Kenwood TKR-750 Service Manual page 52

Vhf fm repeater
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INT SP
DISPLAY UNIT A/2
X54-333*-**
20
W10
SB
5V AVR
SB
NC
GND
5V AVR
PSW
DAT
CLK
STB1
PTT/TXD
SOE
HK/RXD
K1
K3
K2
K5
K4
5C
VLI
MIC
MIG
1
CN502
W11
NC
8
SB
4
GND
7
PTT
3
DISPLAY UNIT B/2
MIG
6
MIC
2
HOOK
X54-333*-**
5
NC
1
J601
CN605
1
SPO
SPG
2
TX-RX UNIT B/2
X57-695*-**
CN602
W9
1
8C
8C
1.8C
1.8V AVR
NC
SB
SB
3.3D
3.3V AVR
SB
SB
NC
QS
CN600
GND
5V AVR
1
GND
SB
MO
SB
MB
GND
3.3A
3.3V AVR
GND
NC
SOE
DAT
TMP
PSW
PSW
STB1
BUP
CLK
5C
5V AVR
LD2
SOE
FWD
TXD1
STB
K1
CK
5M
5V AVR
8C
RXD1
DT
K2
LDT
K3
LDR
SB
K4
EPT
SB
K5
EPR
VLI
CP
5C
DP
MIG
SC
MIC
RSSI
20
ASQ
GND
NC
DET
NC
36
CN606
29 30
NC
NC
NC
NC
RXD2
NC
TXD2
EMON
AI1
EPTT
CN601
AI2
SC
1
AI3
NC
TXO
DG
TXG
TXI
TD
AIO1
RXO
TA
AIO2
AC
RD
AIO3
RA
AIO4
BC1
BC2
RXG
AIO5
BC3
SPM
AIO6
BC4
NC
NC
PTI
1 2
CLRC
RXI
PTO
NC
GND
14
CN18
TX-RX UNIT A/2
X57-695*-**
CN15
1
E
36
SB
B
B
8C
8C
3
8CR
8V AVR
NC
SB
SB
5CR
5V AVR
SB
SB
CN16
NC
8
8CT(8C)
8V AVR
QS
TMP
GND
BUP
GND
PDT
MO
5CT
5V AVR
FAS
MB
PC
GND
8T
SOE
9C
9V AVR
NC
TMP
GND
PSW
1
BUP
LD2
FWD
STB
CN19
CK
DT
SUB UNIT
LDT
(RX VCO/PLL)
LDR
EPT
X58-478
EPR
CP
DP
SC
RSSI
ASQ
GND
SUB UNIT
NC
(TX VCO/PLL)
DET
NC
X58-479
1
CN14
NC
NC
RXD2
EMON
TXD2
EPTT
AI1
SC
AI2
NC
AI3
TXG
DG
AIO1
TD
AIO2
TA
AIO3
RD
AIO4
RA
AIO5
RXG
AIO6
SPM
CONTROL I/O
TEST/SPKR
3
6
9
12
15
2
5
8
11
14
1
4
7
10
13
CN6
MAIN DC
W3
W6
CN5
1
CN8
W4
E
+B
GND
B
W5
B
BACKUP
3
CN7
W7
CN3
1
TMP
BUP
PDT
FAS
FINAL UNIT A/2
PC
CN4
8T
1
X45-373*-**
NC
FAB
GND
FAG
8
2
CN1
W8
9
12
RX ANT
+B1
+B1
+
MAIN DC
GND
GND
+B2
+B2
W1
+
BACKUP BATTERY
GND
W2
FINAL UNIT B/2
X45-373*-**
FAN
TX ANT

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