LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 84 -
Che
Check
k TP
TP 1
1
VCC o
VCC o f VCXO
CXO
VCC
VCC ≥ 2.8V
2.8V
Che
Check
k TP
TP 2
2
TRK_LO_AD
TRK_LO_AD J
3V
3V≥ Volta
olta ge≥0V
0V
Che
Check
k TP
TP 3,
3, TP4
TP4
With
th Oscil
scil loscope
loscope
19.2
19.2 MHz
Hz Si
Signal
nal
VCXO
VCXO is OK
s OK
Check
Check ot
ot her part
her part
Che
Check
k PM
PMIC
Che
Check MSM
k MSM
Check
Check soldering
soldering
an
and c
d c omponents
ents
Ye
Yes
Ye
Yes
Ye
Yes
No
No
No
No
No
No
Check TP 1
VCC o f VCXO
VCC ≥ 2.8V
Check TP 2
TRK_LO_AD J
3V≥ Volta e≥0V
Check TP 3, TP4
With Oscil loscope
19.2 MHz Si nal
VCXO is OK
Check ot her part
Check PMIC
Check MSM
Check soldering
and c omponents
Yes
Yes
Yes
No
No
No
TCXO output waveform(19.2MHz)
Содержание KE990 - Viewty Cell Phone 100 MB
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