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LG LG-P715 - Checking TCXO Block

LG LG-P715
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4. TROUBLE SHOOTING
- 53 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.3 Checking TCXO Block
The output frequency (19.2MHz) of TCXO (X2001) is used as the reference one of RTR6285 and PM8029 internal VCO.
Schematic of the Crystal Part (19.2MHz)
TP1
TP2
TP3
R2007
100
C2028 1n
19.2MHz
1XXA19200FBB
X2001
3
2
4
1
VCONT
VCC
GND
OUT
VREG_TCXO_2.85V
C2026 330p
1n
C2023
0.1u
C2024
27pC2027
C2025
10n
TCXO_RTR_19.2MHZ
TCXO_NFC_19.2MHz
TCXO_PM_19.2MHZ
TRK_LO_ADJ
R2007 : Change 1Kohm --> 100ohm(refer to QCT reference schematic)
change 0819
Clesed to TCXO
CHANGE 11.03.02
GPS DFF was removed.
CHANGE 1008
TP1
TP2
TP3

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