LG -T300 Service Manual page 80

CIRCUIT
1V8_VDD
R335
100K
CAM_IO_1V8
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
B TO B INTERFACE
15pF
LCD_VSYNC
INOUT_A4
4
LCD_nWR
INOUT_A3
3
LCD_CD
INOUT_A2
2
LCD_nCS
INOUT_A1
1
FL303
15pF
LCD_DATA07
INOUT_A4
4
LCD_DATA06
INOUT_A3
3
LCD_DATA05
INOUT_A2
2
LCD_DATA04
INOUT_A1
1
FL302
LCD_IF
15pF
LCD_DATA03
INOUT_A4
4
LCD_DATA02
INOUT_A3
3
LCD_DATA01
INOUT_A2
2
LCD_DATA00
INOUT_A1
1
FL301
LCD_ID
TP6
LCD_nRESET
TP06
CAM_D_1V5
CAM_A_2V8
FM_LNA_EN
VBAT
C318 C321 C322
C320 C319
1u 2.2u 2.2u
2.2u 2.2u
4. TROUBLE SHOOTING
LED_PWM
LCD_IF
INOUT_B4
6
TP304
INOUT_B3
7
TP303
INOUT_B2
8
TP302
INOUT_B1
9
INOUT_B4
6
INOUT_B3
7
INOUT_B2
8
INOUT_B1
9
INOUT_B4
6
INOUT_B3
7
INOUT_B2
MLED5
8
TP301
INOUT_B1
MLED4
9
VBAT
MLED3
MLED2
MLED1
R323
100
VA306
C309
C338
2.2u
0.1u
ZD301
CHARGE PUMP
C323 1u
C324
1u
6 24
AGND VOUT
7 23
VIN LED1
U302
8 22
LDOIN LED2
9 21
LDO4 LED3
10 20
LDO3 LED4
11 19
LDO2 LED5
12 18
LDO1 LED6
C317
1u
I2C_SCL
I2C_SDA
LCD_BL_CTRL
TP7
TP07
LED_PWM
C316
R313
0.1u
100K
- 81 -
4. TROUBLE SHOOTING
1V8_VDD VMMC
TP305
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
TP5
8
TP4
7
TP
6
TP2
5
TP1
4
3
TP
2
1
CN303
C308 C307
1u
1u
MLED1
MLED2
MLED3
MLED4
MLED5
LGE Internal Use Only