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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
TP14_BB
U503
Main Board (BOTTOM)
TP15_BB
U501
②
③
The output must be 3.1V DATA or Clock signal
TP16_BB
U504
output
④
Main Board (BOTTOM)
Main Board
The output must be 6.1V DC.
The output must be 3.1V DC.
Memory
TOUCH_LDO
U503
CE
6
GND1
2
GND2
5
4
NC
1
VDD
3
VOUT
TP505
R1114D311D
1u
C513
VBAT
C512
1u
VDD_LDO_3V1
ACC_GP_LDO_3V1_EN
TP14_BB
U503
TOUCHSCREEN Level Shifter
REV.F
TP501
C507
smd_0603h_3_r
0.1u
A3
A3
A4
A4
C1
B1
C2
B2
B3
C3
B4
C4
B4
GND
B3
OE
VCCA
B2
B1
VCCB
U501
TXS0104EZXUR
A1
A1
A2
A2
R501
2K
VDD_LDO_3V1
VDDE_1V8
TP503
2.2K
R502
smd_0603h_3_r
C510
0.1u
R503
2.2K
APP_GP_TOUCH_SCREEN_INT
TOUCH_RST
IN_TOUCH_SCREEN_SDA
ACC_GP_LDO_3V1_EN
IN_TOUCH_SCREEN_SCL
TOUCH_SCREEN_INT
APP_GP_PAD_SDA
APP_GP_PAD_SCL
APP_GP_TOUCH_RESET
DCDC FOR EL
EN
4
GND
2
PGND
5
3
VIN
1
VOUT
MIC94071YMT
Q501
VBAT
L501
10uH
4.7u
C514
2.2u
C515
20K
R510
5.1K
R511
ANGD
4
EN
3
6
FB
NC
5
OUT
1
8
PGND
SW
7
9
T_GND
2
VIN
U504
MIC2290YML
VREG_6V1
APP_GP_ELDCDC_EN
TOUCH_LDO
Содержание TU750
Страница 1: ...Service Manual Model TU750 Internal Use Only Service Manual TU750 Date January 2009 Issue 1 0 ...
Страница 216: ... 217 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 218: ... 219 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 221: ... 222 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...