Pcb Layout - LG GM750 Service Manual

9. PCB LAYOUT

BAT501 Backup Battery.RTC reset.
CN601 B to B conn.Can not power
on.Don't operate vibrator, volume key,
optical joystick, 3 sensor, speaker, Touch
Window.
Don't detect USIM.
Can't operate Camera. No LCD display.
FL601/FL602/FL603 Filter.Can not
operate VGA Camera.
S601 Micro-SD Socket Can not use a
micro-SD
IC501 Audio ICNo Sound
U504 Motion Sensor. Can not rotate the
screen automatically.
U302 Memory Can not boot
U403 PM7540 (PMIC) Can not power on
Can not chargeNo Service
U505 Motor Driver IC. Can not operate
vibrator.
U401 Fuel Gauge IC.Can not check
Battery Level
X201 VC-TCXONo Service
U102 WCDMA PAMWCDMA II TX Power
/ No Service
U101 WCDMA Dual-PAMWCDMA I, VIII
TX PowerNo Service
CN402 Battery Conn. Can not power
onCan not detect battery
CN602 Optical Joystick Conn. Can not
operate Optical Joystick.
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
A N T 1 0 2 A N T 1 0 3
J 6 0 1
U 1 0 4
U 4 0 4
C 5 0 5
D 6 0 1
Q 5 0 1
R 4 2 5
Q 5 0 3
Q 4 0 1
C 4 5 9
6
C 5 2 6
D
U 5 0 4
5 1
D 2 0 2
D 6 0 2
C 3 4 4 D 2 0 1
R 3 0 1
C 3 3 1
R
P
N
M
L
K
U 2 0 1
J
U 3 0 2 H
G
F
E
D
C
B
A
1 0 1
T P 4 0 1
C 4 2 6 X 4 0 1 C 3 3 7
C 3 2 3
L 4 0 2
C 4 6 9
C 1 4 5
C 4 1 8
L 4 0 1
U 5 0 5
C 4 0 7 U 4 0 3
C 4 2 1
L 4 0 4
C 4 2 3
U 4 9 9
U 1 0 5
D 4 0 3
L 4 0 3
C 4 1 9
F L 1 1 3
L 4 0 6
U 4 0 1
F L 1 0 3
X 2 0 1
U 1 0 2 U 1 0 1
F L 1 1 0
C 1 0 4
U 1 0 3
U 1 0 8
U 1 0 6
U 1 0 7
S W 1 0 1
D 4 0 2
C N 4 0 2
Z D 4 0 2 C 4 5 0
C N 6 0 2
A N T 1 0 1 A N T 1 0 5 A N T
- 203 -
J601 USIM Conn. Can not
detect USIM.
A N T 1 0 4
FL111 WCDMA I RX SAW
U104 GPS LNANo GPS Signal
Detection
U404 OVP TR.
C N 4 0 1
CN401 u-USB Conn.Can not
operate USB Don't charge
F
E
D
C
B
A
1
Q401 Battery Charging TR.Can
not Charge
U502 LCD Backlight Charge
PumpNo Display
CN504 LCD Conn.No LCD
Display
U402 USB Trans. Can not
operate USB
U201 MSM7200A
(BB chipset) Can not power on
No LCD Display No Service
U105 RTR6285WCDMA/GSMRX
Sensitivity & TX PowerNo Service
FL113 WCDMA I RX
SAWWCDMA I RX SensitivityNo
Service
FL102, FL105, FL106, FL108
GSM RX SAW GSM RX
SensitivityNo Service
U107 FEM & GSM PAMWCDMA/
GSM RX Sensitivity & TX PowerNo
Service
1 0 6
FL104(I)/FL112(II)/FL110(VIII)
DuplexerWCDMA TX Power & RX
SensitivityNo Service
LGE Internal Use Only