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LGE Internal Use Only
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
LG Electronics
86/115
LGE Property
4.12.1 Checking DCXO Circuit
Replace
X601
No
Yes
DCXO Circuit is OK.
See next page to check
PLL Circuit.
TP1(C616) : 26MHz
Checking Points
Figur2. DCXO
DCXO Circuit Diagram
Figure 3. DCXO Cicuit
Waveform
Figure 4. DCXO Waveform
Is the waveform
of TP1(C616) similar to Fig.4?
TP1 (C616)
TP1
Checking Flow
X601
26MHZ
TSX-3225
2
1
3
4
GND2
HOT2
HOT1
GND1
18
17
16
15
14
13
2
1
1
1
0
1
3
S
Y
SF
2
S
Y
SF OX
X
O
X
GND1
FSYS1
VDDXO2V8
EN
VDDVCO2V8
VCO_RC
0.001uF
C616
0.047uF
C617
R612
820
RF_EN
26MHZ_MCLK
TP1
Содержание GT350
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