LG G5300 Service Manual page 54

4-2-2 Checking VCTCXO Circuit
2V7_VTCXO
R424
AFC
15K
Graph 4-1. VCTCXO 13MHz
X401. 4
C454
2.2u
X401
2012
13MHz
GND VCC
C457
2 4
1000p
CTL OUT
1 3
- 53 -
4. TROUBLE SHOOTING
X401. 3
U403
SN74AHC1GU04DCKR
5
C455
2 VCC
IN
GND
1000p
3
R426 1M
Graph 4-2. VCTCXO 2.7V
R425
4
13MHZ
OUT
100