Motorola 6864115B62-C Detailed Service Manual page 313

UHF 1-25W Band1 PCB 8485670Z03 / Schematics
VSF_UHF_VC0
R4301
RXSW VSF
5.6K
C4371
C4372
R4302
L4304
0.1uF
100pF
10K
390nH
NU
C4305 C4306
1pF 2pF
NU
1 P1
L4303
C4304
RESONATOR
C4302 C4303
3.9pF
2
8.2pF 8.2pF
R4303
P2
30
3 P3
CR4303
L4302
CR4302
390nH
TXSW
CR4301
R4311
L4301
7.5K
390nH
C4317
100pF
C4301
100pF NU
VCTRL_UHF_VCO
C4312
R4315 L4311
VCTRL
390nH
2.5 - 11 VDC
0 12pF
C4311
C4316
100pF
0.1uF CR4311
2.6 VDC (Tx)
VCOMOD_UHF_VCO C4325
3.1 VDC (Rx) R4321
VCOMOD
56K
4.7uF
C4323
C4322
1000pF 100pF
NU NU
VCOBIAS_2
VSF
4.58 VDC
C4355 C4352
C4351
C4308
2.2uF 0.1uF 100pF
L4305
0.1uF 390nH
C4309
R4305
C4361
10
100pF 1000pF
U4301
50U54
14
18
VCC_LOGIC
Q4301
4.54 VDC VCC_BUFFERS
1
TX_IADJ TX_OUT
2 RX_OUT 8
RX_IADJ
3
SUPER_FLTR
0 VDC (Tx) 4 PRESC_OUT 12
COLL_RFIN
2.45 VDC (Rx) 5
RX_BASE
6 RX_SWITCH 7
RX_EMITTER
C4307
16 TX_SWITCH 13
TX_BASE
1.91 VDC (Tx) 15
TX_EMITTER
0 VDC (Rx) 20
FLIP_IN
100pF
19
TRB_IN
R4304
GND_BUFFERS
GND_FLAG GND_LOGIC
180
9
11 17
TRB_UHF_VCO
R4381
L4313
390nH
470
0 VDC (Rx)
C4381
C4318
4.97 VDC (Tx)
0.1uF
0.1uF
R4312
NU
5.6K
TXSW
C4314
1.5pF R4314 4.54 VDC (Tx)
270
0 VDC (Rx)
C4315
100pF
1 P1
C4313
1pF
R4313
C4319
30
NU 3.9pF
NU
2
P2
L4312
RESONATOR
3 P3
C4321
1pF
4.58 VDC
R4322
VSF
10K
CR4321
C4324
R4323
2.4pF
100K
GROUND
0 VDC (Tx)
VCOBIAS_2_UHF_VCO
2.43 VDC (Rx)
R4346
C4375
10K
0.1uF
NU 5V
5V_UHF_VCO
C4354
C4353
R4361
2.2uF
180 0.1uF
L4331
33nH
C4362
C4332
L4361 0.22uF
0.1uF
33nH NU
R4360
270
C4364
5.6pF
TXINJ_UHF_VCO
R4362
2.35 VDC
TXINJ
C4331
10 (Tx)
10
L4371
4 to 6 dBm
4.54 VDC
68nH
(Rx) 6.8pF
C4363
1pF
C4373
NU
1pF
NU
C4374
1pF
NU
R4363
VSF
1K
NU PRESC_UHF_VCO
L4362
PRESC
33nH
-18 to -16 dBm (Rx)
C4365 -16 to -11 dBm (Tx)
TRB
3.3pF
4.42 VDC (Rx)
0 VDC (Tx)
RXSW
C4382 C4383
100pF
100pF
NU
NU
Q4333
1 6
2
0 VDC (Tx)
4.7 VDC (Rx)
5V
3 4
R4341
0
C4336
R4337
.022uF
0
NU
R4342
R4332
L4332
22K R4336
15nH
1K
NU NU
NU
NU
R4339
C4333
C4335
22
NU
51pF
100pF
R4331
R4338
NU
220
R4343
22
Q4331 NU
MMBR941
NU
R4347
0
R4340
R4333
220
10K
R4334
NU
NU
0
NU
R4335
C4334
10
51pF
NU
NU
UHF (403-470 MHz) Voltage Controlled Oscillator
4-27
L4333
390nH
2.2K
C4337 RXINJ_UHF_VCO_1
RXINJ
R4345 13.5 to 16 dBm
51pF
0 C4339
1pF
NU
Q4332
NU
1K
C4338
R4344
10 51pF
SH4301 SH4302
SHIELD SHIELD
GND
ZWG0130624-O