Key Schematic Digram - Sharp LC-32LE40E Service Manual

[3] KEY SCHEMATIC DIAGRAM
VBIAS
C101
0.1uF 25V
AC_shield is a large
cooper which encircles the
Cin button and it's path.
Cap Pads
V O L +
CB104
CIN_02
1
TOUCH PAD 6X12-OVAL
U102
CIN_01 GPIO_07
1 18
CIN1 GPIO7
CIN_02
2 17
CIN2 INT#
CIN_03 SM_SDA
3 16
CIN3 SDA
CIN_04 SM_SCL
4 15
CIN4 SCLK
CIN_07 GPIO_09
5 14
CIN7 GPIO9
CIN_09
6 13
CIN9 DVCC
IT7235BFN-3108/AX (R)
C103
0.1uF 25V
AC_SHIELD
R112
100OHM1/16W
C104
100P 50V
C H - C H +
CB106 CB105
CIN_03 CIN_04
1 1
TOUCH PAD 6X12-OVAL TOUCH PAD 6X12-OVAL
R122
C102 2.94K 1% 1.65K 1%
0.1uF 25V
C H -
GPIO_02
C H +
GPIO_11
V O L -
GPIO_04
V O L +
GPIO_13
R118
1.65K 1%
M E N U
GPIO_09
I N P U T
GPIO_07
P O W E R
GPIO_03
P O W E R M E N U
CB107 CB101
CIN_11 CIN_09
1 1
TOUCH PAD 6X12-OVAL TOUCH PAD 6X12-OVAL
101
0.1uF 25V
3.3V
R124
NC/ 2K2 1/16W 5%
Key 1
R117 R121 R115
820R 1%
330 OHM 1/16W
3.3V
R116
NC/ 2K7 1/16W 5%
Key 2
R119 R120
820R 1%
330 OHM 1/16W
GPIO2,3,4,7,9,11, 13 output data format
is like mechanical switch output form,
i.e., No touch: Open, Touch: GND.
CH - CH +
CIN(+) 3 4
CIN(-)
LED output
GPIO output 2 11
Voltage
1.87 1.4
I N P U T V O L -
CB102 CB103
CIN_07 CIN_01
1 1
TOUCH PAD 6X12-OVAL TOUCH PAD 6X12-OVAL
LC-32LE40E-LC-42LE40E
1 CN0101
SM_SDA
2
SM_SCL
3
OTP
4
KEY 2
5
KEY 1
3.3V 6
7
C105 CONN
VOL- VOL + Menu Input Power
11
1 2 9 7
4 13 9 7 3
0.93 0.47 1.4 0.93 0.47