Kenwood TK-2206, TK-2202 Service Manual

VHF FM TRANSCEIVER

TK-2202/2206

SERVICE MANUAL

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

Antenna (T90-1036-05): TK-2202(K,M) (KRA-26: Option) TK-2206 (M)

Knob (CH-SELECTOR) (K29-9318-03)

Knob (VOLUME) (K29-9309-03)

Cabinet assy (A02-3852-23)(8CH): TK-2202(K,M) (A02-3851-23)(16CH): TK-2206(M)

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

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

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

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

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

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

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

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

EXPLODED VIEW...............................................20

PACKING ............................................................ 21

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

PC BOARD

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

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

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

KSC-31 / KNB-29N / KNB-30A / KBH-10 ......... 39

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

B51-8677-00 (S) 1246

CONTENTS

TX-RX UNIT (X57-6870-20).......................... 28

Knob (PTT) (K29-9308-03)

TK-2206 : Does not come with antenna. Antenna is available as an option.

Photo is TK-2202.

TK-2202/2206

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-2202 TK-2206

TX-RX Unit Frequency range Remarks

K,M

X57-6870-20 136~174MHz

M LOC : 38.4MHz

IF1 : 38.85MHz

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

License and frequency allocated by FCC

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 136~174

A personal computer (IBM PC or compatible), programming interface (KPG-22), and programming software (KPG-87D) are required for programming. (The frequency, TX power HI/LOW, and signalling data are programmed for the transceiver.)

YES

KRA-22 or KRA-26

Optional antenna

KMC-17 or KMC-21

Speaker microphone

(Option)

5.0W

TK-2202 (K,M) TK-2206 (M)

REALIGNMENT

TK-2202/2206

REALIGNMENT

1. Modes

User mode

PC mode

Clone 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.

Clone mode Used to transfer programming data

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 KPG87D.

from one radio to another.

PC tuning mode

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)

3-3. KPG-22 description

(PC programming interface cable: Option)

The KPG-22 is required to interface the TK-2202/2206 with the computer. It has a circuit in its D-subconnector (25-pin) case that converts the RS-232C logic level to the TTL level.

The KPG-22 connects the SP/MIC connector of the TK-2202/ 2206 to the computer’s RS-232C serial port.

3-4. Programming software description

KPG-87D is the programming software for TK-2202/2206 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-2202/2206 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-87D

Tuning cable (E30-3216-05)

}

MIC

}

3. PC Mode

3-1. Preface

The TK-2202/ 2206 transceivers are programmed using a personal computer, a programming interface (KPG-22) and programming software (KPG-87D).

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-2202/2206 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-2202/ 2206 to PC mode, then attach the

interface cable.

Fig. 1

4. Clone Mode

4-1. 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.

4-2. Example

The transceiver can copy the programming data to one or

more transceivers via RF communication.

The clone master and clone slave/s must be in Clone mode.

4-3. Operation

1. To switch the clone slave/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 Side1(increment channel table) and Side2(decrement channnel table) keys.

TK-2202/2206

REALIGNMENT

4. To switch the clone master 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".

Select the same channel table number as the clone slave/s.

7. Press [PTT] on the clone master to begin data transmission. When the clone slave starts to receive data, the LED will light green. When the clone master finishes sending data, a "confirmation" tone will sound. If data transmission fails while cloning, an "error" tone will sound from the Slave unit.

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

9. When the cloning is successful, the Slave unit's "Scan" and "Key lock" functions will return to their default values (Scan = OFF, Key lock = OFF).

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 "Master Unit" if it is unprogrammed. If [PTT] is pressed, an "error" tone will sound.

• The language used in cloning depends on the "Model type" setting, not the FPU setting. C, C2, C5 and C6 type TK-3207 transceivers will use Chinese. Other types English.

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

• 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 configured as "Disable" before being delivered to the end-user.

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

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

Clone Frequency Table

Operating Frequency Clone Frequency Table

1 136.000 2 138.000 3 140.000 4 142.000 5 144.000 6 146.000 7 148.000 8 150.000

9 152.000 10 154.000 11 156.000 12 158.000 13 160.000 14 162.000 15 164.000 16 166.000 17 168.000 18 170.000 19 172.000 20 174.000

(MHz)

136~174

TK-2202/2206

DISASSEMBLY FOR REPAIR

■ Removing the case assembly from the chassis.

1. Remove the volume knob z and channel knob x.

2. Remove the two screws

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

■ Removing the TX-RX unit from the chassis.

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

2. Remove the eleven screws

3. Remove the fixing bracket

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

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

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 first.

6. Remove the FPC from the flat cable connector

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

fixing the TX-RX unit.

of the SP / MIC.

Ω.

■ 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

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

■ Attaching the battery release lever to the case assembly.

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

Caution : The thin spring (G01-4543-04) should be positioned

above the two tabs of the lever.

2. Tilt the battery release lever slightly forward 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

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.

A thin spring

, so that the

until it snaps into place

Two tabs

A thick spring

Shaft

TK-2202/2206

DISASSEMBLY FOR REPAIR

■ Assembling the battery release lever

1. Place the lever x onto the stopper z.

2. Place the thick spring

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

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

onto the lever.

onto the

■ 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 the positive terminal.

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

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

from the packing z of

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

2. Attach the speaker to the speaker recess of the case assembly

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

Caution: Take care that the speaker lead wire is not caught

4. Press the chassis attach them.

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

. Make sure the speaker is securely inserted.

by the microphone element.

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

and the case assembly together to

TK-2202/2206

DISASSEMBLY FOR REPAIR

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.

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 silver, and the nut of channel knob is gold) Use the following jig when removing the nuts of the volume knob and channel knob.

●

Jig (Part No. : W05-1012-00)

Volume Knob

(Silver)

Channel Knob

(Gold)

TK-2202/2206

CIRCUIT DESCRIPTION

1. Frequency Configuration

The receiver utilizes double conversion. The first IF is 38.85 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.

TX/RX: 136 ~ 174MHz (TK-2202(K,M) TK-2206(M))

ANT

ANT SW

AMP

TX: 136 ~ 174MHz (TK-2202(K,M) TK-2206(M))

TX AMP

MCF

38.85MHz

RX: 174.85 ~ 212.85MHz (TK-2202(K,M) TK-2206(M))

AMP

IF SYSTEM

38.4MHz

X3 multiply

1/2

CF 450kHz

PLL VCO

TCXO

AMP

MIC AMP

12.8MHz

Fig. 1 Frequency configuration

2. Receiver

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

ANT

RF AMP Q205

BPF

ANT SW

TUNE

IC201 IF,MIX,DET

X3 multiply

2nd Local

CF201

TCXO

IC301

AQUA

12.8MHz

Fig. 2 Receiver section

1) Front End (RF AMP)

The signal coming from the antenna passes through the

transmit/receive switching diode circuit, (D103,D104,D105

and D106) passes through a BPF (L214 and L213), and is

amplified by the RF amplifier (Q205).

The resulting signal passes through a BPF (L209 and L211)

and goes to the mixer. These BPFs are adjusted by variable

capacitors (D203,D204,D205 and D206). The input voltage

to the variable capacitor is regulated by voltage output from

the microprocessor (IC405).

2) First Mixer

The signal from the front end is mixed with the first local

oscillator signal generated in the PLL circuit by Q1 to

produce a first IF frequency of 38.85 MHz.

The resulting signal passes through the XF201 MCF to cut

the adjacent spurious and provide the opitimun

characteristics, such as adjacent frequency selectivity.

BPF

TUNE

MIXER Q204

1st Local

AF VOL

MCF

XF201

IC302

AF PA

IF AMP Q203

MIC

3) IF Amplifier Circuit

The first IF signal is passed through a four-pole monolithic crystal filter (XF201) to remove the adjacent channel signal. The filtered first IF signal is amplified by the first IF amplifier (Q203) and then applied to the lF system IC (IC201). The IF system IC provides a second mixer, second local oscillator, limiting amplifier, quadrature detector and RSSI (Received Signal Strength Indicator). The second mixer mixes the first IF signal with the 38.4MHz of the second local oscillator output (TCXO X1) and produces the second IF signal of 450kHz. The second IF signal is passed through the ceramic filter (CF201) to remove the adjacent channel signal. The filtered second IF signal is amplified by the limiting amplifier and demodulated by the quadrature detector with the ceramic discriminator (CD201). The demodulated signal is routed to the audio circuit.

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 IC405, pin 45. When a WIDE (low level) data is received, Q202 turn on. When a NARROW (high level) data is received, Q202 turn off. Q202 turns on/off with the Wide/Narrow data and the IC201 detector output level is switched to maintain a constant output level during wide or narrow signals.

Q203

RX_W/N

(IC405)

L : Wide H : Narrow

AFOUT

Q202

R211

R213

QUAD

IFOUT

C214

IC201 FM IF SYSTEM

CD201

Fig. 3 Wide/Narrow switching circuit

5) Audio Amplifier Circuit

The demodulated signal from IC201 goes to AF amplifier through IC301. The signal then goes through an AF volume control , and is routed to an audio power amplifier (IC302) where it is amplified and output to the speaker.

TK-2202/2206

RECEIVE SIGNALLING

CIRCUIT DESCRIPTION

6) Squelch

Part of the AF signal from the IC enters the FM IC (IC201) 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 (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. 4)

7) Receive Signalling

(1) QT/DQT The output signal from FM IC(IC201) enters the microprocessor(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.

(2) MSK (Fleet Sync) The MSK input signal from the FM IC goes to pin 31 of IC 301. The signal is demodulated by MSK demodulator in IC 301. The demodulated data goes to the CPU for processing.

RECEIVE SIGNALLING

FM IF IC201

IF Amp

BUSY

CPU

IC405

QT/DQT IN

AF CONT

SIGNAL

DTMF

QT/DQT

CLK,DATA, STD,LOADN

IC301

AQUA

IC302

AF PA

Fig. 4 AF amplifier and squelch

(3) DTMF

The DTMF input signal from the FM IC (IC201) goes to

IC301. The decoded information is then processed by the

CPU.

Q306,316

Q303,304,305 SW

2) 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 (D4 and D7 in transmit mode and D5 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 amplified by Q6 and sent to the RF amplifiers.

LPF

PLL DATA

REF OSC

12.8MHz

D4, 7

D5, 9

PLL IC IC1

TX VCO

RX VCO

5kHz/6.25kHz

PHASE

COMPARATOR

5kHz/6.25kHz

BUFF AMP

Q5, 7

T/R SW

CHARGE

PUMP

BUFFER

IC2 1/2

RX TX

Fig. 5 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 C4,R5 and D1 causes the voltage applied to the microprocessor to go low. When the microprocessor detects this condition, the transmitter is disabled, ignoring the push-to-talk switch input signal.

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 2.5,5,6.25 or 7.5kHz.

A 12.8MHz reference oscillator signal is divided at IC1 by a

fixed counter to produce an oscillator (VCO) output signal

which is buffer amplified 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 filtered through a low-pass filter and passed

to the VCO to control the oscillator frequency. (See Fig. 5)

4. Transmitter System

1) Microphone Amplifier

The signal from the microphone passes through the IC301. When encoding DTMF, it is turned OFF for muting the microphone input signal by IC301. The signal passes through the Audio processor (IC301) for the maximum deviation adjustment, and goes to the VCO modulation input.

TK-2202/2206

CIRCUIT DESCRIPTION

IC301

MIC

AGC

LPF

DTMF

IC405

CPU

AQUA

QTVCO

QTTCXO

LPF

Fig. 6 Microphone amplifier

2) Drive and Final Amplifier

The signal from the T/R switch (D101 is on) is amplified by the pre-drive (Q102) and the drive amplifier (Q103) to 50mW. The output of the drive amplifier is amplified by the RF power amplifier (Q106) to 5.0W (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 (D103 and D104) and applied to the antenna terminal.

D103

From

T/R SW

(D101)

PCTV

(IC405)

Q102

Pre-DRIVE

AMP

R127 R128 R129

Q103 Q106

DRIVE

AMP

IC101

(1/2)

POWER AMP

VDD

IC101

(2/2)

D104 ANT

VGVGVD

Fig. 7 Drive and final amplifier and APC circuit

3) APC Circuit

The APC circuit always monitors the current flowing through the RF power amplifier (Q106) and keeps a constant current. The voltage drop at R127, R128 and R129 is caused by the current flowing through the RF power amplifier and this voltage is applied to the differential amplifier IC101(1/2). IC101(2/2) compares the output voltage of IC101(1/2) with the reference voltage from IC405. The output of IC101(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.

The QT,DQT data of the QTVCO Line is output from pin 24 of the CPU. The signal passes through a low pass CR filter,

VCO

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

X1 TCXO

SP out tone, and is then applied to the audio processor (IC301). The signal is mixed with the audio signal and goes to the VCO. TX deviation is adjusted by the CPU.

(3) MSK (Fleet Sync) Fleet Sync utilizes 1200bps and 2400bps MSK signal is output from pin 6 of IC301. And is routed to the VCO. When encoding MSK, the microphone input signal is muted.

5. Power Supply

There are four 5V power supplies for the microprocessor: 5M,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.

LPF

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 (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 input. (6) Transmitting tone and encode data.

1) Frequency Shift Circuit

The microprocessor (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.

4) Encode Signalling

(1) QT/DQT QT,DQT data of the QTTCXO Line is output from pin 28 of the CPU. The signal passes through a low-pass CR filter and goes to the TCXO(X1).

CIRCUIT DESCRIPTION

Q407 Q408

Hi: OFF LOW: ON

Fig. 8 Frequency shift circuit

XOUT

IC405

BSHIFT

TK-2202/2206

7. Control System

Keys and channel selector circuit. The signal from the keys and channel selector are directly

input to the microprocessor, as shown in fig. 11.

Channel selector

PTT

2) Memory Circuit

Memory circuit consists of the CPU (IC405) and an EEPROM (IC406). 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.

IC405

CPU

IC406

EEPROM

Fig. 9 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.

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.

EN1

EN2

EN3

EN4

EN5

IC405

CPU

Fig. 11 Control system

SIDE 1

SIDE 2

SW1

SW2

(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.

Ni-Cd Battery Ni-MH Battery (1) 6.2[V] 6.2[V] (2) 5.9[V] 5.9[V]

R404

IC405

R406

CPU

Fig. 10 Low battery warning

TK-2202/2206

TERMINAL FUNCTION / SEMICONDUCTOR DATA

TERMINAL FUNCTION

■ CN401

Name

No.

1B IB (Battery Voltage) 2SBOSwitched B 3 SP1 I Audio input 4 SP2 O Audio output 5 GND - GND 6 EN1 I Encoder pulse input

I/O Function

SEMICONDUCTOR DATA Microprocessor : 30622MAA-B89GP (TX-RX UNIT : IC405)

■ Pin function

Port Name I/O Function

No.

1 PCTV O APC/BPF control data output 2 DTMF O DTMF/ 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 21 TDATA/DTRCLK O Base band IC data 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 3.6864 MHz (7.3728 MHz/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 TX_W/N O TX Wide/Narrow switch 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 No.

10 EN4 I Encoder pulse input 11 EN5 I Encoder pulse input

No.

53-59 NC - NC

63-64 GND - GND 65-71 NC - NC

78-79 NC - NC

83-87 NC - NC

100 NC - NC

Name

7 EN2 I Encoder pulse input 8 GND - GND 9 EN3 I Encoder pulse input

Port Name I/O Function

44 VCC - +5V 45 RX_W/N O RX Wide/Narrow switch 46 EN5 I Channel selector input 47 EN4 I Channel selector input 48 EN3 I Channel selector input 49 EN2 I Channel selector input 50 EN1 I Channel selector input 51 OPTDET I Headset input detect 52 AF_CONT O Speaker mute

60 VCC - +5V 61 NC - NC 62 VSS - GND

72 LEDTX O Red LED lights control output 73 LEDRX O Green LED lights control output 74 PF1 I SIDE1 key input 75 PF2 I SIDE2 key input 76 SIM1 - GND 77 SIM2 - GND

80 5T_C O 5T control output 81 5R_C O 5R control output 82 5C_C O 5C control output

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

I/O Function

Received Signal Strength Indicator input

COMPONENTS DESCRIPTION

TX-RX UNIT (X57-6870-20)

Ref. No.

IC101 IC Comparator (APC) IC201 IC FM IF system IC301 IC Audio processor IC302 IC AF AMP IC401 IC Voltage regulator/ 5V IC402 IC Voltage regulator/ 5V IC403 IC Voltage detector / Reset IC404 IC Voltage detector / INT IC405 IC Microprocessor IC406 IC EEPROM

Q102 Transistor RF AMP Q103 FET TX Drive AMP Q104 Transistor APC switch Q105 FET APC switch Q106 FET TX Final AMP Q107 Transistor APC switch Q108 FET APC switch Q109 Transistor APC switch Q202 Transistor W/N switch / RX Q203 Transistor IF AMP Q204 FET Mixer Q205 FET RF AMP Q301 Transistor W/N switch / TX Q302 Transistor MIC AGC Q303 Transistor DC switch / SP Mute Q304 Transistor DC switch Q305 Transistor DC switch / SP Mute Q306 FET SP Mute switch Q316 FET SP Mute switch Q401 Transistor LED switch / Red Q402 Transistor LED switch / Green Q403 FET 5T switch Q404 FET 5R switch Q405 Transistor 5C switch Q407 FET Beat Shift switch Q408 FET Beat Shift switch

Use/Function

IC1 IC PLL system IC2 IC VCO 1/2 Divider

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 FET RF Buffer AMP Q7 Transistor DC switch / RX VCO Q8 FET Ripple filter Q9 Transistor RF AMP

Operation/Condition

TK-2202/2206

Ref. No.

D10

D11 Diode Current steering D101 Diode TX/RX RF switch D102 Zener diode APC protect D103 Diode ANT switch D104 Diode ANT switch D105 Diode ANT switch D106 Diode ANT switch D202 Diode TX/RX RF switch

D203

D204

D205

D206 D301 Diode Detector

D302 Diode Detector D303 Diode Isolation D401 Diode 5V Protection D402 Diode Reverse Protection D403 LED LED/ Red D404 LED LED/ Green

ADDITIONAL PCB

Ref. No.

Q901 FET W/N Switch/ TX

Use/Function

D1 Diode Ripple Filter

Variable

capacitance diode Variable

capacitance diode Variable capacitance diode

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

Use/Function

Frequency control / TX VCO

Frequency control / RX VCO

Frequency control / TX VCO

Frequency control / RX VCO

Modulator

RF BPF tuning

Operation/Condition

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