Kenwood TK-3000 K User manual

SERVICE MANUAL
UHF FM TRANSCEIVER
TK-3000
K, M, M2, M3, M4, M6, M7, E, T2 versions
This product uses Lead Free solder.
This product complies with the RoHS directive for the European market.
COPYRIGHT © 2015 JVC KENWOOD Corporation No.RQ073
2015/6
B5B-7202-00
This service manual has been revised due to the addition of TK-3000 type M3, M4, M6,
M7, E, T2. This service manual is applies to products with B4901021 (K, M, M3, M7
types) / B4B01113 (M2, M4 types) / B5305070 (M6 type) / B4905881 (E, T2 types) or
subsequent serial numbers.
REVISED

TK-3000
2
Document Copyrights
Copyright 2015 by JVC 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 other-
wise, for any purpose without the prior written permission of
JVC KENWOOD Corporation.
Disclaimer
While every precaution has been taken in the preparation
of this manual, JVC KENWOOD Corporation assumes no
responsibility for errors or omissions. Neither is any liability
assumed for damages resulting from the use of the informa-
tion contained herein. JVC KENWOOD Corporation reserves
the right to make changes to any products herein at any time
for improvement purposes.
Firmware Copyrights
The title to and ownership of copyrights for firmware
embedded in Kenwood product memories are reserved for
JVC KENWOOD Corporation. Any modifying, reverse en-
gineering, copy, reproducing or disclosing on an Internet
website of the firmware is strictly prohibited without prior
written consent of JVC KENWOOD Corporation. Further-
more, any reselling, assigning or transferring of the firmware
is also strictly prohibited without embedding the firmware in
Kenwood product memories.
Service Manual List
Title Parts number Type Serial number PCB number
TK-3000 B51-8939-00 K,M,M2 - J79-0306-09
TK-3000 B51-8973-00 M6 - J79-0306-19
TK-3000 B53-7006-00 E,T - J79-0306-29
TK-3000 B5B-7202-00
(This service manual)
K,M,M3,M7 From B4901021
J7C-0010-00
M2,M4 From B4B01113
M6 From B5305070
E,T2 From B4905881
CONTENTS
GENERAL....................................................3
SYSTEM SET-UP .........................................3
REALIGNMENT ...........................................4
DISASSEMBLY FOR REPAIR .....................6
CIRCUIT DESCRIPTION .............................7
SEMICONDUCTOR DATA .........................10
COMPONENTS DESCRIPTION ................11
PARTS LIST ...............................................12
EXPLODED VIEW......................................19
ADJUSTMENT...........................................20
PC BOARD
TX-RX UNIT (X57-810X-XX)...................26
BLOCK DIAGRAM.....................................30
LEVEL DIAGRAM ......................................32
SPECIFICATIONS......................................33
APPENDIX (SCHEMATIC DIAGRAM X57-810X-XX)

TK-3000
3
SYSTEM SET-UP
Choose the type of transceiver
Transceiver programming
Delivery
Are you using the speaker microphone?
A personal computer, programming interface (KPG-22/22A),
and FPU (programming software) are required for programming.
(The frequency, TX power HI/LOW, and signaling data are
programmed for the transceiver.)
YES
NO
KMC-21 or KMC-45
Speaker microphone
(Option)
Are you using the optional antenna? YES
NO
TX/RX 440~480
4.0W
TK-3000 K,M,M3,M7
Frequency range (MHz) RF power Type
Merchandise received
Optional antenna
KRA-23 or KRA-27
TX/RX 400~430
TX/RX 350~390
TX/RX 440~470
TK-3000 M2,M4
TK-3000 M6
TK-3000 E,T2
GENERAL
INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced techni-
cians familiar with similar types of commercial grade com-
munications equipment. It contains all required service
information for the equipment and is current as of the pub-
lication date. Changes which may occur after publication
are covered by either Service Bulletins or Manual Revisions.
These are issued as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment informa-
tion, the full part identification number should be included.
This applies to all parts : components, kits, or chassis. If the
part number is not known, include the chassis or kit number
of which it is a part, and a sufficient description of the re-
quired component for proper identification.
PERSONAL SAFETY
The following precautions are recommended for personal
safety:
• DO NOT transmit until all RF connectors are verified
secure and any open connectors are properly terminated.
• SHUT OFF and DO NOT operate this equipment near
electrical blasting caps or in an explosive atmosphere.
• This equipment should be serviced by a qualified techni-
cian only.
SERVICE
This transceiver is designed for easy servicing. Refer
to the schematic diagrams, printed circuit board views, and
alignment procedures contained within.
Model Type TX-RX unit Frequency
range Remarks
TK-3000
K,M,M3,M7 X57-8103-00 440~480MHz
IF1: 38.85MHz
LOC: 38.4MHz
M2,M4
X57-8103-01 400~430MHz
M6 X57-8100-23 350~390MHz
E,T2
X57-8102-71 440~470MHz

TK-3000
4
Note:
• The data stored in the personal computer must match
Model Name and Model Type when it is written into EE-
PROM.
• Do not press the [PTT] key during data transmission or
reception.
3-3. KPG-22A Description
(PC programming interface cable: Option)
The KPG-22A is required to interface the transceiver with
the computer. It has a circuit in its D-sub connector (KPG-22A:
9-pin) case that converts the RS-232C logic level to the TTL
level.
The KPG-22A connects the SP/MIC connector of the
transceiver to the RS-232C serial port of the computer.
3-4. KPG-22U Description
(USB programming interface cable: Option)
The KPG-22U is a cable which connects to a USB port
on a computer.
When using the KPG-22U, install the supplied CD-ROM
(with driver software) in the computer. The KPG-22U driver
runs under Windows XP, Vista, 7 or 8.
3-5. Programming Software KPG-137D Description
The KPG-137D is the programming software for the
transceiver supplied on a CD-ROM. This software runs un-
der windows XP, Vista, 7 or 8 on a PC. The software on this
disk allows a user to program the transceiver via Program-
ming interface cable (KPG-22A/22U).
Note:
• Use the FPU that matches the market when you first set
the market code and model name/frequency data to the
service unit. The unit set by mistake cannot be restored.
• Receive frequencies listed below may result in the in-
terference of reception due to the harmonics of internal
oscillators. Enter a frequency not listed in the table.
No.
FREQUENCY (MHz)
TK-3000
K,M,M3,M7
TK-3000
M2,M4 TK-3000 M6 TK-3000 E,T2 *1
1 441.59375 403.19375 364.79375 441.59375
2 441.59500 403.19500 364.79500 441.59500
3 441.60000 403.20000 364.80000 441.60000
4 441.60500 403.20500 364.80500 441.60500
5 441.60625 403.20625 364.80625 441.60625
6 460.79375 422.39375 383.99375 460.79375
7 460.79500 422.39500 383.99500 460.79500
8 460.80000 422.40000 384.00000 460.80000
9 460.80500 422.40500 384.00500 460.80500
10 460.80625 422.40625 384.00625 460.80625
11 479.99375 - - 479.99375
12 479.99500 - - 479.99500
13 480.00000 - - 480.00000
*1: Guaranteed frequency range 440~470MHz
REALIGNMENT
1. Modes
Mode Function
User mode For normal use.
PC mode Used for communication between the trans-
ceiver and PC.
Data programming
mode
Used to read and write frequency data and
other features to and from the transceiver.
PC test mode Used to check the transceiver using the PC.
This feature is included in the FPU.
Clone mode Used to transfer programming data from
one transceiver to another.
2. How to Enter Each Mode
Mode Operation
User mode Power ON
PC mode Received commands from PC
Clone mode [PTT]+[Side]+Power ON (Two seconds)
3. PC Mode
3-1. Preface
The transceiver is programmed by using a personal com-
puter, a programming interface (KPG-22A/22U) and FPU-
programming software (KPG-137D: ver. 2.20 or later).
The programming software can be used with a PC. Fig-
ure 1 shows the setup of a PC for programming.
3-2. Connection Procedure
1. Connect the transceiver to the personal computer with
the interface cable.
Note:
• You must install the KPG-22 driver in the computer to use
the USB programming interface cable (KPG-22U).
2. When the POWER is switched on, user mode can be
entered immediately. When the PC sends a command,
the transceiver enters PC mode.
When data is read from the transceiver, the red LED
lights.
When data is written to by the transceiver, the green LED
lights.
User mode
Data programming mode
PC test mode PC tuning mode
PC mode
Clone mode

TK-3000
5
3-6. Programming with PC
If data is transferred to the transceiver from a PC with the
FPU, the data for each set can be modified.
Data can be programmed into the EEPROM in RS-232C
format via the SP/MIC jack.
In this mode the PTT line operate as TXD and RXD data
lines respectively.
4. Clone mode
Programming data can be transferred from one trans-
ceiver to another by connecting them via their SP/MIC con-
nectors.
Cloning can be performed as described below (the trans-
mit transceiver is the source and the receive transceiver is
the target).
The following data cannot be cloned.
• Tuning data
• Model name data
• ESN data
1. Turn the source transceiver and target transceiver power
OFF.
2. Turn the source transceiver power ON while pressing the
[PTT] and [Side] keys, to enter clone mode.
3. Connect the cloning cable (part No. E30-3410-05) to the
SP/MIC connectors on the source and target transceiv-
ers.
4. Turn the target transceiver power ON.
5. Press the [Side] key on the source transceiver. The data of
the source is sent to the target. While the source is send-
ing data, red LED will light. While the target is receiving
the data, green LED will light. When cloning of data is
completed, the source red LED turned off, and the target
automatically operates in the User mode.
6. Additional targets can be continuously cloned. When
the [Side] key on the source is pressed, the data of the
source is sent to the target again. Repeat steps 3 to 5 to
clone additional transceivers.
Note:
• The Model name and Market codes must be the same in
order to clone the transceiver.
• If the transceivers clone mode is configured as “Disabled”,
the transceiver cannot enter clone mode.
• If the Read authorization password is set to the trans-
ceiver, the transceiver cannot enter to the clone mode.
• Cannot be cloned if the password (overwrite password) is
programmed to the target.
Fig. 2
PC KPG-22A or KPG-22U or
Illustration is KPG-22A.
FPU
Tuning cable
(E30-3216-05)
D-SUB
(9-pin)
Transceiver Transceiver
KPG-22A
PC
Gray
Gray/Black
1.5D-XV Lead wire
1.5D-XV Shield wire
+
–
+
–
SP
MIC
USB
KPG-22U
PC
Cloning cable
(E30-3410-05)
REALIGNMENT
Fig. 1

TK-3000
6
DISASSEMBLY FOR REPAIR
1. Separating the Case Assembly from the
Chassis
1. Remove the two knobs (a).
2. Remove the two screws (b).
3. Expand the right and left sides of the bottom of the case
assembly, Iift the chassis, and remove it from the case
assembly (c).
4. Taking care not to cut the speaker lead (d), open the
chassis and case assembly.
Note:
Solder the speaker wire back in its original position if you
have removed it.
2. Removing the TX-RX unit from the
Chassis
1. Remove the packing (e).
2. Remove the 13 screws (f).
3. Remove the packing (g) and two hexagon nuts (h).
4. Remove the solder from the antenna terminal using a
soldering iron then lift the unit off (i).
Note:
When reassembling the unit in the chassis, be sure to
solder the antenna terminal.
3. Removing the Rear Panel
1. Raise the rear panel on the chassis (j).
aa
b
b
c
j
Antenna terminal
e
f
g
h
i
h
d
–
+
BRN
GRN

TK-3000
7
1. Frequency Configuration
The receiver utilizes double conversion. The first IF is
38.85MHz and the second IF is 450kHz. The first Local os-
cillator is supplied from the PLL circuit.
The PLL circuit in the transmitter generates the neces-
sary frequencies.
CIRCUIT DESCRIPTION
2. Receiver System
The receiver system is shown in Figure 2.
Fig. 1 Frequency configuration
Fig. 2 Receiver system
2-1. Front End (RF Amplifier) Circuit
The signal coming from the antenna passes through the
transmit/receive switching diode circuit (D101, D102, D103
and D105) and a BPF (L208 and L210), and is then ampli-
fied by the RF amplifier (Q204).
The resulting signal passes through a BPF (L215, L218
and L219) and goes to the mixer. These BPFs are adjusted
by variable capacitors (D201 D202, and D204). The input
voltage to the variable capacitor is a regulated voltage out-
put from the DAC (IC300).
2-2. First Mixer
The signal from the front end is mixed with the first local
oscillator signal generated in the PLL circuit by Q203 to pro-
duce a first IF frequency of 38.85 MHz.
The resulting signal passes through the XF200 MCF to
cut the adjacent spurious and provide the optimum charac-
teristics, such as adjacent frequency selectivity.
TX/RX: 400~430/440~480/350~390/440~470MHz
1st MIX MCF SP
MIC
CF
450kHz
ANT
ANT
SW
RF
AMP
IF
SYSTEM
X2
doubler
PLL
VCO
38.85MHz 38.4MHz
TX
AMP
RF
AMP
AF
AMP
MIC
AMP
AF
filter
TCXO 19.2MHz
311.15~351.15/
401.15~441.15/
361.15~391.15/
401.15~431.15MHz
400~430/440~480/350~390/440~470MHz
SP
ANT
IC200
IF,MIX,DET
Q203
1st MIX
IC303
CF200
ANT
SW
Q201
X2 doubler
2nd Local
X1
TCXO
19.2MHz
BPF
BPF
Q204
RF AMP XF200
MCF
Q202
IF AMP
IC302
AF PA
BPF 1st Local
BPF AFfilter VR500

TK-3000
8
2-3. IF Amplifier Circuit
The first IF signal is passed through a four-pole mono-
lithic crystal filter (XF200) to remove the adjacent channel
signal.
The filtered first IF signal is amplified by the first IF ampli-
fier (Q202) and then applied to the lF system IC (IC200).
The IF system IC provides a second mixer, second local
oscillator, limiting amplifier, quadrature detector and RSSI
(Received Signal Strength Indicator).The second mixer
mixes the first IF signal with the 38.4MHz of the second lo-
cal oscillator output (TCXO X1) and produces the second IF
signal of 450kHz.
The second IF signal is passed through the ceramic filter
(CF200) to remove the adjacent channel signal. The filtered
second IF signal is amplified by the limiting amplifier and
demodulated by the quadrature detector with the ceramic
discriminator (CD201).The demodulated signal is routed to
the audio circuit.
2-4. Audio Amplifier Circuit
The demodulated signal from IC200 is amplified by
IC305, IC303 and goes to AF amplifier through IC302.
The signal then goes through an volume control (VR500),
and is routed to an audio power amplifier (IC302) where it is
amplified and output to the speaker.
To output sounds from the speaker, IC400 sends a high
signal to the SPMUT line and turns IC400 on through Q300,
Q301, Q302 and Q306.
3. Transmitter System
3-1. Microphone Amplifier Circuit
The signal from microphone amplified by IC301 and goes
through mute switch (IC300).
IC304 is composed of high-pass filter, low-pass filter and
pre-emphasis/IDC circuit.
The output signal from the DAC IC (IC300) goes to the
VCO modulation input.
Fig. 3 Microphone amplifier circuit
3-2. Driver and Final Amplifier Circuit
The signal from the T/R switch (D100 is on) is amplified
by the pre-drive amplifier (Q100) to 30mW.
The output of the pre-drive amplifier is amplified by the
drive amplifier (Q101) and the RF final amplifier (Q102) to
4.0W (1W when the power is low).
The drive amplifier and the RF final amplifier consist of
two MOS FET stages.
The output of the RF final amplifier is then passed
through the harmonic filter (LPF) and antenna switch (D101
and D102) and is applied to the antenna terminal.
CIRCUIT DESCRIPTION
BUFF X1
TCXO
VCO
LSDO
IC300
MIC
DAC
AMP
IC304
LSDO
MIC
IC301
ANT
RF FINAL
AMP
ANT
SW LPF
From
T/R SW
(D100)
D101,102
+B
POWC
Q102
DRIVE
AMP
Q101
VDD
VG
Pre-DRIVE
AMP
Q100
R121
R122
R123
CURDET
Fig. 4 Drive and final amplifier circuit

TK-3000
9
CIRCUIT DESCRIPTION
4. Frequency Synthesizer Circuit
4-1. Frequency Synthesizer
The frequency synthesizer consists of the TCXO (X1),
VCO, PLL IC (IC1) and buffer amplifiers.
The TCXO generates 19.2MHz. The frequency stability is
2.5 ppm within the temperature range of –30 to +60°C.
The frequency tuning and modulation of the TCXO are
done to apply a voltage to pin 1 of the TCXO. The output of
the TCXO is applied to pin 1 of the PLL IC.
The VCO consists of 1VCO and covers a triple range of
the 350.00~390.00/400.00~430.00/440.00~470.00 (480.00)
MHz and the 311.15~351.15/361.15~391.15/401.15~431.15
(441.15) MHz. The VCO generates 311.15~351.15/361.15~
391.15/401.15~431.15 (441.15) MHz for providing to the first
local signal in receive.
The PLL IC consists of a prescaler, reference divider,
phase comparator, charge pump (The frequency step of the
PLL circuit is 5 or 6.25 kHz).
PLL data is output from DATA (pin 19), CLOCK (pin 18)
and PLDL (pin 20) of the MCU (IC400). The data are input to
the PLL IC when the channel is changed or when transmis-
sion is changed to reception and vice versa. A PLL lock con-
dition is always monitored by the pin 22 (PLUL) of the MCU.
When the PLL is unlocked, the PLUL goes low.
Fig. 5 PLL block diagram
5. Control Circuit
The control consists of the MCU (IC400) and its peripher-
al circuits. It controls the TX-RX unit. IC400 mainly performs
the following;
1) Switching between transmission and reception by PTT
signal input.
2) Reading channel information, frequency, and program
data from the memory circuit.
3) Sending frequency program data to the PLL.
4) Controlling squelch on/off via the DC voltage from the
squelch circuit.
5) Controlling the audio mute circuit via the decode data
input.
6) Transmitting tone and encode data.
Note:
The EEPROM stores tuning data (Deviation, Squelch,
etc.).
Realign the transceiver after replacing the EEPROM.
6. Signaling Circuit
6-1. Encode
■Low-speed data (QT, DQT)
Low-speed data is output from pin 49 (LSDO) of the MCU
(IC400). The signal passes through a low-pass CR filter. The
signal is mixed with the audio signal and goes to the VCO
and TCXO (X1) modulation input after signal processing in
the DAC IC (IC300).
■High-speed data (DTMF)
High-speed data (HSD) is output from pin 50 (HSDO) of
the MCU.
The signal passes through a low-pass CR filter. TX devia-
tion making an adjustment by MCU is applied to the DAC IC
(IC300). The signal is mixed with the audio signal and goes
to the VCO and TCXO.
6-2. Decode
■QT/DQT
The output signal from IF IC (IC200) enters the MCU
(IC400) through IC300. IC400 determines whether the QT
or DQT matches the preset value, and controls the SPMUT
and the speaker output sounds according to the squelch re-
sults.
Fig. 6 Encode
7. Power Supply
There are five 5V power supplies for the MCU:
5M is always output while the power is on.
5C is a common 5V and is output when SAVE is not set
to ON.
5R is 5V for reception and output during reception.
5T is 5V for transmission and output during transmission.
5MS is 5V for the SP/MIC connector and the DAC IC
(IC300)
INV
VCO
PLL
MCU
IC400
CLOCK,PLDL
IC1
PLUL
8
1
5
14
RF
SWLPF To mixer
LSDO
Q6
BUFF
Q5
TCXO
X1
SW To
RF AMP
T/RSHF
(TX: Low)
D100
D200
Q1
CV
AMP
DATA,
HSDO
LSDO
IC400
MCU
IC300
DAC
AF
AMP
TCXO
50
49
19
20
FADJ
VCO
24
MOD
21
BEEP
18
12

TK-3000
10
SEMICONDUCTOR DATA
MCU:F2136ACNKDRD (TX-RX unit: IC400)
Pin No. Signal Name I/O Function
1NC ONC
2 VREF - Reference voltage input
3 MODE I Mode select for MCU
4NC ONC
5NC ONC
6 RESET I Reset signal input
7 XOUT O Oscillation circuit
8 Vss - GND
9 XIN I Oscillation circuit
10 Vcc - Power supply
11 BSFT O Beat shift for MCU clock
12 NC O NC
13 NC O NC
14 NC O NC
15 E2WP O Write protect for EEPROM
16 E2DAT I/O Data input/output from EEPROM
17 E2CLK O Clock for EEPROM
18 CLOCK O Clock for PLL/DAC IC
19 DATA O Data for PLL/DAC IC
20 PLDL O Load enable for PLL IC
21 PLPS O Power saving for PLL IC
22 PLUL I Lock detect signal from PLL IC
23 NC O NC
24 EN4 I Encoder input 4
25 EN3 I Encoder input 3
26 EN2 I Encoder input 2
27 EN1 I Encoder input 1
28 NC O NC
29 OPTDET I 2pin option detection
30 LEDR O LED (Red) control
31 LEDG O LED (Green) control
32 SPMUT O Power switch for AF amp
33 NC O NC
34 5TC O 5T control
35 5CC O 5C control (SAVE)
36 5MSC O 5MS control
37 DACLD O Load enable for DAC IC
38 PTT I PTT key input
39 PFKEY I PF key input
40 INT I INT signal input
41 VDCSW O Voltage discharge switch
42 WID/NAR O Wide/Narrow control
43 RXD I Serial data input (FPU)
44 TXD O Serial data output (FPU)
Pin No. Signal Name I/O Function
45 NC O NC
46 NC O NC
47 VOXIN I VOX level input
48 CVDET I VCO voltage detection
49 LSDO O Low speed data output
50 HSDO O DTMF/beep output
51 BATT I Battery voltage input
52 RSSI I RSSI input
53 SQL I Squelch input
54 LSDIN I LSD input
55 THDET I Thermistor input
56 CURDET I Current detection
57 T/RSHF O VCO Shift control
58 5VC O 5V control
59 NC O NC
60 NC O NC
61 NC O NC
62 TYPE2 I Destination selection 2
63 TYPE1 I Destination selection 1
64 5RC O 5R control