Kenwood TK-3217, TK-3212 Service Manual

UHF FM TRANSCEIVER

TK-3212/3217

SERVICE MANUAL

Antenna
(T90-1039-15): TK-3212(K,M)
(T90-1040-15): TK-3212(K2,M2)
(T90-0798-25): TK-3217(M)

Knob (CH selector)
(K29-9345-04)

Knob (Volume)
(K29-9309-03)

Cabinet assy
(A02-3894-13)

Key top

Knob (PTT)
(K29-9308-13)

(K29-9346-02)

© 2005-1 PRINTED IN JAPAN

B51-8716-00 (S) 971

CONTENTS

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

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

OPERATING FEATURES ..................................... 3

REALIGNMENT .................................................... 4

DISASSEMBLY FOR REPAIR .............................. 9

CIRCUIT DESCRIPTION ..................................... 12

SEMICONDUCTOR DATA ................................. 16

COMPONENTS DESCRIPTION ......................... 17

TERMINAL FUNCTION ...................................... 17

PARTS LIST ........................................................ 18

EXPLODED VIEW ............................................... 24

PACKING ............................................................ 25

ADJUSTMENT ................................................... 26

PC BOARD

TX-RX UNIT (X57-7130-XX) ......................... 32

SCHEMATIC DIAGRAM ..................................... 36

BLOCK DIAGRAM .............................................. 40

LEVEL DIAGRAM ............................................... 42

KSC-31 / KNB-29N / KBH-10 ............................ 43

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

Button Knob
(Side1/Side2)
(K29-9307-13)

Photo is TK-3212.

This product uses Lead Free solder

TK-3212/3217

GENERAL / SYSTEM SET-UP

INTRODUCTION

SCOPE OF THIS MANUAL

This manual is intended for use by experienced technicians
familiar with similar types of commercial grade
communications equipment. It contains all required service
information for the equipment and is current as of the
publication date. Changes which may occur after publication
are covered by either Service Bulletins or Manual Revisions.
These are issued as required.

ORDERING REPLACEMENT PARTS

When ordering replacement parts or equipment information,
the full part identification number should be included. This
applies to all parts, components, kits, or chassis. If the part
number is not known, include the chassis or kit number of
which it is a part, and a sufficient description of the required
component for proper identification.

Unit

Model

& destination

TK-3212

TX-RX Unit Frequency range Remarks

K,M X57-7130-10 450~490MHz

PERSONAL SAFETY

The following precautions are recommended for personal

safety:

●

DO NOT transmit until all RF connectors are verified secure
and any open connectors are properly terminated.

●

SHUT OFF and DO NOT operate this equipment near
electrical blasting caps or in an explosive atmosphere.

●

This equipment should be serviced by a qualified technician only.

SERVICE

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

TK-3212

TK-3217

K2,

X57-7130-11 470~512MHz

M2

M X57-7130-21 440~480MHz

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

IF1 : 38.85MHz

LOC : 38.4MHz

Frequency range (MHz) RF power Type

TX/RX 450~490

TX/RX 470~512

TX/RX 440~480

A personal computer (IBM PC or compatible), programming
interface (KPG-22), and programming software (KPG-100D)
are required for programming.
(The frequency, TX power HI/LOW, and signaling data are programmed
for the transceiver.)

YES

KRA-23 or KRA-27

Optional antenna

4.0W

4.0W

4.0W

TK-3212 (K,M)

TK-3212 (K2,M2)

TK-3217 (M)

Are you using the speaker microphone?

NO

Delivery

YES

KMC-17 or KMC-21

Speaker microphone

(Option)

2

TK-3212/3217

OPERATING FEATURES

1. Controls and Functions

123 5

1

4

Microphone

10

7

8

9

Speaker

1 Antenna connector

Connect an antenna here.

2 Selector

Your dealer can program the selector as either Zone Up/
Down (default setting) or Channel Up/Down. Rotate the
selector to select a zone or channel.

3 Power switch/ Volume control

Turn clockwise to switch ON the transceiver. Rotate to
adjust the volume. Turn counterclockwise fully to switch
OFF the transceiver.

4 Transmit/ Busy/ Call indicator

This LED lights red while transmitting and green while re­ceiving a call. The LED flashes orange while receiving an
encoded call (i.e. Code Squelch, etc.) and red when the
battery power is low while transmitting.

5 Release Latch

Press the release latch to unlock and remove the battery
pack.

6 Safety Catch

Lock this catch to avoid accidentally pressing the release
latch and removing the battery pack.

7 PTT (Push-to-Talk) switch

Press this switch, then speak into the microphone to call a
station.

8 Side 1 key

Press to activate its programmable function. The default
setting is Squelch Off Momentary.

9 Side 2 key

Press to activate its programmable function. The default
setting is Lamp.

0 Display

Refer to the display.

! S key

Press to activate its programmable function. The default
setting is None (no function).

6

11

12

13

15

14

@ A key

Press to activate its programmable function. The default
setting is None (no function).

# <B key

Press to activate its programmable function. The default
setting is Channel Down.

$ C> key

Press to activate its programmable function. The default
setting is Channel Up.

% Speaker/ Microphone jacks

Connect an optional speaker/ microphone or headset here.
Otherwise, keep the supplied cap in place.

2. Display

Indicator Description

Appears when the key programmed as
Monitor or Squelch Off is pressed.
Appears when you receive a Code Squelch
call or transmit using Code Squelch.
Appears while using the Talk Around
function.
The selected zone is added to the
scanning sequence.
Appears while scanning.

Appears while using the VOX function

Appears when a message is stored in the
transceiver stack memory. Appears and
blinks when a new message has arrived.
The selected channel is set as a Priority
channel.
Appears while using low transmit power
on the selected channel.
The selected channel is added to the
scanning sequence.
Appears when the Scrambler function has
been activated.
Displays the current battery status (full/
sufficent/ low/ requires charging).
Displays the currently selected zone and
channel number or the channel name. Also
displays FleetSync messages.

3

TK-3212/3217

REALIGNMENT

REALIGNMENT

1. Modes

User mode

PC mode

Clone mode

Self programming mode

Firmware version information

Mode Function

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

Data programming Used to read and write frequency data
mode

PC test mode Used to check the transceiver using

Clone mode Used to transfer programming data

Self programming You can program the frequency,
mode signaling and other functions using

Firmware version Used to confirm the internal firmware
information version.

Data programming
mode

PC test mode

transceiver and PC (IBM compatible).

and other features to and from the
transceiver.

the PC.
This feature is included in the FPU.

from one transceiver to another.

only the transceiver.

PC tuning mode

2. How to Enter Each Mode

Mode Operation

User mode Power ON
PC mode Received commands from PC
Clone mode [<B]+Power ON (Two seconds)
Self programming mode
Firmware version [Side1]+[Side2]+Power ON
information (Two seconds)

[S]+Power ON (Two seconds)

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

Notes:

• The data stored in the personal computer must match the

model type when it is written into the EEPROM.

• Change the TK-3212/3217 to PC mode, then attach the

interface cable.

3-3. KPG-22 description

(PC programming interface cable: Option)

The KPG-22 is required to interface the TK-3212/3217 with
the computer. It has a circuit in its D-subconnector (25-pin)
case that converts the RS-232C logic level to the TTL level.

The KPG-22 connects the SP/MIC connector of the TK-3212/
3217 to the computer’s RS-232C serial port.

3-4. Programming software description

KPG-100D is the programming software for TK-3212/3217
supplied on a CD-ROM. This software runs under Windows
98, ME, Windows 2000 or XP on an IBM-PC or compatible
machine.

The data can be input to or read from TK-3212/3217 and
edited on the screen. The programmed or edited data can be
printed out. It is also possible to tune the transceiver.

IBM-PC

KPG-22

RF Power meter

or SSG

KPG-100D

Tuning cable
(E30-3216-05)

Gray +
Gray/Black –

1.5D-XV Lead wire +

1.5D-XV Shield wire –

SP

}

MIC

}

3. PC Mode

3-1. Preface

The TK-3212/3217 transceivers are programmed using a
personal computer, a programming interface (KPG-22) and
programming software (KPG-100D).

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

3-2. Connection procedure

1. Connect the TK-3212/3217 to the personal computer with

the interface cable.

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

entered immediately. When the PC sends a command,
the transceiver enters PC mode. In the PC mode,
"PROGRAM" is displayed on the LCD.

4

Fig. 1

4. Clone Mode

4-1. Outline

"Clone Mode" copies the transceiver data to another

transceiver.

The dealer can copy the transceiver data to another

transceiver even without the use of a personal computer.

4-2. Example

The transceiver can copy the programming data to one or

more transceivers via RF communication.

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

REALIGNMENT

TK-3212/3217

4-3. Operation

1. To switch the clone slave/s to Clone mode, press and hold
the [<B] key while turning the transceiver power ON.

2. Wait for 2 seconds. “CLONE” appears on the LCD, followed
by “FRQTBL 1”.

3. Select a channel table number using the [Selector] knob.

4. To switch the clone master to Clone mode, press and hold
the [<B] key while turning the transceiver power ON.

5. Wait for 2 seconds. “CLONE” appears on the LCD, followed
by “FRQTBL 1”.

6.

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

7. Press the [S] key on the clone master to begin data
transmission. When the clone slave starts to receive data,
the green LED will light and “CLONING” will appear on
the LCD. The master unit will display “MASTER”.

8. When the clone master finishes sending data, a
“confirmation” tone will sound and “COMPLETE” will
appear on the LCD. If data transmission failed while cloning,
the Slave unit will produced an error tone and “CLONE
NG” will appear on the LCD.

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

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

11.The master will remain in clone mode after cloning. The
slave unit will return to user mode after a successful cloning.

Notes:

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

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

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

•Clone mode cannot be entered in battery low state.

•A unit cannot be a "Master Unit" if it is unprogrammed. If
the [S] key is pressed, an "error" tone will sound.

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

• MSK signaling is used in cloning.

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

• Clone mode can be used ONLY by the authorized service

personnel.

• The Clone mode setting must be configured as "Disable"
before being delivered to the end-user.

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

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

Cloning Frequency Table

MODEL TK-3212 TK-3217

Type K, M K2, M2 M

Operating
Clone Frequency
Frequency
Table

1 450.000 470.000 440.000
2 452.000 472.000 442.000
3 454.000 474.000 446.000
4 456.000 476.000 448.000
5 458.000 478.000 450.000
6 460.000 480.000 452.000
7 462.000 482.000 454.000
8 464.000 484.000 456.000

9 466.000 486.000 458.000
10 468.000 488.000 460.000
11 470.000 490.000 462.000
12 472.000 492.000 464.000
13 474.000 494.000 466.000
14 476.000 496.000 468.000
15 478.000 498.000 470.000
16 480.000 500.000 472.000
17 482.000 502.000 474.000
18 484.000 504.000 476.000
19 486.000 506.000 478.000
20 488.000 508.000 480.000

(MHz)

450~490 470~512 440~480

4-4. Adding the Data Password

If the Data password is set to the transceiver, you must
enter the password to activate a clone mode. The maximum
length of the password is 6 digits.

The following describes how to enter the password.

1. Press and hold the [S] key for 2 seconds while turning the

transceiver power on.

2. “CLN.LOCK.R”(When the Read authorization password is

set to the transceiver.) / “CLN.LOCK.W” (When the
Overwrite password is set to the transceiver.) is displayed
on the LCD.

3. If the [selector] knob is rotated while “CLN.LOCK.R”/

“CLN.LOCK.W” is displayed, the number (0 to 9) flashes
on the LCD.
When you press the [C>] key, the currently selected
number is determined.
If you press the [A] key, the least digit of the password is
deleted.
If you press the [S] key after entering the password in this
procedure, “FRQTBL 1” is displayed if the entered
password is correct.
If the password is incorrect, “CLN.LOCK.R”/
“CLN.LOCK.W” is redisplayed.

5

TK-3212/3217

REALIGNMENT

■ Flow Chart (Master transceiver)

[<B]+Power ON

Is Data

password

set?

No

Ye s

"CLN.LOCK.R”/“CLN.LOCK.W”

Clone mode

Start the clone function

is displayed.

Enter the password and

then press the [S] key.

Is password

[S]

correct?

No

Ye s

5. Self Programming Mode

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.

5-1. Enter to the Self Programming Mode

Press and hold the [S] key for 2 seconds while turning the
transceiver power on.

When the transceiver enters in the self programming mode,
"1- 1" is displayed 2 seconds after "SELF " is displayed.

Note :

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

If you press the [A] key, the least digit of the password is
deleted.
If you press the [S] key after entering the password in this
procedure, "SELF" is displayed if the entered password is
correct.
If the password is incorrect, "SLF.LOCK.R"/ "SLF.LOCK.W"
is redisplayed.

5-3. Channel Selection Mode

In this mode, the Zone or Channel can be selected.

Press and hold the [S] key for 2 seconds while turning the
transceiver power on to enter self programming mode. When
the transceiver enters in the self programming mode, the
transceiver automatically enters the Channel Selection mode.

2 seconds after displaying "SELF", "1- 1" appears on the LCD.

The setup item for channel selection mode is as follows.

Setup item Display Remarks

Select ∗∗∗ - ∗∗∗ Zone: 1~128

Zone/Channel ∗∗∗ - ∗∗∗ Channel: 1~128

Key operation

Key Key Function

[Selector] Toggle between Zone selection and Channel selection.

[Side1] No action

[Side2] No action

[S] Enter the Item Selection mode

[A] Error tone sounds

[<B] Decrement the blinking Zone/Channel number by 1.

Press and hold to decrement in steps of 10.

[C>] Increment the blinking Zone/Channel number by 1.

Press and hold to decrement in steps of 10.

Note :

If a non-existing Zone-Channel is selected and the memory
for all 128 channels is already filled, an error tone will sound
and "MEM.FULL" will appear on the LCD for 2 seconds.

5-2. Adding the Data Password

If the Data password is set to the transceiver, you must
enter the password to activate a self programming mode. The
maximum length of the password is 6 digits.

The following describes how to enter the password.

1. Press and hold the [S] key for 2 seconds while turning the

transceiver power on.

2. "SLF.LOCK.R"(When the Read authorization password is

set to the transceiver.) / "SLF.LOCK.W" (When the
Overwrite password is set to the transceiver.) is displayed
on the LCD.

3. If the [selector] knob is rotated while "SLF.LOCK.R"/

"SLF.LOCK.W" is displayed, the number (0 to 9) flashes on
the LCD.
When you press the [C>] key, the currently selected
number is determined.

6

5-4. Item Selection Mode

In this mode, the following items can be selected.

• RX frequency

• RX signaling

• TX frequency

• TX signaling

•Wide/ Narrow

• RF power Hi/Low

• Scan Del/Add

• Beat shift on/off

• Compander on/off
When the [S] key is pressed in the Channel Selection mode,

the transceiver enters the Item Selection mode.

REALIGNMENT

[S]+Power ON

Read authorization password /
Overwrite password entry (6 digits)

Self programming mode SELF

Zone

II

Channel selection mode

Data password

Display

SLF.LOCK.R

When the Read
authorization password is
set to the transceiver.

[<B] : Zone/Channel number decrement
[C>] : Zone/Channel number increment

When the Overwrite
authorization password is
set to the transceiver.

SLF.LOCK.W

or

[S]

Item selection mode

[S]

[Selector]

[A]

Item setting mode

[S]

[S]

[A]

Zone selection Channel selection

Channel

TK-3212/3217

Key operation

Key Key Function

[Selector] The selected item changes

[Side1] No action

[Side2] No action

[S] Enter the Item Setting mode

[A] Return to the Channel Selection mode

[<B] Error tone sounds

[C>] Error tone sounds

5-5. Item Setting Mode

In this mode, the selected item in the Item Selection mode

can be programmed.

When the [S] key is pressed in the Item Selection mode,

the transceiver enters the Item Setting mode.

The setup items for item setting mode are as follows.

Setup item Display Remarks

1.RX frequency 1. RX FREQ→Receive frequency

2.RX signaling 2. RX SIG

3.TX frequency 3. TX FREQ

4.TX signaling 4. T X SIG

5. Wide / Narrow 5. BAND ∗ W / N

6.

RF power Hi / Low

7.Scan Del / Add 7. SCN ∗∗∗ DEL / ADD

8.Beat shift on / off 8. SFT ∗∗∗ ON / OFF

9.

Compander on / off

Key operation

Key Key Function

[Selector] Changing the selection item (RX/ TX frequency and

[Side1] No action

[Side2] No action

[S] • Store the current settings and return to the Item

[A] Abort the current settings and return to the Item

[<B] Toggle/ Decrease the blinking value.

[C>] Toggle/ Increase the blinking value.

RX/ TX signaling only)

Selection mode.

•A MHz digit of the frequency blinks.

(RX/ TX frequency only)

• The icon of the current signaling configuration blinks.

(RX/ TX signaling only)

Selection mode without backup.

∗∗∗.∗∗∗∗∗

TONE OFF/

QT ∗∗∗.∗ /

DQT∗∗∗N/

DQT∗∗∗I

∗∗∗.∗∗∗∗∗

TONE OFF/

QT ∗∗∗.∗ /

DQT∗∗∗N/

DQT∗∗∗I

6. PWR ∗∗∗ HI / LOW

9. CMP ∗∗∗ ON / OFF

327.00000~550.00000MHz

→

Receive QT/DQT

→

Transmit frequency

327.00000~550.00000MHz

→

Transmit QT/DQT

5-6. Self Programming Mode flow chart

■ Channel selection mode flow chart

■ Item selection mode flow chart

Channel selection mode

[S]

[A]

[A]

[A]

[A]

[A]

1. RX frequency

[Selector]

2. RX signaling

[Selector]

3. TX frequency

[Selector]

4. TX signaling

[Selector]

5. Wide / Narrow

[Selector]

6. RF power Hi / Low

[Selector]

7. Scan Del / Add

[Selector]

8. Beat shift on / off

[Selector]

9. Compander on / off

[Selector]

Item setting mode

[S]

[S]

[S][A]

[S]

[S][A]

[S]

[S][A]

[S]

[S][A]

7

TK-3212/3217

REALIGNMENT

■ Item setting mode flow chart

[1. RX frequency] or
[3. TX frequency]

[S]

[A]

[A]

[A]

[A]

[A]

[A]

[A]

[A]

MHz setting

[Selector]

KHz setting

[Selector]

Channel step

[Selector]

Frequency clear

[Selector]

[2. RX signaling] or
[4. TX signaling]

[S]

OFF

[Selector]

QT

[Selector]

DQT N

[Selector]

DQT I

[Selector]

[<B] / [C>] [S]

[<B] / [C>] [S]

[<B] / [C>] [S]

[S] : Cleared

[S] : Tone off

[<B] / [C>] [S]

[<B] / [C>] [S]

[<B] / [C>] [S]

Current
setting value

Value is not set

Display

450. 00000

--------

450. 00000

450. 00000

STP 5.00K

--------

Display

TONE OFF

67.0QT

023NDQT

023 IDQT

6. Firmware Version Information

Turn the transceiver ON with the [Side1] and [Side2] keys

held down. Then, the version is displayed during holding the
[Side1] and [Side2] keys.

8

[A]:Not

stored

[A]:Not

stored

[A]:Not

stored

[A]:Not

stored

5. Wide / Narrow

[S]

Wide / Narrow selection Wide

[S] : Stored

6. RF power Hi / Low

[S]

Hi / Low selection Hi Low

[S] : Stored

7. Scan Del / Add

[S]

Del / Add selection Del Add

[S] : Stored

[8. Beat shift on / off] or
[9. Compander on / off]

[S]

on / off selection on off

[S] : Stored

[<B] / [C>]

Narrow

[<B] / [C>]

[<B] / [C>]

[<B] / [C>]

Display

W5.BAND

Display

HI6.PWR

Display

ADD7.SCN

Display

ON8.SFT or

ON9.CMP

TK-3212/3217

DISASSEMBLY FOR REPAIR

Disassembly Procedure

■ Removing the case assembly from the chassis.

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

2. Remove the two screws

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

3

3

4

■ Removing the LCD ASSY from the mounting
hardware

1. Remove the sheet attached to the flat cable connector z.

2. Remove the FPC from the flat cable connector

Note: Be careful not to forget to attach the sheet after the

LCD ASSY is reassembled.

3. Insert a flat-head screwdriver on the right side of the
illumination guide
the right side of the illumination guide from the mounting
hardware

4. Slide the LCD ASSY
the left side of the illumination guide are removed from the
mounting hardware

Sheet

v

.

, then lever the screwdriver to remove

c

b

n

.

c

v

1

.

x

to the right so that the two tabs on

.

4

■ Removing the TX-RX unit from the chassis.

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

2. Remove the eleven screws

.

2

3. Remove the mounting hardware

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

.

/

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

.

Ω

Note: You can remove the TX-RX unit from the chassis without

removing the solder at the positive terminal. However,
in this case, you can not attach the packing (G53-1605-

03) that is on the positive terminal to the chassis in
assembling. So, it is advisable to remove the solder on
the positive terminal first.

6. Remove the FPC from the flat cable connector

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

8

11

8

13

fixing the TX-RX unit.

,

of the SP / MIC.

.

8

8

9

8

8

8

7

.

≈

.

ç

10

12

1

2

Sheet

Mounting hardware

Illumination guide

6

3

■ Removing the battery release lever from the case
assembly.

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

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

Note: Scratch and widen the glue hole if there is difficulty in

removing the other end of the shaft.
No glue is required when you reassemble the battery
release lever.

5

x

.

2

1

z

.

9

TK-3212/3217

DISASSEMBLY FOR REPAIR

Precautions for Reassembly

■ Attaching the battery release lever to the case
assembly.

1. Insert one side of the shaft into the hole at the lever fitting

section on the case assembly

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

above the two tabs of the lever.

2. Tilt the battery release lever slightly forward

thick spring (G01-4542-04) is positioned below the case
surface.

3.

With the thick spring positioned below the case surface, attach
the other side of the shaft to the case assembly by pressing
the battery release lever

Note: Be careful not to tilt the battery release lever too

forward.
If the battery release lever is pushed in this state where
the two tabs come below the case surface, there is a
possibility of damaging the two tabs.

Tw o tabs

A thick spring

c

.

z

, so that the

x

until it snaps into place v.

A thin spring

Shaft

2

1

■ Attaching the positive terminal to the chassis.

Always attach the positive terminal to the chassis, using
the following procedures, before mounting the TX-RX unit
onto the chassis.

1. Remove the holder assembly
the positive terminal.

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

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

2

c

.

.

v

1

4

from the packing z of

x

3

3

4

■ Assembling the battery release lever

1. Place the lever x onto the stopper z.

2. Place the thick spring

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

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

5

b

.

4

3

2

onto the lever.

c

6

onto the

v

n

■ Mounting the chassis to the case assembly.

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

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

.

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

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

.

c

Note: Take care that the speaker lead wire is not caught by

the microphone element.

4. Press the chassis
attach them.

. Make sure the speaker is securely inserted.

x

1

.

z

2

and the case assembly together to

v

10

1

TK-3212/3217

DISASSEMBLY FOR REPAIR

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

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

3

4

4

■ LCD ASSY Installation Procedure

1. Insert the two tabs on the left side of the illumination guide
into the matching slots of the mounting hardware

2. Insert the tab on the right side of the illumination guide into
the mounting hardware using a pair of tweezers
press the illumination guide down until it snaps into place

.

c

3. Ensure that the tab of the illumination guide is fully inserted
into the mounting hardware.

x

z

, then

.

■ Connecting the speaker wires to the TX-RX unit

1. To connect the speaker wires, solder them to the speaker
terminals of the TX-RX unit

2. Align the speaker wires as shown in figure, making sure to
avoid the legs of the discriminator.

3. Attach the fibrous sheet to the speaker wires as shown by
the silk print on the TX-RX unit

2

legs of the discriminator

Fibrous sheet

z

SP-

.

x

1

SP+

.

Silk print

■ Attaching the antenna receptacle to the chassis.

Screw the antenna receptacle to the chassis in the order
shown in the drawing so that the antenna receptacle comes
to the center of the case hole.

1

1

2

3

Ensure that the tab of the illumination guide
is fully inserted into the mounting hardware.

Tighten this screw first.

Tighten this screw second.

■ The nuts of the volume knob and channel knob

Note that the shapes, colors and heights of nuts of the
volume knob and channel knob are different from one
another. (The nut of volume knob is silver, and the nut of
channel knob is gold)
Use the following jig when removing the nuts of the
volume knob and channel knob.

●

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

Volume Knob

(Silver)

Channel Knob

(Gold)

11

TK-3212/3217

Q202

C214

RX_W/N

(IC405)

R211

R213

CD201

IFOUT

QUAD

IC201
FM IF SYSTEM

5R

AFOUT

Q203

L : Wide
H : Narrow

CIRCUIT DESCRIPTION

1. Frequency Configuration

The receiver utilizes double conversion. The first IF is 38.85
MHz and the second IF is 450 kHz. The first local oscillator
signal is supplied from the PLL circuit.

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

TX/RX: 450 ~ 490MHz (TK-3212(K,M))

ANT

470 ~ 512MHz (TK-3212(K2,M2))
440 ~ 480MHz (TK-3217(M))

ANT SW

RF

AMP

TX: 450 ~ 490MHz

(TK-3212(K,M))
470 ~ 512MHz
(TK-3212(K2,M2))
440 ~ 480MHz
(TK-3217(M))

TX
AMP

MCF

38.85MHz

RX:

411.15 ~ 451.15MHz
(TK-3212(K,M))

431.15 ~ 473.15MHz
(TK-3212(K2,M2))

401.15 ~ 441.15MHz
(TK-3217(M))

RF

AMP

IF SYSTEM

38.4MHz

X3 multiply

CF

450kHz

PLL
VCO

TCXO

AF

AMP

MIC
AMP

12.8MHz

Fig. 1 Frequency configuration

2. Receiver

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

ANT

BPF

MIXER

Q204

1st Local

AF VOL

MCF

XF201

IC302

AF PA

IF AMP

Q203

ANT SW

IC201

IF,MIX,DET

RF AMP

Q205

BPF

TUNE TUNE

CF201

IC301

AQUA-L

MIC

SP

3) IF Amplifier Circuit

The first IF signal is passed through a four-pole monolithic
crystal filter (XF201) to remove the adjacent channel signal.
The filtered first IF signal is amplified by the first IF amplifier
(Q203) and then applied to the lF system IC (IC201). The IF
system IC provides a second mixer, second local oscillator,
limiting amplifier, quadrature detector and RSSI (Received
Signal Strength Indicator). The second mixer mixes the first

SP

IF signal with the 38.4MHz of the second local oscillator
output (TCXO X1) and produces the second IF signal of
450kHz.
The second IF signal is passed through the ceramic filter
(CF201) to remove the adjacent channel signal. The filtered
second IF signal is amplified by the limiting amplifier and
demodulated by the quadrature detector with the ceramic
discriminator (CD201). The demodulated signal is routed to
the audio circuit.

4) Wide/Narrow Switching Circuit

Narrow and Wide settings can be made for each channel
by switching the demodulation level.
The WIDE (low level) and NARROW (high level) data is
output from IC405, pin 45.
When a WIDE (low level) data is received, Q202 turn on.
When a NARROW (high level) data is received, Q202 turn
off.
Q202 turns off/on with the Wide/Narrow data and the IC201
detector output level is switched to maintain a constant
output level during wide or narrow signals.

Q1

X3 multiply

2nd Local

1) Front End (RF AMP)

The signal coming from the antenna passes through the

transmit/receive switching diode circuit, (D103,D104,D106

and D122) passes through a BPF (L229 and L228), and is

amplified by the RF amplifier (Q205).

The resulting signal passes through a BPF (L214,L212 and

L211) and goes to the mixer. These BPFs are adjusted by

variable capacitors (D203,D204,D205,D206 and D210). The

input voltage to the variable capacitor is regulated by

voltage output from the microprocessor (IC405).

2) First Mixer

12

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

oscillator signal generated in the PLL circuit by Q1 to

produce a first IF frequency of 38.85 MHz.

The resulting signal passes through the XF201 MCF to cut

the adjacent spurious and provide the opitimun

characteristics, such as adjacent frequency selectivity.

X1

TCXO

12.8MHz

Fig. 2 Receiver section

Fig. 3 Wide/Narrow switching circuit

5) Audio Amplifier Circuit

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

TK-3212/3217

CIRCUIT DESCRIPTION

6) Squelch

Part of the AF signal from the IC enters the FM IC (IC201)
again, and the noise component is amplified and rectified
by a filter and an amplifier to produce a DC voltage
corresponding to the noise level.
The DC signal from the FM IC goes to the analog port of
the microprocessor (IC405). IC405 determines whether to
output sounds from the speaker by checking whether the
input voltage is higher or lower than the preset value.
To output sounds from the speaker, IC405 sends a high
signal to the SP MUTE line and turns IC302 on through
Q303,Q304,Q305,Q306 and Q316. (See Fig. 4)

7) Receive Signaling

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

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

RECEIVE SIGNALING

FM IF IC201

IF Amp

IC405

BUSY

CPU

QT/DQT IN

AF CONT

SIGNAL

DTMF

QT/DQT

CLK,DATA,
STD,LOADN

IC301

AQUA-L

IC302

AF PA

Q306,316

SW

Q303,304,305
SW

phase with the 5 or 6.25kHz reference signal from the phase
comparator in IC1. The output signal from the phase
comparator is filtered through a low-pass filter and passed
to the VCO to control the oscillator frequency.(See Fig. 5)

2) VCO

The operating frequency is generated by Q4 in transmit
mode and Q3 in receive mode. The oscillator frequency is
controlled by applying the VCO control voltage, obtained
from the phase comparator, to the varactor diodes (D4 and
D7 in transmit mode and D5 and D9 in receive mode). The
RX pin is set high in receive mode causing Q5 turn on.
The TX pin is set high in transmit mode. The outputs from
Q3 and Q4 are amplified by Q6 and sent to the RF amplifiers.

LPF

LPF

PLL DATA

REF OSC

SP

X1

12.8MHz

D4,7

D5,9

PLL IC IC1

1/N

1/M

Q4

TX VCO

Q3

RX VCO

5kHz/6.25kHz

PHASE

COMPARATOR

5kHz/6.25kHz

Q6

BUFF AMP

Q5, 7

T/R SW

CHARGE

PUMP

Q2

BUFFER

Q9

RF AMP

RX

TX

Fig. 5 PLL circuit

Fig. 4 AF amplifier and squelch

(3) DTMF
The DTMF input signal from the FM IC (IC201) goes to
IC301, the DTMF decoder. The decoded information is then
processed by the CPU.

3. PLL Frequency Synthesizer

The PLL circuit generates the first local oscillator signal for

reception and the RF signal for transmission.

1) PLL

The frequency step of the PLL circuit is 2.5 or 5kHz.
A 12.8MHz reference an oscillator signal is divided at IC1
by a fixed counter to produce oscillator (VCO) output signal
which is buffer amplified by Q2 then divided in IC1 by a
programmable counter. The divided signal is compared in

3) Unlock Detector

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

13

TK-3212/3217

T

CIRCUIT DESCRIPTION

4. Transmitter System

1) Microphone Amplifier

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

IC301

MIC

2) Drive and Final Amplifier

The signal from the T/R switch (D101 is on) is amplified by
the pre-drive (Q101) and drive amplifier (Q102) to 50mW.
The output of the drive amplifier is amplified by the RF power
amplifier (Q103) to 4.0W (1W when the power is low). The
RF power amplifier consists of two MOS FET stages. The
output of the RF power amplifier is then passed through
the harmonic filter (LPF) and antenna switch (D103 and
D122) and applied to the antenna terminal.

From

T/R SW

(D101)

Fig. 7 Drive and final amplifier and APC circuit

3) APC Circuit

The APC circuit always monitors the current flowing through
the RF power amplifier (Q103) and keeps a constant current.
The voltage drop at R127, R128 and R129 is caused by the
current flowing through the RF power amplifier and this
voltage is applied to the differential amplifier IC101(1/2).
IC101(2/2) compares the output voltage of IC101(1/2) with
the reference voltage from IC405. The output of IC101(2/2)
controls the VG of the RF power amplifier and Drive amplifier

AGC

AQUA-L

LPF

IC405

DTMF

CPU

QTVCO

QTTCXO

Fig. 6 Microphone amplifier

Q100

RF

AMP

PCTV

(IC405)

Q101

Pre-DRIVE

AMP

5T

+B

R127

R128

R129

Q102 Q103

DRIVE

AMP

IC101

(1/2)

POWER AMP

VDD

LPF

LPF

RF

IC101

(2/2)

X1

TCXO

D103
D122

ANT

SW

VGVGVD

VCO

LPF

to make both voltages the same.
The change of power high/low is carried out by the change
of the reference voltage.

4) Encode Signalling

(1) QT/DQT
QT,DQT data of the QTTCXO Line is output from pin 28 of
the CPU. The signal passes through a low-pass CR filter
and goes to the TCXO(X1).
The QT,DQT data of the QTVCO Line is output from pin 24
of the CPU. The signal passes through a low pass CR filter,
mixes with the audio signal, and goes to the VCO modulation
input. TX deviation is adjusted by the CPU.

(2) DTMF
High-speed data is output from pin 2 of the CPU. The signal
passes through a low-pass CR filter, and provides a TX and
SP out tone, and is then applied to the audio processor
(IC301). The signal is mixed with the audio signal and goes
to the VCO.
TX deviation is adjusted by the CPU.

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

5. Power Supply

There are four 5V power supplies 5M,5C,5R, and 5T. 5M
for microprocessor is always output while the power is on.
5M is always output, but turns off when the power is turned
off to prevent malfunction of the microprocessor.

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

AN

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

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

6. Control Circuit

The control circuit consists of a microprocessor (IC405) and
its peripheral circuits. It controls the TX-RX unit and transfers
data to the Display unit. IC405 mainly performs the following:

(1) Switching between transmission and reception by the

PTT signal input.

(2) Reading system, group, frequency, and program data

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

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

input.
(6) Transmitting tone and encode data.

1) Frequency Shift Circuit

The microprocessor (IC405) operates at a clock of

7.3728MHz. This oscillator has a circuit that shifts the
frequency by BEAT SHIFT SW (Q407, Q408).

14

TK-3212/3217

CIRCUIT DESCRIPTION

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

11

XOUT

Q408
H:OFF
L:ON

X3

Q407
H:OFF
L:ON

8

IC405

BSHIFT

Fig. 8 Frequency shift circuit

2) Memory Circuit

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

IC405

CPU

IC406

EEPROM

Fig. 9 Memory circuit

3) Low Battery Warning

The battery voltage is checked by the microprocessor.
The transceiver generates a warning tone when the battery
voltage falls below the warning voltage (2) shown in the
table.

SB

R404

88

R406

IC405

BATT

CPU

Fig. 10 Low battery warning

7. Control System

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

microprocessor directly as shown in fig. 11.

Channel selector

49

EN1

71

EN2

IC405

Fig. 11 Control system

CPU

PTT

SIDE 1

SIDE 2

27

74

75

PTT

SW

SW1

SW2

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

the voltage (1) shown in the table during transmission.
Transmission is still allowed.

Note:

The transceiver checks the battery voltage during reception
even when, in the FPU, the Battery Warning status function
is set to “While Transmitting” (default setting).
However, the LED does not blink during reception. The red
LED blinks during transmission. The transceiver is still
usable.

(2) The transceiver immediately stops transmission when

the battery voltage falls below the voltage (2) shown in
the table. A warning tone sounds while the PTT switch
is pressed.

Ni-MH Battery

(1) 6.2[V]

(2) 5.8[V]

15