Motorola CDM Series Detailed Service Manual page 677

UHF Band 2 (450–512/520 MHz) 25–40 W LDMOS PCB 8486250Z02, Schematics, and Parts Lists
4.2 Vdc (Rx)
0 Vdc (Tx)
R5301
VSF_UHF_VC0
5.6K
VSF
RXSW
C5372
C5371
L5304
R5302
100pF
0.22uF 390nH
10K
NU
C5305 C5306
NU 2pF
L5303
RESONATOR
C5303
C5302 C5304
2
4.3pF
4.3pF 5.6pF
R5303
P2
30
CR5303
L5302
220nH
TXSW
0 Vdc (Rx)
CR5302
4.5 Vdc (Tx)
CR5301 R5311
7.5K
L5301
68nH
C5317
C5301
100pF
100pF
NU
C5312
2.5 to 10 Vdc
L5311
R5315
15pF
VCTRL_UHF_VCO
68nH
0
VCTRL
C5316 C5311
CR5311
0.1uF 100pF
C5325
R5321
4.7uF
VCOMOD_UHF_VCO
56K
VCOMOD
C5323 C5322
1000pF 100pF
NU NU
VSF
4.5 Vdc
C5308
0.1uF
C5355 C5352 C5351
2.2uF 0.1uF 100pF
L5305
390nH
C5309
R5305
100pF
10
Q5301
1
TX_IADJ
2
2.3 Vdc (Rx) RX_IADJ
3
0 Vdc (Tx) SUPER_FLTR
4
COLL_RFIN
PRESC_OUT
5 U5301
RX_BASE
50U54
6
C5307 RX_EMITTER RX_SWITCH
16
100pF TX_BASE
TX_SWITCH
15
TX_EMITTER
20
FLIP_IN
19
TRB_IN
R5304
150
Q5311
0 Vdc (Rx)
4.5 Vdc (Tx)
0 Vdc (Rx)
R5381
1.9 Vdc (Tx)
TRB_UHF_VCO
470
L5313
390nH
C5318 C5381
R5312
0.22uF
0.1uF
7.5K
TXSW
0 Vdc (Rx)
C5314
4.5 Vdc (Tx)
3pF
R5314 C5315
220
100pF
L5312
RESONATOR
C5313 R5313
NU 30
2
P2
C5321
1pF
4.5 Vdc
R5322
6.8K
VSF
R5323
C5324
10K
3pF
NU
CR5321
VCOBIAS_2_UHF_VCO
VCOBIAS_2
R5346
10K
C5375
5V
NU
5V_UHF_VCO
C5354
R5361 C5353
2.2uF
180 0.1uF
L5331
33nH
C5332
R5332
C5361
0.1uF
22K
100pF
C5362 NU
NU
L5361 0.22uF
390nH NU
R5360
270
C5364
R5362
5.6pF
TXINJ_UHF_VCO
10
2.58 Vdc (Tx)
TXINJ
10 L5371
TX_OUT
4 dBn (Tx) 68nH
8
RX_OUT
4.5 Vdc (Rx)
R5331
C5373
C5331
12
22
NU
5.6pF
C5363
7 NU
13
C5374
NU
R5363
1K
VSF
L5362 PRESC_UHF_VCO
TRB
39nH
PRESC
4.2 Vdc (Rx)
C5365
0 Vdc (Tx)
3.3pF
RXSW
C5382 C5383
100pF 100pF
NU NU
UHF Band 2 (450–512/520 MHz) 25–40 W LDMOS Voltage Controlled Oscillator
Q5333
47K
4.7K
47K
4.5 Vdc (Rx)
10K
0 Vdc (Tx)
R5341
0
R5337
C5336
0
.022uF
NU
L5333
R5342
390nH
2.2K
L5332
15nH
R5336
NU
1K
NU
C5333
R5339
51pF
C5335
22
NU 100pF
NU
Q5332
R5338
220
R5343
NU
1K
Q5331
NU
R5344
10
R5347
0
R5340
220
R5333
NU
10K
R5334
NU
0
NU
C5334
R5335
10 51pF
NU NU
SH5302 SH5301
SHIELD SHIELD
1 1
GND
ZMY0130674-O
Section 13: 4-7
C5337
51pF
RXINJ_UHF_VCO
RXINJ
>14 dBn (Rx)
C5339
R5345
NU
NU
C5338
51pF
6881091C63-F