Kenwood TK-3360 Service Manual
UHF FM TRANSCEIVER
TK-3360
Li-ion BATTERY PACK/Ni-MH BATTERY PACK/Li-ion BATTERY PACK
KNB-55L/KNB-56N/KNB-57L
SERVICE MANUAL
Helical antenna
(KRA-27: Option)
Knob (Selector)
(K29-9451-03)
Knob (Volume)
(K29-9450-03)
© 2010-1 PRINTED IN JA PAN
B51-8906-00 (N) 552
CONTENTS
GENERAL .....................................................2
SYSTEM SET-UP .........................................3
REALIGNMENT ...........................................3
INSTALLATION ............................................5
DISASSEMBLY FOR REPAIR ......................7
CIRCUIT DESCRIPTION ..............................9
SEMICONDUCTOR DATA .........................14
TERMINAL FUNCTION .............................15
COMPONENTS DESCRIPTION .................16
Button knob
(SIDE1/SIDE2/AUX)
(K29-9453-03)
Knob (PTT)
(K29-9452-03)
Plastic cabinet assy
(A02-4087-03)
PARTS LIST ...............................................17
EXPLODED VIEW ......................................25
PACKING ....................................................26
ADJUSTMENT ..........................................27
PC BOARD
TX-RX UNIT (X57-7790-10) ...................32
SCHEMATIC DIAGRAM ............................36
BLOCK DIAGRAM .....................................42
LEVEL DIAGRAM ......................................44
OPTIONAL ACCESSORIES
KNB-55L (Li-ion Battery Pack) ..............45
KNB-56N (Ni-MH Battery Pack) ...........45
KNB-57L (Li-ion Battery Pack) ..............45
SPECIFICATIONS ...................BACK COVER
This product complies with the RoHS directive for the European market.
This product uses Lead Free solder.
TK-3360
Document Copyrights
Copyright 2010 by Kenwood Corporation. All rights re-
served.
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.
Firmware Copyrights
The title to and ownership of copyrights for firmware
embedded in Kenwood product memories are reserved for
Kenwood Corporation. Any modifying, reverse engineering, copy, reproducing or disclosing on an Internet website
of the firmware is strictly prohibited without prior written
consent of Kenwood Corporation. Furthermore, any reselling, assigning or transferring of the fi rmware is also strictly
prohibited without embedding the firmware in Kenwood
product memories.
GENERAL
INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced tech ni cians familiar with similar types of commercial grade com mu ni ca tions equipment. It contains all required service
in for ma tion for the equipment and is current as of the publication date. Changes which may occur after publication
are covered by either Service Bulletins or Manual Revisions.
These are is sued as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment in for ma tion, the full part identifi cation number should be in clud ed.
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 suffi cient description of the re quired component for proper identifi cation.
PERSONAL SAFETY
The following precautions are recommended for personal
safety:
• DO NOT transmit until all RF connectors are verifi ed se cure and any open connectors are properly terminated.
• SHUT OFF and DO NOT operate this equipment near
elec tri cal blasting caps or in an explosive atmosphere.
• This equipment should be serviced by a qualifi ed tech ni cian only.
SERVICE
This transceiver is designed for easy servicing. Refer
to the sche mat ic diagrams, printed circuit board views, and
align ment procedures contained within.
Model Type TX-RX unit
TK-3360 K X57-7790-10 450~520MHz
Frequency
range
Remarks
IF1: 49.95MHz
LOC: 50.4MHz
2
SYSTEM SET-UP
Merchandise received
License and frequency allocated by FCC
TK-3360
Choose the type of transceiver
Transceiver programming
Are you using the optional antenna?
NO
Are you using the speaker microphone?
NO
Delivery
Frequency range (MHz) RF power Type
TX/RX 450~520 5.0W TK-3360 K
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
YES
KRA-23 or KRA-27
Optional antenna
KMC-17, KMC-21 or KMC-45
Speaker microphone
(Option)
1. Modes
User mode
PC mode
Firmware
programing mode
Mode Function
User mode For normal use.
PC mode
Data programming
mode
PC test mode
Firmware
programing mode
PC test mode
Used for communication between the transceiver and PC.
Used to read and write frequency data and
other features to and from the transceiver.
Used to check the transceiver using the PC.
This feature is included in the FPU.
Used when changing the main program of
the fl ash ROM. See page 5.
REALIGNMENT
Data programming mode
PC tuning mode
2. How to Enter Each Mode
Mode Operation
User mode Power ON
PC mode
Firmware
programing mode
Received commands from PC
3. PC Mode
3-1. Preface
The transceiver is programmed by using a personal computer, a programming interface (KPG-22/22A, USB adapter
(KCT-53U)) and FPU (programming software).
The programming software can be used with a PC or
compatible. Figure 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 and USB adapter (when the interface
cable is KPG-22A, the KCT-53U can be used).
3
TK-3360
REALIGNMENT
Note:
• You must install the KCT-53U driver in the computer to
use the USB adapter (KCT-53U).
• When using the USB adapter (KCT-53U) for the fi rst time,
plug the KCT-53U into a USB port on the computer with
the computer power ON.
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.
Note:
• The data stored in the personal computer must match
Model Name and Model Type when it is written into EEPROM.
• Do not press the [PTT] key during data transmission or
reception.
3-3. KPG-22/KPG-22A Description
(PC programming interface cable: Option)
The KPG-22/22A is required to interface the transceiver
with the computer. It has a circuit in its D-sub connector
(KPG-22: 25-pin, KPG-22A: 9-pin) case that converts the RS232C logic level to the TTL level.
The KPG-22/22A connects the SP/MIC connector of the
transceiver to the RS-232C serial port of the computer.
3-4. KCT-53U Description (USB adapter: Option)
The KCT-53U is a cable which connects the KPG-22A to
a USB port on a computer.
When using the KCT-53U, install the supplied CD-ROM
(with driver software) in the computer. The KCT-53U driver
runs under Windows 2000, XP or Vista (32-bit).
3-5. FPU (Programming Software) Description
The FPU is the programming software for the transceiver
supplied on a CD-ROM. This software runs under windows
XP, Vista or 7 on a PC. The software on this disk allows a
user to program the transceiver transceivers via Programming interface cable (KPG-22/22A).
PC
FPU
Tuning cable
(E30-3216-05)
PC
D-SUB
(25-pin)
KPG-22
Transceiver Transceiver Transceiver
D-SUB
(9-pin)
KPG-22 or KPG-22A or
KPG-22A+KCT-53U
Illustration is KPG-22.
Gray
Gray/Black
1.5D-XV Lead wire
1.5D-XV Shield wire
PC
KPG-22A
+
–
+
–
PC
USB
KCT-53U
KPG-22A
Fig. 1
SP
MIC
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 modifi ed.
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.
List of FPU for transceiver
Model Type FPU
TK-3360 K KPG-128D
4
REALIGNMENT
TK-3360
4. Firmware updating procedure
The firmware is stored in the transceiver MCU built-in
fl ash ROM.
This “4. Firmware updating procedure” describes the
method of updating the fi rmware of the transceiver.
4-1. Requirements
1) A personal computer.
A PC using the Windows 2000, XP, Vista (32bit), or 7 op-
erating system, with Microsoft .NET Framework 2.0 (or
higher) installed.
Note: Windows Vista users do not need to install the
.NET Framework.
2) An optional Programming Cable (KPG-22 or KPG-22A or
KPG-22A+KCT-53U Serial communications cable) is necessary.
4-2. Start TK-2360/3360 fi rmware updating
procedures
1) Start the program by double-clicking
“TK-2360_SHxx_RELxx.exe” icon.
3) To start updating procedure, click [Write].
The following dialog box opens, explaining the fi rmware
update procedure.
4) After confi rmation of the transceiver's current fi rmware
version, the following dialog box will appear.
Fig. 2
When you are ready, click [Yes].
The new fi rmware will be transferred into the transceiver
fl ash ROM automatically as follows.
After the firmware updating step is successfully com-
pleted, the following confi rmation dialog box will appear.
Fig. 1
2) Select the COM Port you will use.
INSTALLATION
1. Channel Stopper (D32-0449-04,
D32-0450-04, D32-0451-04: Accessory)
There are 3 types of stoppers available, depending on
the number of channels used (4 channel type: white, 8
channel type: gray, and 12 channel type: black).
1. Set the Selector knob to channel 1, then pull the selector
knob off the transceiver.
• If the Selector is not positioned at channel 1, the selector
knob may not install correctly and the channel may be
unable to be changed.
2. Insert the appropriate channel stopper.
3. Reinsert the selector knob.
Fig. 3
Click [OK] to close the dialog box.
Note: If an error message appears during the update,
confi rm the COM Port setting or cable connections, then
try to update the fi rmware again.
5
TK-3360
INSTALLATION
2. Man-down Tilt Switch
(KCT-57MS: Option for K type)
The KCT-57MS is available only through Kenwood U.S.A.
Corporation.
The Man-down tilt switch can be installed in the transceiver. This section describes how to install the Man-down
tilt in the TK-2360/3360.
Installing of the KCT-57MS
2-1. Cut lead to approximately 0.12inch (3mm).
0.12inch
3mm
cut
Fig. 1
2-2.
Solder the cables(black: E37-1102-05 and red:
E37-1101-05) to the position shown in the fi gure.
black red
KCT-57MS
0.12inch
3mm
FPC
MDS
GRE
GND
RED
BWN
red
BLK
G
I
black
Fig. 4
2-5. The double-faced tape is put on the position
of fi gure.
Holder
double-faced
tape
Fig. 5
2-6. KCT-57MS is installed in the holder as shown
in fi gure.
KCT-57MS
Fig. 2
2-3. Cut the sheet (G10-0795-04)
black
0.59inch
(17.7mm)
red
1/4 2/4
KCT-57MS
3/4 4/4
0.98inch
(25mm)
SHEET (G10-0795-04)
cut
cut
KCT-57MS
Fig. 3
2-4. Solder the KCT-57MS to the TX-RX PCB.
Connect the 2 cables from the KCT-57MS to the position
shown in the following fi gure.
KCT-57MS
KCT-57MS
black
Fig. 6
2-7. The holder is installed in the chassis.
KCT-57MS
red
6
Fig. 7
DISASSEMBLY FOR REPAIR
1. Removing the Case Assembly from the
Chassis
1. Remove the volume knob q and selector knob w.
2. Remove the two screws e.
3. Lift and remove the chassis from the case assembly r.
.
TK-3360
@
.
;
Case assembly
:
2. Removing the TX-RX unit from the
Chassis
1. Remove the packing t from the chassis.
2. Remove the holder y from the chassis.
3. Detach the solder of speaker wire and mic wire from the
PCB beforehand.
4. Remove the packing u from the SP/MIC jack of the TXRX unit.
5. Remove the FPC from the fl at cable connectors i o.
6. Remove the 13 screws !0 fi xing the TX-RX unit.
Note: Take care not to put stress onto the FPC when re-
moving the screw, as the FPC is sitting on the screw.
7. Lift and remove the TX-RX unit from the chassis !1.
=
B
8
>
2
7
TK-3360
DISASSEMBLY FOR REPAIR
3. Mounting the Chassis to the Case
Assembly
1. Mount the holder q to the chassis w.
Confi rm that the holder is securely locked to the chassis.
2. Insert the packing e to the phone jack side of the chassis.
Confi rm the mounting direction of packing.
Confi rm that the packing is securely inserted to the chas-
sis and SP/MIC jack.
3. Insert the packing r to the chassis.
Confi rm that the packing is securely inserted to the chas-
sis and that it does not protrude out.
4. Insert the upper part of the chassis into the case assembly t.
5. Press the chassis and the case assembly together to attach them.
@
=
4. Attaching the Antenna Receptacle to
the Chassis
Screw the antenna receptacle to the chassis in the order
;
shown in the drawing so that the antenna receptacle
comes to the center of the case hole.
BWN
GRE
RED
BLK
Tighten this screw first.
Tighten this screw second.
:
5. The Nuts of the Volume Knob and
Channel Knob
Note that the shapes and heights of nuts of the volume
knob and channel knob are different from one another.
Use the following jig when removing the nuts of the vol-
ume knob and channel knob.
• Jig (Part No.: W05-1012-00)
Volume knob
.
@
(Long)
Channel knob
(Short)
8
CIRCUIT DESCRIPTION
TK-3360
1. Overview
The TK-3360 is a UHF portable transceiver designed to
operate in the frequency range of 450~520MHz. The unit
consists of a receiver, transmitter, phase-locked loop (PLL)
frequency synthesizer, base band parts, power supply and
control circuits.
TX/RX: 450~520MHz
ANT
1st MIX MCF SP
ANT
SW
TX
AMP
RF
AMP
450~520MHz
49.95MHz
400.05~
470.05MHz
RF
AMP
Fig. 1 Frequency confi guration
2. Frequency Confi guration
The receiver utilizes double conversion. The first IF is
49.95MHz and the second IF is 450kHz. The fi rst Local oscillator is supplied from the PLL circuit.
The PLL circuit in the transmitter generates the neces-
sary frequencies.
CF
450kHz
IF
SYSTEM
50.4MHz
X3
multiply
PLL
VCO
Audio
processor
TCXO 16.8MHz
AF
AMP
MIC
MIC
AMP
3. Receiver System
The receiver system is shown in Figure 2.
ANT
BPF
ANT
SW
TUNE
3-1. Front End (RF Amplifi er) Circuit
The signal coming from the antenna passes through the
transmit / receive switching diode circuit (D201, D202, D203
and D204) and a BPF (L418 and L419), and is then amplifi ed
by the RF amplifi er (Q407).
The resulting signal passes through a BPF (L413, L414
and L440) and goes to the mixer. These BPFs are adjusted
by variable capacitors (D431, D410, D403, D404 and D405).
The input voltage to the variable capacitor is a regulated
voltage output from the DC amplifi er (IC811).
Q407
RF AMP XF401
BPF
TUNE 1st Local
Q406
1st MIX
Fig. 2 Receiver system
CF401
CF402
MCF
Q405
IF AMP
IC401
IF,MIX,DET
Q403
X3 multiply
2nd Local
IC812
Audio
processor
X1
TCXO
16.8MHz
IC815
AF PA
3-2. First Mixer
The signal from the front end is mixed with the fi rst local
oscillator signal generated in the PLL circuit by Q406 to produce a fi rst IF frequency of 49.95 MHz.
The resulting signal passes through the XF401 MCF to
cut the adjacent spurious and provide the optimum characteristics, such as adjacent frequency selectivity.
SP
9
TK-3360
CIRCUIT DESCRIPTION
3-3. IF Amplifi er Circuit
The fi rst IF signal is passed through a four-pole monolithic crystal fi lter (XF401) to remove the adjacent channel
signal. The fi ltered fi rst IF signal is amplifi ed by the fi rst IF
amplifier (Q405) and is then applied to the IF system IC
(IC401).
The IF system IC provides a second mixer, limiting amplifi er, quadrature detector and RSSI (Received Signal Strength
Indicator). The second mixer mixes the fi rst IF signal with
the 50.4MHz signal of the second local oscillator output
(Q403) and produces the second IF signal of 450kHz.
The second IF signal is passed through the ceramic fi lter
(Wide: CF402, Narrow: CF401) to remove the adjacent channel signal. The fi ltered second IF signal is amplifi ed by the
limiting amplifi er and demodulated by the quadrature detector with the ceramic discriminator (CD401). The demodulated signal is routed to the audio circuit.
3-4. Wide/Narrow Switching Circuit
Wide and Narrow settings can be made for each channel
by switching the ceramic fi lters CF402 (Wide), CF401 (Narrow). The Wide and Narrow switching data is output from
IC809.
D401 and D402 are switched to ceramic fi lters when a
Wide/Narrow level is selected.
R424
IC401
CD401
C424
R426
50C
AFOUT
3-5. Audio Amplifi er Circuit
The demodulated signal from IC401 is sent to an AF amplifi er through IC812, and is routed to an audio power amplifi er (IC815) where it is amplifi ed and output to the speaker.
3-6. Squelch Circuit
Part of the AF signal from the IC401 enters the FM IC
(IC401) again, and the noise component is amplified and
rectifi ed by a fi lter and an amplifi er to produce a DC voltage
corresponding to the noise level.
The DC signal from the FM IC goes to the analog port of
the MCU (IC809). IC809 determines whether or not to output sounds from the speaker by checking if the input voltage is higher or lower than the preset value.
To output sounds from the speaker, IC809 sends a high
signal to the AFSW line and turns IC815 on through Q813,
Q814, Q818 and Q819.
4. Transmitter System
4-1. Microphone Amplifi er Circuit
The signal from the microphone is limited by the AGC
circuit, which is composed of D807, 808, Q810, Q811 and
the mute switch (Q809). IC812 is composed of a high-pass
fi lter, low-pass fi lter and pre-emphasis/IDC circuit.
The signal from the microphone and the low speed data
from the MCU (IC809) enter the Audio processor IC (IC812)
and pass through each path and are mixed inside the IC.
The output signal from the audio processor goes to the
VCO modulation input. The other output signal goes to the
TCXO modulation input.
QUAD
IFOUT
AFOUT
Narrow
C402
C407
MXO
C413R406
IFI
D401
CF402
R409
CF401
R408
Fig. 3 Wide/Narrow switching circuit
Wide
R412
D402
R411
C414
R415
MIC
D807,808
Q810,811
MMUTE
AGC
SW
Q809
IC812
Audio
processor
TCXO
LSD
OUT
Fig. 4 Microphone amplifi er circuit
VCO
X1
10
CIRCUIT DESCRIPTION
TK-3360
4-2. Driver and Final Amplifi er Circuit
The signal from the T/R switch (D18 is on) is amplifi ed by
the RF AMP (Q201) and pre-drive amplifi er (Q203) to 50mW.
The output of the pre-drive amplifi er is amplifi ed by the
drive amplifi er (Q204) and the RF fi nal amplifi er (Q205) to
5.0W (1W when the power is low).
The drive amplifi er and the RF fi nal amplifi er consist of
two MOS FET stages.
The output of the RF final amplifier is then passed
through the harmonic fi lter (LPF) and antenna switch (D201
and D202) and is applied to the antenna terminal.
From
T/R SW
(D18)
Q201 Q205
RF
AMP
+B
Q203
Pre-DRIVE
AMP
R307
R309
R310
Q204
DRIVE
AMP
VDD
4-3. APC Circuit
The APC circuit always monitors the current flowing
through the drive amplifi er (Q204) and the RF power amplifi er (Q205) and keeps a constant current. The voltage drop
at R307, R309 and R310 is caused by the current fl owing
through the RF fi nal amplifi er. This voltage is applied to the
differential amplifi er IC301 (1/2).
IC301 (2/2) compares the output voltage of IC301 (1/2)
with the reference voltage from IC811. The output of IC301
(2/2) controls the VG of the RF power amplifi er and the drive
amplifi er to make both voltages the same.
The change of power high/low is carried out by the
change of the reference voltage.
ANT
D201,202
RF FINAL
AMP
VG
ANT
SW
LPF
PC/BPF
(IC811)
Fig. 5 Driver and fi nal amplifi er and ACP circuit
5. Frequency Synthesizer Unit
5-1. Frequency synthesizer
The frequency synthesizer consists of the TCXO (X1),
VCO, PLL-IC (IC1), and buffer amplifi ers.
The TCXO generates 16.8MHz. The frequency stability
is 1.0ppm within the temperature range of –30°C to +60°C.
The frequency tuning and modulation of the TCXO are done
to apply voltage to pin 1 of the TCXO. The output of the
TCXO is applied to pin 10 of PLL-IC.
The VCO consists of 2 VCO and covers a dual range of
400.05~470.05MHz and 450~520MHz. The VCO generates
400.05~470.05MHz for providing the first local signal for
reception. The operating frequency is generated by Q5 in
transmitting mode and Q4 in receiving mode. The oscillation
frequency is controlled by applying the VCO control voltage,
obtained from the phase comparator (IC1) to the variable
capacitance diodes (D7 and D9 in transmitting mode and D3
and D5 in receiving mode)
IC301
(1/2)
The TX pin of IC809 goes “high” in transmitting mode,
causing Q7 and Q4 to turn off, and Q5 turn on. The TX pin
goes “low” in receiving mode.
The output from Q4 and Q5 are amplifi ed by a buffer amplifi er (Q8) and Q2, and then sent to the PLL-IC.
The PLL-ICconsists of a prescaler, reference divider,
phase comparator, and charge pump. The input signal from
pin 10 and 17 of the PLL-IC is divided down and compared
at the phase comparator. The pulsed output signal of the
phase comparator is applied to the charge pump and transformed into a DC signal in the loop fi lter (LPF). The DC signal is applied to the CV of the VCO and locked to keep the
VCO frequency constant.
PLL data is output from PLLLE (pin 46), PLLCLK (pin 47),
and PLLDAT (pin 45) of the MCU (IC809). The data is input
to the PLL-IC when the channel is changed or transmission
is changed to reception and vice versa. PLL lock condition is
always monitored by pin 48 (PLLLD) of the MCU. When the
PLL is unlocked, PLLLD goes low.
IC301
(2/2)
11
TK-3360
CIRCUIT DESCRIPTION
TX
(TX: High)
PLLLD
Q8
VCO
MCU
IC809
BUFF
CV
IC1
21
PLL
7
PLLLE,PLLCLK,PLLDAT
17
10
Q9
BUFF
D17Q2
RF
AMP
To mixer
TCXO
X1 IC812
SWLPF
VC
D18
SW To
RF AMP
Audio
processor
Fig. 6 PLL block diagram
6. Control Circuit
The control consists of the MCU (IC809) and its peripheral circuits. It controls the TX-RX unit. IC809 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 in-
put.
6) Transmitting tone and encode data.
6-1. Frequency Shift Circuit
The MCU (IC809) operates at a clock frequency of
12.0MHz. This oscillator has a circuit that shifts the frequency via Beat shift switch (Q806, Q807).
A beat sound may be able to be evaded form generation
if “Beat Shift“ is set to ON when it is generated in the internal spurious transmission modulated sound of the transceiver.
6-2. Memory Circuit
The Memory circuit consists of the MCU (IC809) and EEPROM (IC810). The EEPROM has a capacity of 64k bits and
stores the channel information, the last channel data, the
scan on status, and other parameters.
EEPROM
■
Note:
The EEPROM stores tuning data (Deviation, Squelch,
etc.).
Realign the transceiver after replacing the EEPROM.
IC809 IC810
MCU
EEPROM
Fig. 8 Memory circuit
6-3. Low Battery Warning
The battery voltage is monitored by the MCU (IC809 pin
86: BATT). When the battery voltage falls below the voltage set by the Low Battery Warning adjustment, the red
LED blinks, notifying the operator that it is time to replace
the battery (when the always option (default setting) under
the Battery Warning function in the FPU is selected). If the
battery voltage falls bellow 5.9V, the transceiver does not
transmit and the warning tone beeps while the PTT switch
is pressed.
Low battery warning Battery status
The red LED blinks during transmission.
The red LED blinks and the
warning tone beeps while the
PTT switch is pressed.
R824
SB
The battery voltage is low but
the transceiver is still usable.
The battery voltage is lowand
the transceiver cannotbe used
to make calls.
86
BATT
IC809
R829
MCU
12
IC809
MCU
XOUT XINBSHIFT
11913
C846 C854
H: OFF
L: ON
Q806 Q807
X802
Fig. 7 Frequency shift circuit
Fig. 9 Low battery warning
6-4. Battery Type Detection
The transceiver automatically detects the battery type,
measuring the resistance between the S-terminal and +terminal on the battery pack and changes the supplied voltage
to the S-terminal as below. The MCU then detects the battery type.
Resistor value Battery type Input voltage of S-terminal
1.8M
Ω
560k
Ω
220k
Ω
OPEN Battery case 0~0.3V
Li-ion 0.3~1.3V
Ni-Cd 1.3~2.6V
Ni-MH 2.6~5.0V
CIRCUIT DESCRIPTION
TK-3360
6-5. Key Input
Keys and channel selector circuit.
The signal from the keys and channel selector are direct-
ly input to the MCU, as shown in Figure 10.
Selector
57
58
59
61
EN4
EN3
EN2
EN1
IC809
MCU
ENG KEY
PTT
SIDE1
SIDE2
Q815
Level
converter
37
68
69
70
PTT
SW
ENG
SW
SIDE1
SIDE2
Fig. 10 Key input
7. Signaling Circuit
7-1. Encode
Low-speed data (QT, DQT)
■
Low-speed data is output from pin24 of the MCU. The
signal passes through the low pass CR fi lter, and goes to
the audio processor (IC812). The signal is mixed with the
audio signal and goes to the VCO and TCXO (X1) modulation
input after passing through the D/A converter inside the audio processor (IC812) for BAL adjustment.
IC809
MCU
LSDO
TXTONE
SIDETONE
24
1
2
ALT
MIC
D/A
converter
IC817
IC812
Audio Processor
18
21
24
MOD2
23
MOD1
VCO
TCXO
AF
AMP
MSK
■
The MSK signal is generated in the audio processor
(IC812). The signal passes through the D/A converter (inside
the audio processor: IC812) and is routed to the VCO. When
encoding the MSK, the microphone input signal is muted.
7-2. Dceode
QT/DQT
■
The output signal from the IF IC (IC401) enters the MCU
(IC809) through IC812. IC809 determines whether or not
the QT or DQT matches the preset value, and controls the
AFSW and speaker output sounds according to the squelch
results.
2-tone
■
Part of the received AF signal output from the IF IC (IC401)
passes through an audio processor (IC812) goes to the other AF amplifi er IC808 and 816, is compared, and then goes
to IC809. IC809 checks whether or not the 2-tone data is
necessary. If it matches, IC809 carries out a specifi ed operation, such as turning the speaker on.
MSK (Fleet Sync)
■
The MSK input signal from the IF IC (IC401) goes to
IC812. The decoded information is then processed by the
MCU.
DTMF
■
The DTMF input signal from the IF IC (IC401) goes to
IC812. The decoded information is then processed by the
MCU.
8. Power Supply
There are fi ve 5V power supplies and three 3.3V power
supplies: 50M, 50V, 50C, 50R, 50T, 33M, 33MSC and 33BC.
50M and 33M are always output while the power is on.
33MS is always output, but turns off when the power is
turned off, to prevent malfunction of the MCU.
50C is a common 5V and is output when SAVE is not set
to ON.
50R is 5V for reception and output during reception.
50T is 5V for transmission and output during transmission.
50V is 5V for the SP/MIC connector.
33B is 3.3V for the audio processor (IC812).
Fig. 11 Encode
High-speed data (2-tone, DTMF)
■
High-speed data (HDS) is output from pin 1 of the MCU.
HDS deviation made by an adjustment in the MCU is passed
through the low pass CR fi lter and then applied to the audio
processor (IC812).
The signal is mixed with the audio signal and goes to the
VCO and TCXO. The side tone is output from Pin 2 of the
MCU. The signal passes through low pass CR fi lter and D/A
converter, and goes to the audio power amplifi er. The level
is controlled by the MCU.
13
TK-3360
SEMICONDUCTOR DATA
MCU: R5F3640MDFB (TX-RX unit: IC809)
Pin No. Signal Name I/O Function
1 TXTONE O
2 SIDETONE O N tone/DTMF/voice/beep output
3 WIDE O Wide switch
4 NARROW O Narrow switch
5 HSDI I HSD input
6 BYTE I Single chip mode
7 CNVSS I Single chip mode
8NC -NC
9 BSFT O Beat shift for CPU clock
10 RESET I Reset signal input
11 XOUT O Oscillation circuit
12 VSS - GND
13 XIN I Oscillation circuit
14 VCC1 - Power supply
15 NMI/SD O NC
16 INT I INT signal input
17 VOXM O VOX mute
18 BBIRQ I IRQ from base band IC
19 BBCS O Chip select for base band IC
20 BBRXD I RXD from base band IC
21 BBCLK O Clock for base band IC
22 BBTXD O TXD for base band IC
23 VOXSW O VOX switch
24 LSDO O Low speed data output
25 EEPRXD I Data input from EEPROM
26 EEPCS O Chip select for EEPROM
27 NC - NC
28 NC - NC
29 TXD1 O
30 RXD1 I
31 CLK1 O For onboard writing
32 BUSY O For onboard writing
33 NC - NC
34 NC - NC
35 EEPTXD O Data output for EEPROM
36 EEPCLK O Clock for EEPROM
37 PTT I PTT key input
38 OPTDET I 2pin option detection
39 EPM I For onboard writing
40 MDSW I
41 EXTMICSW O
N tone/DTMF/emergency tone
output
For onboard writing/TXD for 2pin
jack
For onboard writing/RXD for 2pin
jack
External connection terminal of
man down switch
External MIC compulsion ON
switch
Pin No. Signal Name I/O Function
42 TX O Tx VCO switch/fi n fi lter
43 DACCE O Chip enable for DAC IC
44 CE I For onboard writing
45 PLLDAT O Data for PLL IC & DAC IC
46 PLLLE O Load enable for PLL IC
47 PLLCLK O Clock for PLL IC & DAC IC
48 PLLLD I Lock detect signal from PLL IC
49 33BC O 33B control
50 33MSC O 33MS control
51 50VC O 50V control
52 50TC O 50T control
53 50RC O 50R control (SAVE)
54 50CC O 50C control (SAVE)
55 AFSW O Power switch for AF amp
56 PDSW - NC
57 EN4 I Encoder input 4
58 EN3 I Encoder input 3
59 EN2 I Encoder input 2
60 VCC2 - Power supply
61 EN1 I Encoder input 1
62 VSS - GND
63 LEDR O Red LED
64 LEDG O Green LED
65 LEDB O Blue LED
66 APCSW O APC switch
67 DCSW O Discharge switch
68 EMGKEY I Emergency key input
69 SIDE1 I Side 1 key input
70 SIDE2 I Side 2 key input
71 MICM O MIC mute
72 MDINT I NC
73 NC - NC
74 MDCS O NC
75 MDRXD I NC
76 MDTXD O NC
77 MDCLK O NC
78 NC - NC
79 CVIN I NC
80 TMP I Temperature detection
81 VOLIN I AF volume level
82 VOX I VOX signal input
83 ASQL I Analog squelch input
84 RSSI I RSSI input
85 LSDI I LSD input
86 BATT I Battery voltage check
14
SEMICONDUCTOR DATA
TK-3360
Pin No. Signal Name I/O Function
87 NC - NC
88 NC - NC
89 NC - NC
90 NC - NC
91 BSEL I Battery detection
92 NC - NC
93 NC - NC
Pin No. Signal Name I/O Function
94 AVSS - GND
95 HSDI2 I DTMF detect
96 VREF I Reference voltage input
97 AVCC - Power supply
98 NC - NC
99 SIM1 I Destination selection 1
100 SIM2 I Destination selection 2
TERMINAL FUNCTION
TX-RX unit (X57-7790-10)
Pin No. Name I/O Function
CN801
1 VOL IN I Audio input
2 33MS - 33MS
3 SB - Switched B
4 SB - Switched B
5 +B - B (Battery Voltage)
6 +B - B (Battery Voltage)
7 EN2 I Encoder pulse input
8 EN4 I Encoder pulse input
9 GND - GND
10 EN3 I Encoder pulse input
11 EN1 I Encoder pulse input
Pin No. Name I/O Function
CN802
1 GND O GND
2 EMGKEY O EMG key output
3 PTT/RXD O PTT/RXD key output
4 SIDE1 O SIDE1 key output
5 SIDE2 O SIDE2 key output
6 GND O GND
CN803
1 GND I GND
2 EMGKEY I EMG key input
3 PTT/RXD I PTT/RXD key input
4 SIDE1 I SIDE1 key input
5 SIDE2 I SIDE2 key input
6 GND I GND
15
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