LG CG225 Service Manual page 84

4.17.1 Checking Regulator Circuit (Tx pass continued)
Check P in 5
Yes
2.85V ?
No
Yes
Pin 3 H igh ?
No
Check U1 02
PIN3
Regulat or circuit is OK .
See next page to check
VCTCXO circuit
Repl ace U503
PIN5
- 83 -
4. TROUBLE SHOOTING
VBAT
U503
1
VDD
2
GND
3
RF_EN CE
R1114N281D-TR-F
C560 C532
1000p 4.7u
RF2.85V
5
VOUT
4
NC
C533 C534 C535
NA 10u 1u
PIN5
PIN3