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4. TROUBLE SHOOTING
4.14 Checking VCTCXO Block
The reference frequency (19.2MHz) from X100 (VCXO) is used UMTS TX part, GSM part and BB part.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TCXO
TC7SH04FS
U102
VREG_BT_2.85V
C148
0.01u
1000p
C147
R114
100K
C142
0.01u
R110
100ohm
8
OUTPUT
3
VCC
4
1
VCONT
X100
DSA321SCE-19.2M
GND
2
5
NC1
NC2
6
7
NC3
NC4
VREG_TCXO_2.85V
C144
1000p
C141
0.01u
C143
1000p
C140
0.1u
TCXO_PM
RTR6275_TCXO
TRK_LO_ADJ
TCXO_BT
[Fig. 4.10] Schematic of the TCXO Block
[Fig. 4.11] Test Point of the TCXO Block
TP1
TP2
TP4
TP3
Содержание KF700
Страница 1: ...Service Manual Model KF700 Service Manual KF700 Date May 2008 Issue 1 1 Internal Use Only ...
Страница 157: ... 158 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 167: ... 168 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 193: ...Note ...
Страница 194: ...Note ...