Keypad Switches And Key Backlight Illumination - LG KG195 Service Manual

6.3 Circuit Diagrams

Keypad Switches and Key Backlight Illumination

P.5 KP_BL-
P.5 PWRKEY
P.4 KCOL3
P.4 KCOL2
P.4 KCOL1
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
KCOL3
KCOL2
KCOL1
KCOL0
KROW0
HSP110 S102
1 2
KROW1
S106 S107
HSP109
1 2 1 2
KROW2
S110 S111
HSP108
1 2 1 2
6
KROW3
S114 S115
HSP107
1 2 1 2
KROW4
S118 S119
HSP105
1 2 1 2
KROW5
HSP106 HSP101 HSP102
S122
PWRKEY
2 1
ON/OFF
POWER KEY
VBAT
VDD
V603 C601
C605 ESDA 100nF_10%
100nF_10% 0402R-S 0402C-S J601
0402C-S AXK720147G
AXK720147G
20
GND1
19
VBAT1
18
VBAT2
17
VDD
16
BL_EN
15
PWRKEY
14
KCOL3
13
KCOL2
7 8 12
KCOL1
5 6 11
KCOL0
3 4
1 2
V607
ICVE21054E250R101
ICVE21054E250R101
S101
1 2
S105
1 2
HSP104
S108 S109
1 2 1 2
L103 L104
S112 S113
82nH 82nH
1 2 1 2
9
C106
33pF
L102
S116 S117
82nH
1 2 1 2
L105
8 82nH 0
C107
L101
33pF
S120 S121
82nH
1 2 1 2
L106
7 82nH *
C104
33pF
HSP103
KEY PA D
V612
R610 DNI
DNI 0402R-S
1
GND3
0402R-S
2
RXD2
3
TXD2
R611
4
KROW5
DNI
5
KROW4
0402R-S
6
KROW3
7 8
CAP_ON
8 6
KROW2
9 4
KROW1
10 2
KROW0
V608
ICVE21054E250R101
ICVE21054E250R101
2
4
6
8
- 95 -
6. Repairing
C105
33pF
C102
33pF
C101
33pF
V613
DNI
0402R-S
URXD2 P.4
UTXD2 P.4
7
GPIO5_CAP P.4
5
KROW2 P.4
3
KROW1 P.4
1
KROW0 P.4
1
KROW3 P.4
3
KROW4 P.4
5
KROW5 P.4
7
KCOL0 P.4
V609
ICVE21054E250R101
ICVE21054E250R101
LGE Internal Use Only