LG MG180C Service Manual page 78

4.15.2 Checking VCTCXO Circuit (Tx pass continued)
AFC
PIN2
PIN3
Check P in 3 of X 500
Yes
26MHz ?
No
Yes
Pin 4: 2. 85V ?
No
Check U5 02
X500 26MHz
R515
1
VCONT OUT
12K
2
GND VCC
C532
1000p
PIN1
PIN4
- 77 -
4. TROUBLE SHOOTING
VCTCXO circuit is OK
See next page to check
FEM & Mobile SW
Repl ace X500
RF2.85V
3
C530
4
1000p
C531
1uF
TCXO_OUT