Service manual
ViewSonic Corporation Confidential - Do Not Copy
80
Model
Title
Date Rev:
ViewSonic Corporation
MCU
P77
P65
RTD_SCLK
P61
P66
RTD_SCSB
P76
P64
MENU_ISPP67
IICSCL
P63
IICSDA
P62
V5A
P32DDC_CI_SEL
VCCVSS
P50
P51
P52
P53
P55
P57
P56
P30
P31
P34
P35
P32
P33
P77
P76
P67
P66
P64
P65
P61
P60
P63
P62
RST
P10
P11
P12
P13
P14
P15
P16
P17
X2
X1
P54
BUS_POWER
P30DDC_CLK_OUT
P13
VCC
P53
P15
X2
P11
P60
P12
P52
P50
P14
RST
X1
P54
P10
P51
IICSDA
P17
IICSCL
P16
P31DDC_DAT_OUT
P56
P57
P55
P34
P35
VSS
BUS_POWER
DDC_CLK_OUT
DDC_DAT_OUT
DDC_CI_SEL
V5A
P33
RTD_SCSB 5
RTD_SCLK 5
RESET_MCU 5
LED_ORG6
CONNECT2
LED_GRN6
MENU 6
INV_ON/OFF6
AUDIO_FUNCTION6
VGA_5V2
BUS_POWER3
KEY_UP 6
KEY_DOWN 6
SOURCE_SELECT 6
AUTO_ADJ 6
PWR_SW 6
YOUT 5
V5A6
RTD_SDIO1 5
RTD_SDIO3 5
RTD_SDIO2 5
RTD_SDIO0 5
MUTE6
DDC2_SCL3
DDC2_SDA3
DDC_DAT2,5
DDC_CLK2,5
DDC_DAT2,5
DDC_CLK2,5
DDC2_SDA3
DDC2_SCL3
PANEL_ON/OFF6
DCDC_ON/OFF6
RESET_RTD5
GND_POWER
MCU_VCC
GND_POWER
GND_POWER
GND_POWER
MCU_VCC
GND_POWER
MCU_VCC
GND_POWER
GND_POWER
DDC_CI_5V
DDC_CI_5V
DDC_CI_5V
DDC_CI_5V
GND_POWER
GND_POWER
GND_POWER
GND_POWER
3.1~3.6V
7
8
5
3
1
2
4
6
RP4RP4
R40R40
R29R29
R31R31
2
Y1Y1
1 2
D15D15
12
D19D19
R20R20
R33R33
R24R24
7
8
5
3
1
2
4
6
RP2RP2
R23R23
1
32
Q2Q2
7
8
5
3
1
2
4
6
RP5RP5
C27C27
R25R25
R36R36
1 2
D18D18
R30R30
C29C29
12
D17D17
R19R19
R26R26
12
D16D16
R39R39
+
C26
+
C26
1
32
Q1Q1
R21R21
R41R41
GND
7
VCC
14
1B
3
2B
6
3B
8
4B
11
1A
2
2A
5
3A
9
4A
12
2OE
4
1OE
1
3OE
10
4OE
13
U1U1
R32R32
C25C25
DA5/P5.5
1
P5.6/HSCL2
2
P5.7/HSDA2
3
RST
4
HSCL1/RXD/P3.0
5
NC
6
NC
7
HSDA1/TXD/P3.1
8
VSS
17
X2
15
VCC
41
P1.0/ET2
40
P1.1
39
P1.2
38
P1.3
37
P1.4
36
P1.5
35
P1.6
34
P1.7
33
NC
19
VSYNC
28
NC
29
P6.0/AD0
20
P6.1/AD1
21
P6.2/AD2
22
P6.3/AD3
23
P6.4
24
P6.5
25
P6.6/CLKO1
26
P6.7
27
X1
16
P3.2/INT0
9
P3.3/INT1
10
P3.4/T0
11
P3.5/T1
12
P7.6/CLKO2
13
P7.7
14
NC
18
NC
30
NC
31
NC
32
NC
43
NC
42
DA0/P5.0
44
DA1/P5.1
45
DA2/P5.2
46
DA3/P5.3
47
DA4/P5.4
48
U4
NC/MTV512/RoHS
U4
NC/MTV512/RoHS
7
8
5
3
1
2
4
6
RP1RP1
1 2
D12D12
A0
1
A1
2
A2
3
GND
4
SDA
5
SCL
6
TEST
7
VCC
8
SEEPROM
U3
SEEPROM
U3
DA0/P5.0
2
DA1/P5.1
3
DA2/P5.2
4
DA3/P5.3
5
DA4/P5.4
6
DA5/P5.5
7
P5.6/HSCL2
8
P5.7/HSDA2
9
RST
10
HSCL1/P3.0/RxD
11
XTAL2
20
XTAL1
21
VSS
22
VCC
44
P1.0/ET2
43
P1.1
42
P1.2
41
P1.3
40
P1.4
39
P1.5
38
P1.6
37
P1.7
36
VSYNC
32
NC
33
P6.0/AD0
24
P6.1/AD1
25
P6.2/AD2
26
P6.3/AD3
27
P6.4
28
P6.5
29
P6.6/CLOK1
30
P6.7
31
HSDA1/P3.1/TXD
13
P3.2/INT0
14
P3.3/INT1
15
P3.4/T0
16
P3.5/T1
17
P7.6/CLKO2
18
P7.7
19
NC
1
NC
23
NC
34
NC
35
NC
12
U2U2
R34R34
R38R38
R27R27
1 2
D14D14
R37R37
R22R22
1
32
Q4Q4
1 2
D13D13
R35R35
C28C28
1
32
Q3Q3
7
8
5
3
1
2
4
6
RP3RP3
VX2245wm-1