Kenwood TKR-751 Operating manual

Document Copyrights
Copyright 2006 by Kenwood Corporation. All rights reserved.
No part of this manual may be reproduced, translated, distributed, or transmitted in any
form or by any means, electronic, mechanical, photocopying, recording, or otherwise, for
any purpose without the prior written permission of Kenwood.
Disclaimer
While every precaution has been taken in the preparation of this manual, Kenwood
assumes no responsibility for errors or omissions. Neither is any liability assumed for
damages resulting from the use of the information contained herein. Kenwood reserves
the right to make changes to any products herein at any time for improvement purposes.

© 2004-10 PRINTED IN JAPAN
B51-8700-00 (N)935
VHF FM REPEATER
TKR-751
SERVICE MANUAL
VHF FM REPEATER TKR-751
Front panel
(A62-0934-03)
Knob (DC source)
(K29-9106-04)
Key top
(K29-5460-02)
Knob (Volume)
(K29-5389-03)
Modular jack
(E08-0877-05)
Antenna cable (N)
(E30-3419-05)
Antenna cable (BNC)
(E30-3418-05)
TEST/SPKR connector assy
(E37-0913-05)
D-sub cable assy
(E37-0904-05)
DC backup terminal
(E70-0402-05)
DC cord (Ext DC in)
(E30-3414-05)
Fuse (Blade, 10A/32V)
(F06-1032-05) x 2
MODIFICATION........................................................................................ 2
PARTS LIST .............................................................................................. 3
EXPLODED VIEW...................................................................................... 5
PC BOARD
FINAL UNIT (X45-3732-71) .................................................................. 6
SCHEMATIC DIAGRAM......................................................................... 10
CONTENTS
SUPPLEMENT
This supplement to the service manual is available for products with serial number 60700001 or later.
This service manual contains a parts list, schematic diagrams and PC board of a new final unit for the TKR-751.
Since the adjustment procedure is the same as before, refer to the service manual (B51-8683-00) the TKR-751 for items not
provided in this service manual.

TKR-751
2
MODIFICATION
3. Single Antenna
The TKR-751 can be used as a base station by sharing an
external antenna connector for both transmitting and receiv-
ing data.
3-1. Modification
1. Change the installation position of C92 and C160 of the
final unit using a soldering iron.
Fig. 3
2. Short-circuit the printed pattern of ANT SW near the CN3
connector by soldering.
3. Disconnect the pin connector from CN18 of the TX-RX
unit.
Remove the two screws used for securing the BNC con-
nector on the back panel of the unit. Detach the antenna
cable assy. (E30-3418-05)
4. Cut off the coaxial cable of the removed antenna cable
assy on the BNC connector side.
Strip off the insulation of the cut-off coaxial cable to pre-
pare it to be soldered.
Strip off the insulation so that
the cable can be soldered.
Cut off the coaxial cable
at this point.
About 20mm
About
8~10mm
Fig. 4
3-2. Connection
1. Solder the prepared coaxial cable to the final unit.
2. Connect the pin connector of the coaxial cable to CN18 of
the TX-RX unit.
3-3. Setting the FPU
Set the channel to be used as “Simplex” using the FPU.
Fig. 5
C92
CN3 ANT SW
FWD
REV
C160
C160
C92
RX
ECN53
Final unit (A/2)
Component side
CN16
CN18
TX-RX unit (A/2)
Component side
Route the coaxial
cable under the lead
wire extending from
CN3 and CN16.
Style the coaxial cable as
illustrated in the figure.
Solder the coaxial
cable.
CN3 ERX
Final unit (A/2)
Component side

TKR-751
3
PARTS LIST
Ref. No. Address Parts No. Description Desti-
nation
New
parts
Ref. No. Address Parts No. Description Desti-
nation
New
parts
TKR-751 (Y54-322X-XX)
FINAL UNIT (X45-3732-71)
✽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
51 1B G02-0894-04 EARTH SPRING (FINAL FET)
64 1B J21-8467-04 MOUNTING HARDWARE (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 K
C21 C93-0564-05 CHIP C 22PF J
C22 C93-0568-05 CHIP C 47PF J
C27 CK73FB1H102K CHIP C 1000PF K
C28 CK73GB1H102K CHIP C 1000PF K
C29 C93-0603-05 CHIP C 1000PF K
C30 C93-0573-05 CHIP C 120PF J
C31 C93-0569-05 CHIP C 56PF J
C32 C93-0603-05 CHIP C 1000PF K
C35 CK73GB1H102K CHIP C 1000PF K
C37 CK73FB1E474K CHIP C 0.47UF K
C39 CK73GB1H102K CHIP C 1000PF K
C42 CK73FB1H223K CHIP C 0.022UF K
C43,44 CK73GB1H102K CHIP C 1000PF K
C46 C93-0603-05 CHIP C 1000PF K
C49 C93-0564-05 CHIP C 22PF J
C53 CK73FB1H473K CHIP C 0.047UF K
C54 CM73F2H102J CHIP C 1000PF J
C55 CK73GB1H103K CHIP C 0.010UF K
C57 C90-2143-05 ELECTRO 47UF 25WV
C60 CK73GB1H102K CHIP C 1000PF K
C64 CK73GB1H102K CHIP C 1000PF K
C68 CK73GB1H102K CHIP C 1000PF K
C69,70 C93-0559-05 CHIP C 9.0PF D
C71 C93-0563-05 CHIP C 18PF J
C72 C93-0564-05 CHIP C 22PF J
C75 C93-0566-05 CHIP C 33PF J
C77 C93-0564-05 CHIP C 22PF J
C80-87 CK73GB1H102K CHIP C 1000PF K
C89 CC73GCH1H101J CHIP C 100PF J
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 C90-4016-05 ELECTRO 47UF 16WV
C103 CC73GCH1H101J CHIP C 100PF J
C105 CC73GCH1H101J CHIP C 100PF J
TKR-751 C106-109 CK73GB1H102K CHIP C 1000PF K
C110 C92-0628-05 CHIP-TAN 10UF 10WV
C112 C93-0560-05 CHIP C 10PF D
C117 CM73F2H221J CHIP C 220PF J
C118 CK73FB1E474K CHIP C 0.47UF K
C136,137 CK73GB1H102K CHIP C 1000PF K
C143 CC73FCH1H330J CHIP C 33PF J
C145 CC73GCH1H220J CHIP C 22PF J
C146 CC73GCH1H101J CHIP C 100PF J
C160 CM73F2H102J CHIP C 1000PF J
C161,162 CM73F2H270J CHIP C 27PF J
C163 C93-0569-05 CHIP C 56PF J
C164 CM73F2H820J CHIP C 82PF J
C165 CK73FB1H102K CHIP C 1000PF K
C166 CC73GCH1H220J CHIP C 22PF J
C167 CC73GCH1H101J CHIP C 100PF J
C168-171 CC73GCH1H220J CHIP C 22PF J
C172 CC73GCH1H101J CHIP C 100PF J
C173 C93-0563-05 CHIP C 18PF J
C174 CC73FCH1H270J CHIP C 27PF 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 L34-4518-05 AIR-CORE COIL
L9-11 L34-4520-05 AIR-CORE COIL
L12 L34-4523-05 AIR-CORE COIL
L16 L40-1575-92 SMALL FIXED INDUCTOR (15NH)
L17 L40-1875-92 SMALL FIXED INDUCTOR (18NH)
L19 L34-4667-05 AIR-CORE COIL
L20 L34-4744-05 AIR-CORE COIL
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 R92-1253-05 CHIP R 82 J 1/2W
R15 R92-1213-05 CHIP R 100 J 1/2W
R16 R92-1253-05 CHIP R 82 J 1/2W
R17 RK73FB2A154J CHIP R 150K J 1/10W
R18 RK73EB2B101J CHIP R 100 J 1/8W
R19 RK73FB2A104J CHIP R 100K J 1/10W
R20,21 R92-1252-05 CHIP R 0 OHM J 1/16W
FINAL UNIT (X45-3732-71)

TKR-751
4
PARTS LIST
Ref. No. Address Parts No. Description Desti-
nation
New
parts
Ref. No. Address Parts No. Description Desti-
nation
New
parts
R22 R92-2559-05 CHIP R 12 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 RK73GB1J474J CHIP R 470K J 1/16W
R29 R92-1252-05 CHIP R 0 OHM J 1/16W
R30 RK73GB1J683J CHIP R 68K J 1/16W
R31 RK73GB1J103J CHIP R 10K J 1/16W
R32 RK73GB1J104J CHIP R 100K J 1/16W
R34 R92-1252-05 CHIP R 0 OHM J 1/16W
R35 RK73GB1J104J CHIP R 100K J 1/16W
R36 R92-1252-05 CHIP R 0 OHM J 1/16W
R38 RK73GB1J333J CHIP R 33K J 1/16W
R40 R92-1204-05 CHIP R 100 J 1/4W
R41 R92-1252-05 CHIP R 0 OHM J 1/16W
R45 RK73GB1J101J CHIP R 100 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
R60 R92-1252-05 CHIP R 0 OHM J 1/16W
R61 R92-2687-05 RESISTOR 5.6 J 5.0W
R62,63 R92-0670-05 CHIP R 0 OHM
R64 R92-1252-05 CHIP R 0 OHM J 1/16W
R70 R92-1205-05 CHIP R 120 J 1/4W
R71 R92-0670-05 CHIP R 0 OHM
R72 R92-1214-05 CHIP R 120 J 1/2W
R73 R92-1252-05 CHIP R 0 OHM J 1/16W
VR1 R12-6427-05 TRIMMING POT. (47K)
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
D53 MA4PH633 DIODE
D55,56 XB15A709 DIODE
IC1 TA75W01FU MOS-IC
IC2 MAX6502UKP035 ANALOGUE 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
FINAL UNIT (X45-3732-71)

TKR-751
5
EXPLODED VIEW
3
2
1
BA
29
64
51
20 19
27
25
26
1
Dx3
Nx2
Px11
L
Lx2
Dx3
Final
(B/2)
Final
(A/2)
D M4 x 14 : N30-4014-46
L M3 x 8 : N67-3008-46
N M2.6 x 6 (Br-Tap) : N87-2606-46
P M3 x 6 (Br-Tap) : N87-3006-46
Parts with the exploded numbers larger than 700 are not supplied.

6
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
J72-0970-19 (B/2)
CHARGE
Vg
+
+
FAB 1
2
FAG
+
Q4
GD
T
M
C30
Main DC Back up battery
+B1
GND
+B2
TKR-751 PC BOARD
FINAL UNIT (X45-3732-71) Component side view (J72-0970-19)
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
D53 8R

7
JKLMNOPQRS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
C31
C32
C42
C53
C46
C49
C54
C55
C57
C64
L16
C68
C69 C70
C71
C72
C75
C77
C92
D4
D5
D7
F1
L7
L8
L9
L10
L11
L12
R71
IC1
C117
C118
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
R32
R34
R35
R36
C165
R38
L17
R40
R41
R70
R45
VR1
C161
C162
C163
C164
R57
R62
R63
CN3 ANT SW
1 8GND
NC
8T
PC
FAS
PDT
BUP
TMP
J72-0970-19 (A/2)
Vg
TMP
C30
PC
1
45
8
PDT
8T
DET
Q5
GD
+
FWD
TH1
REV
ANT
C160
L20
C173
L19
RX
E
D53
CN53
PC BOARD TKR-751
FINAL UNIT (X45-3732-71) Component side view (J72-0970-19)
Component side
Foil side
Layer 1
Layer 2
Layer 3
Layer 4

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
C53
C46
C49
C54
C55
C57
C64
L16
C68
C69 C70
C71
C72
C75
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
R71
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
R31
R32
C143
R34
R1
R35
R36
C165
R38
L17
R6
R7
R8
R9
R40
R41
R70
R45
VR1
R48
R49
R50
C161
C162
R52
C163
R53
C164
R57
R61
R62
R63
R64
CN1
TX IN
CN3 ANT SW
1 8GND
NC
8T
PC
FAS
PDT
BUP
TMP
CN4
CN5
CN6 MAIN DC
(RED)
CN7 BACKUP
(ORANGE)
GND
+B2
GND
+B1
CN8 GND
(BLACK)
C10
C11
C12
C13
C14
C15
C16 C19
J72-0970-19 (B/2)
J72-0970-19 (A/2)
CHARGE
Vg
Vg
+
+
FAB 1
2
FAG
+
Q4
GD
TMP
C30
PC
1
45
8
PDT
8T
DET
Q5
GD
+
FWD
TH1
REV
ANT
Main DC Back up battery
+B1
GND
+B2
C160
L20
C173
L19
RX
E
D53
CN53
TKR-751 PC BOARD PC BOARD TKR-751
FINAL UNIT (X45-3732-71) Component side view (J72-0970-19) FINAL UNIT (X45-3732-71) Component side view (J72-0970-19)
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
D53 8R
Component side
Foil side
Layer 1
Layer 2
Layer 3
Layer 4

8
JIHGFEDCBA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J72-0970-19 (A/2)
C35
C39
C43
C44
C80 C81 C82 C83 C84 C85 C86
IC2
Q8
1
34
5
D56
C174
D55
R73
C60
C155
R72
C145
C146
C171 C172
R60
C167
TKR-751 PC BOARD
FINAL UNIT (X45-3732-71) Foil side view (J72-0970-19)
Ref. No. Address
IC2 7J
IC3 9O
Q8 8I
Q9 7O
Ref. No. Address
D1 8L
D6 8O
D8 5O
D9 6O
Ref. No. Address
D55 7A
D56 6B

9
JKLMNOPQRS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J72-0970-19 (B/2)
C44
C87
C90
C98
D1
D6
D8
D9
C107
C108
C109
C110
IC2
IC3
I
G
O
Q9
R55
R56
1
34
5
+
GND
+B2 GND +B1
Main DC
Back up battery
+B1
GND
+B2
R60
C166 C167
C89
C170
C103
C168
C105
C169
PC BOARD TKR-751
FINAL UNIT (X45-3732-71) Foil side view (J72-0970-19)
Component side
Foil side
Layer 1
Layer 2
Layer 3
Layer 4

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
J72-0970-19 (B/2)
J72-0970-19 (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
1
34
5
+
GND
+B2 GND +B1
Main DC
Back up battery
+B1
GND
+B2
D56
C174
D55
R73
C60
C155
R72
C145
C146
C171 C172
R60
C166 C167
C89
C170
C103
C168
C105
C169
TKR-751 PC BOARD PC BOARD TKR-751
FINAL UNIT (X45-3732-71) Foil side view (J72-0970-19) FINAL UNIT (X45-3732-71) Foil side view (J72-0970-19)
Ref. No. Address
IC2 7J
IC3 9O
Q8 8I
Q9 7O
Ref. No. Address
D1 8L
D6 8O
D8 5O
D9 6O
Ref. No. Address
D55 7A
D56 6B
Component side
Foil side
Layer 1
Layer 2
Layer 3
Layer 4

TKR-751 SCHEMATIC DIAGRAM
10
7
6
5
4
3
2
1
ABCDE
X45-373 1/2
C81 1000p C82 1000p
R15
100
R10
150
CN4
1
2
C108 1000p C13
0.1u
C43
1000p
R49
0
C110 10u10 C136
1000p
R64
0
R25 47k
C86 1000p
C107 1000p
D6 1SS355
C3 100u25
CN1
C137
1000p
C11
47p
R48
470
C19
1000p
R13
470
R56
18
C27
1000p
CN3
1
2
3
4
5
6
7
8
R27
470
C83 1000p
C39
1000p
R18
100
L2
47n
R30
68k
C14
1000p
R1 10
C99
47u16
C22
47p
L3
68n
C7
1000p
R7
8.2k
C35
1000p
C109 1000p
D1
1SS226
2SC3357
Q3
C15
1000p
C9
1000p
2SC3356
(R24)
Q2
R11
4.7k
R50
2.2k
R6 22
R17
150k
R8 10
2
COM
3IN 1
OUT
C12
1000p
R9 56
C98
1000p
R53
1k
C16
1000p
C21
22p
C85 1000p
C2
1000p
C1
1000p
C10
1000p
C84 1000p R52
1k
C96
18p
C80 1000p
C143
33p
R14 180 R16
82
L4
22n
L5
22n
1
GND1
2
GND2
3
HYST
4VCC
5
ToVER
R60
0
R32
100k
C53
0.047u
FINAL UNIT (X45-3732-71) (A/2)
THERMOSTAT
THERMAL
SENSE
DC SWITCH
DC SWITCH
TX-RX UNIT
(X57-6952-70)
(A/2)-CN16
TX-RX UNIT
(X57-6952-70)
(A/2)-CN19
Q2,3
RF AMP
2SC4116(Y)
Q8
IC2
MAX6502UKP035
IC3
NJM78L05UA
VOLTAGE
REGULATOR
Q9
DTD123EK
FAG
FAB
SURGE
ABSORPTION
D6
TMP
8T
PC
FAS
PDT
BUP
GND
NC
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

SCHEMATIC DIAGRAM TKR-751
11
7
6
5
4
3
2
1
JIHGF
X45-373 2/2
Note : The components marked with a dot (•) are parts of layer 1.
L12 110n
1
2
3
45 IN2+
6IN2-
7OUT-B
8VCC
C54
1000p
R41
0
L8
22n
R21
0
R62
0
L7
R20
0
C68
1000p
C106
1000p
0.47u
R57
220k D4
HSM88AS
R63
0
R31 10k
C92
1000p
CN52
D51
DSA3A1
R40
100
L9
47n
D7
ZSA5A27
0.022u
C161
27p
1000p
C49
22p
R45
100k
VR1 47k
CN7
R29
0
R26
C117
220p
C77 27p
L10
47n
C28
1000p
R23
100k
C163
56p
F1
3.0A
D8
RB051L-40
CN6
L6
47n
R22
12
D52
DSA3A1
C44
1000p
C30
120p
R24
100k
CN8
L11
47n
0.47u
D5
HSM88AS
C71 22p
R19
100k
R55
1k
C46 1000p
R35
100k
C57 47u25
C69 9p
C55 0.01u
C32
1000p
CN51
R28
470k
C72 22p
R34
0
R61
5.6
C162
27p
C31
56p
C164
82p
C70 9p
CN5
1
E
2
B
3
B
C165
1000p
L16
15n
R70
120
R71
0
L17
18n
C166 22p
C167 100p
C146 100p
C145 22p
C160
1000p
L19
9.5T
D53
MA4PH633
L20
5T
C60
1000p
C173
18p
R73
0
C174 27p
R72 120
C155 1000p
C172
100p
C171
22p
C103
100p
C168
22p
C169
22p
C105
100p
K1
C75 33p
+B1
SURGE
PROTECTOR +B2
CURRENT
PROTECTOR
GND
BACK UP
BATTERY
REVERSE
CURRENT
PROTECTION
DC AMP
TX
DRIVE
AMP
Q5
+B1
W3
W5
GND
CHARGE
MAIN DC
W4
GND
FINAL AMP
(X45-3732-71) (B/2)
+B2
ANT SW
TX ANT
RX
D8
TX-RX UNIT
(X57-6952-70)
(A/2)-CN15
OUT1
IN1-
IN1+
VEE
IC1
TA75W01FU
D4,5
RF DETECTOR
D55,56
RF SWITCH
RF SWITCH
D2
VOLTAGE
REFERENCE
PD55003S
Q4
RD70HVF1-01
Q5
C112
10p
C42
100
D2
02DZ6.2(Y)
R36
0
C64
1000p
R38
33k
D56
XB15A709
D55
XB15A709
MAIN DC
GND
BACKUP
D9
MINISMDC050-02
C87
1000p
C91
1000u25
C90
1000p
C89
100p
C170
22p
D51,52
PROTECT OF REVERSE
CONNECTION
C37 C29
C118
T:13.03V
R:13.56V
T:5.18V
R:0V
FINAL UNIT (X45-3732-71) (A/2)

L12 110n
C81 1000p C82 1000p
1
2
3
45 IN2+
6IN2-
7OUT-B
8VCC
C54
1000p
R15
100
R41
0
R10
150
CN4
1
2
C108 1000p C13
0.1u
L8
22n
C43
1000p
R49
0
R21
0
C110 10u10
R62
0
C136
1000p
R64
0
R25 47k
L7
C86 1000p
R20
0
C68
1000p
C107 1000p
C106
1000p
D6 1SS355
0.47u
R57
220k D4
HSM88AS
R63
0
C3 100u25
R31 10k
CN1 C92
1000p
CN52
C137
1000p
C11
47p
R48
470
C19
1000p
R13
470
D51
DSA3A1
R56
18
R40
100
C27
1000p
CN3
1
2
3
4
5
6
7
8
L9
47n
D7
ZSA5A27
R27
470
C83 1000p
0.022u
C39
1000p
C161
27p
1000p
R18
100
C49
22p
L2
47n
R45
100k
R30
68k
C14
1000p
R1 10
VR1 47k
CN7
C99
47u16
R29
0
R26
C117
220p
C22
47p
L3
68n
C7
1000p
R7
8.2k
C77 27p
L10
47n
C35
1000p
C28
1000p
C109 1000p
D1
1SS226
R23
100k
2SC3357
Q3
C15
1000p
C9
1000p
C163
56p
F1
3.0A
2SC3356
(R24)
Q2
D8
RB051L-40
R11
4.7k
R50
2.2k
R6 22
CN6
L6
47n
R22
12
R17
150k
D52
DSA3A1
C44
1000p
R8 10
C30
120p
R24
100k
CN8
2
COM
3IN 1
OUT
L11
47n
0.47u
C12
1000p
R9 56
C98
1000p
R53
1k
C16
1000p
C21
22p
D5
HSM88AS
C71 22p
R19
100k
C85 1000p
R55
1k
C46 1000p
R35
100k
C57 47u25
C69 9p
C55 0.01u
C2
1000p
C32
1000p
CN51
C1
1000p
R28
470k
C72 22p
R34
0
C10
1000p
C84 1000p
R61
5.6
C162
27p
R52
1k
C96
18p
C80 1000p
C143
33p
R14 180 R16
82
L4
22n
L5
22n
C31
56p
C164
82p
C70 9p
CN5
1
E
2
B
3
B
1
GND1
2
GND2
3
HYST
4
VCC
5
ToVER
R60
0
R32
100k
C53
0.047u
C165
1000p
L16
15n
R70
120
R71
0
L17
18n
C166 22p
C167 100p
C146 100p
C145 22p
C160
1000p
L19
9.5T
D53
MA4PH633
L20
5T
C60
1000p
C173
18p
R73
0
C174 27p
R72 120
C155 1000p
C172
100p
C171
22p
C103
100p
C168
22p
C169
22p
C105
100p
K1
C75 33p
FINAL UNIT (X45-3732-71) (A/2)
+B1
SURGE
PROTECTOR +B2
CURRENT
PROTECTOR
GND
BACK UP
BATTERY
REVERSE
CURRENT
PROTECTION
THERMOSTAT
DC AMP
THERMAL
SENSE
TX
DRIVE
AMP
Q5
+B1
W3
W5
GND
CHARGE
MAIN DC
W4
GND
FINAL AMP
(X45-3732-71) (B/2)
+B2
DC SWITCH
DC SWITCH
ANT SW
TX ANT
RX
D8
TX-RX UNIT
(X57-6952-70)
(A/2)-CN16
TX-RX UNIT
(X57-6952-70)
(A/2)-CN15
TX-RX UNIT
(X57-6952-70)
(A/2)-CN19
Q2,3
RF AMP
2SC4116(Y)
Q8
IC2
MAX6502UKP035
IC3
NJM78L05UA
VOLTAGE
REGULATOR
Q9
DTD123EK
FAG
FAB
SURGE
ABSORPTION
D6
OUT1
IN1-
IN1+
VEE
IC1
TA75W01FU
D4,5
RF DETECTOR
D55,56
RF SWITCH
RF SWITCH
D2
VOLTAGE
REFERENCE
PD55003S
Q4
RD70HVF1-01
Q5
C112
10p
C42
100
D2
02DZ6.2(Y)
R36
0
C64
1000p
R38
33k
D56
XB15A709
D55
XB15A709
MAIN DC
GND
BACKUP
D9
MINISMDC050-02
C87
1000p
C91
1000u25
C90
1000p
C89
100p
C170
22p
D51,52
PROTECT OF REVERSE
CONNECTION
C37 C29
C118
TMP
8T
PC
FAS
PDT
BUP
GND
NC
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-751
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 SINGAPORE PTE LTD.
1 Ang Mo Kio Street 63, Singapore 569110