ViewSonic VS11755 Service Manual page 25

MCU
+ 0.8V -
D19 BAV70W/RoHS
2
VGA_5V
3
1
DVI_5V
+5V
+5V
R42
0402/10K/5%
GND_POWER
R21
0402/1K/5%
R23
VOL_PWM
0402/10K/5%
C16
0805/1u/25V/7
GND_POWER
綼
MCU
D14
2
RESET_MCU
3
1
BAV70W/RoHS
MCU_VDD
GND_POWER
2007.11.13 modify
Q8
BSS84-F
NVRAM
2 3
MCU_VDD
+ 0.24V -
D27 D28 D29
1 2 1 2 1 2
1N4148WS 1N4148WS
SX34
+ 0.79V - + 0.79V -
GND_POWER
PC-99 Circuit
MCU_VDD
R137
0402/1.5K/5%
R136
1
Q10
BSS84 0402/100R/1%
INV_ON/OFF INV_ON/OFF INV_ON/OFF INV_ON/OFF INV_ON/OFF INV_ON/OFF
INV_ON/OF F
R138
MCU_VDD OPEN/0402/10M/5%
GND_POWER
INV_ADJ
INV_SW
LED_GRN
MCU_VDD
LED_ORG
R111 R112
0402/2.2K/5% 0402/2.2K/5%
R34
DVI_SCL
R33
DVI_SDA
R38
VGA_SCL
R39
VGA_SDA
R113 R114
0402/2.2K/5% 0402/2.2K/5%
C17
1206/10u/16V/Y/RoHS
R44 MCU_VDD
0402/10K/5%
MCU_VDD
R13 R14 R15 R16 R17 R18
0402/10K/5%
0402/10K/5%
0402/10K/5%
0402/10K/5%
0402/10K/5%
0402/10K/5%
PWR_SW
PWR_SW
MENU MENU MENU MENU
MENU
KEY_UP
KEY_UP
KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN KEY_DOWN
KEY_DOWN
AUTO_ADJ
AUTO_ADJ
SOURCE_SELECT
SOURCE_SELECT
MCU_VDD
R48 R49
NC/0402/4.7K/5%
U5
NC/0402/4.7K/5%
1 8 C22
A0 VCC
WP
2 7 NC/0402/100n/16V/Y
A1 WP
IICSCL
3 6 R50 NC/0402/100R/5%
A2 SCL
IICSDA
4 5 R51 NC/0402/100R/5%
GND SDA
NC/24LC16BT-I/SNG/RoHS
MCU_VDD
MCU_VDD
DVI_HPD
R32
MCU_VDD C15 +
100uF /16V 0402/10K/5%
GND_POWER
R26 R27
MCU_VDD
R31
36
P1.4
1 35
P5.5/PWM5 P1.5
0402/22R/5% 2 34
P5.6/HSCL2 P1.6
0402/22R/5% 3 33
P5.7/HSDA2 P1.7
4 32
RST NC
0402/22R/5% 5 31
HSCL1/RXD/P3.0 NC
6 30
NC NC
7 29
NC NC
0402/22R/5% 8 28
HSDA1/TXD/P3.1 VSY NC
PWR_SW
9 27
P3.2/INT0 P6.7
MENU
10 26
P3.3/INT1 P6.6/CLKO1
KEY _UP
11 25
P3.4/T0 P6.5
KEY _DOWN
12
P3.5/T1
U3
RTD2120L-LF /RoHS
AUTO_ADJ AUTO_ADJ
SOURCE_SELECT SOURCE_SELECT
GND_POWER
DC5V_Detect
MUTE
Y1
2
R106
24MHz/RoHS 0402/4.7K/5%
R47
OPEN/0402/1M/5% MCU_VDD
C20 C21
0402/22p/50V/N 0402/22p/50V/N
GND_POWER
R40 R41 R43
0402/10K/5% 0402/10K/5% 0402/10K/5%
PANEL_ON/OFF
Q3
1
2N7002/RoHS
GND_POWER
DCDC_ON/OF F
Q5
1
2N7002/RoHS
GND_POWER
Serial
0402/22R/5% R35
RTD_SDIO3
0402/22R/5% R37 RTD_SCSB Host
RTD_SCLK RTD_SCSB
0402/22R/5% R36
RTD_SCLK
Interface
WP
GND
COUT
R46
Y OUT
BK1608HM121-T GND
C19
0603/33P/50v /N/RoHS
GND_POWER
MUTE
MCU_VDD
R12
0402/10K/5%
AMP_SHDN
Q1
MUTE 1 2N7002/RoHS
GND_POWER
Detect Power DC 5V
+5V
R115
0402/3K/1%
DC5V_Detect
Reference Voltage 3.3V
R116
0402/4.7K/5%
GND_POWER
GND_POWER