Checking Vco Block - LG L602i Service Manual

4. TROUBLE SHOOTING

4.6.1. Checking VCO Block

TP3
TP1
TP2
TP6
TP5
VREG_RFTX_2.85V
R1016
24
R1017
15
R1021 R1022
R1024
R1023
150 220
270
200
R1025
51
TP4
Test Point (TXVCO Level)
TP4
FB1000
U1002
MQW6V0C869M
5
OUT1
1
OUT2
3
VB
C1047 C1048 C1049
10u 33p
0.1u
Schematic of RF TXVCO
- 88 -
TP1
TP2
TP3
9
VC
R1018 100
10
SW1
R1019 100
8
SW2
C1050 C1051
15p 15p
TP5
TP6
GSM_TX_VCO_1_EN_N
GSM_TX_VCO_0_EN_N