Kenwood TKR-750 User manual

© 2003-7 PRINTED IN JAPAN
B51-8661-00 (N)1927
VHF FM REPEATER
TKR-750
SUPPLEMENT
SERVICE MANUAL
Knob (VOL)
(K29-5389-03)
Knob (DC source)
(K29-9106-04)
Key top
(K29-5460-02)
Panel assy
(A62-0934-03)
Panel (Outer)
(A62-0840-03)
Modular jack
(E08-0877-05)
This supplement to the Service Manual is available for products with serial number 50500001 or later.
This Service Manual contains a parts list, schematic diagrams and PC boards of a new final unit for the TKR-750.
Since the adjustment procedure is the same as before, refer to the Service Manual (K,E : B51-8556-10 , C : B51-8567-00) for
the TKR-750 for items not provided in this Service Manual.
PARTS LIST .............................................................................................. 2
PC BOARD
FINAL UNIT (X45-3730-XX) ................................................................. 4
SCHEMATIC DIAGRAM........................................................................... 8
EXPLODED VIEW................................................................................... 10
SPECIFICATIONS ................................................................................... 11
CONTENTS

TKR-750
2
PARTS LIST
-G02-0894-04 EARTH SPRING (FINAL FET)
-✽J21-8467-04 HARDWARE FIXTURE (DRIVE FET)
C1,2 CK73GB1H102K CHIP C 1000PF K
C3 C90-2146-05 ELECTRO 100UF 25WV
C7 CK73GB1H102K CHIP C 1000PF K
C9,10 CK73GB1H102K CHIP C 1000PF K
C11 CC73GCH1H470J CHIP C 47PF J
C12 CK73GB1H102K CHIP C 1000PF K
C13 CK73FB1E104K CHIP C 0.10UF K
C14,15 CK73GB1H102K CHIP C 1000PF K
C16 CK73FB1H102K CHIP C 1000PF K
C19 C93-0603-05 CHIP C 1000PF 500WV
C21 C93-0564-05 CHIP C 22PF 500WV
C22 C93-0568-05 CHIP C 47PF 500WV
C27 CK73FB1H102K CHIP C 1000PF K
C28 CK73GB1H102K CHIP C 1000PF K
C29 C93-0603-05 CHIP C 1000PF 500WV
C30 C93-0573-05 CHIP C 120PF 500WV
C31 C93-0565-05 CHIP C 27PF 500WV
C32 C93-0603-05 CHIP C 1000PF 500WV
C35 CK73GB1H102K CHIP C 1000PF K
C37 CK73FB1E474K CHIP C 0.47UF K
C39 CK73GB1H102K CHIP C 1000PF K
C42 CK73FB1H103K CHIP C 0.010UF K
C43,44 CK73GB1H102K CHIP C 1000PF K
C46 C93-0603-05 CHIP C 1000PF 500WV
C47 CM73F2H360J CHIP C 36PF J K2,C2
C49 C93-0564-05 CHIP C 22PF 500WV
C54 CM73F2H102J CHIP C 1000PF J
C55 CK73GB1H103K CHIP C 0.010UF K
C57 C90-2143-05 ELECTRO 47UF 25WV
C64 CK73GB1H102K CHIP C 1000PF K
C68 CK73GB1H102K CHIP C 1000PF K
C69,70 C93-0559-05 CHIP C 9.0PF 500WV
C71,72 C93-0564-05 CHIP C 22PF 500WV
C74 C93-0567-05 CHIP C 39PF 500WV
C77 C93-0565-05 CHIP C 27PF 500WV
C80-87 CK73GB1H102K CHIP C 1000PF K
C90 CK73GB1H102K CHIP C 1000PF K
C91 C92-0777-05 ELECTRO 1000UF 25WV
C92 CM73F2H102J CHIP C 1000PF J
C96 CC73FCH1H180J CHIP C 18PF J
C98 CK73GB1H102K CHIP C 1000PF K
C99 C90-2143-05 ELECTRO 47UF 25WV
C106-109 CK73GB1H102K CHIP C 1000PF K
C110 C92-0628-05 CHIP-TAN 10UF 10WV
C112 C93-0560-05 CHIP C 10PF 500WV
C117 CM73F2H221J CHIP C 220PF J
C118 CK73FB1E474K CHIP C 0.47UF K
C136,137 CK73GB1H102K CHIP C 1000PF K
C140 CC73FCH1H100D CHIP C 10PF D
C142 CC73FCH1H020C CHIP C 2.0PF C
C143 CC73FCH1H330J CHIP C 33PF J
C160 CM73F2H102J CHIP C 1000PF J
C161,162 CM73F2H270J CHIP C 27PF J
C163 C93-0570-05 CHIP C 68PF 500WV
C164 CM73F2H820J CHIP C 82PF J
CN1 E04-0154-05 PIN SOCKET
CN3 E40-5632-05 PIN ASSY
CN4 E40-3246-05 PIN ASSY
CN5 E40-5703-05 PIN ASSY
CN6-8 E23-0462-05 TERMINAL
F1 F53-0217-05 FUSE
CN51,52 J13-0071-05 FUSE HOLDER
L2 L40-4775-34 SMALL FIXED INDUCTOR (47NH)
L3 L40-6875-34 SMALL FIXED INDUCTOR (68NH)
L4,5 L34-4518-05 AIR-CORE COIL
L6 L34-4520-05 AIR-CORE COIL
L7 L34-4523-05 AIR-CORE COIL
L8 L34-4517-05 AIR-CORE COIL K2,C2
L8 L34-4518-05 AIR-CORE COIL K,E,C
L9-11 L34-4520-05 AIR-CORE COIL
L12 L34-4523-05 AIR-CORE COIL
L15 L40-4785-34 SMALL FIXED INDUCTOR (470NH)
R1 RK73FB2A100J CHIP R 10 J 1/10W
R6 RK73GB1J220J CHIP R 22 J 1/16W
R7 RK73GB1J822J CHIP R 8.2K J 1/16W
R8 RK73FB2A100J CHIP R 10 J 1/10W
R9 RK73FB2A560J CHIP R 56 J 1/10W
R10 RK73FB2A151J CHIP R 150 J 1/10W
R11 RK73GB1J472J CHIP R 4.7K J 1/16W
R13 RK73GB1J471J CHIP R 470 J 1/16W
R14 R92-0700-05 CHIP R 180 J 1/2W
R15 R92-0686-05 CHIP R 33 J 1/2W
R16 R92-0700-05 CHIP R 180 J 1/2W
R17 RK73FB2A154J CHIP R 150K J 1/10W
R18 RK73EB2B101J CHIP R 100 J 1/8W K,E,C
R18 RK73EB2B470J CHIP R 47 J 1/8W K2,C2
R19 RK73FB2A104J CHIP R 100K J 1/10W
R20,21 R92-1252-05 CHIP R 0 OHM J 1/16W
R22 R92-1213-05 CHIP R 100 J 1/2W
R23,24 RK73FB2A104J CHIP R 100K J 1/10W
R25 RK73GB1J473J CHIP R 47K J 1/16W
R26 RK73GB1J101J CHIP R 100 J 1/16W
R27 RK73GB1J471J CHIP R 470 J 1/16W
R28 RK73GB1J105J CHIP R 1.0M J 1/16W
R29 RK73GB1J471J CHIP R 470 J 1/16W
R30 RK73GB1J222J CHIP R 2.2K J 1/16W
R31 RK73GB1J102J CHIP R 1.0K J 1/16W
R32 RK73GB1J104J CHIP R 100K J 1/16W
R34 R92-1252-05 CHIP R 0 OHM J 1/16W
R35 RK73GB1J393J CHIP R 39K J 1/16W
R36 R92-1252-05 CHIP R 0 OHM J 1/16W
R37 R92-0670-05 CHIP R 0 OHM
Ref. No. Address Parts No. Description Desti-
nation
New
parts
Ref. No. Address Parts No. Description Desti-
nation
New
parts
TKR-750 (Y54-318X-XX)
FINAL UNIT (X45-3730-XX)
TKR-750
FINAL UNIT (X45-3730-XX) -10 : K,E,C -11 : K2,C2
✽New Parts. indicates safety critical components.
Parts without Parts No. are not supplied.
Les articles non mentionnes dans le Parts No. ne sont pas fournis.
Teile ohne Parts No. werden nicht geliefert.
L: Scandinavia K:USA P:Canada
Y: PX (Far East, Hawaii) T:England E:Europe
Y:AAFES (Europe) X:Australia M:Other Areas
C:China

TKR-750
3
PARTS LIST
R38 RK73GB1J103J CHIP R 10K J 1/16W
R40 RK73FB2A121J CHIP R 120 J 1/10W
R41 R92-1252-05 CHIP R 0 OHM J 1/16W
R43 RK73FB2A101J CHIP R 100 J 1/10W
R45 RK73GB1J102J CHIP R 1.0K J 1/16W
R48 RK73GB1J471J CHIP R 470 J 1/16W
R49 R92-1217-05 CHIP R 0 OHM
R50 RK73EB2B222J CHIP R 2.2K J 1/8W
R52,53 RK73GB1J102J CHIP R 1.0K J 1/16W
R55 RK73GB1J102J CHIP R 1.0K J 1/16W
R56 R92-1317-05 CHIP R 18 J 1W
R57 RK73GB1J224J CHIP R 220K J 1/16W
R58 RK73GB1J104J CHIP R 100K J 1/16W
R59 RK73GB1J393J CHIP R 39K J 1/16W
R60 RK73GB1J154J CHIP R 150K J 1/16W
R61 R92-2687-05 RESISTOR 5.6 J 5W
R62,63 R92-0670-05 CHIP R 0 OHM
R64 R92-1252-05 CHIP R 0 OHM J 1/16W
R69 RK73GB1J222J CHIP R 2.2K J 1/16W
VR1 R12-6429-05 TRIMMING POT. (100K)
K1 S76-0426-05 RELAY
D1 1SS226 DIODE
D2 02DZ6.2(Y) ZENER DIODE
D4,5 HSM88AS DIODE
D6 1SS355 DIODE
D7 ZSA5A27 ZENER DIODE
D8 RB051L-40 DIODE
D9 MINISMDC050-02 VARISTOR
D51,52 DSA3A1 DIODE
IC1 TA75W01FU MOS IC
IC2 TK11050M ANALOG IC
IC3 NJM78L05UA BI-POLAR IC
Q2 2SC3356(R24) TRANSISTOR
Q3 2SC3357 TRANSISTOR
Q4 PD55003S DRIVE FET
Q5 RD70HVF1-01 FINAL FET
Q8 2SC4116(Y) TRANSISTOR
Q9 DTD123EK DIGITAL TRANSISTOR
TH1 PTH9M04BE471TS THERMISTOR
Ref. No. Address Parts No. Description Desti-
nation
New
parts
Ref. No. Address Parts No. Description Desti-
nation
New
parts
FINAL UNIT (X45-3730-XX)

4
JIHGFEDCBA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
C21
C22
C27
C28
C29
C3
C37
C42
C91
C96
C1
C99
C2
C3
1 3B
B
E
C7
C9
D2
F1
K1
L2
L3
L4
L5
L6
CN51
C106
CN52
D51
D52
C112
C118
R10
R11
R13
R14
R15
R16 R17
R18
R19
R20 R21
Q2
R26
C136
C137
Q3
E
C
B
R28
C143
R1
R6
R7
R8
R9
R48
R49
R50
R52
R53
R61
R64
CN1
TX IN
CN4
CN5
CN6 MAIN DC
(RED)
CN7 BACKUP
(ORANGE)
GND
+B2
GND
+B1
CN8 GND
(BLACK)
C10
C11
C12
C13
C14
C15
C16 C19
J72-0910-09 (B/2)
CHARGE
Vg
+
+
FAB 1
2
FAG
+
Q4
GD
V
T
Main DC Back up battery
+B1
GND
+B2
TKR-750 PC BOARD
FINAL UNIT (X45-3730-XX) -10 : K,E,C -11 : K2,C2
Component side view (J72-0910-09)
Ref. No. Address
IC1 8K
Q2 9H
Q3 9F
Q4 6I
Ref. No. Address
Q5 5L
D2 8J
D4 7Q
D5 9Q
Ref. No. Address
D7 3J
D51 7B
D52 8B

5
JKLMNOPQRS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
C31
C32
C42
C46 C47
C49
C54
C55
C57
C64
C68
C69 C70
C71
C72
C74
C77
C92
D4
D5
D7
F1
L7
L8
L9
L10
L11
L12
L15
IC1
C117
C118
R22
R23
R24
R25
R26
R27
R28
R29
R30
C140
R31
C142
R32
R34
R35
R36
R37
R38
R40
R41
R43
R45
VR1
C160
C161
C162
C163
C164
R57
R62
R63
R69
CN3
1 8E
RSW
8T
PC
FAS
PDT
BAT
VYH
J72-0910-09 (B/2)
Vg
VTH
PC
1
45
8
PDT
8T
DET
Q5
GD
+
FWD
TH1
REV
ANT
Component side
Foil side
Layer 1
Layer 2
Layer 3
Layer 4
PC BOARD TKR-750
FINAL UNIT (X45-3730-XX) -10 : K,E,C -11 : K2,C2
Component side view (J72-0910-09)

JKLMNOPQRSIHGFEDCBA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
C21
C22
C27
C28
C29
C31
C32
C37
C42
C46 C47
C49
C54
C55
C57
C64
C68
C69 C70
C71
C72
C74
C77
C91
C92
C96
C1
C99
C2
C3
1 3B
B
E
C7
C9
D2
D4
D5
D7
F1
K1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L15
CN51
C106
CN52
D51
D52
IC1
C112
C117
C118
R10
R11
R13
R14
R15
R16 R17
R18
R19
R20 R21
R22
R23
R24
R25
Q2
R26
C136
R27
C137
Q3
E
C
B
R28
R29
R30
C140
R31
C142
R32
C143
R34
R1
R35
R36
R37
R38
R6
R7
R8
R9
R40
R41
R43
R45
VR1
R48
R49
R50
C160
C161
C162
R52
C163
R53
C164
R57
R61
R62
R63
R64
R69
CN1
TX IN
CN3
1 8E
RSW
8T
PC
FAS
PDT
BAT
VYH
CN4
CN5
CN6 MAIN DC
(RED)
CN7 BACKUP
(ORANGE)
GND
+B2
GND
+B1
CN8 GND
(BLACK)
C10
C11
C12
C13
C14
C15
C16 C19
J72-0910-09 (B/2) J72-0910-09 (B/2)
CHARGE
Vg
Vg
+
+
FAB 1
2
FAG
+
Q4
GD
VTH
PC
1
45
8
PDT
8T
DET
Q5
GD
+
FWD
TH1
REV
ANT
Main DC Back up battery
+B1
GND
+B2
TKR-750 PC BOARD
Component side
Foil side
Layer 1
Layer 2
Layer 3
Layer 4
PC BOARD TKR-750
FINAL UNIT (X45-3730-XX) -10 : K,E,C -11 : K2,C2
Component side view (J72-0910-09)
FINAL UNIT (X45-3730-XX) -10 : K,E,C -11 : K2,C2
Component side view (J72-0910-09)
Ref. No. Address
IC1 8K
Q2 9H
Q3 9F
Q4 6I
Ref. No. Address
Q5 5L
D2 8J
D4 7Q
D5 9Q
Ref. No. Address
D7 3J
D51 7B
D52 8B

6
JIHGFEDCBA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J72-0910-09 (A/2)
C35
C39
C43
C44
C80 C81 C82 C83 C84 C85 C86
IC2
Q8
R58
R59
1
34
6
R60
TKR-750 PC BOARD
FINAL UNIT (X45-3730-XX) -10 : K,E,C -11 : K2,C2
Foil side view (J72-0910-09)
Ref. No. Address
IC2 7J
IC3 9O
Q8 8I
Q9 7O
Ref. No. Address
D1 8L
D6 8O
D8 5O
D9 6O

7
JKLMNOPQRS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J72-0910-09 (B/2)
C44
C87
C90
C98
D1
D6
D8
D9
C107
C108
C109
C110
IC2
IC3
I
G
O
Q9
R55
R56
R58
R59
1
34
6
+
GND
+B2 GND +B1
Main DC
Back up battery
+B1
GND
+B2
Component side
Foil side
Layer 1
Layer 2
Layer 3
Layer 4
PC BOARD TKR-750
FINAL UNIT (X45-3730-XX) -10 : K,E,C -11 : K2,C2
Foil side view (J72-0910-09)

JKLMNOPQRSIHGFEDCBA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J72-0910-09 (B/2)J72-0910-09 (A/2)
C35
C39
C43
C44
C80 C81 C82 C83 C84 C85 C86
C87
C90
C98
D1
D6
D8
D9
C107
C108
C109
C110
IC2
IC3
I
G
O
Q8
Q9
R55
R56
R58
R59
1
34
6
R60
+
GND
+B2 GND +B1
Main DC
Back up battery
+B1
GND
+B2
TKR-750 PC BOARD
Component side
Foil side
Layer 1
Layer 2
Layer 3
Layer 4
PC BOARD TKR-750
FINAL UNIT (X45-3730-XX) -10 : K,E,C -11 : K2,C2
Foil side view (J72-0910-09)
FINAL UNIT (X45-3730-XX) -10 : K,E,C -11 : K2,C2
Foil side view (J72-0910-09)
Ref. No. Address
IC2 7J
IC3 9O
Q8 8I
Q9 7O
Ref. No. Address
D1 8L
D6 8O
D8 5O
D9 6O

8
7
6
5
4
3
2
1
ABCDE
TKR-750 SCHEMATIC DIAGRAM
-t
IC2
TK11050M
1
2
34
5
6
C81 1000p C82 1000p
R15
33
R10
150
CN4
1
2
C43
1000p
R49
0
C110 10u10
R64
0
R25 47k
C86 1000p
2SC4116(Y)
Q8
R59 39k
CN1 C11
47p
R60
150k
R48
470
C19
1000p
R13
470
R56
18
C27
1000p
CN3
1
2
3
4
5
6
7
8
R58 100k
R27
470
C83 1000p
C39
1000p
R18
*
L2
47n
R30
2.2k
R32
100k
C14
1000p
R1 10
C99
47u25
C22 47p
R7
8.2k
C35
1000p
C109 1000p
2SC3357
Q3
C9
1000p
2SC3356
(R24)
Q2
R11
4.7k
R6 22
R17
150k
Q9
DTD123EK
R8 10
2
COM
3IN 1
OUT
C12
1000p
R9 56
C16
1000p
C21
22p
C85 1000p
C2
1000p
C1
1000p
C10
1000p
C84 1000p
C96
18p
C80 1000p
C143
33p
R14 180 R16 180
L4
22n
L5
22n
TH1
FINAL UNIT
(X45-3730-XX)(A/2)
X45-3730-XX
K,E,C
SURGE
ABSORPTION
VTH
-11
-10
VOLTAGE
REGULATOR
THERMOSTAT
Q2,3
RF AMP
FAG
THERMAL
SENSE
8T
B
PC
K2,C2
FAS
PDT
D6
BAT
DC SWITCH
E
RSW
DC SWITCH
146-174MHz
136-150MHz
TX-RX UNIT
(X57-6260-XX)
(A/2)-CN19
TX-RX UNIT
(X57-6260-XX)
(A/2)-CN16
D1
1SS226
COMPin
GND
COMPoutVcc
Vcont
Vref
L8
22n
15n
C47
NO
36p
R18
100
47
C108 C107
D6 C3
1000p 1000p 1SS355 100u25
IC3
NJM78L05UA
L3
68n
C15
1000p
R50
2.2k
C13
0.1u
C7
1000p
C137
1000p
R53
1k
C136
1000p
R52
1k
C98
1000p
T:13.02V
R:13.65V
350mW
T:0.73V
R:0V
T:1.15V
R:0V
T:7.84V
R:0V
T:8.04V
R:0V
X45-3730-XX (1/2)

9
7
6
5
4
3
2
1
JIHGF
SCHEMATIC DIAGRAM TKR-750
110n
IC1
TA75W01FU
1
2
3
45
6
7
8
C54
1000p
R41
0
R43
100
D2
02DZ6.2(Y)
L8
*
R21
0
R62
0
L7
R20
0
C68
1000p
C87
1000p
C106
1000p
0.47u
39p
R57
220k
D4
HSM88AS
R63
0
R31 1k
C92
1000p
CN52
D51
DSA3A1
R40
120
C140
10p
D9
MINISMDC050-02
R36
0
L9
47n
D7
ZSA5A27
C64
1000p
C42
0.01u
C161
27p
1000p
C49
22p
L15
470n
R45
1k
VR1
100k
CN7
R29
470
R26 100
27p
L10
47n
C142
2p
C28
1000p
R23
100k
C91
1000u25
C163
68p
F1
3.0A
D8
RB051L-40
R38
10k
CN6
C90
1000p
L6
47n
D52
DSA3A1
C44
1000p
C30
120p
CN8
L11
47n
0.47u
D5
HSM88AS
22p
R19
100k
R55
1k
C46 1000p
R35
39k
C57 47u25
9p
C55 0.01u
CN51
ANT
R28
1M
22p
R34
0
R37
0
R61
5.6
C47
*
C164
82p
9p
C160
1000p
R69
2.2k
CN5
1
E
2
B
3
B
K1
+B1
SURGE
PROTECTOR +B2
CURRENT
PROTECTOR
GND
BACK UP
BATTERY
REVERSE
CURRENT
PROTECTION
D51,52
PROTECT OF REVERSE
CONNECTION
DC AMP
D2
VOLTAGE
REFERENCE
Q5
+B1W3
W5
D4,5
GND
RF DETECTOR
MAIN DC
CHARGE
GND
MAIN DC
W4
GND
FINAL AMP
(X45-3730-XX)(B/2)
+B2
BACKUP
TX
DRIVE
AMP
TX-RX UNIT
(X57-6260-XX)
(A/2)-CN15
OUT1
IN1-
IN1+
VEEIN2+
IN2-
OUT-B
VCC
C37 C29
C118
C112
10p
R22
100
C31
27p
RD70HVF1-01
Q5
PD55003S
Q4
R24
100k
C32
1000p
C117
220p
C162
27p
L12
C74 C77 C71 C69 C72 C70
T:13.03V
R:13.56V
T:5.18V
R:0V
X45-3730-XX (2/2)
Note : The components marked with a dot (•) are parts of layer 1.

-t
IC2
TK11050M
1
2
34
5
6
110n
C81 1000p C82 1000p
IC1
TA75W01FU
1
2
3
45
6
7
8
C54
1000p
R15
33
R41
0
R10
150
CN4
1
2
R43
100
D2
02DZ6.2(Y)
L8
*
C43
1000p
R49
0
R21
0
C110 10u10
R62
0
R64
0
R25 47k
L7
C86 1000p
R20
0
C68
1000p
2SC4116(Y)
Q8
C87
1000p
C106
1000p
R59 39k
0.47u
39p
R57
220k
D4
HSM88AS
R63
0
R31 1k
CN1 C92
1000p
CN52
C11
47p
R60
150k
R48
470
C19
1000p
R13
470
D51
DSA3A1
R56
18
R40
120
C140
10p
D9
MINISMDC050-02
C27
1000p
CN3
1
2
3
4
5
6
7
8
R58 100k
R36
0
L9
47n
D7
ZSA5A27
C64
1000p
R27
470
C83 1000p
C42
0.01u
C39
1000p
C161
27p
1000p
R18
*
C49
22p
L15
470n
L2
47n
R45
1k
R30
2.2k
R32
100k
C14
1000p
R1 10
VR1
100k
CN7
C99
47u25
R29
470
R26 100
C22 47p
R7
8.2k
27p
L10
47n
C35
1000p
C142
2p
C28
1000p
C109 1000p
R23
100k
C91
1000u25
2SC3357
Q3
C9
1000p
C163
68p
F1
3.0A
2SC3356
(R24)
Q2
D8
RB051L-40
R11
4.7k
R38
10k
R6 22
CN6
C90
1000p
L6
47n
R17
150k
D52
DSA3A1
C44
1000p
Q9
DTD123EK
R8 10
C30
120p
CN8
2
COM
3IN 1
OUT
L11
47n
0.47u
C12
1000p
R9 56
C16
1000p
C21
22p
D5
HSM88AS
22p
R19
100k
C85 1000p
R55
1k
C46 1000p
R35
39k
C57 47u25
9p
C55 0.01u
C2
1000p
CN51
ANT
C1
1000p
R28
1M
22p
R34
0
C10
1000p
R37
0
C84 1000p
R61
5.6
C96
18p
C80 1000p
C143
33p
R14 180 R16 180
L4
22n
L5
22n
C47
*C164
82p
9p
C160
1000p
R69
2.2k
TH1
CN5
1
E
2
B
3
B
K1
FINAL UNIT
(X45-3730-XX)(A/2)
X45-3730-XX
K,E,C
SURGE
ABSORPTION
+B1
SURGE
PROTECTOR
VTH
+B2
-11
CURRENT
PROTECTOR
GND
-10
BACK UP
BATTERY
REVERSE
CURRENT
PROTECTION
D51,52
PROTECT OF REVERSE
CONNECTION
VOLTAGE
REGULATOR
THERMOSTAT
DC AMP
Q2,3
RF AMP
FAG
THERMAL
SENSE
8T
B
PC
D2
VOLTAGE
REFERENCE
Q5
+B1W3
W5
K2,C2
D4,5
GND
FAS
RF DETECTOR
PDT
D6
MAIN DC
CHARGE
GND
MAIN DC
BAT
W4
GND
FINAL AMP
(X45-3730-XX)(B/2)
+B2
BACKUP
DC SWITCH
E
RSW
DC SWITCH
146-174MHz
136-150MHz
TX-RX UNIT
(X57-6260-XX)
(A/2)-CN19
TX-RX UNIT
(X57-6260-XX)
(A/2)-CN16
D1
1SS226
COMPin
GND
COMPoutVcc
Vcont
Vref
L8
22n
15n
C47
NO
36p
R18
100
47
TX
DRIVE
AMP
TX-RX UNIT
(X57-6260-XX)
(A/2)-CN15
OUT1
IN1-
IN1+
VEEIN2+
IN2-
OUT-B
VCC
C37 C29
C118
C112
10p
R22
100
C31
27p
RD70HVF1-01
Q5
PD55003S
Q4
R24
100k
C32
1000p
C117
220p
C162
27p
L12
C74 C77 C71 C69 C72 C70
C108 C107
D6 C3
1000p 1000p 1SS355 100u25
IC3
NJM78L05UA
L3
68n
C15
1000p
R50
2.2k
C13
0.1u
C7
1000p
C137
1000p
R53
1k
C136
1000p
R52
1k
C98
1000p
T:13.02V
R:13.65V
T:13.03V
R:13.56V
T:5.18V
R:0V
350mW
T:0.73V
R:0V
T:1.15V
R:0V
T:7.84V
R:0V
T:8.04V
R:0V

TKR-750
10
3
2
1
BA
27
1
Ox2
Qx11
Ex3
Ex3
26
28
20
21
30
Nx3
Final
(A/2)
Final
(B/2)
E M4 x 14 : N30-4014-46
N M3 x 8 : N67-3008-46
O M2.6 x 6 (Br-Tap) : N87-2606-46
Q M3 x 6 (Br-Tap) : N87-3006-46
Earth spring
(G02-0894-04)
Hardware fixture
(J21-8467-04)
EXPLODED VIEW
Parts with the exploded numbers larger than 700 are not supplied.

TKR-750
11
SPECIFICATIONS (K,K2,C,C2 TYPE)
GENERAL
Frequency Range ................................ K,C : 146 to 174MHz K2,C2 : 136 to 150MHz
Number of Channels ........................... 16 channel
Channel Spacing ................................. K,K2 : Wide : 30kHz, 25kHz Narrow : 15kHz, 12.5kHz
(PLL channel stepping 2.5kHz/5kHz/6.25kHz/7.5kHz)
C,C2 : Wide : 25kHz Narrow : 12.5kHz
(PLL channel stepping 5kHz/6.25kHz)
Operating Voltage ............................... 13.6V DC±15%
Current Drain
Standby .......................................... 0.8A
Standby w/power save .................. 0.3A (Operating mode DC-IN : Backup, FAN : Temp, SAVE : ON, DISP : OFF)
Receive .......................................... 1.2A
Transmit/Receive ........................... Less than 13A
Duty Cycle
Receive .......................................... 100%
Transmit ......................................... 100% (100% @25W)
Frequency Stability ............................. Less than ±0.0002% –30°C to +60°C (–22°F to +140°F)
Antenna Impedance ........................... 50Ω
Operating Temperature Range ........... –30°C to +60°C (–22°F to +140°F)
Dimensions ......................................... 483 (19) W x 88 (3-1/2) H x 340 (13-1/3) D mm (inch)
Weight ................................................ 9.7kg (21.4 lbs.)
RECEIVER (Measured by TIA/EIA-603)
Sensitivity
12dB SINAD ................................... 0.35µV
20dB Quieting ................................ 0.45µV
Selectivity ........................................... K,K2 : Wide : 85dB (±30kHz) Narrow : 80dB (15kHz), 77dB (12.5kHz)
C,C2 : Wide : 85dB (±25kHz) Narrow : 77dB (12.5kHz)
Intermodulation................................... K,K2 : Wide : 80dB (±30kHz/±60kHz) Narrow : 75dB (±15kHz/±30kHz)
C,C2 : Wide : 80dB (±25kHz/±50kHz) Narrow : 75dB (±12.5kHz/±25kHz)
Hum and Noise ................................... Wide : 50dB Narrow : 45dB
Spurious & Image Rejection ............... 90dB
Audio Output (Ext. Speaker) ............... 4W at 4Ωless than 5% distortion
Audio Distortion (Ext. Speaker) .......... Less than 2.5% at 1000Hz
Band Spread ....................................... 3MHz
TRANSMITTER (Measured by TIA/EIA-603)
RF Power Output ................................ 50W adjustable to 25W (100% duty @25W)
Type of Emission ................................ K,K2 : Wide : 16K0F3E Narrow : 11K0F3E
....................................................... C,C2 : Wide : 16K0F3E Narrow : 8K50F3E
Spurious Response ............................. 80dB
FM Hum and Noise ............................ Wide : 50dB Narrow : 45dB
Audio Distortion .................................. Less than 3% at 1000Hz
Microphone Impedance ...................... 600Ω
Band Spread ....................................... K,C : 28MHz K2,C2 : 14MHz

KENWOOD CORPORATION
2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525 Japan
KENWOOD U.S.A. CORPORATION
P. O. BOX 22745, 2201 East Dominguez Street, Long Beach, CA 90801-5745, U.S.A.
KENWOOD ELECTRONICS CANADA INC.
6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8
KENWOOD ELECTRONICS DEUTSCHLAND GMBH
Rembrücker Str. 15, 63150 Heusenstamm, Germany
KENWOOD ELECTRONICS BELGIUM N.V.
Leuvensesteenweg 248 J, 1800 Vilvoorde, Belgium
KENWOOD ELECTRONICS FRANCE S.A.
13, Boulevard Ney, 75018 Paris, France
KENWOOD ELECTRONICS U.K. LIMITED
KENWOOD House, Dwight Road, Watford, Herts., WD18 9EB United Kingdom
KENWOOD ELECTRONICS EUROPE B.V.
Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands
KENWOOD ELECTRONICS ITALIA S.p.A.
Via G. Sirtori, 7/9 20129 Milano, Italy
KENWOOD IBERICA S.A.
Bolivia, 239-08020 Barcelona, Spain
KENWOOD ELECTRONICS AUSTRALIA PTY. LTD.
(A.C.N. 001 499 074)
16 Giffnock Avenue, Centrecourt Estate, North Ryde, N.S.W. 2113 Australia
KENWOOD ELECTRONICS (HONG KONG) LTD.
Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Kwai Fong, N.T., Hong Kong
KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD.
Sales Marketing Division
1 Ang Mo Kio Street 63, Singapore 569110
TKR-750
SPECIFICATIONS (E TYPE)
GENERAL
Frequency Range ........................................ 146 to 174MHz
Number of Channels ................................... 16 channel
Channel Spacing ......................................... Wide : 25kHz Narrow : 12.5kHz (PLL channel stepping 5kHz/6.25kHz)
Operating Voltage ....................................... 13.2V DC
Current Drain
Standby ................................................... 0.8A
Standby w/power save ............................ 0.3A (Operating mode DC-IN : Backup, FAN : Temp, SAVE : ON, DISP : OFF)
Receive ................................................... 1.2A
Transmit/Receive .................................... Less than 13A
Duty Cycle ................................................... Receive : 100% Transmit : 100% (100% @25W)
Frequency Stability ...................................... Less than ±0.0002% –30°C to +60°C
Antenna Impedance .................................... 50Ω
Operating Temperature Range ................... –30°C to +60°C
Dimensions ................................................. 483 W x 88 H x 340 D mm
Weight ........................................................ 9.7kg
RECEIVER (Measured by EN 300 086)
Sensitivity .................................................... 0.45µV
Adjucent Channel Selectivity ...................... 85dB (±25kHz) 77dB (±12.5kHz)
Intermodulation ........................................... 72dB
Spurious & Image Rejection ....................... 90dB
Audio Output (Ext. Speaker) ....................... 4W at 4Ωless than 5% distortion
Audio Distortion (Ext. Speaker) ................... Less than 2.5% at 1000Hz
Band Spread ................................................ 3MHz
TRANSMITTER (Measured by EN 300 086)
RF Power Output ........................................ 50W adjustable to 25W (100% duty @25W)
Modulation Limiting .................................... ±5kHz at ±25kHz ±2.5kHz at ±12.5kHz
Spurious Emission ...................................... –36dBm ≤1GHz –30dBm > 1GHz
FM Noise (EIA) ............................................ 25kHz : 50dB 12.5kHz : 45dB
Modulation Distortion ................................. Less than 3% at 1000Hz
Microphone Impedance .............................. 600Ω
Band Spread ................................................ 28MHz