LG L601i Service Manual page 83

4. TROUBLE SHOOTING
4.6.1 Checking VCO Block
TP6
TP5
TP6
TP5
R114
27
R115
15
R123
51
TP1
Test Point (TXVCO Level)
TP1
TP4
MQW5V0C869M U103
10 3
VC VB
1 9
OUT_GSM SW1
5 11
OUT_DCSPCS SW2
8 2
GND5 GND1
12 4
GND6 GND2
13 6
GND7 GND3
14 7
GND8 GND4
Schematic of RF TXVCO
- 84 -
TP3
TP2
FB100
R116 100ohm
R117 100ohm
TP4
TP3
TP2
VREG_RFTX_2.85V
GSM_TX_VCO_0_EN_N
GSM_TX_VCO_1_EN_N
VREG_MSMP_2.7V
VREG_RFTX_2.85V
C