Kenwood TK-3168 Service Manual

UHF FM TRANSCEIVER

TK-3168

SERVICE MANUAL

Antenna (KRA-27: Option)

Knob (CH-SELECTOR) (K29-9280-13)

Knob (VOLUME) (K29-9278-13)

Cabinet assy (A02-3835-43)

B51-8655-00 (S) 141

CONTENTS

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

SYSTEM SET-UP .................................................2

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

DISASSEMBLY FOR REPAIR .............................. 4

CIRCUIT DESCRIPTION ....................................... 6

INSTALLATION..................................................10

TERMINAL FUNCTION......................................11

SEMICONDUCTOR DATA ................................. 12

COMPONENTS DESCRIPTION .........................13

PARTS LIST........................................................14

EXPLODED VIEW...............................................21

PACKING ............................................................ 22

ADJUSTMENT ................................................... 23

PC BOARD

TX-RX UNIT (X57-6730-XX).........................28

SCHEMATIC DIAGRAM.....................................32

BLOCK DIAGRAM..............................................36

LEVEL DIAGRAM...............................................38

KSC-30................................................................39

SPECIFICATIONS............................BACK COVER

Knob (PTT) (K29-9332-03)

Does not come with antenna. Antenna is available as an option.

TK-3168

GENERAL / SYSTEM SET-UP

INTRODUCTION

SCOPE OF THIS MANUAL

This manual is intended for use by experienced technicians familiar with similar types of commercial grade communications equipment. It contains all required service information 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 issued as required.

ORDERING REPLACEMENT PARTS

When ordering replacement parts or equipment information, 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 required component for proper identification.

Unit Model & destination

TK-3168

TX-RX Unit Frequency range Remarks

A X57-6730-31 440~480MHz

A3 X57-6730-32 400~430MHz

IF1 : 49.95MHz LOC : 50.4MHz IF1 : 49.95MHz LOC : 50.4MHz

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 technician only.

SERVICE

This radio is designed for easy servicing. Refer to the schematic diagrams, printed circuit board views, and alignment procedures contained within.

SYSTEM SET-UP

Merchandise received

Choose the type of transceiver

Transceiver programming

Are you using the optional antenna?

Are you using the speaker microphone?

Delivery

Frequency range (MHz) RF power Type

TX/RX 440~480 TX/RX 400~430

A personal computer (IBM PC or compatible), programming interface (KPG-22), and programming software (KPG-82D) are required for programming. (The frequency, TX power HI/LOW, and signalling data are programmed for the transceiver.)

YES

KRA-23 or KRA-27

Optional antenna

KMC-17 or KMC-21

Speaker microphone

(Option)

4.0W

TK-3168 (A) TK-3168 (A3)

REALIGNMENT

TK-3168

REALIGNMENT

1. Modes

User mode

PC mode

Mode Function

User mode For normal use. PC mode Used for communication between the

Data programming Used to read and write frequency data mode PC test mode Used to check the radio using the PC.

Data programming mode

PC test mode

radio and PC (IBM compatible).

and other features to and from the radio.

This feature is included in the KPG82D.

PC tuning mode

2. How to Enter Each Mode

Mode Operation

User mode Power ON PC mode Received commands from PC

that converts the RS-232C logic level to the TTL level.

The KPG-22 connects the SP/MIC connector of the TK-3168

to the computer’s RS-232C serial port.

3-4. Programming software description

KPG-82D is the programming software for TK-3168 supplied on a CD-ROM. This software runs under Windows 98, ME, Windows 2000 or XP on an IBM-PC or compatible machine.

The data can be input to or read from TK-3168 and edited on the screen. The programmed or edited data can be printed out. It is also possible to tune the transceiver.

IBM-PC

KPG-22

Gray + Gray/Black –

1.5D-XV Lead wire +

1.5D-XV Shield wire –

RF Power meter

or SSG

KPG-82D

Tuning cable (E30-3216-05)

}

MIC

}

3.PC Mode

3-1. Preface

The TK-3168 transceiver is programmed using a personal computer, a programming interface (KPG-22) and programming software (KPG-82D).

The programming software can be used with an IBM PC or compatible. Figure 1 shows the setup of an IBM PC for programming.

3-2. Connection procedure

1. Connect the TK-3168 to the personal computer with the

interface cable.

2. When the POWER is switched on, user mode can be

entered immediately. When the PC sends a command, the radio 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 the

model type when it is written into the EEPROM.

• Change the TK-3168 to PC mode, then attach the interface

cable.

Fig. 1

3-3. KPG-22 description

(PC programming interface cable: Option)

The KPG-22 is required to interface the TK-3168 with the computer. It has a circuit in its D-subconnector (25-pin) case

TK-3168

DISASSEMBLY FOR REPAIR

1. Separating the case assembly from the chassis.

1. Remove the volume knob z.

2. Remove the two screws

3. Lift the chassis Note: After separating the case assembly from the chassis,

remove the channel knob.

2. Separating the chassis from the TX/RX unit.

1. Remove the two screws v fixing the TX/RX unit B/2.

2. Remove the twelve screws the TX/RX unit A/2.

3. Remove the solder from the antenna terminal using a soldering iron

and remove it from the case assembly.

, then lift the unit off.

and two screws n fixing

3. How to remove the battery terminal block.

1. Remove the two screws /, then pull out the back cover Ω.

2. Remove the screw

≈.

Note: The two screws

battery terminal block

of TX/RX unit A/2 are fixing the

DISASSEMBLY FOR REPAIR

TK-3168

Assembling

• Installation of battery terminal block and packing

Install them so that no distortion or deformation occurs.

• Installation of speakers and cushion, and wire styling of speakers

• Installation of chassis and cabinet assy

Do not press this area, top packing easily deform.

First, mount the set to the cabinet assy.

Second, press down the Chassis to the cabinet assy as shown in the diagram.

Wire Styling

Install the speakers so that they do not protrude from the cushion. Perform the wire styling of speakers as shown in a photograph.

Install the cushion according to the guide.

• Attaching the cushion

Attach the cushion as shown in Fig. 1.

G13-2017-04

G13-2020-04

Fig. 1

Note: Cushion must not cover the screws A,B and C.

Take screw B and MIC edge as reference line when sticking.

G13-2018-04 Stick between screw

A and B.

Good Condition NG Condition

After mount, packing should be in this condition.

Packing protruded out.

Note:

• Take care that the packing does not protrude from the chassis or case.

• Replace the protruded or deformed packing with a new one.

Packing deform.

TK-3168

CIRCUIT DESCRIPTION

1. Frequency Configuration

The receiver utilizes double conversion. The first IF is 49.95 MHz and the second IF is 450 kHz. The first local oscillator signal is supplied from the PLL circuit.

The PLL circuit in the transmitter generates the necessary frequencies. Fig. 1 shows the frequencies.

ANT

400 ~ 430MHz (A3)

ANT SW

AMP

440 ~ 480MHz (A)

TX: 400 ~ 430MHz (A3)

TX AMP

MCF

49.95MHz

390.05 ~ 430.05MHz (

RX:

350.05 ~ 380.05MHz (A3) RF

AMP

IF SYSTEM

50.4MHz

X3 multiply

CF 450kHz

)

PLL

VCO

TCXO

AF AMP

MIC AMP

16.8MHz

440 ~ 480MHz (A)

TX/RX:

Fig. 1 Frequency configuration

2. Receiver

The frequency configuration of the receiver is shown in Fig. 2.

ANT

ANT SW

IC401 IF,MIX,DET

Q4 X3 multiply

2nd Local

RF AMP Q404

BPF

TUNE

CF401

IC602 AF Amp

TCXO

IC601

AQUA

16.8MHz

Fig. 2 Receiver section

BPF

TUNE

MIXER Q403

1st Local

AF VOL

MCF

XF401

IC605

AF PA

IF AMP Q402

MIC

3) IF Amplifier Circuit

The first IF signal is passed through a four-pole monolithic crystal filter (XF401) to remove the adjacent channel signal. The filtered first IF signal is amplified by the first IF amplifier (Q202) and then applied to the lF system IC (IC401). 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 50.4MHz of the second local oscillator output (TCXO X1) and produces the second IF signal of 450kHz. The second IF signal is passed through the ceramic filter (CF401) 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 (CD401). The demodulated signal is routed to the audio circuit.

4) Wide/Narrow Switching Circuit

Narrow and Wide settings can be made for each channel by switching the demodulation level. The WIDE (low level) and NARROW (high level) data is output from IC805, pin 54. When a WIDE (low level) data is received, Q401 turn on. When a NARROW (high level) data is received, Q401 turn off. Q401 turns off/on with the Wide/Narrow data and the IC401 detector output level is switched to maintain a constant output level during wide or narrow signals.

Q402

AFOUT

QUAD

IFO

IC401 FM IF SYSTEM

1) Front End (RF AMP)

The signal coming from the antenna passes through the transmit/receive switching diode circuit, (D204,D206,D208 and D212) passes through a BPF (L413 and L414), and is amplified by the RF amplifier (Q404). The resulting signal passes through a BPF (L409,L408 and

407) and goes to the mixer. These BPFs are adjusted by variable capacitors (D402,D403,D404,D405 and D406). The input voltage to the variable capacitor is regulated by voltage output from the microprocessor (IC805).

2) First Mixer

The signal from the front end is mixed with the first local oscillator signal generated in the PLL circuit by Q403 to produce a first IF frequency of 49.95 MHz. The resulting signal passes through the XF401 MCF to cut the adjacent spurious and provide the opitimun characteristics, such as adjacent frequency selectivity.

W/N

L : Wide H : Narrow

R408

Q401

R409

C409

CD401

Fig. 3 Wide/Narrow switching circuit

5) Audio Amplifier Circuit

The demodulated signal from IC401 is amplified by IC602, and goes to AF amplifier through IC601. The signal then goes through an AF volume control (VR801), and is routed to an audio power amplifier (IC605) where it is amplified and output to the speaker.

CIRCUIT DESCRIPTION

RECEIVE SIGNALING

TK-3168

6) Tone Volume Fixed Circuit

This function generates a TONE signal sound even if the AF volume of the transceiver is the minimum. A TONE signal is sent through Q602 to the AF amplifier when, in the FPU, “TONE Volume Fixed” is set to ON.

IC805

CPU

BEEP

BEEPSW

IC601

AQUA

TONE VOL FIXED

[VOL Position vs Output Level]

500

Output Level (mV)

Min

VOL

Q602

SP-J

OFF

Center Max

IC605

TA7368F

Hi: ON LOW: OFF

Fig. 4 Tone volume fixed circuit

7) Squelch

Part of the AF signal from the IC enters the FM IC (IC401) again, and the noise component is amplified and rectified by a filter and an amplifier to produce a DC voltage corresponding to the noise level. The DC signal from the FM IC goes to the analog port of the microprocessor (IC805). IC805 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, IC805 sends a high signal to the SP MUTE line and turns IC605 on through Q603,Q604,Q607 and Q608. (See Fig. 5)

8) Receive Signalling

(1) QT/DQT The output signal from IF IC (IC401) enters the microprocessor (IC805) through IC601. IC805 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.

(2) DTMF The DTMF input signal from the IF IC (IC401) is amplified by IC602 and goes to IC601, the DTMF decoder. The decoded information is then processed by the CPU.

RECEIVE SIGNALING

FM IF IC401

IF Amp

AN SQL

CPU

IC805

IC602 IF Amp

LSDI

HSDI

SP MUTE

SIGNAL

DTMF

QT/DQT

CLK,DATA, STD,LOADN

IC601

AQUA

IC605

AF PA

Fig. 5 AF amplifier and squelch

3. PLL Frequency Synthesizer

The PLL circuit generates the first local oscillator signal for

reception and the RF signal for transmission.

1) PLL

The frequency step of the PLL circuit is 5 or 6.25kHz. A 16.8MHz reference an oscillator signal is divided at IC1 by a fixed counter to produce oscillator (VCO) output signal which is buffer amplified by Q9 then divided in IC1 by a dual-module 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 filtered through a low-pass filter and passed to the VCO to control the oscillator frequency.(See Fig. 6)

2) VCO

The operating frequency is generated by Q6 in transmit mode and Q5 in receive mode. The oscillator frequency is controlled by applying the VCO control voltage, obtained from the phase comparator, to the varactor diodes (D4 and D7 in transmit mode and D3 and D9 in receive mode). The RX pin is set high in receive mode causing Q8 and Q12 to turn Q6 off and turn Q5 on. The TX pin is set high in transmit mode. The outputs from Q5 and Q6 are amplified by Q9 and sent to the RF amplifiers.

Q608 SW

Q603,604,607 SW

TK-3168

LPF

D4,7

CIRCUIT DESCRIPTION

TX VCO

BUFF AMP

RF AMP

Q11

RF AMP

MIC

AGC

IC601

AQUA

VCO

RX VCO

5kHz/6.25kHz

PHASE

COMPARATOR

5kHz/6.25kHz

Q8, 12

T/R SW

CHARGE

PUMP

PLL DATA

16.8MHz

D3,9

PLL IC IC1

1/N

REF OSC

1/M

Fig. 6 PLL circuit

3) Unlock Detector

If a pulse signal appears at the LD pin of IC1, an unlock condition occurs, and the DC voltage obtained from C19, R6, and Q1 causes the voltage applied to the microprocessor to go high. When the microprocessor detects this condition, the transmitter is disabled, ignoring the push-to-talk switch input signal.(See Fig. 7)

IC1

PLL IC

R16

C19

IC805

CPU

Fig. 7 Unlock detector circuit

4. Transmitter System

1) Microphone Amplifier

The signal from the microphone passes through IC601. When encoding DTMF, it is turned OFF for muting the microphone input signal by IC601. The signal passes through the Audio processor (IC601) for the maximum deviation adjustment, and goes to the VCXO modulation input.

LPF

IC805

RX TX

DTMF

CPU

LSDVCO

LSDTCXO

LPF

X1 TCXO

Fig. 8 Microphone amplifier

2) Drive and Final Amplifier

The signal from the T/R switch (D201 is on) is amplified by the pre-drive (Q206) and drive amplifier (Q207) to 50mW. The output of the drive amplifier is amplified by the RF power amplifier (Q211) to 4.0W (1W when the power is low). The RF power amplifier consists of two MOS FET stages. The output of the RF power amplifier is then passed through the harmonic filter (LPF) and antenna switch (D204 and D206) and applied to the antenna terminal.

LPF

From

T/R SW

(D201)

Q205

AMP

PCTV

(IC805)

Q206

Pre-DRIVE

AMP

R256 R257 R261

Q207 Q211

DRIVE

AMP

IC201

(1/2)

POWER AMP

VDD

IC201

(2/2)

D204 D206

ANT

VGVG

Fig. 9 Drive and final amplifier and APC circuit

3) APC Circuit

The APC circuit always monitors the current flowing through the RF power amplifier (Q211) and keeps a constant current. The voltage drop at R256, R257 and R261 is caused by the current flowing through the RF power amplifier and this voltage is applied to the differential amplifier IC201(1/2). IC201(2/2) compares the output voltage of IC201(1/2) with the reference voltage from IC805. The output of IC201(2/2) controls the VG of the RF power amplifier, Drive amplifier and Pre-Drive amplifier to make both voltages the same. The change of power high/low is carried out by the change of the reference voltage.

4) Encode Signalling

(1) QT/DQT QT,DQT data of the LSDTCXO Line is output from pin 22 of the CPU. The signal passes through a low-pass CR filter and goes to the TCXO(X1). The QT,DQT data of the LSDVCO Line is output from pin

CIRCUIT DESCRIPTION

20 of the CPU. The signal passes through a low pass CR filter, mixes with the audio signal, and goes to the VCO modulation input. TX deviation is adjusted by the CPU.

(2) DTMF High-speed data is output from pin 2 of the CPU. The signal passes through a low-pass CR filter, and provides a TX and SP out tone, and is then applied to the audio processor (IC601). The signal is mixed with the audio signal and goes to the VCO.

TX deviation is adjusted by the CPU.

5. Power Supply

There are 3.5V power supply for PLL circuit and five 5V power supplies for the microprocessor: 5M,5MS,5C,5R, and 5T. 5M for microprocessor 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 microprocessor.

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.

6. Control Circuit

The control circuit consists of a microprocessor (IC805) and its peripheral circuits. It controls the TX-RX unit. IC805 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

input. (6) Transmitting tone and encode data.

1) Frequency Shift Circuit

The microprocessor (IC805) operates at a clock of

7.3728MHz. This oscillator has a circuit that shifts the frequency by BEAT SHIFT SW (Q810). 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.

TK-3168

X801C834

Q810

Hi: OFF LOW: ON

Fig. 10 Frequency shift circuit

2) Memory Circuit

Memory circuit consists of the CPU (IC805) and an EEPROM (IC804). An EEPROM has a capacity of 64k bits that contains the transceiver control program for the CPU and data such as transceiver channels and operating features.

IC805

CPU

Fig. 11 Memory circuit

3) Low Battery Warning

The battery voltage is checked using by the microprocessor. 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.

(2)The red LED blinks when the battery voltage falls below

the voltage (2) shown in the table during transmission.

Note:

The transceiver checks the battery voltage during reception 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. During transmission, the LED blinks to generate the warning tone of a low battery voltage.

(3)The transceiver immediately stops transmission when

the battery voltage falls below the voltage (3) shown in the table. A message tone beeps while the PTT switch is released.

Battery Case Li-ion Battery Ni-Cd Battery Ni-MH Battery (1) 6.2[V] 6.5[V] 6.2[V] 6.2[V] (2) 7.5[V] 7.1[V] 6.8[V] 7.0[V] (3) 5.9[V] 6.2[V] 5.9[V] 5.9[V]

XOUT

IC805

BSHIFT

IC804

EEPROM

R833

R834

Fig. 12 Low battery warning

IC805

CPU

TK-3168

R608

C608

C619

CIRCUIT DESCRIPTION / INSTALLATION

4) Battery Type Detection

The transceiver automatically detects teh battery type, measuring the resistance between the S-terminal and + terminal on the battery pack and changes the supplied voltage to the S-tarminal as below. The microprocessor then detects the battery type.

Resistor value Battery type Input voltage of S-terminal

1.8MΩ Li-ion 0.3~1.3V 560kΩ Ni-Cd 1.3~2.6V 220kΩ Ni-MH 2.6~5.0V OPEN Battery case 0~0.3V

7. Control System

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

microprocessor directly as shown in fig. 13.

Channel selector

EN1

EN2

EN3

EN4

IC805

CPU

Fig. 13 Control system

PTT

AUXSW

SIDE 1

SIDE 2

PTT

AUX SW

SW1

SW2

INSTALLATION

1. Optional Board

Remove the TX/RX unit from the radio before installing the

optional board in the radio.

The procedure for removing the TX/RX unit is described in the DISASSEMBLY FOR REPAIR section in the Service Manual.

Install the optional board on the back of the TX/RX unit.

For details on installation of the optional board, refer to Installation Information supplied with the optional board.

When installing the optional board, also refer to the chart in TERMINAL FUNCTION section (page 11) given in the Service Manual. Note: To install and use the Scrambler Board, remove “R601”

and “R647” from the front of the TX/RX unit.

R647 R601

R633

C607

R607

R609

C609

C614

617

C618

616

R610

R640

R613

R615

R696

R643

C648

C646

C637

R636

C641

R634

R647

CP803

R839

R840

C645

R629 R631

R835

R628

R642 R641

C642

R632

CP808

R627

C634

R601

C633

C636

C627

C628

R626

R623

C631 C632

C640

C643

C621

C622

CP809

CP810

C625

IC601

C630

R622

R624 R625

R621

C846

R618

C635

R695

1725

R616

L806

C610 C613

L804

C847

VCC

CP812

R855

CP813

R856

TX-RX UNIT (X57-6730-XX) Component side view

TK-3168

TERMINAL FUNCTION

■ CN801

Designation

No.

1 GND GND Vss 2 SB Switched B Output Voltage/7mA load DC (Battery terminal) ±0.5V 3 A3 AUX3 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd 4 TXAFI Transmit AF input Input sensitivity/Impedance (1kHz std. dev.) 280±50mVrms @22kΩ Load 5 A2 AUX2 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd 6 A6 AUX6 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd 7 A1 AUX1 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd 8 A5 AUX5 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd

9 A4 AUX4 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd 10 NC Non connection Non connection 11 5C DC 5V Output Voltage/10mA load 5.0±0.5V 12 DEO Discriminator signal output Output voltage/Impedance (1kHz std. mod.) 280±50mVrms @2.2kΩ Load 13 TXAFI Transmit AF input Input sensitivity/Impedance (1kHz std. dev.) 280±50mVrms @22kΩ Load 14 DEO Discriminator signal output Output voltage/Impedance (1kHz std. mod.) 280±50mVrms @2.2kΩ Load 15 NC Non connection Non connection

16 ALT Sidetone input 17 NC Non connection Non connection

18 NC Non connection Non connection 19 NC Non connection Non connection 20 GND GND Vss

Function Condition Value

Input sensitivity/Impedance (1kHz rated AF power/Vol. MAX)

7 ±3mVrms @22kΩ Load

■ Solder point connection

Designation

MIC_I Mic input Input sensitivity/Impedance (1kHz std. dev.) 7±3mVrms @22kΩ Load MIC_O Mic o utput RA_I Receiver AF input Input sensitivity/Impedance (1kHz rated AF power/Vol. MAX) 75±20mVrms @22kΩ Load RA_O Receiver AF output A1 AUX1 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd

A2 AUX2 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd A3 AUX3 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd A4 AUX4 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd A5 AUX5 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd A6 AUX6 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd SB Switched B Output Voltage/7mA load DC (Battery terminal) ±0.5V GND GND Vss 5C DC 5V Output Voltage/10mA load 5.0±0.5V TXAFI Transmit AF input Input sensitivity/Impedance (1kHz std. dev.) 280±50mVrms @22kΩ Load DEO Discriminator signal output Output voltage/Impedance (1kHz std. mod.) 280±50mVrms @2.2kΩ Load LSDFO Received sub-tone output Output voltage/Impedance (150Hz 15% mod.) 180±50mVrms @2.2kΩ Load ALT Sidetone input Input sensitivity/Impedance (1kHz rated AF power/Vol. MAX) 7±3mVrms @22kΩ Load

Function Condition Value

Output voltage/Impedance (1kHz 15mVrms mic input) 2.6±1.0mVrms @2.2kΩ Load Output voltage/Impedance (1kHz 100mVrms mic input) 90±20mVrms @100kΩ Load

Output voltage/Impedance (1kHz std. mod.) 150±50mVrms @2.2kΩ Load Output voltage/Impedance (1kHz system mod.) 290±50mVrms @100kΩ Load

TK-3168

SEMICONDUCTOR DATA

Microprocessor : M30622MCA7G7GP (TX-RX UNIT : IC805)

■ Pin function

Pin Port No. Name

1 PCTV O APC/BPF control data output. 2 DTMF O DTMF 3NC - NC 4 EEPDAT I/O EEPROM data input/output. 5 EEPCLK O EEPROM Clock 6 BYTE I GND. 7 CNVSS I GND. 8 AUX5 O Option Board 5

9 AUX6 O Option Board 6 10 RESET I CPU reset. 11 XOUT O CPU clock. 12 VSS - GND. 13 XIN I CPU clock. 14 VCC - +5V. 15 NC I NC 16 INT I Battery voltage monitor input Low battery : L 17 RDF/FD I Base Band IC Data input

TCLK/

DTRDI 19 NC - NC 20 LSDVCO O Low speed data output. (VCO) 21 NC I NC 22

LSDTCXO 23 NC I NC 24 BEEP O Beep output. 25 OPTDET I Option detect input 26 NC - NC 27 NC - NC 28 NC - NC 29 AUX4 O Option board port 4 30 AUX2 I/O Option board port 2 31 NC - NC 32 NC - NC 33 TXD I/O Serial data. 34 PTT/RXD I PTT on : L/Serial data. 35 STD I Base Band IC Data input 36 BBDIR O Base Band IC Data output 37 BBCLK O Base Band IC clock output 38 BBDI/O I/O Base Band IC Data input/output 39 NC - NC

TDATA/ 40

DTRCLK 41

DTRLOADN 42 AUX3 O Option board port 3 43 AUX1 O Option board port 1 44 NC - NC 45 NC - NC 46 DSW O APC voltage discharge Switch 47

BEEPSW 48 AFCOUT O AF amp power supply control 49 AFMUTE O RX audio mute 50 NC - NC 51 TX O TX VCO power supply switch TX:L 52 RX O RX VCO power supply switch RX:L

I/O Function

I Base Band IC Data input

O Low speed data output. (TCXO)

O Base Band IC Data output O Base Band IC Data output

O Beep switch.

Pin Port No. Name

53 BSHIFT O Beet shift switch. 54 W/N O W/N switch Wide:L 55 NC - NC 56 APCSW O APC switch output. 57 SAVE O Battery save output. 58 5TC O 5T control output. 59 5RC O 5R control output. 60 VCC - +5V. 61 5MSC O 5M control output. 62 VSS - GND. 63 NC - NC 64 NC - NC 65 NC - NC 66 NC - NC 67 EN4 I CH selector input 4. 68 EN3 I CH selector input 3. 69 EN2 I CH selector input 2. 70 EN1 I CH selector input 1. 71 NC - NC 72 LEDTX O RED LED lights control output 73 LEDRX O GREEN LED lights control output 74 AUXSW I Key input.(Emergency) 75 SIDE1 I Side key 1 input. 76 SIDE2 I Side key 2 input. 77 NC - NC 78 NC - NC 79 SIM1 I Destination select 1. 80 SIM2 I Destination select 2. 81 NC - NC 82 PLLUL I PLL unlock detect input. unlock : L 83 RFCLK O PLL clock output. Latch : L 84 RFDAT O PLL data output. 85 PS O PLL power save output. 86 PLLSTB O PLL strobe output. 87 88 BATT I Battery voltage input. 89 VOX I VOX input. 90 RSSQL I Received signal strength indicator input. 91 ANSQL I Squelch level input. 92 LSDI I Low speed data input (QT/DQT). 93 THM I Thermistor input. 94 AVSS - GND. 95 NC - NC 96 VREF - +5V. 97 AVCC - +5V. 98 NC - NC 99 NC - NC

100 NC - NC

BATTSEL

I/O Function

I Battery distinction input.

COMPONENTS DESCRIPTION

TX-RX UNIT (X57-673X-XX)

Ref. No.

IC201 IC Comparator (APC) IC401 IC FM IF system IC601 IC Audio processor IC602 IC AF AMP IC604 IC VOX AMP IC605 IC AF power AMP IC801 IC Voltage regulator / 5V IC802 IC Voltage detector / Reset IC803 IC Voltage detector / INT IC804 IC EEPROM IC805 IC Microprocessor IC806 IC Flip Flop

Q10 Transistor Ripple filter Q11 Transistor RF AMP

Q12 FET DC switch / RX VCO Q205 Transistor Pre-drive AMP Q206 FET Pre-drive AMP Q207 FET TX Drive AMP Q208 Transistor APC switch Q209 FET APC switch Q210 Transistor APC switch Q211 FET TX Final AMP Q212 FET APC switch Q213 Transistor APC switch Q401 Transistor W/N switch Q402 Transistor IF AMP Q403 FET Mixer Q404 FET RF AMP Q407 FET DC switch Q601 FET AF Mute Q602 FET Beep switch Q603 Transistor DC switch / SP Mute Q604 Transistor DC switch Q605 Transistor MIC AGC Q606 Transistor MIC AGC Q607 Transistor DC switch / SP Mute Q608 FET SP Mute switch Q801 Transistor 5T switch

Q802(1/2) FET 5TC switch Q802(2/2) FET SAVE switch Q803(1/2) Transistor AVR / 5C Q803(2/2) Transistor AVR / 5T

Q804 Transistor 5C switch

Use/Function

IC1 IC PLL system

Q1 Transistor Level shift Q2 Transistor Level shift Q3 Transistor Level shift Q4 Transistor Tripler Q5 FET VCO / RX Q6 FET VCO / TX Q7 Transistor PLL IC f_in AMP Q8 FET DC switch / TX VCO Q9 Transistor RF Buffer AMP

Operation/Condition

TK-3168

Ref. No.

Q805(1/2) Transistor LED switch / Green Q805(2/2) Transistor LED switch / Red

Q806 Transistor AVR / PLLB Q807 Transistor PLLB switch Q808 Transistor 5MS switch Q809 Transistor 5R switch Q810 FET Beet shift switch

D201 Diode TX/RX RF switch D203 Zener diode APC protect D204 Diode ANT switch D206 Diode ANT switch D208 Diode ANT switch D212 Diode ANT switch D401 Diode TX/RX RF switch

D402

D403

D404

D405

D406 D407 Diode Rectifier

D603 Diode Limitter D604 Diode Detector D605 Diode Detector D606 Diode Detector D801 Diode 5M protect D802 LED LED / Red D803 LED LED / Green D805 Diode Reverse protection

Use/Function

Variable

capacitance diode Variable

D10

capacitance diode

D11 Diode Current steering

Variable capacitance diode Variable capacitance diode Variable capacitance diode Variable capacitance diode Variable capacitance diode

Frequency control / RX VCO

Frequency control / TX VCO

Frequency control / RX VCO

Modulation

RF BPF tuning

Operation/Condition

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