TK-250 - K9ROD

VHF FM TRANSCEIVER
KENWOOD
TK-250
SERVICE MANUAL
I
REVISED
© 1995-4 PRINTED IN JAPAN
I
B51-8279-20 (B) 1558
This service manual is the same as the service manual
(851-8279-10) for TK-250 (K , K2, Mand M2 destinations ) except th at th is manual contains new items (T, E
destinations).
Use it together with the previous service manual (8518279-10).
CONTENTS
Antenna
(T90- *)
GEN ERAL •.......•.•.•.••..•............•.•••..•.•........•••..•.••.•...•....
2
DISASSEMBL
Y FOR REPAIR •.•.•..•.•..........•..•.••.•.......
3
INST ALLA TION .•........•.•.•.•.••.•....•.....•.•.••.•.•••.•......•.•.••.
5
REALIGNMENT
8
CIRCUIT
.••..•.•.•.......•.•.••••..•.•..•.•..•...•.•.•.•.••.......
DESCRIPTION
SEMICONDUCTOR
DESCRIPTION
•.•••...•.•...••..•••.•.•.....•.••.•.•..••..
DATA .....•.•.•..•.•.•.•..........••.•.•.•....
OF COMPONENTS
•..•.•.•......•...••.•.•.•.
16
24
31
Knob(CHANNEL SELECTOR)
PARTS LIST ..•.•..••.••.•.........•.•.••..•..•.........•.•..•.•..•........•
33
(K29-4920-03)
EXPLODED
ViEW •..•.•.••.............•..•.•.•.............•.•.••..•...
40
...•.•............••••.•...•.......•..•....••..•.•...........•.•.•.•
42
PACKING
TERMINAL
FUNCTION
ADJUSTMENT
•.••.•.•............•.•.•..•.•...........•.••.
43
...•.•........•.•.••...•.•..........•.••••.•.•.•.•......•.••
46
PC BOARD VIEWS
Knob(VOLUME)
(K29-4918-03)
VCO UNIT(X58-4130-10)
•..•.•........••••••••.•.•.•.••..•.•••.
51
VCO UNIT(X58-4290-50)
.....•.•.•..•.•.••.•.•.......••.•.•.•..
52
(A/3) ........•.•.•.•.•.•.......
53
TX-RX UNIT(X57-444X-XX)
Badge
(B43-11oo-04)
Knob(PTl)
(K29-4917 -02) --
TX-RX UNIT(X57-444X-XX)
(B/3) ...•.••••.•.•.•.•........•
57
TX-RX UNIT(X57-4442-71)
(A/3) •.•.•.•.•••.•.•.......•.••.
61
TX-RX UNIT(X57-4442-71)
(B/3) •.•.........•.•.•.•.•.•..•.
65
TX-RX UNIT(X57-444X-XX)
(C/3) ..........•.•.•.•........•
69
SCHEMATIC
Dressing panel
(A21 -1544-03)
DIAGRAM
.....•.••.•.•.•.•.••.........•••.•.•.••••..•.
73
BLOCK DIAGRAM
.........•..•.•.•.•.••.•..........•.•.•.•..••.•.......
81
LEVEL DIAGRAM
......•..••.••.•..•.•••........•..•.•.•.•.•.........•••
83
KEY PAD) •.•.•.•.•...........••••.••.•.••..•......•.
84
Cabinet
--
(A02-1829-01)
KDM-7(DTMF
KHS-1
(HEAD SET WITH VOX & PTT) •.•.•.••••..•......•••
KSC-76 (MULTIPLE
KSC-8 (COMPACT
KSC-86
(MULTIPLE
KNB-11 A/12A(Ni-Cd
KPG-22(PC
RAPID CHARGER)
CHARGER)
CHARGER)
86
•••.•.•.•.........••.••••..•.••.•
89
•..•........•..•...•.•.•..•.•..
90
BA TTERY) •..••....•......•.•••..•••.•.•.
93
PROGRAM
SPECIFICATIONS
84
•.•..•.•........••.
INTERFACE)
..•.•.•.•.•.•.•.•.•............
•..•.•.•.••••.•......••
93
BACK COVER
*Refer to parts list on page 33.
CAUTION :
When using an extemal power connector, please use with maximum final module
protection of 9V.
TK-250
GENERAL
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 af ter publication are covered by either Service
Bulletins or Manual Revisions. These are issued as
required.
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.
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.
0
OP
136-150MHz
45.05MHz
45.505MHz
150-174MHz
OT/DOT
Remarks
OP
Charger
Battery
Frequency
LOCrange
Version
SERVICE
This radio is designed for easy servicing. Refer to
the schematic diagrams, printed circuit board views,
and alignment procedures contained within.
NOTE
WE CANNOT guarantee oscillator
uSlng channel element manufactured
KENWOOD or its authorized agents.
IF1
IF1
Frequency table tor using user mode at time ot shipment
-
TX
~
2
DEL
162.600MHz
162.500MHz
162.650MHz
162.550MHz
141.3Hz
ADD
023N
ADD
162.2Hz
DEL
151.4Hz
143.550MHz
143.600MHz
143.500MHz
143.650MHz
162.000MHz
143.000MHz
150.000MHz
136.000MHz
173.975MHz
149.975MHz
143.100MHz
150.100MHz
136.100MHz
173.900MHz
149.900MHz
SCAN
(TYPE 1)
K2,M2
(TYPE
2)
RX 162.100MHz
K,M,T,E
OT/DOT
stability wh en
by other than
TK-250
DISASSEMBL Y FOR REPAIR
1. Loosen the two screws
(
0 ) and
remove the frame
assembly from the case.
Note:
The case is stiff because of internal waterproofing. To avoid
marring the set wh en pulling it out, use a screwdriver covered
with a piece of cloth to depress the + side of the main unit báttery
connector and remove the case.
2. Remove the two shield plate screws ( f.) ), the speaker
connector,
the three contral printed circuit board screws
( @ ) and the two side switch FPC screws (
0 ).
3. Flip over the control printed circuit board and remove the
three connectors
(
0 ).
3
TK-250
DISASSEMBL Y FOR REPAIR
h
two knobs
(0)
an d the three roun d nuts
4. Remo,e1hte.
the "ngs stmattached.
( IJ ) w,
I{
lil I sllghtly an
Spcead the pane
sectIon 1abs;; ~/
d cemo,e the d;splay
(
Ii>
the panel gcoo'es
~::
land
51
cemo,e connec1ocCN4
.
I!!i»,
5. Remove the final shield plate, re move the two screws
((i)), the three TX-RX printed circuit board screws ( (D ),
and the two shield cover attachment
screws
(e),
and
remove the shield cover. Remove the two antenna coscrews (~
dered connections
) and re move the seven sol-
( ~ ).You can now remove the TX-RX
unit.
6. Remove the nine soldered connections
( ~)
and remove
the shield plate and the final module from the TX-RX
printed circuit board.
4
(;)
i!f(}
0
~'~~
è;U o
~J'
cemo'e the d p
axial connector
~
v
t@
'è~
Ii~
~f?C
~~~
~<'G~~I
'O~~
~ (i;../
o
~~~~X~~
TK-250
INSTALLATION
DRESSING PANEL (ACCESSORIES)
1. Pee10ft the right-hand
side ( the shorter section) of the
brown backing mate rial (
2. In the despression
0 )on the back
on the TK-250's
side.
top side, apply the
adhesive sheet (see Step 1. above) from the left-hand
side, and align it properly. The sheet adhesive is very
strong, so please align carefully.
Press the exposed port ion of the adhesive surface firmly
into place (
f) ).
3. Pee10ft the remainder of the brown backing material
on the back side and press (
0 )the
(@) )
sheet onto the main
unit.
4. Remove the backing
and press the dressing
0 ) from the
panel ( 0 ) into place.
material (
front si de
5
TK-250
INSTALLATION
DTMF UNIT(KDM-7 Option) ATTACHMENT
METHOD
Keyboard attachment
1. Pee10ft the right-hand
side ( the shorter section) of the
yellow backing material (
2. In the depession
0 )on the
on the TK-250's
back side.
top side, apply the
adhesive sheet ( see Step 1. above) from the left-hand
side, and align it properly.
The sheet adhesive is very
strong, so please align carefully.
Press the exposed portion of the adhesive surface firmly
into place (@).
3. Pee10ft the remainder of the yellow backing material(
on the back side and press (
unit.
4. Remove the backing
@) )
the sheet onto the main
material ( (1) ) from the front side
and press the keyboard (
6
e)
0 )into place.
TK-250
INSTALLATION
Keypad attachment
method
5. Loosen the two screws (
0 ) on
the underside of the
frame assembly and remove the frame assembly from
the case.
Note:
The case is stift because of internal waterproofing. To avöid
marring the set when pulling it out, use a screwdriver covered
with a piece of cloth to depress the + side of the main unit battery
connector and remove the case.
6. Remove the two screws
( (j) ) and remove the shield
plate.
Insert the keypad flat cable into the connector(CN204),
fold the flat cable as shown in the figure, so that the
cushion is inserted (
0 ),and with the
keypad bent back
out of the way, press it into place.
7. While pressing on the flat cable of the keypad, bend it
under the shield plate, " sandwich"
it there, replace the
shield plate and tighten the screws.
Pee10ft the keypad adhesive's
align the projections
backing material ( @ ),
atop the shield plate with the holes
( 11 ) in the keypad, press it firmly into place and return
the frame assembly to the case.
7
TK-250
rl
~H
I 11
I Clone mode
Tuning modeII
I
User Channel-setting
mode
mode
I Channel No.Clear function
I
I
Self program ming mode
REALIGNMENT
g mode
transceiver. Mode
ode
de
Normal
use
The
Initializes
dealer
thesets
function
the
each
functions
channel
and
eh
contents.
in
in
this
this
mode.
Function
The
Oestination
transceiver
data,
tuning
function
in this
data,
mode.
and
channel
Realignment
settings
are transferred
refer
to AOJUJSTMENT.
from orfrom
to an
PC.
Oestination
data,
function
data,
andmode.
channel
data method
settings
are transferred
or IBM
to another
2. Self programmnig
Wh en conducting self programming (clear function mode, channel setting mode, function setting mode, ) , please remove the TX-RX
unit (B/3) chip jumper(R332).
Note:
Self programming is 32ch model setting function for
one without FPU.
Setting methads are follows 4-1 , 4-2, 4-3. Other functions can't be used on self programming .
3. How to enter each mode
Mode
8
Power
ON
+ [DIA]
[PC
Mode]
[LAMP]
[LAMP]
++ [LO]
[DIA]
++Power
PowerON
ON(two
(twoseconds)
seconds)
Operation
TK-250
REALIGNMENT
<TOP VIEW>
LCD
CHANNEL SELECTOR KNOB
ANT
LED
VOU POWER SW
TOP PANEL KEY
<LEFT SIDE VIEW>
<FRONT VIEW>
<RIGHT SIDE VIEW>
LAMP
SP! MIC JACK
DRESSING PANEL or
DTMF KEY PAD(Option)
<LCD>
LO
TA
SCN
MON
BUSY
CALL
B ê tB. tB. tB. tB.
9
TK-250
REALIGNMENT
4. Test mode
In the test mode, the dealer initializes E2PROM data, and tun-
2) If the [LAMP] key is held down and the [LO] key pressec
when SEL is displayed, E2PROM data (except destinatior
data) is initialized. When the [LO] key is pressed, the tunin~
mode is entered. When the [TA] key is pressed, the sel
ing the trsansceiver and sets functions and channel data.
• Procedure
1) Press LAMP, DIA together and turn power on. Hold LAMP
and DIA until " SEL " appears on LCD.
programmnig mOde(function-setting mode) is entered
When the [DIA] key is pressed, the self programmin~
mode(channel-setting mode) is entered.
tl·,'j'
)fiX! ,~t/-'1
/fj /f}
,iT;;
ij--& :.':
Test mode display
0"
0
0' ..........•
0
Test mode
[LAMP]
[LO]
[DIA]
I
[TA]
---------,
I
I
I
I
I
:
Self programmnig mode
I
I
I
I
I
•...- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _I
:
4-1 Self programming mode (Clear function)
Test mode
The clear function initializes the memory before the dealer
sets functions and channels. The memory is not initialized at the factory. If the [LAMP] key is held down and
the [LO] key pressed in the test mode, the rnemory is
initialized(then
display indicate CLR while it is being
cleared), and the test mode returns.
[DIA]
Channel setting
[PTT]
1. Receive trequency setting
4-2 Self programming mode(Channel-setting mode)
In the self programming mode(channel-setting
mode), the
receive frequency, receive signaling, transmit frequency,
and transmit signaling for each channel are set.
[PTT]
2. Receive signalling setting
[PTT]
NOTE:
3. Transmit trequency setting
Self program ming mode is function for 32ch model.
When entered Self programming mode, channel setting
has been 32ch. To 160ch version , set on for using FPU.
1) Receive frequency setting mode
IPTT]
4. Transmit signalling setting
[PTT]
If there is no data stored in the E2PROM , " - - - - - " is
displayed. If the [LO] key is pressed, the initial frequency
is displayed. If there is data stored in the E2PROM, the
frequency is displayed.
5. SCAN Deletel Add tor each channel
If the [TA] key is pressed, the step changes between 5
kHz and 6.25kHz. (Initial value : 6.25kHz)
If the channel selector is turned, the frequency changes
in steps. If the [LAMP] key is held down and the channel
6. Busy channellockout
selector turned, the 1MHz digit is incremented
[PTT]
[PTT]
7. RF power
[PTT]
or decre-
ment. If the [PTT] key is pressed, the display frequency
is written into the E2PROM, and the receive signaling setting
mode is entered.
8. Beat shift
2) Receive signalling setting mode
If there is no data stored
displayed.
[DIA]
in the E2PROM , " - - - " is
If the [LO] key is pressed, the initialOT
value
of " 67.0 " is displayed. If the [LO] key is pressed again,
the inital DOT value of " 023N " is displayed. If there is
data stored in the E2PROM, the signalling is displayed.
10
[PTT]
-~----~---~---------------------~----------------------------------------------
TK-250
REALIGNMENT
If the [TA] key is pressed :
OT
: the mode changes between the EIA mode and
the fine tuning mode.
DOT
: the variabie digit changes from the third to
the second to the first and back to the third.
Selection in the standard table
023,024
.
Selection at every step
777 •....• 000 •....• 001 •....•....... 007 •....• 010 •....•........
If the [DIA] key is pressed :
OT
DOT
: Nothing changes.
: The mode changes between
verse.
If the channel selector is turned :
OT
DOT
ten into the E2PROM , and the receive frequency
mode is entered.
setting
5) SCAN DELETE/ADD activity
When the channel selector is turned, the display changes.
DEL •....• ADD
6) Busy channellockout
When the channel selector is turned, the display changes.
OFF •....• ON
7) RF power activity
When the channel selector is turned, the display changes.
H •....• M •....• L
normal and in-
: The frequency changes.
: The code changes.
If the [PTT] key is pressed, the display signalling is written into the E2PROM, and the transmit frequency setting
mode is entered.
8) Beat shift activity
When the channel selector is turned, the display changes.
ON •....•OFF
When 32channels
have been set, "END" is displayed.
If
the [DIA] key is pressed while "END" is beeing displayed,
the test mode returns (SEL is displayed). If the [PTT] key
is pressed , the receive frequency setting mode for one
channel is entered.
3) Transmit frequency setting mode
If there is no data stored in the E2PROM , " - - -- -- - " is
displayed. If the [LO] key is pressed, the receive frequency
for that channel is displayed. If there is data stored in the
E2PROM, the frequency is displayed.
Ifthe [TA] key is pressed, the step changes between 5kHz
and 6.25kHz. (initial 6.25kHz)
If the channel selector is turned, the frequency changes
in steps. If the [LAMP] key is held down and the çhannel
selector turned, the 1 MHz digit is incremented
or
decremented. If the [PTT] key is pressed, the display frequency is written into the E2PROM, and the transmit signalling setting mode is entered.
4) Transmit signalling setting mode
If th ere is no data stored in the E2PROM, " -- - -- " is
displayed. If the [LO] key is pressed, the intial OT value
of "67.0" is displayed. If the [LO] key is pressed again,
the initial DOT value of "023N" is displayed. If there is
data stored in the E2PROM, the signalling is displayed.
If the [TA] key is pressed :
OT
: The mode changes between the EIA mode
and the fine tuning mode.
DOT
: The variabie digit changes from the third to
the second to the first and back to the third.
Selection in the standard table
023,024
.
Selection at every step
777 •....• 000 •....• 001 •....•....... 007 •....• 010 •....•........
If the [DIA] key is pressed :
OT
DOT
: Nothing changes.
: The mode changes between normal and in
verse.
If the channel selector is turned :
OT
: The frequency
DOT
: The code changes.
changes.
If the [PTT] key is pressed, the display signalling is writ-
11
TK-250
REALIGNMENT
4-3 Self programming mode{Function-setting mode)
2) Battery saver
When the channel
,
,
[PlT]
[PlT]
[PlT]
8. END
Monitor
modeactivity
set
7.
Power
select
activity
6.
Talk
arround
3.
Time-out
timer
[PTT]
9.
Beep
mode
set
2.
4.
Battery
saver
Destination
set
5.1. Scan
Delate/
Add
activity
G
----
Test mode
r
[TA]
[J~
.!~ [~~
~
selector
changes.
OFF •...• S •...• M •...• L (OFF)
is turned,
the display
I
3) Time-out timer
~
When the channel
selector
is turned,
the display
changes.
I
~30 •...•270
•...•60
•...•300(60)
•...•90 •...• 120 •...• 150 •...• 180 •...• 210 •...•240
4) Scan
When the channel
r
selector
changes.
OFF •...• SCAN(SCAN)
is turned,
the display
is turned,
the channel
I
5) DELETE/ADD
When the channel
selector
changes.
r
DIA 1 •...• DI A2 •...• OFF(DI A2) .•
6) Talk around activity
When the channel
r
selector
is turned,
the display
is turned,
the display
is turned,
the display
changes.
TA •...• OFF(T A) .•
7) Power select activity
When the channel
r
selector
changes.
LO •...• OFF(LO) •
8) MONITOR mode set
When the channel
In the self programming mode(function-setting
mode). the
functions are set in the order listed below. When the [PTI]
key is presed, the displayed data is written into the
E2PROM, and the next item can be set.
•
( ): Initial value
r
OFF •...• SI81 •...• SI82 •...• SOL
selector
is turned,
the display
UHF1 •...•UHF2 •...•UHF3 •...•UHF4 •...•VHF1 •...•
VHF21
I
9) BEEP mode set
When the channel
selector
is turned,
•...• OFF(ON) ~
When the all the items have been set, " END"
played.
If the [PTT] key is pressed,
Code
12
Frequency
UHF2
UHF1450
470-490
45.05MHz
VHF1
VHF2
UHF3
UHF4
490-512
406-430
150-174
136-150
45.05MHz
LOWER
UPPER
-470 '
Band
Heterodyne
IF Frequency
Setting method refer to ADJUSTMENT.
is dis-
item 1 (Destination
set) appears again. If the [TA] key is pressed,
mode returnes (SEL is displayed).
5. Tuning mode
Destination setting configuration
the display
chahges.
ION
1) Destination set
When the channel
changes.
i
selector
changes.
the test
,
TK-250
REALIGNMENT
6. PC mode
•
Preface
The TK-250 transceiver is programmed by using a personal
computer, programming interface (KPG-22) and programming software (KPG-23D).
The programming software can be used with an IBM PC or
compatible. Figure 1 shows the setup of an IBM PC for pro-
•
CD
gramming.
Connenction
procedure
Connect the TK-250 to the personal computer with the interface cable.
cv Hold down the [LAMP] and [LO] keys, and turn the POWER
switch on. (Hold down the [LAMP] key for at least two seconds.) When the PC rnode in entered, "-PC-" is displayed
on the LCD.
When data transmitting from transceiver the red LED goes
on.
Wh en data receiving to transceiver the green LED goes on.
Notes:
• Do not connect the interface cable in the normal receive
mode .
•
The data stored in the personal computer must match VHF,
UHF, and IF when it is written into the E2PROM.
•
Do not press the [PTT] key during data transmission
•
reception .
Change the TK-250 to PC mode. then plug in.
or
IBM- PC
i
Fig. 1
)
•
KPG-22 description
(P.C. programming interface cable: Option)
The KPG-22 is required to interface the TK-250 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 side panel jacks of the TK-250 to
the computers RS-232C serial port.
• Program ming software description
The KPG-23D Programming Disk is supplied in 5-1/4" and
3-1/2" disk format. The Software on th is disk allows a user
to program TK-250 radios via Programming Interface cable
(KPG-22).
•
Programming with IBM PC
If data is transferred to the transceiver from an IBM PC with
the KPG-23D, 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 E2PROM in RS-232C format via the SP MIC plug.
In this mode the PTT and CLN lines operate as TXD and
RXD data lines respectively.
(
Parts No:
B62-0476-08
KPG-23D
Instruction
Manual
)
13
TK-250
REALIGNMENT
7. Clone Mode
Enter trom PC mode while pressing DIA key.
In the clone mode, two transceivers are connected together
and the contents of the E2PROM of one transceiver are copled to the E2PROM of the other.
The optional KCT-8 is used for cloning. For the connection
method, see Rgure 2.
KCT-8
Fig. 2
•
CD
CV
Procedure
Connect the two TK-250 transceivers in the clone mode
with the KCT-8 Interface cable.
On the data reception side, whlle depressing the [LAMP]
and [LO] keys, turn the power switch ON to enter the PC
mode (the [LAMP] key remains iIIuminated for two seconds).
Additionally, en the data trransmission side, press the [DIA]
key to enter the clone mode; " -C- " appears on the display.
Q) When the [MONI] key on the transmitter is pressed, the
E2PROM data is copied, and the ON AIR indicator lights. The
state of the receiver does not change. After (about 40 sec-
14
onds) the E2PROM copying ends, and "END" is displayed on
transmission side LCD. The ON AIR indicator on the transmitter goes oft.
If the [SCAN] key is pressed while END is being displayed ,
"- C -" is displayed again, and cloning is made possible.
Notes:
@)
•
VHF, UHF, and IF must match.
•
•
Do not press the [PTT] key during data transmission.
The TK-250/350 cannot be cloned with any other mode Is.
TK-250
REALIGNMENT
8. User mode
In the user mode, the user uses the transceiver.
To enter this mode, switch the power on in the use mode .
• Initial state
++-on
Al!
channels
DEL
Receive
OFF
OFF
Power
Initial
value
Lowest
OFF
channel
memorized
Backup
Backup
Backup
Each
CH
setting
Function/state
•
Functions
Encoder
MONI
TA
: Channel up/down
: MONI on/off
: The talkaround is turned on or off each time
DIA
: Scan delete/add change
the key is pressed.
1) Talkaround
The talkaround function is used to transmit data with the
receive frequency and receive signaling. The talkaround is
turned on or off each time the [TA] key is pressed. It does
not work during scanning. The talkaround is turned off if the
channel is changed with the encoder or if scanning starts.
The talkaround function can be selected in the self programming mode(function setting mode) .
r
Mode
Talkaround off
~
.j
Talkaround on
~
Transmit with the transmit
receive Function
frequency
frequency and
and receive
transmitsignaling.
signaling.
15
TK-250
CIRCUIT DESCRIPTION
1. OVERVIEW
The KENWOOD
2. CIRCUIT CONFIGURATION
model TK-250
The receiver is a double-convers
is a VHF/FM hand-held
transceiver designed to operate in the frequency range of
150 to 174 MHz. The unit consists of a receiver, a transmitter, a phase-Iocked loop (PLL) frequency synthesizer, power
supply circuits a contra I unit, a display unit.
BY FREQUENCY
ion superhetrodyne
with
a first intermediate frequency (IF) of 45.05MHz and a second
IF of 455kHz. Incoming signals from the anten na are mixed
with the local signal from the PLL to produce the first IF of
45.05MHz.
This is th en mixed with the 45.505MHz second local oscillator output to produce the 455Hz second IF. This is detected to give the demodulated signa!.
The transmit signal frequency is generated by the PLL
VCO, and modulated by the signal from the micraphone. It is
then anplified and sent to the antenna.
CF
455kHz
ANT
TX,RX
TX,RX
: 150-174MHz
: 136-150MHz
K,M, T, E
K2,M2
MCF
SP
195.05-219.05
181.05-195.05
: K,M, T, E
: K2,M2
MIC
150-174MHz
136-150MHz
K,M, T, E
K2,M2
Fig. 1 Frequency configuration
3. RECEIVER SYSTEM
Terminating
impedance
Insertion
Guaranteed
loss
attenuation
Attenuation
Pass
band
width
band
width
Nominal center
frequency
Ripple
The receiver is double conversion
superhetrodyne,
designed to operate
in the frequency
range of 150 to
174MHz(K,M) and 136-150MHz(K2,M2).
Item
(Spurious : 40dB or more)
4dB
1Rating
.OdB
oror
orless
less
80dB
more
within
±910kHz
45.05MHz
±7.5kHz
±22kHz
or
or
less
more
atat2.5dB
3dB
800Q/2pF
3.1 Front-end RF amplifier
An incoming signal from the antenna is applied to an RF
amplifier (017) after passing thraugh a transmitlreceive switch
circuit (08 and 09 are of!) . After the signal is amplified, the
signal is filtered by a Band-shift type band-pass filter to eliminate unwanted signals before it is routed to the first mixer.
3.2 First mixer
Pass
band
width
Terminating
Insertion
Attenuation
loss
band
impedance
width
Nominal center
frequency
Guaranteed
attenuation
Ripple
The signal from the RF amplifier
is heterodyned
with
the
XF1 : L71-0409-15(ExceptT)
Item
(Spurious : 40dB or more)
45.05MHz
±3.75kHz
4dB
1
±14.0kHz
80dB
.OdB
oror
orless
more
less
or more
less
within
atat40dB
±1000kHz
3dB
290Q/7pF
Rating
first local oscillator signal fram the PLL frequency synthesizer circuit at the first mixer (014) to become a 45.05MHz
first intermediate frequency (1st IF) signal. The first IF signal
is fed through two monolithic crystal filters (MCFs : XF1) to
further remove spurious signais.
16
XF1 : L71-0461-05(
T)
TK-250
CIRCUIT DESCRIPTION
3.3 IF amplifier
The first IF signal is amplified by 010, and then enterd IC2
(FM IC). The signal is heterodyned again with a second local
Guaranteed
40dB
6dB
Insertion
band
band
loss
width
width
attenuation
Nominal center
frequency
Terminal
Ripple
impedance
oscillator signal within IC2 to become a 455kHz second IF
signa!. The second IF signal is fed through a 455kHz ceramic filter to futher eliminate undesired signals before it is
amplified and FM detected in IC2.
±6.0kHz
455kHz
±12.5kHz
6dB
1.5kQ
oror
or
ormore
more
27dB
more
within fo±100kHz
1.5dB
Rating
orless
less
(455kHZ±4.0kHz)
Item
3.4 Audio amplifier
The recovered audio signal obtained from IC2 is amplified
by IC208 (1/2)(contral board), low-pass filtered by IC205 (2/
2), high-pass filtered by IC205 (1/2) and band-eliminate filtered by IC211 (1/2). The audio signal is then passed through
an audio frequency switch (0204) and de-emphasized by
IC211 (2/2). The processed Nominal
audio signal
passes
through
6dB
40dB
band
band
width
width
Guaranteed
Insertion
loss
attenuationan
center
frequency
Ripple
Terminal
impedance
audio volume control and is amplified to a sufficient level to
drive a loud speaker by an audio power amplifier {lC222).
CF1,2: L72-0927-05( E)
455kHz
6dB
25dB
oror
less
within fo±100kHz
±4.5kHz
±11.0kHz
or
ormore
more
2.0dB
or
less
(455kHz±3.0kHz)
Rating
1.5kQ
. more
Item
3.5 Squelch and mute
The output signal from the squelch circuit, which consists
of IC208 (2/2) and 0203, is applied to the microprocessor.
The microprocessor passes information to the shift registor
(IC213) and it contrals the mute contrallines (AF MUTE and
AC) according to the input signal (noise pulse) and the microprocessor task condition.
CF1,2 : L72-0922-05( T )
IC208(1/2)
Item
25dB
more
within fo±100kHz
455kHz
6dB
1.5kQ
oror
±7.5kHz
±15.0kHz
or
ormore
more
2.0dB
Rating
orless
less
(455kHz±5kHz)
IC208(2/2)
Q203
from
DET
20
CPU
IC221
IC213
CF1,2: L72-0906-05 (ExceptT, E)
AF MUTE
AC
OUTPUT
EXPANDER
Fig. 3 Squelch and Mute
ANT
DET
Fig. 2 Receiving system
17
TK-250
CIRCUIT DESCRIPTION
4. TRANSMITTER SYSTEM
4.1 Microphone
4.2 Modulator
amplifier
The signal from the microphone is high-pass filtered by
IC207 (1/2), passed through microphone mute circuit (0202),
limited and pre-emphasized
by IC207 (2/2), before being
passed to the low-pass filter network (IC216).
~
0
'"
(1/2)
M
1
ü
III R268
Cl: '"
ICl:
R252
R263
I-.•..... '" V02 3 .....•
1C276
-~I',,"I
I '"
11 C257
C266
'"0
IC207
6
Q202 «
5
R279
(2/2)
I
ILPFI
0504
I
I-
8
I
0501
18
~
HI
1!I
li
T~
R~",
Fig. 4 Microphone amplifier,
I
The output of the low-pass filter network (IC216) is passed
to the DIA converter
IC216
(ADJ) +
IC216
(2/2)
!LPF! ~L.S.D
I LPFI
A - 6
I BI
modulator
(IC206) for maximum deviation adjust-
ment and the summing amplifier (IC201 2/2) before being
applied to a varactor diode (0504) in the voltage controlled
oscillator (VCO) located in the frequency synthesizer section.
TK-250
CIRCUIT DESCRIPTION
4.3 Driver and final power amplifier
4.5
The transmit signal is directly generated by the VCO. The
transmit signal obtained from the VCO buffer amplifier 012,
is amplified by 015, to approximately 2dBm. This amplified
Automatic power
level switch
The automatic
control
power control
and transmitter
output
(APC) circuit stabilizes the
transmitter output power at a pre-determined level by sensing the collector current of the final amplifier transistor in the
signal is passed to the power module(IC5). The power module consist of a 3-stage amplifier and is capable of prod~cing up to 4.8W .
power module. The voltage comparator (IC4) compares the
voltage obtained by the above collector current with a referen ce voltage, set using the microprocessor
and 018. An
APC voltage proportional
to the difference between the
4.4 ANT switching
The power module output signal is passed through a 3stage low-pass filter network and a transmit/receive switching circuit before it is passed to the anten na terminal. The
transmit/receive switching circuit is comprised of 08 and 09.
08 and 09 are turned on (conductive) in transmit mode and
turned off (isolated) in receive mode.
sensed voltage and the reference voltage appears at the
output of IC4. This output voltage controls 016, which in
turn controls the voltage at pin 2 of the power module, which
keeps the transmitter output power constant. The transmitter output power can be varied to 1W or 2W by the microprocessor, which in turn changes
IC4, and hence the output power.
the reference voltage of
IC5
I RF
POWER
AMP
I
I LPFI
CI04
C!08
C113
5T
swi
IRF
LIl
I
L13
I
08
L!4
C123
ANT
AMP.
I
Q16
A57
CI07
Cl!!
+
B
oo
<D
'"
(J
c::;
I A62
I
CI06
I
C112
R53
A5!
'"
...J
loc swi
Q19
L17
(Drive and final power amplifier, ANT switching, APC and transmitter
output level switch)
Fig. 5 Transmit power system
19
TK-250
CIRCUIT DESCRIPTION
5. PLL FREQUENCY SYNTHESIZER
5.1 PLL
The frequency step of the PLL circuit is 5 or 6.25kHz. A
12.8MHz reference oscillator signal is divided at IC3 by a
fixed counter to produce the 5 or 6.25kHz reference frequency. The VCO output signal is buffer amplified by 013,
then divided in IC3, by a dual-modules programmabie counter
in this case. The divided signal is compared in phase with
the 5 or 6.25kHz reference signal in the phase comparator
also in IC3. The output signal from the phase comparator is
low-pass filtered and passed to the VCO to control the oscillator frequency.
5.2 Voltage controlled oscillator(VCO)
The operating frequency is generated by 0504 in transmit
mode and 0505 in receive mode. The oscillator frequency is
the phase comparator , to the varactor diodes ( 0501 in
transmit mode and 0502 and 0503 in receive mode). The TI
R pin in set high in receive mode causing 0501 and 0502 to
turn off 0504, and turn on 0505, and is set low for transmit
mode. The outputs from 0504 and 0505 are amplified by
0503 and outputed to the buffer amplifiers.
5.3
Unlock detector
If a pulse signal appears at the LO pin of IC3, an unlock
condition occurs , the OC voltage obtained from 09 and
011, causes the voltage applied to the UL pin of the microprocessor to go low. Wh en the microprocessor detects this
condition, the transmitter is disabled by ignoring the pushto-talk switch input signa!.
controlled by applying the VCO control voltage, obtained from
-
~-------I
•...
I
I
012
~
L50 lOGO'
I RF
BUFFER
R31
I
AMP.
IC3
ce3
L24
CI32
~
C;01
I
~mrT
0131
C'.'-_
I
A11
RlO
XI'
~ï ~ï ~l
R22
DO
ASOJ
011
UHL
11R
lO
10 "FIN
09
001
XI
12.
Fig.6
20
PLL frequency synthesizer
8101Hz
PLL
OT
13
CK
11
DAT"
"'I"~
TK-250
CIRCUIT DESCRIPTION
6. POWER SUPPL Y CIRCUIT
6.1 Power switching
A 5V reference voltage is derived from an external power
supply or internal battery by IC1. This reference is used to
provide a 5V supply in transmit mode [5T] , and a 5V supply
in receive mode [5R] and a 5V supply common in both modes
6.2 Battery sa ver
If no activity is detected(squelch closed) on the channel,
the units enters into the battery save mode controiled by the
microprocessor
and shift registor. In this mode, SAVE line is
set low, causing Q4 to disable [5SV].
[5C] and [5SV] based on the control signal se nt from the
microprocessor or shift register. IC203 and IC204 in the control unit provide a 5V supply for the control and display circuits .
..,.
5T
([)
'"
ü
cr:
TX-RX section
o
CV)
Q5
IAVR
I
KEY(APC)
I Cl
SB
r--
1+
Ü
Q7
5SV(VCO)
0)
cr:
'"
'"
SAV
ü
1
Q4
5R
..,.
cr:
I DC SW
5SV
T/R
I DC
SW
I
I
t~
Power supply
SB
+1
co
CV)
N
Ü
Fig.7 Power supply circuit
(Power switching, battery saver)
21
TK-250
CIRCUIT DESCRIPTION
7. CONTROL UNIT
The control unit consists of microprocessor IC221 and its
peripheral circuits. It controls the TX-RX unit and transfers
7.1 OT, DOT encode
The OT, DOT encoder tone is set by the data from the
microprocessor(lC221).
The OT, DOT tones are applied to
data to and from the display section. The CPU (IC221) mainly
performs the following :
the VCO and VCXO (X1) after passing through the
1) Switching between transmission and reception by PTT
signal input.
vertor (IC206) for tone deviation
ming amplifier (IC201).
2) Reading channel, frequency,
IC212, 220.
7.2 OT ,DOT decode
and program
DI A conand the sum-
data from
3) Sending frequency program data to the PLL.
A part of the recovered audio signal obtained at the amplifier IC208 (1/2) are the OT and DOT tones and are low
4) Controling squelch ON/OFF by the pulse signal input
from the squelch circuit.
5) Controling
put.
adjustment
the audio mute circuit by decode
pass filtered by IC214
sor for decoding.
data in-
and passed to the microproces-
(1/2)
6) Transmiting encode data.(OT, DOT)
7) Sending serial data to output expander (IC213) to control various function in the unit.
C259
IC206
AMP
IBUFF!
IC210
(AOJ)
~/A
( 1/2)
R255
1
,81 VREF
•.•.• 3
19
v03110
v 13
a:
V02,3
IC201
(2/2)
5
R224
"'
N
~
6i18
"'
N
R220
..,.
,.
A216
R2S'
RZ12
Rl66
SM
IQ
<D
~
<Ot I C208 ~
T~
~
a:
R219
to TX VCO
(1/2)
R230
~l ;;;
'"
DET
to
(IC214
1/2)
3
3 "'C23B
U
A2G8
N
IC205
~
~
5MT
a:
CXJ
BIAS2
BIAS2
N
N
C260
R232
2
4
a:::
VCXO(Xl)
LSD
to
L. S. D(QT.
IN
CPU( IC22
DQT)
from CPU(IC221)
Encode circuit
Decode circuit
Fig. 8 OT, DOT en code, decode
~
7.3 CPU clock shift
Q209
When the CPU (IC221) 12MHz clock (X202) high frequency
(actually the integral double high frequency of 6MHz because
it is halved) is multiplexed with the recept ion frequency, it
becomes an internal beat signal, supressing the signal sensitivity. To prevent this, by turning 0209 ON, the clock
frquency is shifted (about 4kHz) .
(Shift ON/OFF can be set through programming.)
VDD ,58
C331
IC221
..,
.•.
..,
a:
~Xl
251 X2
[§]
Fig. 9 CPU clock frequency shift
22
----------
TK-250
CIRCUIT DESCRIPTION
8. DISPLAY CIRCUIT
9. DTMF
The display circuit consists of the CPU, LCD, and peripheral circuits. The CPU (IC451) mainly controls the following
functions :
9.1 DTMF encode
1) Transmitting the ON/OFF serial data signal from the
SCAN switch, DIA switch, TA switch, LO switch and
rotary encoder (channel selector) to the control unit.
2) Receiving the serial data signal from the control unit
and displaying the data on the LCD. The LCD contains
the 13-segment display and BUSY, CALL, SCAN, and
other indicators. Controls the LEDs (TX, BUSY LAMP).
3) Wh en the power is initially turned on, the reset circuit
(IC452) resets both the display CPU (IC451) and the
main CPU (lC221).
Once a signal is passed from the DTMF keypad to the
microprocessor.
The microprocessor passes this information to the DTMF encoder (IC219) for encoding. The encoded signal is then passed to IC206 (DI A convertor) for
DTMF deviation adjustment. This signal provides a TX DTMF
tone and a RX DTMF tone. The TX DTMF tone is passed to
the pre-emphasis circuit (mie. amplifier) and then to the VCO.
The RX DTMF tone is passed to the de-emphasis circuit,
audio power amplifier and then to the speaker.
9.2 DTMF decode
The DTMF input signal from the DET line passes through
the low pass filter (IC205 2/2) and is then passed to IC218,
DTMF decoder. The decoded information is th en processed
by the microprocessor.
m
w
m
[IJ
KEY PAO(OPTION)
D
[Q]
[Q]
J
w
[TI
[i]
IC206
DJ
to MICAM~ (TX TONE)
21. v I?
24.
to
v IB
D~ EMPHASIS(RX TONE)
OCO
IC219
TON
OC I
~3
?ISCL
SOA
C2H
POl
IC221
~
;:;.1.
~
~T
~
'"
N
a:
IC205
(2/2)
B
'"
M
a.
R2l61R212
f rom
IC20S (1/2)
Fig.10 DTMF. encode, decode
23
TK-250
SEMICONDUCTOR
Main microprocessor:
78312AGF3553BE
DATA
(IC221)
• Pin connection
A12
RESET00000000
WR
P35
P36
P37
RD
o AD1
A14
A15
A11
A13
A10
EA
P34
000
78312AGF3553BE
f-e.I1Jf-....Jz
~o
«
«f-f-«üW
00000000000000
WRPRO
DATA2
A8
ADO
A9
ALE
QT/DOT
P14
P13
P12
P10
P24
P11
P23/INT2
P26/D.TXD
P25/PTT
P21/INTO
RFSH
P06
P07
PH
P22/INT1
P20
P15
P16
1
3
15
26
7
8
9
10
13
4
CDCDCDCDCDL()L()L()L()L()L()L()L()
5
11
18
19
16
1217
14
NNNNNNNNNNC')C')C')
o~
Oü(/)O(/)
a.
««««««>a.a.a.a.a.a.
N C')'<t
C')N
r-
0
(J)
co
L() CD I'-. oOr-
I'-. CD L() '<t
N C')'<t
42
r-
46
48
41
40
34
35
36
47
51
45
44
49
37
39
50
43
33
38
L()
C')N
OT"""(\JCf).,.....NUJO.,.....C\J('f)tbcn
C')C')C')C')xx(J)zzzza:(J)
a. a. a. a.
>««««>~
....JZ....Ja.
Z
(/)~
(5
(/)
OO::>~
24
:3
....J
f-LL
f-....J
«W
en(/)
«
TK-250
SEMICONDUCTOR
• Pin function
DATA
--0
GND.
Address
ADO-AD7
+5V.
A8-A15
Extemal
Power
onaccess.
address
lateh.
reset.
address/data
bus.
bus.
Write
Read
[bus].
12.000MHz
(system
clock).
P24
DFDV
P20
P17
NMI
WR
P12
P11
PEN
Pin
Name
P14
AVREF
P32
DKEY7
P27
KEY
I . generater
AN3
X1
AN1
P31
DKEY4
BATT
P23/1NT2
P22/1NT1
HSDIN
GND.P21/1NTO
ITEST
DRXD
DKEY8
DKEY3
DKEY2
POO
P06
RESET
EN1
Port
Name
P10
P16
P15
P35
P36
DKEY6
UL
DKEY1
DKEY5
DATA2
Vss
X2
GND.RFSH
P07
P37
P01
P03
WRPRO
STB
SCL
110
110
ISHIFT
AVss
ALE
P33
LAMP
ANO
VOD
RD
P34
EA
ADO
-AD7
OT/DOT
LSDIN
P13
P25/PTT
P26/D.TXD
P30
P02
P04
P05
A8-A15
SOL
DATA1
MON
PTT
D
TXD
AN2
Function
SELF
Low
speed
data
input.
DTMF
decode
detect
input.
High
speed
decode
deta
input.
For
display
serial
data
input.
Key
Pad
Column-1/DTMF
Column-2/DTMF
Column-3/DTMF
Column-4/DTMF
Decode
data-O.
data-3.
data-2.
data-1
SELF
MONI
PLL
PTT/program
'TIR
System
Open
Voice
Low
Parallel
Serial
Shift
Data
unlock
(Transmit
speed
Pad
programming
register
output
switch
clock
(not
scrambler
E2PROM
clock
Row-3.
Row-4.
used).
detect
data
output.
input.
with
strobe
RXD.
shift
Active
CT
DATA
data
write
programming.
input.
contral
prat
(DO)
output.
"Low").
output.
(D1)
proteet
eet
output.
input.
output.
output.
(not
used).
LAMP
switch
input.
BATT
check
input.
Noise
pulse
input.
D/Aconverter
For
PLL
Serial
Key
display
enable
data
E2PROM
output
Row-1
Row-2.
serial
output.
enable
data
.(RX)
/(signalling)
(TX)
Shift
output
data
register
output.
I input
data
I output
Tone
/ D/Aconverter
data- output.
data output.
Pin Open
No.
0
1
25
TK-250
SEMICONDUCTOR
Display microprocessor:
75308BGK739BE9
DATA
(IC451)
• Pin connection
812
813
814
~o
3
58
o
o
o XT2
59
o
X2
X1
NC
4
57
816
5
56
817
6
55
o XT1
o
815
VOD
7
54
819
8
53
P33
820
9
52
P32
10
51
P31/8YNC
50
P30/LCDCL
P23/BUZ
818
821
822
11
75308BGK739BE9
823
12
49
824/BPO
13
48
P22/PCL
825/BP1
14
15
16
17
47
P21
826
827
828
829
830
831/BP7
--0
P20/PTOO
o P13/T10
44
o P12/1NT2
18
43
o P11/1NT1
19
42
o P10/iNTO
20
41
+5V.
GND.
(not
used).
Open
LCD
voltage
(not
used).
P71
P12
Pin
Pin
Function
Name
Name
Pin No. 46-49
1IP23
1Ilevel generator.
VLCOVLC2
P72
P50
GND.
RE8ET
P13
P10
NC
57
BIA8
COM1
COM3
P60
P11
P51
P03
80-811
812-831
1/0
Function
P70
P61
POO-P02
64
61
LCD
COM1.
COM2.
COM3.
VDD
COMO.
P30
P33
0input.
50
53
54
COM2
Vss
COMO
P40-P43
XT2
XT1
P73
P2055
66
67
68
69-80
60
65
56
P31,32
P52,P53
X1,X2
58,59
P62,
63
62,63
51,52
8ystem
clock
input
TA
Power
switch
on
reset
input
input.
8erial
8CN
Rotary
D/A
LO
GREEN
Test
8erial
LCD
LAMP
Reset
switch
switch
switch
output
output.
power
(TX)
(RX)
encoder
output
LED
LED
data
input
data
input.
output.
supply
(820-80).
output
input.
input
output.
voltage.
Pin RED
No. LED output
1
46
45
• Pin function
26
P60/KRO
60
P03
TK-250
,
I
SEMICONDUCTOR
DATA
D/Aconverter : M62363FP (IC206)
• Block diagram
• Pin function
0
GND
terminal
Terminal
tor
determining
the
DIA lD
-I-input
Power
terminal
When
asupply
low
level
signal
isbit
input
toconversion
RESET
terminal,
alllevel,
thelevel
DIA
output
register
value
becomeis entered, and data can
lD
Pin
V
VREF
11
I code
V05
VOl
VI5
DO
0
GND
VI7
VI3
VI2
VOD
VI6
VI8
V06
V08
RESET
ClK
resolution
V04
V03
VI4
8-bit
V02
V01
0the
DIA
terminal
DI
110
DIA
converter
input
terminal
When
the
terminal
isreterence
at
the
lowpoint
the doek
converter
terminal
D/Aconverter
12-bit
shift
register
MSB
data
is the
output.
data
input
terminal.
Input
serial
data
bits
long.
Shift
doek
input
terminal.
With
the
rise
ot 12
theFunction
shift
doek,
the
input
signal
trom
the
DIion
terminal
be
uptaken
by
12-bit
shift
register.
Then
at
the
threshold
rising
trom input
low
torecept
High,
themode
12-bit
Pinserial
No.
low.
shift
register
value
is
loaded
to
the
DIA
output
register.
Vo
= (VIN
- VOAref)
n/256
+ VOAref
input
to the
12-bit Xshift
register.
27
--
TK-250
SEMICONDUCTOR
DATA
DTMF decoder: TC35305P/F(IC218)
• Internal bock diagram
-zërö _u_~
- - i3änëJ;;äss- filter
r---
crossing
detector
High-
IN
0
group
bandpass
Dial tone
filter
Timer
control
circuit
Low-
ClK
OSCE
@'
group
0
I
II
Timing
generator
circuit
Vss
_I
J
_
Internal
clock
Reference
voltage
Bias circuit
Vee
Ibandpass
PD
• Pin function
Reception
data
output
terminal.OV)
Power
supply
terminal
(normally
5V)
OT1
ClK
X1
PO
Name
OSCE
OT3
OFOV
X2
OTO
OT2
OE
IN
Vee
1/0
Function for the stipulated period and is detected.
Vss
0I- aswhen
1/0
,0
01-04
3-state
control
terminal.
3.579545MHz
quartz
crystaL
Oscillation
control
terminal.
Signal
terminal.
3.579545MHz
crystaL
OE
OSCE
= "input
H Pin
=
"stage
H
"terminaL(Nrmally
;when
external
cloek
code.
Enters
standby
mode
" l output
"code
istone
applied.
"quartz
an
the
effective
4-bit
. pair continues
Pin No.Becomes " ;Houtput
H
"
;
enable
OSCE
=
"
=
l
"
"
H
;
high
"
;
external
impedance
cloek
input
OE
Connected to VOO when using an extemal clock.
impedance
OE = " l" ; high irnpedance
(
28
TK-250
SEMICONDUCTOR
PPROM
DATA
: XL24C01 AF (IC220)
: BR24C01 AF(IC220)
• Bock diagram
1,024 bit E2PROM
aray
8 IVCC
AG
Slabe word
Address register
A1 12
Data
register
7 I WC
STOP
6
I
SCL
Control circuit
ACK
SOA
• Pin function
• Pin layout
VCC
1-3
WC
45
6SCL
78
SDA
Referenee
voltage
-IFunction
for alil/O,OV.
Conneet
to1-A2
the
power
supply.
Pin
Name
Vss
AO-A
Con
WC
neet
to
GNO
VCC
SOA
SCL
1/0
1/0
slave
and
word
address,
serial data inSlave
address
setting(terminal)
Se
rial
doek
input
Pin No.
put/output
o
- The SOA terminal is the N eh open drain output, so use with a pull-up
resistor attaehed to the outside.
AD
A1
A2
GND
29
TK-250
SEMICONDUCTOR
DATA
Power module: M67755HA(K, M, T, E)
M67755LA(K2, M2)
• Equivalent circuit diagram
r------
-- - -- - -- -- -- - -- ---
I
I
I
I
I
L
1
1
tr
I
----1
1
IT
_
I
I
--
Electrode configuration
1. Input terminal
2. First power supply terminal
3. Base bias power supply terminal
4. End power supply terminal
5. Output terminal
6. Fin (earth)
30
I
J
TK-250
)
J
DESCRIPTION
TX-RX UNIT: TX-RX section (X57-4440-10)
Ref. No.
OF COMPONENTS
A/3
Mixer
D1F20
Parts(S)
MI809
1SS312
HSM88AS
RF
switch
HVU350
2SC5090
DTA114YE
DTC143EE
DTC144EE
DC
switch
MC3372V
1SS368
NJMI458M
SGM2014M
NJU7201U50
2SJ243
DTA123JE
PLL
unlock
detector
MB1512PFV-G-BND
amp.
Temprature
protection
Overload
protection
Varactor
tuning
2SC5066(O)
2SC4226(R24)
2SB1119
2SK1215(E)
amp.
buffer
TX
amp,
amp.
driver
2SC4617
2SK208(O)
Current
Ripple
Buffer
amp,
filter
steering
M67755HA(K,M)
2SA
1832(GR)
Voltage
Reverse
IFamp,
M67755LA(K2,M2)
detector
Regulator
polarity
protection
(APC)
5V
Phase
locked
loop
systemDescription
2SC4215
2SB1119(S)
(Y)No.
RF
Power
amp,
IF
system
)
TX-RX UNIT: Control section (X57-4440-10)
Ref. No.
8/3
XRU4094BCFV
HN58C257T-20E2PROM
or BU4094BCFV
TC74VHC573FS
Address
latch
MC33172D
TA75W558FU
Active
filter
NJU7201
U50
TC7S66FU
NJU7201U50
Audio
mute
switch
Parts
filter,
Limitter
M62363FP
TA75W01
FU No.
Description
Shift
registor
Active
Audio
amp.
DC
shift
Audio
amp.,
Active
filter
D/AConverter
(Adjustment)
Voltage
Regulator
5V
Buffer
amp.,
Suming
amp.
31
TK-250
DESCRIPTION OF COMPONENTS
Ref. No.
Parts
No.
TC7S32FU
DA221
PCD3312CT
E2PROM
DTA144EE
Audio
mute
switch
MIC
AMP
detection
XL24C01AF
TC7S04FU
TC35305F
78312AGF3553BE
Address
Active
DTMF
BR24C01AF
AMP
filter
decoder
decoder
level
control
TA7368F
TA75W01FU
2SK1588
DTC144EE
2SK1824
2SJ243
DC
switch
Description
2SK879(Y)
2SC4215
(Y)or
Microprocesser
Voltage
clamp
TONE
(DTMF)
encoder
2SA
1362
1586
(Y,
(GR)
GR)
Clock
Audio
Buffer
frequency
power
amp.
amp.
shift
TX-RX UNIT: Display section (X57-4440-10)
Ref. No.
C/3
S-8054ALB-LM830-2047-05
B30-2019-05
T1 back
75308BGK739BE9
Reset
Switch
Parts No.
Microprocesser
LCD
Red,
green
light
(LED)(display) Description
VCO UNIT (X58-4130-10)
Ref. No.
32
TX
1SV228
UMG2
DTC144EE
2SC5090
1T363A
VCO
DC
switch
oscillator
No.
MA360Parts
2SC4226
(R24)
RF modulation
buffer
amp.
contrpl
VCO
voltage
control
Description
TK-250
PARTS LIST
u
* New
Parts.
Parts without
Lh
indièates
Parts
No.
safety
are not
critica
L
I components.
Scandinavia
Y : PX (Far East.
supplied.
Y : AAFES
I\
Les articles
non mentionnes
Teile
ohne Parts
No. werden
~
dans
Parts
nicht tegeliefert
No.
ne sont
Hawaiil
(Europe)
K: USA
P : Canada
T : England
E : EUfope
X : Australia
M : Other
Areas
pas fournis.
TK-250
·
TX-RX UNIT (X57-444X-XX)
Desti28E37-0435-05
18E37-0437
FLAT
-05
CA8lE
TX-RX
CN1-CN201
3AG53-0767
ITEM
-04
H52-0560-04
CARTON
CASE
28
E23-0998-04
2AG53-0766-03
872-0706-14
30escription
lCJ21-4463-04
E23-0966-04
E23-0474-14
28G53-0742-14
30
2C843-11
38
20K29-4800-04
E04-0192-05
KENWOOD
8AOGE
2C809-0344-03
A40-0635A62
-0345-04
STANOARO
80TTOM
PANEL
13
ASSY
PLATE
LA8El
862-0446-00
30
20J21-4474-04
J21-4462-04
HARDWARE
FIXTURE
PTT
20G01-0867-04
Fl0-2112-02
Fl0-2115-04
SHIElOING
COVER
TX-RX
J29-0616-23
872-0844-14
872-0923-04
3AK29-4920-03
28J19-1525-04
3AJ69-0331-05
38J82-0032-35
3A
18
20J69-0330-05
2A
10J39-0604-04
J21-4461-03
J82-0033-05
J99-0337
J69-0321-05
K29-4917-02
K29-4918-03
K29-4919-03
KN08
HOLOER
-04
VOLUME
ANTENNA
CHANNEl
KEY
TOP
H12-1470-02
PTT-CN202
A21A13-1611-12
1544-03
FRAME
872-0707
-14
18Fl0-2114-03
Fl0-2113-23
TX-RX
lEAD
WIRE
WITH
CONNECTOR
SP
PANEL
GRANO
TERMINAL
POWER
MODULE
8ATTERY
TERMINAL
IN
OUT
SIOE
DE
00-04
RF
COAXIAl
RELEASE
CA8lE
RECEPTACLE
3C842-3394-14
CAP
ACCSSSORIES
2C
J21-4464-14
ACCESSORIES
Gll-0617-04
CUSHION
COll
SPRING
8ATT
lEVER
TERMINAL
POWER
KN08
RING
SPACER
HOOK
PROTECTION
AOHESIVE
846-0409-40
CH,VOl
80TTOM
PTT
ACCESSORIES
MIC
FIXTURE
TAPE
8AG
BAG
PLATE
ACCESSORIES
T
E
60Xl1
100X200
0 SIMODULE
DRESSING
PANEL
ACCESSORIES
MODEL
NAME
PLATE
38
PLATE
CONTROLE
A02
-1829-01
PLASTIC
CA81NET
PACKING
HOLDER
SPEAKER/MIC
K,M
28,20
WARRANTY
CARO
ACCESSORIES
K2,M2
Pans
VOL.CH-CN205,CN451
No.
SPEACER
INSTRUCTION
MANUAl
(EN,SP.FRI
D
ISElECTOR
K,K2
Ref,
No,
20
Ref. No.
~ ••• I
I IAdlkessl
30SP201
80
C3
C8
C28
C9
C32
Cl0
C14
C40
C19
C20
C34
C33 -7
,35
C38
C37
C15
C16
C18
C21
C24
-26
C23
C30,31
C12,13
C39
28
A
C29
C41
C17
C22
Cll
C36
nation
cn
Pans
No_ New
78-2080-46
N
N14-0562-04
09-2185-05
JK
14-0545-04
3A
lOWV
25WV
2A
W
02-1814-05
18
T07
-0314-05
T90-0450-05
KMTE
18,38
2C,30
N39-2020-46
N99-0387
R
05-3471-05
PAN
SCREW
-05
HEAO
SET
MACHINE
ACCESSORIES
SCREW
38
20
18,28
28,38
N09-2251-05
N88-2005-46
17-1026-60
14-0560-04
CIRCUlAR
NUT
ANTENNA
100PF
8
38-0717-05
lED
DISPLAY
830-2047-05
8ACK
ASSY
LIGHT
lCD
09-1492-05
811-1107-04
REFRECTOR
lCD
0.10UF
Cl
04K
1000PF
Adlkes
10WV
4.7UF
CHIP-TAN
C92-0606-05
CK73G81
H471
K
CHIPC
0.010UF
470PF
K T90-0381-05
15PF
CK73G81H471K
CK73G81Hl02K
C92-0003-05
33UF
C92-0543-05
18PF
CHIP
CAN
35WV
0.33UF
C92-0502
-05
1.0UF
CHIP-T
C92-0519-05
Hl
03K
3.3UF
22PF
CC73GCHl
H220J
ENCOOER
CHANNEl
SElECTOR
HELICAL
150-162MHz
POTENTIOMETER
HELICAl
ANTENNA
K2,M2
lOKA
134-150MHz
TOOTHED
FLAT
HEAO
lOCK
TAPTITE
WASHER
SCREW
CC73GCH1Hl01J
N09-2053-05
PAN
SEMS
HEAO
SCREW
SCREW
TAPTITE
M2X35
SCREW
81NOING
HEAO
SCREW
M26X8
830-2019-05
02K
CC73GCHl
Hl
01
JM2.6X35
CK73G81
Hl
H471
03K
K
CHIPC
H150J
0.47UF
CHlP-TAN
CHIP-TAN
H180J
CK73G81Hl02K
C92-0606-05
Hl03K
CHIP
C
C92-0543-05
H220J
lED
RED/GREEN
NUT
CH,VOl
lOUOS
PEAKER(
FUllRAN
GEI 8lK
CIRCUlAR
CH,VOLl80TTOMI
Description
parts28,38
nation
ACC
Desti-
H
E
lCOl
ENl
M
J0451
C
8
G
K
0452
0
TX-RX
UNIT (X57-444X-XX)
C2
VRl
F
l 80
101
0-10: K,M 0-11:K2,M2 0-51:T 2-71:E
33
TK-250
PARTS LIST
TX-RX UNIT (X57-444X-XX)
Parts No.
25WV
lOWV
B
Admess
K
0.010UF
22PF
K CC73GCH1
O.OlOUF
27PF
D
10PF
1.0UF
CHIP-TAN
16WV
22UF
6.3WV
lOUF
JK
100PF
10WV
470PF
60PF
8.0PF
3.3UF
12PF
KMK2M2
E
4.0PF
2.5PF
10UF
CHlP-T
AN
0.10UF
1000PF
40PF
T
50PF
18PF
90PF
15PF
C
3.0PF
2.0PF
KMTE
CHlP-TAN
CK73GB1Hl02K
-0519-05
H102K
CHIP-ELE
C92·0578-05
CK73GBl
CHIPC
CC73GCH1H101J
Hl
02K
CHIP
CK73GB1
C92
Cnation
-0543-05
H47l
H060D
H080D
H120J
KJ
H040C
H270J
T,E
K.M New
T.E
K,M
CK73GB1H103K
H103K
H1OOD
C92-0519·05
Hl02K
-0566-05
Hl03K
H020C
K,M,T
C92-0536·05
CC73GCHl
H2R5B
H220J
C104K
K2,M2
H471
H030C
K,M.E
H101
H050C
H090D
H180J
H040C
H1R5C
Hl
OOD
H150J
Description
parts Ref.
No.
cm
C141
C126
C106
Cl08
C142
C113 03
C114
C115
C131
C130
C139
Cl01
C140
C109
C111
C1l5
C116
Cl04
C102,1
C105
C114
C128
CllO
C14l
C93
cm
cm
C117
C134
C99
C104
C107
C203,204
C121
C201
C124
C94
C95
C126
C132
C96
C110
C202
C205
C113
C125
C100,98
C136-138
C101
C119.120
C97
C206,207
C108
C118
C133
C139
Desti-
Parts No.
K
JC
K
D
35WV
Admess
l8PFT
l6WV
22UF
CHlp·ELE
8.0PF
10PF
27PF
20PF
12PF
0.010UF
39PF
K CK73GBl
2.0PF
E
15PF
18PF
KMTE
7.0PF
22PF
100PF
1000PF
0.33UF
CHlP-TAN
New
CK73FB1
H102K
3.0PF
H070D
H030C
C92-0578-05
H030C
CK73GB1Hl02K
H120J
T,E
H080D
H1OOD
KMK2M2
K2,M2
H1R5C
CC73GCH1
Hl
H270J
02K
CK73GB1
Cl
04K
03K J
CC73FCH1
CC73FCH
H103K
1H390J
K2.M2
H150J
H180J
0.10UF
C104K
CC73FCHl
H220J
H270J
CHIPC
H101
CHIP
C nation
H102K
C92-0502-05
H180J
Hl03K
T.E
H220J
H120J
CC73GCHl
H020C
H070D
H101J
Description
CHIPC
parts
!I"
Desti-
(I
(
(
(
,(
(
34
TK--250
PARTS LIST
TX-RX UNIT (X57-444X-XX)
Parts No.
Address
lOWV
010WV
0.010UF
100PF
K CK73GBl
25WV
3.3UF
1000PF
JK
3300PF
180PF
CK73GBl
H332K
O.022UF
4700PF
H472K
K
6800PF
10UF
0.022UF
47PF
E
0.047UF
27PF
10PF
000
E
CK73FBl
Al
05K
0.027UF
CmK
560PF
0.039UF
02K
1200PF
H122K
750PF
CK73HBl
El
0.10UF
Now
CHIPC
CC73GCH1Hl01J
03K
02K
Hl
03K
CHIP-TAN
C92-0519-05
C92-0543-05
Hl
Hl
01J
CC73GCH1H181J
CK73GB1Hl03K
E223K
Hl03K
CK73HB1Cl03K
H682K
CHlP-TAN
C92-0536-05
CC73GCHl
H470J
CK73GB1Hl03K
CK73GB1Hl02K
C473K
CHIP
C nation
H270J
CK73EB1Hl03K
CK73EBl
K.M,T
H561
C393K
K
C92-0519-05
CC73FCHl
H751J
Cl
04K
K2.M2
K.M.T
Description
parts 1.0UF
Ref. No.
C455
C327
C333
C346
C360
C281
C282-291
C363
C451
C303
C312
C316.317
C313-315
C323
C329
C332
C335
C340
C347 -350
C351
C351
C354
C353
C352
C356
C358
C452-454
C300,301
C302
C318,319
C324-326
C330.331
C339
C343
C344
C345
C355
C357
C359
C293,294
C316,317
C337,338
C278-280
C361
C292
C328
C346
C456
C304-311 111
C334
C342
C353
C316,317
C356
Desti-
Parts No.
K
Address
3A
Z
25WV
CK73HBl
E221
KKJ
E
100PF
0.10UF
CHIPC
10UF
J6.3WV
lOOPF
CHIP
CCONNECTOR
0.022UF
E
29-E
1125-04
INTER
0.010UF
K E40-5717-05
0.33UF
470PF
220PF
1.0UF
CHIP-TAN
10WV
2.2UF
CHlP-TAN
0.047UF
35WV
O.22UF
68PF
33PF
4700PF
68UF
1000PF
CK73GBl
Hl
02K
H221
63WV
22UF
3.3UF
CHIP-T
AN
010VVV
10PF
CK73FBl
El
04K
CC73HCH1El01J
ClO4K
H221
C92-0566-05
CC73GCHl
Hl01J
Now
CK73GB1Hl03K
E223K
FLAT
E40-57l9-05
E40-5660-05
CABlE
CONNECTOR
CK73FFl
C334Z
H221J
K2,M2
E47l
E22l
C92-0519-05
C92-05l4-05
C473K
03K
C92-0002-05
CK73GB1Hl02K
E680J
CC73HCHl
E330J
H472K
C92-0546-05
Hl
01
Hl02K
K2.M2
K.M,T
C92-0543-05
C92-0012-05
Cl
04K
E472K
Cl
04KTD
000
CK73FB1Al05K
K,M,T
Description
CHIPC
""rts
nation
Desti-
CN201
CNl
CN202
35
TK-250
PARTS LIST
TX-RX UNIT (X57-444X-XX)
Parts No. *
12.8MHz
VCXO
L40-1005-34
L77-1563-15
TCXO
KMK2M2
RESONATOR
RESONATOR358MHz
L40-1015-48
L78-0336-05
L78-0332-15
L78-0331-05
RESONATOR
4.19MHz
12MHz
45.505MHz
SMALL
FERRITETIP
L92-0136-05
L92-0137-05
L40-4772-37
L40-1095-48
L40-1005-48
FIXED
INDUCTOR
47nH
1.0UH
COIL
L34-4335-05
L33-0765-05
L40-2205-34
22UH
150MHz
L34-4336-05
L33-0763-05
RK73GB1J330J
L40-1081-37
L40-2781-37
010UH
0.27UH
12UH
10UH
220K
KMK2M2
CHIP
RK73GB1J244J
L40-1
L40-1095-34
R
001-37
0.1
OUH
3A
J21-4458-14
FUSE
PIN
FLAT
OC
PHONE
HARDWARE
JACK
F53-0104-05
E40-5657-05
E40-5614-05
E40-5662-05
E40-5718-05
Ell-0457-05
CONNECTOR
E03-0
CABLE
JACK
170-05
CONNECTOR
FIXTURE
LCD
L72-0922-05
L72-0927-05
L40-6881-37
L71-0461-05
T
L40-3981-37
L40-5681-37
T
TUNING
COIL
CERAMIC
455kHz
KMK2M2
E
L77-1583-15
L77-1438-15
K2M2T
100UH
K2,M2
CRYSTAL
45.050MHz
L71-04D9-15
FILTER
49.8nH
K2,M2
KMTE
21.6nH
216nH
33
lOOK
RK73GB1Jl04J
JAddress
1/16W
240K
L40-1281-37
SHIELOING
E40-5661-05
CASE
RK73GB1J224J
0.56UH
0.39UH
0.68UH
New
L79-1065-05
L72-0906-05
T.E
K,M,E
K,M,E
T.E
4A/125V
Description
parts
Ref_ No.
R44
042700
R35
R43
R42
R37
R36
R32
R34
R38
R31
R30
043100
R29
R12 -40
R6
R41
R36
R31
Rl1
R28
04
nation
R56
R54
R47
R43
R17
R41
R58
R55
R53
R46
R49
R48
R7
R30
Rl1
R27
R28
R26
R25
R14
R16
R21
R20
R19
R22 ,9
R8
Rl0
Parts No.
2.2K
150K
RK73GB1J222J
RK73GB1Jl04J
12K
R92-1218-05
47K
1.0K
RK73GB1J820J
KMTE
RK73GB1J332J
56K
33
OK
E.E New
RK73GB1J562J
RK73GB1J682J
RK73GB1J330J
RK73GB1J220J
47
680
22K
lBO
220K
120K
10K T
KMK2M2
RK73GB1J561J
RK73GB1J470J
RK73GB1Jl01J
RK73GB1J333J
RK73GB1J224J
RK73GB1J681J
RK73GB1J223J
RK73GB1Jl03J
J 102J
680K
820
180K
2.7K
RK73GB1J684J
220
RK73HB1J221J
RK73GB1J221J
JAddress
1/16W
CHIPRK73GB1J154J
R nation
lOOK
0.1
l/2W
RK73GBl
J123J
82
18
RK73GB1Jl02J
RK73GB1J473J
RK73GB1J271J
RK73GB1J180J
270
33K
1/l6W
68K
22
K2,M2
RK73GB1J472J
560
10
100
RK73GB1Jl00J
RK73GB1J181J
RK73GB1J124J
330
T.E
RK73GB1J331J
RK73GB1J184J
RK73GB1J272J
RK73GB1J821J
Description
K,M,E
Desti-
(
Desti-
parts
R36
R37
R57
R50
R45
R35
R24
R18 -52
(
(
(
36
TK-250
PARTS liST
TX-RX UNIT (X57-444X-XX)
Parts
No.
47
680K
RK73GB1J684J
R
820K
RK73GB1J824J
15K
RK73GB1J152J
470K
2.2K
RK73GB1J222J
RK73GB1J474J
UK
OOHM
10
R92-0670-05
150K
27K
K2M2TE
RK73GB1J181
RK73GB1J154J
RK73GB1J273J
1/10W
33
68K
180
22
150
E
K
KMK2M2
MK2M2
RK73FB2A181J
RK73GB1J151J
RK73GB1J683J
47K
120K
220K
RK73GB1J124J
RK73GB1Jl02J
RK73GB1J473J
R DescriptionJ
12K
lOOK
10K
1.OK
18K
RK73GB1J123J
RK73GB1J183J
56K
1/16W
22K
470
RK73GB1J153J
RK73GB1J223J
2,M2
,M,TNew
K,M,T
.E
RK73GB1J473J
RK73GB1J224J
K,M
RK73GB1J330J
RK73GB1J220J
1/16W
RK73GB1J470J
JAdrlress
o100
OHM
T
,E
CHIPRK73GB1Jl04J
R92-1252-05
RK73GB1Jl01J
RK73GB1Jl00J
RK73GB1Jl04J
RK73GB1Jl03J
RK73GB1J471J
RK73GB1J563J
nation
Ref. No.
R271
R274
053300
R266
R259
R257
R263
R251
R250
R252
R254-256
R305-309
R311
R312
R304
R299-302
R298
R294-296
R282
R293
R283
R278
R275
R272
R270
R269
R266
R265
R249
R250
R248
R258
R252,253
R263
R261
R263
R304-309
R281
R280
R276,277
R294-296
R299-:j02
R247
R253
R297
R284-292
R268
R250
R260
R310
R303
R279
R273
R264
parts
Parts No.
JAddress
1/16W
47K
lOOK
100
E
4.7K
RK73HB1J472J
OK
RK73GB1J473J
RK73HB1Jl01J
o470K
OHM
R92-1368-05
RK73HB1J101J
33
68K
RK73HB1Jl
RK73HB1J473J
R92-1252-05
01
RK73GB1J474J
RK73GB1Jl01J
KMK2M2
CHIPRK73GB1Jl03J
RK73GB1J330J
RK73GB1J823J
RK73GB1J683J
R Description
10K
820K
22K
15K
150K
RK73GB1Jl04J
82K
27K
K2,M2
OOHM
RK73HB1J330J
RK73GBl
K,M,T
01JJ
T
.E ENew
RK73GB1J822J
RK73GB1J824J
RK73GB1J153J
RK73GB1J223J
RK73GB1J154J
RK73GB1J273J
nationJ 102J
Desti-
K,M,T
J 1/16W
K2,M2
parts
Desti-
R267
37
TK-250
PARTS LIST
TX-RX UNIT (X57-444X-XX)
Palts No.
E
MICROPHONE
ELEMENT
OK
VARI-CAP
DIODE
470K
JK
1/16W
10
CHIPR
RK73GB1Jl00J
73J
2.2K
RK73GB1J222J
RK73GB1J473J
RK73GB1Jl03J
4.7K
15K
39K
0.39
lOOK
100
CHIP
RK73GB1Jl
R92-1368-05
RK73HB1Jl01J
RK73HB1J104J
RK73GB1J393J
RK73EB2ER39K
RK73GB1J153J
RK73GB1
R F20
J153J
01 J
20K
o33K
10K
OHM
T91-0547-05
RK73GB1J203J
RK73GB1J333J
RK73GB1J101J
47K
560
K,M,T
RK73GB1J561J
RK73GB1J472J
RK73GB1Jl04J
RK73GB1J102J
470
22K
1.0K
RK73GB1Jl02J
RK73GB1J474J
RK73GB1J471J
1SS368
HVU350
Dl
RK73HB1Jl04J
EAdm-ess
27K
820K
270
ENew
R92-1252-05
R92-0670-05
RK73GB1J273J
RK73GB1J824J
RK73GB1J223J
RK73GB1JlOOJ
RK73GB1J271J
DIODE
lSS312
MI809
1/4W
RK73HBl
J4
72J
2,M2
RK73HB1J103J
RK73HB1J473J
RK73GB1J103J
RK73GBI
J223J
Description
nation
parls
Ref. No_
IC223
ICI
IC20S
IC207
IC451
IC5
0202,203
018
010
IC201
lcm
38
Desti07
016
IC222
IC221
IC206
IC215
IC5
IC212
IC4
IC209
02
IC452
0202-204
05
09
010
011
013
012
014
017
018
IC220
IC218
IC217
IC205
IC202
IC216
IC213
IC3
03
04
08
IC203.204
IC223
IC2
01
010
015
IC219
IC207
IC214
IC21O,211
06
New
Palts
TC75W51 FU
No. *FETDTA114YE
KMTE
E
TA75WOl
FU
K,M,T
TA7368F
78312AGF3553BE
TC35305F
PCD3312CT
TC7S04FU
TC7S66FU
M62363FP
NJU7201
U50
TC7S32FU
XRU4094BCFV
M67755LA
BU4094BCFV
M677
55HA
HN58C257T-20
NJM
1458M
TA75W01FU
TC74VHC573FS
MB1512PFV-GBND
DTC144EE
DTA114EE
MC33172D
MC3372V
TA75W558FU
DIODE
S-8054ALB-LM
HSM88AS
DA221
75308BGK739BE9
TRANSISTORKMK2M2
DIGITAL
DTAl14YE
2SC5090
TRANSISTOR
SGM2014M
DIGIT
AL
TRANSISTOR
IC(OP
ICIOP
AM
PMICROPROCESSORI
X2)
X21
K2,M2
IC(AF
POWER
AMP)
IC116/8bit
IC(128X8bit
C(DTMF/MODEM/MUSICEL
IC(DTMF
ICI128X8bit
XL24C01AF
BR24COl
RECEIVER)
EEPROMI
EEPROM)
AF
TON EI
IC(INVERTERj065200
IC(ANALOG
0/
A
CONVERTERI
SWITCH)
AMP
ICI8bit
SHIFT/STORE
REGISTERI
IC(POWER
MODULE/135-174MHz6WJ)
REGISTER)
ICIPOWER
MODULE/150-174MHz6WJ)
ICI32768X8bit
EEPROM)
IC(8bit
0
TYPE
LATCHI
IC(PLL
FREOUENCY
SYNTHESIZER)
IC(VOLTAGE
ICIVOLTAGE
DTA123EE
DETECTOR)
REGULATOR)
ICI4bit
MICROPROCESSORI
2SJ243
2SC46171S1
2SC4617(SI
DTC
143EE
TRANSISTORT,E
2SA
2SC42151YI
1832(GRI
2SC5066101
K,M.T
2SBI119(S)
2SK1215{E)
REGULATORI
ICI21NPUT
OR
GATE)
ICIFM
IF}
Description
2SK208101
2SB1119(SI
2SC42261R24)
nation
parls
Adm-ess
Desti-
TK-250
PARTS LIST
Parts No.
*
OK
CC73HCHl
RK73HB1Jl03J
RK73HBl
J822J
E220J
39PF
L40-1S81-37
E470J
lSUH
20PF
S6K
CHIP
RK73HB1JS63J
R
X58-4290-50
K
Address
L40-1081-37
L33-0750-05
E330J
L33-1266-0S
14.7nH
0
L33-0750-0S
EOl
OC
FETDTC
L40-3391-37
6.3WV
TRIM
DIGITAL
PIN
2SK1588
C05-0380-15
E23-0983-0S
TERMINAL
CAP
TRANSISTOR
10P
X58-4130-11
CHIPC
THERMISTOR
TN103S472JT
157-302-53008
E
JC
1/16W
22PF
10K
82K
RK73HB1J472J
47PF
E390J
5.0PF
1/16W
270K
CK73HBl
RK73HB1J274J
C
Cl
EOZOC
03K
50PF
1000PF
33PF
SMALL
DTC
CK73H81
FIXED
El02K
INDUCTOR
E050C
017nH
10UH
10PF
1.0PF
E1000
FET2SK1824
El
02K
3.3UH
33UF
SHIELDING
FETDTA144EE
CHIP-TAN
C92-0513-05
144EE
PLATE
0.010UF
TRANSISTOR
K X58-4130-10
DTC144EE
CK73HB1
E102K
PLL
SUB
FET
UNIT
T.E
K.M
K2,M2
K,M
K2,M2I/ow
2SC46171S1
K,M
2SJ243
K2.M2
K2,M2
DIGIT
2SC4215{YI
AL
1586IY,GR)
2SK879(Y)
K,M
Description
2SA
13621GRI
nation
part, Ref.
No.
RS12
CS17
0504
R508
DSOS
RS11
RS02
R503
RS04
C502
C505
CS07
C5l2
CS13
CS18
CS1S
0502
0501
R51S.516
OS02
R50S.S06
L505
L504
C506
TCS01.S02
CS14
L503
L502
0504,SOS
RS1S.516
OSOl
CS09.51O
0502.503
OS03.504
R510
LSOS
0501
C515
C516
0503
0501-504
RS07
RSOl
RS03
CS08
S11
0505
L501
CNSOl-5OE
LS04
LS03
C514
Parts No.
*VARI-CAP
CHIP
RK73H81
R
JEl02K
184J
RK73H81J332J
Address
L33-1287-05
0
E102K
33UF
1000PF
L40-2291-37
MA360
2SC5090
1SV228
330
RK73H81J331J
270
RK73H81J271J
8.2K
RK73H81J822J
JC
47
1/16W
180K
VAR
DIGITAL
2SJ243
RK73H81J470J
HVU3S0
UMC4
I-CAP
TRANSISTOR
DIODE
OK
RK73H81J472J
33K
390
47K
4.7K
270K
lOOK
TRANSISTOR
FET
RK73H81J473J
RK73H81J391J
RK73H81J274J
RK73H81Jl04J
L40-6872-37
L33-0745-05
68nH
33nH
56nH
OSPF
CK73H81Cl03K
EOR5C
30PF
50PF
7.0PF
E070D
90PF
10PF
CC73HCHl
CCAP
E090D
EOl
OC
ElINDUCTOR
02K
K
6.3WV
0.010UF
lSPF
CHIP-TAN
CHIPC
K
CK73H81
C92-0S13-0S
Cl
E150J
03K
SMALL
TRIM
FIXED
10P
2.2UH
PIN
SHIELDING
L40-3391-37
TERMINAL
PLATE
33UH
V
ARI-CAP
UMG2
1T363A
DTC144EE
K,M New
2SKS08NV(KS21
E030C
EOSOC
C05-0384-05
K2,M2
2SC42261R24)
2SCS066101
Description
E23-0983-05
nation
part,
Desti-
TX-RX UNIT (X57-444X-XX)
veo UNIT (X58-4130-10)
veo UNIT (X58-4290-50)
Desti-
VCO UNIT (X58-4290-50)
C501Fl0-2116-14
39
TK-250
EXPLODED VIEW
A
OPTION KOM-?
A
B
D
E
F
H
J
K
L
M2.6x3.5(BLK)
M2x3.5
NUT
NUT
NUT
M2x2.0
M2x8.0
M2x5
M2x4(F-Tap)
:N09-1492-05
:N09-2053-05
:N14-0545-04
:N14-0560-04
:N14-0562-04
:N39-2020-46
:N?8-2080-46
: N09-2251-05
:N88-2004-46
34
2
\
EN1 VR\
~.
\
59/
\
<I
~
·~701
\~~.
~.
X5?-444 (C/3)
DISPLAY UNIT
III~
67
Dil
69
D
~
1
~~
54
F'-;;..o
'$ -
;f~
~~~k~
~J$~ ~~~-LCD11
\
~~"
~
~~.
~
V \J~\ \ \
E
56
7
35
116
cs
58
i
'h
26
68
Parts with the exploded
40
Hx2
numbers larger than 700 are not supplied.
TK-250
EXPLODED VIEW
C
B
C
G
M
M2x3.5
:N09-2053-05
M2.6x8
:N09-2185-05
WASHER
:N17-1026-60
SCREW SET :N99-0387-05
OPTION
KOM·?
ACCESSORY
ACCESSORY
61
15
~
/1,:<
11
~
701
~50
~,~
~
Mx2
ACCESSORY
Parts with the exploded numbers larger than 700 are not supplied.
41
TK-250
PACKING
38
39 Protection
Bag
(H25-0085-04)
100x200
50
:(T90-0450-05)
:(T90-0381-05)
39 Protection
Bag
(H25-0085-04)
100x200
/'\/7t"
/},~
~~.
~
36 Item Carton
Case
(H52-0560-04 )
37 Packing Fixture
(H12-1470-02)
13 Warranty Card(K,K2)
(846-0409-40)
/
14 Instruction
Manual
(B62-0446-00)
42
TK-250
~
~
TERMINAL FUNCTION
TX-RX UNIT(X57-4440-10) (A/3) : TX-RX section
1
II input
PC
DE
TR
SV
Pin
No.
B
110
PE
KY
UL
MD
E
CK
PB
BL
OT
Pin
Name
ainput
GND
Function
SB
AF
Normally
PLL
modulation
clock
data
:line
data
input
Transmit
signal
input
: switch
(TX)
Power
input
after
power
APC
power
5V,
control
input
OV
AF
Power
Normally
detection
output
:OV,
5V,
signal
after
Transmit
passing
output
:5V
(TX)
OV
(RX)
through
the input
fuse (TX)
enable
data
(Low
Speed
Data)
Connector
No.
1
TX-RX UNIT(X57-4440-10) (A/3) : TX-RX section
Pin
No.
110Pin
I +B
1 Name
Function
Extemal power
supply
input
Connector No.
TX-RX UNIT(X57-4440-10) (B/3) : Control section
GND
-I TR
1 Name
BL
DE
SV
E
B
SB
PB
PE
OT
KY
UL
MD
CK
PC
Pin
Pin
No.
110
asignal
Function
AF
signal
input
(RX)
Normally
::line
5V,
Transmit
::OV
Normally
5V,
Transmit
OV
Power
APC
PLLdetection
Power
modulation
enable
data
clock
power
input
output
OV,
data
after
data
control
output
after
Save
output
output
passing
power
input
mode:
output
through
(TX)
switch
5V
(TX) the
fuse
AF
(Low
Speed
Data)
output (TX)
Connector No.
TX-RX UNIT(X57-4440-10) (B/3) : Control section
GND
-I MaN
PTT
E
1 Name
110Transmit
LMP
Pin
Pin
No.
Function
Normally
5V,
when
connected
GND.
Monitor
when
connected
GND.
Normally: :No.
Lamp
when
connected
GND.
Connector
43
TK-250
TERMINAL FUNCTION
TX-RX UNIT(X57-4440-10) (B/3) : Contra! section
GND
-I TXAI
21data
3
1/0
Pininput
No.
EN2
E
R
XAI
T/R
SB
Pin
Name
0Transmit
OT/DO
RXAO
CT/D1
TXAO
Power
Scrambler
output
enable
switch
TX
RX
AF
AF
signal
input
input
TX
Binary
Normally
RX
AF
AFsignal
signal
code
signal
: 5V
select
output
,after
2power
1 tor
scrambler
:Function
OV
Connector No.
TX-RX UNIT(X57-4440-10) (B/3) : Contra! section
1 Name
DKEY1
DKEY2
DKEY4
DTMF KEY 1/0Pin
I DKEY7
Pin Function
No.
DKEY3
DKEY5
DKEY6
DKEY8
Connector No.
TX-RX UNIT(X57-4440-10) (B/3) : Contra! section
GND
B
5M
1
AE
E
RT
RD
1/0
5V
0-I A2
Al
TD
SB
Pin
Name
Pinswitch
Function
No.
Reset
Serial
Power
control
signal
input
after
input
signal
power
input
Serial
Power
AF
signal
control
output
output
signal
after
tor
passing
output
volume
through the tuse
AF
signal
input
after
volume
Connector No.
TX-RX UNIT(X57-444
0-1 0) (B/3) : Contra! section
GND
E1 Name
1/0Pin
Pin Function
No.
0- SP
Output tor intemal
speaker
Connector No.
44
~
TK-250
TERMINAL FUNCTION
TX-RX UNIT(X57-4440-10) (C/3) : Display section
GND
-I TXD
RXD
5V
5M
E
1/0
Pin
Pin Function
No.
RST
EC2
EC1
1 Name
Se
rial control
signal
input
Reset
Encoder
signal
data
output
input
Encoder
data
input
Serial
control
Connector
No. signal output
0
vce
UNIT(X58-4130-10)
1/0Transmit
LV
Pin
I input
MOD
1Name
Pin
No.
T/R
Function
Normally
: 5V,
: OV
PLL
loek voltaqe
(O-5V)
(TX)
AF
modulation
signal
input
Connector No.
1
vce GND
UNIT(X58-4130-10)
1
0
-I OUT
5V
EName
Pin Function
No.
5V
VCO output 1/0Pin
Connector No.
45
TK-250
ADJUSTMENT
REQUIRED TEST EQUIPMENT
1. Stabilized
•
Power Supply
The indicated
SSG output
maximum
output.
levels
are tor
TK-250
1) The supply voltage can be changed
between 5V and 18V, and the current
(lYPE 1)
K,M,2)K2,
T, EM2
3A or more. (lYPE
2) The standard voltage is 7.5\;.
136-150MHz
150-174MHz
45.05MHzFrequency
Remark
IF1
IF1
Version
range
45.505MHz
LOC
IS
2. DC Ammeter
1) Class 1 ammeter (17 ranges and other
features)
2) The full scale can be set to either 300mA
or 3A.
3) A cable of less internal loss must be
used.
3. Frequency
1)
2)
Counter
(f. counter)
Panel side view
Frequencies
of up to 1 GHZ or sa can be
measured.
The sensitivity
can be changed to 250MHz
or below, and measurements
are highly
stabie and accurate (0.2 ppm or sa).
4. Power
Meter
'Óq-Ch
1) Measurable frequency:
Up to 520MHz
2) Impedance:
50Q, unbalanced
3) Measuring range: Full scal of 10W or so
4) A standard cable (5D2W 1m) must be
used.
5. RF VTVM
1)
LED~~
(Red) I SCN
f=
(RF V.M)
Measurable
sa
frequency:
Up to 520MHz
or
6. Linear Detector
1)
2)
Measurable
frequency:
Up to 520MHz
Characteristics
are flat, and CN is 60dB
more.
7. Digital
or
Left and Right side view
Voltmeter
1) Voltage range: FS = 18V or so
2) Input resistance:
1MQ or more
8. Oscilloscope
1)
2)
Measuring
range: DC to 30MHz
Provides highly accurate measurements
5 to 25MHz.
9. AF Voltmeter
1)
2)
1)
Analyzer
Measuring
11. Standard
range:
Signal
DC to 1GHz or more
Generator
(SSG)
1) Maximum frequency:
520MHz or more
2) Output: -20dB/O.1IlV
to 120dB/1V
3) Output impedance:
50Q
12. Tracking
Generator
1) Center frequency:
50kHz to 520MHz
2) Frequency deviation: ±35MHz
3) Output voltage: 100mVar
more
13. Dummy
•
•
46
I
!'~ ~) i
(AF VTVM)
Measurable frequency:
50Hz to 1MHz
Maximum sensitivity:
1mV or more
10. Spectrum
I
for
Load
1) 8Q, 3W or more
Use a non-conductive
rad such as a
Bakelite
rad for adjustment
(especially
ot
trimmers
and coiis) .
To protect the SSG, do not send out
signals while adjusting
the receiving
unit.
Ift-m
[@Jo!!
j-\
MONITOR
LAMP
DC-IN
~Ofr-Powe</VDL
LO
DIA TA
TK-250
ADJUSTMENT
Adjustment points
TX-RX UNIT (X57-4440-10) (A/3)
Component side view
L6
[:::]
OTP
~D
a:
(RF)
1+ CB1 1
Tuning mode
Frequency table for using tuning mode
149.970MHz
143.100MHz
RX
frequencyI I
TX 162.000MHz
frequency
162.100MHz
162.200MHz
162AOOMHz
149
173.990MHz
150.000MHz
150.100MHz
173.970MHz
149.990MHz
136.000MHz 149.000MHz
162.000MHz
143.000MHz
149.200MHz
TX
RX frequency
frequency
K2,AOOMHz
M2 (TYPE 2)
K, M ,T, E(TYPE 1)
~
Signaling No. list
~ignaling
DTMF
DTMF
NONE
DOT
OT TONE
2TONE
OT
DOT
NONE
NONE
DEC TONE
100Hz NONE
square
wave
ENC
1
47
TK-250
ADJUSTMENT
vco
Unit
M
ethod
DV.M
fRL
fRH
Terminal
TC501
Parts
VCO
LV
VCO
fTH ::1)
±O.05V
Condition
3.5V(TYPE
1)
Adjustment
3.5V(TYPE
with
freq'
1)
CH
Channel
lowest
freq'
1) fTL
CH
Channel
with highest
highest
freq'
Test-
ck
Remarks
Specifications/
TC502 3.0V(TYPE 2)
Measurement
O,7-1.7V
O.6-1.7V
2. TX loek
3.
4. RX loek
Helical
WAVE
shift
to
TX-RX
Unit
M
ethod
L9
ANT
TX-RX
fRM
TP4
L12
Terminal
Parts
L10
Condition
Trk.
Gen.
Adjust
wave
to right
figure
below.
(N3)
Adjustment
Spectrum
Conneet
(RF)
the
spectrum
analyzer
(N3)
Analyzer
1)
CH
:form
Channel
with atcenter
freq'
Test-
Remarks
Specifications/
L17
Measurement
Check
WAVE shift to left
3) CH : Channel with lowest
CAUTION :
Wh en using an extern al power connector, please use wi1h maximum fin al module protection of 9V.
~
48
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V1~M
'A
V11-L
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CENTER
SPAN
MARKER
4MKR
TG LEVEL
162.00MHz
50MHz
146MHz
20.64MHz
-5dBm