Kenwood TK-5210 K, TK-5210 K2, TK-5210 K3 Service Manual

VHF APCO P25 TRANSCEIVER

TK-5210

B51-8703-00 (S) 658

SERVICE MANUAL

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

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

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

DISASSEMBLY FOR REPAIR ................................ 8

CIRCUIT DESCRIPTION .......................................13

TERMINAL FUNCTION ........................................ 19

SEMICONDUCTOR DATA ................................... 23

COMPONENTS DESCRIPTION ........................... 25

PARTS LIST .......................................................... 27

EXPLODED VIEW................................................. 37

PACKING ..............................................................39

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

ADJUSTMENT ..................................................... 40

PC BOARD

TX-RX UNIT (X57-6820-XX) ........................... 54

SCHEMATIC DIAGRAM....................................... 62

INTERCONNECTION DIAGRAM ......................... 74

BLOCK DIAGRAM ................................................ 75

LEVEL DIAGRAM ................................................. 78

OPTIONAL ACCESSORIES

KNB-31A/32N/33L .......................................... 79

KSC-32 ............................................................. 79

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

Helical Antenna (KRA-22: Option)

Main cabinet (A02-3875-01)

Knob (16CH) (K29-9323-03)

Knob (Volume) (K29-9322-03)

TK-5210 K TK-5210 K2 TK-5210 K3

CONTENTS

Knob (PTT) (K29-9328-02)

Key top (EMG) (K29-9319-03)

Main cabinet (4key) (A02-3877-01)

Knob (16CH) (K29-9323-03)

Knob (Volume) (K29-9322-03)

Knob (PTT) (K29-9328-02)

Key top (EMG) (K29-9319-03)

Main cabinet (DTMF) (A02-3879-01)

Knob (16CH) (K29-9323-03)

Knob (Volume) (K29-9322-03)

Knob (PTT) (K29-9328-02)

Key top (EMG) (K29-9319-03)

Helical Antenna (KRA-22: Option)

Key top (DTMF) (K29-9321-13)

Key top (4key) (K29-9320-03)

TK-5210

GENERAL / SYSTEM SET-UP

Model &

Unit X57-682X-XX

Frequency range Remarks LCD 4-key

DTMF

Destination (Market code)

0-10 0-11 0-12

keypad

K ✓

1st IF:49.95MHz

---

TK-5210 K2 ✓ 136~174 MHz

LOC:50.4MHz

✓✓

K3 ✓✓✓✓

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.

PERSONNEL SAFETY

The following precautions are recommended for person-

nel 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 transceiver 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?

A personal computer (IBM PC or compatible), programming interface (KPG-36), and programming software (KPG-95D) are required for programming. (The frequency, and signaling data are programmed for the transceiver.)

Frequency range (MHz) RF power Type LCD 4-key

DTMF keypad

TX/RX 136~174 5W TK-5120 K No No No

TX/RX 136~174 5W TK-5120 K2 Yes Yes

TX/RX 136~174 5W TK-5120 K3 Yes Yes Yes

YES

KRA-22 or KRA-26

Helical antenna

(Option)

YES

KMC-25

Delivery

TK-5210

REALIGNMENT

1. Modes 2. How to Enter Each Mode

Mode Operation

User mode Power ON

Panel test mode ∗2 Press and hold the [Side3] and [PTT] keys

while turning the transceiver power on and

then release the [PTT] key first.

PC mode Received commands from PC

Panel tuning Press the [Side3] key, in Panel test mode

mode ∗2

Firmware

Press and hold the [Side3] and [PTT] keys

programming mode

while turning the transceiver power on and

then release the [Side3] key first.

Clone mode ∗2 Press and hold the [Side2] and [PTT] keys

while turning the transceiver power on and

then release the [Side2] key first.

Self

programming

Press and hold the [Side2] and [PTT] keys

mode ∗2 while turning the transceiver power on and

then release the [PTT] key first.

Firmware version

Press and hold the [Side3] key

information ∗2 while turning the transceiver power on.

Clock adjustment Press and hold the [Orange] and [PTT] keys

mode ∗2 while turning the transceiver power on and

then release the [Orange] key first.

3. Panel Test Mode (K2 and K3 models only)

Setting method refer to ADJUSTMENT.

4. Panel Tuning Mode (K2 and K3 models only)

Setting method refer to ADJUSTMENT.

User mode

Panel test mode

∗

Firmware version information

∗

Panel tuning mode ∗1

Data programming mode

PC test mode

PC tuning mode

PC mode

Clone mode ∗1

Firmware programming mode

Clock adjustment mode ∗1

Self programming mode ∗1

Mode Function

User mode For normal use.

Panel test mode ∗1 Used by the dealer to check the fundamen-

tal characteristics.

Panel tuning mode ∗1

Used by the dealer to tune the transceiver.

PC mode Used for communication between the

transceiver and PC (IBM compatible).

Data programming Used to read and write frequency data and

mode other features to and from the transceiver.

PC test mode Used to check the transceiver using the PC.

This feature is included in the FPU.

See panel tuning.

Firmware Used when changing the main program of

programming mode the flash memory.

Clone mode ∗1 Used to transfer programming data from

one transceiver to another.

Self programming Frequency, signaling and features write to

mode ∗1 the transceiver.

Firmware version Used to confirm the internal firmware

information ∗1 version.

Clock adjustment Used by the dealer to adjust date and time.

mode ∗1

∗

1 : K2 and K3 models only

∗

2 : K2 and K3 models only

TK-5210

REALIGNMENT

5. PC Mode

5-1. Preface

The transceiver is programmed by using a personal computer, programming interface (KPG-36) and programming software (KPG-95D).

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

5-2. Connection procedure

1. Connect the transceiver to the personal computer with

the interface cable.

2. When the POWER switch on, user mode can be entered

immediately. When PC sends command the transceiver

enter PC mode, and “PROGRAM” is displayed on the

LCD.

When data transmitting from transceiver, the red LED is

lights.

When data receiving to transceiver, the green LED is

lights.

Notes:

• The text message are displayed for K2 and K3 models

only.

• The data stored in the personal computer must match

"Model Name and Market Code", when it is written into

the EEPROM and flash memory.

5-3. KPG-36 description (PC programming interface cable: Option)

The KPG-36 is required to interface the transceiver to the computer. It has a circuit in its D-sub connector (25-pin) case that converts the RS-232C logic level to the TTL level.

The KPG-36 connects the universal connector of the transceiver to the computers RS-232C serial port.

5-4. Programming software KPG-95D description

The KPG-95D is the programming software for the transceiver supplied on a CD-ROM. This software runs under MSWindows 98, ME, Windows 2000 or XP on an IBM-PC or compatible machine.

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

6. Firmware Programming Mode

6-1. Preface

Flash memory is mounted on the transceiver. This allows the transceiver to be upgraded when new features are released in the future. (For details on how to obtain the firmware, contact Customer Service.)

6-2. Connection procedure

Connect the transceiver to the personal computer (IBM PC or compatible) with the interface cable (KPG-36). (Connection is the same as in the PC Mode.)

6-3. Programming

1. Start up the firmware programming software (Fpro.exe).

2. Set the communications speed (normally, 115200 bps)

and communications port in the configuration item.

3. Set the firmware to be updated by File name item.

4. Press and hold the [Side3] and [PTT] keys while turning

the transceiver power on and then release the [Side3] key

first. Then, the orange LED on the transceiver lights and

the baud rate is displayed as follows according to the posi-

tion of the Concentric switch.

A: PROGRAM 115200 bps B: PROGRAM 57600 bps

C: PROGRAM 19200 bps Since the baud rate is normally set to 115200 bps, change the Concentric switch to "A".

5. Check the connection between the transceiver and the personal computer, and make sure that the transceiver is in the Program mode.

6. Press “write” button in the window. When the transceiver starts to receive data, the [PG] display lights.

7. If writing ends successfully, the checksum is calculated and a result is displayed.

8. If you want to continue programming other transceivers, repeat steps 4 to 7.

Notes:

• This mode cannot be entered if the Firmware Programming mode is set to Disable in the Programming software.

• The text message are displayed for K2 and K3 models only.

6-4. Baud rate change

1. Change baud rate by changing the Concentric switch position. The baud rates are assigned to positions of the Concentric switch as follows:

A: PROGRAM 115200 bps B: PROGRAM 57600 bps C: PROGRAM 19200 bps

2. If you press the [Side1] switch (top of left side) while the baud rate (such as “PROGRAM 115200 bps") is displayed, the checksum is calculated, and a result is displayed. If you press the [Side1] switch again while the checksum is displayed, the baud rate (such as “PROGRAM 115200 bps") is redisplayed.

Notes:

• Normally, write in the high-speed mode.

• The text message are displayed for K2 and K3 models only.

Fig. 1

IBM-PC

KPG-36

KPG-95D

TK-5210

REALIGNMENT

7. Clone Mode (K2 and K3 models only)

Programming data can be transferred from one transceiver to another by connecting them via their external universal connectors. The operation is as follows (the transmit transceiver is the master and the receive transceiver is a slave).

The following data cannot be cloned.

• Tuning data

• Embedded message with password

• Model name data

• ESN data

Key guide on the "INPUT PASSWORD" display.

• CNF([A] key): The password confirmation

• DEL([B] key): Delete the least digit from the current pass-

word number

• SET([D] key): Determine the least digit of the password

number

1. Press and hold the [Side2] and [PTT] keys while turning

the transceiver power on and then release the [Side2] key

first. If the Read authorization password is set to the trans-

ceiver, the transceiver displays “CLONE LOCK”. If the

password is not set, the transceiver displays “CLONE

MODE”.

2. When you enter the correct password, and “CLONE

MODE” is displayed, the transceiver can be used as the

cloning master. The following describes how to enter the

password.

• How to enter the password using the keypad (K3 model

only);

If the [D] key is pressed while "CLONE LOCK" is displayed,

the Read authorization password input screen (INPUT

PASSWORD) is displayd.

If one of keys 0 to 9 is pressed while "INPUT PASSWORD"

is displayed, the pressed number is displayed on the LCD.

Each press of the key shifts the display in order to the left.

When you enter the password and press the [A] or [✳]

key, “CLONE MODE” is displayed if the entered pass-

word is correct. If the password is incorrect, “CLONE

LOCK” is redisplayed.

• How to enter the password using the [Side2] and [Side3]

keys (K2 and K3 models);

If the [D] key is pressed while "CLONE LOCK" is displayed,

the Read authorization password input screen (INPUT

PASSWORD) is displayd.

If the [Side2] key or [Side3] key is pressed while "INPUT

PASSWORD" is displayed, the number (0 to 9) flashes on

the LCD. When you press the [D] key, the currently

selected number is determined. If you press the [A] key

after entering the password in this procedure, “CLONE

MODE” is displayed if the entered password is correct. If

the password is incorrect, “CLONE LOCK” is redisplayed.

4. Power on the slave transceiver.

5. Connect the cloning cable (part No. E30-3325-05) to the

universal connectors on the master and slave.

6. Press the [Side1] or [A] key on the master while the mas-

ter displays “CLONE MODE”. The data of the master is

sent to the slave. While the slave is receiving the data,

“PROGRAM” is displayed. When cloning of data is com-

pleted, the master displays “END”, and the slave automatically operates in the User mode. The slave can then be operated by the same program as the master.

7. The other slave can be continuously cloned. When the [Side1] or [A] key on the master is pressed while the master displays “END”, the master displays “CLONE MODE”. Carry out the operation in step 4 to 6.

Notes:

• Can not be cloned if the password (over write password) is programmed to the slave.

•"Model Name and Market Code" must be same to clone the transceiver. However, it may be unable to clone the transceiver depending on the enhanced features settings. (Refer to the FPU for the enhanced features details.)

8. Self Programming Mode

(K2 and K3 models only)

Write mode for frequency data and signaling etc. To be

used ONLY by the authorized service person maintaining the user's equipment. After programming, reset the FPU to the "Self- Programming" disabled mode. Transceivers CANNOT be delivered to the end-user in the self-programming mode.

The following setup items in the channels programmed by

the FPU can be changed using the self-programming mode. The addition of new channel and the deletion of channel that has already been programmed by the FPU cannot be performed using the self-programming mode.

• RX frequency

• TX frequency

• Channel type

• TX mode (When the channel type is selected "MIXED".)

• Channel spacing

• RX signaling

• TX signaling

• RX NAC

• TX NAC

• Talkgroup list number

Note:

The personality will be also changed when the abovementioned items is changed. (Refer to the FPU for the personality details.)

Key guide on the "INPUT PASSWORD" display.

• CNF([A] key): The password confirmation

• DEL([B] key): Delete the least digit from the current pass-

word number

Cloning cable (E30-3325-05)

Fig. 2

TK-5210

REALIGNMENT

No. Setup item Display Remarks

1 Select ZONE [**] -CH *** Zone : 1~50

Zone/Channel ZONE ** -CH [***] CH : 1~250 2 RX frequency RX Freq Receive frequency 3 TX frequency TX Freq Transmit frequency 4 Channel type CH Type ANALOG/APCO/MIXED 5 TX mode TX Mode ANALOG/APCO 6Channel spacing CH Space 25.0kHz/12.5kHz

(When the Channel type is selected "ANALOG" or "MIXED".)

APCO 12.5kHz/12.5kHz (When the Channel type is selected "APCO".) 7 RX Signaling RX Sig Receive QT/DQT 8 TX Signaling TX Sig Transmit QT/DQT 9 RX NAC RX NAC *** 000~FFF (Hexadecimal)

10 TX NAC TX NAC *** 000~FFF (Hexadecimal) 11 Talkgroup list number TG List No. *** 1~250

The setup items for self programming mode are as follows.

Item

Zone-Channel RX Frequency TX Frequency Channel Type TX Mode Channel Spacing RX Signaling TX Signaling

Key

[A] Go to the next item

Zone/ Channel

2.5kHz/5kHz/6.25kHz/ QT/DQT(N)/DQT(I)/OFF

[B]

switching

7.5kHz/1MHz Unused switching

step switching

[C]

Zone/ Channel

1 step down

ANALOG/APCO/MIXED

ANALOG/APCO Channel spacing

Signaling down

down switching(Back) switching(Back) switching(Back)

[D]

Zone/ Channel

1 step up

ANALOG/APCO/MIXED

ANALOG/APCO Channel spacing

Signaling up

switching(Forward) switching(Forward) switching(Forward)

[Side3]

Data

Unused

ON/OFF

Unused

1 step/Standard

writing switching switching

Key operation

Item

RX NAC TX NAC TG List No.

Key

[A] Go to the next item

[B]

Delete the least digit from the current number

Unused

(Press and hold to delete all numbers.)

[C] Unused

TG List

number down

[D] Determine the least digit

TG List

number up

[Side2] Increment a number in the specified digit Unused

[Side3] Decrement a number in the specified digit Unused

Keypad Add a digit to the

Unused

(K3 model only)

current number

• SET([D] key): Determine the least digit of the password number

8-1. Enter to the self programming mode

Press and hold the [Side2] and [PTT] keys while turning the transceiver power on and then release the [PTT] key first. Ignoring whether the Read authorization password is set or not, "INPUT PASSWORD" appears.

If the Read authorization password is not set to the transceiver, "SELF PROG MODE" is displayed on the LCD when the [A] key is pressed while "INPUT PASSWORD" is displayed.

If the password is set to the transceiver, "SELF PROG

MODE" is displayed on the LCD when you enter the correct password while "INPUT PASSWORD" is displayed.

For the password input method, see "7.Clone Mode”

step 3 described on page 5.

Note :

This mode (self programming mode) cannot be set when it has been disabled with the FPU.

8-2. Data Writing

If the [Side3] key is pressed while Zone/Channel mode is displayd, new data is written into memory. "Writing" is displayed while the transceiver is writing data.

TK-5210

REALIGNMENT

●

Self programming mode flow chart

9. Firmware Information Mode

(K2 and K3 models only)

Turn the transceiver ON with the [Side3] key held down.

Then, the version is displayed during holding the [Side3] key.

10.Clock Adjustment Mode

(K2 and K3 models only)

10-1. Flow chart of operation

[Orange] + [PTT] + Power ON Release [Orange]

MINUTE

HOUR

DAY

MONTH

YEAR

[A]

[Side2] and [Side3] keys or [C] and [D] keys

Completion

TX NAC

[A]

RX NAC

[A]

TX signaling

[A]

RX signaling

[A]

[A] [A]

[A]

TX frequency

RX frequency

[A] When the [Side3] key is pressed, new data is written into memory.

[A]

Zone/Channel

[A]

Read authorization password entry (6 digits) [A]

[Side2] + [PTT] + POWER ON Release [PTT]

[TX frequency] : Other than "OFF" [Channel type] : "MIXED"

[TX frequency] : Other than "OFF" [Channel type] : "ANALOG" or "MIXED" [TX mode] : "ANALOG"

[TX frequency] : "OFF"

[TX frequency] : Other than "OFF" [Channel type] : "APCO" or "MIXED" If [Channel type] is set to "MIXED", [TX mode] must be set to "APCO".

[Channel type] : "ANALOG" or "MIXED"

[A] [Channel type] : "APCO"

[TX frequency] : "OFF" [Channel type] : "ANALOG" or "APCO"

[TX frequency] : "OFF" [Channel type] : "APCO" or "MIXED"

[A] [TX frequency] : "OFF"

[Channel type] : "ANALOG"

[A] [Channel type] : "ANALOG"

[A] Talkgroup ID List Amount : 0

[Channel type] : "APCO" or "MIXED"

[Channel type] : "APCO" or "MIXED" Talkgroup ID List Amount must not be 0.

Self programming mode

Input Password

OFF QT

OFF

Zone selection

APCO

Channel selection

Talkgroup list number

[A]

[Side 3]

[B]

DQT N

[B]

DQT I

[B]

[B] [B] [B]

[B]

ANALOG

Channel type

[C]/[D]

APCOANALOG

TX mode

[C]/[D]

Channel spacing

12.5kHz25.0kHz

[C]/[D]

12.5kHz

*1 [Channel type] : "ANALOG" or "MIXED"

*2 [Channel type] : "APCO"

APCO 12.5kHz

[C]/[D]

MIXED

[C]/[D]

OFF QT DQT N

[B]

DQT I

TK-5210

DISASSEMBLY FOR REPAIR

Disassembly Procedure

■ Removing the front case from the chassis.

1. Remove the rear panel with a flat-head screwdriver. Insert the screwdriver between the rear panel (right side) and the chassis (the place next to the """ mark shown on the chassis), push it in the direction of the arrow

1, and

remove the right side of the rear panel. Repeat the above action for the left side of the rear panel 2.

2. Remove the four screws 3 and universal connector cap

3. Lift the battery pack release latch on the bottom of the chassis

5 and remove the chassis from the front case.

Notes:

• Lift the chassis from the front case slowly and carefully. If the chassis is lifted suddenly, the SP/MIC FPC may be pulled and the connector may become damaged.

• Handle the main packing with care. It is likely to collect dust and dirt.

4. Remove the SP/MIC FPC from the CONTROL PCB connector (CN603).

■ Removing the CONTROL PCB (X57-682 B/5) from the chassis.

1. Remove the six screws 7.

2. On the reverse side of the CONTROL PCB

8, remove the

cord ASSY and each FPC from the connectors (CN601, CN604 (K2 and K3 models only), CN752, CN753) of the CONTROL PCB.

■ Removing the TX-RX PCB (X57-682 A/5) from the chassis.

1. Remove the 14 screws 9.

2. Remove the universal connector FPC from the TX-RX PCB

connector (CN7) 0.

3. Insert the two tips of a pair of tweezers into the two holes

in the bottom of the shield plate of the TX-RX PCB, firmly squeeze the tweezers to hold the shield plate, then remove the TX-RX PCB

4. Remove the coaxial cables from the two connectors

(MAIN (CN101), UNIV (CN102)) of the TX-RX PCB @.

Rear panel

""" mark

CN603

Chassis

Battery pack release latch

SP/MIC FPC

Front case

CONTROL PCB

Chassis

CN604

CN601

CN752

CN753

Cord ASSY

CN7

UNIV (CN102)

MAIN (CN101)

TX-RX PCB

Chassis

Universal connector FPC

TK-5210

DISASSEMBLY FOR REPAIR

■ Removing the top panel from the chassis.

1. Remove the volume knob # and channel knob $.

2. Remove the concentric switch knob

3. Remove the volume torque-up packing

^ using a pair of

tweezers.

4. Remove the nuts from the volume knob, channel knob and antenna receptacle.

5. Remove the top panel

Notes:

•Before removing the top panel, set the lever switch to the "-" position (circle painted in white)

• Each of the volume knob, channel knob and antenna receptacle on the top panel has an O-ring. Take care not to lose them after removing the panel.

■ Removing the TOP PCB (X57-682 C/5) from the chassis.

1. Remove the two screws (.

2. Lift the TOP PCB and remove the VOL/CH FPC

) and

CONTROL-TOP FPC

⁄ from the two connectors (CN902,

CN903) of the TOP PCB.

Precautions for Reassembly

■ Installing the VOL/CH FPC and CONTROL-TOP FPC on the TOP PCB

1. Remove the volume 1 and channel switch 2 from the

chassis.

2. Position the coaxial cable connecting the ANT PCB and

TX-RX PCB as shown in the figure below.

3. Pass the coaxial cable

3 of the antenna receptacle

through the round hole of the hardware fixture

4, then

insert it into the coaxial connector (MAIN (CN101)) of the TX-RX PCB.

4. Pass the volume, channel switch, VOL/CH FPC and

CONTROL-TOP FPC through hardware fixture holes, then bring the hardware fixture into contact with the chassis and fix it with a screw

Note:

The projections of the volume and channel switch pedestals must protrude from the square holes of the hardware fixture.

5. Fix the antenna receptacle with the two screws 6.

6. Fix the hardware fixture with a screw

O-ring

CN902

TOP PCB

CN903

CONTROL-TOP

FPC

VOL/CH FPC

The projection of the volume pedestal

The projection of the channel switch pedestal

Aline the coaxial cable connecting the ANT PCB and TX-RX PCB as shown in the figure.

MAIN (CN101)

TK-5210

DISASSEMBLY FOR REPAIR

7. Insert the VOL/CH FPC 8 and the CONTROL-TOP FPC 9

into the connectors (CN902, CN903) of the TOP PCB.

8. Fix the TOP PCB with a screw

9. Fix the TOP PCB with a screw

■ TX-RX PCB Installation Procedure

1. Insert the coaxial cable of the antenna receptacle into the coaxial connector (CN101) of the TX-RX PCB

1 and the

coaxial cable of the ANT PCB into the coaxial connector (CN102) of the TX-RX PCB

2. Grasp both sides of the lower part of the TX-RX PCB, tilt the TX-RX PCB and install the chassis so that the PTT FPC

3, CONTROL-TOP FPC 4 and universal connector FPC 5 are not caught 6.

3. Fix the TX-RX PCB with the 14 screws.

■ LCD ASSY Installation Procedure (K2 and K3

models only)

1. Remove the two adhesive sheets attached to the CONTROL PCB, and attach the new adhesive sheets to the location as shown in the following figure.

2. Fold the LCD ASSY FPC to the back of the holder

1 so

that the FPC is between the two tabs on the right side of the holder

3. Fit the two tabs on the right side of the holder 3 and the

two tabs on the left side of the holder

4 into the

CONTROL PCB.

Note:

Take care that the FPC is not caught when fitting the two tabs on the right side of the holder.

4. Insert the FPC into the CONTROL PCB connector (CN751)

■

Main Packing (G53-1637-04) Installation Procedure

1. Hook the packing (coated with silicon oil) in the upper groove of the chassis

1, then fit the packing into the

lower groove of the chassis

Note:

Ensure that the chassis grooves and packing are free from dirt and dust.

2. Fit the packing into the grooves on both sides of the chassis 3. (Fit the packing into the groove in the chassis by tracing it lightly with your fingers.)

Note:

To remove the packing from the chassis groove, use a resin adjustment bar or other such device. If the packing is pried with a sharp metallic tool, such as tweezers, the packing may become damaged.

3. Verify that the packing fits snuggly into the groove of the chassis.

CN902

CN903

CN102

CN101

Grasp both sides of the lower part of the TX-RX PCB

LCD ASSY FPC

tab

CN751

Main packing

tab

CONTROL PCB

Adhesive sheet

(J99-0394-04)

Adhesive sheet

(J99-0393-04)

CONTROL PCB

TK-5210

2. Tighten the two screws from the TX-RX PCB side.

3. Firmly tighten the hexagon screws of the GND terminal.

Installation Procedure during Parts Replacement

■ Attaching the Sheet (G10-1338-04, J99-0383-14)

to the Front Case Speaker and Installation of the Packing (G53-1633-04)

1. Attach a new fiber sheet 1 (G10-1338-04) so that its

convex fits the hollow of the front case

2. Attach a new pressure sensitive adhesive sheet

3 (J99-

0383-14) so that its convex fits the hollow of the front case 4.

3. Remove the separation sheet from the pressure sensitive

adhesive sheet with a pair of tweezers 5.

4. Fit the packing

6 (G53-1633-04) into the front case

speaker.

Note:

Fit the packing into the hollow of the case so that the two low-height places in the convex of the packing are positioned on the lower side

5. Verify that the packing does not ride on the rib of the case.

DISASSEMBLY FOR REPAIR

■ Top Packing (G53-1638-04) Installation Procedure

1. Ensure that the hardware fixture is first secured to the chassis.

2. Hook the packing (coated with silicon oil) in the upper left groove of the chassis

1, then fit the packing into the right

groove of the chassis.

Notes:

• Verify that the chassis grooves and packing are free from dirt and dust.

• To remove the packing from the chassis groove, use a resin adjustment bar or other such device. If the packing is pried with a sharp metallic tool, such as tweezers, the packing may become damaged.

3. Verify that the packing fits snuggly into the groove of the chassis.

■ Volume Torque-up Packing (G53-1628-04) Installation Procedure

Insert the packing using a pair of tweezers so that the hollow of the packing fits the convex of the panel

■ Screw sequence for mounting the battery terminal block to the chassis.

Attach the battery terminal block to the chassis as described in the following procedure.

1. Loosely fix the hexagon screws of the GND terminal to the chassis (enough so that the hexagon screws do not move).

Top packing

Hardware fixture

Volume torque-up packing

GND terminal

Two screws

4 5

TK-5210

■ Installing a new LCD ASSY to the holder (K2 and K3 models only)

1. Remove the separation paper (brown) from the new sheet

1 2, and attach the sheet to the surface of the holder 3.

2. Remove the protection sheets attached to both sides of

the new LCD ASSY.

3. Remove the separation paper (white) from the sheet in

step 1

4, then attach the LCD ASSY 5 to the sheet.

4. Attach two pieces of double-sided adhesive tape

6 to the

back of the holder and remove the separation paper.

5. Remove the protection sheet (transparent) attached to

one side of the new filter

7 8 and remove the protection

sheet (yellow) from the other side

6. Attach the filter from step 5 to the back of the holder.

7. Attach the new cushion 0 so that it fits to the corner of

the holder convex.

■ Preparation when Replacing the Cord ASSY (X42-3270-10)

Cut the tip of the FPC on the side on which "TX-RX" is stamped when replacing the cord ASSY.

CUT

TX-RX

CONT

Cord Assy(X42-3270-10)

■ Procedures when Replacing the Top Panel

1. Insert the O-ring 1 into the lever switch part of the new

top panel.

2. Apply grease to the base of the shaft of the lever knob 2

and install the lever knob so that it is in the "-" position (circle painted in white) on the top panel

3. Pass the hardware fixture

4 through the shaft and install

it onto the top panel.

4. Apply grease to between the two holes in the hardware fixture

5. Install the hardware fixture

5 so that it is inserted into the

hole on the left side of the hardware fixture

6. Fix the two hardware fixtures with the hexagon nut

7. Apply bond (Three Bond 1401C) to the tip of the lever knob shaft and the surface of the hexagon nut

■ Volume Knob and Channel Knob Parts Replace-

ment

Since the volume knob consists of two components, a knob

1 and a spacer 2, replace and reinstall these two

parts at the same time. Since the channel knob consists of three components, a knob

3, a 16CH display seal 4 and a spacer 5, replace

and reinstall these three parts at the same time.

Apply grease to between the two holes in the hardware fixture.

Apply bond (Three Bond 1401C) to the tip of the lever knob shaft and the surface of the hexagon nut.

Top panel

Inserted into the hole on the left side of the hardware fixture.

Apply grease to the base of the shaft of the lever knob.

Volume Knob Channel Knob

DISASSEMBLY FOR REPAIR

TK-5210

CIRCUIT DESCRIPTION

1. Overview

This transceiver is a VHF/FM/APCO portable transceiver designed to operate in the frequency range of 136 to 174MHz.

The unit consists of receiver, transmitter, phase-locked loop (PLL) frequency synthesizer, base band parts, power supply, and control circuits.

2. Frequency Configuration

The receiver is a double-conversion superheterodyne using first intermediate frequency (IF) of 49.95MHz and second IF of 450kHz. Incoming signals from the antenna are mixed with the local signal from the PLL circuit to produce the first IF of 49.95MHz.

This is then mixed with the 50.4MHz second local oscillator output to produce the 450kHz second IF. This signal is detected to give the demodulated signal in the DSP.

The transmit signal frequency is generated by the PLL VCO, and modulated by the signal from the DSP. It is then amplified and fed to the antenna.

3. Receiver System

3-1. Front-end RF Amplifier

The signal is passed through an antenna matching coil, where the high-frequency components are amplified by a GaAs FET(Q202). The signals are then fed into band-pass filter that uses varactor diode tuning to reject unwanted signal components, and is fed to the 1st mixer.

3-2. 1st Mixer

The 1st mixer uses the GaAs IC (IC202). The 1st mixer mixes the signal with the 1st local oscillator frequency from the VCO, and converts it to the 1st IF (49.95MHz).

The signal then passes through monolithic crystal filter (XF201) to remove unnecessary nearby frequency components. The signal from the MCF is used as the 1st IF signal.

3-3. IF Amplifier

The 1st IF signal is amplified by the IF amplifier (Q204) and fed into the FM IC (IC204). The IF signal is then mixed with the 2nd local oscillator frequency of 50.4MHz to generate the

Fig. 1 Frequency configuration

ANT

TX/RX : 136~174MHz

ANT

AMP

1st MIX

MCF

VCXO

49.95MHz

450kHz

MIX

IF AMP

AMP

16.8MHz

50.4MHz

185.95~

223.95MHz

136~174MHz

PLL

VCO

FPGA

A/D D/A

DSP

MIC

AMP

MIC

2nd IF of 450KHz. The 450KHz signal is then passed through a ceramic filter (CF201) and fed back into IC204 for additional amplification.

3-4. Wide/ Narrow/ APCO Switching Circuit

Narrow and Wide and APCO settings can be made for each channel by switching the ceramic filters CF203 (Wide), CF204 (Narrow), CF202 (APCO).

The Wide and Narrow and APCO data is output from pin54 (WN) and pin55 (VN) of CPU (IC5).

When a Wide data (VN : low level, WN : high level) is received, the 450KHz signal is passed through a ceramic filter (CF203). When a Narrow data (VN : low level, WN : low level) is received, the 450KHz signal is passed through a ceramic filter (CF204). When a APCO data (VN : high level, WN : high level) is received, the 450KHz signal is passed through a ceramic filter (CF202).

If the 450kHz signal is a FM signal(Wide, Narrow), the signal is detected by a ceramic discriminator (CD201). AF signal is fed to CODEC(IC406), the AF level is adjusted and it is output from 15pin of IC406. Q209 turns on/off with the Wide/Narrow data and the IC204 detector output level is changed to maintain a constant output level during Wide or Narrow signals.

If the 450kHz signal is an APCO signal, the signal is prepared by the buffer amplifier (IC208) and fed to FPGA (IC13). The APCO signal is A/D-converted by the FPGA and DSP (IC8), and is performed APCO demodulation.

The AF signal is output from 15pin of CODEC (IC406).

1st Local OSC

BPF BPF BPF

1st

LNA MIXER

Q202L201

TUNE

L204 L205 IC202

MCF

XF201

49.95MHz

IF AMP

Q204

Q205

2nd Local OSC

FM IC

IC204

Tripler

CF201

BPF

L202

X201

16.8MHz

VCXO

WN WN

VNVN

CF203

CF204

CF202

APCO

Narrow

Wide

IC203

IC205

IC206

IC207

CF201

16.8MHz

VCXO

X201

Q205

50.4MHz

49.95MHz

450kHz

IC204

FM IC

DET

APCO

CD201

VN WN

HLWide

Narrow

APCO

Filter

Fig. 2 Receiver section

Fig. 3 Wide/Narrow/APCO switching circuit

TK-5210

CIRCUIT DESCRIPTION

3-5. Audio Amplifier Circuit

• AF signal

The AF signal from CODEC (IC406) is amplified by IC407

and goes through IC408.

The AF signal goes through a DAC (IC411), an AF amplifier (IC603), and an AF switch (IC604), and is routed to audio power amplifier (IC601), where the signal is amplified and output to the internal speaker.

•Audio circuit

CODEC (IC406) extracts the audio signal from the receive signal in the detection circuit in FM mode. The signal is then deemphasized and output as a decoded audio signal in APCO mode.

LPF (IC407) removes quantization noise from the audio signal output of the CODEC.

The switch (IC408) stops the audio signal of the CODEC to prevent the mixing of BEEP, voice announcement and audio signal when the BEEP or voice announcement is output from the CPU. If an optional scrambler board is installed, the audio path is adjusted so that the audio signal goes through the scrambler board.

DAC (IC411) controls the voltage amplitude level of the audio signal according to the volume position of the transceiver. This determines the volume level output from the speaker.

The amplifier (IC603) amplifies the audio signal so that the audio signal level at the final stage amplifier is appropriate.

The volume levels of the 8Ω internal speaker and 16Ω external speaker are matched using the EXT AFC.

The switch (IC604) adjusts the signal path so that the audio signal is output to the audio amplifier (IC602) for external speakers when optional external speakers are connected. If no external speakers are connected, the audio signal is output to the audio amplifier (IC601) for the internal speaker.

IC601 and IC602 output is BTL (Bridge Tied Load).

• AF control

Speaker switching is performed by the CPU (IC5) using INT AFC or EXT AFC. First, the logic level at the speakers switching terminal (SSW) on the universal connector is fed to the CPU. The CPU then outputs data based on this input.

When there is no SP-MIC installed, this logic level becomes high. When the INT AFC is high, the EXT AFC goes low, so the AF signal is only fed to the amplifier for the internal speaker (INT SP) of IC601.

However, when a SP-MIC has been connected, this logic level becomes low, so the INT AFC goes low and the EXT AFC goes high. In this case, the AF signal is fed only to amplifier for the external speaker (EXT SP) of IC602.

3-6. Squelch Circuit

It amplifies the demodulated noise signal from FM IC (IC204) after filtering through BPF circuit. Then, the amplified signal is converted to DC signal by the detection circuit. The converted signal is fed to the CPU (IC5).

4. Transmitter System

4-1. Audio Band Circuit

The audio band circuit of the transmitter system consists of the following:

• Microphone (Main)

• Microphone (Sub)

• N/C amplifier (Noise canceling mic amplifier) (IC603)

• Switch (Int/ext) (Q410)

• Switch (Mic mute) (Q406)

• AGC (IC405, D402, D403)

• Switch (Scrambler board) (Q407)

This transceiver has two types of microphones: main and sub. The main microphone is located at the front of the cabinet and the sub microphone is located at the rear of the cabinet. The audio signal input from these microphones is synthesized by the N/C amplifier (IC603). The audio signal from the main microphone is synthesized in normal phase and the audio signal from the sub microphone is synthesized in opposite phase. So if the same audio signal is applied in the same phase to the main and sub microphones, it is cancelled by the N/C amplifier. If audio signal is input to only the main or sub microphone, it is not cancelled, but output from the N/C amplifier.

This prevents ambient noise from entering the audio band circuit at the next or subsequent stages.

When an optional external speaker microphone is installed, the Int/ext switch (Q410) cuts off the audio signal from the main and sub microphones and sends only the audio signal from the external microphone to the next stage.

The microphone mute switch (Q406) cuts off audio signals from the main, sub and external microphones.

AGC (IC405, D402, D403) is an amplifier that reduces gain automatically by greatly increasing the attenuation when the audio signal of a certain level or higher is present. It controls the gain so that the audio signal input to the CODEC (IC406) is not clipped.

If an optional scrambler board is installed, the switch

Fig. 4 Audio circuit diagram

Fig. 5 Squelch circuit

IC403

LPF AMP

Q412

Noise AMP

D404

DET

IC5

CPU

BEEPS/ SCSW

TX-RX (X57-682 A/5) CONTROL (X57-682 B/5)

BEEP/ voice announce

EXT AFC EXT AFC

INT SP

IC406 CODEC

IC407 LPF

IC411 DAC

IC603 AMP

IC604 SW

universal connector EXT SP

Scrambler board

IC8 DSP

INT AFC

IC601 AMP

IC602 AMP

IC408 SW

TK-5210

CIRCUIT DESCRIPTION

(Q407) adjusts the signal path so that the audio signal is input to the CODEC through the scrambler board.

The audio signal is input to the CODEC (base band circuit)

through the above path.

4-2. Base Band Circuit

The base band circuit of the transmitter system consists

of the following:

• CODEC (IC406)

• DSP (IC411)

• LPF (IC407)

• Buffer (IC409)

• DAC (IC411)

•Amplifier (IC412)

The audio signal output from the base band circuit is converted to digital data of a sampling frequency of 48 kHz and a quantization resolution of 16 bits by the CODEC (IC406). This digital data is sent to the DSP (IC8), and voice signals of 300 Hz or lower and frequencies of 3 kHz or higher are cut off and an audio range 300 Hz to 3 kHz is extracted.

The audio signal is then pre-emphasized in FM mode and synthesized with the signals, such as QT and DQT, as required, and is then output from the CODEC. In APCO mode, the audio signal is converted to the C4FM base band signal and output from the CODEC. The DTMF and MSK base band signals are also generated by the DSP and output by the CODEC.

LPF (IC407) removes quantization noise from the base band signal output from the CODEC.

The buffer (IC409) sets the base band signal level to the DAC input range.

The DAC (IC411) assigns the base band signal to the VCO (Q311) and VCXO (X301).

At this time, the level output according to the transmit carrier is fine-adjusted according to the modulation method of FM Wide, FM Narrow and APCO.

4-3. Transmit Signal Amplification Circuit

(From T/R switch to Final amplifier)

The transmit signal passing through the T/R switch (D101) is amplified to approx. 50 mW by the two transistor amplification circuits (Q101, Q102). The transmit signal output from Q102 passes through a 3dB attenuator to improve high-frequency signal matching is amplified by the drive amplifier (Q103) and applied to the final amplifier (Q105). The signal applied to the final amplifier is amplified by the final amplifier so that the antenna output is 5 W (1 W for Low Power).

4-4. High-Frequency Signal Switch Circuit

(From Antenna switch to ANT output)

The transmit signal output from the final amplifier (Q105) passes through the antenna switch (D106, D107) and LPF, and goes into the SPDT switch (IC102, IC103) which changes the antenna connector (CN101) and the universal connector (CN102).

The transmit signal passing through the output change switch passes through the surge protection HPF and spurious removing LPF and then goes to the antenna connector (CN101) or the universal connector (CN102), specified by the SPDT switch (IC102, IC103).

4-5. APC Circuit

The APC circuit detects the current of the drive amplifier (Q103) and final amplifier (Q105) during transmission and controls the output power by controlling the current.

It detects the current using R119 and R120 and applies a drop voltage between both resistors during transmission to APC (IC101). It controls the transmission current of the drive amplifier and final amplifier so that it is constant by comparing this current with the reference voltage output from pin 7 of IC104. The reference voltage input to pin 5 of IC104 is output from the DAC (IC411). High/Low power output is set according to the DAC output voltage.

4-6. Temperature Protection Circuit

The temperature protection circuit reduces the APC voltage when the temperature of Q105 rises, to prevent thermal destruction of the final amplifier (Q105). The CPU

Fig. 6 Audio band and Base band circuit

Fig. 7 Transmitter circuit

MIC(MAIN)

EXT.MIC

MIC(SUB)

MSW/CTS MM

IC603

Q410SWQ406

AGC-AMP IC405 LPF

D402,D403 DET

Scrambler board

SCSW

MIC

N/C AMP

IC411 DAC

Q407SWIC8

DSP

IC406 CODEC

IC407 LPF

IC409 BUFF

IC412 AMP

X301 VCXO

Q311 VCO

D101 T/R SW

Q103

Drive Amp

Q105

Final Amp

D106,D107

ANT SW

IC101 APC

R119+BR120

APC SW

Q101 Pre Pre Drive Amp

Q102 Pre Drive Amp

3dB

Attenuator

IC102,IC103

SPDT

CN101

CN102

LPF

(IC5) detects the temperature with a thermistor (TH101) to control the reference voltage to the APC circuit.

TK-5210

CIRCUIT DESCRIPTION

5. PLL Frequency Synthesizer

The PLL Frequency Synthesizer consists of the following

components:

• VCXO (X301)

• VCO (Q310, Q311)

• Rheostat (IC414)

• PLL IC (IC303)

• 1/2 divider (IC304)

• Local switch (D101, D210)

5-1. VCXO (X301)

VCXO (X301) generates a reference frequency of 16.8

MHz for the PLL frequency synthesizer. This reference frequency is applied to pin 8 of the PLL IC (IC303).

The VCXO oscillation frequency is fine-adjusted by

controlling the voltage applied to pin 1 of the VCXO with DAC (IC411). It is also controlled with pin 1 of the VCXO if the output from VCXO is modulated.

5-2. VCO

There is a RX VCO and a TX VCO. The TX VCO (Q311) generates a transmit carrier and the

RX VCO (Q310) generates a 1st local receive signal.

For the VCO oscillation frequency, the transmit carrier is

272 to 348 MHz and the 1st local receive signal is 371.9 to

447.9 MHz. The VCO oscillation frequency is determined by one

system of operation switching terminal "T/R" and two systems of voltage control terminals "C/V" and "V-assist".

The operation switching terminal, "T/R", is controlled by

the control line (T/R) output from the CPU (IC5). When the T/ R logic is low, the VCO outputs the transmit carrier and when it is high, it outputs a 1st local receive signal.

The voltage control terminals, "CV" and "V-assist", are

controlled by the PLL IC (IC303) and rheostat (IC414) and the output frequency changes continuously according to the applied voltage. For the modulation input terminal, "MOD", the output frequency changes according to the applied voltage. This is used to modulate the VCO output. "MOD" works only when "T/R" is low.

5-3. Rheostat (IC414)

The rheostat (IC414) is connected to the VCO voltage

control terminal, "V-assist", and quickly controls the VCO oscillation frequency. However, its accuracy is low and the VCO frequency cannot be matched accurately with the desired transmit carrier or the 1st local receive signal.

The rheostat is controlled by the CPU (IC5) through the 3-

line "PCS", "DAT", "CLK" serial bus.

5-4. PLL IC (IC303)

PLL IC compares the differences in phases of the VCO

oscillation frequency and the VCXO reference frequency, returns the difference to the VCO CV terminal and realizes the "Phase Locked Loop" for the return control. This allows the VCO oscillation frequency to accurately match (lock) the desired frequency.

When the frequency is controlled by the PLL, the

frequency convergence time increases as the frequency

difference increases when the set frequency is changed. To supplement this, the rheostat is used before control by the PLL IC to bring the VCO oscillation frequency close to the desired frequency. As a result, the VCO CV voltage does not change and is always stable at approx. 2 V.

The desired frequency is set for the PLL IC by the CPU (IC5) through the 3-line "LE", "DAT", "CLK" serial bus. Whether the PLL IC is locked or not is monitored by the CPU through the “UL” signal line. If the VCO is not the desired frequency (unlock), the "UL" logic is low.

5-5. 1/2 divider (IC304)

The 1/2 divider (IC304) inputs the transmit carrier and the 1st local receive signal output from the VCO and divides each frequency by 1/2. The frequency divided by 1/2 becomes a carrier that is actually sent and a 1st local receive signal that is actually input to a mixer. (Both the VCO and the PLL IC operate with double frequencies in phase locked loops.)

5-6. Local Switch (D101, D210)

The connection destination of the signal output from the 1/2 divider (IC304) is changed with the diode switch (D101) that is controlled by the transmission power supply, 5T, and the diode switch (D210) that is controlled by the receive power supply, 5R.

If the 5T logic is high, it is connected to a send-side prepre-drive (Q101). If the 5T logic is low, it is connected to a receive-side mixer (IC202).

6. Control Circuit

The control circuit consists of CPU (IC5) and its peripheral circuits. It controls the TX-RX unit and transfers data to the Control unit. IC5 mainly performs the following;

1) Switching between transmission and reception by PTT

signal input.

2) Reading system, zone, 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 decode data input.

6) Transmitting tone and encode data.

6-1. Memory Circuit

Memory circuit consists of the CPU (IC5) and a flash memory (IC6). A flash memory has a capacity of 16M bits and

Fig. 8 PLL block diagram

T/R

IC414

V-assist

TX: 272~348MHz RX: 371.9~447.9MHz

RHE

PCS DAT CLK

LE DAT CLK

IC304 Q314 D101

to pre-pre-drive

LPF VCO

1/2 BUFF SW

UL CV

IC5

IC303 Q312 D210

to 1st mixer

(Q101)

(IC202)

CPU

PLL

LPF

BUFF SW

MOD

X301 IC411

VCXO DAC

TK-5210

CIRCUIT DESCRIPTION

contains the transceiver control program for the CPU. It also stores the data for transceiver channels and operating parameter that are written by the FPU. This program can be easily written from an external devices.

The EEPROM (IC2) stores the last channel data, the scan

on status, and other parameters.

■ Flash memory

Note : The flash memory stores the data that is written by

the FPU (KPG-95D), and firmware program (User mode, Test mode, Tuning mode, etc.). This data must be rewritten when replacing the flash memory.

■ EEPROM

Note : The EEPROM stores tuning data (Deviation, Squelch,

etc.). Realign the transceiver after replacing the EEPROM.

■ Real-time clock

The clock function is based on real-time clock IC (IC1). When the power supply is off, it is backed up by an internal secondary lithium battery

6-2. LCD (K2 and K3 models only)

The LCD is controlled using the bus lines on the connector (CN604) of the control unit (X57 B/5).

It corrects the LCD contrast voltage using IC704. The voltage corresponding to the temperature is sent to pin 3 of IC704 from the CPU (IC5) according to the temperature measurement results using a temperature IC (IC4).

6-3. Temperature Detection Circuit

The temperature detection circuit detects the temperature using a temperature IC (IC4) and corrects the thermal characteristic change of the squelch or LCD.

6-4. Key Detection Circuit

Keys are detected using three shift registers (IC701,

IC702, IC703).

The KIN signal that is normally pulled down goes high

when any key is pressed.

6-5. Low Battery Warning

The battery voltage is divided using R15 and R16 and is detected by the CPU (IC5). When the battery voltage falls below the voltage set by the Low battery warning adjustment, the red LED blinks to notify the operator that it is time to replace the battery. If the battery voltage falls even more (approx. 5.8V), a beep sounds and transmission stops.

Low battery warning Battery condition

The red LED blinks during The battery voltage is low but

transmission. the transceiver is still usable.

The red LED blinks and The battery voltage is low and

the warning tone beeps while the transceiver is not usable to

the PTT switch is pressed. make calls.

6-6. VOX

The VOX function can be used only with an external microphone.

The VOX (Voice Operated Transmission) function detects voice input to the microphone and automatically switches between transmission and reception. However, if a scrambler board is installed (Extended Function Voice Scrambler is selected with FPU), VOX does not operate.

If the microphone input exceeds a certain level, transmission automatically begins. If the input falls below a certain level, the transceiver automatically returns to receive mode.

The TK-5210 realizes this function using DSP (IC8).

6-7. DSP

The DSP circuit consists of a DSP (IC8), a CODEC (IC406) and processes the base band signal. The DSP operates on an external clock of 9.216MHz (the same as the CPU), the I/O section operates at 3.3V and the core section operates at

1.5V. The DSP carries out the following processes:

• C4FM encoding

• Analog FM pre-emphasis/de-emphasis

• Vocoder (IMBE) processing between audio codec and

modulation/demodulation

• CAI processing, such as error correction encoding

• QT/DQT encoding/decoding

• DTMF encoding/decoding

• MSK encoding/decoding

• 2-tone decoding

• Compressor/expander processing

• Transmit/receive audio filtering processing

• VOX processing

• Microphone amplifier AGC processing

• Audio mute processing

•Modulation level processing

Fig. 9 Memory circuit

CPU

EEPROM

FLASH

IC5

IC6

IC2

Fig. 10 Clock diagram

IC406

CODEC

IC13

FPGA

IC8

DSP

IC5

CPU

IC14

(2/3,3/3)

9.216MHz

18.432MHz

IC12

VCXO

IC14 (1/3)

TK-5210

CIRCUIT DESCRIPTION

6-8. FPGA

The FPGA(IC13) I/O section operates at 3.3V. and the core section operates at 2.5V. The FPGA has the following function.

• Demodulation (C4FM,CQPSK)

• Shift register(8CH)

• Level convert Buffer amplifier(5V➝3.3V)(9CH)

• Generates 1.536MHz for the demodulation and CODEC.

7. Power Supply Circuit

The battery voltage (+B) is provided from the battery terminal on the TX-RX unit (X57 A/5).

The battery voltage passes through a 3A fuse (F401) and goes to the VDD terminal of the DC/DC converter (IC805).

The +B voltage is detected by the voltage detection IC (IC804). If the voltage is 5.6 V or higher, the IC805 CE pin becomes high and the DC/DC converter begins.

The IC805 output voltage (3.6V) becomes a power supply for five regulators (IC801, IC802, IC803, IC806, IC807).

The output from IC805 controls the CE pin of IC801, IC802, IC803, IC806, IC807 by turning the VOL SW ON/OFF.

The CPU, DSP and FPGA start with the above five regulators. After the CPU starts, two regulators (IC401, IC402) begin operating with the PWR and 5CC signals output from the CPU.

When the Power SW (Q415) is turned ON by the PWR signal, the 15V DC/DC converter (IC808) is activated. IC807, IC402, IC401 VDD is provided by +B.

The output from IC401 is switched to 5R that is turned ON in receive mode and 5T that is turned ON in transmit mode via CPU control. Output from IC807 includes two voltages: 5M that is always 5 V and 5MCS that is turned ON when an option is installed on the universal connector.

Fig. 11

8. Signaling Circuit

8-1. Encode (QT/DQT/DTMF/MSK)

Each signaling data signal of QT, DQT, DTMF and MSK is generated by the DSP circuit, superposed on a modulation signal and output from pin 16 of the CODEC (IC406).

The modulation balance of the QT/DQT signal is adjusted by the D/A converter(IC411) and the resulting signal is routed to the modulation input of the VCO and VCXO (X301).

The each deviation of the TX QT, DQT, DTMF and MSK tone is adjusted by changing the output level of the CODEC and the resulting signal is routed to VCO and VCXO. The RX DTMF tone is output from pin 15 of the CODEC, passes through the receive audio signal system, and is output from the speaker.

8-2. Decode (QT/DQT/DTMF/2-tone/MSK)

The audio signal is removed from the FM detection signal sent to the DSP circuit and the resulting signal is decoded.

9. Compander Circuit

The term “compander” means compressor and expander. The compander reduces noise by utilizing a compressor and an expander.

The TK-5210 contains DSP(IC8) to perform this operation. The TK-5210 compander can be turned on or off using the FPU.

CPU, FlashROM,

EEPROM, VCXO,

FPGA (I/O)

DSP (I/O)

DSP Core

FPGA Core

LCD VCO

Drive, Final AMP

DC/DC, AVR

3.6V

IC805

DC/DC

IC804

Detect

3A Fuse

Batt

5MCS

33M

33A

15D

2.5D

15V

5CC

5RC

5TC

5MC

S36M

PWR

Q415

Power

IC5

CPU

VOL

PWR

IC801

AVR IC

Q402 5R SW

Q401 5T SW

Q402 5R SW

IC802

AVR IC

IC803

AVR IC

IC806

AVR IC

IC402

AVR IC

IC401

AVR IC

IC807

AVR IC

IC808

RTC

28M

IC606

DC/DC

AVR IC

TK-5210

TERMINAL FUNCTION

TX-RX unit (X57-6820-XX A/5)

Name I/O Function

No.

Name I/O Function

No.

CN7

1 DSR I Data set ready

2E -GND

3 RXD I Serial data input

4 TXD O Serial data Output

55M -5V

6 RTS1 O Request to Send

7 REM I Programmable function key input

8 PTT I External PTT input

9MICE - External MIC GND

10 EMC I External MIC input

11 MSW/CTS I EXT/INT MIC switch input

12 SP- O BTL output - for external speaker

13 SP+ O BTL output + for external speaker

14 SSW I EXT/INT speaker switch input

CN14

1 OPT1 O

Scramble code output 1 (Scrambler board)

O Channel busy (ANI board)

I Busy (VGS-1)

2 OPT3 O

Scramble code output 2 (Scrambler board)

I Key (ANI board)

I Play (VGS-1)

3 RXD1 I Serial data intput(VGS-1)

4 TXD1 O PTT (Scrambler board)

O Serial data output (VGS-1)

5NC-No connection

6 OPT4 I/O Echo PTT (Scrambler board)

O PTT (ANI board)

O Enable (VGS-1)

7 USEL - GND

8 OPT5 O

Scramble code output 4 (Scrambler board)

O Emergency (ANI board)

O Reset output(VGS-1)

9 DGND - GND

10 AGND - GND

11 AI I VGS Audio Input (VGS-1)

12 AO O VGS Audio Output (VGS-1)

13 AGND - GND

14 5A - 5V

15 STON I Side tone input(ANI board)

16 DI/ANI I Data input (ANI board)

17 TCONT I Speaker mute signal (ANI board)

18 MAN DOWN O Man-down output (ANI board)

19 INH I MIC mute signal input (ANI board)

20 OPT2 O Scrambler control signal output

(Scrambler board)

I Emergency signal input (ANI board)

21 TXO O MIC signal output (Scrambler board)

22 RXEO O Audio signal output (Scrambler board)

23 RXEI I Audio signal input (Scrambler board)

24 TXI I MIC signal input (Scrambler board)

25 OPT6 O

Scramble code output 3 (Scrambler board)

26 SB2 O Switched B output

CN19 (K2 and K3 models only)

1 LCS O LCD chip select

2 GND - GND

3D0 I/O Data bus 0

4D1 I/O Data bus 1

5D2 I/O Data bus 2

6D3 I/O Data bus 3

7D4 I/O Data bus 4

8D5 I/O Data bus 5

9D6 I/O Data bus 6

10 D7 I/O Data bus 7

11 RD - No connection

12 WR O WR bus

13 GND - GND

14 A0 O Address bus 0

CN408

1 GND - GND

2 GND - GND

3 MIC I External MIC input

4MICE - External MIC GND

5 SP+ I BTL output + for external speaker

6 PWR O Power control output

7 SP+ I BTL output + for external speaker

8 15V - 15V

9 SP- I BTL output - for external speaker

10 SB1 I Battery level input

11 SP- I BTL output - for external speaker

12 +B -

Power input after passing through the fuse

13 AF O Audio Output

14 +B -

Power input after passing through the fuse

15 VOL I Volume level input

16 +B -

Power input after passing through the fuse

17 CLK O Clock data output

18 +B -

Power input after passing through the fuse

19 GND - GND

20 LRST O LCD reset output

21 KIN I Key input

22 28M - 2.8V

23 EXAFC O External AF output

24 PSW I Power input after power switch

25 KES O Key counter clear to send

26 INAFC O Internal AF output

27 DAT O Data output

28 ECSW O Echo cancel MIC switch

29 TGL0 I Lever switch input 0

30 33M - 3.3V

31 TGL2 I Concentric switch input 2

32 33M - 3.3V

33 TGL1 I Concentric switch input 1

34 33A - 3.3V

35 CH_A I Rotary switch input 1

36 33A - 3.3V

TK-5210

TERMINAL FUNCTION

Name I/O Function

No.

Name I/O Function

No.

Control unit (X57-6820-XX B/5)

Name I/O Function

No.

35 CH_A O Rotary switch output 1

36 33A - 3.3V

37 CH_B O Rotary switch output 2

38 25D - 2.5V

39 CH_C O Rotary switch output 3

40 15D - 1.5V

41 CH_D O Rotary switch output 4

42 15D - 1.5V

43 PTT O PTT output

44 5M - 5V

45 NC - No connection

46 5M - 5V

47 oE I Shift register OE

48 LCDV - LCD contrast control voltage

49 DGND - GND

50 DGND - GND

CN603

1 INT SP- O BTL output - for internal speaker

2 INT SP- O BTL output - for internal speaker

3 INT SP+ O BTL output + for internal speaker

4 INT SP+ O BTL output + for internal speaker

5 INT MIC+ I Internal MIC input

6 INT MIC- - Internal MIC GND

CN604 (K2 and K3 models only)

1A0IAdrress bus 0

2 GND - GND

3WR IWR bus

4RD-No connection

5D7 I/O Data bus 7

6D6 I/O Data bus 6

7D5 I/O Data bus 5

8D4 I/O Data bus 4

9D3 I/O Data bus 3

10 D2 I/O Data bus 2

11 D1 I/O Data bus 1

12 D0 I/O Data bus 0

13 GND - GND

14 LCS I LCD chip select

CN751 (K2 and K3 models only)

1V4-LCD drive power supply

2V3-LCD drive power supply

3V2-LCD drive power supply

4V1-LCD drive power supply

5V0-LCD drive power supply

6VR-V0 voltage adjustment terminal

7NC-No connection

8NC-No connection

9NC-No connection

10 NC - No connection

11 NC - No connection

12 NC - No connection

13 Vout - Raising voltage output

14 VDD - 3.3V

37 CH_B I Rotary switch input 2

38 25D - 2.5V

39 CH_C I Rotary switch input 3

40 15D - 1.5V

41 CH_D I Rotary switch input 4

42 15D - 1.5V

43 PTT I PTT input

44 5M - 5V

45 NC - No connection

46 5M - 5V

47 oE O Shift register OE

48 LCDV - LCD contrast control voltage

49 DGND - GND

50 DGND - GND

CN601

1 GND - GND

2 GND - GND

3 MIC O External MIC output

4MICE - External MIC GND

5 SP+ O BTL output + for external speaker

6 PWR I Power control input

7 SP+ O BTL output + for external speaker

8 15V - 15V

9 SP- O BTL output - for external speaker

10 SB1 O Battery Level output

11 SP- O BTL output - for external speaker

12 +B -

Power input after passing through the fuse

13 AF I Audio input

14 +B -

Power input after passing through the fuse

15 VOL O Volume level output

16 +B -

Power input after passing through the fuse

17 CLK I Clock data input

18 +B -

Power input after passing through the fuse

19 GND - GND

20 LRST I LCD reset input

21 KIN O Key output

22 28M - 2.8V

23 EXAFC I External AF input

24 PSW O Power output after power switch

25 KES I Key counter clear to send

26 INAFC I Internal AF input

27 DAT I Data input

28 ECSW I Echo cancel MIC switch

29 TGL0 O Lever switch output 0

30 33M - 3.3V

31 TGL2 O Concentric switch output 2

32 33M - 3.3V

33 TGL1 O Concentric switch output 1

34 33A - 3.3V

TK-5210

TERMINAL FUNCTION

Name I/O Function

No.

Option board unit (X57-6820-XX D/5)

Name I/O Function

No.

15 NC - No connection

16 GND - GND

17 GND - GND

18 D7 I/O Data bus 7

19 D6 I/O Data bus 6

20 D5 I/O Data bus 5

21 D4 I/O Data bus 4

22 D3 I/O Data bus 3

23 D2 I/O Data bus 2

24 D1 I/O Data bus 1

25 D0 I/O Data bus 0

26 E/RD I RD bus

27 WR O WR bus

28 A0 O Adrress bus 0

29 LRST O LCD reset output

30 LCS O LCD chip select

CN752

1NC-No connection

2 L_MIC I Noise canceler MIC

3MICE - MIC GND

4 GND - GND

5 CH_A I Rotary switch input 1

6 CH_B I Rotary switch input 2

7 CH_C I Rotary switch input 3

8 CH_D I Rotary switch input 4

9 36M - 3.6V

10 S36M - 3.6V

11 33M - 3.3V

12 TGL0 I Lever switch input 0

13 TGL1 I Concentric switch input 1

14 TGL2 I Concentric switch input 2

15 BLED - Busy LED control

16 TXLED - TX LED control

17 ORG O Key scan signal output

18 VOL I Volume level input

19 L_KEY1 O Key scan signal output

20 GND - GND

CN753

1 PF2 O Key output (Side2 Key)

2 PF3 O Key output (Side3 Key)

3 L_KEY1 I Key input

4 L_PTTG I PTT GND

5 L_PTT I PTT input

6 PF1 O Key output (Side1 Key)

CN901

1 OPT1 I

Scramble code input 1 (Scrambler board)

I Channel busy (ANI board)

O Busy (VGS-1)

Top panel unit (X57-6820-XX C/5)

Name I/O Function

No.

2 OPT3 I

Scramble code input 2 (Scrambler board)

O Key (ANI board)

O Play (VGS-1)

3 RXD1 O Serial Data output(VGS-1)

4 TXD1 I PTT (Scrambler board)

I Serial Data input (VGS-1)

5NC-No connection

6 OPT4 I/O Echo PTT (Scrambler board)

I PTT (ANI board)

I Enable (VGS-1)

7NC-No connection

8 OPT5 I

Scramble code input 4 (Scrambler board)

I Emergency (ANI board)

I Reset input(VGS-1)

9 DGND - DGND

10 AGND - GND

11 NC - No connection

12 NC - No connection

13 AGND - GND

14 5A - 5V

15 STON O Side tone output(ANI board)

16 DI/ANI O Data output (ANI board)

17 TCONT O Speaker mute signal (ANI board)

18 MAN DOWN I Man-down input (ANI board)

19 INH O MIC mute signal output (ANI board)

20 OPT2 I

Scrambler control signal input (Scrambler board)

O Emergency signal output (ANI board)

21 TXO I MIC signal input (Scrambler board)

22 RXEO I Audio signal input (Scrambler board)

23 RXEI O Audio signal output (Scrambler board)

24 TXI O MIC signal output (Scrambler board)

25 C3 I

Scramble code input 3 (Scrambler board)

26 SB2 I Switched B input

CN902

1 36M - 3.6V

2 S36M - 3.6V

3 GND - GND

4 VOL I Volume level input

5 33M - 3.3V

6 CH_A I Rotary switch input 1

7 TGL2 I Concentric switch input 2

8 TGL1 I Concentric switch input 1

9C -GND

10 CH_B I Rotary switch input 2

11 CH_D I Rotary switch input 4

12 CH_C I Rotary switch input 3

CN903

1 GND - GND

2 CH_A O Rotary switch output 1

Name I/O Function

No.

TK-5210

3 CH_B O Rotary switch output 2

4 CH_C O Rotary switch output 3

5 CH_D O Rotary switch output 4

6 36M - 3.6V

7 S36M - 3.6V

8 33M - 3.3V

9 TGL0 O Lever switch output 0

10 TGL1 O Concentric switch output 1

11 TGL2 O Concentric switch output 2

12 BLED - Busy LED control

13 TXLED - TX LED control

14 ORG I Key scan signal input

15 VOL O Volume Level output

16 KIN I Key scan signal input

17 GND - GND

1 SSW I EXT/INT speaker switch input

2 SP+ O BTL output + for external speaker

3SP− O BTL output − for external speaker

4 MSW I EXT/INT MIC switch input

5 EMC I External MIC input

6ME-External MIC GND

7 PTT I External PTT input

8PFIProgrammable function key input

9 OPT - No connection

10 E - GND

11 5M - 5V

12 TXD O Serial data output

13 RXD I Serial data input

14 NC(E) - Not used (GND)

TERMINAL FUNCTION

Universal connector

Name I/O Function

No.

Name I/O Function

No.

TK-5210

SEMICONDUCTOR DATA

CPU:30625MGP193GP (TX-RX unit: IC5)

Port Name I/O Function

No.

Port Name I/O Function

No.

48 KIN I Key counter return 49 MODEL I Model detection 50 RDY I Bus control (Ready)

51 ALE - No connection 52 HOLD I Bus control (Hold) 53 HLDA - No connection

54 WN O Wide/Narrow ceramic filter switching

(L:Narrow, H:Wide)

55 VN O Wide,Narrow/APCO ceramic filter

switching (L:APCO, H:Analog)

56 EXTIM I External option control port from

universal connector

57 SCSW O When the scrambler board is installed,

the route of AF is changed. (L:Scrambler on, H:off)

58 BCLK O Bus control (Base clock output) 59 RD O Bus control (Read) 60 BHE - No connection

61 WR O Bus control (Write) 62 TGL0 I Lever switch input 0 63 TGL1 I Concentric switch input 1

64 TGL2 I Concentric switch input 2 65 CS3 O LCD CS 66 CS2 O Flash memory CS

67 CS1 O DSP CS 68 CS0 O Flash memory CS 69 A19 O Address bus 19

70 A18 O Address bus 18 71 A17 O Address bus 17 72 A16 O Address bus 16

73 A15 O Address bus 15 74 A14 O Address bus 14 75 A13 O Address bus 13

76 A12 O Address bus 12 77 A11 O Address bus 11 78 A10 O Address bus 10

79 A9 O Address bus 9 80 INAFC O Internal AF control (L:Off, H:On) 81 CH_A I Rotary switch input 1

82 CH_B I Rotary switch input 2 83 CH_C I Rotary switch input 3 84 CH_D I Rotary switch input 4

85 VCC2 - Power supply input 86 A8 O Address bus 8 87 VSS3 - Power supply input

88 A7 O Address bus 7 89 A6 O Address bus 6 90 A5 O Address bus 5

91 A4 O Address bus 4 92 A3 O Address bus 3 93 A2 O Address bus 2

94 A1 O Address bus 1 95 A0 O Address bus 0 96 EXAFC O External AF Control (L:Off, H:On)

1 VREF - A/D converter reference voltage input

terminal

2 AVCC - A/D converter power supply input

terminal 3 T/R O TX/RX switch (L:TX, H:RX) 4 BATT DET I(A/D) Battery detection terminal

5 NC(ANEX0) I NC (For expansion A/D) 6 LCDV O

(D/A)

LCD contrast adjustment 7 VOICE O

(D/A)

Voice output

8 SOE O Shift register OE 9ULIPLL unlock input

10 DAT O Common data

11 CLK O Common clock 12 SDA I/O EEPROM data 13 BYTE I Use as 8bit data bus (Vcc)

14 CNVSS I Use as memory expansion mode (Vss) 15 PCS O Potentiometer CS 16 NC - No connection

17 RESET I Reset input 18 XOUT - No connection 19 VSS1 - Power supply input

20 XIN - Clock input, 9.216MHz(18.432MHz/2) 21 VCC1 - Power supply input 22 NMI I NC 23 RTCDT I/O RTC data I/O

24 PSW I

(INT1)

Power switch detection

(L:Power on, H:Power off)

25 INTRA I

(INT0)

RTC interrupt input

26 LD O DAC LD 27 BEEP

(PWM)

Beep output

28 LE O PLL CS

29 BSFT O Beat shift output

(L:Shift, H:Not shift)

30 KEY/PLAY I TX key input (for ANI board),

Play Input (for VGS)

31 STRB O Shift register CS 32 INH I Audio inhibit input (for ANI board),

33 AUXI I AUX input (for ANI board), 34 TCNT I Tone control input (for ANI board), 35 BEEPS O Beep switch(L:Unmute, H:Mute)

36 TXD1

(UART)

UART(for VGS)

37 VCC1 - Power supply input 38 RXD1 I

(UART)

UART(for VGS)

39 VSS2 - Power supply input 40 BUSY I BUSY input(for VGS) 41 RTSM/EXTO O UART(3.3V➔5V)/External option

output port to universal connector

42 TXDM

(UART)

UART(3.3V➔5V)

43 RXDM I

(UART)

UART(5V➔3.3V)

44 DSRM I UART(5V➔3.3V) 45 CTSM I UART(5V➔3.3V) 46 A20 O Flash memory A19

47 KES O Key counter CS

TK-5210

1 STRB I Latch clock input 2 DATA I Serial data input 3 CLK I Serial clock input

4-7 Q1-Q4 O Key counter

8 VSS - GND 9QSOSerial data output

10 Q’S O NC

11-14 Q8-Q5 O Key counter

15 OE I Output enable control input

16 VDD - Power supply input

1 STRB I Latch clock input

2 DATA I Serial data input 3 CLK I Serial clock input

4-7 Q1-Q4 O Key counter

8 VSS - GND 9QSOSerial data output

10 Q’4 O NC

11-14 Q8-Q5 O Key counter

15 OE I Output enable control input 16 VDD - Power supply input

1 STRB I Latch clock input 2 DATA I Serial data input 3 CLK I Serial clock input

4-7 Q1-Q4 O Key counter

8 VSS - GND 9OS ONC

10 NC O NC 11 Q8 O Audio amplifier switch 12 Q7 O Backlighit switch

13 Q6 O TX LED switch 14 Q5 O Busy LED switch 15 OE I Output enable control input

16 VDD - Power supply input

97 HINT I(INT4) DSP HINT interrupt 98 CAE3 I Man-down switch input 99 PTT I PTT input

100 EXSP I External speaker install check 101 DRST O DSP reset output 102 FRST O Flash memory reset output

103 DSPINT O DSP interrupt output 104 D7 I/O Data bus 7 105 D6 I/O Data bus 6

106 D5 I/O Data bus 5 107 D4 I/O Data bus 4 108 D3 I/O Data bus 3

109 D2 I/O Data bus 2 110 D1 I/O Data bus 1 111 D0 I/O Data bus 0

112 5TC O 5T control (L:Off, H:On) 113 5RC O 5R control (L:Off, H:On) 114 5CC O 5C control (L:Off, H:On)

115 APCSW O APC switch output (L:Off, H:On) 116 ANTSW - No connection 117 SELF I 3.3V

118 MM O MIC mute output (L:Unmute, H:Mute) 119 PWR O Power control output

(L:Power off, H:Normal)

120 WPA I(A/D) PA temperature compensation 121 SQ I(A/D) Analog SQ input 122 CV I(A/D) VCO CV input

123 RSSI I(A/D) RSSI input 124 TEMP I(A/D) Temperature input 125 BATT I(A/D) Battery level input

126 REM I(A/D) KMC-25 PF1/PF2 key, KVL3000 input 127 AVSS -

A/D converter power supply input terminal

128 VOL I(A/D) Volume level input

1 STRB I Latch clock input 2 DATA I Serial data input

3 CLK I Serial clock input 4Q1OOPT5 5Q2OOPT4

6Q3OOPT1 7Q4 OOP_MAN 8 VSS - GND

9QSOSerial data output 10 Q'S O NC 11 Q8 O OPT6

12 Q7 O OPT2 13 Q6 O CHGIO:UNIV 9p I/O Switching 14 Q5 O OPT3

15 OE I Output enable control input 16 VDD - Power supply input

SEMICONDUCTOR DATA

Port Name I/O Function

No.

Port Name I/O Function

No.

Shift Register:BU4094BCFV (TX-RX unit: IC 11)

Shift Register: BU4094BCF (Control unit IC701)

Port Name I/O Function

No.

Shift Register: BU4094BCF (Control unit IC702)

Port Name I/O Function

No.

Shift Register: BU4094BCF (Control unit IC703)

Port Name I/O Function

No.

TK-5210

IC1 IC RTC IC

IC2 IC EEPROM

IC3 IC Voltage DET

IC4 IC Temperature DET

IC5 IC CPU

IC6 IC Flash ROM

IC7 IC 3.3V➝5V Buffer

IC8 IC DSP

IC9 IC Buffer

IC10 IC Multiplexer

IC11 IC Shift register

IC12 IC D-type flip flop

IC13 IC FPGA

IC14 IC Buffer

IC101 IC Auto power control

IC102,103 IC SPDT

IC104 IC DC AMP for APC

IC201 IC DC AMP for BPF

IC202 IC DBM

IC203 IC Multiplexer

IC204 IC FM IC

IC205~207 IC Multiplexer

IC208 IC Buffer

IC301 IC DC AMP for VCO tune

IC303 IC PLL IC

IC304 IC 1/2 Divider

IC401 IC Voltage regulator (5T/5R)

IC402 IC Voltage regulator (5C)

IC403 IC OP AMP (5V reference/SQL AMP)

IC404 IC Switch (VGS TX I/O)

IC405 IC OP AMP (TX AGC AMP/Buffer AMP)

IC406 IC CODEC

IC407 IC OP AMP (TX LPF/ RX LPF)

IC408 IC Switch (RX scrambler SW/BEEP SW)

IC409 IC

OP AMP (TX buffer AMP/RX buffer AMP)

IC411 IC D/A converter

IC412 IC

OP AMP (TX MOD AMP/3.3V reference)

IC413 IC Multiplexer

IC414 IC Rheostat

IC415 IC Bus switch (8ch)

IC416,417 IC Bus switch (2ch)

IC501,502 IC UART switch

Q1 FET 5V➝3.3V level converter

Q101 Transistor RF AMP

Q102 Transistor RF AMP

Q103 FET RF driver AMP

Q104 FET APC switch

Q105 FET RF final AMP

Q106 Transistor APC switch

Q107 FET APC switch

Q110 FET SPDT EXT/INT switch

Q111 Transistor 3.3V➝5V level converter

COMPONENTS DESCRIPTION

Ref. No. Part name Description

TX-RX unit (X57-6820-XX A/5)

Q201 Transistor Ripple filter

Q202 FET RF AMP

Q204 FET IF AMP

Q205 Transistor 2nd local buffer AMP

Q209 Transistor W/N switch

Q306 FET Buffer for CV

Q307 Transistor Ripple filter

Q308 FET T/R switch

Q309 FET T/R switch

Q310,311 Transistor VCO oscillation

Q312~314 Transistor Buffer AMP

Q315 Transistor Ripple filter

Q316 FET Switch

Q401 FET 5T switch

Q402 FET 5R switch

Q403 FET 5M switch

Q404 Transistor Auto gain control

Q405 Transistor Auto gain control

Q406 FET MIC mute

Q407,408 FET TX scrambler switch

Q409,410 FET EXT MIC switch

Q411 FET VGS I/O switch

Q412 Transistor Noise AMP

Q415,416 FET SB switch

Q417 FET APC switch

Q418 FET Beat shift switch

Q420 FET S33A switch

D1 Diode Reverse current prevention

D2,D3 Diode Surge absorption

D4~6 Varistor Surge absorption

D13,14 Diode Reverse current prevention

D101 Diode Local switch

D105 Zener diode Voltage protection

D106~109 Diode Antenna switch

D110,111 Varistor Surge absorption

D202~209

Variable

Vari-cap tune

capacitance diode

D210 Diode Local switch

D303,304

Variable

Frequency control

capacitance diode

D306~312

Variable

Frequency control

capacitance diode

D313 Diode Ripple filter

D314 Diode Bypass diode

D401 Diode Reverse protection

D402~404 Diode Detection

D405 Diode Reverse current prevention

Ref. No. Part name Description

TK-5210

COMPONENTS DESCRIPTION

Ref. No. Part name Description

Top Panel unit (X57-6820-XX C/5)

IC601,602 IC Audio AMP

IC603 IC OP AMP (AF Pre-AMP/TX AF AMP)

IC604 IC AF mute switch

IC606 IC Voltage regulator (28M)

IC701~703 IC Shift register

IC704 IC DC AMP for LCD voltage

IC801 IC Voltage regulator (33M)

IC802 IC Voltage regulator (33A)

IC803 IC Voltage regulator (15D)

IC804 IC Voltage detector (5.6V)

IC805 IC DC/DC converter (3.6V)

IC806 IC Voltage regulator (25D)

IC807 IC Voltage regulator (5M)

IC808 IC DC/DC converter (15V)

Q601 FET EXT/INT gain convert switch

Q605 Transistor 5A AVR switch

Q606 FET 5A AVR switch

Q607 Transistor Noise canceler switch

Q608 Transistor 5A AVR

Q609 FET External audio mute switch

Q610 FET External audio mute switch

Q611 FET Internal audio mute switch

Q612 FET Internal audio mute switch

Q702 FET PSW switch

Q703 FET Busy LED switch

Q704 FET TX LED switch

Q705,706 Transistor Power supply control switch

Q801 FET Switch (3.6V DC/DC)

Q802 FET Switch (15V DC/DC)

D604 Diode Surge absorption

D608,609 Diode Reverse current prevention

D701~704 Diode Reverse current prevention

D705~708 LED Key backlight

D709 LED LCD backlight

D711,712 LED Key backlight

D713 LED LCD backlight

D715,716 LED Key backlight

D717~719 Diode Reverse current prevention

D720 Zener diode AVR for backlight LED

D723 LED LCD backlight

D801 Diode Reverse current prevention

D802 Diode Reverse protection

D803,804 Diode Reverse protection

D805 Diode Reverse protection

Ref. No. Part name Description

Control unit (X57-6820-XX B/5)

D901 LED TX/RX LED

+ 59 hidden pages

Kenwood TK-5210 K, TK-5210 K2, TK-5210 K3 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual