Kenwood TK 2107 Service Manual

Page 1

SERVICE MANUAL

© 2000-05 PRINTED IN JAPAN
851-8536-OO(S) 200

Antenna
(T 90-O733-05):M 3

Knob
(CHANNEL SELECTOR)
(095278-03)

KnobNOLUME) - CONTENTS

(K29-5255-03)

GENERAL .................................................................. 2
REALIGNMENT ......................................................... 2
DISASSEMBLY FOR REPAIR .
CIRCUIT DESCRIPTION .
SEMICONDUCTOR DATA ..
DESCRIPTION OF COMPONENTS ........................ 1O
PARTS LIST ........... .. 11
EXPLODED VIEW . .. 17
PACKING ................................................................. 18
Cabinet assy ADJUSTMENT ......................................................... 19
(A02-2448-13) PC BOARD VIEWS
TX-RX UNIT (X57-6020-21) ................................ 23
SCHEMATIC DIAGRAM .......................................... 27
BLOCK DIAGRAM 31
LEVEL DIAGRAM . 33
KNB-15A (Ni-Cd BATTERY) 34
SPECIFICATIONS ................................ BACK COVER

TK-2107 (16 channels)

Page 2

TK-21 O7

GEN ERAL/REALIGNM ENT

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 data. 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.

REALIGNMENT
1 Modes
User Mode l PC Mode Manufacture Model
MODE FUNCTION
User Mode Use this mode for normal operation.

PC Mode Use this mode, to make various
settings by means of the FPU through
the RS-232C port.

Use this mode, to realign the various
settings through the RS-2320 port

during manufacture work.

Manufacture Mode

2 How to enter each mode

MODE PROCEDURE
User Mode Power ON
PG Mode Connect to the IBM PC compatible

machine and controled by the FPU.

Antenna

Microphone @@ ©

PERSONAL SAFETY
The following precautions are recommended for personal

safety :

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

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

- This equipment should be serviced by a qualified
technician only.

SERVICE

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

Destnation Number of CH RF power output
M3 16 SW

3 Getting acquainted

(D PTT (Push-To-Talk) switch
Press this switch, then speak into the microphone to
call a station. Release the switch to receive.

(2) Monitor key
Press and hold to monitor how busy the current
channel is and to monitor signals being received that
do not contain the matched QT/DQT code.

@ Channel selector
Rotate to select channels 1 ~ 16.

G) LED indicator
Lights red while transmitting, green while receiving a
signal. Flashes red when the battery voltage is low
while transmitting.

© Power switch/ Volume control
Turn clockwise to switch the transceiver ON. Turn
counterclockwise until a click sounds, to switch the
transceiver OFF. Rotate to adjust the volume level.

Speaker

Speaker/
microphone
jacks