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MOTOROLA HT-1000 Service Manual: Nue7265b, Nue7266b, Nue/pmue7272b, And Nue7274b Uhf (403-470mhz) Transceiver Boards' Schematic Diagram (sheet 2 Of 2)

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13Vdc
C258
4.7uF
CR204
1
6
K1
A1
2
5
K2
A2
3
4
K3
A3
C256
.01uF
8
VMULT2
C257
9
C267
VMULT1
.01uF
.01uF
7
VMULT3
CR206
6
VMULT4
C266
1
2
3
26
.01uF
TST1
NC
NC
5V
K1
K2
K3
27
NC
TST2
CR205
0V
R218
5Vpp (N0te 6)
100K
37
0Vdc (Rx, Tx) (Note 7)
NC
AUX1
Else 4.4 Vdc (Note 6)
39
AUX3
A1 A2
A3
40
NC
AUX4
6
5
4
LCK
35
-7.6 Vdc(Rx) (Note 6)
NC
ADAPTTSW
-7.8 Vdc(Tx) (Note 6)
Else 0 Vdc (Note 7)
41
LOCK
Q201
C284
S
C270
0.22uF
1000pF
29
CPBIAS1
D
1.7Vdc (RX)
1.6Vdc (TX)
28
CPBIAS2
19
R214
SOUT
R215
43K
21
PREIN
43K
38
AUX2
C290
100pF
C271
C294
C250
L223
4.7uF
100pF
L221
390nH
1000pF
390nH
C211
100pF
L208
-23 dBm
1.6 Vdc
390nH
C214
*
L205
2Vdc(RX)
27nH
R209
470
0.7Vdc (RX)
4.3Vdc (TX)
0.1Vdc (RX)
2.25Vdc (TX)
4.6Vdc
C209
.01uF
L204
R220
390nH
2K
L220
R223
27nH
68K
3.3Vdc
1.4Vdc
16
5
7
10
-9dBm
3Vdc (TX)
C292
L224
15
0Vdc (RX)
1pF
RBY
VCC
33nH
U201
4
TX_LO
TX_OUT
SV1
2
VCO BUFFER
RX_OUT
C202
C201
C203
*
1pF
1.5pF
14
1
13
8
12
11
L201
22nH
NC
2.2Vdc (RX)
0.1Vdc (TX)
C204
R210
100pF
330
RX_LO
C205
*
L215
390nH
1.9Vdc (TX)
AGC
IF
C245
1000pF
C274
*
4Vpp
16.8MHz
5Vdc
C279
C280
C260
2.1MHz
R221
100pF
0.1uF
.047uF
20
36
42
25
23
11
1.2K
R211
*
C289
C288
100pF
.01uF
CLK
10
FREFOUT
3
CLK
15
NC
XTAL2
14
2.3Vdc
XTAL1
5
MODIN
C217
C303
100pF
.022uF
D
U204
2
DATA
32
SYNTHESIZER
IOUT
34
IADAPT
C275
SYN
0.1uF
4
EN_CE
24
C216
R212
PVREF
NC
3300pF
R213
TP5
12
750
AD_BYPASS
NC
470
R211
16
1
150
WARP
NC
18
L222
C246
SBASE
NC
270nH
.022uF
17
C247
CAP
0.47uF
30
C253
MODOUT
10uF
C287
.022uF
33
22
13
1
44
43
31
R203
C238
CR207
CR208
22
100pF
L209
C235
L207
390nH
4.3pF
22nH
L219
18nH
C239
10pF
-8dBm
C244
C236
.022uF
5.1pF
C237
C243
3.3pF
8.2pF
CR201
CR209
2.6Vdc
R204
Q202
R205
10K
15K
C240
L210
4.5pF
18.9nH
C208
100pF
C231
R207
10uF
56K
2.5Vdc
R208
C221
C206
L218
2K
C233
.01uF
3300pF
390nH
100pF
-18dBm
CR202
4.5Vdc
C225
C230
1pF
3
L212
22nH
6
R206
C228
10K
9
100pF
C
-12dBm(TX)
C222
C226
2.8Vdc
3.9pF
11pF
L213
100nH
R217
L216
CR203
C223
15K
15nH
L211
4.5pF
11.3nH
C227
C219
C220
100pF
3.9pF
R219
5.1pF
10
NC
NC
NC
NC
NC
D
CLK
9
13
23
14
20
27
7
21
10
25
5V_REG
S1
FOUT
8
22
DE T
SCK
L202
12
24
VOPT
SS
11
U203
32
C282
C254
C255
2.2uH
VREG
NC18
0.1uF
4.7uF
0.1uF
31
26
REF OSC
GND
NC17
1
16.8 MHz
30
NC1
NC16
2
29
NC2
NC15
3
28
NC3
NC14
4 5
6 15 16 17
18 19
16.8MHz
.022uF
1 Vpp
0V OR 5Vdc UNLOCK
2.0Vdc typical
(shield in place)
C52
R18
.018uF
200K
R17
C64
C65
C63
R16
20K
0.1uF
4700pF
0.1uF
2.7K
R32
R34
2.7K
47K
-23dBm
C53
C54
3.8Vdc
0.15uF
39pF
(NOTE5)
C55
CR5
3
33pF
2.5Vdc
1
Q1
C58
2.2pF
2
C56
43pF
73.35MHz
L24
R35
2.8Vdc
180nH
47K
1.7Vdc
TP5 VCTRL
C57
R33
C95
43pF
4.9(RX)Vdc @ 450MHz
8.2pF
2.7K
5.2(TX)Vdc @ 450MHz
6.1(RX)Vdc @ 512MHz
5V_REG
7.4(TX)Vdc @ 512MHz
CR12
7.7(RX)Vdc @ 520MHz
1
9.2(TX)Vdc @ 520MHz
3
L25
2
2.2uH
4.6Vdc (NOTE 5)
R43
C40
L23
*
R53
100pF
R51
560nH
10K
-53dBm (NOTE 5)
1.2K
using 10 pF
1.6Vdc
C59
.01uF
3.4Vdc
C60
C41
C61
0.1uF
0.1uF
0.1uF
-44dBm (NOTE 5)
L36
R41
L20
150nH
22
470nH
R40
R42
C35
C36
*
470
470
5.1pF
F1
SB+
C315
1.0A
100pF
32V
1A
1
U202
8
OUTPUT
INPUT
5
7
C125
NC
ERROR
FEEDBACK
3.3uF
2
3
SENSE
SHUTDOWN
6
5V_TAP
5V REG
7.5Vdc
GND
4
C210
5V_REG
C96
LCK
Q5
.01uF
R1=47K
LOCK=5V
UNLOCK=0V
C49
CLK
0.33uF
3.4Vdc
L301
DURING
390nH
PROGRAMING
D
R45
51K
23
14
18
22
25
19
20
21
29
PINS 31-38 = 2.5Vdc
17
31
SYN
+5V3
C4NEG
C45
13
32
+5V2
C4POS
12
33
0.22uF
Vpp
C3NEG
C44
11
34
+5V1
C3POS
35
0.22uF
1.6Vdc
C2NEG
36
C43
C2POS
U3
6
37
0.22uF
DM_IN
C1NEG
ZIF
5
38
C42
PEAMP_OUT
C1POS
0.22uF
4
28
2.3Vdc
PEAMP_5V
DISC
10
24
RSSI_FLT
RAMPCAP
7
27
DM_BYP
+2.5V1
40
2.5Vdc
C48
AGC
430pF
C47
0.1uF
39
30
1
8 15 16 26 41 3
2
9
1.2Vdc
2.9Vdc (RX) (NOTE 3)
2.5Vdc
C46
0.22uF
R47
2.1MHz
Q4
0
2
3
2.0Vdc
C51
R49
0.1uF
15K
R50
1
1.5K
-36dBm (RX)
R46
(NOTE 5)
1.4Vdc
47K
C50
FREQ=73.35MHz
.01uF
FL1
C38
10pF
1
3
IN
OUT
R48
C39
L22
R44
*
1.8pF
2
4
470nH
680
NUE7265B, NUE7266B, NUE/PMUE7272B, AND NUE7274B UHF (403-470MHz)
TRANSCEIVER BOARDS' SCHEMATIC DIAGRAM (Sheet 2 of 2)
B+
1
BATT+
2
BATT-
GND
3
NC
IS_B+
J301-1
RAW_B+
J301-20
RAW B+
J301-2
SW_B+
J301-3
VCO_MOD
J301-5
REF_OSC_SEL
C304
100pF
J301-4
LOCK_DET
C308
100pF
J301-15
CLOCK
C313
*
J301-14
IF_SEL
C311
3300pF
J301-12
SQ_OUT
C305
100pF
J301-17
SYN_SEL
TO P301
C309
3300pF
1kHz
280mVpp/kHz
DEVIATION
J301-10
DISC
C306
100pF
J301-11
RSSI
C307
100pF
2.1/2.4_MHZ
J301-13
1200mVpp
DAC
J301-7
DAC_SEL
C310
100pF
D
390nH
DATA
L302
5V
J301-6
*
C314
J301-8
GND
J301-9
GND
J301-16
GND
J301-18
GND
J301-19
GND
63B81097C03-O
Sheet2 of 2
69

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This manual also for:

Jt-1000, Mt-2000, Mts-2000

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