LG F1200 Service Manual page 79
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Also See for F1200:
- User manual (288 pages) ,
- Circuit diagrams (7 pages) ,
- User manual (95 pages)
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4. TROUBLE SHOOTING
(4) Checking Tx IQ signals
Checking Points
Checking Flow
Check C137, C138
Refer to Waveform
Check if there is any
Major Difference
Rx IQ Circuit Diagram
CAM_CLK
RXQP
RXQN
RXIP
RXIN
R115
TXQP
820
C134
330p
R116
TXQN
820
R119
TXIP
820
C135
330p
R117
TXIN
820
C137
Similar ?
Tx IQ is OK
C137
330p
C138
330p
C138
U102
Replace U102
No
Yes
0
- 78 -
C563
C118
100p
NA
100p
C119
RF2.85V
C128
32
10p
VDD3
30
VDD2
1
BQP
2
BQN
3
BIP
4
BIN
5
XTAL1
6
XTAL2
7
XAFC
U102
SI4206
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Table of Contents
Troubleshooting
