Kenwood TK-285 User manual

Document Copyrights
Copyright 2006 by Kenwood Corporation. All rights reserved.
No part of this manual may be reproduced, translated, distributed, or transmitted in any
form or by any means, electronic, mechanical, photocopying, recording, or otherwise, for
any purpose without the prior written permission of Kenwood.
Disclaimer
While every precaution has been taken in the preparation of this manual, Kenwood
assumes no responsibility for errors or omissions. Neither is any liability assumed for
damages resulting from the use of the information contained herein. Kenwood reserves
the right to make changes to any products herein at any time for improvement purposes.

VHF FM TRANSCEIVER
TK-285/(N)
©2000-6 PRINTED IN JAPAN
B51-8530-00(S) 847
SERVICEMANUAL
GENERAL ................................................................................. 2
SYSTEM SET-UP ..................................................................... 2
OPERATING FEATURES......................................................... 3
REALIGNMENT ........................................................................ 4
CIRCUIT DESCRIPTION .......................................................... 6
SEMICONDUCTOR DATA ..................................................... 11
DESCRIPTION OF COMPONENTS....................................... 13
PARTS LIST............................................................................ 14
EXPLODED VIEW .................................................................. 22
PACKING ................................................................................ 23
ADJUSTMENT........................................................................ 24
TERMINAL FUNCTION .......................................................... 32
PC BOARD VIEWS
DISPLAY UNIT (X54-3210-13) ............................................ 33
TX-RX UNIT (X57-619X-XX) ............................................... 39
SCHEMATIC DIAGRAM ......................................................... 45
BLOCK DIAGRAM .................................................................. 49
LEVEL DIAGRAM ................................................................... 51
OPTIONS ................................................................................ 52
SPECIFICATIONS ...............................................BACK COVER
CONTENTS
CAUTION
When using an external power connector, please use
with maximum final module protection of 9V.
Photo is K type
Knob (ENC)
(K29-5232-03)
Knob (VOL)
(K29-5231-03)
Cabinet assy
(A02-2055-53)
(16 keys)
Badge
(B43-1106-14)
Packing
(G53-0896-02)
(16 keys)
Panel assy
(A62-0535-04)
Helical antenna
(T90-0733-05):K, E
(T90-0734-05):(N)M
Knob (PTT etc)
(K29-5157-03)

TK-285/(N)
2
GENERAL / SYSTEM SET-UP
Unit
Model & TX-RX unit Display unit Frequency range Remarks Charger Battery
destination KX57-6190-11 RX : 217~250MHz IF1 : 44.85MHz OP
TK-285 EX54-3210-13 TX : 218~250MHz LOC : 44.395MHz OP ✔
(N)M X57-6190-21 240~270MHz
Merchandise received
Choose the type of transceiver
Transceiver programming
Delivery
Are you using the speaker microphone?
TX 218~250
RX 217~250 5.0W TK-285 K,E
TX/RX 240~270 5.0W TK-285 (N)M
Frequency range (MHz) RF power Type
A personal computer (IBM PC or compatible), programming
interface (KPG-36), and programming software (KPG-62D)
are required for programming.
(The frequency, conventional system features, TX power HI/LOW,
and signalling data are programmed for the transceiver.)
YES
NO
KMC-25
Speaker microphone
(Option)
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 data. Changes
which may occur after publication are covered by either Service
Bulletins or Manual Revisions. These are issued as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment information,
the full part identification number should be included. This
applies to all parts : components, kits, or chassis. If the part
number is not known, include the chassis or kit number of which
it is a part, and a sufficient description of the required
component for proper identification.
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.
OP

TK-285/(N)
3
OPERATING FEATURES
1. Operation Features
The TK-285 is a VHF FM Radio designed in both Trunking
Mode and Conventional Mode.
2. Transceiver Controls and Indicators
2-1. Physical Layout
2-2. Panel controls
The key on the top and front panel is momentary-type push
buttons. The functions of these keys and knob are explained
below.
1Antenna connector
Connect the antenna here.
2Rotary encoder
3POWER switch/ VOLUME control
Turn clockwise to switch ON the transceiver. Rotate to
adjust the volume. Turn conterclockwise fully to switch OFF
the transceiver.
4Auxiliary (orange) key
5Battery pack release latch
Pull back on this latch to release the battery pack.
6Call key
7PTT (Push-To-Talk) switch
8Clear key
9Transmit/ Receive indicator
0A key
-B key
=2C key
~D 3key
!DTMF keypad
@Universal connector
Connect the (optional KMC-25) speaker/ microphone here.
Otherwise, keep the supplied cover in place.
2-3.Keyfunctions
Trunking mode
2Rotary encoder
Rotate this encoder to select your desired call address
(voice calls) ot status (status calls).
4Auxiliary (orange) key (default setting: None)
Press to activate its auxiliary function.
6Call key
Press to call the displayed call address.
7PTT (Push-To-Talk) switch
Press to transmit. Also press to initiate a call if “PTT to
Initiate Call” has been programmed.
8Clear key
Press to end the current call.
9Transmit indicator
Lights red while transmitting.
0A key (default setting: Status/ Stack)
Press to activate its auxiliary function.
-B key (default setting: Redial)
Press to activate its auxiliary function.
=2C key (default setting: None)
Press to activate its auxiliary function. Also press to scroll
left while viewing stack entries.
~D 3key (default setting: None)
Press to activate its auxiliary function. Also press to scroll
right while viewing stack entries.
!DTMF keypad
Press to input a call address or dialing function.
Conventional mode
2Rotary encoder
Rotate this encoder to select your desired channel.
6Call key
Press to turn the monitor function ON in order to monitor
your selected channel.
7PTT (Push-To-Talk) switch
Press this switch, then speak into the microphone to call a
station.
8Clear key
Press to return to Trunking mode.
9Transmit/ Receive indicator
Lights green while receiving a signal. Lights red while
transmitting.
0A key
Press to turn Scan ON (or OFF).
-B key
Press to add/delete channel(s) to/from Scan list.
~D 3key
Press to turn the display and keypad backlight ON.
The backlight remains ON for 5 seconds.
eqw
r
t
o
!5
!0
!4
i
u
y
!1
!2
!3
SpeakerMicrophone

TK-285/(N)
4
5. PC Mode
5-1. Preface
The TK-285 transceiver is programmed by using a personal
computer, programming interface (KPG-36) and programming
software (KPG-62D).
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-285 to the personal computer with the
interface cable.
2. When the POWER switch on, user mode can be entered
immediately. When PC sends command the radio enter PC
mode, and “PROGRAM” is displayed on the LCD.
When data transmitting from transceiver, the red LED is
blinking.
When data receiving to transceiver, the green LED is blinking.
Notes:
• The data stored in the personal computer must match model
type, when it is written into the flash memory.
• Change the TK-285 to PC mode, then attach the interface
cable.
REALIGNMENT
1. Modes
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 program- Used to read and write frequency data
ming 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.
User mode
Panel test mode
PC mode
Firmware
programming mode
Panel tuning mode
PC test mode
Data programming
mode
PC tuning mode
3. Panel Test Mode
Setting method refer to ADJUSTMENT.
4. Panel Tuning Mode
Setting method refer to ADJUSTMENT.
2. How to Enter Each Mode
Mode Operation
User mode Power ON
Panel test mode [B]+Power ON
PC mode ReceivedcommandsfromPC
Panel tuning mode [Panel test mode]+[A]
Firmware programming mode [A]+Power ON
OPERATING FEATURES / REALIGNMENT
2-4.Display
1Subdisplay
displays the strength of received signals.
2Programming indicator
P appears while in AUX A or Scrambler is being activated.
3MON (Monitor) indicator
MON appears while you are monitoring a channel by pressing
the Call key. (Conventional Mode only)
4SVC (Service) indicator
SVC appears when a control channel is found. It flashes
while the transceiver is searching for a control channel.
5SCN (Scan) indicator
SCN appears while you are scanning. (Conventional Mode
only)
6LO indicator
This icon blinks while in battery warning, if “Always” or
“Always W/beep” is selected in the battery warning settings.
7Handset indicator
flashes when you activate call diversion.
8MAIL indicator
appears while there is data in the stack. It flashes when
there is new data in the stack.
9Alphanumeric display
displays call addresses, the call
duration timer, data messages, and the current operating
status of the transceiver.
SVC
MON SCN LO
12345
9
678

TK-285/(N)
5
REALIGNMENT
5-3. KPG-36 description
(PC programming interface cable: Option)
The KPG-36 is required to interface the TK-285 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-36 connects the universal connector of the TK-
285 to the computers RS-232C serial port.
5-4. Programming software KPG-62D Description
The KPG-62D is the programming software for the
transceiver supplied on three 3.5" floppy disks. This software
runs under MS-Windows 95/98 on an IBM-PC or compatible
machine.
The data can be input to or read from the trnsceiver and
edited on the screen. The programmed or edited data can be
printed out. It is also possible to tune the transceiver.
We recommend that install the KPG-62D for example to
hard disk first then use it.
5-5. Programming with IBM PC
If data is transferred to the transceiver from an IBM PC with
the KPG-62D, 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.
KPG-62D instruction manual parts No. : B62-1354-XX
6-3. Programming
1. Start up the firmware programming software (Fpro.exe).
2. Set the communications speed (normally, 57600 bps) and
communications port in the configuration item.
3. Set the firmware to be updated by File name item.
4. Turn the TK-285 power ON with the [A] switch held down.
Hold the switch down until the display changes to "PROG
57600". When "PROG 57600" appears, release your finger
from the switch.
5.
Check the connection between the TK-285 and the personal
computer, and make sure that the TK-285 Is in the Program mode.
6. Press write button in the window. A window opens on the
display to indicate progress of writing. When the TK-285
starts to receive data. the [P] icon is blinking.
7. If writing ends successfully. the LED on the TK-285 lights
and the checksum is displayed.
8. If you want to continue programming other TK-285 s, 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-
62D).
●When programming the firmware, it is recommend to copy
the data from the floppy disk to your hard disk before update
the radio firmware.
Directry 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 [Call] switch (top of left side) while "PROG
57600" is displayed, the version is displayed. If you press
the [Call] switch again while the version is displayed, "PROG
57600" is redisplayed.
2. If you press the [Clear] switch (bottom of left side) while
"PROG 57600" is displayed, the display changes to "PROG
19200" to indicate that the write speed is low speed (19200
bps). If you press the [Clear] switch again while "PROG
19200" is displayed, the display changes to "PROG 38400",
and the write speed becomes the middle-speed mode
(38400 bps). If you press the [Clear] switch again while
"PROG 38400" is displayed, the display returns to "PROG
57600".
3. If you press the [Clear] switch while the version is displayed,
the checksum is displayed. If you press the [Clear] switch
again while the checksum is displayed, the version is
redisplayed.
Note:
Normally, write in the high-speed mode.
KPG-36
IBM-PC
KPG-62D
Fig. 1
6. Firmware Programming Mode
6-1. Preface
Flash memory is mounted on the TK-285. This allows the
TK-285 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-285 to the personal computer (IBM PC or
compatible) with the interface cable (KPG-36). (Connection is
the same as in the PC Mode.)

TK-285/(N)
6
Fig. 2 Receiver section
IC12
MIX, DET, IF SW
Q15
DMDM
IC4 (2/2)
AF AMP
5
DE-
EMP MUTE
EXP
HPF LPF HPF BEF
IC13 21
VOL
IC8
IC7 (2/2)
AF AMP
41
VC1
VC2
Q310
SSW
INT.
SP
EXT.
SP
2nd local
OSC
X2
AF AF
SW
IC300
AF PA
ANT
SW
L40,42,
43
L403,404,
405,406
BPF
D12,14,
D15,401
Q24
RF
AMP
ANT
IC18
1st MIX
Q12
1st IF
L27,29
BEF
L31,33
BPF
XF1
MCF
1st Local
OSC (PLL)
CF2
1. Overview
This transceiver is VHF/FM portable transceiver designed
to operate in the frequency range of 217 to 250MHz (K, E),
240 to 270MHz ((N)M).
2. Circuit Configuration by Frequency
The receiver is a double-conversion superheterodyne with
a first intermediate frequency (IF) of 44.85MHz and a second
IF of 455kHz. Incoming signals from the antenna are mixed
with the local signal from the PLL to produce the first IF of
44.85MHz.
This is then mixed with the 44.395MHz second local
oscillator output to produce the 455kHz second IF. This is
detected to give the demodulated signal.
The transmit signal frequency is generated by the PLL VCO,
and modulated by the signal from the microphone. It is then
amplified and sent to the antenna.
ANT
RX : 217~250MHz (K,E)
RX : 240~270MHz ((N)M)
TX : 218~250MHz (K,E)
TX : 240~270MHz ((N)M)
ANT
SW
RF
AMP
PA
AMP
TX
AMP
1st MIX MCF
44.85MHz
CF
455kHz
FM IF
SYSTEM
AF
AMP SP
44.395MHz
261.85~294.85MHz (K,E)
284.85~314.85MHz ((N)M)
PLL
VCO MIC
AMP MIC
218~250MHz ( K,E )
240~270MHz (
(N)M )
Fig. 1 Frequency configuration
3. Receiver System
3-1. RF unit
An incoming RF signal from the antenna terminal is passed
through the antenna switch (D12, D14, D22 and D401 are off)
andthenthebandpassfilter(L403,404,405,406). The bandpass
filter is adjusted by a variable capacitor. The input voltage to
the variable capacitor is regulated by the voltage output from
the D/A converter (IC8). The signal is amplified by RF amplifier
(Q24), and passed through the bandpass filter (L31,33) and
band-eliminate filter (L27,29) to remove the spurious signal
again. The resulting signal is applied to the first mixer (IC18),
where it is mixed with the first local oscillator signal output
from the frequency synthesizer to produce the first IF
(44.85MHz). The 1st mixer uses the GaAs IC.
3-2. IF unit
The first IF signal is passed through a crystal filter (XF1) to
remove a adjacent channel signal. The filtered first IF signal is
amplified by the first IF amplifier (Q12) and then applied to the
lF system IC (IC12). 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 44.395MHz of second
local oscillator output (crystal unit X2) and produces the second
IF signal of 455kHz.
The second IF signal is passed through the ceramic filter
(CF2) to more remove the adjacent channel signal. The filtered
second IF signal is amplified by the limiting amplifier and
demodulated by the quadrature detector with ceramic
discriminator (CD1). The demodulated signal is routed to the
audio circuit.
CIRCUIT DESCRIPTION

TK-285/(N)
7
CIRCUIT DESCRIPTION
3-3. Audio amplifier circuit
The demodulated signal from IC12 goes through the mute
switch (Q15) and is amplified by IC4 (2/2), high-pass filtered,
low-pass filtered, high-pass filtered, band-eliminate filtered, and
de-emphasized by IC13.
The signal then goes through an AF amplifier IC7 (2/2), an
electronic volume control (IC8), and an AF switch (Q310 is
on), and is routed to audio power amplifier (IC300), where it is
amplified and output to the internal speaker.
The audio mute signal (AM) from the shift register becomes
Low in the standby and Q304, Q305 which are power supply
circuit for IC300 turn off. Also, IC13 is set to the power down
mode according to data from microprocessor, and the AF signal
is muted. When the audio is output, AM becomes High to turn
Q304, Q305 ON, and voltage is supplied to power terminal VP
of IC300. Also, IC13 is canceled out of the power down mode.
The speaker is switched by the logic of speaker switching
terminal SSW on the universal connector. When SP-MIC is
not attached, the logic of SSW becomes High and SW (Q310)
is turned ON, and the AF signal is input to both amplifiers of
IC300.
When SP-MIC is attached, SSW is connected to GND at
inside of SP-MIC. For this reason, Q310 is turned OFF, and
the AF signal is input only to amplifier for EXT SP of IC300.
Change of INT/EXT SP refer to Fig. 3.
AM SSW VC1 VC2 SP
H H H L INT
H L L H EXT
L H L L MUTE
L L L L MUTE
Fig. 3 Audio amplifier circuit
SW
IC300
2
8
AM
AF
SSW
INT.SP
EXT.SP
Q305
Q304
SB
VP 5
VC1
VC2
Q308
Q301
Fig. 5 Squelch and RSSI voltage vs ANT input level
Fig. 4 Squelch circuit
12
DET
BPF
AMP
DET
RSSI NOISE
AMP
IC19
CPU
IF AMP
7
91
93
IC12 : FM IF IC
Q4 D4
SQ close
SQ open
Preset Value
ANT input level
SQ voltage
ANT input level
T
T
T
T
T
RSSI voltage S-Meter level
3-4. Squelch circuit
The output from IC12 enters FM IC again, then passed
through a band-pass filter. The noise component output from
IC12 is amplified by Q4 and rectified by D4 to produce a DC
voltage corresponding to the noise level. The DC voltage is
sent to the analog port of the CPU (IC19). And IC12 outputs a
DC voltage (RSSI) corresponding to the input of the IF amplifier.
The CPU reads the RSSI signal via pin 93.
IC19 determines whether to output sounds from the speaker
by comparing the input voltage of pin 91 and pin 93 with the
preset value.
4. Transmitter System
4-1. Microphone amplifier
The signal from the internal microphone goes through the
mute switch (Q300).
When the SP-MIC is not attached, the microphone switching
terminal (MSW) on the universal connector becomes High, and
mute switch (Q300) is turned ON. When the SP-MIC is
attached, MSW is connected to GND at inside of SP-MIC. For
this reason, Q300 is turned OFF, the internal microphone is
muted, and only the input of the external microphone is supplied
to the microphone amplifier of the TX-RX unit.
The signal from microphone passes through the limitter
circuit in D8, and Mic mute switch (Q17 is off in TX) and through
the low-pass filter (IC25:1/2), the high-pass filter, the ALC
circuit, the low-pass filter, the high-pass filter, and pre-
emphasis/IDC circuit in IC13. When encoding DTMF, mute
switch (Q13) is turned OFF for muting the microphone input
signal.
The signal passes through the D/A converter (IC8) for the
maximum deviation adjustment, and enters the summing
amplifier consisting of IC7 (1/2), and is mixed with the low speed
data from the CPU (IC19) and 9600bps DATA from Optional
Board Terminal.

TK-285/(N)
8
Fig. 8 PLL block diagram
T/R
(TX : Low)
T/R A1
VCO
CV
5
IC14
PLL
8
BUFF
BUFF
LPF
DT,CP,EP
CPU
UL
IC19
VCXO IC1
FC
BAL
Q18
SW
D9 To
drive
amp
Q16
X1
To mixer
SW
MB
D23
18
5. Frequency Synthesizer Unit
5-1. Frequency synthesizer
The frequency synthesizer consists of the VCXO (X1), VCO
(A1), PLL IC(IC14) and buffer amplifiers.
The VCXO generates 16.8MHz. The frequency stability is
1.5ppm within the temperature range of -30 to +60˚C. The
frequency tuning and modulation of the VCXO are done to
apply a voltage to pin 1 of the VCXO. The output of the VCXO
is applied to pin 8 of the PLL IC.
The TK-285’s VCO consists of 2VCO and covers a dual
range of the 261.85~294.85MHz (K,E), 284.85~314.85MHz
((N)M) and the 218~250MHz (K,E), 240~270MHz ((N)M).
The VCO generates 261.85~294.85MHz (K,E),
284.85~314.85MHz ((N)M) for providing to the first local signal
in receive. In TX, the pin 3 of the VCO goes low and the VCO
generates 218~250MHz (K,E), 240~270MHz ((N)M).
The output of the VCO is amplified by the buffer amplifier
(Q16) and routed to the pin 5 of the PLL IC. Also the output of
the VCO is amplified by the buffer amplifier (Q18) and routed
to the next stage according to T/R switch (D9, D23).
The PLL IC consists of a prescaler, fractional divider,
reference divider, phase comparator, charge pump. This PLL
IC is fractional-N type synthesizer and performs in the 40, 50
or 60kHz reference signal which is eighth of the channel step
(6.25kHz). The input signal from the pins 5 and 8 of the PLL IC
is divided down to the 50kHz and compared at phase
comparator. The pulsed output signal of the phase comparator
is applied to the charge pump and transformed into DC signal
in the loop filter (LPF). The DC signal is applied to the pin 1 of
the VCO and locked to keep the VCO frequency constant.
PLL data is output from DT (pin 75). CP (pin 19) and EP
(pin 47) of the microprocessor (IC19). The data are input to
the PLL IC when the channel is changed or when transmission
is changed to reception and vice versa.
CIRCUIT DESCRIPTION
Fig. 6 Microphone amplifier
12 HPF LPF HPF IDC
PRE
EMP
ALC COMP
SW
LIMIT
SW
MIC
Q300 D8
LPF
IC25(1/2)
MIC
EXT.
MIC
Q301
IC13 15 16 18 19
Q13
MUTE DTMF
98
6
D/A
D/A
IC8
IC8 IC1
I5 O5
I1 O1
D/A
IC8
I2 O2
LSD DI9
IC7 (1/2)
SUM
AMP
BUFF
AMP VCXO
VCO
A1
X1
MIC
MUTE
Q17
PTTMSW
The output signal from the summing amplifier passes
through the D/A converter (IC8) again and goes to the VCO
modulation input.
The other output signal from the summing amplifier passes
through the D/A converter (IC8) again for the BAL adjustment,
and the buffer amplifier (IC1 : 2/2), and goes to the VCXO
modulation input.
Fig. 7 Drive and final amplifier and APC circuit
From
T/R SW
(D9)
DRIVE
AMP
RF
POWER AMP LPF
ANT
SW
D12,D401
ANT
VGG
Q20 IC100
VDD
R244
R246
R248
+B
IC23
(1/2)
IC23
(2/2)
REF
VOL
(IC8)
4-2. Drive and Final amplifier
The signal from the T/R switch (D9 is on) is amplified by
drive amplifier (Q20) to 30mW.
The output of the drive amplifier is amplified by the RF power
amplifier (IC100) to 5.0W (1W when the power is low). The RF
power amplifier consists of two stages MOS FET transistor.
The output of the RF power amplifier is then passed through
the harmonic filter (LPF) and antenna switch (D12 and D401
is on) and applied to the antenna terminal.
4-3. APC circuit
The APC circuit always monitors the current flowing through
the RF power amplifier (IC100) and keeps a constant current.
The voltage drop at R244, R246 and R248 is caused by the
current flowing through the RF power amplifier and this voltage
is applied to the differential amplifier (IC23 1/2).
IC23(2/2) compares the output voltage of IC23(1/2) with the
reference voltage from IC8, and the output of IC23(2/2) controls
the VGG of the RF power amplifier to make the both voltages
to same voltage.
The change of power high/low is carried out by the change
of the reference voltage. Q22,23 and 25 are turned on in
transmit and the APC circuit is active.

TK-285/(N)
9
CIRCUIT DESCRIPTION
IC19
IC17
CPU
IC20
EEPROM
FLASH
6-2. Low battery warning
The battery voltage is monitored by the microprocessor
(IC19). When the battery voltage falls below the voltage set by
the Low Battery Warning adjustment, the red LED flashes 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.
6. Control Circuit
The control circuit consists of microprocessor (IC19) and
its peripheral circuits. It controls the TX-RX unit and transfers
data to and from the display unit. IC19 mainly performs the
following;
1) Switching between transmission and reception by 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 decode data input.
6) Transmitting tone and encode data.
6-1. Memory circuit
Memory circuit consists of the CPU (IC19) and a flash
memory (IC17).
A flash memory has a capacity of 2M bits and contains the
transceiver control program for the CPU and the data for
operating features.
This program can be easily downloaded from an external
device.
●Flash Memory
Note : The flash memory stores the data containing the FPU
(KPG-62D) program, Security Number (MPT Serial Number)
and firmware program (User mode, Test mode, Tuning mode,
etc.).
This data must be reinstalled when replacing the flash memory.
●EEPROM
Note : The EEPROM stores tuning data (Deviation, Squelch,
etc.)
Realign the transceiver after replacing the EEPROM.
Low battery warning
The red LED flashes during
transmission
The red LED flashes and
continuous beep sounds
while PTT pressed
Battery condition
The battery voltage is low but
the transceiver is still usable.
The battery voltage is low and
the transceiver is not usable
to make calls.
6-3. Key input
If the clock is supplied to CLK terminal when the RES
terminal (CPU pin 78) of the decade counter (IC301) is set to
Low, Q0 to Q7 become High sequentially. Normally, KI1 and
KI2 are Low (pulled down). When any key is pressed. KI1 or
KI2 become High. The CPU detects which key is pressed,
according to the voltage of KI1 and Kl2 and clock timing.
Fig. 10 Key input
IC19
CPU
Q5
Q1
Q0
Q2
Q6
Q7
Q3
Vss
Vdd
RES
CLK
CL
CA
Q9
Q4
Q8
KI1
KI2
CK
KRST
IC301
16 keys
RESET
CLOCK
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
CLOCK
INHIBIT
CARRY
OUT
Fig. 11 Decade counter timing chart
Fig. 9 Memory circuit

TK-285/(N)
10
8. Power Supply Circuit
Battery +B is supplied via a 3A fuse from the battery terminal
connected to the TX-RX unit. After passing through the power
switch, power supply (SB) is applied to the three AVRs. IC5
supplies 5V (5M) to the control circuit, and IC9 supplies 5V
(5C) to common circuits. IC6 supplies to the TX circuit, the RX
circuit and common circuits of needless save mode. During
transmission, 5TC becomes Low and Q3 is turned ON to supply
5V (5T) to the TX circuit. During reception, 5RC becomes Low
and Q2 is turned ON to supply 5V (5R) to the RX Circuit.
Fig. 14 Power supply circuit
Fig. 13 Decode
IC4
AMP
IC13
AF IC
IC11
LPF
IC19
CPU
AF
RDT
LSD
IN
21
95
CIRCUIT DESCRIPTION
Fig. 12 Encode
SUM
SUM
IC7(1/2)
SUM
R166 R162
C176 C170
R136
1
LSD
OUT
HSD
OUT
IC19
CPU
O5
O2
O3
O6
I2
I1
I5
IC8
D/A (ADJ)
VCO
MD A1
RX Audio
MIC IN
IC13
2LPF
IC10
I6
I3
VCXO
X1
MB
AF
AMP
IC7 (2/2)
O1 BUFF
AMP
IC1
7-2. Decode
●Low-speed data (QT,DQT)
The demodulated signal from the IF IC (IC12) is amplified
by IC4 (2/2) and passes through a low-pass filter (IC11) to
remove audio components. The signal is input to pin 95 of the
CPU.
The CPU digitizes this signal, performs processing such as
DC restoration, and decodes the signal.
●FFSK
The FFSK input signal from the IF IC is amplified by IC4
(1/ 2) and goes to pin 5 of IC13. The signal is demodulated by
FFSK demodulator in IC13. The demodulated data goes to
the CPU for processing.
7. Signalling Circuit
7-1. Encode
●Low-speed data (QT,DQT)
Low-speed data is output from pin 1 of the CPU. The signal
passes through a low-pass CR filter, and goes to the summing
amplifier (IC7 1/2). The signal is mixed with the audio signal
and goes to the VCO (A1) and VCXO (X1) modulation input
after passing through the D/A converter (IC8) for BAL
adjustment.
●High-speed data (DTMF)
High-speed data (HSD) is output from pin 2 of the CPU.
The signal passes through a low-pass filter consisting of IC10,
and provides a TX HSD tone and a RX HSD tone. TX HSD
deviation making an adjustment by microprocessor is passed
through the D/A convertor (IC8) and then applied to the audio
processor (IC13).
The signal is mixed with the audio signal and goes to the
VCO and VCXO. The RX HSD tone is passed a summing
amplifier (IC7 2/2). The D/A converter (IC8) for audio control,
audio power amplifier and then to the speaker.
●FFSK
ESN utilizes 1200bps FFSK signal. FFSK signal is output
from pin 6 of IC13. The signal passes through the D/A converter
(IC8) for the FFSK deviation adjustment. and is routed to the
VCO. When encoding FFSK, the microphone input signal is
muted.
Display unit
Q2
5RC
5TC
5R
5T
5CNS
IC6
IC9
IC5
Q3
RF power amp (IC100)
+B
F1
SB
ON/OFF
VOL
5M
5C

TK-285/(N)
11
CIRCUIT DESCRIPTION / SEMICONDUCTOR DATA
9. Optional Board Terminal
Terminals for mounting the option board are provided at
the bottom edge of the TX-RX unit. The table below shows the
correspondence between the board and terminals. R37, R69,
R249, R258, R259, R304, R305 may have to be removed
depending on the type of option board being used.
Name Function
SB Battery (7.5V)
GND Ground
TXD Serial data
RXD Serial data
SQ Busy: high
LOK Link acquired : low (TX mode)
DI/ANI Modulation (ANI) input
DEO Detect output
TXAI/MUTE Modulation output from board or mic mute: low
TXAO Modulation input to board
RXAI Received signal input to board
RXAO Received signal output from board
D1 Binary 1
D2 Binary 2
OPT Scramble, Emergency:low
PTTIN PTT switch signal input to board (TX:low)
5CNS Battery (5V)
DI9 9600 bps data input
RXEMAO Received signal output from board (after de-
emphasis)
RXEMAI Received signal input to board (after de-
emphasis)
PTTOUT PTT switch signal output from board (TX:low)
MONI Busy:low
LAMP Busy:low
AAC Audio Amp Control signal output from board
(Busy:high)
Audio Beep Beep signal output from board.
AUX TXD Serial data
AUX RXD Serial data/Option switch port.
/EXT SW
Table 1 Terminal name and function
1 LSDOUT O Low speed data output.
2 HSDOUT O High speed data output.
3 HSDIN I High speed data input.
4 DTMSTD I DTMF decode IC data detect input.
5 SELF I Self programming mode input.
6 BYTE I +5V.
7 CNVSS I GND.
8 SFTOE O Shift register output enable.
9 LCDCS O LCD driver chip select output.
10 RESET I Microcomputer reset input.
11 XOUT - 9.8304MHz (System clock).
12 VSS - GND.
13 XIN - 9.8304MHz (System clock).
14 VCC - +5V
15 AUX I AUX switch input.
16 AFTRD I FFSK modulation data output timing pulse
input.
17 AFRTM I FFSK demodulation data input timing pulse
input.
18 EN2 I Encoder pulse input 2.
19 PLLCLK O PLL IC clock output.
20 BEEP O Beep data output.
21 AFRDT I FFSK demodulation data input.
22 AFREG1 O AF IC register switching data output 1.
23 AFREG2 O AF IC register switching data output 2.
24 EEPDAT O EEPROM data output.
25 DACSTB O D/A converter IC data strobe output.
26 AFCLR O FFSK flame reset output.
27 SAVE O Battery save output.
28 LAMP I LAMP switch input.
29 AUXTXD O External Serial interface output.
30 AUXRXD I External Serial interface input.
31 PLLUL I PLL unlock detect input.
32 AFFFSKE O FFSK modulation enable (Enable active “H”).
33 TXD O Serial interface output (ex. PC).
34 RXD I Serial interface input (ex. PC).
35 AFDAT O FFSK data output.
36 PTT I PTT switch input.
37 RDY - Not used.
38 ALE - Not used.
39 HOLD - Not used.
40 HLDA - Not used.
41 BLCK - Not used.
42 RD - Flash memory RD bus.
43 BHE - Not used.
44 WR - Flash memory WR bus.
45 DTMCLK O DTMF decode IC clock output.
46 CNTCLK O Common clock output.
47 PLLSTB O PLL IC data strobe output.
48 CS0 O Flash memory chip enable.
Pin Port I/O Function
No. Name
Microprocesser : 30620M8-394GP
(TX-RX UNIT : IC19)
■Pin function
SEMICONDUCTOR DATA

TK-285/(N)
12
PLL System : SA7025DK (TX-RX Unit : IC14)
■Block diagram
1 CLOCK Serial clock input.
2 DATA Serial data input.
3 STROBE Serial strobe input.
4 Vss Digital ground.
5RFIN Prescaler positive input.
6RFIN Prescaler negative input.
7 VccPPrescalerpositiveSupplyvoltage. This pinsupplies
power to the prescaler and RF input buffer.
8 REFIN Reference divider input.
9 RA Auxiliary current setting; resistor to VSSA.
10 AUXIN AuxIliary divider input.
11 PHA Auxiliary phase detector output.
12 VSSA analog ground.
13 PHI Integral phase detector output.
14 PHP Proportional phase detector output.
15 VDDA Analog supply voltage. This pin supplies power
to the charge pumps, Auxiliary prescaler.
Auxiliary and Reference buffers.
16 RN Main current setting; resistor to VSSA.
17 RF Fractional compensation current setting;
resistor to VSSA.
18 LOCK Lock detector output.
19 TEST Test pin; connect to VDD.
20 VDD Digital supply voltage. This pin supplies power
to the CMOS digital part of the device.
Pin No. Symbol Description
■Pin description
SEMICONDUCTOR DATA
Pin Port I/O Function
No. Name
49 A19 - Not used.
50~59 A9~A18 - Flash memory address bus.
60 VCC - +5V
61 A8 - Flash memory address bus.
62 VSS - GND.
63~70 A0~A7 - Flash memory address bus.
71 MONI I Monitor switch input.
72 EN4 I Encoder pulse input 4.
73 EN3 I Encoder pulse input 3.
74 EN1 I Encoder pulse input 1.
75 MINDAT O Common data output.
76 KEY2 I Key scan input 2.
77 KEY1 I Key scan input 1.
78 RESET O Key scan IC reset output..
79~86 D0~D7 - Flash memory data bus.
87 DTMDAT I DTMF decode IC data input.
88 PF I PF switch input.
89 VOL I Volume level input.
90 BATT I Battery voltage input.
91 ANLSQL I Squelch level input.
92 TEMP I Thermistor input.
93 RSSI I Received signal strength indicator input
(RSSI).
94 AVSS - GND.
95 LSDIN I Low speed data input.
96 VREF - +5V
97 AVCC - +5V
98 SFTSTB1 O Shift register data strobe output.
99 W/N O Wide/Narrow switching output.
100 AFSTB O AF IC data strobe output.

TK-285/(N)
13
IC1,2 IC Buffer amplifier
IC3 IC Voltage detector / Reset
IC4 IC Buffer amplifier
IC5 IC Voltage regulator / 5M
IC6 IC Voltage regulator / 5V
IC7 IC Buffer amplifier
IC8 IC D/A converter (Adjustment)
IC9 IC Voltage regulator / 5C
IC10 IC Active filter / For HSDout
IC11 IC Active filter / For LSDin
IC12 IC FM IF system
IC13 IC Audio processor
IC14 IC PLL system
IC16 IC DTMF decoder
IC17 IC Flash memory
IC18 IC Active DBM
IC19 IC Microprocessor
IC20 IC EEPROM
IC21,22 IC Shift register / Output expander
IC23 IC Comparator (APC)
IC24 IC Analog switch
IC25 IC Active filter
Q1 Transistor Switch
Q2 FET DC switch / 5R
Q3 Transistor DC switch / 5T
Q4 Transistor Noise amplifier / Squelch
Q5 FET DC switch / Save
Q6 Transistor 2nd IF W/N switch sets to on when Narrow
DISPLAY UNIT (X54-3210-13)
DESCRIPTION OF COMPONENTS
Q7 Transistor 2nd IF W/N switch sets to on when Wide
Q8 Transistor Ripple filter
Q9 Transistor DC switch / W/N audio amplitude adjust
Q10 Transistor AF mute switch
Q11 FET Mute switch
Q12 Transistor IF amplifier
Q13 FET Mute switch / MIC line mute
Q14 FET DC switch
Q15 FET DET mute
Q16 Transistor PLL IC fin amplifier
Q17 FET Mute switch / MIC line mute
Q18 Transistor Buffer amplifier
Q19 Transistor Clock frequency shift
Q20 Transistor RF amplifier / TX driver
Q21 FET DC switch
Q22 Transistor DC switch
Q23 FET DC switch
Q24 FET RF amplifier
Q25 Transistor DC switch
D1 Diode Reverse protection
D2 Diode Overload protection
D3 Diode Reverse current protection
D4 Diode Noise detection
D5 Diode RF switch (2nd IF wide/narrow)
D6 Diode Current steering
D7 Diode RF switch (2nd IF wide/narrow)
D8 Diode Voltage clamp
D9 Diode TX/RX switch
D10 Diode Overload protection
D11 Diode Speed up
D12,14 Diode ANT switch
D16,17 Diode Varactor tuning
D18,19 Diode Surge absorption
D20,21 Diode Varactor tuning
D22 Diode ANT switch
D23 Diode TX/RX switch
D24 Diode Voltage drop
D401 Diode ANT switch
D402 Diode Discharge
IC300 IC Audio power amplifier
IC301 IC Counter /Key scan
Q300 FET DC switch / INT MIC on/off
Q301 FET DC switch
Q302 Transistor DC switch / LED (Red) driver
Q303 Transistor DC switch / LED (Green) driver
Q304 Transistor DC switch
Q305 Transistor Current driver / Audio amp AVR
Q306 Transistor DC switch
Q307 Transistor Current driver / LCD back light LED AVR
Q308 FET DC switch / SP INT/EXT
Q309 Transistor Temperature compensation
Q310 FET Mute switch
D300 Zener diode Surge absorption
D301 LED LED / Red, Green
D302 Diode Quick discharge /AF mute
D303 Zener diode Voltage reference
D304 Diode Voltage reference
D305~310 LED LCD back light
D315~318 Diode Reverse current prevention
D319~321 Zener diode Surge absorption
Ref. No. Use/Function Operation/Condition
Ref. No. Use/Function Operation/Condition
TX-RX UNIT (X57-619X-XX)
Ref. No. Use/Function Operation/Condition
Q1 FET DC switch
Q2,3 FET VCO oscillation
Q4 Transistor DC switch
Q5 Transistor RF Buffer amplifier
D1-D8 Diode Frequency control
D9 Diode TX modulation
Ref. No. Use/Function Operation/Condition
SUB UNIT (X58-473X-XX)

TK-285/(N) PARTS LIST
Parts No. Description Address New
parts
Destination Destination Ref. No. Parts No. Description Address New
parts
Ref. No.
TK-285/(N)
∗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.
L: Scandinavia K: USA P: Canada
Y: PX (Far East, Hawaii) T: England E: Europe
Y: AAFES (Europe) X: Australia M: Other Areas
TK-285/(N)
DISPLAY UNIT (X54-3210-13)
14
!
52 1A K29-5157-03 KNOB (PTT)
53 1A K29-5158-03 KEY TOP (PTT)
54 1A K29-5165-03 LEVER KNOB
55 1B K29-5231-03 KNOB (VOL)
56 1B K29-5232-03 KNOB (ENC)
A 3B N14-0569-04 CIRCULAR NUT(VOL.ENC)
B 3B N30-2604-46 PAN HEAD MACHINE SCREW(ANT)
C 3A N30-2610-46 PAN HEAD MACHINE SCREW(CASE)
D 2B N67-2606-46 PAN HEAD SEMS SCREW W(P-MODULE)
E 3A,3B N79-2025-46 PAN HEAD TAPTITE SCREW(TERMINAL)
F 2A,2B N83-2005-46 PAN HEAD TAPTITE SCREW(UNIT)
57 2C N99-2004-05 SCREW SET ACSY
58 3B R31-0617-05 VARIABLE RESISTOR (POWER SW/VOL)
59 2B S70-0414-05 TACT SWITCH
SP 1B T07-0714-05 SPEAKER
ANT 2C T90-0733-05 HELICAL ANTENNA ACSY K,E
ANT 2C T90-0734-05 HELICAL ANTENNA ACSY (N)M
MIC 2B T91-0579-05 MIC ELEMENT
IC100 2B ∗M68779H HYBRID IC(POWER MODULE) (N)M
IC100 2B ∗M68779M HYBRID IC(POWER MODULE) K,E
61 3B W02-1814-05 ENCODER
62 1D W09-0900-35 BATTERY ASSY ACSY E
63 3B G13-1794-04 CUSHION(MCF)
X54-3210-13 DISPLAY UNIT
D301 B30-2019-05 LED(RE/GR)
D305-310 B30-2171-05 LED
C301 CC73GCH1H470J CHIP C 47PF J
C302 C92-0560-05 CHIP-TAN 10UF 6.3WV
C304 CK73FB1C474K CHIP C 0.47UF K
C305 CC73GCH1H101J CHIP C 100PF J
C307 CK73GB1C104K CHIP C 0.10UF K
C308 CC73GCH1H101J CHIP C 100PF J
C309 CK73FB1C474K CHIP C 0.47UF K
C310 CK73GB1C104K CHIP C 0.10UF K
C311 CC73GCH1H470J CHIP C 47PF J
C312 CK73GB1C104K CHIP C 0.10UF K
C313 C92-0628-05 CHIP-TAN 10UF 10WV
C314 C92-0647-05 TAN C 3.3UF 4WV
C315 CC73GCH1H101J CHIP C 100PF J
C316,317 CC73GCH1H470J CHIP C 47PF J
C318 CC73GCH1H101J CHIP C 100PF J
C321-333 CC73GCH1H470J CHIP C 47PF J
C335-339 CC73GCH1H470J CHIP C 47PF J
C340 CK73GB1E153K CHIP C 0.015UF K
C341-344 CC73GCH1H470J CHIP C 47PF J
CN300 E40-5891-05 FLAT CABLE CONNECTOR(24P)
CN301 E40-5892-05 FLAT CABLE CONNECTOR (14P)
CN302 E40-5662-05 PIN ASSY SOCKET(2P:SP)
CN303 E40-5887-05 PIN ASSY(4P:PTT)
CN304 E40-5823-05 FLAT CABLE CONNECTOR(LCD)
DISPLAY UNIT (X54-3210-13)
1 1A A02-2055-53 CABINET ASSY (16KEYS)
2 3B A62-0535-04 PANEL ASSY
3 2C B09-0363-03 CAP (SP/MIC) ACSY
4 2A B38-0834-05 LCD ASSY
5 1B B43-1106-14 BADGE (KENWOOD)
72C∗B62-1264-00 INSTRUCTION MANUAL ACSY
83B∗B72-1716-04 MODEL NAME PLATE K
83B∗B72-1717-04 MODEL NAME PLATE (N)M
83B∗B72-1768-04 MODEL NAME PLATE E
9 3B E04-0416-05 RF COAXIAL RECEPTACLE(SMA)
10 2B E23-1104-04 TERMINAL (ANT)
11 3A,3B E23-1166-04 RELAY TERMINAL
14 2B E37-0672-05 FLAT CABLE
15 3A E37-0673-05 LEAD WIRE WITH CONNECTOR (PTT)
16 1B E37-0674-15 LEAD WIRE WITH CONNECTOR (SP)
17 3B E58-0440-05 SQUARE SOCKET (SP/MIC)
18 3B ∗E72-0412-13 TERMINAL BLOCK
19 2B F10-2272-03 SHIELDING CASE (DBM)
20 3A F10-2305-04 SHIELDING PLATE (PLL)
21 2A F10-2310-03 SHIELDING PLATE (LCD)
22 2A F10-2340-03 SHIELDING CASE (VCO-OUT)
23 2B F10-2341-13 SHIELDING CASE (DBM/VCO)
24 3B F10-2353-14 SHIELDING PLATE (P-MODULE)
25 2B F10-2360-03 SHIELDING CASE (FRONT END)
26 3B F20-1181-04 INSULATING SHEET
27 2B F20-3303-04 INSULATING SHEET (MIC/GND)
28 1A G01-0881-04 COIL SPRING
29 1B G09-0418-05 KNOB SPRING (VOL,ENC)
30 1B G10-0799-04 FIBROUS SHEET (SP)
32 3A G11-2544-04 SHEET (CHASSIS)
34 3A G11-2590-04 SHEET (PTT)
35 2A G13-1731-04 CUSHION (LCD)
36 3B G13-1762-04 CUSHION (VOL/CHASSIS)
37 3B G13-1791-14 CUSHION (TERMINAL)
38 3B G53-0811-03 PACKING (TOP)
39 1B G53-0896-02 PACKING (16KEYS)
40 3A G53-1510-04 PACKING (BATT+)
41 3B G53-1520-24 PACKING (TERMINAL)
42 2D H12-3014-02 PACKING FIXTURE
43 1D H13-1072-04 CARTON BOARD K,(N)M
44 3D ∗H52-1575-02 ITEM CARTON CASE K,(N)M
44 3D ∗H52-1613-02 ITEM CARTON CASE E
45 1A J19-1572-04 HOLDER
46 2B J21-8398-03 HARDWARE FIXTURE (P-MODULE)
47 2C J29-0658-05 HOOK ACSY
48 3A J30-1263-04 SPACER(TERMINAL-)
49 3B J30-1264-04 SPACER(TERMINAL+)
50 3B J82-0045-05 FPC (VOL.ENC)
51 3B J82-0066-05 FPC (SQUARE SOCKET)

TK-285/(N)
PARTS LIST
15
Ref. No. Parts No. Description Address New
parts
Ref. No. Parts No. Description Address New
parts Destination Destination
TX-RX UNIT (X57-619X-XX)
Q309 2SC4617(S) TRANSISTOR
Q310 2SK1824 FET
TH300 TN10-3S154JT THERMISTOR
X57-6190-11 TX-RX UNIT K,E
X57-6190-21 TX-RX UNIT M
C1 CK73GB1H102K CHIP C 1000PF K
C2,3 CK73GB1E103K CHIP C 0.010UF K
C4-6 CK73GB1H102K CHIP C 1000PF K
C7 CK73GB1C104K CHIP C 0.10UF K
C8,9 CK73GB1E103K CHIP C 0.010UF K
C10 CK73GB1H102K CHIP C 1000PF K
C11 CK73GB1E103K CHIP C 0.010UF K
C12 CC73GCH1H101J CHIP C 100PF J
C13 C92-0628-05 CHIP-TAN 10UF 10WV
C14 C92-0592-05 CHIP-TAN 4.7UF 6.3WV
C15 CK73GB1H102K CHIP C 1000PF K
C16 C92-0650-05 TANTAL 10UF 6.3WV
C17 CK73FB1C334K CHIP C 0.33UF K
C18 C92-0628-05 CHIP-TAN 10UF 10WV
C19 C92-0592-05 CHIP-TAN 4.7UF 6.3WV
C20 CK73GB1C104K CHIP C 0.10UF K
C21 CK73GB1H331K CHIP C 330PF K
C22 C92-0592-05 CHIP-TAN 4.7UF 6.3WV
C23-25 CK73GB1H102K CHIP C 1000PF K
C26 CK73GB1E223K CHIP C 0.022UF K
C27-29 CK73GB1H102K CHIP C 1000PF K
C30 CK73GB1C104K CHIP C 0.10UF K
C31 CK73FB1A105K CHIP C 1.0UF K
C32,33 CK73GB1H102K CHIP C 1000PF K
C34 CK73GB1E103K CHIP C 0.010UF K
C35 CK73GB1C104K CHIP C 0.10UF K
C36,37 CK73GB1H102K CHIP C 1000PF K
C38,39 CK73GB1C104K CHIP C 0.10UF K
C40 C92-0713-05 TAN C 10UF 6.3WV
C41 CK73GB1H102K CHIP C 1000PF K
C42 CK73GB1C333K CHIP C 0.033UF K
C43 CK73GB1H102K CHIP C 1000PF K
C45 CC73GCH1H121J CHIP C 120PF J
C46 CK73GB1C104K CHIP C 0.10UF K
C47 CK73GB1H102K CHIP C 1000PF K
C48 CK73GB1C104K CHIP C 0.10UF K
C49 CC73GCH1H100D CHIP C 10PF D
C50 CK73GB1E103K CHIP C 0.010UF K
C51 CC73GCH1H271J CHIP C 270PF J
C52 CK73GB1H102K CHIP C 1000PF K
C53 CK73GB1E103K CHIP C 0.010UF K
C54 CK73GB1C104K CHIP C 0.10UF K
C55 C92-0662-05 CHIP-TAN 15UF 6.3WV
C56 CK73GB1H472K CHIP C 4700PF K
C57 CK73GB1H102K CHIP C 1000PF K
C58 CK73GB1H222K CHIP C 2200PF K
C59 CK73GB1C273K CHIP C 0.027UF K
C60 CK73GB1C104K CHIP C 0.10UF K
C61 CK73GB1E123K CHIP C 0.012UF K
C62 CK73GB1H122J CHIP C 1200PF J
C63 CK73GB1H102K CHIP C 1000PF K
DISPLAY UNIT (X54-3210-13)
TX-RX UNIT (X57-619X-XX)
TX-RX UNIT (X57-619X-XX)
0-11: K,E 0-21:(N)M
L300,301 L92-0141-05 FERRITE CHIP
L302,303 L92-0138-05 FERRITE CHIP
L304,305 L92-0141-05 FERRITE CHIP
L306,307 L92-0138-05 FERRITE CHIP
L308,309 L92-0141-05 FERRITE CHIP
CP300,301 R90-0723-05 MULTI-COMP 47K X2
CP302,303 R90-0724-05 MULTI-COMP 1K X4
R300 RK73GB1J103J CHIP R 10K J 1/16W
R301 RK73FB2A101J CHIP R 100 J 1/10W
R302 RK73GB1J470J CHIP R 47 J 1/16W
R303 RK73GB1J471J CHIP R 470 J 1/16W
R304 RK73GB1J182J CHIP R 1.8K J 1/16W
R305 RK73GB1J104J CHIP R 100K J 1/16W
R306 R92-1252-05 CHIP R 0 OHM
R307 RK73GB1J821J CHIP R 820 J 1/16W
R308 RK73GB1J153J CHIP R 15K J 1/16W
R309 R92-1252-05 CHIP R 0 OHM
R310 RK73GB1J331J CHIP R 330 J 1/16W
R311 RK73GB1J102J CHIP R 1.0K J 1/16W
R312 RK73GB1J104J CHIP R 100K J 1/16W
R313,314 RK73GB1J102J CHIP R 1.0K J 1/16W
R315 RK73GB1J104J CHIP R 100K J 1/16W
R316 RK73GB1J473J CHIP R 47K J 1/16W
R317 RK73GB1J472J CHIP R 4.7K J 1/16W
R318 RK73GB1J104J CHIP R 100K J 1/16W
R319-321 RK73GB1J820J CHIP R 82 J 1/16W
R324,325 RK73GB1J102J CHIP R 1.0K J 1/16W
R326 RK73GB1J124J CHIP R 120K J 1/16W
R327 RK73GB1J563J CHIP R 56K J 1/16W
R328 RK73GB1J124J CHIP R 120K J 1/16W
R331 RK73GB1J103J CHIP R 10K J 1/16W
R332 RK73GB1J272J CHIP R 2.7K J 1/16W
R333 RK73GB1J103J CHIP R 10K J 1/16W
R336 R92-1252-05 CHIP R 0 OHM
R337 RK73GB1J472J CHIP R 4.7K J 1/16W
R338-341 RK73GB1J101J CHIP R 100 J 1/16W
R342 R92-1252-05 CHIP R 0 OHM
S301-303 S70-0457-05 TACT SWITCH(PTT)
D300 NNCD6.8G ZENER DIODE
D302 1SS373 DIODE
D303 015AZ2.4-X ZENER DIODE
D304 MA2S111 DIODE
D315 IMN10 DIODE
D316,317 MA2S111 DIODE
D318 IMN10 DIODE
D319-321 015AZ6.8 ZENER DIODE
IC300 TDA7053AT IC(AUDIO AMP)
IC301 MC74HC4017F IC(COUNNTER)
Q300 2SJ243 FET
Q301 UPA672T FET
Q302-304 2SC4617(S) TRANSISTOR
Q305 2SB798(DL,DK) TRANSISTOR
Q306 2SC4617(S) TRANSISTOR
Q307 2SB1132(Q,R) TRANSISTOR
Q308 UPA672T FET

TK-285/(N) PARTS LIST
16
Ref. No. Parts No. Description Address New
parts
Ref. No. Parts No. Description Address New
parts Destination Destination
TX-RX UNIT (X57-619X-XX)
C64,65 CC73GCH1H680J CHIP C 68PF J
C66 CK73GB1C104K CHIP C 0.10UF K
C67,68 CK73GB1E103K CHIP C 0.010UF K
C69 CK73GB1C104K CHIP C 0.10UF K
C70 CC73GCH1H220J CHIP C 22PF J
C71 CK73GB1C683K CHIP C 0.068UF K
C72 CC73GCH1H100D CHIP C 10PF D
C73 CK73GB1C104K CHIP C 0.10UF K
C74 CK73GB1E103K CHIP C 0.010UF K
C75 CK73GB1C104K CHIP C 0.10UF K
C76 C92-0773-05 TAN C 15UF 6.3WV
C77 CK73GB1H562J CHIP C 5600PF J
C78 C92-0713-05 TAN C 10UF 6.3WV
C79 C92-0656-05 TAN C 2.2UF 6.3WV
C80 CK73GB1H102K CHIP C 1000PF K
C81 CK73GB1C333K CHIP C 0.033UF K
C82 CC73HCH1H101J CHIP C 100PF J
C83 CK73GB1H562J CHIP C 5600PF J
C84 CK73GB1H102K CHIP C 1000PF K
C85 CK73GB1H562J CHIP C 5600PF J
C86 CK73GB1C333K CHIP C 0.033UF K
C87 CK73GB1C104K CHIP C 0.10UF K
C88 CC73GCH1H820J CHIP C 82PF J
C90 CK73GB1H102K CHIP C 1000PF K
C91 C92-0773-05 TAN C 15UF 6.3WV
C92 CK73GB1H272J CHIP C 2700PF J
C93 CK73GB1C104K CHIP C 0.10UF K
C94 CK73GB1H102K CHIP C 1000PF K
C95 CC73GCH1H330J CHIP C 33PF J
C96 CC73GCH1H030C CHIP C 3.0PF C
C97,98 CK73GB1H272J CHIP C 2700PF J
C101 CK73GB1C104K CHIP C 0.10UF K
C102 CC73GCH1H151J CHIP C 150PF J
C103 CK73GB1H152J CHIP C 1500PF J
C104 CK73GB1H102K CHIP C 1000PF K
C105 CK73GB1E103K CHIP C 0.010UF K
C106 CC73GCH1H030C CHIP C 3.0PF C
C107 C92-0650-05 TANTAL 10UF 6.3WV
C108 C92-0714-05 TAN C 4.7UF 6.3WV
C109 CK73GB1C104K CHIP C 0.10UF K
C110 CK73GB1H102K CHIP C 1000PF K
C111 C92-0713-05 TAN C 10UF 6.3WV
C112 CK73GB1H102K CHIP C 1000PF K
C113 CK73GB1C104K CHIP C 0.10UF K
C116,117 CK73GB1C104K CHIP C 0.10UF K
C119 CK73GB1C473K CHIP C 0.047UF K
C120,121 CK73GB1C104K CHIP C 0.10UF K
C122 CK73GB1E103K CHIP C 0.010UF K
C123,124 CK73GB1C104K CHIP C 0.10UF K
C125 C92-0003-05 CHIP-TAN 0.47UF 25WV (N)M
C125 C92-0519-05 CHIP-TAN 1.0UF 25WV K,E
C126 C92-0714-05 TAN C 4.7UF 6.3WV
C127 CK73GB1C104K CHIP C 0.10UF K
C128 CK73GB1H562J CHIP C 5600PF J
C129 CK73GB1H102K CHIP C 1000PF K
C130 CK73GB1H562J CHIP C 5600PF J
C132 CC73GCH1H220J CHIP C 22PF J
C133 CK73GB1E153K CHIP C 0.015UF K
C134 CK73GB1E103K CHIP C 0.010UF K
C135 CK73GB1C563K CHIP C 0.056UF K
C136 CK73GB1E103K CHIP C 0.010UF K
C137 CC73GCH1H100D CHIP C 10PF D
C138 CK73GB1H102K CHIP C 1000PF K
C139 CC73GCH1H220J CHIP C 22PF J
C140 C92-0592-05 CHIP-TAN 4.7UF 6.3WV
C141 CK73GB1H102K CHIP C 1000PF K
C142 CC73GCH1H150J CHIP C 15PF J
C143 C92-0714-05 TAN C 4.7UF 6.3WV
C144 CK73FB1H563K CHIP C 0.056UF K
C146 CK73HB1H102K CHIP C 1000PF K
C148 CK73GB1H102K CHIP C 1000PF K
C149 CC73GCH1H060D CHIP C 6.0PF D
C154 CK73GB1H102K CHIP C 1000PF K
C157 CK73GB1H102K CHIP C 1000PF K
C158 CK73HB1C103K CHIP C 0.010UF K
C159 CK73GB1C104K CHIP C 0.10UF K
C160 CC73GCH1H100D CHIP C 10PF D
C164 CK73GB1E103K CHIP C 0.010UF K
C165 CC73GCH1H050C CHIP C 5.0PF C
C166 CK73HB1C103K CHIP C 0.010UF K
C167 CC73GCH1H150J CHIP C 15PF J
C168 CC73GCH1H270J CHIP C 27PF J
C169 CC73GCH1H1R5B CHIP C 1.5PF B
C170 CK73GB1E103K CHIP C 0.010UF K
C171 CK73HB1C103K CHIP C 0.010UF K
C172 CC73GCH1H120J CHIP C 12PF J
C175 CK73GB1C104K CHIP C 0.10UF K
C176 CK73GB1H472K CHIP C 4700PF K
C177,178 CK73GB1H102K CHIP C 1000PF K
C179 CK73GB1H471K CHIP C 470PF K
C180,181 CK73GB1H102K CHIP C 1000PF K
C182 CK73GB1E103K CHIP C 0.010UF K
C183 CC73GCH1H100D CHIP C 10PF D
C184 CC73GCH1H270J CHIP C 27PF J
C186 CK73GB1H102K CHIP C 1000PF K
C187 CC73GCH1H270J CHIP C 27PF J
C189,190 CK73GB1H102K CHIP C 1000PF K
C191 CK73HB1C103K CHIP C 0.010UF K
C192,193 CK73GB1H102K CHIP C 1000PF K
C194 CC73GCH1H220J CHIP C 22PF J
C195 CC73GCH1H150J CHIP C 15PF J (N)M
C195 CC73GCH1H160J CHIP C 16PF J K,E
C196 CK73HB1H102K CHIP C 1000PF K
C197 CC73GCH1H150J CHIP C 15PF J
C198 CK73FB1C474K CHIP C 0.47UF K
C199 CK73GB1H102K CHIP C 1000PF K
C200 C92-0565-05 CHIP-TAN 6.8UF 10WV
C201 CC73GCH1H470J CHIP C 47PF J
C202 CC73GCH1H060B CHIP C 6.0PF B (N)M
C202 CC73GCH1H150J CHIP C 15PF J K,E
C203 CK73GB1H102K CHIP C 1000PF K
C204 CC73GCH1H220J CHIP C 22PF J (N)M

TK-285/(N)
PARTS LIST
17
Ref. No. Parts No. Description Address New
parts
Ref. No. Parts No. Description Address New
parts Destination Destination
TX-RX UNIT (X57-619X-XX)
C204 CC73GCH1H330J CHIP C 33PF J K,E
C205 CK73GB1H102K CHIP C 1000PF K
C206 CC73GCH1H180J CHIP C 18PF J (N)M
C206 CC73GCH1H220J CHIP C 22PF J K,E
C207 CC73GCH1H020B CHIP C 2.0PF B (N)M
C207 CC73GCH1H040B CHIP C 4.0PF B K,E
C208 CK73GB1E103K CHIP C 0.010UF K
C209 CC73GCH1H010B CHIP C 1.0PF B K,E
C209 CC73GCH1H030B CHIP C 3.0PF B (N)M
C210,211 CK73GB1H102K CHIP C 1000PF K
C212 CC73GCH1H070B CHIP C 7.0PF B
C213 CK73FB1C474K CHIP C 0.47UF K
C214 CC73GCH1H110J CHIP C 11PF J (N)M
C214 CC73GCH1H130J CHIP C 13PF J K,E
C215 CC73GCH1H101J CHIP C 100PF J
C216 CC73GCH1H040B CHIP C 4.0PF B
C217 CC73GCH1H150J CHIP C 15PF J (N)M
C217 CC73GCH1H180J CHIP C 18PF J K,E
C218 CK73GB1H102K CHIP C 1000PF K
C219 CC73GCH1HR75B CHIP C 0.75PF B K,E
C219 CC73GCH1H010B CHIP C 1.0PF B (N)M
C220 CC73GCH1H101J CHIP C 100PF J
C221 CC73GCH1H030B CHIP C 3.0PF B K,E
C221 CC73GCH1H050B CHIP C 5.0PF B (N)M
C222 CK73GB1H102K CHIP C 1000PF K
C223 CC73GCH1H030B CHIP C 3.0PF B
C224-226 CK73GB1H102K CHIP C 1000PF K
C227 CC73GCH1H080B CHIP C 8.0PF B (N)M
C227 CC73GCH1H100C CHIP C 10PF C K,E
C228 CK73GB1H102K CHIP C 1000PF K
C229 CC73GCH1H470J CHIP C 47PF J
C230 CK73GB1H102K CHIP C 1000PF K (N)M
C233 CC73GCH1H040B CHIP C 4.0PF B (N)M
C233 CC73GCH1H4R5B CHIP C 4.5PF B K,E
C234 CC73GCH1H470J CHIP C 47PF J
C235 CK73GB1E103K CHIP C 0.010UF K
C236 CK73GB1H102K CHIP C 1000PF K
C237 CC73GCH1H100C CHIP C 10PF C
C238,239 CK73GB1H102K CHIP C 1000PF K
C241 CK73GB1H102K CHIP C 1000PF K
C242 CC73GCH1H070B CHIP C 7.0PF B (N)M
C242 CC73GCH1H100C CHIP C 10PF C K,E
C243 CK73GB1H102K CHIP C 1000PF K
C244 CC73GCH1H030B CHIP C 3.0PF B
C245 CK73GB1H102K CHIP C 1000PF K
C246 CC73GCH1H060B CHIP C 6.0PF B (N)M
C246 CC73GCH1H100C CHIP C 10PF C K,E
C247 CC73GCH1H080B CHIP C 8.0PF B (N)M
C247 CC73GCH1H090B CHIP C 9.0PF B K,E
C248 CC73GCH1H180J CHIP C 18PF J (N)M
C248 CC73GCH1H220J CHIP C 22PF J K,E
C249 CK73GB1H102K CHIP C 1000PF K
C251 CC73GCH1H390J CHIP C 39PF J (N)M
C251-253 CK73GB1H102K CHIP C 1000PF K K,E
C252,253 CK73GB1H102K CHIP C 1000PF K (N)M
C255 CK73GB1H102K CHIP C 1000PF K
C256,257 CK73HB1C103K CHIP C 0.010UF K
C259 CK73GB1E103K CHIP C 0.010UF K
C260 CC73GCH1H270J CHIP C 27PF J
C261 CK73GB1E103K CHIP C 0.010UF K
C262 CC73GCH1H010B CHIP C 1.0PF B K,E
C263 CC73GCH1H010B CHIP C 1.0PF B (N)M
C263 CC73GCH1H1R5B CHIP C 1.5PF B K,E
C265 CK73GB1C104K CHIP C 0.10UF K
C266 CC73GCH1H181J CHIP C 180PF J
C267 CC73GCH1H680J CHIP C 68PF J
C268 CK73GB1C104K CHIP C 0.10UF K
C401 CK73GB1C104K CHIP C 0.10UF K
C402 CC73GCH1H471J CHIP C 470PF J K,E
C402 CK73GB1H681K CHIP C 680PF K (N)M
C403 CC73GCH1H330J CHIP C 33PF J (N)M
C403 CC73GCH1H390J CHIP C 39PF J K,E
C404 CK73GB1H102K CHIP C 1000PF K
C405 CK73GB1C683K CHIP C 0.068UF K (N)M
C405 CK73GB1H103K CHIP C 0.010UF K K,E
C406 CC73GCH1H330J CHIP C 33PF J (N)M
C406 CC73GCH1H470J CHIP C 47PF J K,E
C407 CC73GCH1H180J CHIP C 18PF J (N)M
C407 CC73GCH1H270J CHIP C 27PF J K,E
C408 C92-0602-05 CHIP-TAN 1.0UF 10WV
C410 C92-0714-05 TAN C 4.7UF 6.3WV
C411 CK73HB1H102K CHIP C 1000PF K K,E
C412 CK73HB1A104K CHIP C 0.10UF K
C413,414 CK73HB1H102K CHIP C 1000PF K
C421 CC73GCH1H471J CHIP C 470PF J
CN1 E40-5823-05 FLAT CABLE CONNECTOR(10P)
CN2 E40-9517-05 PIN ASSY SOCKET(4P)
CN3 E40-5890-05 FLAT CABLE CONNECTOR(24P)
CN4 E23-0342-05 TEST TERMINAL
CN5-12 E23-1081-05 TERMINAL
F1 F53-0130-05 FUSE(3A)
CD1 L79-1072-05 TUNING COIL
CF2 L72-0963-05 CERAMIC FILTER(455KHz)
L1 L92-0149-05 FERRITE CHIP
L2 L92-0138-05 FERRITE CHIP
L3 L40-4791-37 SMALL FIXED INDUCTOR(4.7UH)
L4 L40-1091-37 SMALL FIXED INDUCTOR(1.0UH)
L5,6 L92-0138-05 FERRITE CHIP
L8 L92-0138-05 FERRITE CHIP
L9 L40-2771-36 SMALL FIXED INDUCTOR(27NH)
L10 L40-6871-36 SMALL FIXED INDUCTOR(68NH)
L11,12 L92-0138-05 FERRITE CHIP
L14 L40-1081-36 SMALL FIXED INDUCTOR(100NH)
L15 L40-3371-36 SMALL FIXED INDUCTOR(33NH)
L17 L40-4771-36 SMALL FIXED INDUCTOR(47NH)
L18 L39-1272-05 TOROIDAL COIL
L19 L92-0138-05 FERRITE CHIP
L20 L40-4771-36 SMALL FIXED INDUCTOR(47NH)
L21,22 L39-1272-05 TOROIDAL COIL
L24 L92-0138-05 FERRITE CHIP
L25 L40-1081-36 SMALL FIXED INDUCTOR(100NH)

TK-285/(N) PARTS LIST
18
Ref. No. Parts No. Description Address New
parts
Ref. No. Parts No. Description Address New
parts Destination Destination
TX-RX UNIT (X57-619X-XX)
L26 L92-0138-05 FERRITE CHIP
L27 L40-3978-67 SMALL FIXED INDUCTOR(39NH) (N)M
L27 L40-4778-67 SMALL FIXED INDUCTOR(47NH) K,E
L28 L92-0138-05 FERRITE CHIP
L29 L40-3375-54 SMALL FIXED INDUCTOR(33NH)
L30 L92-0149-05 FERRITE CHIP
L31 L40-1278-67 SMALL FIXED INDUCTOR(12NH)
L32 L34-4564-05 AIR-CORE COIL
L33 L40-2278-67 SMALL FIXED INDUCTOR(22NH)
L34 L40-1095-34 SMALL FIXED INDUCTOR(1UH)
L35 L40-2288-67 SMALL FIXED INDUCTOR(220NH)
L36 L40-1278-67 SMALL FIXED INDUCTOR(12NH)
L37 L34-4567-05 AIR-CORE COIL
L38 L40-2271-36 SMALL FIXED INDUCTOR(22NH)
L39 L34-4567-05 AIR-CORE COIL
L40 L40-3978-67 SMALL FIXED INDUCTOR(39NH) (N)M
L40 L40-4778-67 SMALL FIXED INDUCTOR(47NH) K,E
L41 L34-4567-05 AIR-CORE COIL
L43,44 L34-4564-05 AIR-CORE COIL
L45 L40-1092-81 SMALL FIXED INDUCTOR
L47,48 L34-4564-05 AIR-CORE COIL
L49 L92-0138-05 FERRITE CHIP
L51 L40-2288-67 SMALL FIXED INDUCTOR(220NH)
L401 L40-5678-96 SMALL FIXED INDUCTOR(56NH)
L407,408 L34-4567-05 AIR-CORE COIL
X1 L77-1789-05 TCXO (16.8MHZ)
X2 L77-1760-15 CRYSTAL RESONATOR(44.395MHZ)
X3 L77-1708-05 CRYSTAL RESONATOR(3.579545MHZ)
X4 L78-0462-05 RESONATOR (9.8304MHZ)
XF1 ∗L71-0583-05 MCF (44.85MHZ)
CP1 R90-0724-05 MULTI-COMP 1K X4
CP2 R90-0718-05 MULTI-COMP 4.7K X4
CP4,5 R90-0743-05 MULTIPLE RESISTOR 47K X2
CP6-21 R90-0741-05 MULTIPLE RESISTOR 1K X2
CP22-24 R90-0743-05 MULTIPLE RESISTOR 47K X2
R1 RK73GB1J103J CHIP R 10K J 1/16W
R2 RK73GB1J473J CHIP R 47K J 1/16W
R3 RK73GB1J154J CHIP R 150K J 1/16W
R4 RK73GB1J104J CHIP R 100K J 1/16W
R5 RK73HB1J103J CHIP R 10K J 1/16W
R6,7 RK73GB1J104J CHIP R 100K J 1/16W
R8 RK73HB1J472J CHIP R 4.7K J 1/16W
R9 RK73HB1J474J CHIP R 470K J 1/16W
R10 RK73HB1J472J CHIP R 4.7K J 1/16W
R11 RK73GB1J104J CHIP R 100K J 1/16W
R12 RK73GB1J184J CHIP R 180K J 1/16W
R13 RK73GB1J333J CHIP R 33K J 1/16W
R14 RK73GB1J223J CHIP R 22K J 1/16W
R15 RK73GB1J104J CHIP R 100K J 1/16W
R16,17 RK73GB1J473J CHIP R 47K J 1/16W
R18 RK73GB1J154J CHIP R 150K J 1/16W
R19 RK73GB1J104J CHIP R 100K J 1/16W
R20 RK73HB1J104J CHIP R 100K J 1/16W
R21 RK73GB1J104J CHIP R 100K J 1/16W (N)M
R21 RK73GB1J683J CHIP R 68K J 1/16W K,E
R22,23 RK73GB1J823J CHIP R 82K J 1/16W
R24 RK73GB1J473J CHIP R 47K J 1/16W
R25 RK73GB1J472J CHIP R 4.7K J 1/16W
R26 RK73GB1J473J CHIP R 47K J 1/16W
R27 RK73GB1J332J CHIP R 3.3K J 1/16W
R28 RK73GB1J474J CHIP R 470K J 1/16W
R29 RK73GB1J184J CHIP R 180K J 1/16W
R30 RK73GB1J334J CHIP R 330K J 1/16W
R31 RK73GB1J102J CHIP R 1.0K J 1/16W
R32 RK73GB1J104J CHIP R 100K J 1/16W
R33 RK73GB1J184J CHIP R 180K J 1/16W
R34 RK73GB1J683J CHIP R 68K J 1/16W
R35 RK73GB1J220J CHIP R 22 J 1/16W
R36 RK73GB1J154J CHIP R 150K J 1/16W
R37 R92-1252-05 CHIP R 0 OHM
R38 RK73GB1J101J CHIP R 100 J 1/16W
R39 RK73GB1J472J CHIP R 4.7K J 1/16W
R40,41 RK73GB1J334J CHIP R 330K J 1/16W
R42,43 RK73GB1J223J CHIP R 22K J 1/16W
R44 RK73GB1J473J CHIP R 47K J 1/16W
R45 RK73GB1J472J CHIP R 4.7K J 1/16W
R46,47 RK73GB1J223J CHIP R 22K J 1/16W
R48 R92-1252-05 CHIP R 0 OHM
R49 RK73GB1J223J CHIP R 22K J 1/16W
R50 RN73GH1J913D CHIP R 91K D 1/16W
R51 RN73GH1J683D CHIP R 68K D 1/16W
R52 RN73GH1J913D CHIP R 91K D 1/16W
R53 RK73GB1J473J CHIP R 47K J 1/16W
R54 RK73GB1J123J CHIP R 12K J 1/16W
R55 RN73GH1J333D CHIP R 33K D 1/16W
R56 RK73GB1J472J CHIP R 4.7K J 1/16W
R57 RK73GB1J183J CHIP R 18K J 1/16W
R58 RK73GB1J184J CHIP R 180K J 1/16W
R59 RK73GB1J564J CHIP R 560K J 1/16W
R60 RK73GB1J123J CHIP R 12K J 1/16W
R61 RK73GB1J103J CHIP R 10K J 1/16W
R62 RN73GH1J913D CHIP R 91K D 1/16W
R63 RK73GB1J474J CHIP R 470K J 1/16W
R64 RK73GB1J153J CHIP R 15K J 1/16W
R65 RK73GB1J103J CHIP R 10K J 1/16W
R66 R92-1252-05 CHIP R 0 OHM
R67 RN73GH1J274D CHIP R 270K D 1/16W
R68 RK73GB1J223J CHIP R 22K J 1/16W
R69 R92-1252-05 CHIP R 0 OHM
R70 RN73GH1J682D CHIP R 6.8K D 1/16W
R72 RK73GB1J155J CHIP R 1.5M J 1/16W
R73 RK73GB1J471J CHIP R 470 J 1/16W
R74 RK73GB1J183J CHIP R 18K J 1/16W
R75 RN73GH1J683D CHIP R 68K D 1/16W
R76 RK73GB1J474J CHIP R 470K J 1/16W
R77 RK73GB1J393J CHIP R 39K J 1/16W
R78 RN73GH1J682D CHIP R 6.8K D 1/16W
R79 RK73GB1J101J CHIP R 100 J 1/16W
R80 RK73GB1J152J CHIP R 1.5K J 1/16W
R81 RK73GB1J220J CHIP R 22 J 1/16W
R83 RK73GB1J184J CHIP R 180K J 1/16W
R84 R92-1252-05 CHIP R 0 OHM

TK-285/(N)
PARTS LIST
19
Ref. No. Parts No. Description Address New
parts
Ref. No. Parts No. Description Address New
parts Destination Destination
TX-RX UNIT (X57-619X-XX)
R85 RK73GB1J103J CHIP R 10K J 1/16W
R86 RK73GB1J183J CHIP R 18K J 1/16W
R89 RK73GB1J102J CHIP R 1.0K J 1/16W
R90 RK73GB1J153J CHIP R 15K J 1/16W
R91 RK73GB1J473J CHIP R 47K J 1/16W
R93 RK73HB1J472J CHIP R 4.7K J 1/16W (N)M
R93 RK73HB1J562J CHIP R 5.6K J 1/16W K,E
R94 RK73HB1J473J CHIP R 47K J 1/16W
R95 RK73GB1J394J CHIP R 390K J 1/16W
R96 RK73GB1J122J CHIP R 1.2K J 1/16W K,E
R96 RK73GB1J182J CHIP R 1.8K J 1/16W (N)M
R97 RK73GB1J151J CHIP R 150 J 1/16W
R99 RK73GB1J104J CHIP R 100K J 1/16W
R100 R92-1252-05 CHIP R 0 OHM
R101 RK73GB1J560J CHIP R 56 J 1/16W
R102 RK73GB1J333J CHIP R 33K J 1/16W
R104 RK73GB1J102J CHIP R 1.0K J 1/16W
R106 RK73GB1J470J CHIP R 47 J 1/16W
R107 RK73GB1J473J CHIP R 47K J 1/16W
R109 R92-1252-05 CHIP R 0 OHM
R110 RK73GB1J220J CHIP R 22 J 1/16W
R114 RK73GB1J223J CHIP R 22K J 1/16W
R115 RK73GB1J184J CHIP R 180K J 1/16W
R116 RK73GB1J103J CHIP R 10K J 1/16W
R118 RK73GB1J181J CHIP R 180 J 1/16W
R119 RK73GB1J101J CHIP R 100 J 1/16W
R120 RK73GB1J224J CHIP R 220K J 1/16W
R121 RK73GB1J222J CHIP R 2.2K J 1/16W
R122 RK73GB1J181J CHIP R 180 J 1/16W
R123 RK73GB1J183J CHIP R 18K J 1/16W
R127 RK73GB1J103J CHIP R 10K J 1/16W
R129 RK73HB1J104J CHIP R 100K J 1/16W
R132,133 R92-1368-05 CHIP R 0 OHM
R134 R92-1252-05 CHIP R 0 OHM
R136 RK73GB1J472J CHIP R 4.7K J 1/16W
R137 RK73HB1J103J CHIP R 10K J 1/16W
R139,140 RK73HB1J473J CHIP R 47K J 1/16W
R143-151 RK73HB1J102J CHIP R 1.0K J 1/16W
R155 RK73GB1J102J CHIP R 1.0K J 1/16W
R159 RK73GB1J154J CHIP R 150K J 1/16W
R161 R92-1252-05 CHIP R 0 OHM
R162 RK73GB1J103J CHIP R 10K J 1/16W
R163 RK73HB1J103J CHIP R 10K J 1/16W
R166 RK73GB1J223J CHIP R 22K J 1/16W
R167,168 R92-1252-05 CHIP R 0 OHM
R177 RK73GB1J101J CHIP R 100 J 1/16W
R180 RK73GB1J473J CHIP R 47K J 1/16W
R184 RK73GB1J102J CHIP R 1.0K J 1/16W
R185 RK73GB1J470J CHIP R 47 J 1/16W
R189 RK73HB1J473J CHIP R 47K J 1/16W
R190 RK73GB1J472J CHIP R 4.7K J 1/16W
R192 RK73GB1J122J CHIP R 1.2K J 1/16W
R195 RK73GB1J222J CHIP R 2.2K J 1/16W
R199 RK73HB1J102J CHIP R 1.0K J 1/16W
R202 RK73GB1J181J CHIP R 180 J 1/16W
R217 RK73HB1J473J CHIP R 47K J 1/16W
R218 RK73GB1J220J CHIP R 22 J 1/16W
R219 RK73GB1J470J CHIP R 47 J 1/16W
R220 RK73HB1J102J CHIP R 1.0K J 1/16W
R221 RK73GB1J271J CHIP R 270 J 1/16W
R239 R92-1252-05 CHIP R 0 OHM
R240 RK73GB1J331J CHIP R 330 J 1/16W
R243 RK73GB1J180J CHIP R 18 J 1/16W
R244 RK73EB2ER39K CHIP R 0.39 K 1/4W
R246 RK73EB2ER39K CHIP R 0.39 K 1/4W
R247 R92-1252-05 CHIP R 0 OHM
R248 RK73EB2ER39K CHIP R 0.39 K 1/4W
R249 R92-1252-05 CHIP R 0 OHM
R250-252 RN73GH1J154D CHIP R 150K D 1/16W
R253 RK73GB1J221J CHIP R 220 J 1/16W
R254-256 RN73GH1J154D CHIP R 150K D 1/16W
R257 RK73GB1J221J CHIP R 220 J 1/16W
R258,259 R92-1252-05 CHIP R 0 OHM
R260 RK73GB1J103J CHIP R 10K J 1/16W
R261 RK73GB1J470J CHIP R 47 J 1/16W
R262,263 RK73GB1J104J CHIP R 100K J 1/16W
R264 RK73GB1J181J CHIP R 180 J 1/16W
R265 RK73GB1J473J CHIP R 47K J 1/16W
R266 RK73GB1J823J CHIP R 82K J 1/16W
R267 R92-1252-05 CHIP R 0 OHM
R268 RK73GB1J105J CHIP R 1.0M J 1/16W
R269 RK73GB1J223J CHIP R 22K J 1/16W
R270 RK73GB1J473J CHIP R 47K J 1/16W
R271 R92-1252-05 CHIP R 0 OHM
R272 RK73GB1J222J CHIP R 2.2K J 1/16W
R273 RK73GB1J103J CHIP R 10K J 1/16W
R276 RK73GB1J103J CHIP R 10K J 1/16W
R281 RK73GB1J331J CHIP R 330 J 1/16W
R282,283 RK73GB1J472J CHIP R 4.7K J 1/16W
R284 R92-1252-05 CHIP R 0 OHM
R294 RK73GB1J221J CHIP R 220 J 1/16W
R295 R92-1252-05 CHIP R 0 OHM
R296,297 RK73HB1J473J CHIP R 47K J 1/16W
R298 R92-1252-05 CHIP R 0 OHM
R300 R92-1252-05 CHIP R 0 OHM
R303-305 R92-1252-05 CHIP R 0 OHM
R306 RK73HB1J102J CHIP R 1.0K J 1/16W
R307 RK73GB1J272J CHIP R 2.7K J 1/16W
R308 RK73GB1J684J CHIP R 680K J 1/16W
R309 RK73GB1J271J CHIP R 270 J 1/16W
R401 RK73GB1J224J CHIP R 220K J 1/16W
R402,403 RK73GB1J394J CHIP R 390K J 1/16W
R404,405 RK73GB1J104J CHIP R 100K J 1/16W
R406 RK73HB1J473J CHIP R 47K J 1/16W
R408 RK73GB1J223J CHIP R 22K J 1/16W
R409 RK73GB1J394J CHIP R 390K J 1/16W
R410 RK73GB1J472J CHIP R 4.7K J 1/16W
R411 RK73HB1J102J CHIP R 1.0K J 1/16W
R412 RK73HB1J331J CHIP R 330 J 1/16W
R413 RK73GB1J471J CHIP R 470 J 1/16W K,E
R413 RK73GB1J681J CHIP R 680 J 1/16W (N)M
R414 RK73HB1J184J CHIP R 180K J 1/16W