Kenwood TK-3310 Service Manual

UHF FM TRANSCEIVER

TK-33 10

SERVICE MANUAL

CONTENTS

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

SYSTEM SET-UP .........................................3

Whip antenna (T90-1039-25)

Button knob (PTT) (K29-9425-03)

Button knob (SIDE1/SIDE2) (K29-9426-03)

Key top (7key) (K29-9463-12)

Knob (Selector) (K29-9427-03)

Knob (Volume) (K29-9309-13)

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

DISASSEMBLY FOR REPAIR ...................10

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

SEMICONDUCTOR DATA .........................18

COMPONENTS DESCRIPTION ................19

PARTS LIST ...............................................20

EXPLODED VIEW ......................................27

PACKING ...................................................28

ADJUSTMENT ...........................................29

PC BOARD

TX-RX UNIT (X57-7890-71) ....................34

SCHEMATIC DIAGRAM ............................38

BLOCK DIAGRAM .....................................44

LEVEL DIAGRAM ......................................46

OPTIONAL ACCESSORIES

KNB-29N (Ni-MH Battery Pack) ............47

KNB-45L (Li-ion Battery Pack) .............47

KNB-53N (Ni-MH Battery Pack) ............47

Plastic cabinet assy (A02-4188-03)

This product complies with the RoHS directive for the European market. This product uses Lead Free solder.

KMC-48GPS (GPS Speaker Microphone)

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

..47

TK-3310

Document Copyrights

rights reserved.

No part of this manual may be reproduced, translated, distributed, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, for any purpose without the prior written permission of JVC KENWOOD Corporation.

Disclaimer

While every precaution has been taken in the preparation of this manual, JVC KENWOOD Corporation assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein. JVC KENWOOD Corporation reserves the right to make changes to any products herein at any time for improvement purposes.

Firmware Copyrights

The title to and ownership of copyrights for firmware embedded in Kenwood product memories are reserved for JVC KENWOOD Corporation. Any modifying, reverse engineering, copy, reproducing or disclosing on an Internet website of the firmware is strictly prohibited without prior written consent of JVC KENWOOD Corporation. Furthermore, any reselling, assigning or transferring of the ﬁ rmware is also strictly prohibited without embedding the ﬁ rmware in Kenwood product memories.

GENERAL

INTRODUCTION

SCOPE OF THIS MANUAL

This manual is intended for use by experienced tech ni cians familiar with similar types of commercial grade com mu ni ca tions equipment. It contains all required service in for ma tion 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 is sued as required.

ORDERING REPLACEMENT PARTS

When ordering replacement parts or equipment in for ma tion, the full part identiﬁ cation number should be in clud ed. 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 sufﬁ cient description of the re quired component for proper identiﬁ cation.

PERSONAL SAFETY

The following precautions are recommended for personal

safety:

• DO NOT transmit until all RF connectors are veriﬁ ed se cure and any open connectors are properly terminated.

• SHUT OFF and DO NOT operate this equipment near elec tri cal blasting caps or in an explosive atmosphere.

• This equipment should be serviced by a qualiﬁ ed tech ni cian only.

SERVICE

This transceiver is designed for easy servicing. Refer

to the sche mat ic diagrams, printed circuit board views, and align ment procedures contained within.

Model Type TX-RX unit

X(LMR)

TK-3310

X57-7890-71

X(CB)

Frequency

range

RX 450~520MHz TX 450~500MHz

476.4250

~477.4125MHz

Remarks

IF1: 38.85MHz LOC: 38.4MHz

SYSTEM SET-UP

TK-3310

Merchandise received

Choose the type of transceiver

Transceiver programming

Are you using the optional antenna?

Are you using the speaker microphone?

Delivery

Frequency range (MHz) RF power Type

RX 450~520 TX 450~500

TX/RX 476.4250~477.4125

A personal computer, programming interface (KPG-22A/22U), and FPU (programming software) 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

KMC-21, KMC-45 or KMC-48GPS

Speaker microphone

5.0W

(Option)

TK-3310 X(LMR)

TK-3310 X(CB)

1. Modes

User mode

PC mode

PC test mode

Wireless clone mode

Firmware version information mode

Self-programming mode

Mode Function

User mode For normal use. PC mode

Used for communication between the transceiver and PC.

REALIGNMENT

Data programming mode

PC tuning mode

Mode Function

Data programming mode

PC test mode Wireless clone

mode Firmware version

information mode Self-programming

mode

Used to read and write frequency data and other features to and from the transceiver.

Used to check the transceiver using the PC. This feature is included in the FPU.

Used to transfer programming data from one transceiver to another.

Used to conﬁ rm the internal ﬁ rmware version. You can program the frequency, signaling and

other functions using only the transceiver.

2. How to Enter Each Mode

Mode Operation

User mode Power ON PC mode Received commands from PC Wireless clone mode [<B] + Power ON (Two seconds) Firmware version

information mode Self-programming mode [S] + Power ON (Two seconds)

[Side1] + [Side2] + Power ON (Two seconds)

TK-3310

REALIGNMENT

3. PC Mode

3-1. Preface

The transceiver is programmed by using a personal computer, a programming interface (KPG-22A/22U, USB adapter (KCT-53U)) and programming software (KPG-152D).

The programming software can be used with a PC. Figure 1 shows the setup of a PC for programming.

3-2. Connection Procedure

1. Connect the transceiver to the personal computer with

the interface cable and USB adapter (when the interface

cable is KPG-22A, the KCT-53U can be used).

Note:

• You must install the KPG-22U driver in the computer to

use the USB programming interface cable (KPG-22U).

• You must install the KCT-53U driver in the computer to

use the USB adapter (KCT-53U).

• When using the USB adapter (KCT-53U) for the ﬁ rst time,

plug the KCT-53U into a USB por t on the computer with

the computer power ON.

2. When the POWER is switched on, you can immediately

enter user mode. When the PC sends a command, the

transceiver enters PC mode. When data is transmitting from the transceiver, the red

LED lights. When data is receiving by the transceiver, the green LED

lights.

3-6. Programming Software KPG-152D Description

The KPG-152D is the programming software for the transceiver supplied on a CD-ROM. This software runs under windows XP, Vista or 7 on a PC. The software on this disk allows a user to program the transceiver via Programming interface cable (KPG-22A/22U).

3-7. Programming with PC

If data is transferred to the transceiver from a PC with the FPU, the data for each set can be modiﬁ ed.

Data can be programmed into the EEPROM in RS-232C format via the SP/MIC jack.

In this mode the PTT line operate as TXD and RXD data lines respectively.

FPU

KPG-22A or KPG-22U or KPG-22A+KCT-53U Illustration is KPG-22A.

Note:

• The data stored in the personal computer must match Model Name and Model Type when it is written into the EEPROM.

• Do not press the [PTT] key during data transmission or reception.

3-3. KPG-22A Description (PC programming interface cable: Option)

The KPG-22A is required to interface the transceiver with

the computer. It has a circuit in its D-sub connector case that converts the RS-232C logic level to the TTL level.

The KPG-22A connects the SP/MIC connector of the

transceiver to the RS-232C serial port of the computer.

3-4. KPG-22U Description (USB programming interface cable: Option)

The KPG-22U is a cable which connects to a USB port

on a computer.

When using the KPG-22U, install the supplied CD-ROM

(with driver software) in the computer. The KPG-22U driver runs under Windows XP, Vista or 7.

3-5. KCT-53U Description (USB adapter: Option)

The KCT-53U is a cable which connects the KPG-22A to

a USB port on a computer.

When using the KCT-53U, install the supplied CD-ROM

(with driver software) in the computer. The KCT-53U dr iver runs under Windows 2000, XP or Vista (32-bit).

D-SUB

(9-pin)

Tuning cable (E30-3216-05)

KPG-22A

Gray Gray/Black

1.5D-XV Lead wire

1.5D-XV Shield wire

USB

KPG-22U

TransceiverTransceiver Transceiver

USB

KCT-53U

KPG-22A

Fig. 1

– +

MIC

–

REALIGNMENT

TK-3310

4. Wireless Clone Mode

4-1. Outline

“Wireless Clone Mode” copies the transceiver data to an-

other 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 source and clone target/s must be in wireless

clone mode.

4-3. Operation

1. To switch the clone target/s to Wireless 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 source to Wireless 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 target/s.

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

8. When the clone source ﬁ nishes sending data, a “conﬁ rmation” tone will sound and “COMPLETE” will appear on the LCD. If data transmission failed while cloning, the target 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 target unit when it is returned to User mode.

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

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

Note:

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

• If the transceivers wireless clone mode is conﬁ gured as “Disabled”, the transceiver cannot enter Clone mode.

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

• Wireless clone mode cannot be entered in battery low state.

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

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

• Wireless clone mode can be used ONLY by the authorized service personnel.

• The wireless clone mode setting must be conﬁ gured as “Disable” before being delivered to the end-user.

• To wireless clone, replace the antenna from both the source transceiver and the target transceiver with a dummy load.

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

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 [<B] 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) ﬂ ashes on the LCD.

When you press the [C>] key, the currently selected num-

ber 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,

is redisplayed. (with error tone)

“CLN.LOCK.R”/ “CLN.LOCK.W”

• Clone frequency table

Operating frequency

X(LMR): 450~520 (MH

No.

Frequency(MHz) CB CH No. CH Type

1 450.000 9 simplex 476.6250 2 452.000 49 simplex 476.6375 3 454.000 10 simplex 476.6500 4 456.000 12 simplex 476.7000 5 458.000 53 simplex 476.7375 6 460.000 14 simplex 476.7500 7 462.000 16 simplex 476.8000 8 464.000 57 simplex 476.8375

9 466.000 18 simplex 476.8500 10 468.000 20 simplex 476.9000 11 470.000 21 simplex 476.9250 12 472.000 24 simplex 477.0000 13 474.000 65 simplex 477.0375 14 476.000 26 simplex 477.0500 15 478.000 28 simplex 477.1000 16 480.000 29 simplex 477.1250 17 482.000 30 simplex 477.1500 18 484.000 39 simplex 477.3750 19 486.000 40 simplex 477.4000 20 488.000 80 simplex 477.4125

Operating frequency

X(CB): 476.4250~477.4125 (MHz)

Frequency(MHz)

TK-3310

REALIGNMENT

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.

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 Over-

write 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) ﬂ ashes on the

LCD. When you press the [C>] key, the currently selected num-

ber 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, “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.

Key operation

Key Key Function

[Selector]

[Side1] No action [Side2] No action

[S] Enter the Item Setting mode [A] Return to the Channel Selection mode

[<B]

[C>]

Toggle between Zone selection and Channel selection

Decrement the blinking Zone/Channel number by 1. Press and hold to decrement in steps of 10.

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 ﬁ lled, an error tone will sound and “MEM.FULL” will appear on the LCD for 2 seconds.

5-4. Item Selection Mode

In this mode, the following items can be selected.

• RX frequency

• RX signaling

• TX frequency

• TX signaling

• RF power Hi/Low (LMR model only)

• Scan Del/Add (LMR model only)

• Beat shift on/off (LMR model only)

• Compander on/off (LMR model only)

When the [S] key is pressed in the Channel Selection mode, the transceiver enters the Item Selection mode.

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

The setup item for channel selection mode is as follows.

Setup item Display Remarks

Select

Zone/Channel

***

- ***

***

Zone: 1~128

Channel: 1~128

REALIGNMENT

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

Receive frequency

1. RX FREQ

✽

1. RX frequency

2. RX signaling ✽2

3. TX frequency

4. TX signaling ✽4

RF power Hi/Low ✽5 5. PWR

6. Scan Del/Add Beat shift on/off ✽5 7. SFT

7. Compander on/off ✽5 8. CMP

✽

1: The channel frequency step size can be changed only for



2. RX SIG TONE OFF/ QT DQT DQT

3. TX FREQ

✽

4. TX SIG TONE OFF/ QT DQT DQT

✽

5 6. SCN

***.*****

***.*

*** ***

***.*****

***.*

*** ***

***

the LMR model. The CB model has a ﬁ xed step size of

12.5 kHz.

✽

2: The LMR model can select from TONE OFF, QT, DQTN

or DQTI if the setting item is RX signaling. The CB model can only select from TONE OFF, QT or DQTN. DQTI is not available on the CB model.

✽

3: On the CB model, the RX frequency setting value is dis-

played because the TX frequency cannot be edited.

✽

4: On the CB model, the RX signaling setting value is

displayed because the TX signaling cannot be edited. The LMR model can select from TONE OFF, QT, DQTN or DQTI if the setting item is TX signaling. The CB model can only select from TONE OFF, QT or DQTN. DQTI is not available on the CB model.

✽

5: Available only on the LMR model.

X(LMR):

450.00000~520.00000MHz X(CB):

476.42500~477.41250MHz



Receive QT/DQT N/ I

Transmit frequency

X(LMR):



450.00000~500.00000MHz

X(CB):

476.42500~477.41250MHz



Transmit QT/DQT

N/ I

HI/LOW

***

DEL/ADD

ON/OFF

TK-3310

Key operation

Key Key Function

[Selector]

[Side1] No action [Side2] No action

[S]

[A]

[<B] Toggle/Decrease the blinking value. [C>] Toggle/Increase the blinking value.

5-6. Self Programming Mode ﬂ ow chart

Channel selection mode ﬂ ow chart

■

[S]+Power ON

Data password

Self programming mode

Channel selection mode

Item setting mode

Changing the selection item (RX/TX frequency and RX/TX signaling only)

• Store the current settings and return to the Item Selection mode without backup.

• A MHz digit of the frequency blinks. (RX/TX frequency only)

• The icon of the current signaling conﬁ guration blinks. (RX/TX signaling only)

Abort the current settings and return to the Item Selection mode without backup.

Display

SLF.LOCK.R

SLF.LOCK.W

Read authorization password / Overwrite password entry (6 digits)

[S]

SELF

[S][A]

Zone selection

[S][A]

[S]

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

When the Read authorization password is set to the transceiver.

When the Overwrite authorization password is set to the transceiver.

1 - 1

Zone Channel

[Selector]

Channel selection

TK-3310

REALIGNMENT

Item selection mode ﬂ ow chart

■

Channel selection mode

1. RX frequency

2. RX signaling

3. TX frequency

4. TX signaling

LMR model only

[A]

5. RF power Hi / Low

6. Scan Del / Add

7. Beat shift on / off

8. Compander on / off

[S]

[Selector]

[S][A]

[S]

Item setting mode ﬂ ow chart

■

[1. RX frequency]

[S]

[A]

MHz setting

[Selector]

kHz setting

[Selector]

Channel step

[Selector]

Frequency clear

[Selector]

[<B] / [C>]

[S] : Cleared

Current setting value

Value is not set

[S]

Display

450. 00000 or

476.42500

--------

450. 00000 or

476. 42500

450. 00000 or

476.42500

STP 5.00K

STP 12.5K

--------

: X(LMR)

: X(CB)

: X(LMR)

: X(CB)

: X(LMR)

: X(CB)

: X(LMR)

: X(CB)

Item setting mode

[A]

[2. RX signaling]

[S]

OFF

[Selector]

DQT N

[Selector]

DQT I

[Selector]

[S] : Tone off

[<B] / [C>]

CB model is excluded.

[S]

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

Display

TONE OFF

QT 67.0

DQT 023N

DQT 023 I

Item setting mode ﬂ ow chart

■

TK-3310

[A]

[3. TX frequency]

[S]

MHz setting

[Selector]

kHz setting

[Selector]

Channel step

[Selector]

Frequency clear

[Selector]

[4. TX signaling]

[S]

OFF

[Selector]

DQT N

[Selector]

DQT I

[Selector]

Current setting value

LMR model only

Value is not set

[<B] / [C>]

[S] : Cleared

LMR model only

[S] : Tone off

[<B] / [C>]

[S]

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

Display

490. 00000 or

476.42500

--------

490. 00000

STP 5.00K

--------

Display

TONE OFF

QT 67.0

DQT 023N

DQT 023 I

: X(LMR)

: X(CB)

LMR model only

5. RF power Hi / Low

[A]: Not stored

[S]

Hi / Low selection

[S] : Stored

6. Scan Del / Add [S]

Del / Add selection

[S] : Stored

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

[S]

on / off selection

[S] : Stored

[<B] / [C>]

Hi Low

[<B] / [C>]

Del Add

[<B] / [C>]

on off

Display

5.PWR HI

Display

6.SCN ADD

Display

7.SFT ON

8.CMP ON

6. Firmware Version Information Mode

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

TK-3310

DISASSEMBLY FOR REPAIR

1. Removing the Case Assembly from the Chassis

1. Remove the selector knob a and volume knob b.

2. Remove the two screws c.

3. Lift and remove the chassis from the case assembly d.

(Use a ﬂ at-blade screwdriver to easily lift the chassis.)

2. Removing the Holder Assembly from the Chassis

1. Remove the holder from the chassis.

Note: Taking care not to cut the speaker and microphone

lead.

2. Detach the solder of speaker and microphone lead from

the PCB beforehand.

3. Remove the packing e from the SP/MIC jack of the TX-

RX unit.

3. Removing the TX-RX unit from the Chassis

1. Remove the eleven screws f ﬁ xing the TX-RX unit.

2. Remove the solder of the antenna terminal with a solder-

ing iron g.

3. Remove the solder of the positive terminal with a solder-

ing iron h.

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 ﬁ rst.

4. Remove the FPC from the ﬂ at cable connector i.

5. Lift and remove the TX-RX unit from the chassis j.

fx2fx2

fx2

4. Removing the Battery Release Lever

Note: To remove the Holder Assy from

the Chassis,use a flat-head screwdriver and insert to this hole.

BLU

YEL

RED

BLK

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 a.

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

assembly b.

Note: Scratch and widen the glue hole if there is difﬁ culty

in removing the other end of the shaft.

No glue is required when you reassemble the battery re-

lease lever.

S-

M-

S+

M+

DISASSEMBLY FOR REPAIR

TK-3310

5. Attaching the Battery Release Lever to the Case Assembly

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

section on the case assembly a.

Caution: The thin spr ing (G01-4543-14) should be posi-

tioned above the two tabs of the lever.

2. Tilt the battery release lever slightly forward b, so that

the 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 c until it snaps into place d.

Caution: Be careful not to tilt the battery release lever

too forward.

If the battery release lever is pushed in this state where

the two tabs come below the case surface, there is a possibility of damaging the two tabs.

A thin spring

Tow tabs

A thick spring

Shaft

6. Assembling the Battery Release Lever

1. Place the lever b onto the stopper a.

2. Place the thick spring c onto the lever.

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

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

7. 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 b from the packing a of the positive terminal.

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

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

TK-3310

DISASSEMBLY FOR REPAIR

8. 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 a.

2. Insert the upper par t of the chassis into the case assembly b.

3. Press the chassis c and the case assembly together to attach them.

Caution: 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 ﬁ ngers.

10. 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 vol-

ume knob and channel knob.

• Jig (Part No.: W05-1012-00)

for Volume knob

(Long)

for Selector knob

(Short)

11. Screw sequence for mounting the

TX-RX unit to the chassis

Attach the TX-RX unit to the chassis using the screws in

the order shown in the drawing below.

9. Attaching the Antenna Receptacle to the Chassis

Screw the antenna receptacle to the chassis in the or-

der shown in the drawing so that the antenna receptacle comes to the center of the case hole.

TX-RX UNIT Component side view

Tighten this screw second.

hten this screw first.

CIRCUIT DESCRIPTION

1. Frequency Conﬁ guration

The receiver utilizes double conversion. The first IF is

38.85MHz and the second IF is 450kHz. The ﬁ rst Local oscillator is supplied from the PLL circuit.

The PLL circuit in the transmitter generates the neces-

sary frequencies.

TK-3310

RX: 450~520MHz,TX: 450~500MHz: X(LMR) TX/RX: 476.4250~477.4125MHz: X(CB)

ANT

AMP

450~500MHz: X(LMR)

476.4250~477.4125MHz: X(CB)

2. Receiver System

The receiver system is shown in Figure 2.

450kHz

1st MIX MCF SP

AMP

MIC

AMP

38.85MHz

411.15~

481.15MHz: X(LMR)

437.5750~

438.5625MHz: X(CB) RF

AMP

System

38.4MHz

multiply

PLL

VCO

baseband

TCXO 19.2MHz

Fig. 1 Frequency conﬁ guration

CF402 CF401

ANT

BPF

ANT

BPF1

Q407

RF AMP XF401

BPF

BPF1 1st Local

Q406

1st MIX

MCF

Fig. 2 Receiver system

2-1. Front End (RF Ampliﬁ er) Circuit

The signal coming from the antenna passes through the transmit / receive switching diode circuit (D201, D202, D203 and D204) and a BPF (L418 and L419), and is then ampliﬁ ed by the RF ampliﬁ er (Q407).

The resulting signal passes through a BPF (L419, L418, L491, L414 and L413) and goes to the mixer. These BPFs are adjusted by variable capacitance diodes (D408, D407, D405, D404 and D403). The input voltage to the variable capacitance diodes is a regulated voltage output from the DC ampliﬁ er (IC811).

Q405

IF AMP

IC401

IF,MIX,DET

Q403

x2 multiply

2nd Local

IC812

baseband

TCXO

19.2MHz

IC815

AF PA

2-2. First Mixer

The signal from the front end is mixed with the ﬁ rst local oscillator signal generated in the PLL circuit by Q406 to produce a ﬁ rst IF frequency of 38.85MHz.

The resulting signal passes through the XF401 MCF to cut the adjacent spurious and provide the optimum characteristics, such as adjacent frequency selectivity.

TK-3310

CIRCUIT DESCRIPTION

2-3. IF Ampliﬁ er Circuit

The ﬁ rst IF signal is passed through a four-pole monolithic crystal ﬁ lter (XF401) to remove the adjacent channel signal. The ﬁ ltered ﬁ rst IF signal is ampliﬁ ed by the ﬁ rst IF amplifier (Q405) and is then applied to the IF system IC (IC401).

The IF system IC provides a second mixer, limiting amplifier, quadrature detector and RSSI (Received Signal Strength Indicator). The second mixer mixes the ﬁ rst IF signal with the 38.4MHz signal of the second local oscillator output (Q403) and produces the second IF signal of 450kHz.

The second IF signal is passed through the ceramic ﬁ lter (Wide: CF402, Narrow: CF401) to remove the adjacent channel signal. The ﬁ ltered second IF signal is ampliﬁ ed by the limiting ampliﬁ er and demodulated by the quadrature detector with the ceramic discriminator (CD401). The demodulated signal is routed to the audio circuit.

2-4. Wide/Narrow Switching Circuit

Wide and narrow settings can be made for each channel by switching the ceramic ﬁ lters CF401 (narrow).

The second IF signal always passes the ceramic ﬁ lters CF402 (Wide).

The wide and narrow switching data is output from the MCU (IC820).

D401 and D402 are switched to ceramic ﬁ lters when a narrow mode is selected.

Q404 turns on/off with the Narrow and the IC401 detector output level is changed to maintain a constant output level during wide or narrow signals.

WID/NAR

Q404

2-5. Audio Ampliﬁ er Circuit

The demodulated signal from IC401 is sent to an AF ampliﬁ er through baseband IC (IC812), and is routed to an audio power ampliﬁ er (IC815) where it is ampliﬁ ed and output to the speaker.

2-6. Squelch Circuit

Part of the AF signal from the IC401 enters the FM system IC (IC401) again, and the noise component is ampliﬁ ed 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 MCU (IC820). IC820 determines whether or not to output sounds from the speaker by checking if the input voltage is higher or lower than the preset value.

To output sounds from the speaker, IC820 sends a high signal to the AF_CONT line and turns IC815 on through Q813, Q814, Q818 and Q819.

3. T ransmitter System

3-1. Microphone Ampliﬁ er Circuit

The signal from the microphone is limited by the AGC circuit, which is composed of D807, D808, Q810, Q811 and the mute switch (Q809). IC812 is composed of a high-pass ﬁ lter, low-pass ﬁ lter and pre-emphasis/IDC circuit.

The signal from the microphone and the low speed data from the MCU (IC820) enter the baseband IC (IC812) and pass through each path and are mixed inside the IC.

The output signal from the baseband IC goes to the VCO modulation input. The other output signal goes to the TCXO modulation input.

C424

IFOUT

R409

R424

CD401

QUAD

AFOUT

IFI

D401

R406

Q401

IC402

R471

R423

IC401

MXO

C404

CF402

C402

Fig. 3 Wide/Narrow switching circuit

CF401

R408

R426

50C AFOUT

D402

R411

C414

R415

MIC

D807,808 Q810,811

MIC_MT

AGC

Q809

IC812

Baseband

LSD OUT

Fig. 4 Microphone ampliﬁ er circuit

VCO

TCXO

CIRCUIT DESCRIPTION

TK-3310

3-2. Drive and Final Ampliﬁ er Circuit

The signal from the T/R switch (D18 is on) is ampliﬁ ed by

the RF AMP (Q201) and pre-drive ampliﬁ er (Q203) to 50mW.

The output of the pre-drive ampliﬁ er is ampliﬁ ed by the

drive ampliﬁ er (Q204) and the RF ﬁ nal ampliﬁ er (Q205) to

5.0W (1W when the power is low). The drive ampliﬁ er and the RF ﬁ nal ampliﬁ er consist of

two MOS FET stages.

The output of the RF final amplifier is then passed

through the harmonic ﬁ lter (LPF) and antenna switch (D201 and D202) and is applied to the antenna terminal.

From

T/R SW

(D18)

Q201 Q205

AMP

Q203

Pre-DRIVE

AMP

R307 R309 R310

Q204

DRIVE

AMP

VDD

3-3. APC Circuit

The APC circuit always monitors the current flowing through the drive ampliﬁ er (Q204) and the RF power ampliﬁ er (Q205) and keeps a constant current. The voltage drop at R307, R309 and R310 is caused by the current ﬂ owing through the RF ﬁ nal ampliﬁ er. This voltage is applied to the differential ampliﬁ er IC301 (1/2).

IC301 (2/2) compares the output voltage of IC301 (1/2) with the reference voltage from IC811. The output of IC301 (2/2) controls the VG of the RF power ampliﬁ er and the drive ampliﬁ er to make both voltages the same.

The change of power high/low is carried out by the change of the reference voltage.

ANT

D201,202

RF FINAL

AMP

ANT

LPF

PC/BPF2

(IC811)

Fig. 5 Drive and ﬁ nal ampliﬁ er and APC circuit

4. Frequency Synthesizer Unit

4-1. Frequency synthesizer

The frequency synthesizer consists of the TCXO (X1),

VCO, PLL-IC (IC1), and buffer ampliﬁ ers.

The TCXO generates 19.2MHz. The frequency stability is

1.5ppm within the temperature range of –30°C to +60°C. The frequency tuning and modulation of the TCXO are done to apply voltage to pin 1 of the TCXO. The output of the TCXO is applied to pin 10 of PLL-IC.

The VCO consists of 2 VCO and covers a dual range of 437.5750~438.5625MHz and 476.4250~477.4125MHz: X(CB) or 411.15~481.15MHz and 450~500MHz:X(LMR). The VCO generates 437.5750~438.5625:X(CB) or

411.15~481.15MHz:X(LMR) for providing the first local signal for reception. The operating frequency is generated by Q5 in transmitting mode and Q4 in receiving mode. The oscillation frequency is controlled by applying the VCO control voltage, obtained from the phase comparator (IC1) to the variable capacitance diodes (D6 and D9 in transmitting mode and D10 and D12 in receiving mode)

IC301

(1/2)

IC301

(2/2)

The TX/RX pin of IC820 goes “high” in transmitting mode, causing Q7 and Q4 to turn off, and Q5 turn on. The TX/RX pin goes “low” in receiving mode.

The output from Q4 and Q5 are ampliﬁ ed by a buffer ampliﬁ er (Q8) and Q2, and then sent to the PLL-IC.

The PLL-ICconsists of a prescaler, reference divider, phase comparator, and charge pump. The input signal from pin 10 and 17 of the PLL-IC is divided down and compared at the phase comparator. The pulsed output signal of the phase comparator is applied to the charge pump and transformed into a DC signal in the loop ﬁ lter (LPF). The DC signal is applied to the CV of the VCO and locked to keep the VCO frequency constant.

PLL data is output from PL_STB (pin 20), PL_CLK (pin 8), and PL_DAT (pin 21) of the MCU (IC820). The data is input to the PLL-IC when the channel is changed or transmission is changed to reception and vice versa. PLL lock condition is always monitored by pin 18 (PL_UL) of the MCU. When the PLL is unlocked, PL_UL goes low.

TK-3310

IC812

Baseband IC

H: OFF L: ON

MCU

XIN

X802

39 40

XOUT XIN

Q807

C854

R857

MCU BSHIFT

CIRCUIT DESCRIPTION

TX/RX (TX: High)

PL_UL

VCO

MCU

IC820

BUFF

IC1

PL_STB,PL_CLK,PL_DAT

PLL

BUFF

D17Q2

AMP

To mixer

TCXO

X1 IC812

SWLPF

D18 SW To

RF AMP

Baseband

Fig. 6 PLL block diagram

5. Control Circuit

The control consists of the MCU (IC820) and its peripheral circuits. It controls the TX-RX unit. IC820 mainly performs the following;

1) Switching between transmission and reception by PTT

signal input.

2) Reading channel information, frequency, and program

data from the memory circuit.

3) Sending frequency program data to the PLL.

4) Controlling squelch on/off via the DC voltage from the

squelch circuit.

5) Controlling the audio mute circuit via the decode data in-

put.

6) Transmitting tone and encode data.

5-1. Frequency Shift Circuit

The MCU (IC820) and baseband IC (IC812) operates at a clock frequency of 19.2MHz. The oscillator circuit has the baseband IC. This oscillator has a circuit that shifts the frequency via Beat shift switch (Q807).

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

5-2. Memory Circuit

The Memory circuit consists of the MCU (IC820) and EEPROM (IC810). The EEPROM has a capacity of 512k bits and stores the channel information, the last channel data, the scan on status, and other parameters.

EEPROM

■

Note:

The EEPROM stores tuning data (Deviation, Squelch,

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

IC820 IC810

MCU

EEPROM

Fig. 8 Memory circuit

5-3. Low Battery Warning

The battery voltage is monitored by the MCU (IC820 pin 63: BATT). When the battery voltage falls below the voltage set by the Low Battery Warning adjustment, the red LED blinks, notifying the operator that it is time to replace the battery (when the always option (default setting) under the Battery Warning function in the FPU is selected). If the battery voltage falls bellow 5.9V, the transceiver does not transmit and the warning tone beeps while the PTT switch is pressed.

Low battery warning Battery status

The red LED blinks during transmission.

The red LED blinks and the warning tone beeps while the PTT switch is pressed.

R824

The battery voltage is low but the transceiver is still usable.

The battery voltage is low and the transceiver cannot be used to make calls.

BATT

IC820

R829

MCU

Fig. 9 Low battery warning

Fig. 7 Frequency shift circuit

+ 36 hidden pages

Kenwood TK-3310 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

GENERAL

SYSTEM SET-UP

1. Modes

REALIGNMENT

2. How to Enter Each Mode

3. PC Mode

4. Wireless Clone Mode

5. Self Programming Mode

6. Firmware Version Information Mode

DISASSEMBLY FOR REPAIR

1. Removing the Case Assembly from the Chassis

2. Removing the Holder Assembly from the Chassis

3. Removing the TX-RX unit from the Chassis

5. Attaching the Battery Release Lever to the Case Assembly

6. Assembling the Battery Release Lever

8. Mounting the Chassis to the Case Assembly

10. The Nuts of the Volume Knob and Channel Knob

9. Attaching the Antenna Receptacle to the Chassis

CIRCUIT DESCRIPTION

2. Receiver System

3. T ransmitter System

4. Frequency Synthesizer Unit

5. Control Circuit