Motorola PRO Elite Serie Manual De Servicio página 103

Tarjeta de circuito de UHF banda 1, esquemas eléctricos y lista de partes
SH323 SH321
SHIELD SHIELD
1 1
CRYSTAL FILTER SHIELD LVZIF TOP SHEILD
FL301
XTAL
TBD
C323 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 SHEILD
C340
1uF
C339
1uF
C356
Vdd_FILTERED .022uF
C337
L314
100pF
2.2uH
C336
0.1uF
R5
C355
R314
0.15uF
3K
C326 C328
R313
.01uF 0.1uF
330
C327
100pF
R311
30K
C330
10pF
C325
R312
R351
Q302
.01uF 2.4K
0
L330
R315
680nH
12K
Vdda
C347
C346 C345
0.1uF
0.1uF 0.1uF
C343
0.22uF
C357
0.22uF
C358
1200pF
C359
37
C4P
0.1uF
38
MLPD_CR
C3P
39 24 C334
BRP_OFF
C2P
.022uF
40 23
BROWN_VCC
C1P
41 22
FREF
GREEN_VCC
42 21
GND
MIX_BYP
U301
43 20
LVZIF_SEL
CEX
GREEN_VSS
44 19
32D83
CLK CLK
BLUE_VSS
45 18
DATA DATA
BLUE_VCC
46 17
TESTA
MIX_IN
47 16
PREAMP_OUT IOUT
48 15
PRE_AGC
GOLD_VSS
14
COL
13
C338
15pF
RSSI
C361
.01uF
C360
.022uF
Figura 7-5. Diagrama esquemático de la etapa de salida del receptor de UHF
DEMOD
R350
100K
C390
100pF
R344
12K
R355
0
Q320
C383
BFQ67W
100pF 3
C352
12pF
Vdd_FILTERED
2
C349
C351
.022uF
20pF
C350
R324
330pF
2K
16.8MHz
C362 R321
0.1uF 1K
C363
1uF
7-5
R345 C384
10K 56pF
1
C353
43pF R346
56K
C385
L332
56pF
C354
100nH
47pF
L325
2.2uH
R320
CR310
3.9K
C364 R322
8200pF 200K