Only For Training And Service Purposes - LG GU280 Service Manual

4. TROUBLE SHOOTING
Checking Point
1. TP1 : VREG_MSMP_2.6V
2. TP2 : VREG_MSME_1.8V
3. TP3 : D2D_SLEEP_CLK
4. TP4 : BT_CLK
5. TP5 : BT_ANT_OUT
VREG_MSME_1.8V
TP2
VREG_MSMP_2.6V
TP1
ANTENNA_PAD
ANT104 ANT103
ANTENNA_PAD
LGE Internal Use Only
TP3
TP4
BTS4025
C5
VDD_IO
A5
C171
VDD_DIG
1u
C1
VDD_ANA
F3
VDD_PA
C167
L126
10p
1n
F1
RF_BIAS
E1
RF_TXRX
2450MHz
TP5
C170 100p
L128 L127
DNI DNI
TP2
C172
1u
C166 C165
1u 10p
B4
SYSRST_B
F4
PCM_IN
E5
PCM_OUT
B5
PCM_SYNC
D5
PCM_CLK
E4
U103
AUX_TXD
C4
BTS4025
HCI_5
E6
HCI_4
D6
HCI_3
F5
HCI_2
C6
HCI_1
F6
HCI_0
C3
MFP_4
D4
MFP_3
D3
CLKREQ_OUT
TP
D2D_SLEEP_CLK
TP101
TP3
X102 DSX321G-32M
4 3
1 2
32MHz
18p 18p
C169 C168
- 56 - Copyright © 2009 LG Electronics. Inc. All right reserved.
TP1
TP5
C164
10p
R112
470K
BT_PWR_ON
BT_PCM_DOUT
BT_PCM_DIN
BT_PCM_SYNC
BT_PCM_CLK
UART1_CTS_N
UART1_RFR_N
UART1_RX_DATA
UART1_TX_DATA
TP4

Only for training and service purposes