Motorola CDM Series Detailed Service Manual page 262

Section 5: 4-12
5V_UHF_FN_1 5V_UHF_FN_2
5V
(SOURCE)
VCTRL_UHF_FN_1
2.5 to 11 VDC
VCTRL
LOCK_UHF_FN_1
LOCK
5 VDC (Locked)
0 VDC (Unlocked)
4.97 VDC (25KHZ Chan. Spacing)
0 VDC (12.5KHZ Chan. Spacing)
BWSELECT_UHF_FN_1
BWSELECT
3.05 VDC (RX)
VCOMOD_UHF_FN_1
2.63 VDC (TX)
VCOMOD
16_8MHz_UHF_FN_1
16_8MHz
TRB_UHF_FN_1
TRB
0 VDC (RX)
4.97 VDC (TX)
UHF Band 1 (403–470 MHz) 1–25 W FRACN Synthesizer
6881091C63-F
6.68 VDC
10.87 VDC
C4203
C4201
12.7 VDC
100pF
.01uF
D4201
3
C4202
K3
2
K2
1
K1
.01uF
C4204
100pF
C4205
C4287 C4206
.01uF
10uF
100pF
C4207
R4221
NU
150
R4203
C4221 C4222
R4222 47
.01uF 0.1uF
510
TP4201
R4223
L4221
68
C4224 12uH
C4223 C4225
1uF
NU
510pF
In case Y3261 is used instead of Y3263,
replacement of the following parts requires
new temperature compensation of the frequency:
Y3261, U3201, R3261, R3262, C3262, D3261
4.97 VDC
C4213 C4216
L4201 2.2uF NU
390nH 5V
4
A3
5
A2 R4201 R4211
6
A1
150
0
C4210
R4206
NU
2.2uF
C4208
0.1uF
C4209
C4228
0.1uF
NU
R4228
R4204
47 47K
25
WARP
C4246 16
INDMULT
28
100pF
SFOUT
46
ADAPTSW
4
LOCK
45
IADAPT
43
IOUT
38
TEST2
37
TEST1
3 U4201
AUX4
2
63A27
AUX3
1
AUX2
48
AUX1
11
2.48 VDC VMULT4
12
VMULT3
2.48 VDC
14
VMULT2
15
VMULT1
41
R4241
MODOUT
19
FREFOUT
1.28 VDC
24
220
XTAL2
23
XTAL1
3.48
C4288
C4241
VDC
NU NU
75Z04
C4289
6 OUT 3
0.1uF
C4261 IN
NU
GND GND1
1
C4262
R4262
NU
NU
C4235
.01uF
2
R4263
100
UHF Band 1 (403–470 MHz) 1–25 W PCB 8485670Z02, Schematics, and Parts Lists
C4212
.018uF
U4211
LP2951
IN_5V_RF_REG_UHF_FN_1
1 8
OUTPUT
INPUT
5 7
ERROR FEEDBACK
2
3
SENSE SHUTDOWN
C4211
6
5V_TAP
0.1uF
R4224
47K
4
R4225
C4214
2.2uF
47K
VDDA
D4221
Q4221
C4236
.047uF
TP4202
3.43 VDC
31
NC3
29
NC2
17
NC1
C4227
L4225
30mV - 80mV RMS
42
CCOMP
18
3.79 VDC 15nH
REFSEL
8.2pF
C4226
32
C4230
PREIN
27 1.8pF
2.2uF
SFBASE
26
SFCAP
1.76 VDC (Tx)
R4251
39
4.58 VDC
BIAS2
40
BIAS1
R4252
39K C4252
21 30K C4253
C4255
VBPASS
4.7uF
35
1.78 VDC (Rx) 1000pF
PVREF 100pF
30
SFIN 4.97 VDC
7
DATA
10 2.52 VDC
MODIN
4.97 VDC
9
CEX
8 0 VDC
CLK
C4242 C4245
C4244 C4243
100pF 100pF 100pF
100pF
R4261
47K
L4231
2.2uH
Y4261
C4234
C4231 C4232 C4233
16.8MHz
.01uF .01uF 2.2uF .01uF
NU
D4261
NU
4
C4263
0.1uF
Y4262
1 16.8MHz
VCNTL
4
VCC
GND
5V
C4251
0.1uF
OUT
3
IN_5V_RF_REG
C4215
2.2uF
VDDA_UHF_FN_1
VDDA
VCOBIAS_2_UHF_FN_1
VCOBIAS_2
PRESC_UHF_FN_1
PRESC
C4229
VSF_UHF_FN_1
VSF
C4254
0.1uF
DATA_UHF_FN_1
DATA
MODIN_UHF_FN_1
MODIN
CSX_UHF_FN_1
CSX
CLK_UHF_FN_1
CLK
VDDA
ZWG0130521-B