Main Pcb (Rf Band) - Panasonic EB-VS3 Service Manual

12.2. Main PCB (RF Band)

ANTENNA BLOCK
900 MHz : 32.45 dBm
1800 MHz : 29.25 dBm
1900 MHz : 29.25 dBm
CN102
C104
1
5p
-50 dBm
CN101
U103
ANTENNA SWITCH MODULE
G1
G2 GND-11
11
C ANTENNA GND_OR_N.C-9
12
A 27p GND-13
13
VC2 GSM850/GSM900/RX
14
GND-15 GND_OR_N.C-6
15
DCS/PCS/TX DCS/RX
16
[ASM]
GND-17 PCS/RX
17
GND-18 GND-3
18
GND-19 GSM850/GSM900/TX
19
GND-20 GND-1
20
MATCHING CIRCUIT
0
31.5 dBm 34 dBm
GSM_OUT
11
GND-12
12
[PA]
GND-13
13
GND-14
14
DCS/PCS_OUT
15
U102
PA MODULE
VBAT_PA
OPERATING MODE VC1 VC2 VC3
GSM 850/900 H L L
DCS/PCS L H L
RX BLOCK
MATCHING
RX TOP SAW
CIRCUIT MATCHING CIRCUIT
-53.4 dBm
-51.3 dBm
2 5
C216 0.5p L208
L214
1
4 L209
2.2nH
3
FL203
VC1
10
9
VC3
-53.35 dBm
8
-51.25 dBm
7 2 5
C217 0p L210
L213
6 1
4 L211
5 1nH
3
4
FL202
3
2
-52.6 dBm
1
-50.7 dBm
2 5
4 C215 0.75p L206
C221
1
3 L207
47p
FL201
L106
6.8nH
R125 1k
VRF0 : 1.5 V
VRF0
R110
1 UNBALANCED_PORT
3
4
2 GND_OR_DCFEED+RFGND
3 BALANCED_PORT-3
2 1
50
(1dB)
VRF0 : 1.5 V
GND-5 VRF0
5
GSM_IN R127
4 1
DCS/PCS_IN
3 2
VCC1A 0
2 3 4 3
BS
1
R109
50
(1dB)
2 1
R124 0
Enable
1.4 Vp-p
Square Wave
Enable
2.7 Vp-p
Square Wave
TP518
SYNC BLOCK
VRF1 VRF0
VRF0 : 1.5 V
VRF1 : 2.5 V
VRF2 : 2.7 V
VRF0 VRF0 VRF1
C211 C210
560p 560p
5.1nH
5.1nH
25
VDDDEM2
26
RX4
27
RX4X
28
VDDLNA-28
6.2nH 29
RX3
[RF]
6.2nH 30
RX3X
31
RX2
32
U101
RX2X
TRANSCEIVER
33
VDDLNA-33
34
RX1
NC
VRF0
35
RX1X
NC
18nH 36
VDDDEM1
18nH
VRF0 VRF1
U105
6
NC
5
GND
4
BALANCED_PORT-4
GSM BALUN
U106
6
UNBALANCED_PORT
NC
5
GND_OR_DCFEED+RFGND
GND
4
BALANCED_PORT1 BALANCED_PORT-2
DCS/PCS BALUN
– 12-2 –
OPERATING MODE
VRF1
GSM 850/900
DCS
PCS
R301 R302
3.3k 820
VRF2
VRF0 VRF1 VRF0
R304 12K 1%
12
PLLREFR
11
EN
10
DA
9
CLK
8
U401 VCTCXO
DAO
C401
7
4 1
FSYS
+DC VC
6 0.01u
3 2
VDDBFIL
OUTPUT GND
5
VDDDIG
4 1 Vp-p
N.C.
R407 12
3
BUFEN
C410
2
BUFOUT
1
0.01u
VDDBUF
IQ Signal
1.2 V
VC[1]
VC[1]
H : 2.7 V
VC[2]
VC[2]
L : 0 V
VC[3]
VC[3]
VC1 VC2 VC3
L L L
L L L
L L L
CLK DATA EN
3.0 Vp-p
Square Wave
TCXO BLOCK
EN
R403 10k
EN
R405 10k 0 DA
DA
R404 10k 0 CLK
CLK
R401 10k
AFC
AFC
1 Vp-p
BB_SYS_CLK
BB_SYS_CLK
QX
QX
Q
Q
IX
IX
I
I
VRF0
VRF0
VRF1
VRF1
VRF2
VRF2
VBAT_PA
VBAT_PA
RF_TEMP
RF_TEMP
PALEVEL
PALEVEL
TXON_PA
TXON_PA