Motorola CDM Series Detailed Service Manual page 282

Section 5: 4-32
VSF_UHF_VC0
R4301
RXSW VSF
5.6K
C4372 C4371
L4304
R4302
0.1uF
NU
10K 390nH
C4305 C4306
2pF
NU
1 P1
L4303
RESONATOR
C4304
C4302 C4303
2
3.9pF
8.2pF
8.2pF
R4303
P2
3 P3
CR4303 CR4302
L4302
390nH
TXSW
CR4301 R4311
L4301
7.5K
390nH
C4301 C4317
100pF NU
VCTRL_UHF_VCO
R4315 L4311
VCTRL
390nH
2.5 - 11 VDC 0
C4316 C4311
0.1uF 100pF
2.6 VDC (Tx)
VCOMOD_UHF_VCO C4325
R4321
3.1 VDC (Rx)
VCOMOD
56K
4.7uF
C4323 C4322
NU NU
UHF 1–25 W PCB 8471224L04 Voltage Control Oscillator
6881091C63-F
VSF
4.58 VDC
C4308
C4355 C4352
L4305
2.2uF 0.1uF
390nH
0.1uF
C4309
R4305
10
100pF
4.54 VDC
Q4301
1
TX_IADJ
2
RX_IADJ
3
SUPER_FLTR
0 VDC (Tx)
4
COLL_RFIN
2.45 VDC (Rx)
5
U4301
RX_BASE
6
50U54
RX_EMITTER
16
C4307
TX_BASE
1.91 VDC (Tx) 15
TX_EMITTER
0 VDC (Rx) 20
FLIP_IN
30 100pF 19
TRB_IN
R4304
180
TRB_UHF_VCO
L4313
390nH
C4318
C4381
0.1uF
NU
C4314
R4312
1.5pF
5.6K
TXSW
4.54 VDC (Tx)
0 VDC (Rx)
R4314
C4315
270
100pF
C4312
12pF
1 P1
C4313
CR4311
R4313
NU
30
2
P2
L4312
3 P3
RESONATOR
C4321
1pF
4.58 VDC
R4322
VSF
10K
CR4321
C4324 R4323
2.4pF
100K
GROUND
VCOBIAS_2_UHF_VCO 0 VDC (Tx)
R4346
2.43 VDC (Rx)
VCOBIAS_2
10K
C4375 5V
NU
5V
5V_UHF_VCO
C4351 C4354 R4361 C4353
100pF 2.2uF 180 0.1uF
L4331
33nH
C4361
C4362
C4332 R4332
100pF
NU
NU
NU
L4361
390nH
TXINJ_UHF_VCO
2.35 VDC TXINJ
(Tx)
4 to 6 dBm C4331
10
R4331
TX_OUT
L4371
8
RX_OUT
4.54 VDC
68nH
(Rx) 6.8pF 22
12
PRESC_OUT
C4373
7
C4363
RX_SWITCH
13
NU
TX_SWITCH
NU
C4374
NU
PRESC_UHF_VCO
PRESC
-18 to -16 dBm (Rx)
-16 to -11 dBm (Tx)
TRB
0 VDC (Rx)
4.97 VDC (Tx)
4.42 VDC (Rx)
0 VDC (Tx)
RXSW
C4382 C4383
NU NU
UHF Band 1 (403–470 MHz) 1–25 W PCB 8471224L04, Schematics, and Parts Lists
Q4333
1 6
2
0 VDC (Tx)
4.7 VDC (Rx)
4
3
R4341
0
C4336
R4337
.022uF
NU
L4333
R4342
390nH
2.2K
L4332
R4336
NU
NU
C4333 C4335
R4339
NU
Q4332
100pF
NU
R4338
R4343
NU
Q4331
1K
NU
R4344
10
R4347
0
R4340
R4334
NU
R4333
NU NU
R4335 C4334
NU NU
SH4301
SHIELD
C4337
RXINJ_UHF_VCO
RXINJ
13.5 to 16 dBm
R4345
51pF
NU C4339
NU
C4338
51pF
SH4302
SHIELD
GND