4. TROUBLE SHOOTING
- 75 -
4.4 Checking Ant. SW Module Block
Antenna Switch Block(Bottom)
ANT_SEL2
ANT_SEL1
ANT_SEL0
M054E
VREG_RFRX_0_2.85V
Schematic of the Antenna Switch Block
Logic Table of the Antenna Switch
10nH
L100
C102
33p
18
19
GND6
12
RX_DCS1
RX_DCS2
13
16
RX_EGSM1
RX_EGSM2
17
14
RX_PCS1
RX_PCS2
15
TX_DCSPCS
3
TX_EGSM
1
8
UMTS
D1040
U100
7
ANT
2
CTRL1
4
CTRL2
CTRL3
11
20
CTRL4
GND1
5
6
GND2
GND3
9
10
GND4
GND5
ANT100
NA
C101
SW100
KMS-512
ANT
G1
G2
RF
ANT102
C100
6.8p
ANT_SEL2
ANT_SEL0
ANT_SEL1
ANT_SEL0
High
Low
Low
Low
Low
Low
Mode
EGSM TX
EGSM RX
DCS/PCS TX
DCS RX
PCS RX
UMTS
ANT_SEL1
Low
Low
High
High
Low
Low
ANT_SEL2
Low
Low
High
Low
High
Low
Содержание U890
Страница 1: ...Date April 2006 Issue 1 0 Service Manual Model U890 U890c Service Manual U890 U890c ...
Страница 3: ... 4 ...
Страница 20: ...3 TECHNICAL BRIEF 21 ...
Страница 46: ...3 TECHNICAL BRIEF 47 Figure PM6650 2 Functional Block Diagram ...
Страница 70: ...4 TROUBLE SHOOTING 71 4 2 SIGNAL PATH ...
Страница 109: ...4 TROUBLE SHOOTING 110 CN600 50pin LCD connector CN901 C907 C911 FB901 FB902 ...
Страница 115: ...4 TROUBLE SHOOTING 116 C226 C227 for MIC serial capacitor ...
Страница 118: ...4 TROUBLE SHOOTING 119 Q400 Q401 Q402 VBATT GND ...
Страница 139: ...Table 2 1 1 RF Block Component 6 BLOCK DIAGRAM 140 ...
Страница 140: ...6 BLOCK DIAGRAM 141 6 2 Interface Diagram U890 Interface Diagram ...
Страница 142: ...6 BLOCK DIAGRAM 143 Top Side ...
Страница 143: ...6 BLOCK DIAGRAM 144 Bottom Side ...
Страница 152: ... 153 8 pcb layout ...
Страница 153: ... 154 8 pcb layout ...
Страница 154: ... 155 8 pcb layout ...
Страница 155: ... 156 8 pcb layout ...
Страница 156: ... 157 8 pcb layout ...
Страница 157: ... 158 8 pcb layout ...
Страница 163: ...9 CALIBRATION 164 9 3 HOT KIMCHI Example Choose_U890 ...
Страница 164: ...9 CALIBRATION 165 Click APPLY button Click START button ...
Страница 165: ...9 CALIBRATION 166 Click Run button to lunch RF AUTOTEST ...
Страница 167: ... 168 ...
Страница 191: ...Note ...
Страница 192: ...Note ...