Kenwood TK-5210 Service manual

VHF APCO P25 TRANSCEIVER

TK-5210

SERVICE MANUAL

© 2004-11 PRINTED IN JAPAN

B51-8703-00 (S) 658

Helical Antenna
(KRA-22: Option)

Knob (Volume)
(K29-9322-03)

Knob (PTT)
(K29-9328-02)

Main cabinet
(A02-3875-01)

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

Helical Antenna
(KRA-22: Option)

Knob (Volume)
(K29-9322-03)

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

Knob (PTT)
(K29-9328-02)

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

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

Knob (Volume)
(K29-9322-03)

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

Knob (PTT)
(K29-9328-02)

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

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

Helical Antenna
(KRA-22: Option)

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

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

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

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

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

CONTENTS

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

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

TK-5210

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.

Model &
Destination (Market code)

TK-5210 K2 ✓ 136~174 MHz

Unit X57-682X-XX

0-10 0-11 0-12

K ✓

K3 ✓✓✓✓

Frequency range Remarks LCD 4-key

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.

DTMF

keypad

1st IF:49.95MHz

LOC:50.4MHz

---

✓✓

-

SYSTEM SET-UP

Merchandise received

License and frequency allocated by FCC

Choose the type of transceiver

Transceiver programming

Are you using the optional antenna?

NO

Are you using the speaker microphone?

NO

Delivery

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

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

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.)

YES

KRA-22 or KRA-26

Helical antenna

(Option)

YES

KMC-25

(Option)

DTMF keypad

No

2

TK-5210

REALIGNMENT

1. Modes 2. How to Enter Each Mode

User mode

Panel test mode

PC mode

Firmware
programming mode

Clone mode ∗1

Self programming mode ∗1

Firmware version information

Clock adjustment mode ∗1

Mode Function

User mode For normal use.

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

Panel tuning mode ∗1

PC mode Used for communication between the

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.

Firmware Used when changing the main program of

programming mode the flash memory.

Clone mode ∗1 Used to transfer programming data from

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

∗

1

tal characteristics.

Used by the dealer to tune the transceiver.

transceiver and PC (IBM compatible).

This feature is included in the FPU.

See panel tuning.

one transceiver to another.

Panel tuning mode ∗1

Data programming mode

PC test mode

∗

1

PC tuning 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

programming mode

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

Self

programming

mode ∗2 while turning the transceiver power on and

Firmware version

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

∗

2 : K2 and K3 models only

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

while turning the transceiver power on and

then release the [Side3] key first.

while turning the transceiver power on and

then release the [Side2] key first.

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

then release the [PTT] key first.

Press and hold the [Side3] key

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.

3

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.

IBM-PC

KPG-36

KPG-95D

Fig. 1

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.

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:

• 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 trans-

ceiver to the computers RS-232C serial port.

5-4. Programming software KPG-95D description

The KPG-95D is the programming software for the trans-

ceiver 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.

4

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.

REALIGNMENT

TK-5210

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.

3.

• 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.)

Cloning cable
(E30-3325-05)

Fig. 2

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

5

TK-5210

REALIGNMENT

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

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”

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.

step 3 described on page 5.

Note :

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

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

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.

The setup items for self programming mode are as follows.

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

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

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

Key operation

Item

Key

[Side3]

Item

Key

[Side2] Increment a number in the specified digit Unused

[Side3] Decrement a number in the specified digit Unused

Keypad Add a digit to the

(K3 model only)

6

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

[A] Go to the next item

Zone/ Channel

[B]

[C]

[D]

[A] Go to the next item

[B]

[C] Unused

[D] Determine the least digit

switching

Zone/ Channel

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

Zone/ Channel

up

Data

writing switching switching

RX NAC TX NAC TG List No.

Delete the least digit from the current number

2.5kHz/5kHz/6.25kHz/

7.5kHz/1MHz Unused

step switching

1 step down

1 step up

Unused

(Press and hold to delete all numbers.)

current number

ON/OFF

ANALOG/APCO/MIXED

ANALOG/APCO/MIXED

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

ANALOG/APCO Channel spacing

ANALOG/APCO Channel spacing

Unused

number down

QT/DQT(N)/DQT(I)/OFF

switching

Signaling down

Signaling up

1 step/Standard

Unused

TG List

TG List

number up

Unused

●

Self programming mode flow chart

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

[A] [A]
[TX frequency] : "OFF"

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

[A]
[Channel type] : "APCO"

REALIGNMENT

Input Password

Read authorization password entry (6 digits)
[A]

Self programming mode

[A]

Zone/Channel

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

RX frequency

[A]

TX frequency

[A]

Channel type

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

TX mode

[A]

Channel spacing

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

[Side 3]

Zone selection

OFF

ANALOG

[B]

Channel selection

[C]/[D]

[C]/[D]

[C]/[D]

*1

*2

APCO

APCOANALOG

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

APCO 12.5kHz

*2 [Channel type] : "APCO"

[B]

[C]/[D]

[C]/[D]

[C]/[D]

TK-5210

MIXED

12.5kHz25.0kHz

12.5kHz

[A]
[TX frequency] : "OFF"

[Channel type] : "ANALOG"

[A]
[Channel type] : "ANALOG"

[A]
Talkgroup ID List Amount : 0

[A]
[TX frequency] : "OFF"

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

[A]
[TX frequency] : "OFF"

RX signaling

[A]
[TX frequency] : Other than "OFF"

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

TX signaling

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

RX NAC

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

TX NAC

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

Talkgroup list number

[A]

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

OFF QT

[B] [B] [B]

OFF QT DQT N

[B]

DQT N

[B]

[B]

DQT I

DQT I

[B]

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

YEAR

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

[A]

MONTH

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

[A]

DAY

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

[A]

HOUR

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

[A]

MINUTE

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

[A]

Completion

7

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

""" mark

2

Rear panel

1

2. Remove the four screws 3 and universal connector cap

4.

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

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).

Battery pack
release latch

5 and remove the chassis from the front case.

6

3

Chassis

3

4

5

CN603

SP/MIC FPC

1, and

""" mark

6

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

1. Remove the six screws 7.

CONTROL PCB

7

2. On the reverse side of the CONTROL PCB

7

7

Chassis

8, remove the

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

CN752

CN601

CN604

8

CN753

Cord ASSY

■ 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 @.

TX-RX PCB

9

9

9

9

!.

UNIV
(CN102)

9

9

9

12

12

MAIN
(CN101)

10

CN7

11

Front case

Chassis

Universal
connector FPC

8

DISASSEMBLY FOR REPAIR

TK-5210

■ 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
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.

18

%.

^ using a pair of

*.

13

16

15

17

O-ring

14

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.

The projection
of the volume

1

CONTROL-TOP

FPC

3. Pass the coaxial cable

2

VOL/CH FPC

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

3 of the antenna receptacle

through the round hole of the hardware fixture
insert it into the coaxial connector (MAIN (CN101)) of the
TX-RX PCB.

pedestal

The projection of
the channel
switch pedestal

4, then

■ 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
CONTROL-TOP FPC

⁄ from the two connectors (CN902,

CN903) of the TOP PCB.

TOP PCB

CN902

20

19

19

21

CN903

) and

4

MAIN
(CN101)

3

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

5.

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

7.

5

7

6

9

TK-5210

3

3

tab

CONTROL PCB

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

CN902

8

0.
!.

10

11

9

CN903

■ 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.

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.

3

6

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

CN102

5

4

2

1

CN101

■ 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.

Adhesive sheet

(J99-0393-04)

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

4

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

5.

CN751

5

■

Main Packing (G53-1637-04) Installation Procedure

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

Main packing

1, then fit the packing into the

2.

1

Adhesive sheet

(J99-0394-04)

CONTROL PCB

2. Fold the LCD ASSY FPC to the back of the holder
that the FPC is between the two tabs on the right side of

2.

tab

2

1

LCD ASSY FPC

10

the holder

tab

3

3

2

1 so

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.

DISASSEMBLY FOR REPAIR

TK-5210

■ 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
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.

1, then fit the packing into the right

2

Hardware fixture

1

2

Top packing

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

Two s crews

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

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

speaker.

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

2.
3 (J99-

■ 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

Volume torque-up packing

1

1.

■ 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).

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

7

2

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

7.

6

3

4 5

1

GND terminal

11

TK-5210

DISASSEMBLY FOR REPAIR

■ 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

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

step 1

4. Attach two pieces of double-sided adhesive tape

back of the holder and remove the separation paper.

5. Remove the protection sheet (transparent) attached to

one side of the new filter
sheet (yellow) from the other side

7 8 and remove the protection

9.

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.

10

1

2

5

3

1

10

3

6

7

6

6 to the

5

4

■ 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

4.

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

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

4

7

5

6

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

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

3.

4.

6.

7.

3

2

1

Top panel

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

6

6

8

9

■ 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.

Cord Assy(X42-3270-10)

TX-RX

CUT

12

CONT

■ Volume Knob and Channel Knob Parts Replace­ment

Since the volume knob consists of two components, a

1 and a spacer 2, replace and reinstall these two

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

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

knob
and reinstall these three parts at the same time.

Volume Knob Channel Knob

5

1

2

3

4

CIRCUIT DESCRIPTION

TK-5210

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.

ANT

TX/RX : 136~174MHz

PA

RF

AMP

TX

AMP

ANT

SW

AMP

1st MIX

49.95MHz

16.8MHz

VCXO

185.95~

223.95MHz

136~174MHz

MCF

450kHz

IF AMP

x3

50.4MHz

CF

MIX

PLL

VCO

FPGA

A/D
D/A

DSP

AF

AMP

MIC

AMP

SP

MIC

Fig. 1 Frequency configuration

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.

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

L202

TUNE

Q202L201

BPF BPF BPF

LNA MIXER

XF201

MCF

49.95MHz

L204 L205 IC202

BPF

Q204

IF AMP

CF201

IC204

FM IC

1st

Tripler

VCXO

2nd Local OSC

Q205

X3

X201

16.8MHz

1st Local OSC

Fig. 2 Receiver section

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).

VN WN

HH

L

L

49.95MHz

Filter

APCO

HLWide

Narrow

450kHz

IC203

CF201

CF202

APCO

CF204

IC204

FM IC

Narrow

CF203

Wide

IC206

WN WN

IC207

IC205

VNVN

CD201

AF

APCO

CD

DET

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

50.4MHz

Q205

x3

X201

VCXO

16.8MHz

Fig. 3 Wide/Narrow/APCO switching circuit

13

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).

IC403

LPF AMP

Q412

Noise AMP

D404

DET

IC5

CPU

Fig. 5 Squelch circuit

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

14

IC8
DSP

IC406
CODEC

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

IC407
LPF

Scrambler board

IC408
SW

BEEPS/
SCSW

BEEP/
voice announce

IC411
DAC

EXT AFC EXT AFC

IC603
AMP

IC604
SW

INT AFC

IC601
AMP

Fig. 4 Audio circuit diagram

IC602
AMP

INT SP

universal connector
EXT SP

CIRCUIT DESCRIPTION

TK-5210

(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.

EXT.MIC

MIC(MAIN)

MIC(SUB)

MSW/CTS
MM

IC603

N/C
AMP

MIC

Q410
SW

Q406
SW

D402,D403
DET

AGC-AMP
IC405
LPF

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.

Scrambler board

IC412
AMP

Q311
VCO

X301
VCXO

Q407SWIC8

SCSW

DSP

IC406
CODEC

IC407
LPF

IC409
BUFF

IC411
DAC

Fig. 6 Audio band and Base band circuit

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

D101
T/R SW

Q101
Pre Pre
Drive Amp

Q102
Pre
Drive Amp

3dB

Attenuator

Q103

Drive Amp

Fig. 7 Transmitter circuit

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

LPF

IC102,IC103

SPDT

APC SW

CN101

CN102

Q105

Final Amp

D106,D107

R119+BR120

ANT SW

IC101
APC

15

TK-5210

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

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.

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).

Fig. 8 PLL block diagram

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

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.

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

16

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

CIRCUIT DESCRIPTION

TK-5210

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

IC5

CPU

FLASH

IC6

IC2

EEPROM

Fig. 9 Memory circuit

IC5

CPU

IC8

DSP

IC13

FPGA

IC406

CODEC

9.216MHz

9.216MHz

IC14

(2/3,3/3)

18.432MHz

18.432MHz

IC12

IC14
(1/3)

X2

VCXO

18.432MHz

Fig. 10 Clock diagram

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

17

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.

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.

18

3A Fuse

Batt

Drive, Final AMP

+B

+B

IC804

Detect

Q415

Power

SW

IC5

CPU

IC805

DC/DC

CE

S36M

PWR

PWR

PWR

3.6V

VOL

SW

SB

5CC

+B

IC801

AVR IC

CE

IC802

AVR IC

CE

IC803

AVR IC

CE

IC806

AVR IC

CE

IC606

AVR IC

IC808

DC/DC

CE

IC807

AVR IC

CE

IC402

AVR IC

CE

IC401

AVR IC

CE

CPU, FlashROM,

33M

EEPROM, VCXO,

33A

15D

2.5D

28M

15V

Q402
5R SW

CE

5MC

5C

Q402
5R SW

CE

5RC

Q401
5T SW

CE

5TC

DC/DC, AVR

FPGA (I/O)

DSP (I/O)

DSP Core

FPGA Core

RTC

LCD
VCO

5M

5MCS

5R

5T

Fig. 11

TERMINAL FUNCTION

TK-5210

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

Pin
No.

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

1 OPT1 O

2 OPT3 O

3 RXD1 I Serial data intput(VGS-1)

4 TXD1 O PTT (Scrambler board)

5NC-No connection

6 OPT4 I/O Echo PTT (Scrambler board)

7 USEL - GND

8 OPT5 O

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

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

Name I/O Function

CN7

CN14

Scramble code output 1 (Scrambler board)

O Channel busy (ANI board)

I Busy (VGS-1)

Scramble code output 2 (Scrambler board)

I Key (ANI board)

I Play (VGS-1)

O Serial data output (VGS-1)

O PTT (ANI board)

O Enable (VGS-1)

Scramble code output 4 (Scrambler board)

O Emergency (ANI board)

O Reset output(VGS-1)

(Scrambler board)

I Emergency signal input (ANI board)

Scramble code output 3 (Scrambler board)

Pin
No.

26 SB2 O Switched B output

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

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 -

13 AF O Audio Output

14 +B -

15 VOL I Volume level input

16 +B -

17 CLK O Clock data output

18 +B -

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

Name I/O Function

CN19 (K2 and K3 models only)

CN408

Power input after passing through the fuse

Power input after passing through the fuse

Power input after passing through the fuse

Power input after passing through the fuse

19

TK-5210

TERMINAL FUNCTION

Pin
No.

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

Name I/O Function

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

Pin
No.

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 -

13 AF I Audio input

14 +B -

15 VOL O Volume level output

16 +B -

17 CLK I Clock data input

18 +B -

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

Name I/O Function

CN601

Power input after passing through the fuse

Power input after passing through the fuse

Power input after passing through the fuse

Power input after passing through the fuse

Pin

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

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

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

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

Name I/O Function

CN603

CN604 (K2 and K3 models only)

CN751 (K2 and K3 models only)

20

TERMINAL FUNCTION

TK-5210

Pin
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

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

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)

Name I/O Function

CN752

CN753

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

Pin
No.

1 OPT1 I

Name I/O Function

CN901

Scramble code input 1 (Scrambler board)

I Channel busy (ANI board)

O Busy (VGS-1)

Pin
No.

2 OPT3 I

3 RXD1 O Serial Data output(VGS-1)

4 TXD1 I PTT (Scrambler board)

5NC-No connection

6 OPT4 I/O Echo PTT (Scrambler board)

7NC-No connection

8 OPT5 I

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

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

26 SB2 I Switched B input

Name I/O Function

Scramble code input 2 (Scrambler board)

O Key (ANI board)

O Play (VGS-1)

I Serial Data input (VGS-1)

I PTT (ANI board)

I Enable (VGS-1)

Scramble code input 4 (Scrambler board)

I Emergency (ANI board)

I Reset input(VGS-1)

Scrambler control signal input (Scrambler board)

O Emergency signal output (ANI board)

Scramble code input 3 (Scrambler board)

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

Pin
No.

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

1 GND - GND

2 CH_A O Rotary switch output 1

Name I/O Function

CN902

CN903

21

TK-5210

TERMINAL FUNCTION

Pin
No.

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

Name I/O Function

Universal connector

Pin
No.

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)

Name I/O Function

22

SEMICONDUCTOR DATA

TK-5210

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

Pin

Port Name I/O Function

No.

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
7 VOICE O

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

25 INTRA I

26 LD O DAC LD
27 BEEP
28 LE O PLL CS

29 BSFT O Beat shift output

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

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
37 VCC1 - Power supply input
38 RXD1 I

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

42 TXDM
43 RXDM I

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

(D/A)

LCD contrast adjustment

(D/A)

Voice output

(INT1)

Power switch detection

(L:Power on, H:Power off)

(INT0)

RTC interrupt input

O

(PWM)

Beep output

(L:Shift, H:Not shift)

Play Input (for VGS)

O

(UART)

UART(for VGS)

(UART)

UART(for VGS)

output port to universal connector

O

(UART)

UART(3.3V➔5V)

(UART)

UART(5V➔3.3V)

Pin

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)

23

TK-5210

SEMICONDUCTOR DATA

Pin

Port Name I/O Function

No.

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 ­128 VOL I(A/D) Volume level input

A/D converter power supply input terminal

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

Pin

Port Name I/O Function

No.

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

Shift Register: BU4094BCF (Control unit IC701)

Pin

Port Name I/O Function

No.

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

Shift Register: BU4094BCF (Control unit IC702)

Pin

Port Name I/O Function

No.

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

Shift Register: BU4094BCF (Control unit IC703)

Pin

Port Name I/O Function

No.

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

24

COMPONENTS DESCRIPTION

TK-5210

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

Ref. No. Part name Description

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

IC411 IC D/A converter

IC412 IC

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

OP AMP (TX buffer AMP/RX buffer AMP)

OP AMP (TX MOD AMP/3.3V reference)

Ref. No. Part name Description

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

D210 Diode Local switch

D303,304

D306~312

D313 Diode Ripple filter

D314 Diode Bypass diode

D401 Diode Reverse protection

D402~404 Diode Detection

D405 Diode Reverse current prevention

Variable

capacitance diode

Variable

capacitance diode

Variable

capacitance diode

Vari-cap tune

Frequency control

Frequency control

25

TK-5210

COMPONENTS DESCRIPTION

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

Ref. No. Part name Description

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

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

Ref. No. Part name Description

D901 LED TX/RX LED

26