LG KF690 Service Manual page 131

7. CIRCUIT DIAGRAM
1 1 2 2 3 3
A A
KEY PCB
B B
VREG_MSMP_2.7V PM_ON_SW_N
C100
0.1u
100 101
KEY_ROW(0)
C C
100ohm R107
1 2 3
103 104
KEY_ROW(1)
100ohm R108
4 5 6
106 107
KEY_ROW(2)
100ohm R106
7 8 9
HOT100 109 HOT101
100ohm R105
KEY_ROW(3)
KEY_COL(0) HOT4 0 HOT3
KEY_COL(1)
KEY_COL(2)
KEY_COL(3)
KEY_COL(4)
D D
KEY MAP
E E
+VPWR
VREG_MSMP_2.7V
CN100
G1
1 20
2 19
FOLDER_DETECT_N
3 18
KEY_ROW(3) KEY_COL(0)
F F
4 17
KEY_ROW(2) KEY_COL(1)
5 16
KEY_ROW(1) KEY_COL(2)
6 15
KEY_ROW(0) KEY_COL(3)
7 14
KEY_COL(4) KYPD_LED_EN
8 13
MIC1P PM_ON_SW_N
9 12
MIC1N UART_RX
10 11
MICBIAS UART_TX
G2
KEY PCB TO MAIN PCB
G G
H H
1 1 2 2 3 3
LGE Internal Use Only
4 4 5 5 6 6
END
+VPWR
PRSB6.8C
KYPD_LED_EN
102 SND
105 CLR
108 COM
KEY BACK LIGHT LED (SIDE VIEW)
CAMERA
CAMERA
FOCUS
SPM0204LE5-QB
G4
6
PWR
5
G3
4
G2
3
G1
2
OUT
1
MIC100
MIC
U100
A3212EELLT-T
VREG_MSMP_2.7V
VDD
G1
FOLDER_DETECT_N OUT G2
C109
0.1u
FOLDER DETECT
4 4 5 5 6 6
7 7 8 8 9 9
LD100
SW100
20279-001E-01
LD101
G1
G2 ANT
MICBIAS
C103 C104
10u 47p
C105 0.1u
MIC1N
C106 0.1u
MIC1P
PM_ON_SW_N TP100
UART_RX TP101
UART_TX TP102
TP PAD
7 7 8 8 9 9
- 132 -
10 10 11 11 12 12
ANT100 ANT101
R102
3.3nH
33nH R104
C102
L1 1.2nH
0.5p
10 10 11 11 12 12
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C C
D D
E E
F F
G G
H H