3. TECHNICAL BRIEF
- 64 -
DCS
RF Transceiver
GSM850
PCS
EGSM
2.2p
NA
C446
11
XO
XOX
12
18nH
L405
RX4X
23
TX1
36
37
TX2
VBIAS
34
VCO_RC
18
VDDBIAS2V8
31
VDDDIG1V5
8
5
VDDDIG2V8
VDDLNA1V5
21
39
VDDMIX2V8
19
VDDRX1V5
VDDRX2V8
20
35
VDDTX1V5
VDDTX2V8
38
17
VDDVCO2V8
15
VDDXO2V8
32
FE1
33
FE2
FSYS1
14
FSYS2
10
9
FSYS3
13
GND1
26
GND2
GND3
40
41
GND4
RX1
29
30
RX1X
RX2
27
28
RX2X
24
RX3
RX3X
25
22
RX4
PMB6272
U404
1
A
AX
2
3
B
BX
4
7
CLK
DA
6
EN
16
10p
C440
C425
0.1u
C467
100p
NA
VRF1V5
C423
VRF1V5
NA
C449
0
R425
NA
L404
2.2u
C435
R436
100
VRF2V85
R412
0
R415
10
C431
NA
R432
0
R438
0
NA
VRF2V85
NA
C455
C454
C442
4700p
0.1u
C424
R416
0
C463
NA
1.2p
R424 0
C427
NA
0.1u
C443
460
8u
C445
NA
VRF2V85
R434
0
VRF2V85
2.2u
C434
NA
C462
0
R422
NA
C459
VRF2V7
NA
0.1u
C426
100
R437
0
R418
100p
C464
4.7u
C432
100
R435
470p
C433
1.5p
C456
47n
C444
100p
R414
820
1V5_Core
26MHz
X401
2
GND
3
OUT
VCC
4
VCONT
1
100p
C452
2.2p
100p
C465
R426
10
NA
C448
1.5p
R421
0
VRF2V7
NA
NA
C466
1.2p
5.6nH
L407
0
R431
R419
0
R427
0
0
R433
R417
1.8K
NA
C458
5.6nH
L406
IX
I
VC4
FSYS2
EN
CLK
QX
Q
VC2
VC3
DA
26M_BB
VC1
AFC
Figure 35 RF transceiver PMB7262 SMARTi-PM functional block diagram
Figure 36 RF transceiver PMB7262 SMARTi-PM schematic
Summary of Contents for Prada KE850
Page 1: ...Date March 2007 Issue 1 0 Service Manual Model KE850 Service Manual KE850 ...
Page 3: ... 4 ...
Page 5: ... 6 ...
Page 71: ...4 PCB layout 72 Main PCB bottom Main PCB bottom placement ...
Page 115: ... 116 6 Download S W upgrade 6 Press the START button ...
Page 117: ...6 Download S W upgrade 118 KE850 KE850P40 7 V09a KE850 KE850P40 7 V09a ...
Page 127: ... 128 LGMC 8 pcb layout ...
Page 128: ... 129 LGMC 8 pcb layout ...
Page 129: ... 130 LGMC 8 pcb layout ...
Page 130: ... 131 LGMC 8 pcb layout ...
Page 131: ... 132 8 pcb layout ...
Page 132: ... 133 8 pcb layout ...
Page 133: ... 134 8 pcb layout ...
Page 134: ... 135 8 pcb layout ...
Page 135: ... 136 8 pcb layout ...
Page 136: ... 137 8 pcb layout ...
Page 137: ... 138 ...
Page 149: ... 150 ...
Page 151: ... 152 ...
Page 172: ...Note ...
Page 173: ...Note ...