LG FM300 Service Manual page 22

3.2.4 LTE Modem 19.2 MHz Clock (Crystal, X200)
For the generation of the reference frequency an external TCVCXO module is used.
The temperature Compensation helps to minimize the initial synchronization time within a UMTS network.
The module has no Dedicated enable pin as its supply line is routed through SMARTi UE and open if not needed.
R200 100
AFC_OUT
C203
33n
LGE Internal Use Only
2V8_TCXO
X200
TG-5025CG-19_2M
1 4
VC VCC
5 6
TP1 TP2
2 3
GND OUT
19.2MHz
C204
100n
Figure 3.11 TCXO Circuit Diagram
3. TECHNICAL BRIEF
R203
VCC
5
10n
C201
2
3
GND
NL17SZ04XV5T2G
10n
C205
TCXO_IN
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3. TECHNICAL BRIEF
2V8_TCXO
200K
100n
C200
R202 33
4
REF_CLK_OUT
U200
Only for training and service purposes