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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
4.13.2 Checking BT IC Block
Main Board (Top side)
TP06
TP06
TP1 ~TP4 :
OK?
Check frequency
at
BT CLK (R140)
with
Oscilloscope
Check Next Stage
No
No
Yes
Check VCXO(X101) block
26MHz ?
Check PMIC Block
Check Power level
a
t BT IC Output (C716)
with
Spectrum Analyzer
Range
-2 ~ 2dBm ?
No
Yes
Change BT Chip (U706)
Yes
TP06
TP06
Rev. 1.0
Rev. 1.1
VDDE_1V8
smd_0603h_25_r_na
DNI
R135
33
R140
smd_0603h_25_r
10
R139
100K
R141
2.2u
C151
2 A
GND
3
VCC
5
4
Y
_OE
1
U109
SN74LVC1G125DRLR
100K
R130
VDDK_2V75
C150
0.1u
BT_CLKREQ_n
BT_CLK
MCLKSEC
TP06
Содержание TU750
Страница 1: ...Service Manual Model TU750 Internal Use Only Service Manual TU750 Date January 2009 Issue 1 0 ...
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