Motorola PRO3150 Manual De Servicio página 205

SH323 SH321
SHIELD SHIELD
1 1
CRYSTAL FILTER SHIELD LVZIF TOP SHIELD
-51.4dBm@45.1MHz
FL301
-55.1dBm@45.1MHz
XTAL
TBD
C323
R351
L311
150pF
750nH
6 3
IF IN OUT
R352
C324
3.3K
20pF
L331 R343
2.2uH 10
Vdd_FILTERED
C382
(SOURCE)
10uF
C348
C344
0.1uF
0.1uF
C329
0.1uF
SH322
SHIELD
C342
1uF
C341
1
1uF
LVZIF BTM SHIELD
C340
37
1uF
38
39
C339
40
1uF
41
42
43
C356
44
Vdd_FILTERED
.022uF
45
C337 46
L314
100pF
47
2.2uH
48
C336
0.1uF
R5
C355
R314
0.33uF
3K
C338
15pF
C326 C328
R313
.01uF 0.1uF
330
C327
2.683V
100pF
R311
30K
C330
10pF
C325
R312
Q302
.01uF 5.6K
0
L330
R315
680nH
12K
0.706V
Figura 4-92. Diagrama esquemático de la etapa de salida del receptor de rango 2 de UHF (450-527 MHz) (tarjeta de circuito impreso nº 8485755Z04)
Vdda
C347
C346 C345
0.1uF
0.1uF 0.1uF
C343
0.22uF
R344
12K
C357
0.22uF
C358
1200pF
C359
C4P
0.1uF
MLPD_CR
C3P
24
C334
BRP_OFF
C2P
.022uF
23
BROWN_VCC 16.8MHz
C1P
22
FREF
GREEN_VCC
21
GND
MIX_BYP
U301
20
LVZIF_SEL
CEX
GREEN_VSS
19
32D83
CLK
CLK
BLUE_VSS
18
DATA DATA
BLUE_VCC
17
TESTA
MIX_IN
16
PREAMP_OUT IOUT
15
PRE_AGC
GOLD_VSS
14
COL
13
RSSI
C360
.022uF
DA
C361
.01uF
DEMOD
R350
100K
C390
100pF
DB
R355
0
Q320
2.628V
3.185V
C383
BFQ67W
3
100pF
1
C352
12pF
Vdd_FILTERED
2
2.095V
C349
C351
.022uF
20pF
C354
C350
R324
47pF
330pF
2K
R320
1K
C364
C362 R321
.01uF
.022uF 2.4K
C363
2.2uF
ZMY0130409-O
4-153
R345 C384
10K 56pF
C353
43pF
R346
56K
C385
L332
56pF
100nH
L325
2.2uH
CR310
R322
200K