4. TROUBLE SHOOTING
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Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
R2006
220
X2000
X1G003581002700
19.2MHZ
3
2
6
5
4
1
VC
VCC
TP1
TP2
GND
OUT
R2010
100K
U2000
3
2
4
1
5
VCC
GND
C2007
0.1u
100p
C2018
VREG_MSMA_2.6V
VREG_TCXO_2.85V
1n
C2006
C2000
1n
C2001
0.1u
100p
C2004
R2002
100
R2009
33
C2005
10n
TCXO_EN
TCXO_RTR_19.2MHZ
TCXO_PM_19.2MHZ
USBH_SYSCLK
RTR_TRK_LO_ADJ
0603
0603
Rev.C Changed 2011.4.26
Clesed to TCXO
TCXO Circuit
0.8T
0603
TP1
TP2
TP3
͑
ͽͶ͑ ͺΟΥΖΣΟΒΝ͑ ΆΤΖ͑ ΟΝΪ͑
͑
G
4.3 Checking TCXO Block
The output frequency (19.2MHz) of TCXO (X200) is used as the reference one of RTR6285 and
PM7540 internalVCO.
Schematic of the Crystal Part(19.2MHz)
G
G
TP1
TP2
TP3