ViewSonic VX2235wm-3 Service Manual page 44

8.4. MCU
2 PC5V
2 DVI5V
3.3V
1,3,5 3.3DVCC
3 RESET_MCU
VCC_MCU
HDCP EEPROM
8
7
R190 NC/100
6
R191 NC/100
5
HDCP_SCL
HDCP_SDA
HDCP EEPROM
ADD NET
HDCP_SCL
HDCP_SDA
ADD
R190 , R191, C155 , I107
P105
1
2
3
4
5
6
7
8
9
10
C153 C146 C147
100nF 100nF 100nF
DGND
ViewSonic Corporation
D1241N4148 D1251N4148 Q107
A K A K E C
2N3906
+ C142
D1261N4148
A K
10uF/16V
R181
3.3DVCC
4.7K
R182 D127
Q108
1N4148
E C
4.7K
2N3906 RESET
R183 R184
4.7K
D128
4.7K
DGND
1N4148
DGND
C155
I107
NC/100nF
1 MUTE
VCC A0
2
WP A1
3 1 adj_BACKLIGHT
SCL A2
5 VOLUME
4
SDA GND 1 on_BACKLIGHT
GREEN
ORANGE
NC/AT24C04N-10SC R160
2,3 SCL_D2
R161
2,3 SDA_D2
UP
DGND
5 MUTE_S
DOWN
POWER
R163
2,3 SDA_D1
R164
2,3 SCL_D1
MUTE pin change to mcu p5.0
MUTE_S pin change to mcu p3.3
hunk 06'0706
hunk 06'0704
R187 100 MUTE
100 SELECT
R172
R173 100 DOWN
R174 100 UP
R175 100 MENU
LED_GREEN
R176 100
LED_ORANG
R177 100
R178 100 POWER
48
C148 C149 C150 C151 C152
1
100nF 100nF 100nF 100nF 100nF
P5單向 P1雙向
MTV512M-LQFP48
P3 P6單向
X1,X2
雙向
12
13
Confidential - Do Not Copy
41
+5V
VCC_MCU
add R189 res pull high 0630
C140 C141
100nF
100uF_16V
DGND DGND
RP03 RP04
R155 R156 R158
R157
R159 R189 RESET
2.2K 2.2K 10K
10K
10K 10K
10K_RP 10K_RP
44
P5.0/DA0
45
P5.1/DA1
46
P5.2/DA2
47
P5.3/DA3
48
P5.4/DA4
1
P5.5/DA5
22
2
HSCL2/P5.6
22 3
HSDA2/P5.7
9
P3.2/INT0
10
P3.3/INT1
11
P3.4/T0
12
P3.5/T1
13
P7.6/CLKO
14
P7.7
22 TX
8
HDA1/TX/P3.1
22 RX
5
HCL1/RX/P3.0
I106
R165 R166
MTV512/RTD2120
2.2K 2.2K
X101
1
24MHz
VCC_MCU
R168 6.8K
+5V
C144
10pF
R170
820
Q105 GREEN
B
2N3906 R171 10K
LED_GREEN
r170.r179~modify value 330R for 5mA 0627
+5V
R179
820
37
36
Q106 ORANGE
B
2N3906
R180 10K
C
3
LED_ORANG
1 2
B
E
25
24
VX2235wm-3
RP01 RP02
10K_RP 10K_RP
IICSDA R153
IICSCL
R154
RTD_SD0 3
RTD_SD1 3
RTD_SD2 3
RTD_SD3/SDI 3
RTD_SCSB 3
RTD_SCLK 3
R192 R193
RP05
10K
10K
29 10K_RP
NC
28
VS 2
VSYNC add net"DVI_DET"
MCU
27
P6.7
26
P6.6/CLK0
25
P6.5
24
P6.4
23
P6.3/AD3
22
P6.2/AD2
SELECT
21
P6.1/AD1 MENU 3.3DVCC
20
P6.0/AD0
R167
1K
2
R169
10K
C145
10pF
DGND
DGND 1,2,3,5
DGND
I105 C143
8 7
VCC WP
100 100nF
5 3
SDA A2
6 2
SCL A1
100
4 1
GND A0
*24LC16
DGND
0616
Closed to MCU
VDD_CTRL 1
R162 0
XO_24M 3
DVI_DET 2
VGA_DET0 2
DVI_HDCP 2
MCU pindefine change
P6.1 change to P6.2
P3.4 change to P6.0
P3.5 change to P6.1
ADD pull high
R192 , R193
hunk 06'0704