Nue7267B, Nue7268B, Nue/Pmue7273B, And Nue7275B Uhf (450-520Mhz) Transceiver Boards' Schematic Diagram (Sheet 1 Of 2) - Motorola HT-1000 Service Manual

NOTES:
1. UNLESS OTHERWISE STATED RX DC VOLTAGES ARE MEASURED WITHOUT RF INTO J401.
2. RX RF VOLTAGES IN DBM ARE MEASURED WITH 1.5PF IN SERIES WITH 50 OHM ADAPTER
OF THE RF MILLIVOLTMETER & A RF LEVEL OF -20 DBM INTO J401.
3. VOLTAGES IN mV ARE MEASURED WITH A X10 SCOPE PROBE.
4. THESE LEVELS MEASURED BY REMOVING R52.
5. MEASUREMENTS MADE ABOVE CROSSOVER FREQUENCY.
6. MEASUREMENTS MADE BELOW CROSSOVER FREQUENCY.
7. * = NOT PLACED
2 5
RF_OUT RF_IN
C132
U104 8.2pF
1 COUPLER 6
4 3
3.9Vdc (TX)
0Vdc (RX)
7 8 9 10
R126 R127
C133
51 30 C155
1.8pF
100pF
NC
CR103
2
R111
3
1K
1
C119
100pF
4.9Vdc (RX)
0Vdc (TX)
SB+
Q104
Q107
1 5 3 2
C154 C145
100pF 100pF
4
5V_REG 4
2 3
5 1
NC
C153
100pF
R199
0
ANTENNA
S101
RF SWITCH
L128 L127
P401 J401
11.03nH 11.03nH
1 3
GND 2
G1
4 TO UNIVERSAL
C151 C150
G2
CONNECTOR 12pF
8 4.3pF
EXTERNAL
ANTENNA
1
P402
TO UNIVERSAL
CONNECTOR C114
5 6 7 9
EXT. ANT. 100pF
2
-34dBm
7.4Vdc (RX)
R22
10K
C86
100pF
C87
R23
100pF 10K
L32
11.03nH
CR8
CR6
CR7 CR9
C1
4.3pF
L30 L31 L35
L34
C2 C3
4.22nH 4.22nH 4.22nH
4.22nH
6.2pF 4.3pF
NC
C120
*
C121
R114 5V_REG
100pF
15K
CR101
2
3 C118
R139
0.1uF
1 DAC CLK D
100K
C156
1uF
R110
C3 B2 A2 A3 B3
4.7K
D1 5Vdc (TX)
SW2
0Vdc (RX)
B5 A4
NC NC EN_BIAS
E2 C4
U102
C117 SW_C TX_DA
100pF
D/A IC
D4 B1
REF_DA SC4
D5
C2
R_T SC3
D2
SC1
0Vdc (RX)
0.55Vdc 450MHz
0Vdc, 520MHz
R115
Q108 C1 E3 E4 D3 B4 C5
180K
5 1 NC NC
R116
130K
4
3 2
6.5Vdc (TX)
L105
270nH
L107
R128 150nH
4.9Vdc (RX)
47K
0.1Vdc (TX)
CR108
6.7Vdc (RX)
C147
5.8Vdc (TX)
100pF
C137
100pF
L126
L122
11.03nH
270nH
C138
100pF
L123
C149 C148
CR109
220nH
13pF 1pF
L108
150nH
L121
270nH
7.4Vdc (RX)
C140
R119
4700pF
1MEG
L8
470nH
FREQ VR (RX)
450MHz 1.14Vdc
512MHz 3.16Vdc 6
520MHz 3.50Vdc
-28dBm
2 7
IN OUT
RF AMPLIFIER
C10 L6 U1
0.6Vdc 4 5 2.4Vdc
56pF 39nH
-32dBm ABP AG2
C9
1 3 8
6.8pF
L7
L37 C13
R36
180nH
15nH 22uF
*
C72
100pF
B+
E104 E101
* 57R01
C105
100pF
C103
C102 C104 C101
10uF 3 2
* 100pF .022uF
P.A.
U105
6.5Vdc (TX) 85Y11
4 1
RFOUT RFIN
C116
NC L103
*
*
L102
*
C108
*
Q101
*
3.2Vdc, 450MHz
3.5Vdc, 512MHz
C109
*
3.6Vdc, 520MHz C110
*
R129
4.7K
R113
2.45Vdc (TX)
33K 5Vdc (TX)
0Vdc (RX)
R106
Q105
C123
3.3K
0.1uF
1 5 C139
*
4
U103
5V REG
5Vdc 0Vdc (RX)
1 3
2 3
OUT IN
C128
2
C126
1uF
3.3uF 1
TP10
0Vdc (RX)
5Vdc (TX)
C141
100pF
C16
30pF
C15
100pF
R26
*
-46dBm
-18dBm (NOTE 4)
CR11
C4 C5 C6
L9 L10
100pF 6.8pF 5.1pF
27nH 12nH
C18 C19 L11 L12
9.1pF 5.6pF 11.03nH 27.42nH
R27
10
C11
C88 C89
.01uF
56pF 4.3pF
NUE7267B, NUE7268B, NUE/PMUE7273B, AND NUE7275B UHF (450-520MHz)
72
TRANSCEIVER BOARDS' SCHEMATIC DIAGRAM (Sheet 1 of 2)
L101
270nH
2.2Vdc (TX)
C106
B+
Q110
4.7uF
R130
*
NC R107
6.8Vdc (TX)
*
7.5Vdc (RX)
C107 C127
*
*
B+
4.9Vdc (TX)
0Vdc (RX)
NC NC
D3 E4 E3 C1
E2 B4
ICATH_2 PA_OUT
A3 B5
RE_DET PA_CNTL
C2
D1
U101 NC
TX12 ANODE_2
C5 D2
NC
DA_REF TX ALC IC RX_1
D5
TEMP_SENSE
B1 C4
ANT_SW_BS 5V_TX
B2 C3
CATH_1 INT_CAP_OUT
1.5Vdc (TX)
A2 B3 D4 A4
R102
4.7K
C115
.047uF
C157
0.1uF
3.3Vdc (TX)
C113
100pF
C135
100pF
L16 R52
470nH 100
C12 C17
100pF 0.1uF
4.9Vdc (RX)
0.1Vdc (TX)
0.4Vdc (RX) 0Vdc (TX)
C83 C85
R7
-50dBm 100pF 10uF
100
-31dBm (NOTE 4)
C7 L14 L15
11pF 11.03nH 11.03nH
4 3
8
RF1
7
RF2
2
C93
L13 14
C92
LOIN
19.61nH
5 1
5.1pF
T1
1.8pF
C99
1
5.6pF
C90 C91 C94 C98
8.2pF 15pF 12pF 20pF
TX_LO
LCK
DAC
DAC
CLK
CLK
D
DATA
2.8Vdc (TX)
0Vdc (RX)
SB+
50K
C111
SB+
RT101
100pF
B+
B+
5V_REG
5V_REG
AGC
C31
.01uF
T2
1 5
IF
3
2
11
IFN
3 4
12
U2
IFP
2
MIXER
BBP
BUFFER
4
4Vdc 1Vdc
BDIV
C84
C82
.01uF
.01uF
5 6 9 10 13
-22dBm (RX)
0.5Vdc
RX_LO
63B81097C04-O
Sheet 1 of 2