Kenwood TK-361SA Service Manual

UHF FM TRANSCEIVER

TK-361SA

SERVICE MANUAL

CONTENTS

Whip antenna (T90-1039-25)

Badge (B43-1190-04)

Button knob (PTT) (K29-9308-23)

Button knob (Lock/Scan) (K29-9364-03)

Knob (Channel) (K29-9318-03)

Knob (Volume) (K29-9309-03)

GENERAL .....................................................2

REALIGNMENT ...........................................3

DISASSEMBLY FOR REPAIR ......................5

CIRCUIT DESCRIPTION ..............................8

SEMICONDUCTOR DATA .........................11

COMPONENTS DESCRIPTION .................12

TERMINAL FUNCTION .............................12

PARTS LIST ...............................................13

EXPLODED VIEW ......................................19

PACKING ....................................................20

ADJUSTMENT ..........................................21

LEVEL DIAGRAM ......................................25

PC BOARD

TX-RX UNIT (X57-6900-21) ...................26

SCHEMATIC DIAGRAM ............................30

BLOCK DIAGRAM .....................................34

Plastic cabinet assy (A02-4043-03)

OPTIONAL ACCESSORIES

KBH-10 (Belt Clip) ..................................36

KNB-30A (Ni-Cd Battery Pack) .............36

KSC-31 (Rapid Charger) ........................36

SPECIFICATIONS ......................................37

This product uses Lead Free solder.

TK-361SA

GENERAL

Document Copyrights

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.

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.

Destination Number Of CH Frequency No. / Frequency Factory default CH setting RF power output

CH1 463.975MHz / QT 94.8Hz

CH2 464.125MHz / QT 88.5Hz

CH3 464.175MHz / QT 103.5Hz

CH4 464.325MHz / QT 79.7Hz

CH5 464.375MHz / QT 107.2Hz

CH6 OFF

CH7 OFF

CH8 OFF

M 8 channel

CH1 463.975MHz CH2 464.125MHz CH3 464.175MHz CH4 464.325MHz CH5 464.375MHz

1. Modes

User mode

PC mode

Clone mode

Self programming mode

REALIGNMENT

Data programming mode

PC test mode PC tuning mode

TK-361SA

Power switch/Volume control

Turn clockwise to switch the power ON and counter-

clockwise to switch the power OFF. Rotate to adjust the volume.

LED indicator

Indicates the transceiver status. Lights red while trans-

mitting, green while receiving, and ﬂ ashes red when the battery power is low while transmitting.

Mode Function

User mode For normal use.

PC mode

Data programming mode

PC test mode

Clone mode

Self programming 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 KPG-88D(M2).

Used to transfer programming data from one transceiver to another.

Used to program the transceiver without any external programming device.

2. How to Enter Each Mode

Mode Operation

User mode Power ON

PC mode Received commands from PC

Clone mode [PTT]+[Side2]+Power ON (Two seconds)

Self programming mode

[PTT]+[Side1]+Power ON (Two seconds)

3. Getting Acquainted

;

Antenna

@ .

Speaker/ microphone jacks

Battery pack (KNB-30A)

4. PC Mode

4-1. Preface

The transceiver is programmed by using a personal computer, a programming interface (KPG-22/22A, USB adapter (KCT-53U)) and programming software (KPG-88D(M2)).

The programming software can be used with a PC. Figure 1 shows the setup of a PC for programming.

4-2. 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.).

Notes:

• You must install the KCT-53U driver in the computer to

used 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 en-

tered immediately. When the PC sends a command, the

transceiver enters PC mode. When data is transmitting from the transceiver, the red

LED lights. When data is received by the transceiver, the green LED

lights.

Notes :

• The data stored in the personal computer must match

Model Name when it is written into EEPROM.

• Change the transceiver to PC mode, then attach the in-

terface cable.

4-3. 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.

PTT (Push to Talk) switch

Press and hold, then speak into the microphone to trans-

mit.

Side 1 key

Super lock (default).

Side 2 key

Scan + Temporary delete (default)

Channel selector

Rotate to change the operating channel.

4-4. 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 or XP.

TK-361SA

REALIGNMENT

4-5. Programming Software Description

The KPG-88D(M2) is the programming software for the transceiver supplied on a CD-ROM. The software on this disk allows a user to program the transceiver radios via Programming interface cable (KPG-22/22A).

4-6. Programming with PC

If data is transferred to the transceiver from a PC with the KPG-88D(M2), 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.

KPG-88D(M2)

Tuning cable (E30-3216-05)

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

– +

MIC

–

5. Clone Mode

5-1. Outline

“Clone Mode” copies the transceiver data to another

transceiver.

The dealer can copy the transceiver data to another

transceiver even without the use of a personal computer.

5-2. Example

The transceiver can copy the programming data to one

or more transceivers via RF communication.

The clone source and clone target/s must be in Clone

mode.

5-3. Operation

1. To switch the clone target/s to Clone mode, press and hold the [PTT] and [Side2] keys while turning the transceiver power ON.

2. Wait for 2 seconds. The LED will light orange and the transceiver will announce “Clone”.

3. Select a channel table number using Lock (increment channel table) and Scan(decrement channnel table) keys.

4. To switch the clone source to Clone mode, press and hold the [PTT] and [Side2] keys while turning the transceiver power ON.

5. Wait for 2 seconds. The LED will light orange and the transceiver will announce “Clone”.

6. Select the same channel table number as the clone target/s.

7. Press [PTT] on the clone source to begin data transmission.

When the clone target starts to receive data, the LED

will light green.

When the clone source ﬁ nishes sending data, a “conﬁ r-

mation” tone will sound.

If data transmission fails while cloning, an “error” tone

will sound from the target unit.

8. If the cloning fails, no data will be available in the target unit when it is returned to User mode.

9. When the cloning is successful, the target unit’s “Scan” function will return to their default values (Scan = OFF).

D-SUB

(25-pin)

KPG-22

Transceiver

D-SUB (9-pin)

KPG-22A

Transceiver

Fig. 1

USB

KCT-53U

KPG-22A

Transceiver

Notes:

• The dealer can clone data to two or more transceivers by repeating the above procedures.

• If the transceivers Clone Mode is configured as “Disabled”, the transceiver cannot enter Clone mode.

• The table shown below will cover the frequency tables used for wireless cloning.

• Clone mode cannot be entered in battery low state.

• A unit cannot be a “Source Unit” if it is unprogrammed. If [PTT] is pressed, an “error” tone will sound.

• Once a unit is set to be the source, it cannot be a target after the data has been transmitted. This protects the data in the source unit.

• If the target unit is cloned successfully, it will return to User Mode.

• If the target unit is not cloned successfully, the led will remain Orange.

REALIGNMENT

TK-361SA

• The source Unit and target Unit must be of the same model type and destination in order for Clone to operate.

• Clone mode cannot be accessed if “Super Lock” is activated.

• Electronic interface may cause a failure in data transfer during Wireless Clone, such as when waveforms or electromagnetics are being performed at the workbench.

• Clone mode can be used ONLY by the authorized service personnel.

• The Clone mode setting must be conﬁ gured as “Disable” before being delivered to the end-user.

• To clone, replace the antenna from both the source transceiver and the target transceiver with a dummy load.

• The transmit output power is automatically set to Low in Clone mode.

DISASSEMBLY FOR REPAIR

Removing the case assembly from the chassis

■

1. Remove the volume knob q and channel knob w.

2. Remove the two screws e.

3. Lift and remove the chassis from the case assembly r. (Use a ﬂ at-blade screwdriver to easily lift the chassis.)

;

Clone Frequency Table

Table number Frequency (MHz)

1 463.9750

2 464.1250

3 464.1750

4 464.3250

5 464.3750

Removing the TX-RX unit from the chassis

■

1. Remove the packing t from the SP/MIC jack of the TXRX unit.

2. Remove the eleven screws y ﬁ xing the TX-RX unit.

3. Remove the ﬁ xing bracket u of the SP/MIC.

4. Remove the solder of the antenna terminal with a soldering iron i.

5. Remove the solder of the positive terminal with a soldering iron o.

Note: You can remove the TX-RX unit from the chassis

without removing the solder at the positive terminal. However, in this case, you can not attach the packing (G53-1605-03) that is on the positive terminal to the chassis in assembling. So, it is advisable to remove the solder on the positive terminal ﬁ rst.

6. Remove the FPC from the ﬂ at cable connector !0.

7. Lift and remove the TX-RX unit from the chassis !1.





TK-361SA

DISASSEMBLY FOR REPAIR

Removing the battery release lever from the

■

case assembly

1. Press the upper part of the lever toward the inside of the case assembly. One side of the shaft will be removed q.

2. Lift and remove the battery release lever from the case assembly w.

Attaching the battery release lever to the case

■

assembly

1. Insert one side of the shaft into the hole at the lever ﬁ tting section on the case assembly q.

Caution: The thin spring (G01-4543-14) should be posi-

tioned above the two tabs of the lever.

2. Tilt the battery release lever slightly forward w, so that the thick spring (G01-4542-04) is positioned below the case surface.

3. With the thick spring positioned below the case surface, attach the other side of the shaft to the case assembly by pressing the battery release lever e until it snaps into place r.

Caution: Be careful not to tilt the battery release lever

too forward.

If the battery release lever is pushed in this state where

the two tabs come below the case surface, there is a possibility of damaging the two tabs.

Assembling the battery release lever

■

1. Place the lever w onto the stopper q.

2. Place the thick spring e onto the lever.

3. Hook the right and left ends of the thin spring r onto the tabs of the stopper, then place the thin spring onto the lever t.

4. Slide the shaft through the hole of the stopper and lever

;

Cautions for assembly

■

1. Attaching the positive terminal to the chassis

Always attach the positive terminal to the chassis, using

the following procedures, before mounting the TX-RX unit onto the chassis.

1. Remove the holder assembly w from the packing q of the positive terminal.

2. Mount the packing of the positive terminal into the chassis hole e.

3. Mount the holder assembly into the packing of the positive terminal r.

;

Two tabs

A thick spring

A thin spring

Shaft

;

DISASSEMBLY FOR REPAIR

TK-361SA

2. Mounting the chassis to the case assembly

1. Confirm that the waterproof packing attached to the circumference of the chassis is securely inserted in the groove of the chassis q.

2. Attach the speaker to the speaker recess of the case assembly w. Make sure the speaker is securely inserted.

Confirm that the waterproof packing is securely inserted in the groove of the chassis.

3. Insert the upper part of the chassis into the case assembly e.

Caution: Take care that the speaker lead wire is not

caught by the microphone element.

4. Press the chassis r and the case assembly together to attach them.

Caution: If the packing of the SP/MIC does not come

to the correct position after attaching the chassis to the case assembly, reposition the packing with your ﬁ ngers.

4. The nuts of the volume knob and channel knob

Note that the shapes, colors and heights of nuts of the

volume knob and channel knob are different from one another. (The nut of volume knob is stainless steel, and the nut of channel knob is brass)

Use the following jig when removing the nuts of the vol-

ume knob and channel knob.

• Jig (Part No. : W05-1012-00)

Volume Knob

(Stainless steel)

Channel Knob

(Brass)

5. Screw sequence for mounting the TX-RX unit to the chassis

Attach the TX-RX unit to the chassis using the screws in

the order shown in the drawing below.

;

3. 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.

Tighten this screw first.

Tighten this screw second.

TX-RX UNIT Component side view





6. Connecting the speaker wires to the TX-RX unit

Note: To connect the speaker wires, you must solder it

to the location of the TX-RX unit as illustrated below.

SP–

SP+

TX-RX UNIT Component side view

TK-361SA

CIRCUIT DESCRIPTION

1. Frequency Conﬁ guration

The receiver utilizes double conversion. The first IF is

38.85MHz and the second IF is 450kHz. The ﬁ rst local oscillator signal is supplied from the PLL circuit.

The PLL circuit in the transmitter generates the neces-

sary frequencies. Fig. 1 shows the frequencies.

ANT

463.975~464.375MHz

ANT

AMP

425.125~

425.525MHz

463.975~464.375MHz

1st MIX

MCF

38.85MHz

450kHz

SYSTEM

38.4MHz

multiply

AMP

PLL

VCO

AMP

TCXO

MIC

AMP

12.8MHz

MIC

Fig. 1 Frequency conﬁ guration

2. Receiver

The frequency conﬁ guration of the receiver is shown in

Fig. 2.

ANT

Front End (RF AMP)

■

The signal coming from the antenna passes through the

transmit/receive switching diode circuit, (D103, D104, D106 and D122) passes through a BPF (L229 and L228), and is ampliﬁ ed by the RF ampliﬁ er (Q205).

The resulting signal passes through a BPF (L214, L212 and L211) and goes to the mixer (Q204). These BPFs are adjusted by variable capacitors (D203, D204, D205, D206 and D210). The input voltage to the variable capacitor is regulated by voltage output from the micro control unit (MCU) (IC405).

First Mixer

■

The signal from the front end is mixed with the ﬁ rst local oscillator signal generated in the PLL circuit by Q3 to produce a ﬁ rst IF frequency of 38.85MHz.

RF AMP

BPF

Q205

PCTV

CF201

IC201

IF, MIX, DET

X3 multiply

2nd Local 12.8MHz

BPF

PCTV

IC301

AQUA-L

TCXO

MIXER

Q204

1st Local

AF VOL

Fig. 2 Receiver section

MCF

XF201

IC302 AF PA

IF AMP

Q203

The resulting signal passes through the XF201 MCF to cut the adjacent spurious and provide the opitimun characteristics, such as adjacent frequency selectivity.

IF Ampliﬁ er Circuit

■

The ﬁ rst IF signal is passed through a four-pole monolithic crystal ﬁ lter (XF201) to remove the adjacent channel signal.

The ﬁ ltered ﬁ rst IF signal is ampliﬁ ed by the ﬁ rst IF ampliﬁ er (Q203) and then applied to the lF system IC (IC201). The IF system IC provides a second mixer, second local oscillator, limiting ampliﬁ er, quadrature detector and RSSI (Received Signal Strength Indicator). The second mixer mixes the ﬁ rst IF signal with the 38.4MHz of the second local oscillator output (Q1) and produces the second IF signal of 450kHz.

The second IF signal is passed through the ceramic ﬁ lter (CF201) to remove the adjacent channel signal. The ﬁ ltered 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.

Audio Ampliﬁ er Circuit

■

The demodulated signal from IC201 goes to AF ampliﬁ er through IC301.

The signal then goes through an AF volume control, and is routed to an audio power ampliﬁ er (IC302) where it is ampliﬁ ed and output to the speaker.

Squelch

■

Part of the AF signal from the IC enters the FM IC (IC201) again, and the noise component is ampliﬁ ed 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 (IC405). IC405 determines whether to output sounds from the speaker by checking whether the input voltage is higher or lower than the preset value.

To output sounds from the speaker, IC405 sends a high signal to the SP MUTE line and turns IC302 on through Q303, Q304, Q305, Q306 and Q316. (See Fig. 3)

IC201 FM IF

IF AMP

BUSY

QT/DQT IN

IC405

MCU

AF CONT

SIGNAL

QT/DQT

CLK, DATA,

STD, LOADN

IC301

AQUA-L

Q306,316

IC302 AF PA

Q303,304,305

Fig. 3 AF ampliﬁ er and squelch

CIRCUIT DESCRIPTION

TK-361SA

Receive Signaling

■

• QT/DQT

The output signal from FM IC (IC201) enters the MCU (IC405) through IC301. IC405 determines whether the QT or DQT matches the preset value, and controls the SP MUTE and the speaker output sounds according to the squelch results.

3. PLL Frequency Synthesizer

The PLL circuit generates the ﬁ rst local oscillator signal for reception and the RF signal for transmission.

PLL

■

The frequency step of the PLL circuit is 5 or 6.25kHz.

A 12.8MHz reference an oscillator signal is divided at IC1 by a ﬁ xed counter to produce oscillator (VCO) output signal which is buffer ampliﬁ ed by Q2 then divided in IC1 by a programmable counter. The divided signal is compared in phase with the 5 or 6.25kHz reference signal from the phase comparator in IC1. The output signal from the phase comparator is ﬁ ltered through a low-pass ﬁ lter and passed to the VCO to control the oscillator frequency. (See Fig. 4)

VCO

■

The operating frequency is generated by Q4 in transmit mode and Q3 in receive mode. The oscillator frequency is controlled by applying the VCO control voltage, obtained from the phase comparator, to the varactor diodes (D2, D4, D6 and D7 in transmit mode and D3, D5, D8 and D9 in receive mode). The RX pin is set high in receive mode causing Q5 turn on.

The TX pin is set high in transmit mode. The outputs from Q3 and Q4 are ampliﬁ ed by Q6 and sent to the RF ampliﬁ ers.

LPF

D2,4 D6,7

D3,5 D8,9

TX VCO

RX VCO

BUFF AMP

Q5,7

T/R SW

RF AMP

RX TX

Unlock Detector

■

If a pulse signal appears at the LD pin of IC1, an unlock condition occurs, and the DC voltage obtained from C4, R5, and D1 causes the voltage applied to the MCU (IC405) to go low. When the MCU detects this condition, the transmitter is disabled, ignoring the push-to-talk switch input signal.

4. Transmitter System

Microphone Ampliﬁ er

■

The signal from the microphone passes through IC301.

The signal passes through the Audio processor (IC301) for the maximum deviation adjustment, and goes to the VCO modulation input.

MIC

AGC

IC405

MCU

AQUA-L

LPF

BEEP

IC301

QTVCO

QTTCXO

LPF

LPF TCXO

Fig. 5 Microphone ampliﬁ er

Drive and Final Ampliﬁ er

■

The signal from the T/R switch (D101) is ampliﬁ ed by the pre-drive (Q101) to 50mW.

The output of the drive ampliﬁ er is ampliﬁ ed by the RF power amplifier (Q102 and Q103) to 2W (1W when the power is low). The RF power ampliﬁ er consists of two MOS FET stages. The output of the RF power ampliﬁ er is then passed through the harmonic ﬁ lter (LPF) and antenna switch (D103 and D122) and applied to the antenna terminal.

Q101 Q102

Pre-drive

AMP

5T5T

R127

R128

R129

Drive

AMP

VGVG

Q103

Final AMP

VDD

T/R SW

(D101)

Q100

AMP

VCO

D103,122

ANT

LPF

PLL DATA

12.8MHz

5kHz/6.25kHz

1/N

REF OSC

1/M

5kHz/6.25kHz

Fig. 4 PLL circuit

Phase

comparator

Charge

pump

IC1

PLL IC

PCTV

(IC405)

IC101

(1/2)

IC101

(2/2)

Fig. 6 Drive and ﬁ nal ampliﬁ er and APC circuit

APC Circuit

■

The APC circuit always monitors the current flowing through the RF power ampliﬁ er (Q102 and Q103) and keeps a constant current. The voltage drop at R127, R128 and R129 is caused by the current ﬂ owing through the RF power ampliﬁ er and this voltage is applied to the differential ampliﬁ er IC101 (1/2).

TK-361SA

CIRCUIT DESCRIPTION

IC101 (2/2) compares the output voltage of IC101 (1/2) with the reference voltage from MCU (IC405). The output of IC101 (2/2) controls the VG of the RF power ampliﬁ er, Drive ampliﬁ er and Pre-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.

Encode Signaling

■

• QT/DQT

QT,DQT data of the QTTCXO Line is output from pin 28 of the MCU (IC405). The signal passes through a low-pass CR ﬁ lter and goes to the TCXO (X1).

The QT,DQT data of the QTVCO Line is output from pin 24 of the MCU. The signal passes through a low pass CR ﬁ lter, mixes with the audio signal, and goes to the VCO modulation input. TX deviation is adjusted by the MCU.

5. Power Supply

There are four 5V power supplies 5M, 5C, 5R, and 5T. 5M for MCU (IC405) is always output while the power is on.

5M is always output, but turns off when the power is turned off to prevent malfunction of the MCU.

5C is a common 5V and is output when SAVE is not set to OFF.

5R is 5V for reception and output during reception.

5T is 5V for transmission and output during transmission.

Memory Circuit

■

Memory circuit consists of the MCU (IC405) and an EEPROM (IC406). An EEPROM has a capacity of 64k bits that contains the transceiver control program for the MCU and data such as transceiver channels and operating features.

IC405

MCU

IC406

EEPROM

Fig. 8 Memory circuit

Low Battery Warning

■

The battery voltage is checked by the MCU (IC405).

The transceiver generates a warning tone when it falls below the warning voltage shown in the table. (1) The red LED blinks when the battery voltage falls below

the voltage (1) shown in the table during transmission. Note: The transceiver checks the battery voltage during recep-

tion even when, in the FPU, the Battery Warning status

function is set to “On TX” (default setting). However, the LED does not blink during reception. Dur-

ing transmission, the LED blinks to generate the warning

tone of a low battery voltage. (2) The transceiver immediately stops transmission when

the battery voltage falls below the voltage (2) shown in

the table. A message tone beeps while the PTT switch is

released.

6. Control Circuit

The control circuit consists of a MCU (IC405) and its peripheral circuits. It controls the TX-RX unit. IC405 mainly performs the following: (1) Switching between transmission and reception by the

PTT signal input. (2) Reading system, group, frequency, and program data

from the memory circuit. (3) Sending frequency program data to the PLL. (4) Controlling squelch on/off by the DC voltage from the

squelch circuit. (5) Controlling the audio mute circuit by the decode data in-

put. (6) Transmitting tone and encode data.

Frequency Shift Circuit

■

The MCU (IC405) operates at a clock of 7.3728MHz. This oscillator has a circuit that shifts the frequency by BEAT SHIFT SW (Q407, Q408).

A beat sound may be able to be evaded from generation if “Beat Shift” is set to ON when it is generated in the internal spurious transmission modulated sound of a transceiver.

IC405

MCU

BSHIFT

XIN

XOUT

Q408 H: OFF L: ON

Q407 H: OFF L: ON

Ni-Cd Battery

(1) 6.2V

(2) 5.9V

R404

R406

BATT

IC405

MCU

Fig. 9 Low battery warning

7. Control System

Keys and channel selector circuit. The signal from keys and channel selector input to MCU

(IC405) directly as shown in ﬁ g. 10.

Channel selector

IC405

MCU

EN1

EN2

EN3

EN4

EN5

Fig. 10 Control system

PTT

PF1

PF2

PTT SW

SW1

SW2

Fig. 7 Frequency shift circuit

SEMICONDUCTOR DATA

Micro Control Unit: 30622MAP490GU (TX-RX unit IC405)

Pin No.

1 PCTV O APC/BPF control data output

2 BEEP O BEEP Output

3NC -NC

4 EEPDAT I/O EEPROM data input/output

5 EEPCLK O EEPROM clock output

6 BYTE - GND

7 GND - GND

8 BSHIFT O Beat shift switch

9NC -NC

10 RESET I CPU reset

11 XOUT O CPU clock (7.3728MHz)

12 VSS - GND

13 XIN I CPU clock (7.3728MHz)

14,15 VCC - +5V

16 INT I Battery voltage monitor input

17 TCLK/DTRDO I Base band IC data input

18 RDF/FD I Base band IC data input

19 SCLK O Base band IC clock output

20 D I/O I/O Base band IC data input/output

22 DIR O Base band IC data output

23 STD I Base band IC data input

24 QT VCO O QT/DQT output

25 DTRLOADN O Base band IC data output

26 1/2 OSC O 3.6864MHz (7.3728MHz/2)

27 PTT I PTT switch input

28 QT TCXO O QT/DQT output

29 TXD O Serial data (FPU/FLASH)

30 RXD I Serial data (FPU/FLASH)

31 GND - GND

32 APCSW O APC switch

33,34 NC - NC

35 DCSW O APC voltage discharge switch

36 - - Not used

37 RX_SW O RX VCO switch

38 TX_SW O TX VCO switch

39 GND - GND

40 PLL_UL I PLL unlock detect input

41 PLL_STB O PLL strobe output

42 PLL_DAT O PLL data output

43 PLL_CLK O PLL clock output

Pin Name I/O Function

TDATA/DTRCLK

O Base band IC data output

Pin No.

44 VCC - +5V

45 - - Not used

46 EN5 I Channel selectable input

47 EN4 I Channel selectable input

48 EN3 I Channel selectable input

49 EN2 I Channel selectable input

50 EN1 I Channel selectable input

51 OPTDET I Headset input detect

52 AF_CONT O Speaker mute

54 - - Not used

55~59

60 VCC - +5V

61 NC - NC

62 VSS - GND

63,64 GND - GND

65~71

72 LEDTX O Red LED lights control output

73 LEDRX O Green LED lights control output

74 PF1 I Lock key input

75 PF2 I Scan key input

76 SIM1 - GND

77 SIM2 - GND

78,79 NC - NC

80 5T_C O 5T control output

81 5R_C O 5R control output

82 5C_C O 5C control output

83~87

88 BATT I Battery voltage input

89 RSSI I

90 BUSY I Busy level input

91 VOX I VOX level input

92 QT/DQT_IN I QT/DQT input

93 TH_DET I Thermistor input

94 AVSS - GND

95 NC - NC

96 VREF - +5V

97 AVCC - +5V

98 NC - NC

99 MIC_Mute O MIC mute

100 NC - NC

Pin Name I/O Function

Calling Alert SW

NC - NC

TK-361SA

O Calling alert switch

Received Signal Strength Indicator input

TK-361SA

COMPONENTS DESCRIPTION

TX-RX Unit (X57-6900-21)

Ref. No. Part Name Description

IC1 IC PLL system

IC101 IC Comparator (APC)

IC201 IC FM IF system

IC301 IC Audio processor

IC302 IC AF AMP

IC401,402

IC403 IC Voltage detector/ Reset

IC404 IC Voltage detector/ Int

IC405 IC Micro control unit

IC406 IC EEPROM

Q1 Transistor Tripler

Q2 Transistor PLL IC f_in AMP

Q3 FET VCO/ RX

Q4 FET VCO/ TX

Q5 Transistor DC switch/ TX VCO

Q6 Transistor RF Buffer AMP

Q7 Transistor DC switch/ RX VCO

Q8 Transistor Ripple ﬁ lter

Q9,100 Transistor RF AMP

Q101 FET Pre-drive AMP

Q102 FET TX Drive AMP

Q103 FET TX Final AMP

Q104 Transistor APC switch

Q105 FET APC switch

Q107 Transistor APC switch

Q108 FET APC switch

Q109 Transistor APC switch

Q203 Transistor IF AMP

Q204 FET Mixer

Q205 FET RF AMP

Q301 Transistor TX DEV adjustment

Q302 Transistor MIC AGC

Q303 Transistor DC switch/ SP Mute

Q304 Transistor DC switch

IC Voltage Regulator/ 5V

Ref. No. Part Name Description

Q305 Transistor DC switch/ SP Mute

Q306 FET SP Mute switch

Q316 FET SP Mute switch

Q317,318

Q401 Transistor LED switch/ Red

Q402 Transistor LED switch/ Green

Q403 FET 5T switch

Q404 FET 5R switch

Q405 Transistor 5C switch

Q407,408

D1 Diode Rectiﬁ cation

D6,7

D8,9

D10

D11 Diode Current steering

D101 Diode TX/RX RF switch

D102 Zener Diode APC protect

D103,104

D106 Diode ANT switch

D122 Diode ANT switch

D202 Diode TX/RX RF switch

D203~206

D210

D301,302

D303 Diode Isolation

D401 Diode Reverse current protection

D402 Diode Reverse Protection

D403 LED LED/ Red

D404 LED LED/ Green

D405 Zener Diode Limiter

FET Audio switch

FET Beat Shift switch

Variable Capacitance Diode

Diode ANT switch

Variable Capacitance Diode

Diode Detector

Frequency control/ TX VCO

Frequency control/ RX VCO

Frequency control/ TX VCO

Frequency control/ RX VCO

Frequency control/ TX VCO

Frequency control/ RX VCO

Modulator

RF BPF tuning

CN401

Pin No. Name I/O Function

1 B I B (Battery Voltage)

2 SB O Switched B

3 SP1 I Audio input

4 SP2 O Audio output

5 GND - GND

TERMINAL FUNCTION

Pin No. Name I/O Function

6 EN1 I Channel selector pulse input

7 EN2 I Channel selector pulse input

8 GND - GND

9 EN3 I Channel selector pulse input

10 EN4 I Channel selector pulse input

11 EN5 I Channel selector pulse input

PARTS LIST

TK-361SA

New Parts.

✽

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.

Ref. No.

indicates safety critical components.

New

Ad dress

Parts No. Description

parts

TK-361SA

1 1A A02-3944-13 PLASTIC CABINET (CABINET ASSY) 2 1A ✽ A02-4043-03 PLASTIC CABINET ASSY (8CH) 3 3A A10-4094-43 CHASSIS 4 1B A21-1645-23 DRESSING PANEL (CABINET ASSY)

6 1C B09-0680-03 CAP (SP/MIC) ACCESSORY 7 2B B11-1817-04 ILLUMINATION GUIDE 8 1B B43-1190-04 BADGE (CABINET ASSY) 9 1C ✽ B62-2096-00 INSTRUCTION MANUAL

11 1A D10-0649-03 LEVER (CABINET ASSY) 12 1A D21-0863-04 SHAFT (CABINET ASSY) 13 1A D32-0441-13 STOPPER (CABINET ASSY)

15 2A E04-0465-05 RF COAXIAL RECEPTACLE (SMA) 16 3B E23-1253-04 TERMINA L(BATT-) 17 2B E37-1175-05 PROCESSED LEAD WIRE (SP+) 18 2B E37-1176-05 PROCESSED LEAD WIRE (SP-)

20 3A F20-3353-14 INSULATING SHEET (CHASSIS BATT+)

22 2A G01-4542-04 COIL SPRING (CABINET ASSY) 23 1A G01-4543-14 COIL SPRING (CABINET ASSY) 24 2B G10-1330-04 FIBROUS SHEET (AUDIO IC) 25 2A G11-4283-04 RUBBER SHEET (FINAL FET) 26 2A G11-4313-04 SHEET (MIC ELEMENT)

27 3A G13-2033-04 CUSHION (BATT-) 28 3B G13-2034-14 CUSHION (BATT-) 29 3A G13-2038-24 CUSHION (CHASSIS-CERAMIC FILTER) 30 2A G13-2039-14 CUSHION (PCB-CERAMIC FILTER) 31 3B G13-2045-04 CUSHION (CHASSIS)

32 2B G13-2076-04 CUSHION (SPEAKER) 33 2B G13-2088-04 CUSHION (CHASSIS,VR,CH) 34 3A G53-1604-03 PACKING (CHASSIS) 35 3A G53-1605-03 PACKING (BATT+) 36 2B G53-1606-13 PACKING (VOL/CH/LED)

37 1B G53-1607-03 PACKING (SP/MIC) 38 2B G53-1608-03 PACKING (SPEAKER) 39 2A G53-1609-14 PACKING (MIC ELEMENT) 40 2B G53-1610-04 PACKING (SMA)

42 2C H12-3179-05 PACKING FIXTURE 43 3D ✽ H52-2246-02 ITEM CARTON CASE

45 1C J19-5472-03 HOLDER (SP/MIC) ACCESSORY 46 2A J19-5473-03 HOLDER ASSY (BATT+) 47 2B J21-8478-04 MOUNTING HARDWARE 48 2B J21-8525-03 MOUNTING HARDWARE 49 2C J29-0734-05 BELT HOOK ACCESSORY

50 2B J82-0092-05 FPC

Destination

L : Scandinavia K : USA P : Canada Y : PX (Far East, Hawaii) T : England E : Eu rope Y : AAFES (Europe) X : Australia M : Oth er Areas

TK-361SA (Y50-5920-21)

TX-RX UNIT (X57-6900-21)

Ref. No.

E 2A,2B N83-2005-48 PAN HEAD TAPTITE SCREW (PCB) 57 1C N99-2046-05 SCREW SET ACCESSORY

59 2B R31-0661-05 VARIABLE RESISTOR

61 2B S60-0435-05 ROTARY SWITCH

63 1B T07-0760-25 SPEAKER 64 1C T90-1039-25 WHIP ANTENNA ACCESSORY

66 2D ✽ W08-0969-35 CHARGER ACCESSORY 67 1D W08-0971-35 AC ADAPTER ACCESSORY 68 2D ✽ W09-1001-15 BATTERY ASSY ACCESSORY

Ad dress

New

Parts No. Description

parts

TX-RX UNIT (X57-6900-21)

D403 B30-2156-05 LED (RED) D404 B30-2157-05 LED (YELLOW)

C1 CK73HB1H332K CHIP C 3300PF K C2 CK73HB1C682K CHIP C 6800PF K C3 CK73GB1A105K CHIP C 1.0UF K C4 CK73HB1C103K CHIP C 0.010UF K C5 CK73HB1H102K CHIP C 1000PF K

C6 CK73HB1A104K CHIP C 0.10UF K C7,8 CC73HCH1H101J CHIP C 100PF J C9 CC73HCH1H100C CHIP C 10PF C C10 CS77CP0J100M CHIP TNTL 10UF 6.3WV C11 CC73HCH1H101J CHIP C 100PF J

C12 CK73HB1H102K CHIP C 1000PF K C13 CK73HB1A104K CHIP C 0.10UF K C14 CK73HB1C103K CHIP C 0.010UF K C15 CC73HCH1H100C CHIP C 10PF C C16 CK73HB1H102K CHIP C 1000PF K

C17 CC73HCH1H470J CHIP C 47PF J C18 CC73HCH1H180J CHIP C 18PF J C19 CK73HB1A104K CHIP C 0.10UF K C21 CS77CP0J100M CHIP TNTL 10UF 6.3WV C22 CS77AA1VR33M CHIP TNTL 0.33UF 35WV

C24 CK73HB1H102K CHIP C 1000PF K C25 CC73HCH1H020B CHIP C 2.0PF B C26 CC73HCH1H300J CHIP C 30PF J C27 CS77CA1C3R3M CHIP TNTL 3.3UF 16WV C29,30 CK73HB1H471K CHIP C 470PF K

C32 CS77CA1V0R1M CHIP TNTL 0.1UF 35WV C33,34 CK73HB1H102K CHIP C 1000PF K C35 CC73HCH1H270J CHIP C 27PF J C38 CC73HCH1H050B CHIP C 5.0PF B C39 CK73GB1H332K CHIP C 3300PF K

Destination

52 1A K29-9308-23 BUTTON KNOB (CABINET ASSY) 53 1B K29-9309-03 KNOB (VOLUME) 54 1B K29-9318-03 KNOB (CHANNEL) 55 1A K29-9364-03 BUTTON KNOB (CABINET ASSY)

A 2B N14-0819-04 CIRCULAR NUT (VOLUME) B 2B N14-0832-04 CIRCULAR NUT (CHANNEL) C 2A,2B N30-2604-48 PAN HEAD MACHINE SCREW (SMA) D 3A N30-2606-48

PAN HEAD MACHINE SCREW (CHASSIS)

C40 CC73HCH1H030B CHIP C 3.0PF B C41 CK73GB1H682K CHIP C 6800PF K C42 CC73HCH1H050B CHIP C 5.0PF B C43 CC73HCH1H100C CHIP C 10PF C C44 CK73HB1H471K CHIP C 470PF K

C45 CK73GB1A105K CHIP C 1.0UF K C47 CC73HCH1H101J CHIP C 100PF J C48 CK73HB1H471K CHIP C 470PF K

+ 29 hidden pages

Kenwood TK-361SA Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

GENERAL

1. Modes

REALIGNMENT

2. How to Enter Each Mode

3. Getting Acquainted

4. PC Mode

5. Clone Mode

DISASSEMBLY FOR REPAIR

Removing the case assembly from the chassis

Removing the TX-RX unit from the chassis

Assembling the battery release lever

Cautions for assembly

CIRCUIT DESCRIPTION

2. Receiver

3. PLL Frequency Synthesizer

4. Transmitter System

5. Power Supply

6. Control Circuit

7. Control System

SEMICONDUCTOR DATA

Micro Control Unit: 30622MAP490GU (TX-RX unit IC405)

COMPONENTS DESCRIPTION

TX-RX Unit (X57-6900-21)

TERMINAL FUNCTION

PARTS LIST

TK-361SA

TX-RX UNIT (X57-6900-21)