Motorola 6864115B62-C Detailed Service Manual page 303

UHF 25-40W PCB 8480643Z06 / Schematic
R4301 VSF_UHF_VC0
RXSW VSF
5.6K
C4372
C4371
R4302 L4304
0.1uF
10K 390nH
C4305
C4306
Vac
1 P1
L4303
RESONATOR
C4304
C4302 C4303
3.9pF
8.2pF 8.2pF 2
P2
R4303
30
3 P3
L4302
CR4303
390nH CR4302
TXSW
CR4301 R4311
L4301
7.5K
390nH
C4317
C4301
100pF
Vac
VCTRL_UHF_VCO
L4311
R4315
VCTRL
390nH
2.5 - 11 VDC 0
C4316
C4311
CR4311
0.1uF
100pF
2.6 VDC (Tx)
C4325
VCOMOD_UHF_VCO 3.1 VDC (Rx) R4321
VCOMOD
56K
4.7uF
C4323 C4322
VSF
4.58 VDC
C4308
C4355 C4352
L4305
2.2uF 0.1uF
390nH
0.1uF
C4309
R4305
10
100pF
2pF
VCC_BUFFERS VCC_LOGIC
Q4301
4.54 VDC
1
TX_IADJ
2
RX_IADJ
3
SUPER_FLTR
4
0 VDC (Tx)
COLL_RFIN
2.45 VDC (Rx) 5
RX_BASE
6
RX_EMITTER
16
C4307
TX_BASE
1.91 VDC (Tx) 15
TX_EMITTER
20
0 VDC (Rx)
FLIP_IN
100pF
19
1
TRB_IN
R4304
180
L4313
390nH
C4318
0.1uF
C4381
R4312
0.1uF
5.6K
NU
C4314
1.5pF R4314
C4315
270
100pF
C4312
P1
12pF
1
RESONATOR
C4313
L4312
R4313
30
2
P2
3 P3
C4321
1pF
4.58 VDC
R4322
VSF
10K
C4324
R4323
CR4321
2.4pF 100K
GROUND
0 VDC (Tx)
VCOBIAS_2_UHF_VCO
2.43 VDC (Rx)
R4346
VCOBIAS_2
10K
C4375
0.1uF
5V
NU
C4354
C4351 R4361 C4353
100pF 2.2uF 0.1uF
180
L4331
33nH
C4361
C4332
C4362
100pF
L4361
Vac
390nH
TXINJ_UHF_VCO
2.35 VDC
TXINJ
10 (Tx)
C4331
TX_OUT L4371
8 4 to 6 dBm
RX_OUT
4.54 VDC 68nH
6.8pF
12
(Rx)
PRESC_OUT
C4363
C4373
7
Vac
RX_SWITCH
13
TX_SWITCH
C4374
U4301
50U54
PRESC_UHF_VCO
-18 to -16 dBm (Rx)
PRESC
-16 to -11 dBm (Tx)
TRB_UHF_VCO
TRB
0 VDC (Rx)
4.97 VDC (Tx)
4.42 VDC (Rx)
TXSW 0 VDC (Tx)
RXSW
4.54 VDC (Tx)
0 VDC (Rx)
C4382 C4383
Q4333
1 6
2
0 VDC (Tx)
4.7 VDC (Rx)
5V
3 4
R4341
5V_UHF_VCO
0
C4336
R4337
.022uF
R4342
2.2K
R4332 L4332
R4336
C4333
C4335
R4339
100pF
R4331
Vac
R4338
R4343
Q4331
22
Vac
R4347
0
R4340
R4333
R4334
Vac
R4335 C4334
UHF (403-470MHz) Voltage Controlled Oscillator
4-17
L4333
390nH
C4337
RXINJ_UHF_VCO
13.5 to 16 dBm
RXINJ
51pF
R4345
C4339
Q4332
1K
R4344
C4338
10
51pF
SH4301 SH4302
SHIELD SHIELD
GND
ZWG0130272-A