4. TROUBLE SHOOTING
- 79 -
4.4 Checking Ant. SW Module Block
ANT_SEL2
ANT_SEL1
ANT_SEL0
M054E
VREG_RFRX_0_2.85V
Antenna Switch Block(Bottom)
4.7nH
L1035
15nH
L1034
KMS-512
SW1002
ANT
G1
G2
RF
GND6
RX_DCS1
12
13
RX_DCS2
RX_EGSM1
16
17
RX_EGSM2
RX_PCS1
14
15
RX_PCS2
3
TX_DCSPCS
1
TX_EGSM
UMTS
8
ANT
7
CTRL1
2
CTRL2
4
11
CTRL3
CTRL4
20
5
GND1
GND2
6
GND3
9
GND4
10
GND5
18
19
U1006
M054E
0.1u
C1108
33p
C1111
15p
C1230
ANT1000
0.5p
C1112
ANT1001
7.5nH
L1031
12
B2
11
B3
10
BGND
15
7
GND1
GND2
8
T__R
6
1
VCCA
14
VCCB
9
_OE
FXL4T245BQX
U1008
2
A0
3
A1
4
A2
A3
5
13
B0
B1
VREG_RFRX_0_2.85V
ANT_SEL2
ANT_SEL1
ANT_SEL0
Schematic of the Antenna Switch Block
Logic Table of the Antenna Switch
Mode
ANT_SEL0
ANT_SEL1
ANT_SEL2
EGSM TX
LOW
LOW
LOW
EGSM RX
HIGH
LOW
LOW
DCS/PCS TX
LOW
HIGH
LOW
DCS RX
LOW
LOW
LOW
PCS RX
HIGH
LOW
LOW
UMTS
LOW
LOW
HIGH
Summary of Contents for U8500
Page 1: ...Date February 2006 Issue 1 0 Service Manual Model U8500 Service Manual U8500 ...
Page 20: ...3 TECHNICAL BRIEF 21 ...
Page 32: ...3 TECHNICAL BRIEF 33 Figure 3 5 6 1 GSM PA functional block diagram ...
Page 35: ...3 TECHNICAL BRIEF 36 Figure 3 5 10 1 Bluetooth system architecture ...
Page 50: ...3 TECHNICAL BRIEF 51 Figure 3 10 3 2 1 PM6650 Functional Block Diagram ...
Page 114: ...4 TROUBLE SHOOTING 115 Loud Speaker U502 U503 Amp ...
Page 118: ...4 TROUBLE SHOOTING 119 C200 C201 for MIC serial capacitor ...
Page 121: ...4 TROUBLE SHOOTING 122 Q404 Q403 Q402 VBATT GND ...
Page 143: ...6 BLOCK DIAGRAM 144 6 3 Interface Diagram U8500 Interface Diagram ...
Page 145: ... 146 ...
Page 154: ... 155 U8500 8 PCB LAYOUT ...
Page 155: ... 156 8 PCB LAYOUT U8500 ...
Page 156: ... 157 8 PCB LAYOUT ...
Page 157: ... 158 8 PCB LAYOUT ...
Page 158: ... 159 U8500 8 PCB LAYOUT ...
Page 159: ... 160 U8500 8 PCB LAYOUT ...
Page 166: ...9 CALIBRATION 167 Click START button U8500 U8500_ver1 1 U8500 U8500 Click U8500 ...
Page 167: ... 168 ...
Page 169: ... 170 ...
Page 194: ...Note ...
Page 195: ...Note ...