LG -T300 Service Manual page 125

7. CIRCUIT DIAGRAM
16 15 14
L
MICROPHONE
K
C224 33n
R206
MIC_P
C209
DNI
C219 33n
R207
MIC_N
J
I
VRTC PWR/HOLD
H
CN202
1
2
END_KEY
3
C248
ZD206
0.1u
KP_OUT1
VOLUME KP_OUT2
G
KP_OUT3
KP_IN3
CN203
1
KP_OUT1
R237 680 2
KP_IN2
R215 680 3
KP_OUT2
R238 680
ZD212 ZD207 ZD213
F
AUDIO AMP SUB SYSTEM & SIGNAL DISTRIBUTOR
E
D
C240 1u
C2
EPN C239 1u IN1-
C1
EPP IN1+
C231 1u
D2
HSR IN2-
C230 1u
D1
HSL IN2+
C229 1u
D3
IN3-
C228 1u
C3
IN3+
C
I2C_SCL
I2C_SDA
B
A
16 15 14
LGE Internal Use Only
13 12 11 10
VMIC
R217
1K
SPK
R202
C202 C212
2.2K
39p 10u
100
C214 2
RCV_SPK_P
1
39p
100 MIC201
C208 C213 R232
2.2K RCV_SPK_N
39p 39p
VA203 VA204
KEYPAD INTERFACE
SEND OK END
KB203 KB202 KB201
R239 680
R240 680
SIM_DATA
R241 680
R205 680
ZD208 ZD209 ZD210 ZD211
ZD200ZD201 is DNI defaultly
u-SD CARD
VBAT
FB208
120
C245 C244
2.2u 0.1u
C5
OUT+ RCV_SPK_P
D5
RCV_SPK_N
OUT-
FB2041800
U203 A2
HPL
HP_LOUT
A1
HPR
HP_ROUT
FB2051800
C236 C235
0.1u 0.1u
B5 C232 2.2u
CPVDD C237 C238
A3 C233 2.2u
CPVSS R225 R224 47p 47p
A4
20 20
CP
A5 C234 2.2u
CN
1V8_VDD
C242
2.2u
R233
220
C243
C241
0.1u
2.2u
R223
EAR_GND
0
13 12 11 10
9 8 7 6
MUIC
47pF
C203
FB206 120
CN201
1
C215
100pF 2
FB207 120
C204
VA202 VA201
47pF
SIM_CONNECTOR
2V85_VSIM
2V85_VSIM
R210
J202
4.7K
4 1
C5 C1
5 2
C6 C2 SIM_RST
6 3
C7 C3 SIM_CLK
10 7
GND4 GND1
9 8
C222 GND3 GND2
C216
ZD202 ZD203 ZD201
22p 0.1u
C217 C218
DNI 22p
These are added for CMCC ESD test
VMMC
R203 R213 R216 R220 R221 R222
S201
47K 47K 47K 47K 47K 47K
uSD_D1 DAT1_2
DUMMY1
uSD_D0
DAT0
VSS
R201
uSD_CLK
CLK
30
VDD
uSD_CMD CMD
uSD_D3 CD_DAT3
DUMMY2
uSD_D2
DAT2
uSD_DET DETECT_A
1V8_VDD
DETECT_B
DUMMY3
C226 C249
DNI 2.2u
R231 100K
C250
1n
BATTERY CONNECTOR
VBAT 1V8_VDD
CN204
R208
(1%)
51K
1
4 2 R214 10 (1%)
BAT_TEMP
3
R211
C220 C210 C211 C251 (1%)
100K
(5%)
100u 0.1u 39p
27p
need to replace to 1%
9 8 7 6
- 126 -
5 4 3 2
1V8_VDD
VBAT
VBUS_USB
C223
C247
0.1u
0.1u
(10V)
R227 R226 (25V)
2.2K DNI
D2 D5
BAT VB
R219 1 A4 C5 MUIC_DM
USB_DM
DN1 COMN1
R218 1 A5 B5
USB_DP MUIC_DP
DP2 COMP2
R229 1 B3 U202 B4 FB201 1000
UART_RX U1 UID MUIC_ID
R230 1 A3
UART_TX U2
B1 R228 2.2K
RES
A1
MIC C225
D4 D1 C227 2.2u
AUD1 CAP 1.5n
D3
AUD2 C246 2.2u
C4
GND
A2 C3
ISET IC
TP201
I2C_SCL
I2C_SDA
MUIC_INT
5PIN CONNECTOR
VBUS_USB
CN205
6
8
10
12
14
( USB & TA &UART )
1
MUIC_DM 2
MUIC_DP 3
MUIC_ID 4
5
7
ZD205 ZD204 9
11
13
15
SC201
1 2
CHARGING IC
VBUS_USB
VBAT 1V8_VDD
11
PGND
R212
1 10
VIN BATT 100K
2 9
ISET U201 PGB
3 8
nEOC
GND1 CHGSB
4 7
LDO_OUT
LDO GND2
5 6
CHG_EN
IEOC EN_SET
C206
R209 C201
R204
C207 1.2K 3.9K C205
1u 0.1u
1u
0.1u (10V)
(25V)
5 4 3 2
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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