NEC Barracuda Service Manual page 166

5
POWER SOURCE CPU CORE 1.75V
VCC_IN
VCC_IN
R102 U25
1M
5 1
C136
VIN SW
0402
10U
0805 5%
D
ITH/RUN
4
ITH/RUN
R103 2 3
GND VFB
5.1K
0402
LTC1701
5%
D27
C139
330P
0402
50V
ITH/RUN
Q23
D 2N7002
S
B
11 SA_PWR_EN#
C
BATTERY COVER REMOVE DETECTION
BATTERY COMPARE
R380 0 R381 0/NA
VCC_IN
1 2 1 2
U39
C185
XC61CCC3402MR
1U
0603
6TPB47M
B
VCC_3VSB
VCC_3VSB
R332
100K
BAT_FAULT_IRQ#
G
4 BAT_FAULT_IRQ#
Q22
ABC2133PII
IRLML6402
SW7
A
5
4
L13
10UH
Murata-LQH3C
1 2
VCC_CORE
20%
R138
4.02K/1%
0402
1%
C138
+ 47U
C137
3216/TT 0.1U
6.3V
0402
R141
16V
10K/1%
M1FS4
0402
1%
VOUT= 1.25 * ( 1 + 4.02K / 10K )=1.7525
This is
3.4V
Part
OPEN DRAIN
VCC_3VSB
G
Q53
IRLML6402
S D 1
Q54
G 2
IRLML6402
R424 R417
100K 100K
3,5,11 SA_PWR_EN
PROTECT
S D
Q19
G
IRLML6402
R286
100K
3,5,11 SA_PWR_EN
R418
100K
4
3
VCC_3VSB
D2
A K
M1FS4 R42
499
0603
5%
C133
10U R407
0805 499
+80-20% 0603
5%
BT1
ML1220T13 SW8
12V/0.1A
00221174MM
13 VIN_CONTROL#
7 BL_ADJ_U/D#
7 BL_ADJ_INC#
VCC3
VCC_3VSB
U47
VCC
4
SA_BATT_FAULT 3,5
GND
AHC1G32DCK
SOT70
C238 AC-IN DETERCT
1U
0603
VCC3
VCC_P+ R152
100K
0402
5%
R151
AC_IN# 11
10K
0402
5%
D Q2
2N7002
S
B
R247
100K
0402
5%
3
2
BACK-UP BATTERY CIRCUIT
U26
6 1
C+ VOUT
BK_VCC 5 2
VIN GND
4 3
C- SHDN
C132
1U LTC1754_3.3V-SOT26
0603
BK_VCC 11
R411
C228
10
10U
1
0603 0805
+80-20%
R379 0/NA
2
1 2
R412
10
0603
DISCHARGE_COLD_BOOT# 4
L19
10UH
Murata-LQH3C
1 2
VCC3
20%
U38
C168
10U 6
VIN SW
0805
VCC3 +80-20%
5
7 BL_ON/OFF#
SHDN GND
4
R_SET LED
U37
LT1932-SOT26
R12
2 3
U/D RH/VH
510
1
INC
0402
7 5
CS RW/VW
1%
8 6
VCC RL/VL
4
VSS
X9015
MSOP8
VCC_3VSB
15 BACK_DET
VCC_3VSB VCC_P+
VCC_IN
U49
XC61CCC3402MR/NA R428 R429
100K/NA 0 D Q51
2N7002
B S
R416
100K
MiTAC International Corp.
2
1
VCC_3VSB
Q52
IRLML6402
D S
D
G
BACK_DET#
C135
10U
0805
+80-20%
R378
0
PROTECT
C
D14
1 A K
J7
M1FS4 R312 0
2 1 2 1
1
R313 100
1 2 2
2
3 1 R314 0 2 3
3
R315 100
1 2 4
4
GND1
GND1
C4 GND2
GND2
10U
0805
CONN_LED
+80-20%
LCD BACKLIGHT CONTROL
B
VCC_3VSB
R414
100K
BACK_DET#
R415
100K Q50
2N7002
D
B S
SW9
ABC2112P
A
PCB P/N :316142200001
PCB;PWA-BARRACUDA/MAIN BD
Project Title
PWA;PWA-BARRACUDA/MAIN BD
Pag Title
CPU CORE,BL,BACK BATT
Document 411142200001 Rev
01
Number
, 27, 200 1
星期四 十二月
Date: Sheet 14 of 16
1