Filter
Top Products
- 69 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
]_VXZZ
(1) Checking Crystal Circuit
4. TROUBLE SHOOTING
TEST POINT
CIRCUIT
WAVEFORM
CHECKING FLOW
Figure 4.3.1
26 MHzO.K?
No
Crystal is OK.
See next page to check PLL Circuit
Yes
Replace X102
Figure 4.3.2 Figure 4.3.3
1 pin : 26MHz
X101
1 pin
2V85_VSIM
G4
G2
G3
M8
A11
B11
K12
K11
B2
A3
B3
A2
J8
H7
USIF2_RTS_N
USIF2_CTS_N
USIF1_TXD_MTSR
USIF1_RXD_MRST
USIF1_RTS_N
USIF1_CTS_N
DPLUS
DMINUS
XOX
XO
VSIM
SIM_IO
SIM_CLK
SIM_RST
0.1u
C126
26MHz
DSX321G-26MX102
21
34
SIM_CLK
BT_RXD
BT_TXD
USB_DP
USB_DM
UART_TX
UART_RX
NLB_AD25
NUB
SIM_RST
SIM_DATA
Close to the 26MHz XTAL
EINT2
CC1CC6IO
Connect GND plane directly
TP1