Motorola Uhf Schematics Manual

UHF 1-25W Band1 PCB 8485670z02 / Schematics4-3
2.0 UHF 1-25W Band1 PCB 8485670z02 / Schematics
TOP METAL
C0101C0102 C0104
C0106
C0107
C0131
C0132 C0211
C0212
C0221
C0222
C0223
C0224
C0225
C0226
C0227C0228
C0231
C0232
C0233
C0234C0235
C0236
C0237
C0241
C0242
C0243
C0244C0245 C0246
C0251
C0252C0253
C0256
C0261
C0262
C0421C0441
C0442
C0443
C0445
C0446
C0447
C0448
C0449
C0470
C0471
C0472
C0473
C0474
C0476
C0477
C0478
C0482
C0483
C0484
C0486
C0487
C0488
C0490
C0493
C0494
C0495 C0496
C0501
C0502
C0503
C0504...

4-4UHF 1-25W Band1 PCB 8485670z02 / Schematics
C0103 C0105
C 0 111 C0112C0121
C0122 C0123
C0141
C0151
C0201C0202C0203
C0204 C0205
C0254C0255
C0265
C0266C0267
C0271C0272
C0273C0274
C0275
C0276
C0277
C0301
C0302
C0303C0304
C0305 C0324C0325
C0331
C0341
C0342
C0343
C0344
C0351
C0352
C0353C0354 C0422C0423
C0426
C0427
C0428
C0429
C0430
C0431 C0485C0491 C0492
C0497
C0499C0541C0554 C0558C0559
C0560C0575
C0576 C0591
C0592
C0593
C0611
C0621C0622
C0641
C0644C0645
C0661 C0662
C0663
C0671 C3104
C3110 C 3 111
C3112...

UHF 1-25W Band1 PCB 8485670z02 / Schematics4-5
NU NU
NU
NUNUwidth 2.032
0.8x25 1.542x42.216x__J4401 - BNC
7.5
NU A
NU
NU
RXIN 9V3
NUNU
INT_SWB_UHF_PA_1L4437
17nH
8.2pF
R4475
10K
C4441
15
100 R4402
2.7R4432
R44272.7 R4425
R4501
6.8K 2200pF C4427 C4424
15pFC4453
100pF
39K R4443 MOSBIAS_222pF C4431
C4506
2200pF 100pF C4406
36pF C4472
1uF C4505 C4413
NU
C4434 C4455
13pF
0.1uF10K R4454
FECTRL_2_UHF_PA_1 2.7K R4452
R4421
27K L4402
57R01
0.1uF C4425
20K R4507 C4423
1uF
LM50
GND
3 1
POSVOUT2FECTRL_2
U4502...

4-6UHF 1-25W Band1 PCB 8485670z02 / Schematics
NU
0 VDC (RX)
NU NU
3.43 VDC
3.05 VDC (RX)
NU
4.97 VDC
2.48 VDC
NU
NU
4.58 VDC 3.79 VDC
2.48 VDC 4.97 VDC (25KHZ Chan. Spacing)
1.78 VDC (Rx)
4.97 VDC (TX) 5 VDC (Locked)10.87 VDC
1.28 VDC
NUNU
NU
0 VDC (Unlocked)
2.63 VDC (TX)
VDC 4.97 VDC
NU
0 VDC (12.5KHZ Chan. Spacing)
2.52 VDC 2.5 to 11 VDC
1.76 VDC (Tx)30mV - 80mV RMS 12.7 VDC
0 VDC 4.97 VDC
NU1.8pF
(SOURCE)
NU
3.48  6.68 VDC
TP4201C4204
100pF
R4204
472.2uF C4214 INPUT8
OUTPUT 1
SENSE 2
SHUTDOWN3...

UHF 1-25W Band1 PCB 8485670z02 / Schematics4-7
NU NU
NU
0 VDC (Tx)
NUNU
NU
NU
2.5 - 11 VDC0 VDC (Rx)
4.58 VDC 4.58 VDC
NUNU
13.5 to 16 dBm 
NU
0 VDC (Tx)
3.1 VDC (Rx)0 VDC (Tx)
4.7 VDC (Rx)
NU
(Tx)
4.54 VDC
0 VDC (Tx)2.35 VDC 
NU
0 VDC (Rx)4.42 VDC (Rx)
NUNU
NUNU
NUNU
NUNU
NUNU
NUNUNU
NU NUNU
4.97 VDC (Tx)-18 to -16 dBm (Rx)
-16 to -11 dBm (Tx) 4 to 6 dBm 4.54 VDC
4.54 VDC (Tx)
2.6 VDC (Tx)1.91 VDC (Tx)
0 VDC (Rx) 2.45 VDC (Rx)(Rx)2.43 VDC (Rx)
NU
NU
GND C4301
100pF
30 R4313 C4372
VCTRL_UHF_VCOL4331
33nH...

4-8UHF 1-25W Band1 PCB 8485670z02 / Schematics
R4066C4069
R4070
.01uF
C4068
100pF
C4065390
C4064
0.1uF
0
100pF390
R4064R4062
1.5K
R4063R4072
10KR4071
10K
C4062
0.1uF R4061
10K
C4061
330pF
R4069
1KR4068
C4066 1.5K
C4067
3300pF
R4054
R4055 R4053
R4052
0 C4060 R4060
330K
L4008
470nH R4022
L40060
R4020C4051
15nH10pF
L4054C4031
13pF
15nH L4053
27nH
C4055
6.2pF
NUC4054
16pFC4053R4051
16pFC405251
L4051
82pF150nHL4005
L4001L4002L4004 C4010
1.8pF 330pF
C4029
C4027C4030
1.8pF
1.8pF
1.8pF C4026
R4013R4015
270...

UHF 1-25W Band1 PCB 8485670z02 / Schematics4-9
9180468v04
9180468V06 3.9VDC
 12.5kHz  0VDC
20/25kHz  5VDC 9180469V03
3VDC9180469V069180469V04
0.75VDC
0.75VDC3VDC
R3117
27K
Q3102
10 R3112 IF
1.8K R314210K
27pFR3154
C3140
0.1uF C3110
620nHL3111 620 R3108
5
CNTL4
314VDD7VSS
C3144 U3115-2
C3143 0.1uF
120pF R3115
390
R3118
6.8K
R3111
12K 5V_VHF_IF_1Q3151
NU C3113 NUR3104
22pF C3115VDD
14VSS7
Q3141 MC74HC4066
U3111-1CNTL
131
2
R3116
330
82pFC3112Q3152
R3135
1.2K
DISCAUDIO_VHF_IF_1BWSELECT_VHF_IF_1
R3101...

4-10UHF 1-25W Band1 PCB 8485670z02 / Schematics2.1 UHF PCB 8485670z02 Parts List 1-25W
Circuit 
RefMotorola 
Part No.DescriptionC3101
2113740F34
20pF
C3102 2113740F31 15pF
C3103
2113740F39
33pF
C3104 2113743E20 0.1uF
C3110
2113740F37
27pF
C3111 2113743E20 0.1uF
C3112
2113740F49
82pF
C3114 2113740F33 18pF
C3115
2113740F35
22pF
C3116 2113743E20 0.1uF
C3121
2113743E20
0.1uF
C3122 2113743E11 0.039uF
C3123
2113743E11
0.039uF
C3132 2113743E20 0.1uF
C3133
2311049A57
10uF
C3134 2113743E20 0.1uF
C3135
2113740L30...

UHF 1-25W Band1 PCB 8485670z02 / Schematics4-11CR4303 4862824C01 DIODE VARACTORCR4311
4802245J22
DIODE, VARACTOR
CR4321 4862824C01 DIODE VARACTOR
D3101
4880154K03
DIODE DUAL SCHOTTKY
D4001 4862824C01 DIODE VARACTOR
D4002
4862824C01
DIODE VARACTOR
D4003 4880154K03 DIODE DUAL SCHOTTKY
D4004
4862824C01
DIODE VARACTOR
D4005 4862824C01 DIODE VARACTOR
D4006
4880142L01
Diode
D4007 4813833C02 DIODE, DUAL 70V
D4051
4886143B01
DIODE, MIXER
D4201 4802233J09 DIODE, TRIPLE
D4221
4813825A05
DIODE
D4451 4813825A05...

4-12UHF 1-25W Band1 PCB 8485670z02 / Schematics
* Motorola Depot Servicing only
Reference designators with an asterisk indicate 
components which are not fieldreplaceable 
because they need to be calibrated with 
specialized factory equipment after installation. 
Radios in which these parts have been replaced in 
the field will be off frequency at temperature 
extremes. R4474 0680194M18 51
R4475
0662057A73
10K
R4491 0662057A73 10K
R4501
0662057A69
6.8K
R4502 0662057A97 100K
R4504
0662057A73
10K
R4505...