Nue7267B, Nue7268B, Nue/Pmue7273B, And Nue7275B Uhf (450-520Mhz) Transceiver Boards' Schematic Diagram (Sheet 2 Of 2) - Motorola HT-1000 Service Manual

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
ADAPTTSW
-7.6 Vdc(Rx) (Note 6) NC
-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
SOUT
R215 21
PREIN
43K
R214 38
AUX2
43K
C271 C250 C290
L221
100pF
4.7uF 1000pF
C294 390nH
L223
100pF
390nH
C211
100pF
-23 dBm 1.6 Vdc L208
390nH
C214
3pF
2Vdc(RX)
L205
18nH R209
470
0.7Vdc (RX)
4.3Vdc (TX)
0.1Vdc (RX)
2.25Vdc (TX)
4.6Vdc
C209
.01uF
R220
2K
R223
L220 L204
27nH 390nH 47K
3.3Vdc
1.4Vdc 16 5 7 10
-9dBm
3Vdc (TX)
C292
L224
15
0Vdc (RX) 1pF
RBY VCC
33nH
4 U201
TX_LO TX_OUT SV1
2 VCO BUFFER
RX_OUT
C202
*
C201 C203
1.5pF
1pF 14 8
1 13 12 11
L201
18nH NC
2.2Vdc (RX)
0.1Vdc (TX)
C204 R210
100pF
330
C205
RX_LO
*
L215
390nH
1.9Vdc (TX)
AGC
IF
C245
1000pF
C274
* 4Vpp
16.8MHz
5Vdc
2.1MHz C279 C280 C260
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
SYNTHESIZER 32
IOUT
34
IADAPT
SYN
C275
0.1uF
4
EN_CE
C216
24
R212
PVREF NC
3300pF
12 750 R213
AD_BYPASS NC
470
R211
16 1
150
WARP NC
18
SBASE NC
17 C247 L222 C246
CAP
0.47uF 270nH
.022uF
30 C253
MODOUT
10uF
C287
.022uF
33 22 13 1 44 43 31
C238
R203
CR207 CR208
10 100pF
C235
L207 L209
5.1pF
390nH
150nH
L219
18nH
C239
6.8pF
-8dBm
C244
C236 .022uF
C237
C243
4.3pF
3.3pF
6.8pF CR201 CR209
2.6Vdc
R204
Q202
R205
10K
15K
C240
L210 4.5pF
14.5nH
C208
100pF
C231
R207
10uF
68K
2.5Vdc
C233
R208
100pF
C221 C206 L218
2.4K
.01uF 2200pF 390nH
-18dBm
CR202
4.5Vdc
C225
C230
1pF L212
3
18nH
6
R206
C228
10K
9 100pF
C
-12dBm(TX) C222 C226
2.8Vdc 4.3pF 9.1pF
L213
R217 390nH
L216
15K
C223 CR203
15nH
L211
4.5pF
9 nH
C227
C219
C220 100pF
3.3pF
R219
6.2pF
0
D
CLK
NC NC NC NC NC
23
9 13 14 20 27 7 21
10 25 5V_REG
S1
FOUT
8 22
DE T SCK L202
24
12
U203
VOPT SS
11 32 C282 C254
2.2uH
VREG REF OSC NC18
0.1uF 4.7uF
26 31
GND 16.8 MHz NC17
1 30
NC1 NC16
2 29
NC2 NC15
3 28
NC3
NC14
4 5 6 15 16 17 18 19 16.8MHz
1 Vpp
0V OR 5Vdc UNLOCK
2.0Vdc typical
(shield in place)
C52
R18
.018uF
200K R17 C64 C65
R16
20K 0.1uF 4700pF R32
2.7K
R34
2.7K
47K
-23dBm
C53 C54
3.8Vdc
0.15uF 39pF
(NOTE5)
CR5 C55
3
33pF
1
2.5Vdc C58
Q1
2.2pF
TP5
C56 2
43pF 73.35MHz
L24
R35
2.8Vdc
180nH
47K 1.7Vdc
R33
C95
TP5 VCTRL 2.7K
C57 8.2pF
4.9(RX)Vdc @ 450MHz 43pF
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)
10K L23 R43
R51 *
R53
560nH
-53dBm (NOTE 5)
1.2K
using 10 pF
1.6Vdc
C59
.01uF
C60
C61
0.1uF
0.1uF
-44dBm (NOTE 5)
L36 L20
R41
150nH 470nH
22
C35 C36
*
5.1pF
R40 R42
470 470
F1
SB+
1.0A
32V
1A
1
U202 8
OUTPUT INPUT
5
C255 7 C125
NC ERROR FEEDBACK
0.1uF 3.3uF
2 3
SENSE SHUTDOWN
6
5V_TAP
5V REG 7.5Vdc
GND
4
C210
.022uF
5V_REG
C63 C96 LCK
0.1uF .01uF Q5
R1=47K
LOCK=5V
UNLOCK=0V
CLK
C49
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
+5V3 C4NEG
C45
13 32
+5V2 C4POS
12 33 0.22uF
Vpp C3NEG
C44
11 34
+5V1 C3POS
0.22uF
35
1.6Vdc C2NEG
C40 36 C43
C2POS
U3
100pF
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
3.4Vdc 40 2.5Vdc C48
AGC
C41 430pF
0.1uF
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
Q4
22
2 3 2.0Vdc
C51
R49
0.1uF
R50 1 15K
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
NUE7267B, NUE7268B, NUE/PMUE7273B, AND NUE7275B UHF (450-520MHz)
TRANSCEIVER BOARDS' SCHEMATIC DIAGRAM (Sheet 2 of 2)
B+
1
BATT+
C315
100pF
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
SYN
J301-17
SYN_SEL
TO P301
C309
3300pF
1kHz
280mVpp/kHz
DEVIATION
J301-10
DISC
C306
100pF
J301-11 RSSI
C307
100pF
2.1MHz
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
63B81097C04-O
Sheet 2 of 2
73