Checking Tcxo Block - LG P705 Service Manual

4.3 Checking TCXO Block

4.3 Checking TCXO Block
The output frequency (19.2MHz) of TCXO (X2001) is used as the reference one of RTR6285 and PM7540 internal
The output frequency (19.2MHz) of TCXO (X2001) is used as the reference one of RTR6285 and PM7540 internal VCO.
VCO.
LGE Internal Use Only
Clesed to TCXO
R203
TRK_LO_ADJ
100
C222
10n
TP2
TP3
X200
KT2520F19200DCW28RAK
1 6
VCONTROL VCC
2 5
NC1 NC2
3 4
GND OUT
19.2MHZ
TP3
Schematic of the Crystal Part (19.2MHz)
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4. TROUBLE SHOOTING
TP2
TP1
VREG_TCXO_2.85V
C215
C214
1n
0.1u
TP1
C223 27p
TCXO_PM_19.2MHZ
C224 1n
TCXO_RTR_19.2MHZ
Only for training and service purposes