
KSO5/PD5
41
KSO6/PD6
42
KSO7/PD7
43
KSO8/ACK#
44
KSO9/BUSY
45
KSO10/PE
46
KSO11/ERR#
51
KSO12/SLCT
52
KSO13
53
KSO14
54
KSO15
55
VCC
11
VSTBY
26
VSTBY
50
VSTBY
92
VSTBY
114
VSTBY
127
VSTBY
121
VBAT
3
AVCC
74
PS2CLK0/GPF0( PU )
85
PS2DAT0/GPF1( PU )
86
PS2CLK1/GPF2( PU )
87
( PD )TMRI0/W UI2/GPC4
120
( PD )TMRI1/W UI3/GPC6
124
LPCRST#/WUI4/GPD2( PU )
22
( PD )WUI5/GPE5
35
PWRSW/GPE4( PU )
125
RI1#/WUI0/GPD0( PU )
18
RI2#/WUI1/GPD1( PU )
21
( PD )RING#/PWRFAIL#/LPCRST#/GPB7
112
TXD/GPB1( PU )
109
RXD/GPB0( PU )
108
( PD )CTX/GPB2
123
PS2DAT1/GPF3( PU )
88
PS2CLK2/GPF4( PU )
89
PS2DAT2/GPF5( PU )
90
( PD )TACH0/GPD6
47
( PD )TACH1/GPD7
48
PWM0/GPA0( PU )
24
PWM1/GPA1( PU )
25
PWM2/GPA2( PU )
28
PWM3/GPA3( PU )
29
PWM4/GPA4( PU )
30
PWM5/GPA5( PU )
31
PWM6/GPA6( PU )
32
PWM7/GPA7( PU )
34
ADC0/GPI0
66
ADC1/GPI1
67
ADC2/GPI2
68
ADC3/GPI3
69
ADC4/GPI4
70
ADC5/GPI5
71
ADC6/GPI6
72
ADC7/GPI7
73
VSS
1
VSS
12
VSS
27
VSS
49
VSS
122
VSS
113
AVSS
75
CK32KE
2
CK32K
128
DAC3/GPJ3
79
DAC2/GPJ2
78
DAC1/GPJ1
77
DAC0/GPJ0
76
( PD )EGCS#/GPE2
83
( PD )EGCLK/GPE3
84
( PD )EGAD/GPE1
82
GINT/GPD5( PU )
33
L80LLAT/GPE7( PU )
20
VSS
91
DAC5/GPJ5
81
DAC4/GPJ4
80
PWUREQ#/GPC7( PU )
16
( PD )CR X/GPC 0
119
( PD )KSO16/GPC3
56
( PD )KSO17/GPC5
57
( PD )ID0/GPH0
93
( PD )ID1/GPH1
94
( PD )ID2/GPH2
95
( PD )ID3/GPH3
96
( PD )ID4/GPH4
97
( PD )ID5/GPH5
98
( PD )ID6/GPH6
99
( PD )ID7/GPG1
107
SMCLK0/GPB3
110
SMDAT0/GPB4
111
SMCLK1/GPC1
115
SMDAT1/GPC2
116
SMCLK2/GPF6( PU )
117
SMDAT2/GPF7( PU )
118
FLFRAME#/GPG2
100
FLAD0/SCE#
101
FLAD1/SI
102
FLAD2/SO
103
FLAD3/GPG6
104
FLCLK/SCK
105
( PD )FLRST#/WUI7/TM/GPG0
106
( PD )L80HLAT/GPE0
19
C278
12p_50V_NPO_04
U13
EN25P05-50GCP
CE#
1
SO
2
WP#
3
VSS
4
SI
5
SCK
6
HOLD#
7
VDD
8
C305 1u_16V_X5R_06
R178 10K_04
R198 4.7K_04
C307
1u_16V_X5R_06
R191 15_1%_04
0_04 FOR IT8512CX/EX
0.1U_04 FOR ITE8512-J(ITE8502-J W/0 CIR)
EC Cost Down
C294
0.1u_16V_Y 5V_04
D7
BAV99 RECTIFIER
A
C
AC
R215 0_04
R213 *10M_04
C272
0.1u_16V_Y5V_04
J_KB2
85201-24051
24
23
22
14
12
11
21
8
20
19
6
5
18
4
17
10
9
7
3
2
1
16
15
13
NC3 SHORT
C251 0.1u_16V_Y5V_04
C605
0.1u_16V_Y5V_04
D8
BAV99 RECTIFIER
A
C
AC
D9
BAV99 RECTIFIER
A
C
AC
C281
12p_50V_NPO_04
R216 * 10_04
C295 0.1u_16V_Y5V_04
R175 47_04
C603
*.1U_16V_04
LED_DGPU# 33
C249
10u_10V_Y5V_08
R188 47_04
KBC_SPI_SO_R
KBC_SPI_SCLK_R
KBC_HOLD#
C306 *.1U_16V_04
.
L20 HCB1005KF-121T20
SPI_VD D_1
.
L40
HCB1005KF-121T20
512Kbit
C602
*. 1U_16V_04
KBC_FLASH
R217
100K_04
KBC_SPI_SCLK
KBC_SPI_SO
KBC_SPI_CE#_R
KBC_SPI_SI_R KBC_SPI_SI
KBC_SPI_CE#
J_KB1
*85201-24051
24
23
22
14
12
11
21
8
20
19
6
5
18
4
17
10
9
7
3
2
1
16
15
13
R177 100_04
R206 4.7K_04
R219 *0_04
R174 4.7K_04
R179 10K_04
BAT_VOLT
NC1
SHORT
C253 1u_16V_X5R_06
R186 10K_04
C304 *10P_50V_04
C606
0.1u_16V_Y5V_04
R187 10K_04
R190 1K_04
D10
BAV99 RECTIFIER
A
C
AC
C604
0.1u_16V_Y5V_04
KBC_AVDD
VDD3
VDD3
VDD 3
VDD3
KBC_AGND
KBC_AGND
VDD3
VDD3
3.3VS
SCI# 24
DD_ON 37,38
VDD 3
SWI# 21
SMI# 24
KBC_RST# 24
VCORE_ON 43
CHG_EN 45
PWR_BTN# 21
3G_EN 29
CCD_EN 29
RSMRST# 21
CPU_FANSEN 30
VDD3 19,28,30,33,37,38,44,45
ALL_SY S_PWRGD 12,21
BT_DET# 28,33
WLAN_DET# 28
BRIGHTNESS12
SUSB# 21,28,31,35,39
SUSC# 21, 40
SUS_PWR_ACK 21
BAT_VOLT45
BAT_DET45
VGA_SW#33
OPTIMUS_MODE33
TP_D ATA33
CCD_DET#29
LID_SW#12,30
SERIRQ19,29
LPC _AD 019,29
SMD_BAT30,45
SMC_BAT30,45
LPC _AD 119,29
LPC _AD 219,29
LED_PWR#33
TP_CLK33
LPC _AD 319,29
LPC_FRAME#19,29
LED _BAT_CH G#33
LED_CAP#33
LED_BAT_FULL#33
LED_NUM#33
BUF_PLT_RST#4,23,28,31,32
KBC_MUTE#35
BEEP35
LED_SCROLL#33
3G_DET#29
PWR_SW#37
PCLK_KBC23
CPU_FAN30
AC_IN#17,21,45
LED_ACIN#33
BKL_EN12
BT_EN28,33
PME#23
WLAN_EN28,30
80CLK28
GA2024
80D ET#28
3IN128
PCLK_KBC_R
INT16 30
dGPU_PWR_EN#
3G_DET#
BAT_VOLT_R
80DET#
BAT_VOLT_R
PCLK_KBC
KBC_WRESET#
CUR_SENSE_R
LCD_BRIGHTNESS
KBC_BEEP
3IN1
LOW ACTIVE
SMD_BAT
MODEL_ID
80CLK
SMC_BAT
CCD_DET#
BAT_DET
dGPU _R ST#13
EC MODULE CHOOSE (FOR DIFFERENCE K/B TYPE)
C990323
CCD_DET#
KBC_SPI_*_R = 0.1"~0.5"
KBC _SPI_CE#
NB_ENAVDD12,22
LCD_BRIGHTNESS
B5100B4100
EC_VGA_ALERT#17
dGPU_PWR_EN#13,17,39
KBC _SPI_SI
80CLK
3IN1
80DET#
J_80DEBUG1
88266-05001
1
2
3
4
5
VDD3
KBC _SPI_SO
CK32K
CK32KE
KBC _SPI_SCLK
3G_POWER29
MODEL_ID
del r180 10k C990317
del LAN_CABLE_DETECT C990317
H_PECI4,24
1
MODEL_ID
3.3VV1.0
R163 10K/ R171 X
VER.
VOLTAGE
J_KB1
R163 X /R171 10K
SMC_CPU_THERM3,20
SMD_CPU_THERM3,20
SMD_CPU_THERM
SMC_CPU_THERM
SMD_VGA_THERM17
SMC_VGA_THERM17
SMD_VGA_THERM
SMC_VGA_THERM
24
R240 *0_04
EC_VSS
RX
dGPU_RST#
KBC_WRESET#
??BAT?
Sheet 36 of 53
KBC-ITE IT8502E