LG KP105 Service Manual page 90

7. CIRCUIT DIAGRAM
1 2
2V0_VRTC
SW301
A
END_KEY
END
SW302
1
KEY_OUT1
SW307
4
KEY_OUT2
SW312
7
KEY_OUT3
SW317
*
KEY_OUT4
KEY_IN0
KEY_IN1
KEY_IN2
KEY_IN3
KEY_IN4
KEY BACKLIGHT
VBAT
D
R308 R309
C322
10
1u
R314 1K
KEY_BACKLIGHT
E
1 2
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3 4 5
KEY MATRIX
SW303 SW304 SW305 SW306
2 3
LEFT MENU
SW308 SW309 SW310 SW311
5 6
UP
SEL
SW313 SW314 SW315 SW316
8 9
RIGHT SEND
SW318 SW319 SW320
0 #
DOWN
R310 R311 R312 R313
C323
91 91 15 39 56
1u
Q301
KTC4075E
R315
10K
3 4 5
6 7
VMIC
R301
1.5K
R302 2.2K
C301 0.1u
HS_MIC_N
C302 C303
NA 10u
C304 0.1u
HS_MIC_P
C307
2V8_VIO 2V8_VIO
39p 2V8_VIO
FOR RADIO
R303 R305
R304
FB301
NA 100K 100K
FB302
C308 10u
AUXOP_FML
FB303
C309 10u
AUXOP_FMR
FB306
TXD
FB307
RXD
FB304
HS_DET
2V8_VIO C310 C311
39p 39p
RPWRON
R306
100K
DSR
FB309
C315 C316
4.7u 18p
(1608)
VBAT
CN302
FB305 1800 3
BATT_TEMP 2
1
C324 C318 C319 C320 C321
39p 10p 39p 3p 18p
- 91 -
9 10
EAR_MIC
I/O CONNECTOR
VCHARGE
FM_ANT
C305
R316
VBAT L301
CN301 DNI
10p
270nH
1608 FOR RADIO
21
19 FOR RADIO
1
1800
2
2 : AUDIO
3
1800
4 4 : EAR_L
1800
5 5 : EAR_R
6
6 : TXD
7
7 : RXD
8
8 : JACK_D
9
10 9,10 : BATT
11
11 : R/ON
FB308 12
13 12,13 : CHG
14
(25V, X5R, 1608)
15
C313 C314
16
C317 1u 56p 17
39p 18
20
22
GU041-18P-E1000
LGE Internal Use Only
A
B
C
D