VHF FM TRANSCEIVER
TK-2168
© 2003-8 PRINTED IN JAPAN
B51-8654-00 (S) 157
SERVICE MANUAL
GENERAL ............................................................. 2
SYSTEM SET-UP ................................................. 2
OPERATING FEATURES ..................................... 3
REALIGNMENT .................................................... 4
DISASSEMBLY FOR REPAIR .............................. 5
CIRCUIT DESCRIPTION ....................................... 7
INSTALLATION .................................................. 11
TERMINAL FUNCTION ...................................... 12
SEMICONDUCTOR DATA ................................. 13
COMPONENTS DESCRIPTION ......................... 14
PARTS LIST ........................................................ 15
EXPLODED VIEW ............................................... 23
PACKING ............................................................ 24
ADJUSTMENT ................................................... 25
PC BOARD
TX-RX UNIT (X57-6720-31) .......................... 30
SCHEMATIC DIAGRAM ..................................... 34
BLOCK DIAGRAM .............................................. 38
LEVEL DIAGRAM ............................................... 40
KSC-30 ................................................................ 41
SPECIFICATIONS ............................ BACK COVER
CONTENTS
Knob (CH-SELECTOR)
(K29-9280-13)
Knob (VOLUME)
(K29-9278-13)
Cabinet assy
(A02-3835-33)
Knob (PTT)
(K29-9279-03)
Antenna
(KRA-26: Option)
Does not come with antenna.
Antenna is available as an option.
TK-2168
2
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.
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.
SYSTEM SET-UP
Merchandise received
Choose the type of transceiver
Transceiver programming
A personal computer (IBM PC or compatible), programming
interface (KPG-22), and programming software (KPG-82D)
are required for programming.
(The frequency, TX power HI/LOW, and signalling data are programmed
for the transceiver.)
TX/RX 136~174
5.0W
TK-2168 (A)
Frequency range (MHz) RF power
Type
Delivery
Are you using the speaker microphone?
YES
NO
KMC-17 or KMC-21
Speaker microphone
(Option)
Are you using the optional antenna?
YES
NO
KRA-22 or KRA-26
Optional antenna
Unit
Model
TX-RX Unit
Frequency range
Remarks
& destination
TK-2168
A
X57-6720-31
136~174MHz
IF1 : 49.95MHz
LOC : 50.4MHz
TK-2168
3
OPERATING FEATURES
1. Operation Features
Installing the (Optional) Antenna
Screw the antenna into the connector on
the top of the transceiver by holding the
antenna at its base and turning it clockwise
until secure.
Installing the Belt Clip
Note: When first installing the belt clip, you must remove the
battery pack from the rear of the transceiver.
1
Remove the two screws from the
rear of the transceiver, then remove
the small, plastic black covering that
was held in place.
2
Insert the belt clip mount into the
space on the rear of the transceiver.
3
Using the 2 screws, affix the belt
clip in place.
Note: Do not dispose of the plastic
black covering! If you remove
the belt clip, replace the covering
into the space on the rear of the
transceiver. Either this covering
or the belt clip must be in place,
otherwise the battery pack may
not remain installed properly.
Installing the Cover over the
Speaker/ Microphone Jacks
Note: When installing the speaker/
microphone jack cover, you must
remove the battery pack from the
rear of the transceiver.
If you are not using a speaker/
microphone, install the cover over the
speaker/ microphone jacks using the
supplied screw.
Note: To lift the cover after it has been installed, use a piece
of hardened plastic or metal, such as a small screwdriver.
Lift the cover by its tab, beside the screwhole, taking
care not to damage the cover.
Installing the (Optional) Speaker/ Microphone
Note: When installing the optional
speaker/ microphone and its
locking bracket, you must
remove the battery pack from
the rear of the transceiver.
1
Insert the speaker/ microphone
plugs into the speaker/ microphone
jacks.
2
Attach the locking bracket using the supplied screw.
Note: To lift the locking bracket after it has been installed,
use a piece of hardened plastic or metal, such as a small
screwdriver. Lift the bracket by its tab, beside the
screwhole, taking care not to damage the bracket.
GETTING ACQUAINTED
The transceiver is shown with the optional KNB-24L battery
pack.
q
q
q
q
q LED indicator
Lights red while transmitting. Lights green while receiving.
Flashes orange while receiving a DTMF signal that matches
the one set up in your transceiver. If programmed by your
dealer, flashes red when the battery power is low while
transmitting.
w Channel Switch
Rotate to select a channel from 1 to 16.
e Power switch/ Volume control
Turn clockwise to switch ON the transceiver. Rotate to
adjust the volume. To switch OFF the transceiver, turn
counterclockwise fully.
r AUX key
This is a PF (Programmable Function) key. Press it to activate
its auxiliary function (page 4). The default setting for this
key is None.
t PTT (Push-to-Talk) switch
Press this switch, then speak into the microphone to call a
station.
y Side 1 key
This is a PF (Programmable Function) key. Press it to activate
its auxiliary function (page 4). The default setting for this
key is None.
u Side 2 key
This is a PF (Programmable Function) key. Press it to activate
its auxiliary function (page 4). The default setting for this
key is Squelch Off Momentary. Press each key to activate
its auxiliary function.
i SP/MIC jacks
Connect an optional speaker/ microphone here.
Antenna
Microphone
Speaker
4
1 2
3
5
8
6
7
TK-2168
4
OPERATING FEATURES / REALIGNMENT
Programmable Auxiliary Functions
The AUX, Side 1, and Side 2 keys can be programmed
with the auxiliary functions listed below:
·Monitor Momentary
· Monitor Toggle
· None
· RF Power Low
·Scan
· Scan Temporary Delete
· Scrambler
· Squelch Off Momentary
· Squelch Off Toggle
2. How to Enter Each Mode
Mode
Operation
User mode
Power ON
PC mode
Received commands from PC
1. Modes
Mode
Function
User mode
For normal use.
PC mode
Used for communication between the
radio and PC (IBM compatible).
Data programming
Used to read and write frequency data
mode
and other features to and from the radio.
PC test mode
Used to check the radio using the PC.
This feature is included in the KPG-
82D.
User mode
PC mode
PC test mode
Data programming
mode
PC tuning mode
REALIGNMENT
3.PC Mode
3-1. Preface
The TK-2168 transceiver is programmed using a personal
computer, a programming interface (KPG-22) and programming
software (KPG-82D).
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-2168 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 radio enters PC mode.
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-2168 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-2168 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-2168
to the computer's RS-232C serial port.
3-4. Programming software description
KPG-82D is the programming software for TK-2168
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-2168 and edited
on the screen. The programmed or edited data can be printed
out. It is also possible to tune the transceiver.
Tuning cable
(E30-3216-05)
RF Power meter
or SSG
Gray
+
Gray/Black
1.5D-XV Lead wire
+
1.5D-XV Shield wire
}
}
SP
MIC
KPG-22
KPG-82D
IBM-PC
Fig. 1
TK-2168
5
DISASSEMBLY FOR REPAIR
/
/
,
Packing
1. Separating the case assembly from the chassis.
1. Remove the volume knob
z.
2. Remove the two screws
x.
3. Lift the chassis
c, and remove it from the case assembly.
Note: After separating the case assembly from the chassis,
remove the channel knob.
2. Separating the chassis from the TX/RX unit.
1. Remove the two screws
v fixing the TX/RX unit B/2.
2. Remove the twelve screws
b and two screws n fixing
the TX/RX unit A/2.
3. Remove the solder from the antenna terminal using a
soldering iron
m, then lift the unit off.
z
x
x
c
Channel knob
m
,
.
v
v
b
b
b
b
b
b
b
n
TX/RX UNIT B/2
TX/RX UNIT A/2
3. How to remove the battery terminal block.
1. Remove the two screws /, then pull out the back cover .
2. Remove the screw .
Note: To remove the TX/RX unit B/2, remove the solder using
a soldering iron
..
Note: The two screws
n of TX/RX unit A/2 are fixing the
battery terminal block
,.