LG KP235 Service Manual page 73

7. CIRCUIT DIAGRAM
1 2
AUDIO AMP
A
C205 1000p
R205 51K
U201
C210 470n
R206 10K C3
SPK_N IN- VDD
C211 470n
R208 10K C2
SPK_P IN+ VO+
B1
B
AMP_SHDN _SHUTDOWN VO-
C1
BYPASS GND
R211
AMP_SHDN
100K C214
220n TPA6205A1ZQVR
LOW AMP INACTIVE
HIGH AMP ACTIVE
R213 51K
C217 1000p
BATTERY CONNECTOR
C
VBAT
CN201
1
2
BATT_TEMP
3
C225
1u
2V5_VMIC
D
MAIN MIC R221
1K
R226 C227
2.2K 10u
R227
VINNORP
100ohm
C230 C231
39p
39p
C232
R228
VINNORN
0.1u
100ohm
E R229 VA202
C233 C234
2.2K
39p 39p
1 2
LGE Internal Use Only
3 4 5
HEADSET MIC
VBAT
AUXIN
C203 C204
2.2u 1u
AUXIP
A3
B3
SPK_RCV_P
A1
SPK_RCV_N
B2
HEADSET_SPK_OUT_P
(UART_TxD) USC_2
(UART_RxD) USC_1
UART
(18pin 16, 17)
DEBUG_TX/RX
UART PORT
(18pin 6, 7)
C229
39p
MIC200
2
SUMY0003802|mic_ob4_15l42_c33_bottomview
1
OB4-15L42-C33L
VA203
3 4 5
6 7
2V8_VEXT
2V5_VMIC
R201
R202
2K
NA
C200 0.1u
C202 C201
R203
10u NA
1.8K
R204
C206 0.1u
HOOK_DET
0
C207
C209
NA
39p
VBAT
2V8_VEXT
R230
R210 R212
NA
100K 100K
C216 22u
GENIE_TX
C218
GENIE_RX
2V8_VEXT
39p
JACK_DETECT
R214
RPWRON
47
R231
R215
100K NA DSR_DET
R216 47
R217 47
PIF-UNION
USAGE
JIG PORT
S/W Download
MON PORT
/ Calibration
S/W DEBUG???
CHG_DET
CHG_EN
- 84 -
8 9 10
VCHARGE VCHG_ABB
R200
100ohm
ZD200
EDZTE615_1B
INSTPAR
U200
1 10
IN1 _EN
2 9
GND NC2
3 8
_FLAG NC1
4 7
IN2 OUT2
5 6
IN3 OUT1
11 12
CN200 GND_PAD IN_PAD
NCP347MTAHTBG
C212 C213
10u 56p
21
19
FB302 1
2
3
4
FB303
5
6
7
8
9
10
11
12
13
14
15
16
17
18
20
22
(Reverse Type)
C221
1u
(25V, 1608)
CHARGING IC
2V8_VEXT
VCHARGE VBAT
U202
R218 R219
1 8
NA 100K VIN BAT
2 7
_PPR
IREF
3 6
_CHG
IMIN
4 _EN 5
GND
9
PGND
C228 R225 R223
R224
ISL6294
NA 1u 240K 30K
EUSY0292601 (1%) (1%)
ECZH0001215
(10V,K,X5R)
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C226
1u
ECZH0001215
(10V,K,X5R)