Kenwood NEXEDGE NX-300 User manual

UHF DIGITAL TRANSCEIVER
NX-300
©2007-10 PRINTED IN JAPAN
B51-8811-00 (S) 243
SERVICE MANUAL
GENERAL ............................................................... 2
SYSTEM SET-UP ................................................... 2
REALIGNMENT ...................................................... 3
DISASSEMBLY FOR REPAIR ................................ 6
CIRCUIT DESCRIPTION ......................................... 9
COMPONENTS DESCRIPTION ........................... 15
PARTS LIST .......................................................... 17
EXPLODED VIEW................................................. 28
PACKING .............................................................. 29
ADJUSTMENT ..................................................... 30
TERMINAL FUNCTION ........................................ 52
PC BOARD
CONTROL UNIT (X53-4260-XX) .................... 64
TX-RX UNIT (X57-7370-10) ............................ 68
Does not come with antenna. Antenna is available as an option.
SCHEMATIC DIAGRAM
CONTROL UNIT (X53-4260-XX) .................... 72
TX-RX UNIT (X57-7370-10) ............................ 82
INTERCONNECTION DIAGRAM ......................... 86
BLOCK DIAGRAM ................................................ 88
LEVEL DIAGRAM ................................................. 92
OPTIONAL ACCESSORIES
KNB-47L (Li-ion BATTERY PACK) ................. 93
KNB-48L (Li-ion BATTERY PACK) ................. 93
SPECIFICATIONS .............................. BACK COVER
CONTENTS
MIC
1
2
ABC
5
JKL
0
8
TUV
4
7
GHI
PQRS
3
DEF
6
MNO
MIC
#
9
WXYZ
NX-300 K3 NX-300 K
Knob (Selector)
(K29-9408-13)
Knob (Selector)
(K29-9408-13)
Knob (Volume)
(K29-9407-03)
Knob (Volume)
(K29-9407-03)
Helical Antenna
(KRA-23:option)
Badge
(B43-1606-04)
Badge
(B43-1606-04)
Knob (PTT)
(K29-9405-03)
Knob (PTT)
(K29-9405-03)
Plastic cabinet assy
(18 key)
(A02-4003-13) Plastic cabinet assy
(6 key)
(A02-4002-13)
Packing (6 key)
(G53-1765-11)
Packing (18 key)
(G53-1766-11)
This product uses Lead Free solder.
This product complies with the RoHS directive for the European market.

NX-300
2
Document Copyrights
Copyright 2007 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, elec-
tronic, 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.
Firmware Copyrights
The title to and ownership of copyrights for firmware
embedded in Kenwood product memories are reserved for
Kenwood Corporation. Any modifying, reverse engineering,
copy, reproducing or disclosing on an Internet website of the
firmware is strictly prohibited without prior written consent of
Kenwood Corporation. Furthermore, any reselling, assigning
or transferring of the firmware is also strictly prohibited with-
out embedding the firmware in Kenwood product memories.
NXDN Transceivers:
The AMBE+2(TM) voice coding technology is embedded in
the firmware under the license of Digital Voice Systems, Inc.
GENERAL / SYSTEM SET-UP
INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced technicians
familiar with similar types of commercial grade communications
equipment. It contains all required service information for the
equipment and is current as of the publication date. Changes
which may occur after publication are covered by either Service
Bulletins or Manual Revisions. These are issued as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment information, the
full part identification number should be included. This applies to all
parts : components, kits, or chassis. If the part number is not known,
include the chassis or kit number of which it is a part, and a sufficient
description of the required component for proper identification.
PERSONAL SAFETY
The following precautions are recommended for personal safety:
•DO NOT transmit until all RF connectors are verified se-
cure and any open connectors are properly terminated.
•SHUT OFF and DO NOT operate this equipment near elec-
trical blasting caps or in an explosive atmosphere.
•
This equipment should be serviced by a qualified technician only.
SERVICE
This transceiver is designed for easy servicing. Refer to
the schematic diagrams, printed circuit board views, and
alignment procedures contained within.
SYSTEM SET-UP
Merchandise received
License and frequency allocated by FCC
Choose the type of transceiver
Transceiver programming
Are you using the optional antenna?
Are you using the speaker microphone?
A personal computer (IBM PC or compatible), programming interface
(KPG-36/36A), USB adapter(KCT-53U), and programming software (KPG-111D)
are required for programming.
(The frequency, and signaling data are programmed for the transceiver.)
Frequency range (MHz) RF power Type
DTMF keypad
TX/RX 450~520 5W NX-300 K No
Yes
TX/RX 450~520 5W NX-300 K3
YES KRA-23 or KRA-27
Optional antenna
NO
NO
(Option)
(Option)
YES KMC-25
Speaker microphone
Are you using the voice guide & storage unit?
NO (Option)
YES VGS-1
Delivery

NX-300
3
1. Modes
Mode Function
User mode For normal use.
Unprogramming mode If you turn the transceiver power ON using
any one of the following conditions, the
transceiver forcibly enters Unprogramming mode .
• FPU data is not written.
• No channel are programmed.
• When using kill.
• The ESN is not written.
• Broken hardware has been detected.
Panel test mode Used by the dealer to check the funda-
mental characteristics.
Panel tuning mode Used by the dealer to tune the transceiver.
PC mode Used for communication between the
transceiver and PC (IBM compatible).
Data programming Used to read and write frequency data and
mode other features to and from the transceiver.
PC test mode Used to check the transceiver using the PC.
This feature is included in the FPU.
See pages 39 to 51.
Firmware Used when changing the main program
programming mode of the flash memory.
Clone mode Used to transfer programming data from
one transceiver to another.
Firmware version Used to confirm the internal firmware
information version.
2. How to Enter Each Mode
Mode Operation
User mode Power ON
Panel test mode [ ] + Power ON
PC mode Received commands from PC
Panel tuning mode Press the [ ] key, in Panel test mode
Firmware [ ] + Power ON
programming mode
Clone mode [ ] + Power ON
Firmware version [Side1] + Power ON
information
3. Panel Test Mode
Setting method refer to ADJUSTMENT.
4. Panel Tuning Mode
Setting method refer to ADJUSTMENT.
5. PC Mode
5-1. Preface
The transceiver is programmed by using a personal com-
puter, programming interface (KPG-36/36A), USB adapter
(KCT-53U) and programming software (KPG-111D).
The programming software can be used with an IBM PC
or compatible. Figure 1 shows the setup of an IBM PC for
programming.
User mode
Panel test mode
Firmware version information
Panel tuning mode
Data programming mode
PC test mode PC tuning mode
PC mode
Clone mode
Unprogramming mode
Firmware
programming mode
1
2
ABC
4
7
GHI
3
DEF
MIC
IBM-PC
KPG-111D
KPG-36 or KPG-36A or
KPG-36A + KCT-53U
Illustration is KPG-36.
KPG-36
Transceiver
PC
D-SUB
(25-pin)
Transceiver
PC
KPG-36A
D-SUB
(9-pin)
Transceiver
PC
KPG-36A
KCT-53U
USB
Fig. 1
REALIGNMENT

NX-300
4
5-2. Connection procedure
1. Connect the transceiver to the computer using the inter-
face cable and USB adapter (When the interface cable is
KPG-36A, the KCT-53U can be used.).
Notes:
•You must install the KCT-53U driver in the computer to
use the USB adapter (KCT-53U).
•When using the USB adapter (KCT-53U) for the first time,
plug the KCT-53U into a USB port on the computer with
the computer power ON.
2. When the POWER switch on, user mode can be entered
immediately. When PC sends command the transceiver
enter PC mode, and “PROGRAM” is displayed on the LCD.
When data transmitting from transceiver, the red LED is lights.
When data receiving to transceiver, the green LED is lights.
Note:
The data stored in the computer must match the "Model
Name" when it is written into the flash memory.
5-3. KPG-36/KPG-36A description
(PC programming interface cable: Option)
The KPG-36/36A is required to interface the transceiver to
the computer. It has a circuit in its D-sub connector (KPG-36
: 25-pin, KPG-36A : 9-pin) case that converts the RS-232C
logic level to the TTL level.
The KPG-36/36A connects the universal connector of the
transceiver to the RS-232C serial port of the computer.
5-4. KCT-53U description (USB adapter : Option)
The KCT-53U is a cable which connects the KPG-36A to a
USB port on a computer.
When using the KCT-53U, install the supplied CD-ROM
(with driver software) in the computer. The KCT-53U driver
runs under Windows 2000 or XP.
5-5. Programming software KPG-111D description
The KPG-111D is the programming software for the trans-
ceiver supplied on a CD-ROM. This software runs under MS-
Windows 2000 or XP on an IBM-PC or compatible machine.
The data can be input to or read from the transceiver and
edited on the screen. The programmed or edited data can be
printed out. It is also possible to tune the transceiver.
6. Firmware Programming Mode
6-1. Preface
Flash memory is mounted on the transceiver. This allows
the transceiver to be upgraded when new features are re-
leased in the future. (For details on how to obtain the firm-
ware, contact Customer Service.)
6-2. Connection procedure
Connect the transceiver to the personal computer (IBM
PC or compatible) using the interface cable (KPG-36/36A) and
USB adapter (KCT-53U : when the interface cable is KPG-
36A, the KCT-53U can be used.). (Connection is the same as
in the PC Mode.)
6-3. Programming
1. Start up the firmware programming software (Fpro.exe
(version 4.0 or later))
2. Set the communications speed (normally, 115200 bps)
and communications port in the configuration item.
3. Set the firmware to be updated by File name item.
4. Press and hold the [ ] key while turning the transceiver
power ON. Then, the orange LED on the transceiver lights
and “PROGRAM 115200” is displayed.
5. Check the connection between the transceiver and the
personal computer, and make sure that the transceiver is
in the Program mode.
6. Press “write” button in the window. When the trans-
ceiver starts to receive data, the [LOADING] display lights.
7. If writing ends successfully, the checksum is calculated
and a result is displayed.
8. If you want to continue programming other transceivers,
repeat steps 4 to 7.
Note:
This mode cannot be entered if the Firmware Program-
ming mode is set to Disable in the Programming software.
6-4. Function
1. If you press the [Side2] key while “PROGRAM 115200” is
displayed, the display changes to “PROGRAM 19200”
(The LED blinks green) to indicate that the write speed is
low speed (19200 bps). If you press the [Side2] key again
while “PROGRAM 19200” is displayed, the display
changes to “PROGRAM 38400” (The LED lights red and
orange alternatively). If you press the [Side2] key again
while “PROGRAM 38400” is displayed, the display
changes to “PROGRAM 57600” (The LED blinks orange).
If you press the [Side2] key again while “PROGRAM
57600” is displayed, the display returns to “PROGRAM
115200” (The LED lights orange).
2. If you press the [Side1] key while “PROGRAM 115200” is
displayed, the checksum is calculated, and a result is dis-
played. If you press the [Side1] key again while the
checksum is displayed, “PROGRAM 115200” is
redisplayed.
Note:
Normally, write in the high-speed mode.
7. Clone Mode
Programming data can be transferred from one transceiver
to another by connecting them via their external universal con-
nectors. The operation is as follows (the transmit transceiver is
the source and the receive transceiver is a target).
The following data cannot be cloned.
•Tuning data
•Embedded message with password
•Model name data
•ESN (Electronic Serial Number) data
REALIGNMENT

NX-300
5
Key guide on the Read authorization password input screen.
•CONFRM ([ ] key):The password confirmation
•DELETE ([ ] key): Delete the least digit from the current
password number (Press and hold to
delete all password numbers)
•SELECT ([ ] key): Determine the least digit of the pass-
word number
1. Press and hold the [ ] key while turning the transceiver
power ON. If the Read authorization password is set to
the transceiver, the transceiver displays “CLONE LOCK”.
If the password is not set, the transceiver displays
“CLONE MODE”.
2. When you enter the correct password, and “CLONE
MODE” is displayed, the transceiver can be used as the
cloning source. The following describes how to enter the
password.
3.
•How to enter the password using the keypad (K3
model only);
If the [ ] / [ ] key is pressed while "CLONE LOCK" is
displayed, the Read authorization password input screen
is displayed.
If one of keys 0 to 9 is pressed while the Read authoriza-
tion password input screen is displayed, the pressed num-
ber is displayed on the LCD.
Each press of the key shifts the display in order to the left.
When you enter the password and press the [ ] or [*]
key, “CLONE MODE” is displayed if the entered pass-
word is correct. If the password is incorrect, “CLONE
LOCK” is redisplayed.
•How to enter the password using the [ ] and [ ]
keys (K, K3 models);
If the [ ] / [ ] key is pressed while "CLONE LOCK" is
displayed, the Read authorization password input screen
is displayed.
If the [ ] key or [ ] key is pressed while the Read
authorization password input screen is displayed, the
number (0 to 9) blinks on the LCD. When you press the
[ ] key, the currently selected number is determined. If
you press the [ ] key after entering the password in this
procedure, “CLONE MODE” is displayed if the entered
password is correct. If the password is incorrect, “CLONE
LOCK” is redisplayed.
4. Power ON the target transceiver.
5. Connect the cloning cable (part No. E30-3325-05) to the
universal connectors on the source and target.
6. Press the [ ] key on the source while the source displays
“CLONE MODE”. The data of the source is sent to the
target. While the target is receiving the data, “PRO-
GRAM” is displayed. When cloning of data is completed,
the source displays “END”, and the target automatically
operates in the User mode. The target can then be oper-
ated by the same program as the source.
7. The other target can be continuously cloned. When the
[ ] key on the source is pressed while the source displays
“END”, the source displays “CLONE MODE”. Carry out
the operation in step 4 to 6.
REALIGNMENT
Cloning cable
(E30-3325-05)
1
2
ABC
4
7
GHI
3
DEF
MIC
1
2
ABC
4
7
GHI
3
DEF
MIC
Fig. 2
Notes:
•Cannot be cloned if the password (overwrite password) is
programmed to the target.
•“Model Name” must be same to clone the transceiver.
8. Firmware Version Information
Press and hold the [Side1] key while turning the transceiver
power ON and then keep pressing and holding the [Side1]
key, the firmware version information appears on the LCD.

NX-300
6
■Removing the TOP packing (G53-1762-02)
1. Pull on the TOP packing with your fingers to turn it back as
shown in the figure z.
2. Pull the TOP packing to the left to remove the packing that
is fit into the left groove of the chassis x.
3. Pull the TOP packing to the right to remove the packing
that is fit into the right groove of the chassis c.
4. Remove the TOP packing v.
2. Precautions for Disassembly
■Removing the TX-RX unit from the chassis
1. Remove the cord ASSY from the connector of the TX-RX
unit (CN900) z.
2. Remove the PTT FPC from the connector of the TX-RX
unit (CN901) x.
3. Remove the 14 screws c.
4. Anchor the screw hole of the TX-RX unit using the tip of a
pair of tweezers as shown in the figure. Then, lift the TX-
RX unit to remove it from the chassis v.
DISASSEMBLY FOR REPAIR
CN901
PTT FPC
2
TX-RX unit
CN900
Cord ASSY
1
4
33
33
33
3
12
3
4
1. Precautions for Waterproof
•Do not remove the black sheet from the reverse side of
the transceiver (refer to the illustration right). Removal of
this sheet decreases the waterproof efficiency of the
transceiver and may cause malfunctions if water seeps
into the transceiver.
•The orange packing material on the reverse side of the
transceiver is important with respect to the waterproof
efficiency of the transceiver. Do not place stickers or other
materials on or around the packing material shown in the
figure, or on the reverse side of the battery pack. Doing so
will impair the waterproof efficiency of the transceiver and
may cause it to break down. Additionally, in order to
prevent damage to the packing material, do not allow it to
come in contact with foreign materials.

NX-300
7
DISASSEMBLY FOR REPAIR
3. Precautions for Reassembly
■Mounting the chassis onto the case
1. Place the key top on the chassis. Then, fit the chassis
tightly into the groove of the key top z.
Note:
Confirm that the entire groove of the key top fits to the
chassis tightly.
2
1
3
Auxiliary
(Orange)
key
18 key part
2. Mount the chassis onto the case x.
Note:
After mounting the chassis onto the case, if the 18 key
part on the key top or the Auxiliary (Orange) key part of the
VOL/CH packing gets stuck inside the case as shown in
the figure, return it to the normal position using a soft
tipped item (e.g., finger) c.
Prying it with a pointed metal tool such as forceps, may
damage the key top or packing.

NX-300
8
DISASSEMBLY FOR REPAIR
■Inserting the Volume and Channel switch into
the chassis
Insert the volume and channel switch into the chassis
with the VOL/CH FPC formed as shown in the figure.
■Forming the VOL/CH FPC, Cord ASSY and
Universal connector FPC
Form the VOL/CH FPC, Cord ASSY and Universal
connector FPC as shown in the figure.
■Installing lithium cell (W09-0971-05)
1. Insert a lithium cell into one side of the socket (CN401).
2. Push the lithium cell with your fingers as shown in the
figure to insert the lithium cell into the socket.
CN401
Control unit
■Affixing the keyboard ASSY (S79-0472-05)
Affix the keyboard ASSY to the Control unit as shown in
the figure.
After affixing the keyboard ASSY to the Control unit,
confirm that the three positioning holes of the keyboard
ASSY and the Control unit are not misaligned.
Positioning holes Control unit
Keyboard
ASSY
VOL/CH FPC
VOL /CH FPC
Universal
Connector FPC
Cord ASSY
■Changing the channel selector from 16-channel
operation to free
1. Remove the channel selector knob.
2. Remove the circular nut.
3. Remove the mechanical stopper.
4. Reassemble the circular nut and channel selector knob
that were removed in steps 1 and 2, in their original
positions.
Channel selector knob
(K29-9408-13)
Circular nut
(N14-0844-04)
Mechanical stopper
(D32-0446-14)

NX-300
9
3. Receiver System
3-1. RF Circuit
An incoming RF signal from the antenna terminal is
passed through the antenna switch (D606, 607, 709 ,711)
and then the bandpass filter (L721, L722). 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 (IC703). The signal is amplified by an RF ampli-
fier (Q705), and passed through the bandpass filter (L713,
714, 715). The resulting signal is applied to the first mixer
(Q703), where it is mixed with the first local oscillator signal
output from the frequency synthesizer to produce the first IF
(58.05MHz).
1. Overview
The NX-300 is a UHF portable transceiver designed to
operate in the frequency range of 450 to 520MHz. The unit
consists of receiver, transmitter, phase-locked loop (PLL)
frequency synthesizer, base band parts, power supply, and
control circuits.
2. Frequency Configuration
The receiver is a double-conversion superheterodyne
using the first intermediate frequency (IF) of 58.05MHz and
the second IF of 450kHz. Incoming signals from the antenna
are mixed with the local signal from the PLL circuit to pro-
duce the first IF of 58.05MHz. This is then mixed with the
57.6MHz second local oscillator output to produce the
450kHz second IF. The transmit signal frequency is gener-
ated by the PLL VCO, and modulated by the signal from the
DSP. It is then amplified and fed to the antenna.
CIRCUIT DESCRIPTION
Fig. 1 Frequency configuration
x3
57.6MHz
ANT
SW
RF
AMP
MIX
IF AMP
PLL
VCO
Base band circuit
ANT
TX/RX:450~520MHz
MCF
CF
450kHz
58.05MHz
19.2MHz
450~520MHz
391.95~
461.95MHz
PA
AMP
TX
AMP
VC
TCXO
AF
AMP
MIC
AMP
1st MIX SP
MIC
3-2. IF Circuit
The first IF signal is passed through a four-pole monolithic
crystal filter (XF700) to reject adjacent channel signals. The
filtered first IF signal is amplified by the first IF amplifier
(Q701) and then applied to the lF system IC (IC701). The IF
system IC provides a second mixer, AGC amplifier, and RSSI
(Received Signal Strength Indicator).
The second mixer mixes the first IF signal with the
57.6MHz of second local oscillator output and produces the
second IF signal of 450kHz.
The second IF signal is passed through the ceramic filter
(CF700) to reject the adjacent channel signal. The filtered
second IF signal is amplified by the AGC amplifier.
The signal from the AGC amplifier is input to the ASIC
(IC108) through the ceramic filter (CF701) and operational
amplifier (IC700 and IC410).
IC413
INAMT
IC713
(2/2) IC409
SWSW
IC701
MIX, AGC
EXAMT
IC704 IC707IC410
IC108
ASIC
IC102
DSP
IC408
IC700
IC412
IC703
AMT
VOL
CF701
BPF
IF AMP
Q701
MCF
XF700
BPF
Q700
2nd OSC
X500
19.2MHz
VC
TCXO x3 CF700
BPF
INT. SP
EXT. SP
RF AMP
Q705
LPF
ANT
ANT
SW
1st MIX
Q703
L612~L614
BPF
L713~L715
1st PLL OSC (PLL)
BPF
L721,L722
D606,D607
D709,D711
Fig. 2 RF and IF circuit

NX-300
10
Fig. 5 Audio band and Base band circuit
3-3. Audio Amplifier Circuit
Audio processing (high-pass filter, low-pass filter, de-em-
phasized and so on) at FM mode and decoding at NXDN
mode are processed by DSP. The audio signal from IC108
and IC102 goes through the amplifier (IC704). The signal then
goes through a mute switch (IC707), amplifier (IC713), elec-
tronic volume control (IC703), and AF amplifier (IC408).
While busy, AMT becomes Low to turn IC707 on, and the
signal is fed to the AF switch. While INAMT is High, the AF
switch (IC409) selects the internal speaker, and the audio
signal is fed to the internal audio power amplifier (IC413), and
output to the internal speaker. While EXAMT is High, the AF
switch (IC409) selects the external speaker, and the audio
signal is fed to the external audio power amplifier (IC412),
and output to the external speaker. The power supply for
IC413 and IC412 is turned on while INAMT or EXAMT is High.
The speaker is switched by the logic of the speaker
switching terminal SSW on the universal connector. When
the SP-MIC is not attached, SSW becomes High. IC108 de-
tects the logic of SSW and activates either INAMT or EXAMT.
3-4. Squelch Circuit
It amplifies the demodulated noise signal from IC108 after
filtering through the BPF circuit. Then, the amplified signal is
converted to a DC signal by the detection circuit. The con-
verted signal is fed back to IC108.
CIRCUIT DESCRIPTION
Fig. 3 Audio amplifier circuit
Q406
Q407
IC409
IC413
VDD
INT SP
SHUT DOWN
B
INAMT
EXAMT
AF signal
from IC408
IC412
VDD
EXT SP
SHUT DOWN
4. Transmitter System
4-1. Audio Band Circuit
The signal from the internal microphone goes through the
mute switch (Q5). When the SP-MIC is not attached, the
microphone switching terminal (MSW) on the universal con-
nector becomes High, and the mute switch (Q5) is turned on.
When the SP-MIC is attached, MSW is connected to GND
inside the SP-MIC. For this reason, Q5 is turned off, the inter-
nal microphone is muted, and only the input of the external
microphone is supplied to the microphone amplifier. The sig-
nal from the microphone goes through the mute switch
(Q707), and is amplified by IC716 (1/2) and limited by the AGC
circuit which is composed of D703, D704, Q705 and Q706.
4-2. Base Band Circuit
The audio signal output from the base band circuit is con-
verted to digital data with a sampling frequency of 48 kHz.
This digital data is sent to the DSP (IC102), and voice signals
of 300Hz or lower and frequencies of 3kHz or higher are cut
off and an audio range of 300Hz to 3kHz is extracted. The
audio signal is then pre-emphasized in FM mode and synthe-
sized with the signals, such as QT and DQT, as required, and
is then output from IC108. In Digital mode, the audio signal is
converted to the 4-Level FSK base band signal and output
from IC108. The DTMF and MSK base band signals are also
generated by the DSP and output by IC108.
LPF (IC705) works as a smoothing filter. The DAC (IC703)
assigns the base band signal to the VCO and VCTCXO (X500).
At this time, the level output according to the transmit carrier
is fine-adjusted according to each modulation method.
DET
IC108
IC702(1/2)
ASQAPC
ASQDET
LPF
IC711(2/2)
HPF
Q704
AMP
D705
RECT
IC711(1/2)
AMP
Fig. 4 Squelch circuit
SW
Q707 IC712
MM
AMP
IC710
(1/2)
LPF
IC706
LPF
IC705
(1/2)
AMP IC703
IC710
(2/2)
IC108
ASIC
IC102 DSP
LPF
IC705
(2/2)
AMP
IC501
AMP
VCTCXO
X500
VCO
IC504
AMP
AGC
IC716
(1/2)
D703,D704
Q705,Q706
SW
Q5
Q4
SW
MSW
SCSW
INT. MIC
EXT. MIC

NX-300
11
5. PLL Frequency Synthesizer
5-1. VCTCXO (X500)
VCTCXO (X500) generates a reference frequency of
19.2MHz for the PLL frequency synthesizer. This reference
frequency is applied to pin 9 of the PLL IC (IC502) and con-
nected to the IF circuit as a 2nd local signal through the
Tripler. The VCTCXO oscillation frequency is determined by
the DC voltage of the VC terminal. The VC voltage is fixed to
1.65V by R500 and R501, and supplied to the VC terminal
through IC501. The modulation signal is also fed to the VC
terminal through IC501
The frequency adjustment is achieved by switching the
ratio of the dividing frequency that is not adjusted by the DC
voltage impressed to the VC. The resolution of the adjusting
frequency is approximately 4Hz.
5-2. VCO
There is a RX VCO and a TX VCO.
The TX VCO (Q509) generates a transmit carrier and the
RX VCO (Q508) generates a 1st local signal. For the VCO os-
cillation frequency, the transmit carrier is 450 to 520 MHz and
the 1st local signal is 391.95 to 461.95MHz.
The VCO oscillation frequency is determined by one sys-
tem of operation switching terminal "T/R" and two systems of
voltage control terminals "C/V" and "V-assist".
The operation switching terminal, "T/R", is controlled by
the control line (/T_R) output from the ASIC (IC108). When
the /T_R logic is low, the VCO outputs the transmit carrier
and when it is high, it outputs a 1st local receive signal.
The voltage control terminals, "CV" and "V-assist", are con-
trolled by the PLL IC (IC502) and ASIC (IC108) and the output
frequency changes continuously according to the applied
voltage. For the modulation input terminal, "VCO_MOD", the
output frequency changes according to the applied voltage.
This is used to modulate the VCO output. "VCO_MOD" works
only when "/T_R" is low.
4-3. VOX
IC716 (2/2) amplifies the audio signal captured in the mi-
crophone. The signal is then converted into the DC voltage,
rectified by D706. The DC voltage activates the ASIC (IC108),
and the VOX starts.
4-4. Drive and Final Amplifier
The signal from the T/R switch (D601 is on) is amplified by
the drive amplifier (Q601,Q602 and Q603) to 25~27dBm. The
output of the drive amplifier is amplified by the RF power
amplifier (Q606) to 5.0W (1W when the power is low). The
RF power amplifier is MOS FET. The output of the RF power
amplifier is then passed through the harmonic filter (LPF) and
antenna switch (D606, D607 are on) and applied to the
antenna terminal.
4-5. APC Circuit
The APC circuit always monitors the current flowing
through the RF power amplifier (Q606) and keeps a constant
current. The voltage drop at R642, R645 and R647 is caused
by the current flowing through the RF power amplifier and
this voltage is applied to the differential amplifier (IC600 1/2).
IC600 (2/2) compares the output voltage of IC600 (1/2) with
the reference voltage from IC108, and the output of IC600
(2/2) controls the VGG of Q602, Q603 and Q606 to make the
both voltages the same. The change of power high/low is
carried out by the change of the reference voltage. Q607,
Q608 and Q610 are turned on and Q604 and Q605 are turned
off in transmit and the APC circuit is active.
CIRCUIT DESCRIPTION
Final
AMP
VDD
R642
VGG
IC600
(1/2)
From
T/R SW
(D601)
REF
VOL
(IC108)
+B
LPF
ANT
SW
D606,D607Q606
Drive
AMP
Q602
Pre
Drive
Q601
Pre-Final
AMP
Q603
ANT
R645
R647
IC600
(2/2)
Fig. 6 Drive and final amplifier and APC circuit

NX-300
12
6. Control Circuit
The control circuit consists of the ASIC (IC108) and its pe-
ripheral circuits. IC108 mainly performs the following;
1) Switching between transmission and reception by PTT
signal input.
2) Reading system, zone, 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.
6-1. ASIC
The ASIC (IC108) is a 32-bit RISC processor, equipped
with peripheral function and ADC/DAC.
This ASIC operates at 18.432MHz clock and 3.3V /1.5V
DC. It controls the flash memory, SRAM, DSP, the receive
circuit, the transmitter circuit, the control circuit, and the dis-
play circuit and transfers data to or from an external device.
CIRCUIT DESCRIPTION
5-3. PLL IC (IC502)
The PLL IC compares the differences in phases of the
VCO oscillation frequency and the VCTCXO reference
frequency, returns the difference to the VCO CV terminal and
realizes the "Phase Locked Loop" for the return control. This
allows the VCO oscillation frequency to accurately match
(lock) the desired frequency.
When the frequency is controlled by the PLL, the fre-
quency convergence time increases as the frequency differ-
ence increases when the set frequency is changed. To
supplement this, the ASIC is used before control by the PLL
IC to bring the VCO oscillation frequency close to the desired
frequency. As a result, the VCO CV voltage does not change
and is always stable at approximately 2.5V.
The desired frequency is set for the PLL IC by the ASIC
(IC108) through the 3-line "SDO1", "SCK1", "/PCS_RF" serial
bus. Whether the PLL IC is locked or not is monitored by the
ASIC through the “PLD” signal line. If the VCO is not the
desired frequency (unlock), the "PLD" logic is low.
5-4. Local Switch (D600, D601)
The connection destination of the signal output from the
buffer amplifier (Q600) is changed with the diode switch
(D601) that is controlled by the transmission power supply,
50T, and the diode switch (D600) that is controlled by the
receive power supply, 50R. If the 50T logic is high, it is con-
nected to a send-side pre-drive (Q601). If the 50T logic is low,
it is connected to a receive-side mixer (Q703).
Loop
Filter
BUFF
AMP
BUFF
AMP
Ripple
Filter
VCO
150C
VC
TCXO
PLL
IC
IC502 Q512
Q508,Q509
D506,D507,D510,D511
D514~D517,D519
BUFF
AMP
Q600
LPF
Q505
SDO1
SCK1
/PCS_RF
X500
19.2MHz
T/R
SW
D600,D601
50C
50C
to TX stage
50T
50R
to 1st Mixer
IC504(1/2)
Q504
Q503
IC503
CV
VCO_MOD
ASSIST
Fig. 7 PLL block diagram

NX-300
13
CIRCUIT DESCRIPTION
6-2. Memory Circuit
The memory circuit consists of the ASIC (IC108) and the
SRAM(IC103) and flash memory (IC101). The flash memory
has capacity of 32M-bit that contains the transceiver control
program for the ASIC and stores the data. It also stores the
data for transceiver channels and operating parameter that
are written by the FPU. This program can be easily written
from external devices. The SRAM has capacity of 1M-bit that
contains work area and data area.
■Flash memory
Note: The flash memory stores the data that is written by the
FPU (KPG-111D), tuning data (Deviation, Squelch, etc.) ,and
firmware program (User mode, Test mode, Tuning mode,
etc.). This data must be rewritten when replacing the flash
memory.
■SRAM (Static memory)
Note: The SRAM has temporary data area and work area.
When the power supply is off, it is backed up by an internal
secondary lithium battery. Therefore, the saved data is not
lost.
■Real-time clock
The clock function is based on real-time clock IC (IC106).
When the power supply is off, it is backed up by an internal
secondary lithium battery
6-3. LCD
The LCD is controlled using the bus lines on the connector
(CN1) of the Control unit (X53-426). It corrects the LCD con-
trast voltage using IC1.
6-4. Key Detection Circuit
Keys are detected using the key scan circuit in IC108. The
/KEYI* signals that are normally pulled down go high when
any key is pressed.
6-5. Low Battery Warning
The battery voltage is divided using R444 and R445 and is
detected by the ASIC (IC108). When the battery voltage falls
below the voltage set by the Low battery warning adjust-
ment, the red LED blinks 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 stops.
6-6. DSP
The DSP circuit consists of a DSP (IC102) and processes
the base band signal. The DSP operates on an external clock
of 18.432MHz (the same as the IC108), the I/O section oper-
ates at 3.3V and the core section operates at 1.5V. The DSP
carries out the following processes:
•4Level FSK processing
•Analog FM pre-emphasis/de-emphasis
•Vocoder processing between audio codec and modula-
tion/demodulation
•CAI processing, such as error correction encoding
•QT/DQT encoding/decoding
•LTR encoding/decoding
•DTMF encoding/decoding
•MSK encoding/decoding
•2-tone encoding/decoding
•Compressor/expander processing
•Voice scrambler processing
• Transmit/receive audio filtering processing
•Microphone amplifier AGC processing
•Audio mute processing
•Modulation level processing
7. Power Supply Circuit
The battery voltage (+B) is provided from the battery
terminal on the TX/RX unit (X57). The battery voltage passes
through the 2.5A fuse (F900), and goes to the RF final ampli-
fier, AVR ICs (IC902, IC903), and Control unit (X53-426).
In the control unit, +B is connected to the DC/DC (IC407),
AVR ICs (IC411, IC708, IC416), and voltage detector IC
(IC414). The voltage detector watches the battery voltage.
If the battery voltage is 5.6V or higher, the detector outputs
High. While the output of IC414 is High, IC416 and Q409
provide 3.1V (31BU) to the backup-section.
When the VOL SW is turned on, SB1 becomes high (bat-
tery voltage). The DC/DC (IC407) operates if both SB1 and
the output of the detector are high. IC407 outputs 3.8V and it
activates IC404 (33M), IC405 (15M), and IC406 (33A). As a
result, the ASIC and DSP operate.
The SBC signal becomes High after the ASIC operates,
IC708 (5A), Q403 on the Control unit (SB2) and Q901 on the
TX-RX unit (SB3) are turned on. IC901 and IC903 operate by
turning on these AVR ICs and FET switches.
The 5UC signal becomes High when an option is installed
on the universal connector. Then IC411 (50U) operates.
When the /SAVE signal becomes High, IC902 (50C) oper-
ates. The output of IC902 is connected to three FET switches
(Q902, Q903, Q905). When the SBC signal becomes High,
IC903 (33C) operates. The FET switches are controlled by the
CPU. Q905 (50T) is turned on in transmit mode. Q902 (50R)
and Q903 (50IF) are turned on in receive mode.
When the VOL SW is turned off the /PSW signal
becomes Low. After detecting the /PSW signal, the ASIC
changes SBC signal to Low. Then the power supplies except
IC416 (31BU) stop.
Low battery warning Battery condition
The red LED blinks during The battery voltage is low but
transmission. the transceiver is still usable.
The red LED blinks and the The battery voltage is low
warning tone beeps while and the transceiver is not
the PTT switch is pressed. usable to make calls.

NX-300
14
CIRCUIT DESCRIPTION
Q905
50T SW
Q902
50R SW
Q903
50IF SW
IC902
AVR
/SAVE
/5TC
5RC
IFC
SBC
CN900
50R
50IF
+B
50C
50T
RX circuit
RF Final AMP
APC
VCO
TX circuit
IF circuit
IC901
DC/DC
150C Assist, Tune
IC403
DC/DC
-10V LCD Bias
31BU SRAM, RTC
IC903
AVR IC
33C PLL, VCTCXO
Q901
SB3 SW
SB3 TX/Busy LED
F900
2.5A
IC411
AVR IC
5UC 50U Universal
IC416
AVR IC Q409
31BU
IC708
AVR IC
5A Option
Q403
SB2 SW
SBC SB2 BackLight
Key Light
33M
SB1
ASIC, DSP I/O,
Flach, LCD DRV
IC407
DC/DC IC404
AVR
VOL SW
15M ASIC, DSP core
IC405
AVR
33A
/PSW
/BINT
ASIC Analog,
Audio
IC406
AVR
IC414
Detect
Q408
AND
D408
OR
D412
OR
Q402
Lvl Conv
IC108
ASIC
Q401
Lvl Conv
CN404
Control unit (X53)
SBC
TX-RX unit (X57)
Fig. 8 Power supply circuit
8. Signaling Circuit
8-1. Encode (QT/DQT/LTR/DTMF/2-tone/MSK)
Each signaling data signal of QT, DQT, LTR, DTMF, 2-tone
and MSK is generated by the DSP circuit, superposed on a
modulation signal and output from IC108. The modulation
balance of the QT/DQT/LTR signal is adjusted by the D/A
converter(IC703) and the resulting signal is routed to the
modulation input of the VCO and VCXO (X500). Each devia-
tion of the TX QT, DQT, LTR, DTMF and MSK tone is adjusted
by changing the output level of IC108 and the resulting signal
is routed to the VCO and VCXO. The RX DTMF tone is routed
to the receive audio signal system, and is output from the
speaker.
8-2. Decode (QT/DQT/LTR/DTMF/2-tone/MSK)
The audio signal is removed from the FM detection signal
sent to the DSP circuit and the resulting signal is decoded.
9. Compander Circuit
The term “compander” means compressor and expander.
The compander reduces noise by utilizing a compressor and
an expander. The transceiver contains a DSP(IC102) to per-
form this operation. The transceiver compander can be
turned on or off using the FPU.

NX-300
15
COMPONENTS DESCRIPTION
Control unit (X53-4260-XX)
Ref. No. Part Name Description
IC1 IC LCD contrast
IC101 IC FLASH ROM
IC102 IC DSP
IC103 IC SRAM
IC104 IC 2 input AND gate
IC105 IC Reset
IC106 IC RTC
IC107 IC Buffer
IC108 IC ASIC
IC109 IC 2 input AND gate
IC401,402 IC Bus switch
IC403 IC Voltage doubling inverter
IC404 IC Voltage regulator (33M)
IC405 IC Voltage regulator (15M)
IC406 IC Voltage regulator (33A)
IC407 IC DC/DC converter
IC408 IC AF AMP
IC409 IC AF switch
IC410 IC IF AMP
IC411 IC Voltage regulator (50U)
IC412,413 IC Audio AMP
IC414 IC Reset
IC415 IC 2 input AND gate
IC416 IC Voltage regulator
IC417,418 IC Dual bus buffer
IC701 IC I/O control
IC702 IC APC LPF
IC703 IC D/A converter
IC704 IC RX AF LPF
IC705 IC Modulation LPF
IC706 IC MIC AMP
IC707 IC RX AF switch
IC708 IC Voltage regulator (5A)
IC709 IC Sidetone mute
IC710 IC MOD/MIC summing AMP
IC711 IC SQL BPF/SQL DC AMP
IC712 IC MIC switch
IC713 IC 1.65V REF/RX summing AMP
IC714 IC OPT switch
IC715,716 IC VOX AMP
Q1,2 Transistor LCD backlight switch
Q3 FET LCD backlight switch
Q4 FET MIC shift control
Q5 FET MIC shift switch
Q101,102 Transistor 12key backlight switch
Q103 FET 12key backlight switch
Q401,402 FET Level converter
Ref. No. Part Name Description
Q403 Transistor SB2 switch
Q404 FET SB2 switch control
Q405 FET AF AMP switch
Q406,407 Transistor Voltage regulator (AF AMP)
Q408,409 Transistor DC switch
Q410 FET DC switch
Q411 FET Level converter
Q412 FET DC switch
Q413~415 Transistor DC switch
Q701 Transistor OPT switch
Q702 FET Tone switch
Q703 FET W/N noise switch
Q704 Transistor SQL noise AMP
Q705,706 Transistor MIC AGC
Q707 FET MIC mute
D1,2 LED 12key backlight
D3,4 LED LCD backlight
D5,6 LED 12key backlight
D7,8 LED LCD backlight
D9,10 LED 12key backlight
D11 Diode LCD backlight switch
D12~16 Diode Reverse current prevention
D17~19 Zener diode Surge absorption
D20 Zener diode PTT RF OPT control
D21 Zener diode EMC MSW SSW control
D22 Diode RXD control
D23 Diode TXD control
D101 Diode 12key backlight switch
D102 Diode Reverse current prevention
D401~404 Diode 12key control
D405,406 Diode DC/DC converter
D407 Diode Reverse current prevention
D408 Diode DC/DC converter control
D409,410 Diode SP control
D411 Diode RTC BATT control
D412 Diode DC switch control
D413 Diode RTC BATT control
D414 Diode TX LED switch
D415 Diode RX LED switch
D416 Diode 33M control
D417 Diode 33A control
D701 Diode 5A switch
D702 Diode PLD control
D703,704 Diode Detector
D705 Diode Noise detector
D706 Diode Detector
D707 Diode VOX

NX-300
16
COMPONENTS DESCRIPTION
TX-RX unit (X57-7370-10)
Ref. No. Part Name Description
IC404 IC OP AMP (RSSI/VAGC)
IC500 IC Temperature sensor
IC501 IC DC AMP for TCXO MOD
IC502 IC PLL IC
IC503 IC DC AMP for VCO tune
IC504 IC OP AMP (VCO MOD/APC)
IC600 IC Auto power control
IC700 IC Buffer
IC701 IC FM IC
IC702,703 IC DC AMP for BPF
IC900 IC 50T control
IC901 IC DC/DC converter
IC902 IC Voltage regulator (50C)
IC903 IC Voltage regulator (33C)
Q503 Transistor Ripple filter
Q504 FET Buffer AMP
Q505 Transistor Buffer AMP
Q507 Transistor Ripple filter
Q508,509 FET VCO oscillation
Q510,511 FET T/R switch
Q512,600 Transistor Buffer AMP
Q601 Transistor RF AMP
Q602 FET RF AMP
Q603 FET RF drive AMP
Q604 Transistor APC switch
Q605 FET APC switch
Q606 FET RF final AMP
Q607 Transistor APC switch
Q608 FET APC switch
Q610 Transistor APC switch
Q700 Transistor 2nd Local buffer AMP
Q701 Transistor IF AMP
Q703 FET Mixer
Q704 Transistor Ripple filter
Q705 FET RF AMP
Q706 FET RF AGC
Q900 Transistor TX/RX LED switch
Q901 FET SB3 switch
Q902 FET 50R switch
Q903 FET 50IF switch
Q904 FET DC/DC converter switch
Q905 Transistor 50T switch
D501 Diode Ripple filter
D505 Diode Bypass diode
Ref. No. Part Name Description
D506,507, Variable Frequency control
D510,511 capacitance diode
D514~517 Variable Frequency control
capacitance diode
D518 Diode Ripple filter
D519 Variable TX modulation
capacitance diode
D600,601 Diode Local switch
D604 Zener diode APC switch
D605 Zener diode APC protect
D606,607 Diode Antenna switch
D700 Diode Ripple filter
D702~704 Variable Vari-cap tune
capacitance diode
D705 Diode RF AGC
D706,708 Variable Vari-cap tune
capacitance diode
D709 Diode Antenna switch
D710 Variable Vari-cap tune
capacitance diode
D711 Diode Antenna switch
D900 LED TX/RX LED
D901 Diode Reverse protection
D902 Diode 50T control

∗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
Parts No. Description Address New
parts
Destination Destination
NX-300
Ref. No. Parts No. Description
Address New
parts
Ref. No.
NX-300
PARTS LIST
17
NX-300 (Y50-6120-XX)
CONTROL UNIT (X53-4260-XX)
59 1A ∗K29-9406-03 BUTTON KNOB(SIDE KEY)
60 1B ∗K29-9407-03 KNOB(VOL)
61 1B ∗K29-9408-13 KNOB(CH)
A1B,1D ∗N08-0564-04 DRESSED SCREW ACCESSORY
B3B N09-2426-14 HEXAGON HEAD SCREW(BATT -)
C3A N09-2440-15 SPECIAL SCREW(CASE)
D2A,2B ∗N09-6549-04 STEPPED SCREW(FG-SP HOLDER)
E2B,3A ∗N09-6554-05 PAN HEAD SCREW(ANT/OP BOARD)
F2B∗N14-0844-04 CIRCULAR NUT(VOL,CH)
G1C N30-3008-60
PAN HEAD MACHINE SCREW(BELT CLIP)
H 1A,2A,2B N83-2005-48 PAN HEAD TAPTITE SCREW(PCB)
64 1A ∗S79-0472-05 KEYBOARD ASSY(12KEY) K3
65 2A T07-0755-15 SPEAKER
66 2A T91-0575-05 MIC ELEMENT
67 2A W09-0971-05 LITHIUM CELL
68 3A ∗X41-3710-10 SWITCH UNIT(PTT FPC)
69 2B ∗X41-3720-10 SWITCH UNIT(6KEY FPC)
70 2A ∗X42-3340-10 CORD ASSY(50PIN FPC)
72 2B ∗X60-3860-10 TERMINAL ASSY(SMA)
D1 -10 B30-2215-05 LED K3
D3 ,4 B30-2215-05 LED K
D7 ,8 B30-2215-05 LED K
C1 CK73HB1A104K CHIP C 0.10UF K
C2 -6 CK73GB1E105K CHIP C 1.0UF K
C7 ,8 CK73HB1A104K CHIP C 0.10UF K
C10 CK73HB1A104K CHIP C 0.10UF K
C11 CK73HB0J105K CHIP C 1.0UF K
C12 -15 CK73HB1H471K CHIP C 470PF K
C16 ,17 CC73HCH1H101J CHIP C 100PF J
C23 -27 CK73HB1H102K CHIP C 1000PF K
C28 -34 CC73HCH1H101J CHIP C 100PF J
C35 CK73HB1H102K CHIP C 1000PF K
C36 CK73HB1E682K CHIP C 6800PF K
C37 CK73HB1H102K CHIP C 1000PF K
C38 CC73HCH1H101J CHIP C 100PF J
C40 CC73HCH1H221J CHIP C 220PF J
C41 CC73HCH1H101J CHIP C 100PF J
C101-104 CK73HB1A104K CHIP C 0.10UF K
C105 CK73HB0J105K CHIP C 1.0UF K
C106 CK73HB1E103K CHIP C 0.010UF K
C107 CK73HB1A104K CHIP C 0.10UF K K
C107,108 CK73HB1A104K CHIP C 0.10UF K K3
C109,110 CK73HB1H102K CHIP C 1000PF K
C111-113 CK73HB1A104K CHIP C 0.10UF K
C114 CK73HB0J105K CHIP C 1.0UF K K3
C115 CK73HB1H471K CHIP C 470PF K K3
C116,117 CK73HB1A104K CHIP C 0.10UF K
C118,119 CK73HB0J105K CHIP C 1.0UF K
C120,121 CK73HB1A104K CHIP C 0.10UF K
C122-124 CK73HB1E103K CHIP C 0.010UF K
C130 CK73HB1E103K CHIP C 0.010UF K
11B∗A02-4002-13 PLASTIC CABINET(6KEY) K
21A∗A02-4003-13 PLASTIC CABINET(18KEY) K3
32B∗A62-1156-02 PANEL(TOP)
41B∗B09-0712-03 CAP ACCESSORY
51A∗B11-1853-24 FILTER(LCD)
61A∗B11-1854-02 ILLUMINATION GUIDE(LCD)
73B∗B11-1855-04 ILLUMINATION GUIDE(TX/BUSY)
81A∗B38-0923-05 LCD ASSY
91A∗B42-7296-04 STICKER
10 1B ∗B43-1606-04 BADGE
11 2D ∗B62-2014-00 INSTRUCTION MANUAL
12 2B ∗D32-0446-14 STOPPER(16CH)
14 3A ∗E29-1221-04 RELAY HARDWARE(VCO-CHASSIS)
15 2A ∗E29-1220-04 RELAY HARDWARE(VCO-PCB)
16 3B ∗E58-0532-05 RECTANGULAR RECEPTACLE(SP/MIC)
17 3B ∗E72-0425-03 TERMINAL BLOCK
18 3A ∗F07-1931-04 COVER(OP BOARD)
19 2A ∗G02-1836-13 EARTH SPRING(SP)
20 1A ∗G10-1373-04 FIBROUS SHEET(SP)
21 2B ∗G10-1384-04 FIBROUS SHEET(TOP PANEL)
23 2A G11-4272-14 RUBBER CUSHION(SP)
24 3A G11-4331-04 SHEET(AIR)
25 3A ∗G11-4428-04 SHEET(PTT)
26 3A ∗G11-4429-04 RUBBER SHEET(FET)
27 3A ∗G11-4440-04 SHEET(AIR)
29 2A ∗G11-4458-14 SHEET(SP)
30 2A ∗G11-4459-04 SHEET(TX-RX PCB)
31 2A G13-2129-14 CUSHION(TX-RX PCB)
33 2A ∗G13-2258-04 CUSHION(50PIN FPC)
34 3B ∗G53-1762-02 PACKING(TOP)
35 3B ∗G53-1763-03 PACKING(TERMINAL BLOCK)
36 3A ∗G53-1764-03 PACKING(OP BOARD)
37 1B ∗G53-1765-11 PACKING(6KEY) K
38 1A ∗G53-1766-11 PACKING(18KEY) K3
39 2B ∗G53-1768-04 PACKING(VOL,CH O-RING)
40 1B ∗G53-1769-04 PACKING(CAP)
41 2B G53-1792-04 PACKING(SMA O-RING)
42 2A ∗J19-5505-11 HOLDER(FG-SP)
43 2B ∗J19-5506-03 HOLDER(VOL,CH)
44 2A ∗J19-5507-02 HOLDER(OP BOARD)
45 2B ∗J21-8579-04
MOUNTING HARDWARE(FG-SP HOLDER)
46 1C J29-0730-05 BELT CLIP ACCESSORY
47 2B ∗J30-1296-04 SPACER(VOL)
48 2B ∗J87-0006-05 FPC(LEAD FREE/VOL,CH)
49 3B ∗J87-0007-05 FPC(LEAD FREE/UNIVERSAL)
50 2B J99-0390-04 ADHESIVE SHEET(6KEY FPC)
52 3A ∗J99-0711-04 ADHESIVE SHEET(PTT FPC)
53 2B ∗J99-0712-14 ADHESIVE SHEET(6KEY FPC)
54 1A ∗J99-0714-04 ADHESIVE SHEET(LCD)
55 3B ∗J99-0715-08 ADHESIVE SHEET(UNIVERSAL)
56 3B ∗J99-0725-04 ADHESIVE SHEET(TERMINAL BLOCK)
57 3A ∗K25-2001-03 PUSH KNOB(PTT)
58 1A ∗K29-9405-03 KNOB(PTT)
CONTROL UNIT (X53-4260-XX) -10 :K -11 :K3

NX-300
PARTS LIST
18
Ref. No. Parts No. Description Address New
parts
Ref. No. Parts No. Description Address New
parts Destination Destination
CONTROL UNIT (X53-4260-XX)
C131 CK73HB1A104K CHIP C 0.10UF K
C133 CS77CP0J100M CHIP TNTL 10UF 6.3WV
C134 CK73HB1E103K CHIP C 0.010UF K
C135 CK73HB1H102K CHIP C 1000PF K
C136 CK73HB1E103K CHIP C 0.010UF K
C137 CK73GB1E105K CHIP C 1.0UF K
C138-140 CK73HB1A104K CHIP C 0.10UF K
C141 CC73HCH1H101J CHIP C 100PF J
C142 CS77CP0J100M CHIP TNTL 10UF 6.3WV
C143 CK73HB1E103K CHIP C 0.010UF K
C144 CK73GB1E105K CHIP C 1.0UF K
C145-148 CK73HB1A104K CHIP C 0.10UF K
C149 CK73HB1E103K CHIP C 0.010UF K
C150 CK73GB1E105K CHIP C 1.0UF K
C151-155 CK73HB1A104K CHIP C 0.10UF K
C156,157 CK73HB1H102K CHIP C 1000PF K
C158 CK73HB1E103K CHIP C 0.010UF K
C159 CK73HB1A104K CHIP C 0.10UF K
C160,161 CK73HB1E682K CHIP C 6800PF K
C401,402 CK73HB1A104K CHIP C 0.10UF K
C403-405 CS77AP1C2R2M CHIP TNTL 2.2UF 16WV
C406 CK73HB0J105K CHIP C 1.0UF K
C407,408 CK73HB1H102K CHIP C 1000PF K
C409-412 CK73HB0J105K CHIP C 1.0UF K
C413 ∗CK73FB1A106K CHIP C 10UF K
C414 CK73HB0J105K CHIP C 1.0UF K
C415 CS77AP1A100M CHIP TNTL 10UF 10WV
C416 ∗CK73FB1A106K CHIP C 10UF K
C417 CC73HCH1H221J CHIP C 220PF J
C418 CK73HB1E103K CHIP C 0.010UF K
C419 ∗CK73FB1E475K CHIP C 4.7UF K
C420 CK73HB1E103K CHIP C 0.010UF K
C421 CK73HB1E682K CHIP C 6800PF K
C422 CC73HCH1H100C CHIP C 10PF C
C424,425 CK73HB1A104K CHIP C 0.10UF K
C427 CK73HB1E103K CHIP C 0.010UF K
C428 CC73HCH1H030C CHIP C 3.0PF C
C429,430 CK73HB1A104K CHIP C 0.10UF K
C431 ∗CK73FB1A106K CHIP C 10UF K
C432 CK73HB1E103K CHIP C 0.010UF K
C433 ∗CK73FB1A106K CHIP C 10UF K
C434 CK73HB1E103K CHIP C 0.010UF K
C435-438 CK73HB1A224K CHIP C 0.22UF K
C439,440 CK73HB1A104K CHIP C 0.10UF K
C441 CK73GB1E105K CHIP C 1.0UF K
C442 CK73HB1H471K CHIP C 470PF K
C443,444 CK73HB1E103K CHIP C 0.010UF K
C445 CK73HB1H102K CHIP C 1000PF K
C446 CK73GB1E105K CHIP C 1.0UF K
C447 CK73HB1H102K CHIP C 1000PF K
C448-450 CK73HB0J105K CHIP C 1.0UF K
C451-453 CK73HB1E103K CHIP C 0.010UF K
C454 CK73GB1E105K CHIP C 1.0UF K
C455-457 CK73HB1H471K CHIP C 470PF K
C459 CK73HB1H471K CHIP C 470PF K
C460 CK73HB1E682K CHIP C 6800PF K
C461-463 CK73HB1H471K CHIP C 470PF K
C464 CK73HB1E103K CHIP C 0.010UF K
C465 CK73HB1H102K CHIP C 1000PF K
C466 CK73HB1E682K CHIP C 6800PF K
C467,468 CK73HB1E103K CHIP C 0.010UF K
C469,470 CK73HB1H102K CHIP C 1000PF K
C701 CK73HB1A104K CHIP C 0.10UF K
C703 CK73GB0J475K CHIP C 4.7UF K
C704,705 CK73HB1A104K CHIP C 0.10UF K
C706 CC73HCH1H680J CHIP C 68PF J
C707 CC73HCH1H270J CHIP C 27PF J
C708 CK73HB1A104K CHIP C 0.10UF K
C709 CK73HB0J105K CHIP C 1.0UF K
C710 CK73HB1E103K CHIP C 0.010UF K
C711 CK73HB1A104K CHIP C 0.10UF K
C712 CK73HB1E103K CHIP C 0.010UF K
C713 CK73HB1H332K CHIP C 3300PF K
C714 CK73HB1H122K CHIP C 1200PF K
C715 CK73HB1A104K CHIP C 0.10UF K
C716 CK73HB1H681K CHIP C 680PF K
C717 CK73HB1E103K CHIP C 0.010UF K
C718 CK73HB1H152K CHIP C 1500PF K
C719 CK73HB1A104K CHIP C 0.10UF K
C720 CK73HB1E103K CHIP C 0.010UF K
C721 CK73HB1A104K CHIP C 0.10UF K
C722 CK73HB1E103K CHIP C 0.010UF K
C723 CK73HB1A104K CHIP C 0.10UF K
C724 CK73HB1E103K CHIP C 0.010UF K
C725 CC73HCH1E181J CHIP C 180PF J
C726,727 CK73HB1A104K CHIP C 0.10UF K
C728 CK73HB1H331K CHIP C 330PF K
C730 CK73HB1H331K CHIP C 330PF K
C731,732 CK73HB1E103K CHIP C 0.010UF K
C734 CK73HB1H102K CHIP C 1000PF K
C735 CK73HB1H122K CHIP C 1200PF K
C736,737 CK73HB1A104K CHIP C 0.10UF K
C738 CK73HB1H102K CHIP C 1000PF K
C739 CK73HB1E682K CHIP C 6800PF K
C740 CK73HB1H102K CHIP C 1000PF K
C742 CK73GB1E105K CHIP C 1.0UF K
C743 CK73HB0J105K CHIP C 1.0UF K
C744-746 CK73HB1E103K CHIP C 0.010UF K
C747,748 CK73HB1A104K CHIP C 0.10UF K
C749,750 CC73HCH1H470J CHIP C 47PF J
C751 CK73GB1E105K CHIP C 1.0UF K
C752,753 CC73HCH1H101J CHIP C 100PF J
C755 CC73HCH1H470J CHIP C 47PF J
C756 CK73HB1A104K CHIP C 0.10UF K
C757,758 CK73GB0J475K CHIP C 4.7UF K
C759,760 CK73HB1E103K CHIP C 0.010UF K
C761 CC73HCH1H100D CHIP C 10PF D
C762 CK73HB1A104K CHIP C 0.10UF K
C763 CK73HB1E103K CHIP C 0.010UF K
C764 CK73HB1H102K CHIP C 1000PF K
C765-767 CK73HB1A104K CHIP C 0.10UF K
C768 CK73HB1H102K CHIP C 1000PF K
C771 CK73HB1A224K CHIP C 0.22UF K
C772 CK73HB1E103K CHIP C 0.010UF K
C775 CC73HCH1H470J CHIP C 47PF J
C777 CK73HB1H102K CHIP C 1000PF K
C778 CK73HB0J105K CHIP C 1.0UF K
C779 CK73HB1E103K CHIP C 0.010UF K

NX-300
PARTS LIST
Ref. No. Parts No. Description Address New
parts
Ref. No. Parts No. Description Address New
parts Destination Destination
CONTROL UNIT (X53-4260-XX)
19
C780 CK73HB1A224K CHIP C 0.22UF K
C781,782 CK73HB0J105K CHIP C 1.0UF K
C785 CK73HB1A224K CHIP C 0.22UF K
C786 CK73HB1E103K CHIP C 0.010UF K
C787 CK73HB0J105K CHIP C 1.0UF K
C788 CC73HCH1H150J CHIP C 15PF J
C789 CC73HCH1H680J CHIP C 68PF J
C790 CK73HB1A104K CHIP C 0.10UF K
C791 CK73HB1A393K CHIP C 0.039UF K
C792 CK73HB0J105K CHIP C 1.0UF K
C793,794 CK73HB1A104K CHIP C 0.10UF K
C795 CK73HB1E103K CHIP C 0.010UF K
C796 CK73HB1A104K CHIP C 0.10UF K
C797 CK73HB0J105K CHIP C 1.0UF K
C798 CS77AP1A100M CHIP TNTL 10UF 10WV
C799 CK73HB1A104K CHIP C 0.10UF K
C800 CK73HB1H152K CHIP C 1500PF K
C801 CK73HB1C223K CHIP C 0.022UF K
C802 CK73HB1E103K CHIP C 0.010UF K
C803 CK73HB1H102K CHIP C 1000PF K
C804 CC73HCH1H470J CHIP C 47PF J
CN1 ∗E40-6755-05 FLAT CABLE CONNECTOR
CN22 ∗E23-1325-05 TERMINAL
CN23 ∗E40-6758-05 PIN ASSY
CN24 ∗E23-1325-05 TERMINAL
CN403 ∗E40-6813-05 PIN ASSY
CN404 ∗E40-6421-15 PIN ASSY
CN405 ∗E40-6754-05 FLAT CABLE CONNECTOR
CN701 E40-6586-05 SOCKET FOR PIN ASSY
CN710 ∗E40-6757-05 PIN ASSY
F701 F53-0360-05 FUSE(0.25A)
CN401 J19-5386-05 HOLDER(LITHIUM CELL)
L1 ,2 L92-0408-05 CHIP FERRITE
L3 L92-0140-05 CHIP FERRITE
L4 -7 L92-0408-05 CHIP FERRITE
L8 L92-0140-05 CHIP FERRITE
L101,102 L92-0408-05 CHIP FERRITE
L401 ∗L33-1496-05 SMALL FIXED INDUCTOR
L402 L92-0467-05 CHIP FERRITE
L403 ∗L92-0466-05 CHIP FERRITE
L409,410 L92-0467-05 CHIP FERRITE
L701 L92-0140-05 CHIP FERRITE
L702 L92-0162-05 BEADS CORE
L704-709 L92-0162-05 BEADS CORE
L710-712 L92-0444-05 CHIP FERRITE
L713 L92-0163-05 BEADS CORE
L714-717 L92-0444-05 CHIP FERRITE
X101 L77-1802-05 CRYSTAL RESONATOR(32768HZ)
X102 ∗L77-3015-05 TCXO(18.432MHZ)
R1 RK73HB1J105J CHIP R 1.0M J 1/16W
R2 RK73HB1J104J CHIP R 100K J 1/16W
R3 RK73HB1J123J CHIP R 12K J 1/16W
R4 -10 RK73HB1J103J CHIP R 10K J 1/16W
R11 RK73HB1J104J CHIP R 100K J 1/16W
R12 RK73HB1J103J CHIP R 10K J 1/16W
R14 RK73HB1J472J CHIP R 4.7K J 1/16W
R15 RK73HB1J000J CHIP R 0.0 J 1/16W
R16 RK73HB1J331J CHIP R 330 J 1/16W
R17 RK73HB1J000J CHIP R 0.0 J 1/16W
R18 RK73HB1J822J CHIP R 8.2K J 1/16W
R19 RK73HB1J471J CHIP R 470 J 1/16W
R20 RK73HB1J102J CHIP R 1.0K J 1/16W
R21 RK73HB1J122J CHIP R 1.2K J 1/16W
R22 -24 RK73HB1J102J CHIP R 1.0K J 1/16W
R25 RK73HB1J122J CHIP R 1.2K J 1/16W
R26 RK73HB1J102J CHIP R 1.0K J 1/16W
R27 RK73HB1J104J CHIP R 100K J 1/16W
R28 ,29 RK73HB1J102J CHIP R 1.0K J 1/16W
R30 RK73HB1J101J CHIP R 100 J 1/16W
R31 RK73HB1J102J CHIP R 1.0K J 1/16W
R32 -35 RK73HB1J101J CHIP R 100 J 1/16W
R40 RK73HB1J000J CHIP R 0.0 J 1/16W
R101,102 RK73HB1J474J CHIP R 470K J 1/16W
R103 RK73HB1J102J CHIP R 1.0K J 1/16W
R105 RK73HB1J104J CHIP R 100K J 1/16W
R106 RK73HB1J472J CHIP R 4.7K J 1/16W K3
R107 RK73HB1J104J CHIP R 100K J 1/16W
R108 RK73HB1J474J CHIP R 470K J 1/16W K3
R110,111 RK73HB1J104J CHIP R 100K J 1/16W
R112 RK73HB1J000J CHIP R 0.0 J 1/16W K3
R113 RK73HB1J104J CHIP R 100K J 1/16W
R114 RK73HB1J331J CHIP R 330 J 1/16W K3
R115 RK73HB1J104J CHIP R 100K J 1/16W
R116 RK73HB1J473J CHIP R 47K J 1/16W
R117 RK73HB1J000J CHIP R 0.0 J 1/16W K3
R118 RK73HB1J473J CHIP R 47K J 1/16W
R119 RK73HB1J104J CHIP R 100K J 1/16W
R120 RK73HB1J474J CHIP R 470K J 1/16W
R121-123 RK73HB1J104J CHIP R 100K J 1/16W
R126 RK73HB1J101J CHIP R 100 J 1/16W
R127,128 RK73HB1J000J CHIP R 0.0 J 1/16W
R129-131 RK73HB1J101J CHIP R 100 J 1/16W
R132,133 RK73HB1J104J CHIP R 100K J 1/16W
R135-137 RK73HB1J104J CHIP R 100K J 1/16W
R138 RK73HB1J473J CHIP R 47K J 1/16W
R139 RK73HB1J104J CHIP R 100K J 1/16W
R140 RK73HB1J000J CHIP R 0.0 J 1/16W
R141-143 RK73HB1J104J CHIP R 100K J 1/16W
R144 RK73HB1J471J CHIP R 470 J 1/16W
R145-147 RK73HB1J104J CHIP R 100K J 1/16W
R148 RK73HB1J151J CHIP R 150 J 1/16W
R149 RK73HB1J000J CHIP R 0.0 J 1/16W
R150 RK73HB1J102J CHIP R 1.0K J 1/16W
R153,154 RK73HB1J104J CHIP R 100K J 1/16W
R155 RK73HB1J473J CHIP R 47K J 1/16W
R156,157 RK73HB1J472J CHIP R 4.7K J 1/16W
R158,159 RK73HB1J220J CHIP R 22 J 1/16W
R160,161 RK73HB1J000J CHIP R 0.0 J 1/16W
R162 RK73HB1J474J CHIP R 470K J 1/16W
R163 RK73HH1J104D CHIP R 100K D 1/16W
R165 RK73HB1J102J CHIP R 1.0K J 1/16W
R166 RK73HB1J104J CHIP R 100K J 1/16W
R167 RK73HB1J102J CHIP R 1.0K J 1/16W
R168 RK73HB1J000J CHIP R 0.0 J 1/16W
R170 RK73HH1J103D CHIP R 10K D 1/16W
R171-173 RK73HB1J000J CHIP R 0.0 J 1/16W

NX-300
PARTS LIST
20
Ref. No. Parts No. Description Address New
parts
Ref. No. Parts No. Description Address New
parts Destination Destination
CONTROL UNIT (X53-4260-XX)
R174-178 RK73HB1J104J CHIP R 100K J 1/16W
R180,181 RK73HB1J104J CHIP R 100K J 1/16W
R182 RK73HB1J474J CHIP R 470K J 1/16W
R183 RK73HB1J104J CHIP R 100K J 1/16W
R184 RK73HB1J473J CHIP R 47K J 1/16W
R185 RK73HB1J105J CHIP R 1.0M J 1/16W
R186 RK73HB1J473J CHIP R 47K J 1/16W
R187 RK73HB1J102J CHIP R 1.0K J 1/16W
R188 RK73HB1J473J CHIP R 47K J 1/16W
R189 RK73HB1J104J CHIP R 100K J 1/16W
R190 RK73HB1J102J CHIP R 1.0K J 1/16W
R191 RK73HB1J474J CHIP R 470K J 1/16W
R192 RK73HB1J102J CHIP R 1.0K J 1/16W
R193,194 RK73HB1J104J CHIP R 100K J 1/16W
R401 RK73HB1J152J CHIP R 1.5K J 1/16W K3
R402 RK73HB1J151J CHIP R 150 J 1/16W
R403 RK73HB1J152J CHIP R 1.5K J 1/16W K3
R404 RK73HB1J151J CHIP R 150 J 1/16W
R405 RK73HB1J152J CHIP R 1.5K J 1/16W K3
R406 RK73HB1J000J CHIP R 0.0 J 1/16W
R407,408 RK73HB1J103J CHIP R 10K J 1/16W
R409 RK73HB1J470J CHIP R 47 J 1/16W
R410-416 RK73HB1J471J CHIP R 470 J 1/16W
R417 RK73HB1J000J CHIP R 0.0 J 1/16W
R418 RK73HB1J471J CHIP R 470 J 1/16W
R419,420 RK73HB1J000J CHIP R 0.0 J 1/16W
R424 RK73HH1J683D CHIP R 68K D 1/16W
R425 RK73HH1J333D CHIP R 33K D 1/16W
R426-429 RK73HB1J000J CHIP R 0.0 J 1/16W
R431 RK73HB1J474J CHIP R 470K J 1/16W
R432,433 RK73HB1J000J CHIP R 0.0 J 1/16W
R434 RK73HB1J393J CHIP R 39K J 1/16W
R435,436 RK73HB1J104J CHIP R 100K J 1/16W
R437 RK73HB1J471J CHIP R 470 J 1/16W
R438,439 RK73HB1J104J CHIP R 100K J 1/16W
R440 RK73HB1J000J CHIP R 0.0 J 1/16W
R441 RK73HB1J153J CHIP R 15K J 1/16W
R442 RK73HB1J102J CHIP R 1.0K J 1/16W
R443 RK73HB1J474J CHIP R 470K J 1/16W
R444 RK73HB1J564J CHIP R 560K J 1/16W
R445 RK73HB1J154J CHIP R 150K J 1/16W
R446 RK73HB1J274J CHIP R 270K J 1/16W
R447 RK73HB1J104J CHIP R 100K J 1/16W
R448 RK73HB1J103J CHIP R 10K J 1/16W
R449-452 RK73HB1J474J CHIP R 470K J 1/16W
R453 RK73HB1J104J CHIP R 100K J 1/16W
R454 RK73HB1J474J CHIP R 470K J 1/16W
R455 RK73HB1J102J CHIP R 1.0K J 1/16W
R456 RK73HB1J474J CHIP R 470K J 1/16W
R457,458 RK73HB1J104J CHIP R 100K J 1/16W
R459,460 RK73HB1J102J CHIP R 1.0K J 1/16W
R461 RK73HB1J103J CHIP R 10K J 1/16W
R462 RK73HB1J102J CHIP R 1.0K J 1/16W
R463 RK73HB1J104J CHIP R 100K J 1/16W
R464 RK73HB1J474J CHIP R 470K J 1/16W
R465,466 RK73HB1J103J CHIP R 10K J 1/16W
R467 RK73HB1J104J CHIP R 100K J 1/16W
R468 RK73HB1J000J CHIP R 0.0 J 1/16W
R469 RK73HB1J474J CHIP R 470K J 1/16W
R470 RK73HB1J683J CHIP R 68K J 1/16W
R471 RK73HB1J000J CHIP R 0.0 J 1/16W
R472 RK73HB1J223J CHIP R 22K J 1/16W
R473 RK73HB1J332J CHIP R 3.3K J 1/16W
R474,475 RK73HB1J333J CHIP R 33K J 1/16W
R477,478 RK73HB1J000J CHIP R 0.0 J 1/16W
R479 RK73HB1J102J CHIP R 1.0K J 1/16W
R480 RK73HB1J273J CHIP R 27K J 1/16W
R481 RK73HB1J474J CHIP R 470K J 1/16W
R482 RK73HB1J103J CHIP R 10K J 1/16W
R483 RK73HB1J473J CHIP R 47K J 1/16W
R484 RK73HB1J223J CHIP R 22K J 1/16W
R485 RK73HB1J103J CHIP R 10K J 1/16W
R486 RK73HB1J100J CHIP R 10 J 1/16W
R487-490 RK73HH1J223D CHIP R 22K D 1/16W
R491 RK73HB1J104J CHIP R 100K J 1/16W
R492 RK73HB1J474J CHIP R 470K J 1/16W
R493 RK73HB1J000J CHIP R 0.0 J 1/16W
R494-497 RK73HH1J104D CHIP R 100K D 1/16W
R498 RK73HB1J333J CHIP R 33K J 1/16W
R499 RK73HB1J223J CHIP R 22K J 1/16W
R500 RK73HB1J473J CHIP R 47K J 1/16W
R501 RK73HB1J222J CHIP R 2.2K J 1/16W
R502,503 RK73HB1J103J CHIP R 10K J 1/16W
R504 RK73HB1J102J CHIP R 1.0K J 1/16W
R506 RK73HB1J222J CHIP R 2.2K J 1/16W
R507-511 RK73HB1J102J CHIP R 1.0K J 1/16W
R512 RK73HB1J101J CHIP R 100 J 1/16W
R513-515 RK73HB1J102J CHIP R 1.0K J 1/16W
R516 RK73HB1J101J CHIP R 100 J 1/16W
R517 RK73HB1J102J CHIP R 1.0K J 1/16W
R518 RK73HB1J101J CHIP R 100 J 1/16W
R519-528 RK73HB1J102J CHIP R 1.0K J 1/16W
R529-531 RK73HB1J101J CHIP R 100 J 1/16W
R532 RK73HB1J102J CHIP R 1.0K J 1/16W
R533-535 RK73HB1J101J CHIP R 100 J 1/16W
R536-540 RK73HB1J102J CHIP R 1.0K J 1/16W
R541 RK73HB1J101J CHIP R 100 J 1/16W
R542 RK73HB1J102J CHIP R 1.0K J 1/16W
R543 RK73HB1J101J CHIP R 100 J 1/16W
R544 RK73HB1J102J CHIP R 1.0K J 1/16W
R545 RK73HB1J101J CHIP R 100 J 1/16W
R546,547 RK73HB1J102J CHIP R 1.0K J 1/16W
R548,549 RK73HB1J473J CHIP R 47K J 1/16W
R701-707 RK73HB1J000J CHIP R 0.0 J 1/16W
R709-715 RK73HB1J000J CHIP R 0.0 J 1/16W
R716 RK73GB2A000J CHIP R 0.0 J 1/10W
R717-722 RK73HB1J104J CHIP R 100K J 1/16W
R723 RK73HB1J105J CHIP R 1.0M J 1/16W
R724 RK73HB1J104J CHIP R 100K J 1/16W
R725 RK73HB1J100J CHIP R 10 J 1/16W
R726 RK73HB1J104J CHIP R 100K J 1/16W
R727-729 RK73HB1J105J CHIP R 1.0M J 1/16W
R730 RK73HB1J471J CHIP R 470 J 1/16W
R731,732 RK73HB1J105J CHIP R 1.0M J 1/16W
R733 RK73HB1J473J CHIP R 47K J 1/16W
R735 RK73HB1J473J CHIP R 47K J 1/16W
R736 RK73HB1J823J CHIP R 82K J 1/16W
R737 RK73HB1J153J CHIP R 15K J 1/16W
R738 RK73HB1J563J CHIP R 56K J 1/16W
R739 RK73HB1J823J CHIP R 82K J 1/16W