Motorola 6864115B62-C Detailed Service Manual page 321

UHF 25-40W Band1 PCB 8486127Z01 / Schematics
5V_UHF_FN_1 5V_UHF_FN_2
(SOURCE) 5V
C4205
C4287
.01uF
100pF
VCTRL_UHF_FN_1
2.5 to 11 VDC
VCTRL
C4221
.01uF
LOCK_UHF_FN_1 TP4201
LOCK
5 VDC (Locked)
0 VDC (Unlocked)
C4223
NU
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 (403-470 MHz) 25-40W FRACN
6.68 VDC
10.87 VDC
C4203
C4201
12.7 VDC
100pF
.01uF
D4201
4
3
C4202
K3 A3
2 A2 5
K2
1 A1 6
K1
.01uF
C4204
100pF
C4206
10uF
C4207
C4209
0.1uF
R4221
NU
150
R4203 R4204
C4222
R4222 47 47
0.1uF
510
R4223
L4221
68
C4224 12uH
C4225
1uF
510pF
C4288
NU
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
1
OUTPUT
5
ERROR
2
SENSE
C4213 C4216 6
5V_TAP
L4201
2.2uF NU
390nH
5V
R4201 R4211
150
0
C4210
R4206
D4221
NU 2.2uF
C4208
0.1uF
C4228
NU
R4228
47K
25 31
WARP NC3
C4246 16 29
INDMULT NC2
100pF 28 17
SFOUT NC1
46
ADAPTSW
4 42
LOCK CCOMP
18
45
IADAPT REFSEL
43
IOUT
U4201
32
PREIN
38 27
37 TEST2 SFBASE
26
TEST1 SFCAP
3 39
2 AUX4 BIAS2
40
1 AUX3
BIAS1
48 AUX2
21
AUX1 VBPASS
35
63A27
PVREF
11
2.48 VDC 12 VMULT4
30
14 VMULT3 SFIN
2.48 VDC
7
VMULT2 DATA
15 VMULT1 10
MODIN
9
41
R4241
MODOUT CEX
8
19
FREFOUT
CLK
1.28 VDC
24
220
XTAL2
23
3.48 XTAL1
C4241
VCP
VDC
NU
R4261
47K
Y4261
16.8MHz
75Z04
C4289
NU
6 OUT 3
0.1uF
C4261 IN
NU
GND
GND1
1 4
Y4262
C4262
R4262
1 16.8MHz
NU
NU
C4235
VCNTL
.01uF
VCC
2 GND
R4263
OUT
100
3
C4212
.018uF
U4211
LP2951
IN_5V_RF_REG_UHF_FN_1
INPUT 8
FEEDBACK 7
SHUTDOWN 3
C4215
C4211
2.2uF
0.1uF
GND
R4224
47K
4
VDDA_UHF_FN_1
R4225
C4214
2.2uF
47K
VDDA
Q4221
C4236
.047uF
VCOBIAS_2_UHF_FN_1
TP4202
3.43 VDC
PRESC_UHF_FN_1
C4227
L4225
30mV - 80mV RMS
3.79 VDC 15nH
10pF
C4229
C4226
C4230
1.8pF
2.2uF
1.76 VDC (Tx)
R4251 4.58 VDC
VSF_UHF_FN_1
R4252
39K C4252
C4253
30K
C4254
C4255
1.78 VDC (Rx) 4.7uF
0.1uF
1000pF
100pF
DATA_UHF_FN_1
4.97 VDC
MODIN_UHF_FN_1
2.52 VDC
CSX_UHF_FN_1
4.97 VDC
0 VDC
CLK_UHF_FN_1
C4242 C4245
C4244 C4243
100pF 100pF
100pF 100pF
VDDA
L4231
2.2uH
C4234
C4231 C4232 C4233
.01uF
.01uF .01uF 2.2uF
D4261 C4263
NU
0.1uF
4
5V
C4251
0.1uF
4-35
IN_5V_RF_REG
VDDA
VCOBIAS_2
PRESC
VSF
DATA
MODIN
CSX
CLK
ZWG0130521-B