Kenwood TK-373G User manual

UHF FM TRANSCEIVER
TK-373G
©2002-1 PRINTED IN JAPAN
B51-8618-00 (S) 931
SERVICEMANUAL
GENERAL ......................................................................2
SYSTEM SET-UP ..........................................................2
OPERATING FEATURES..............................................3
REALIGNMENT .............................................................7
DISASSEMBLY FOR REPAIR.....................................10
CIRCUIT DESCRIPTION .............................................11
SEMICONDUCTOR DATA ..........................................15
DESCRIPTION OF COMPONENTS............................16
PARTS LIST.................................................................18
EXPLODED VIEW .......................................................25
PACKING .....................................................................26
CONTENTS
ADJUSTMENT .............................................................27
PC BOARD VIEWS
DISPLAY UNIT (X54-3250-11)...............................37
TX-RX UNIT (X57-650X-XX)..................................39
SCHEMATIC DIAGRAM ..............................................45
BLOCK DIAGRAM .......................................................49
LEVEL DIAGRAM ........................................................51
KNB-14/KNB-15A (Ni-Cd BATTERY) ..........................52
KNB-20N (Ni-MH BATTERY).......................................52
KMC-17/KMC-21 (SPEAKER MICROPHONE)............53
SPECIFICATIONS ................................... BACK COVER
Knob (ENCODER)
(K29-5331-03)
Knob (VOLUME)
(K29-5332-03)
Cabinet assy
(A02-3568-33)
Button knob (PTT)
(K29-5334-13)
Key top (4 keys)
(K29-9142-02)
Button knob
(MONI/LAMP)
(K29-5333-13)

TK-373G
2
Unit
Model & TX-RX Unit Display Unit Frequency range Remarks
destination
K X57-6500-10 450~470MHz IF1 : 49.95MHz
TK-373G K2 X57-6500-11 X54-3250-11 470~490MHz LOC : 50.4MHz
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.
PERSONNEL SAFETY
The following precautions are recommended for personnel
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
License and frequency allocated by FCC
Choose the type of transceiver
Transceiver programming
Are you using the optional antenna?
A personal computer (IBM PC or compatible), programming interface (KPG-22),
and programming software (KPG-76D) are required for programming.
(The frequency, TX power HI/LOW, and signalling data are programmed for the transceiver.)
YES
NO
KRA-15
Whip antenna
(Option)
Delivery
Are you using the speaker microphone? YES
NO
KMC-17 or KMC-21
Speaker microphone
(Option)
TX/RX 470~490
TK-373G K2
Frequency range (MHz) RF power Type
4.0W
TX/RX 450~470 4.0W
TK-373G K

TK-373G
3
OPERATING FEATURES
1. Operating Features
The transceiver is shown with the optional KNB-14 battery pack.
qq
qq
qRotary encoder
Your dealer can program the encoder as either
System Up/Down or Group Up/Down. Rotate to
select a system or group.
ww
ww
wTransmit/ Battery low indicator
This red LED lights during transmission. If
programmed by your dealer, when the battery pack
power is low, the LED flashes during transmission.
Replace or recharge the battery pack at such a time.
ee
ee
ePower switch/ Volume control
Turn clockwise to switch ON the transceiver. Rotate
to adjust the volume. To switch OFF the transceiver,
turn counterclockwise fully.
rr
rr
rPTT (Push-to-Talk) switch
Press this switch, then speak into the microphone to
call a station.
tt
tt
tSide 1 key
This is a PF (Programmable Function) key.
yy
yy
ySide 2 key
This is a PF (Programmable Function) key.
uu
uu
uA, B, ∞∞
∞∞
∞,55
55
5keys
These are PF (Programmable Function) keys.
ii
ii
iSpeaker /Microphone jacks
Connect an optional speaker/ microphone here.
oo
oo
oDisplay
Note: The PF keys are programmed with default functions:
• Side 1 key: Lamp
• Side 2 key: Squelch Off Momentary
• A key: None
• B key: None
•∞∞
∞∞
∞ key: Group Down
•55
55
5 key: Group Up
qq
qq
qee
ee
e
rr
rr
r
tt
tt
t
yy
yy
y
uu
uu
u
ii
ii
i
ww
ww
w
Antenna
Microphone
Speaker
oo
oo
o
Programmable Auxiliary Functions
You can program the Side 1,Side 2,A, B, ∞∞
∞∞
∞, and 55
55
5keys
with the functions listed below.
•Aux
• Display Character
• DTMF ID (BOT)
• DTMF ID (EOT)
• Group Down
• Group Up
• Home Group
• Key Lock
• Lamp
• Memory (RCL)
• Memory (RCL/STO)
• Memory (STO)
• Monitor Momentary
• Monitor Toggle
• None (No function)
• Redial
• RF Power Low
• Scan
• Scan Del/Add
• Scan Temporary Delete
• Squelch Off Momentary
• Squelch Off Toggle
• System Down
• System Up
• Telephone Disconnect
Display
nocI noitpircseD
sipuorgdetcelesehtnehwsraeppA .ytiroirpsademmargorp
sipuorgdetcelesehtnehwsraeppA .dnuorAklaTsademmargorp
sademmargorpyekehtnehwsraeppA
rotinoM .desserpsi
sraeppa,relaedruoyybdemmargorpfI .DInaevieceruoynehw
.edomnacSgnisuerauoynehwsraeppA
ehtnorewopwolgnisunehwsraeppA .puorgdetceles
ehtnehwsraeppa,noitarepodeknurtnI sademmargorpsipuorgdetceles .sDIenohpelet
sidetcelesehtnehwsraeppA .ecneuqesgninnacsehtmorfdevomer
.srebmunpuorgdnametsysehtsyalpsiD dnametsysmargorpnacrelaedruoY ni,sretcarahc8otpuhtiwsemanpuorg srebmunfoecalp
metsys

TK-373G
4
OPERATING FEATURES
2. Programmable keys
The functions the FPU programs to the function keys are
described in the following sections.
1) AUX
If this key is pressed, a dot appears at the extreme right of
the LCD and AUX port which is inside of the transceiver
turns to the active level. If pressed again, the dot disappears
and the AUX ports turns to the deactive level.
2) Display character
This key switches the LCD display between the system/
group number and system/group name.
3) DTMF ID (Begin of TX)
Pressing this key in Conventional mode, automatically sends
the preset DTMF ID (Begin of TX).
4) DTMF ID (End of TX)
Pressing this key in Conventional mode, automatically sends
the preset DTMF ID (End of TX).
5) Group up/down
When the key is pressed each time, the group number to
be selected is incremented/decremented and repeats if held
for one second or longer.
6) Home group
Each pressing of the key selects a preset system/group.
7) Key lock
Pressing this key causes the transceiver to accept entry of
only the [Monitor Toggle], [Key Lock], [PTT], [Lamp], [Monitor
Momentary], [Squelch off Momentary], and [Squelch off
Toggle] keys.
8) Lamp
This key illuminates the LCD and keys on the front panel.
When the key is pressed, the LED lamp goes on.
When it is released, the lamp goes off after about five
seconds. If any key is pressed while the LED lamp is on,
the lamp is kept on for five seconds.
9) Memory
This key allows DTMF memory data to be recalled; up to 32
memories each with a memory dial of up to 16 digits
and an A/N of up to 8 digits per memory.
10) None
An error operation beep sounds, and no action will occur.
Use this function when the transceiver is required to be
operated more simply.
11) Redial
Pressing this key when System/Group is shown, displays
the previously transmitted DTMF code. Pressing [PTT] at
this time, transmits the code that is currently displayed.
12) RF power low
Used to temporarily switch transmission output to low power.
Turning the function on enables:
Hi→Low, Low→Low
Key states are backed up, except in the PC mode when
they are reset.
13) Scan
Pressing this key starts scanning. Pressing this key again
stops scanning.
14) Scan Del/Add
Usedtoselectwhethersystemscanroutinesareusedduring
system scan. Each pressing of the key (to ON) toggles
between lockout and lock. The scan routine is started when
on lock. The DEL indicator flashes when the system is on
lockout.
15) Scan temporary delete
This key is temporarily deleted a system being scanned. If
you press this key when scan is stopped (when a call is
being received from another station), the system is
temporarily deleted and scanning restarts.
This key operates even when “Scan Type” is set to “List
Type System Scan”.
16) Squelch off
Used to release signalling or squelch when operating in
conventional mode.
17) System up/down
When the key is pressed each time, the system number to
be selected is incremented/decremented and repeats if held
for one second or longer.
18) Telephone disconnect
Pressing this key ends an RIC connection (disconnects the
telephone line).
3. Scan Operating
1) System scan
System scan can be selected with the “Scan” key by
programming the scan feature. When the “Scan” key is pressed
and the “SCN”’ mark appears, scan mode in entered. Scanning
starts from the system following the currently displayed system.
When a call is received, scanning stops, and the system and
group are displayed.
When the system knob or programming key is touched
during scanning, the scan stops and the revert system or group
can be changed. Scanning resumes one second after the key
is released.
System Scan consists of the following 2 types.
●Fix system scan
All the set systems except locked-out ones are scanned. If
the DEL/ADD feature is assigned to the programmable key, it
can be controlled from the front panel.

TK-373G
5
OPERATING FEATURES
●List type system scan
A scan list can be set for each system.
The list to be scanned can be changed by changing the
display system
If many system have been set, the scan speed can be
increased by narrowing the systems to be scanned with scan
lists.
2) System lockout
The system lockout feature is used to lock systems out of
the scan sequence, and can be selected by programming in
the following two ways:
●Fixed lockout
The system to be locked out is selected by programming.
When a locked system is selected, the Delete ( ) indicator
appears on the left of the SYSTEM indicator. The revert system
is scanned even if it is locked out. If there is a locked system,
the Delete ( ) indicator flashes during fixed scanning.
●User selectable lockout
If the scan lockout feature is programmed to a key, the user
can lock systems out of the scan sequence with the key. To
lock a system out of the scan sequence, press the key when
the system is displayed. The Delete ( ) indicator is displayed
on the left of the SYSTEM indicator.
To unlock a system, select the system and press the key.
The Delete ( ) indicator disappears to indicate that the system
has returned to the scan sequence. The revert system is
scanned even if it is locked out. If there a locked system, the
Delete ( ) indicator flashes during fixed scanning. If all systems
are locked out, the scan stops and only the revert system is
received.
3) Drop-out delay time (Scan resume time)
If a call is received during scan, the scan stops. The scan
resume time can be programmed as 0 to 300 seconds in one-
second increments. The default value is 3 seconds.
4) Dwell time
The dwell time is the time after transmission ends until the
scan resumes in scan mode. It can be set 0 to 300 seconds by
programming. The default value is 3 seconds.
5) System/Group revert
System/Group revert can be programmed for one of the
following;
●Last called revert
The system/group changes to the revert system or group
when a call is received with the system/group being scanned.
●Last used revert
If a system/group call is received during scanning and the
PTT button is pressed for transmission and response within
the drop out delay time, the system/group is assigned as the
new revert system/group.
●Selected revert
If the system/group was changed while scanning, the newly
selected system/group.
●Selected + talkback
If the system/group was changed while scanning, the newly
selected system/group. The transceiver “talkback” on the
current receive group.
6) Scan message wait
The time for staying with the home repeater that receives a
signal during system scan and monitoring data messages can
be programmed. If there is no signal from the home repeater,
the system is scanned for about 50ms. If there is a signal,
three data messages are monitored. Normally, three data
messages are monitored for each system, and it can be
increased in multiples of three data messages per line to up to
eight lines.
If the repeater data message indicates that there is no call,
data monitoring is terminated and the home repeater of the
next system is scanned.
7) Group scan operation
Group scan can be programmed for each group. In addition
to the ID codes of the selected group, the ID codes of the
other groups that are permitted for group scan are decoded.
(The two fixed ID and block decode codes are always decoded.)
If, during group scanning, a call is received with one of the
selectable group ID codes for which group scan is enabled,
the group display indicates the group number that the call came
in with. That group then becomes the new selected group.
Group scan resumes after the specified dropout delay time or
dwell time shared by the system scan elapses.
8) In Conventional system.
If QT or DQT is set for the group, the groups, including
signalling, are scanned.
In case of the priority group is set in conventional system, if
a group scan (including group scan during a system scan)
temporarily stops (receiving) in a group that does not have
priority, a look back is performed to the priority group. Look
back is performed according to the look back time A and B
settings. If a call is received on the priority group, reception
immediately switches to the priority group.
4. Details of Features
1) Time-out timer
The time-out timer can be programmed in 15 seconds
increments from 15 seconds to 600. If the transmitter is keyed
continuously for longer than the programmed time, the
transmitter is disabled and a warning tone sounds while the

TK-373G
6
OPERATING FEATURES
PTT button is held down. The alert tone stops when the PTT
button is released.
2) PTT ID
PTT ID provides a DTMF ANI to be sent with the PTT button
every time it is used (Begin of TX ID at beginning of
transmission, End of TX ID at end of transmission, or both).
You can program the PTT ID as one of the followings.
Off, BOT (Begin of TX ID), EOT (End of PTT ID), BOTH.
You can program PTT ID “on” or “off” for each group.
The transceiver is capable of having ID. The format is DTMF.
The timing that the transceiver sends the ID is
programmable.
Begin of TX ID (BOT) :Begin of TX ID is sent at the
beginning of transmission.
End of TX ID (EOT) : End of TX ID is sent at the end of
transmission.
Both : Begin of TX ID is sent at the beginning of transmission
and End of TX ID is sent at the end of transmission.
There is also a "PTT ID" setting for each group.
3) Battery Warning
This transceiver has a battery warning feature. If low voltage
is detected during transmission, the transceiver warns you by
a flashing red "LED".
When the voltage is detected to be even lower during
transmission, the transceiver stops transmission and warns
you by a flashing red "LED" and a beep.
Please notice "indication" for the battery exchange, charging
time by flashing red LED and beep.
4) Radio password
When the password is set in the transceiver, user can not
use the transceiver unless enter the correct password.
This code can be up to 6 digits from 0 to 9 and input with
the keypad or selector, and “A” key.
5) Call indicator
The call indicator can be programmed for each group. In
trunked system, it can be set to respond to a selectable decode
ID or one of two fixed IDs, except block IDs. When a call is
received with a selectable decode ID, the call indicator flashes.
When a call is received with a fixed ID, the call indicator lights
continuously.
On a conventional system, the call indicator can be
programmed to light for each QT or DQT code. It keeps flashing
while a call is being received. It is turned off by pressing any
front panel key.
6) Free system ringback
This feature is available only when a telephone
interconnected ID code is selected. If a busy tone sounds when
the PTT button is pressed, the transceiver enters this mode
automatically.
When the PTT button is released, a beep sounds for 400ms
to indicate that the mode has been entered. If the scan is on, it
is resumed (the “SCN” mark goes on). When any repeater
becomes available, a ringing tone sounds and this mode ends.
The mode is terminated when the system, group, scan, PTT,
key is changed.
7) System search
This feature can be programmed to automatically access
other programmed systems when the selected system cannot
be accessed. If an intercept tone sounds when the PTT button
is pressed after setting the mode, the transceiver has entered
the mode.
If the group ID is a telephone interconnect ID, the transceiver
then attempts to access, in succession, other systems that
have a telephone interconnect ID in the revert group location.
If the group ID is a dispatch ID, the transceiver attempts to
access other systems that have a dispatch ID programmed in
the revert group location.
If there is no system to be accessed, an intercept tone
sounds, the mode is terminated, and the transceiver returns to
the first system. If the access is successful, the mode is
terminated, and the searched system becomes the new
selected system (If during scanning, the scan stops).
8) Transpond
This feature can be programmed to turn on and off for each
group. If the ID of the group for which transpond is enabled is
received, two data messages (transmit ID and turn-off code)
are automatically transmitted if the PTT button is not pressed
as a response within the time set (0 to 300 seconds in 1-second
increments). If the PTT button is pressed within the time, the
transpond is not preformed.
9) Transmit inhibit
The transceiver can be programmed with a transmit inhibit
block of ID codes. If an ID code within this block is decoded
the preset time before the PTT button is pressed, transmission
is inhibited. The BUSY indicator lights and a busy tone sounds
until the PTT button is released to indicate that transmission is
not possible (except clear-to talk mode).
Transmission with the group for which the encode ID is not
set is inhibited, and the busy tone is output while the PTT button
is held down, regardless of the clear-to -talk setting.
5. Audible user feedback tones
The transceiver outputs various combinations of tones to
notify the user of the transceiver operating state. The main
tones are listed below
The high tone is 1477Hz, the mid tone is 941Hz, and the
low tone is 770Hz.
• Power on tone
This tone is output when the transceiver is turned on. (The
high tone is output for 500ms.)

TK-373G
7
OPERATING FEATURES / REALIGNMENT
REALIGNMENT
1. Modes
User mode
Panel test mode
PC mode
Firmware
programming mode
Clone mode
Panel tuning mode
PC test mode
Data programming
mode
PC tuning mode
Checksum
3. For the panel Test Mode
For the setting method, refer to ADJUSTMENT.
3-1. For the panel Tuning Mode
For the setting method, refer to ADJUSTMENT.
• Alert tone
This tone is output when the transceiver is in TX inhibition
for TOT, battery warning and PLL unlocked. It is output until
the PTT button is released. (The 697Hz tone is output.)
• Busy Tone
In trunked mode the busy tone informs the user when the
repeater cannot be used (System busy or TX inhibit Status).
• Intercept tone
This tone indicates that the transceiver is out of range. It
indicates that the PTT button is pressed, and transmission has
started, but the repeater cannot be connected and talking is
not possible. It is output until the PTT button is released. (The
mid tone and low tone are output alternately in 200ms intervals.)
• Delay tone
This tone is output when the PTT button is pressed and the
repeater is accessed three times or more to indicate connection
with the repeater is delayed. This tone is the same as the busy
tone. (It is not output of CLEAT TO TALK has been set to
YES.)
• Proceed tone
This tone is output when the PTT button is pressed,
transmission starts, and the repeater is connected to indicate
that the user can talk if the Clear-to-talk function has been set.
(The high tone is output for 100ms.)
• Free system ringback mode tone, system search mode
tone
This tone indicates that the transceiver is free system
ringback mode or system search mode. (The low tone is output
for 400ms.)
• Ringing tone
This tone indicates that the transceiver can use the repeater
in free system ringback mode. (The mid tone and no tone are
output eight cycles alternately in 50ms intervals.)
Mode Function
User mode For normal use.
Panel test mode Used by the dealer to check the
fundamental characteristics.
Panel tuning mode Used by the dealer to tune the radio.
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 FPU.
See panel tuning.
Firmware program- Used when changing the main
ming mode program of the flash memory.
Clone mode Used to transfer programming data
from one radio to another.
2. How to Enter Each Mode
Mode Operation
User mode Power ON
Panel test mode [∞]+Power ON (Two seconds)
PC mode ReceivedcommandsfromPC
Panel tuning mode [Panel test mode]+[A]
Firmware programming mode [Side1]+[Side2]+Power ON
(Two seconds)
Clone mode [Side1]+[5]+Power ON
(Two seconds)

TK-373G
8
Notes:
• The data stored in the personal computer must match model
type when it is written into the flash memory.
• Change the TK-373G to PC mode, then attach the interface
cable.
5-3. KPG-22 description
(PC programming interface cable: Option)
The KPG-22 is required to interface the TK-373G to 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-
373G to the computers RS-232C serial port.
5-4. Programming software description
The KPG-76D programming disk is supplied in 3-1/2” disk
format. The software on this disk allows a user to program the TK-
373G radios via a programming interface cable (KPG-22).
5-5. Programming with IBM PC
If data is transferred to the transceiver from an IBM PC with
the KPG-76D, the destination data (basic radio information)
for each set can be modified. Normally, it is not necessary to
modify the destination data because their values are
determined automatically when the frequency range (frequency
type) is set.
The values should be modified only if necessary. Data can
be programmed into the flash memory in RS-232C format via
the universal connector.
REALIGNMENT
IBM-PC
KPG-76D
Gray SP
MIC
Gray/Black
1.5D-XV Lead wire
Gray-XV Shield wire
Tuning cable
(E30-3216-05)
KPG-22
RF Power meter
or SSG -
+
-
+
}
}
4. Checksum
Executing this function, “-PC-” appears on the display of
TK-373G while calculating the checksum .
When the calculation is completed, the display returns to
normal and PC displays the checksum of the radio.
5. PC Mode
5-1. Preface
The TK-373G transceiver is programmed using a personal
computer, a programming interface (KPG-22) and
programming software (KPG-76D).
The programming software can be used with an IBM PC or
compatible. Figure 1 shows the setup of an IBM PC for
programming.
5-2. Connection procedure
1. Connect the TK-373G 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 transmitted from transceiver, the red LED blink.
When data is received by the transceiver, the green LED blinks.
Fig. 1
6. Firmware Programming Mode
6-1. Preface
Flash memory is mounted on the TK-373G. This allows the
TK-373G to be upgraded when new features are released in
the future. (For details on how to obtain the firmware, contact
Customer Service.)
6-2. Connection procedure
Connect the TK-373G to the personal computer (IBM PC
or compatible) with the interface cable (KPG-22). (Connection
is the same as in the PC Mode.)
6-3. Programming
1. Start up the programming software (FPRO.EXE).
2. Set the communications speed (normally, 57600 bps) and
communications port in the Setup item.
3. Set the firmware to be updated by file name item.
4. Hold down the [Side1] and [Side2] switches on the TK-373G,
and press the power switch.
When the [Side1] and [Side2] switches are held down for
two seconds, "PROG 576" appears on the display and
the LED lights orange. When "PROG 576" is displayed,
release the switches.
5. Check the connection between the TK-373G and the
personal computer, and make sure that the TK-373G is in
Program mode.
6. Click “write” button in the window. A window opens on the
display to indicate the writing progress. When the TK-373G
begins to receive data, the LED lights green.
7. When data is received successfully, a checksum appears
on the display.

TK-373G
9
REALIGNMENT
8. If you want to continue programming other TK-373Gs,
repeat steps 4 to 7.
Notes:
●This mode cannot be entered if the Firmware Programming
mode is set to Disable in the Programming software (KPG-
76D).
●When programming the firmware, it is recommend to copy
the data from the floppy disk to your hard disk before you
update the radio firmware.
Directly copying from the floppy disk to the radio may not
work because the access speed is too slow.
6-4. Function
1. If you press the [Side2] switch while "PROG XXX" is
displayed, the checksum is displayed. If you press the
[Side2] switch again (while the checksum is displayed),
"PROG XXX" is redisplayed.
2. A transmission speed can be selected by pressing the [Side1]
switch while "PROG XXX" is displayed.
19200 bps: The LED flashes green and red alternately.
38400 bps: The LED flashes orange.
57600 bps: The LED lights orange.
Note:
Normally, write in the high-speed mode.
7. Clone Mode
Programming data can be transferred from one radio to
another by connecting them via their SP/MIC connectors. The
operation is as follows (the transmit radio is the master and
the receive radio is the slave).
1. Turn the master TK-373G power ON with the [Side1]+[5]
key held down. The TK-373G displays " CLONE ".
2. Power on the slave TK-373G.
3. Connect the cloning cable to the SP/MIC connectors on
the master and slave.
4. Press the [A] key on the master while the master displays
"CLONE ". The data of the master is sent to the slave.
Whiletheslaveisreceivingthe data, "-PC-" is displayed. When
cloning of data is completed, the master displays "END", and
the slave automatically operates in the User mode. The slave
can then be operated by the same program as the master.
5. The other slave can be continuously cloned. When the [A]
key on the master is pressed while the master displays
"END", the master displays " CLONE ". Carry out the
operation in steps 2 to 4.
Note: You can clone the programmed data between the
transceiver frequency version must be same.
Use the new clonig cable for TK-372G/373G.
You cannot use the old cloning cable for TK-360/370.
Cloning cable parts No.
E30-3410-05 (TK-373G → TK-373G)
φ3.5 φ2.5 φ3.5
φ2.5
GND
REMOTE/TXD
PTT/RXD
Cloning cable
Fig. 2

TK-373G
10
DISASSEMBLY FOR REPAIR
Separating the case assembly from the chassis.
1. Remove the two knobs zand three round units x.
2. Remove the two screws c.
3. Expand the right and left sides of the bottom of the case
assembly, lift the chassis, and remove it from the case
assembly v.
4. Taking cure not to cut the speaker lead b, open the chassis and
case assembly, and pull the speaker lead with connector n.
Separating the chassis from the unit.
1. Remove the three screws ..
Lift the unit (X54), and rise up the connecter lever in the
arrow with your finger /.
Remove the three hexagonal bosses Ω, and remove the
twelve screws m.
2. Remove the solder from the antenna terminal using a
soldering iron, then lift the unit off (X57).
v
c
c
xz
xz
x

CN3
b
n
Antenna teminal
X54-
X57-
X57-
❾❿
➐
❾
❾
➐
➐
➐➐➐➐
➐➐
➐
➐
➐

TK-373G
11
Fig. 3 Wide/Narrow changeover circuit
CIRCUIT DESCRIPTION
1. Frequency configuration
The receiver utilizes double conversion. The first IF is 49.95
MHz and the second IF is 450 kHz. The first local oscillator
signal is supplied form the PLL circuit.
The PLL circuit in the transmitter generates the necessary
frequencies. Fig. 1 shows the frequencies.
Fig. 1 Frequency configuration
1) Front end (RF AMP)
The signal coming form the antenna passes through the
transmit/receive switching diode circuit, (D3,D7) passes
through a BPF, and is amplified by the RF amplifier (Q301).
The resulting signal passes through a BPF and goes to the
mixer.
2) First mixer
The signal from the front end is mixed with the first local
oscillator signal generated in the PLL circuit by Q19 to
produce a first IF frequency of 49.95 MHz.
The resulting signal passes through the XF1 MCF to cut
the adjacent spurious and provide the optimum
characteristics, such as adjacent frequency selectivity.
Fig. 2 Receiver section
ANT
TX/RX : 450~470MHz (K)
TX/RX : 470~490MHz (K2)
ANT
SW RF
AMP
PA
AMP TX
AMP
MCF
49.95MHz 50.4MHz
CF
450kHz
IF
SYSTEM AF
AMP SP
RX : 400.05~420.05MHz (K)
RX : 420.05~440.05MHz (K2)
16.8MHz
PLL
VCO
X3
multiply TCXO
MIC
AMP MIC
TX/RX : 450~470MHz (K)
TX/RX : 470~490MHz (K2)
2. Receiver
The frequency configuration of the receiver is shown in Fig. 2.
IC4
IF, MIX, DET
AF AMP
IC16 (2/2)
X3 multiply
Q12 TCXO
5DE-
EMP MUTE
EXP
HPF LPF HPF BEF
IC14 21
41
SP
AF AMP
IC11
AF AMP
IC15(2/2) AF VOL
ANT
SW
BPF
RF
AMP
Q301
ANT
MIXER
Q19
1st Local
IF AMP
Q22
BPF MCF
XF1
CF1 : Wide
CF2 : Narrow
2nd Local
PLL
VCO
5R
Q14
Q17 D14
R78
R75
C263
C265
R80
D13
Q23
R98
R108
C133 CD1
R79
W/N "H" : Wide
"L" : Narrow
MXO IFI
MXI
IFO
AFO IC4
FM IF SYSTEM
Q22
5R
W/N
C107
R74
C108
CF1
CF2
R81 QAD
R105
3) IF Amplifier circuit
The first IF signal is passed through a four-pole monolithic
crystal filter (XF1) to remove the adjacent channel signal.
The filtered first IF signal is amplified by the first IF amplifier
(Q22) and then applied to the lF system IC (IC4). 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
IF signal with the 50.4MHz of the second local oscillator
output (TCXO X3) and produces the second IF signal of
450kHz.
The second IF signal is passed through the ceramic filter
(CF1; Wide, CF2 ; Narrow) 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 (CD1). The
demodulated signal is routed to the audio circuit.
4) Wide/Narrow changeover circuit
Narrow and Wide settings can be made for each channel
by switching the ceramic filters CF1 (Wide) and CF2
(Narrow).
The WIDE (high level) and NARROW (low level) data is
output from IC5 (OUTPUT EXPANDER), pin 4.
When a WIDE (high level) data is received, Q14 turn off
and Q17 turn on. When a NARROW (low level) data is
received, Q14 turn on and Q17 turn off. D14 and D13 are
switched to ceramic filters when a high/low level data is
received.
Q23 turns on/off with the Wide/Narrow data and the IC4
detector output level is changed to maintain a constant
output level during wide or narrow signals.

TK-373G
12
CIRCUIT DESCRIPTION
Fig. 4 AF Amplifier and Squelch
Fig. 5 PLL circuit
5) Audio amplifier circuit
The demodulated signal from IC4 is amplified by IC16 (2/2),
high-pass filtered, low-pass filtered, high-pass filtered, band-
eliminate filtered, and de-emphasized by IC14.
The signal then goes through an AF amplifier IC15 (2/2), an
AF volume control (VR2), and is routed to an audio power
amplifier(IC11)whereitisamplifiedandoutputtothe speaker.
6) Squelch
Part of the AF signal from the IC enters the FM IC (IC4)
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 (IC13). IC13 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, IC6 sends a high signal
to the SP MUTE line and turns IC11 on through
Q32,Q33,Q34 and Q30. (See Fig. 4)
7) Receive signaling
QT/DQT/LTR
300Hz and higher audio frequencies of the output signal from
IF IC are cut by a low-pass filter (IC19). The resulting signal
enters the microprocessor (IC13). IC13 determines whether
the QT, DQT or LTR matches the preset value, and controls
the SP MUTE and the speaker output sounds according to
the squelch results.
DET
IC13
IF AMP IC16 (2/2)
IF AMP
IC19
LPF
QT/DQT/LTR
93ANSQL
TOI 95
FM IF IC4
5
43
Q36
SW
Q32, 33, 34
SW
DE-
EMP MUTE
EXP
HPF LPF HPF BEF
IC14 21
IC15 (2/2)
AF AMP
41
IC11
AF PA AMP Q30 SW SP
OUTPUT EXPANDER
IC6
5RC
SP MUTE
5
7
CPU
PLL DATA
16.8MHz
REF OSC
1/M
1/N
PLL IC IC2
PHASE
COMPARATOR CHARGE
PUMP
LPF
10kHz/12.5kHz
D2, 4
D9, 11
Q37,38
Q2
TX VCO
Q10
RX VCO
Q3
BUFF AMP Q4
RF AMP
Q1
X2 multiply
Q7, 8
T/R SW
10kHz/12.5kHz
3. PLL frequency synthesizer
The PLL circuit generates the first local oscillator signal for
reception and the RF signal for transmission.
1) PLL
The VCO output is doubled by Q1 and then sent to the PLL
IC (IC2).
The frequency step of the PLL circuit is 10 or 12.5kHz.
A 16.8MHz reference an oscillator signal is divided at IC2
by a fixed counter to produce oscillator (VCO) output signal
which is buffer amplified by Q3 then divided in IC2 by a
dual-module programmable counter. The divided signal is
compared in phase with the 10 or 12.5kHz reference signal
from the phase comparator in IC2. 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 Q2 in transmit
mode and Q10 in receive mode. The oscillator frequency is
controlled by applying the VCO control voltage, obtained
from the phase comparator, to the varactor diodes (D2 and
D4 in transmit mode and D9 and D11 in receive mode).
The T/R pin is set high in receive mode causing Q7 and Q8
to turn Q2 off and turn Q10 on.
The T/R pin is set low in transmit mode. The outputs from
Q10 and Q2 are amplified by Q3 and sent to the buffer
amplifiers.
3) Unlock Detector
If a pulse signal appears at the LD pin of IC2, an unlock
condition occurs, and the DC voltage obtained form D1,
R1,andC6causesthevoltageappliedtothemicroprocessor
to go low. When the microprocessor detects this condition,
the transmitter is disabled, ignoring the push-to-talk switch
input signal.(See Fig. 6)
Fig. 6 Unlock detector circuit
IC2
LD
PLL IC
D1
C6
R1
5C
IC13
UL
MPU

TK-373G
13
6. Control Circuit
The control circuit consists of a microprocessor (IC13) and
its peripheral circuits. It controls the TX-RX unit and transfers
data to and from the display unit. IC13 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.
CIRCUIT DESCRIPTION
Fig. 8 Drive and final amplifier and APC circuit
From
T/R SW
(D5) DRIVE
AMP RF
POWER AMP LPF
ANT
SW
D3
ANT
VGG
Q6 IC1
VDD
R56
R57
R58
+B
IC3
(1/2) IC3 (2/2)
APC
(IC13)
Pre-DRIVE
AMP
Q5
3) APC circuit
The APC circuit always monitors the current flowing through
the RF power amplifier (IC1) and keeps a constant current.
The voltage drop at R56, R57 and R58 is caused by the
current flowing through the RF power amplifier and this
voltage is applied to the differential amplifier IC3(1/2).
IC3(2/2) compares the output voltage of IC3(1/2) with the
Fig. 7 Microphone amplifier
4. Transmitter System
1) Microphone amplifier
The signal from the microphone passes through the limiter
circuit in D23, and through the high-pass filter, the ALC
circuit, the low-pass filter, the high-pass filter, and pre-
emphasis/IDC circuit IC14. When encoding DTMF, the mute
switch (Q35) is turned OFF for muting the microphone input
signal.
The signal passes through the D/A converter (IC17) for the
maximum deviation adjustment, and goes to the VCXO
modulation input.
12 HPF LPF HPF IDC
PRE
EMP
ALC COMP
SW
LIMIT
D23
MIC IC14 15 16 18 19
Q35
MUTE
DTMF
98
6
D/A
IC13
CPU
IC17
QT/DQT/LTR
IC15
(2/2)
2
TOTCXO
20
TOVCO
22
VCO
AF
AMP
TCXO
(RX Audio)
LPF LPF
LPF
X1
DTMF
2) Drive and Final amplifier
The signal from the T/R switch (D5 is on) is amplified by the
pre-drive (Q5) and drive amplifier (Q6) to 50mW.
The output of the drive amplifier is amplified by the RF power
amplifier (IC1) 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 (D3 is on) and
applied to the antenna terminal.
reference voltage from IC13, and the output of IC3(2/2)
controls the VGG of the RF power amplifier to make both
voltages the same.
The change of power high/low is carried out by the change
of the reference voltage.
4) Encode signaling
(1) QT/DQT/LTR
QT,DQT,LTR data of the TOTCXO Line is output form pin
20 of the CPU. The signal passes through a low-pass CR
filter and goes to the TCXO(X1).
The QT,DQT,LTR data of the TOVCO Line is output form
pin 22 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. (See
fig.7)
(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
(IC14). The signal is mixed with the audio signal and goes
to the VCO.
TX deviation is adjusted by the CPU. (See fig.7)
5. Power supply
There are five 5V power supplies for the microprocessor:
5V,5M,5C,5R, and 5T. 5V 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.
5R is 5V for reception and output during reception.
5T is 5V for transmission and output during transmission.

TK-373G
14
●EEPROM
Note : The EEPROM stores tuning data (Deviation, Squelch,
etc.).
Realign the transceiver after replacing the EEPROM.
3) Low battery warning
The battery voltage is monitored by the microprocessor
(IC13). When the battery voltage falls below the voltage set
by the Low Battery Warning adjustment, the LED flashes
red to notify the operator that it is time to replace the battery.
If the battery voltage falls even more (approx. 5.8V), a beep
sounds and transmission is stopped.
CIRCUIT DESCRIPTION
Fig. 9 Memory circuit
IC13
IC12
CPU
IC10
EEPROM
FLASH
1) Frequency shift circuit
The microprocessor (IC13) operates at a clock of
9.8304MHz. This oscillator has a circuit that shifts the
frequency by BEAT SHIFT SW (Q31).
2) Memory circuit
Memory circuit consists of the CPU (IC13) and a flash
memory (IC12). A flash memory has a capacity of 2M bits
that contains the transceiver control program for the CPU
and data such as transceiver channels and operating
features.
This program can be easily written from an external device.
Data, such as DTMF memories and the operating status,
are programmed into the EEPROM (IC10).
●Flash Memory
Note : The flash memory holds data such as written with the
FPU (KPG-76D) and firmware program (User mode, Test
mode, Tuning mode, etc.). This data must be rewritten when
replacing the flash memory.
Fig. 10 Control system
8. CONTROL SYSTEM
Keys and channel selector circuit.
The signal from keys and channel selector input to
microprocessor directly as shown in fig. 10.
Channel selector
IC13
CPU
CN501
CN1
EN1
87
3
25
EN3
EN2
KOUT0 KOUT1 KOUT2 KOUT3 KIN0 KIN1 KIN2 KIN3 KIN4
16
27
KEYAD
PTT
MONI
SW
LAMP
SW
PTT
SW
5M
47k
47k
100k
AB
Low battery warning
The red LED flashes during
transmission.
The red LED flashes and a
continuous beep sounds
while PTT is pressed.
Battery condition
The battery voltage is low but
the transceiver is still usable.
The battery voltage is low and
the transceiver is not able to
make calls.

TK-373G
15
Microprocessor : 30622M4A-410GP
(TX-RX UNIT : IC13)
■Pin function
SEMICONDUCTOR DATA
LCD Driver : LC75823W (Display UNIT IC501)
■Block diagram
LATCH & DRIVER
SHIFT REGISTER
COMMON
DRIVER
ADDRESS
DETECTOR
CLOCK
GENERATOR
VDDCECLDI VSS
OSC
INH
VDD2
VDD1
COM1 COM2 COM3 S52 S51 S1
Pin No. Name I/O Active Function
1-52 S1-S52 O - Segment output for displaying data
transferred form serial data.
53-55 COM1-COM4 O-
Common drive output.
Frame frequency fo=(fosc/384)Hz
56 VDD - - The display to turn off
57 INH I L INT=L : Turn off
INT=H : Turn on
Apply 2/3 the LCD drive bias voltage
58 VDD1 I - form outside. If 1/2 the bias is applied,
connect to VDD2.
Apply 1/3 the LCD drive bias voltage
59 VDD2 I - form outside. If 1/2 the bias is applied,
connect to VDD1.
60 VSS - -
61 OSC I/O - Oscillation terminal
62 CE I H Chipenable.Serial data transferterminal.
Connected to the microprocessor.
63 CL I
Synchronizing clock. Serial data transfer terminal.
Connected to the microprocessor.
64 DI I - Trnsferdata.Serial data transferterminal.
Connected to the microprocessor.
■Pin function
1 APC O TX:Automatic Power Control data output
2 DTMF O DTMF BEEP output
3 2TN - Not used
4 DTMSTD I Not used
5 SIM I Destination select
6 BYTE I +5V(5M)
7 CNVSS I GND
8 AFSTB O Base Band IC strobe/rest output
9 AFFCLK O Base Band IC frame rest/system reset output
10 RESET I Reset
11 XOUT O Clock output
12 VSS - GND
13 XIN I Clock input
14 VCC - +5V
15 NC I NC
16 EN2 I Encoder pulse input 2
17 AUX3 I/O Not used
18 INT I Battery voltage monitor input Low battery:L
19 OE I Not used
20 TOTCXO I QT/DQT/LTR modulation output(TCXO)
21 EEPDAT I/O EEPROM data input/output
22 TOVCO O QT/DQT/LTR modulation output(VCO)
23 AUX1 I
24 SFTSTB O Shift register strobe output
25 EN1 O Encoder pulse input 1
26 DACS I Chip select output(Max dev) Select:L
27 EN3 I Not used
28 NC O NC
29 AUX4 O Not used
30 AUX2 I/O Not used
31 KOUT3 O Key scan output 3
32 KOUT2 O Key scan output 2
33 TXD O Serial data
34 PTT/RXD I PTT on: L/Serial data
35 KOUT1 O Key scan output 1
36 KOUT0 O Key scan output 0
37 RDY - Not used
38 ALE O Not used
39 HOLD I Not used
40 HLDA O Not used
41 BLCK O Not used
42 RDY O READ signal
43 BHE O Not used
44 WR O WRITE signal
45 LCDCS O LCD chip enable output
46 CNTDAT OCommon data output
(EEPROM,LCD,SHIFTREG,1bitD/AMODEM)
47 CNTCLK OCommon clock output
(EEPROM,LCD,SHIFTREG,1bitD/AMODEM)
48 CSO - Chip select signal
Pin Port I/O Function
No. Name

TK-373G
16
SEMICONDUCTOR DATA / DESCRIPTION OF COMPONENTS
Pin Port I/O Function
No. Name
49 A19 - Not used
50-59 A18-A9 - Flash memory address bus
60 VCC - +5V
61 A8 - Flash memory address bus
62 VSS - GND
63-70 A7-A0 - Flash memory address bus
71-75 KIN0-KIN4 I Key scan input
76 PLLUL O PLL unlock detect input unlock: L
77 PLLSTB O PLL strobe output Latch: L
78 SAVE I Not used
79-86 D7-D0 - Flash memory data bus
87 KEYAD I MONI LAMP key input
88 BATT I Battery voltage input
89 RFDAT O PLL data output
90 RFCLK O PLL clock output
91 NC - NC
92 RSSQL I Receive signal strength indicator input
93 ANLSQL I Analog squelch level input
94 AVSS - GND
95 TOI I QT/DQT/LTR signal input
96 VREF - Reference voltage input
97 AVCC - GND
98 DTMPD O Not used
99 DTMCLK O Not used
100 DTMDAT I Not used
Pin Port I/O Function
No.
Shift register 2:BU4094BCFV(IC6)
■Pin function
4 5MC O 5MC control Power on: L
5 5RC O 5R control Power on: L
6 5TC O 5T control Power on: H
7 SPMUTE O AF amp power supply control Power on: H
11 AUX6 O Option board port 6 Auxiliary Output
12 AUX5 O Option board port 5 Link complete
13 LCDBLK O LCD back light Back light on: L
14 RX O RX/TX VCO SW RX: L
4 W/N O Wide/Narrow SW Narrow: L
5 MUTE O RX audio/MIC mute Mute: L
6NC O NC
7 LED0 O RED LED LED lights: H
11 BSHIFT O Beat Shift Shift on: H
12 REG2 O Base Band IC inter register select 2
13 REG1 O Base Band IC inter register select 1
14 LED1 O GREEN LED LED lights: H
Pin Port I/O Function
No.
Shift register 1:BU4094BCFV(IC5)
■Pin function
DESCRIPTION OF COMPONENTS
DISPLAY UNIT (X54-3250-11)
IC501 IC LCD driver
Q501 Transistor Current driver /LCD backlight LEDAVR
Q502 Transistor DC switch
D505 Diode Speed up
D506 LED LCD back light
D507 Diode Voltage reference
D511 LED LCD back light
D515,516 LED LED /Key pad back light
Ref. No. Use/Function Operation/Condition
IC1 IC RF Power Module
IC2 IC PLL system
IC3 IC Comparator (APC)
IC4 IC FM IF system
IC5,6 IC Shift register / Output expander
IC7 IC Voltage regulator/ 5V
IC8 IC Voltage detector / Reset
IC9 IC Voltage detector / INT
IC10 IC EEPROM
IC11 IC AF Power amplifier
IC12 IC Flash memory
IC13 IC Microprocessor
IC14 IC Audio processor
IC15(1/2) IC -
IC15(2/2) IC AF Pre amplifier
IC16(1/2) IC Bias buffer
IC16(2/2) IC AF Buffer amplifier
IC17 IC D/A converter (TX AF adjustment)
IC19 IC Active filter / For LSD in
Q1 Transistor PLL IC fin amplifier
Q2 Transistor VCO oscillation (TX)
Q3 Transistor RF Buffer amplifier
Q4,5 Transistor RF amplifier
Q6 Transistor RF amplifier / TX driver
Q7 FET DC switch
Q8,Q9 Transistor DC switch
Q10 FET VCO oscillation (RX)
Q11 Transistor Ripple filter
Q12 Transistor Tripler
Q13 Transistor DC switch
Q14 Transistor 2nd IF W/N switch sets to on when Narrow
Q15 Transistor DC switch
Q16 Transistor DC switch / 5R
Q17 Transistor 2nd IF W/N switch sets to on when Wide
Q18 Transistor DC switch / 5T, Save
Q19 FET Mixer
Q20,Q21 Transistor DC switch / 5T, Save
Q22 Transistor IF amplifier
Q23 Transistor DC switch / W/N audio amplitude adjust
Q24 Transistor DC switch / LED (Red)
Q25 Transistor DC switch / LED (Green)
Ref. No. Use/Function Operation/Condition
TX-RX UNIT (X57-650X-XX)

TK-373G
17
Q26 Transistor DC switch / Squelch
Q27 FET DC switch / 5T, Save
Q28 Transistor DC switch / 5M
Q30 FET SP Mute switch
Q31 Transistor Clock frequency shift
Q32~34 Transistor DC switch / SP Mute
Q35(1/2) FET Mute switch / MIC line mute
Q35(2/2) FET DC switch
Q36 FET Mute switch
Q37,38 Transistor PLL charge pump
Q39 FET Mute switch/DET line Mute
Q301 FET RF amplifier
D1 Diode Unlock detect
D2
Variable
Frequency control
capacitance diode
D3 Diode ANT switch
D4
Variable
Frequency control
capacitance diode
D5 Diode TX/RX switch
D6
Variable
TX modulation
capacitance diode
D7 Diode ANT switch
D8 Zener Diode Overload protection
D9
Variable
Frequency control
capacitance diode
D10 Diode TX/RX Switch
D11
Variable
Frequency control
capacitance diode
D12 Diode Current steering
D13,14 Diode RF switch (2nd IF wide/narrow)
D15 Diode Reverse protection
D17 Diode Model check
D18 LED LED/ Red, Green
D21 Diode Reverse protection
D22 Diode Reverse protection
D23 Diode Voltage clamp
D27 Diode Discharge speed up
D28 Diode Voltage pull up
D29 Diode Gain control
Ref. No. Use/Function Operation/Condition
DESCRIPTION OF COMPONENTS

18
K : TK-373G K
K2 : TK-373G K2
TK-373G PARTS LIST
Parts No. Description Address New
parts
Destination Destination
TK-373G
Ref. No. Parts No. Description
Address New
parts
∗New Parts. indicates safety critical components.
Parts without Parts No. are not supplied.
Les articles non mentionnes dans le Parts No. ne sont pas fournis.
Teile ohne Parts No. werden nicht geliefert.
TK-373G
L: Scandinavia K: USA P: Canada
Y: PX (Far East, Hawaii) T: England E: Europe
Y: AAFES (Europe) X: Australia M: Other Areas
Ref. No.
B 2A N09-2331-05 SPECIAL SCREW(BATT TERMINAL+)
C 1B N14-0582-14 CIRCULAR NUT(SMA)
D 1B N14-0583-04 CIRCULAR NUT(VOL/ENC)
E 3A N30-2606-46 PAN HEAD MACHINE SCREW
F 2A N39-2030-46 PAN HEAD MACHINE SCREW
G 2B N67-2005-46
PAN HEAD SEMS SCREW(POWER MODULE)
H 1B,3A,3B N78-2045-46 PAN HEAD TAPTITE SCREW
I 3A N79-2030-46 PAN HEAD TAPTITE SCREW
J 2A,2B N83-2005-46 PAN HEAD TAPTITE SCREW
K 2C N99-2012-05 SCREW SET
VR2 - R31-0628-15 VARIABLE RESISTOR
SP 1B T07-0326-05 SPEAKER
S1 - W02-1969-15 ENCODER
D506 B30-2210-05 LED(TLY)
D511 B30-2210-05 LED(TLY)
D515,516 B30-2171-05 LED(D)
C501-509 CC73GCH1H221J CHIP C 220PF J
C513 CK73GB1H102K CHIP C 1000PF K
C515,516 CC73GCH1H101J CHIP C 100PF J
CN501 E40-6012-05 FLAT CABLE CONNECTOR
L501,502 L92-0138-05 FERRITE CHIP
CP501 R90-0748-05 MULTI-COMP 47K X4
CP502,503 R90-0724-05 MULTI-COMP 1K X4
R501-510 RK73GB1J102J CHIP R 1.0K J 1/16W
R511 R92-1252-05 CHIP R 0OHM J 1/16W
R512 RK73GB1J102J CHIP R 1.0K J 1/16W
R513-515 RK73GB1J103J CHIP R 10K J 1/16W
R516 RK73GB1J473J CHIP R 47K J 1/16W
R517 RK73GB1J103J CHIP R 10K J 1/16W
R518 RK73GB1J471J CHIP R 470 J 1/16W
R522 RK73GB1J102J CHIP R 1.0K J 1/16W
R523 RK73GB1J473J CHIP R 47K J 1/16W
R524 RK73GB1J471J CHIP R 470 J 1/16W
D501-504 MA2S111 DIODE
D505 1SS373 DIODE
D507 MA2S111 DIODE
IC501 LC75823W MOS IC
Q501 2SB1132(Q,R) TRANSISTOR
Q502 2SC4617(S) TRANSISTOR
D18 B30-2019-05 LED(RE/GR)
C1 CC73HCH1H100C CHIP C 10PF C
C3-5 CC73GCH1H010B CHIP C 1.0PF B K2
C4,5 CC73GCH1H010B CHIP C 1.0PF B K
C6 CK73HB1A104K CHIP C 0.10UF K
C8 CC73GCH1H030B CHIP C 3.0PF B
1 1A A02-3568-33 CABINET ASSY
2 3B A82-0036-02 REAR PANEL
3 2C B09-0351-03 CAP(SP/MIC)
4 2B B11-1220-03 ILLUMINATION GUIDE
52B∗B38-0867-05 LCD
62D∗B62-1576-00 INSTRUCTION MANUAL
72D∗B72-2026-04 MODEL NAME PLATE K
72D∗B72-2027-04 MODEL NAME PLATE K2
8 3B E04-0413-05 RF COAXIAL RECEPTACLE(SMA)
9 3A E23-1183-04 RELAY TERMINAL(BATT-)
10 2A E23-1184-04 RELAY TERMINAL(BATT+)
11 2B E29-1177-04 INTER CONNECTOR(LCD)
12 2A E37-0805-05 FLAT CABLE(TX/RX-DISP)
13 1B E37-0829-05 SPEAKER CORD
14 3A E37-0830-05 FLAT CABLE(PTT)
15 2B F10-2302-04 SHIELDING COVER(POWER MODULE)
16 2A F10-2304-03 SHIELDING COVER(TX/RX UNIT)
17 2A F20-3307-04 INSULATING SHEET(LCD)
18 2A F20-3308-04 INSULATING SHEET(DISP/CHASSIS)
19 1A G01-0881-04 COIL SPRING(BATT RELEASE)
20 1B G10-1232-04 FIBROUS SHEET(SPEAKER)
21 3B G13-1744-14 CUSHION(CHASSIS-BATT)
22 2B G13-1783-04 CUSHION(POWER MODULE COVER)
- G13-1834-04 CUSHION(BATT TERMINAL + -)
23 1B G53-0882-03 PACKING(SPEAKER/ECM)
24 3A G53-0883-04 PACKING(BATT TERMINAL+)
25 1A G53-0891-04 PACKING(PTT KNOB)
26 3B G53-1530-02 PACKING
27 2B G53-1531-03 PACKING(SP/MICJACK)
28 1C,2C H12-1487-02 PACKING FIXTURE
29 1C H25-0085-04 PROTECTION BAG
30 2C H25-2012-04 PROTECTION BAG
31 3D ∗H52-1859-12 ITEM CARTON CASE
32 1A J19-1572-04 HOLDER(BATT RELEASE)
33 2B J19-5352-03 HOLDER(VOL/ENC)
34 2A J19-5353-14 HOLDER(BATT TERMINAL+)
35 2C J21-4493-04 SP/MIC HOLDER
36 2B J21-8377-03 HARDWARE FIXTURE(LCD)
37 1B J21-8378-04 HARDWARE FIXTURE(SPEAKER)
38 2C J29-0658-05 BELT HOOK
39 2A J32-0925-04 HEXAGON BOSS
40 1B K29-5331-03 KNOB(ENCODER)
41 1B K29-5332-03 KNOB(VOLUME)
42 1A K29-5333-13 BUTTON KNOB(MONI/LAMP)
43 1A K29-5334-13 BUTTON KNOB(PTT)
44 1A K29-5337-03 LEVER KNOB(BATTRELEASE)
45 1A ∗K29-9142-02 KEY TOP(4 KEYS)
A 3B N09-2319-05 BINDING HEAD SCREW(SMA)
DISPLAY UNIT (X54-3250-11)
TX-RX UNIT (X57-6500-XX) -10:TK-373G K -11:TK-373G K2

K : TK-373G K
K2 : TK-373G K2
TK-373G
PARTS LIST
19
Ref. No. Parts No. Description
Address New
parts
Ref. No. Parts No. Description
Address New
parts Destination Destination
TX-RX UNIT (X57-6500-XX)
C9 CK73HB1H471K CHIP C 470PF K
C10 CC73GCH1H060B CHIP C 6.0PF B K2
C10 CC73GCH1H080B CHIP C 8.0PF B K
C11 CC73GCH1H080D CHIP C 8.0PF D
C12 CC73GCH1H070D CHIP C 7.0PF D
C13 CK73GB1H471K CHIP C 470PF K
C14 CC73GCH1H0R5B CHIP C 0.5PF B
C15 CC73GCH1H101J CHIP C 100PF J
C16 CC73GCH1H050B CHIP C 5.0PF B K2
C16 CC73GCH1H060B CHIP C 6.0PF B K
C17 CC73GCH1H040B CHIP C 4.0PF B K
C17,18 CC73GCH1H040B CHIP C 4.0PF B K2
C18 CC73GCH1H060B CHIP C 6.0PF B K
C20 CC73GCH1H020B CHIP C 2.0PF B K2
C20 CC73GCH1H030B CHIP C 3.0PF B K
C22 CC73GCH1H101J CHIP C 100PF J
C23 CC73GCH1H020B CHIP C 2.0PF B K
C23 CC73GCH1H050B CHIP C 5.0PF B K2
C24 CC73GCH1H030B CHIP C 3.0PF B K
C24 CC73GCH1H080B CHIP C 8.0PF B K2
C25 CC73GCH1H040B CHIP C 4.0PF B K
C25 CC73GCH1H090B CHIP C 9.0PF B K2
C26 CC73GCH1H1R5B CHIP C 1.5PF B
C27 CC73GCH1H0R5B CHIP C 0.5PF B
C28 CC73GCH1H060D CHIP C 6.0PF D
C29 CC73GCH1H030B CHIP C 3.0PF B
C30 CC73GCH1H060D CHIP C 6.0PF D
C31 C92-0662-05 CHIP-TAN 15UF 6.3WV
C32 CK73HB1A104K CHIP C 0.10UF K
C33 CC73GCH1H050B CHIP C 5.0PF B K2
C33 CC73GCH1H060B CHIP C 6.0PF B K
C35-41 CK73GB1H471K CHIP C 470PF K
C42,43 CC73GCH1H101J CHIP C 100PF J
C44 CC73HCH1H101J CHIP C 100PF J
C45 CK73GB1H471K CHIP C 470PF K
C48,49 C92-0001-05 CHIP-C 0.1UF 35WV
C51 C92-0697-05 CHIP-TAN 3.3UF 16WV
C52 CC73GCH1H030B CHIP C 3.0PF B K2
C52 CC73GCH1H040B CHIP C 4.0PF B K
C53 CK73GB1H471K CHIP C 470PF K
C54 CK73FB1C474K CHIP C 0.47UF K
C55 CK73GB1H471K CHIP C 470PF K
C57 CK73FB1C474K CHIP C 0.47UF K
C58 CK73GB1H103K CHIP C 0.010UF K
C60 CK73GB1H103K CHIP C 0.010UF K
C62 CC73GCH1H270J CHIP C 27PF J K2
C62 CC73GCH1H560J CHIP C 56PF J K
C63 CC73GCH1H070B CHIP C 7.0PF B
C64 CC73GCH1H010B CHIP C 1.0PF B
C68 C92-0565-05 CHIP-TAN 6.8UF 10WV
C70 CK73GB1H103K CHIP C 0.010UF K
C71 CC73GCH1H101J CHIP C 100PF J
C72 CC73GCH1H180G CHIP C 18PF G K2
C72 CC73GCH1H330G CHIP C 33PF G K
C73 CK73GB1H471K CHIP C 470PF K
C74 CK73FB1E104K CHIP C 0.10UF K
C75 CK73GB1H471K CHIP C 470PF K
C76 CK73GB1H102K CHIP C 1000PF K
C78 CC73GCH1H470J CHIP C 47PF J
C81 CC73GCH1H010C CHIP C 1.0PF C
C82 CK73GB1H102K CHIP C 1000PF K K
C84,85 CK73GB1H471K CHIP C 470PF K
C86,87 CC73HCH1H100C CHIP C 10PF C
C88 CC73GCH1H040B CHIP C 4.0PF B K
C88 CC73GCH1H050B CHIP C 5.0PF B K2
C89 CC73GCH1H070B CHIP C 7.0PF B
C90 C92-0560-05 CHIP-TAN 10UF 6.3WV
C94 C92-0560-05 CHIP-TAN 10UF 6.3WV
C95,96 CK73GB1H471K CHIP C 470PF K
C98 C92-0560-05 CHIP-TAN 10UF 6.3WV
C99 CK73GB1C104K CHIP C 0.10UF K
C100 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C101 CK73GB1H471K CHIP C 470PF K
C104 CK73GB1H471K CHIP C 470PF K
C107,108 CK73GB1C104K CHIP C 0.10UF K
C109 C92-0662-05 CHIP-TAN 15UF 6.3WV
C110 CK73GB1H103K CHIP C 0.010UF K
C111 CK73GB1H471K CHIP C 470PF K
C112 CC73GCH1H050B CHIP C 5.0PF B
C113 CK73GB1H471K CHIP C 470PF K
C114 CK73GB1H391K CHIP C 390PF K
C115 CK73GB1C104K CHIP C 0.10UF K
C118 CK73GB1H471K CHIP C 470PF K
C119 CK73FB1A105K CHIP C 1.0UF K
C120,121 CK73GB1H471K CHIP C 470PF K
C122 CK73FB1A105K CHIP C 1.0UF K
C123 CK73GB1H391K CHIP C 390PF K
C124 CC73GCH1H390J CHIP C 39PF J K
C124 CC73GCH1H560J CHIP C 56PF J K2
C125,126 CK73GB1H103K CHIP C 0.010UF K
C127 CC73GCH1H010B CHIP C 1.0PF B
C128 CC73GCH1H120J CHIP C 12PF J
C130 CK73GB1H471K CHIP C 470PF K
C131 CC73GCH1H100D CHIP C 10PF D
C132 CK73GB1H103K CHIP C 0.010UF K
C133 CC73GCH1H820J CHIP C 82PF J
C134 CK73GB1H471K CHIP C 470PF K
C135 CK73GB1C104K CHIP C 0.10UF K
C136 CC73GCH1H040B CHIP C 4.0PF B
C137 CK73GB1H471K CHIP C 470PF K
C138 CK73GB1C104K CHIP C 0.10UF K
C139 CC73GCH1H181J CHIP C 180PF J
C140 CK73GB1H103K CHIP C 0.010UF K
C141 CK73GB1C104K CHIP C 0.10UF K
C142 CK73FB1A105K CHIP C 1.0UF K
C143,144 CK73GB1H471K CHIP C 470PF K
C146,147 CK73GB1C104K CHIP C 0.10UF K
C148 CK73GB1H103K CHIP C 0.010UF K
C150 CK73GB1H102K CHIP C 1000PF K
C151-153 CK73GB1H471K CHIP C 470PF K
C155 C92-0662-05 CHIP-TAN 15UF 6.3WV
C156,157 CK73GB1H471K CHIP C 470PF K

TK-373G PARTS LIST
20
Ref. No. Parts No. Description
Address New
parts
Ref. No. Parts No. Description
Address New
parts Destination Destination
TX-RX UNIT (X57-6500-XX)
K : TK-373G K
K2 : TK-373G K2
TX-RX UNIT (X57-588X-XX)
C158 CK73FB1A105K CHIP C 1.0UF K
C159 CK73GB1H471K CHIP C 470PF K
C161 CK73GB1H471K CHIP C 470PF K
C162 CK73GB1H103K CHIP C 0.010UF K
C163,164 CK73GB1H471K CHIP C 470PF K
C165 CK73GB1H103K CHIP C 0.010UF K
C166 CK73FF1E104Z CHIP C 0.10UF Z
C167 CK73GB1H471K CHIP C 470PF K
C170,171 CK73GB1H471K CHIP C 470PF K
C173 C92-0567-05 CHIP-TAN 68UF 6.3WV
C174 CK73GB1H471K CHIP C 470PF K
C176 CC73GCH1H101J CHIP C 100PF J
C177 CK73GB1C473K CHIP C 0.047UF K
C178 C92-0560-05 CHIP-TAN 10UF 6.3WV
C179 CK73GB1C104K CHIP C 0.10UF K
C180 CK73GB1H103K CHIP C 0.010UF K
C181 CK73GB1C393K CHIP C 0.039UF K
C182 CK73GB1H102K CHIP C 1000PF K
C183,184 CK73GB1C104K CHIP C 0.10UF K
C185 CC73GCH1H180J CHIP C 18PF J
C186,187 CK73GB1C104K CHIP C 0.10UF K
C189 CK73GB1H103K CHIP C 0.010UF K
C190,191 CK73GB1C104K CHIP C 0.10UF K
C192,193 CC73GCH1H300J CHIP C 30PF J
C194 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C196 CC73GCH1H101J CHIP C 100PF J
C198,199 CK73GB1H103K CHIP C 0.010UF K
C200 CK73GB1A224K CHIP C 0.22UF K
C201 CK73GB1H103K CHIP C 0.010UF K
C202,203 CK73GB1C104K CHIP C 0.10UF K
C204 CK73FB1C474K CHIP C 0.47UF K
C205 CK73GB1H103K CHIP C 0.010UF K
C206-208 CK73GB1C104K CHIP C 0.10UF K
C209 CK73GB1H332K CHIP C 3300PF K
C210 CK73GB1H102K CHIP C 1000PF K
C211 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C212 CK73GB1H122K CHIP C 1200PF K
C213 CK73GB1H103K CHIP C 0.010UF K
C215 CK73GB1C104K CHIP C 0.10UF K
C216 CK73GB1H332K CHIP C 3300PF K
C217 CK73GB1E153K CHIP C 0.015UF K
C218 CK73FB1H563K CHIP C 0.056UF K
C219 CK73GB1C104K CHIP C 0.10UF K
C221 CK73GB1H471K CHIP C 470PF K
C222 CK73GB1H103K CHIP C 0.010UF K
C223 C92-0560-05 CHIP-TAN 10UF 6.3WV
C224 CK73GB1H122K CHIP C 1200PF K
C225 CC73GCH1H101J CHIP C 100PF J
C226,227 CK73GB1H562J CHIP C 5600PF J
C229 CK73FB1H471K CHIP C 470PF K
C230 CK73GB1H562J CHIP C 5600PF J
C231 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C232 CK73GB1H103K CHIP C 0.010UF K
C233 CC73GCH1H151J CHIP C 150PF J
C234,235 CK73GB1H272J CHIP C 2700PF J
C236 CK73GB1C104K CHIP C 0.10UF K
C238 CK73GB1H392K CHIP C 3900PF K
C239 CK73GB1C104K CHIP C 0.10UF K
C240 CK73GB1H272J CHIP C 2700PF J
C241 CK73GB1H471K CHIP C 470PF K
C242 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C243 CK73FB1A105K CHIP C 1.0UF K
C244 C92-0560-05 CHIP-TAN 10UF 6.3WV
C245 CK73GB1H471K CHIP C 470PF K
C246 CK73FB1A105K CHIP C 1.0UF K
C247 CK73GB1E123K CHIP C 0.012UF K
C249 CK73GB1H222K CHIP C 2200PF K
C250 CK73GB1C683K CHIP C 0.068UF K
C253,254 CK73GB1H103K CHIP C 0.010UF K
C255 CK73GB1H183K CHIP C 0.018UF K
C257,258 CK73GB1E153K CHIP C 0.015UF K
C259 CC73GCH1H121J CHIP C 120PF J
C260 CK73GB1H183K CHIP C 0.018UF K
C261 CK73GB1E153K CHIP C 0.015UF K
C262 CK73GB1H102K CHIP C 1000PF K
C263 CK73GB1C104K CHIP C 0.10UF K
C265,266 CK73GB1C104K CHIP C 0.10UF K
C268 CK73GB1H102K CHIP C 1000PF K
C271 CK73GB1H102K CHIP C 1000PF K
C272 CK73HB1H471K CHIP C 470PF K
C273-276 CK73GB1H471K CHIP C 470PF K
C277 CC73GCH1H680J CHIP C 68PF J
C278 CK73GB1C104K CHIP C 0.10UF K
C302 CC73GCH1H010B CHIP C 1.0PF B
C303 CC73GCH1H030B CHIP C 3.0PF B
C304 CK73GB1H471K CHIP C 470PF K
C305,306 CC73GCH1H0R5B CHIP C 0.5PF B
C307 CC73GCH1H220J CHIP C 22PF J
C309 CC73GCH1H100D CHIP C 10PF D K2
C309 CK73GB1H471K CHIP C 470PF K K
C311 CC73GCH1H020B CHIP C 2.0PF B K2
C311 CC73GCH1H030B CHIP C 3.0PF B K
C312 CC73GCH1H010B CHIP C 1.0PF B K2
C312 CC73GCH1H020B CHIP C 2.0PF B K
C314 CC73GCH1H020B CHIP C 2.0PF B K2
C314 CC73GCH1H030B CHIP C 3.0PF B K
C316,317 CK73GB1H471K CHIP C 470PF K
C325-327 CK73GB1H471K CHIP C 470PF K
C333 CC73GCH1H330J CHIP C 33PF J K2
C333 CC73GCH1H390J CHIP C 39PF J K
C334 CC73HCH1H040B CHIP C 4.0PF B
C335 CC73GCH1H050B CHIP C 5.0PF B K2
C336 CK73FB1A105K CHIP C 1.0UF K
TC1,2 C05-0384-05 CERAMIC TRIMMER CAP(10PF)
TC301,302 C05-0383-05 CERAMIC TRIMMER CAP(6PF)
TC303 C05-0384-05 CERAMIC TRIMMER CAP(10PF)
CN1 E40-6012-05 FLAT CABLE CONNECTOR
CN3 E40-5662-05 PIN ASSY SOCKET
J1 E11-0457-05 PHONE JACK
F1 F53-0130-05 FUSE
F1 F53-0217-05 FUSE