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Manuals
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KT878
Service manual
Vrf_Abb - LG KT878 Service Manual
Microsoft windows mobile 6.1 professional
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Advertisement
检查流程
2. 检查 VCTCXO 电路
测试点
电路图
R120
ABB2RF_AFC
VEXT_RF
C124
0.1u
C125
1000p
31
VSUP_BBQ
32
RX1900B
33
RX1900
34
RX1800B
35
RX1800
36
U104
RX900B
37
AD6546
RX900
VSUP_AM
38
RX850B
39
RX850
X101
0
1
VCONT
2
GND
C147
0.1u
KT3225K26000ECW29ZA0
26MHz
- 90 -
VBAT_RF
VRF_ABB
C132
0.22u
20
VAFC
19
VLDO2
18
VLDO1
17
VBAT2
16
NC1
15
TX_FB
14
13
NC2
12
APC
VRF_ABB
3
OUT
4
VCC
C149
C150
100p
0.1u
4.故障解决
VCTCXO_26M
C151
18p
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Chapters
Service Manual Kt878
2
检查流程
90
Table of Contents
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