Kenwood NX-320 Series User manual

SERVICE MANUAL
This product uses Lead Free solder.
This product complies with the RoHS directive for the European market.
© 2011-3 PRINTED IN JAPAN
B51-8963-00 (N)455
NX-320
UHF DIGITAL TRANSCEIVER
Does not come with antenna.
Antenna is available as an option.
Knob (Volume)
(K29-9485-03)
Knob (Selector)
(K29-9486-03)
Knob (PTT)
(K29-9500-03)
Button knob
(Side1/Side2/AUX)
(K29-9501-03)
Plastic cabinet assy
(A02-4132-03)
Packing (4Key)
(G53-1864-01)
Packing (16Key)
(G53-1865-01)
Plastic cabinet assy
(A02-4131-03)
Plastic cabinet assy
(A02-4130-03)
Helical antenna
(KRA-23: Option)
Knob (Volume)
(K29-9485-03)
Knob (Selector)
(K29-9486-03)
Knob (PTT)
(K29-9500-03)
Button knob
(Side1/Side2/AUX)
(K29-9501-03)
Helical antenna
(KRA-23: Option)
Knob (Volume)
(K29-9485-03)
Knob (Selector)
(K29-9486-03)
Knob (PTT)
(K29-9500-03)
Button knob
(Side1/Side2/AUX)
(K29-9501-03)
Helical antenna
(KRA-23: Option)
NX-320 K,K4,E3 NX-320 K2,K5,E2 NX-320 K3,K6,E

NX-320
2
GENERAL.....................................................3
SYSTEM SET-UP.........................................4
REALIGNMENT ...........................................5
DISASSEMBLY FOR REPAIR ......................8
CIRCUIT DESCRIPTION ............................12
COMPONENTS DESCRIPTION.................18
PARTS LIST ...............................................20
EXPLODED VIEW ......................................30
PACKING....................................................31
TROUBLE SHOOTING ..............................32
ADJUSTMENT
K TYPE....................................................35
E TYPE....................................................54
TERMINAL FUNCTION .............................76
PC BOARD
DISPLAY UNIT (X54-3760-XX)..............78
TX-RX UNIT (X57-8050-XX)..................82
LEVEL DIAGRAM .....................................86
INTERCONNECTION DIAGRAM ..............87
SCHEMATIC DIAGRAM ............................88
BLOCK DIAGRAM ....................................98
OPTIONAL ACCESSORIES
KNB-55L (Li-ion Battery Pack)............101
KNB-56N (Ni-MH Battery Pack) .........101
KNB-57L (Li-ion Battery Pack)............101
SPECIFICATIONS ....................................102
CONTENTS
Document Copyrights
Copyright 2011 by Kenwood Corporation. All rights re-
served.
No part of this manual may be reproduced, translated,
distributed, or transmitted in any form or by any means,
electronic, mechanical, photocopying, recording, or other-
wise, 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 er-
rors or omissions. Neither is any liability assumed for dam-
ages 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 engineer-
ing, copy, reproducing or disclosing on an Internet website
of the firmware is strictly prohibited without prior written
consent of Kenwood Corporation. Furthermore, any resell-
ing, assigning or transferring of the firmware is also strictly
prohibited without embedding the firmware in Kenwood
product memories.
Transceivers containing AMBE+2™ Vocoder:
The AMBE+2™ voice coding technology is embedded in
the firmware under the license of Digital Voice Systems, Inc.

NX-320
3
Model & Destination
(Market code)
Display unit X54-376X-XX
TX-RX unit X57-805X-XX
Frequency
range Remarks LCD 4-key DTMF keypad
0-10 0-11 0-12 0-10 0-11
NX-320
K✓✓
450~
520MHz
1st IF:
49.95MHz
LOC:
50.4MHz
–––
K2 ✓✓ ✓✓ –
K3 ✓ ✓ ✓✓✓
K4 ✓✓
400~
470MHz
–––
K5 ✓✓ ✓✓ –
K6 ✓ ✓ ✓✓✓
E✓✓✓✓✓
E2 ✓✓ ✓✓ –
E3 ✓✓–––
INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced techni-
cians familiar with similar types of commercial grade com-
munications equipment. It contains all required service
information for the equipment and is current as of the pub-
lication 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 informa-
tion, 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 re-
quired 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
electrical blasting caps or in an explosive atmosphere.
• This equipment should be serviced by a qualified techni-
cian only.
SERVICE
This transceiver is designed for easy servicing. Refer to
the schematic diagrams, printed circuit board views, and
alignment procedures contained within.
GENERAL

NX-320
4
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, programming interface (KPG-22A/22U),
USB adapter (KCT-53U), and programming software (KPG-141D) are
required for programming.
(The frequency, and signaling data are programmed for the transceiver.)
Frequency range (MHz) RF power LCD 4-key
No
No
No
Yes Yes
Yes
Yes
Yes
Yes
Yes
No No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Type
DTMF keypad
TX/RX 400~470 5WNX-320 K6
TX/RX 400~470 5WNX-320 E
TX/RX 400~470 5WNX-320 E2
TX/RX 400~470
TX/RX 450~520
TX/RX 450~520
TX/RX 450~520
TX/RX 400~470
TX/RX 400~470
5W
5W
5W
5W
5W
5W
NX-320 E3
NX-320 K
NX-320 K2
NX-320 K3
NX-320 K4
NX-320 K5
YES KRA-23 or KRA-27
Optional antenna
NO
NO
(Option)
(Option)
YES KMC-21/KMC-45
Speaker microphone
or
KMC-48GPS
GPS speaker microphone
Delivery

NX-320
5
1. Modes
User mode
Panel test mode *1
Firmware version information *1
Panel tuning mode *1
Data programming mode
PC test mode PC tuning mode
PC mode
Clone mode *1
Firmware
programming mode
Mode Function
User mode For normal use.
Panel test mode *1 Used by the dealer to check the funda-
mental characteristics.
Panel tuning mode *1 Used by the dealer to tune the transceiver.
PC mode Used for communication between the
transceiver and PC.
Data programming
mode
Used to read and write frequency data and
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.
Firmware program-
ming mode
Used when changing the main program of
the flash memory.
Clone mode *1 Used to transfer programming data from
one transceiver to another.
Firmware version
information *1
Used to confirm the internal firmware ver-
sion.
*1: K2,K3,K5,K6,E and E2 models only
2. How to Enter Each Mode
Mode Operation
User mode Power ON
Panel test mode *2 [ ] + Power ON
PC mode Received commands from PC
Panel tuning mode *2 [Panel test mode] + [ ]
Firmware programming mode [Side1] + Power ON
Clone mode *2 [ ] + Power ON
Firmware version information *2 [ ] + Power ON
*2: K2,K3,K5,K6,E and E2 models only
3. Panel Test Mode
(K2,K3,K5,K6,E and E2 models only)
Setting method refer to ADJUSTMENT.
4. Panel Tuning Mode
(K2,K3,K5,K6,E and E2 models only)
Setting method refer to ADJUSTMENT.
5. PC Mode
5-1. Preface
The transceiver is programmed by using a personal com-
puter, programming interface (KPG-22A/22U), USB adapter
(KCT-53U) and programming software (KPG-141D).
The programming software can be used with a PC. Fig-
ure 1 shows the setup of a PC for programming.
PC KPG-22A or KPG-22A
+KCT-53U or KPG-22U
KPG-141D
Tuning cable
(E30-3216-05)
D-SUB
(9-pin)
Transceiver
KPG-22A
PC
Gray
Gray/Black
1.5D-XV Lead wire
1.5D-XV Shield wire
+
–
+
–
SP
MIC
Transceiver Transceiver
USB
KPG-22U
PC
USB
KPG-22A
KCT-53U
PC
Fig. 1
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-22A, the KCT-53U can be used.).
Note:
• You must install the KPG-22U driver in the computer to
use the USB programming interface cable (KPG-22U).
• 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.
REALIGNMENT

NX-320
6
2. When the POWER is switched on, you can immediately
enter user mode. When the PC sends a command, the
transceiver enters PC mode, and “PROGRAM” is dis-
played on the LCD.
When data is transmitting from the transceiver, the red
LED lights.
When data is receiving by the transceiver, the green LED
lights.
Note:
The data stored in the computer must match the “Model
Name” when it is written into the flash memory.
5-3. KPG-22A description
(PC programming interface cable: Option)
The KPG-22A is required to interface the transceiver to
the computer. It has a circuit in its D-sub connector case
that converts the RS-232C logic level to the TTL level.
The KPG-22A connects the SP/MIC connector of the
transceiver to the RS-232C serial port of the computer.
5-4. KPG-22U description
(USB programming interface cable: Option)
The KPG-22U is a cable which connects to a USB port on
a computer.
When using the KPG-22U, install the supplied CD-ROM
(with driver software) in the computer. The KPG-22U driver
runs under Windows XP, Vista or 7.
5-5. KCT-53U description (USB adapter: Option)
The KCT-53U is a cable which connects the KPG-22A 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, XP or Vista (32-bit).
5-6. Programming software KPG-141D description
The KPG-141D is the programming software for the trans-
ceiver supplied on a CD-ROM. This software runs under
Windows XP, Vista or 7 on a PC.
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 using
the interface cable (KPG-22A/22U) and USB adapter (KCT-
53U: when the interface cable is KPG-22A, 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
(ver. 6.0 or later)). The Fpro.exe exists in the KPG-141D
installed holder.
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 [Side1] key while turning the trans-
ceiver power ON. Then, the orange LED on the transceiv-
er lights and “FIRM PRG” 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 transceiv-
er 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.
6-4. Function
If you press the [Side1] key while “FIRM PRG” is dis-
played, the checksum is calculated, and a result is displayed.
If you press the [Side1] key again while the checksum is
displayed, “FIRM PRG” is redisplayed.
Note:
• This mode cannot be entered if the Firmware Program-
ming mode is set to Disable in the Programming soft-
ware.
• Normally, write in the high-speed mode.
• The text message are displayed for K2,K3,K5,K6,E and E2
models only.
7. Clone Mode
(K2,K3,K5,K6,E and E2 models only)
Programming data can be transferred from one transceiv-
er to another by connecting them via their external SP/MIC
connectors. The operation is as follows (the transmit trans-
ceiver 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
Note:
The following data can be cloned.
• Fleet (own)/ID (own) for FleetSync
• Unit ID (own) for NXDN
• ID (own) for MDC-1200
• My ID for 5-tone (E,E2 models only)
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 “CLN LOCK”.
If the password is not set, the transceiver displays
“CLONE”.
REALIGNMENT

NX-320
7
2. When you enter the correct password, and “CLONE”
is displayed, the transceiver can be used as the cloning
source. The following describes how to enter the pass-
word.
3.
• How to enter the password using the keypad (K3,K6
and E models only);
If one of keys 0 to 9 is pressed while the “CLN LOCK” is
displayed, the pressed number 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” is displayed if the entered password is
correct. If the password is incorrect, “CLN LOCK” is re-
displayed.
• How to enter the password using the Selector (K2,K3,
K5,K6,E and E2 models only);
If the Selector is rotated while “CLN LOCK” is displayed,
the Read authorization password input screen is dis-
played.
If the Selector is rotated while the Read authorization
password input screen is displayed, the number (0 to 9)
blinks on the LCD. When you press the [ ] key, the cur-
rently selected number is determined. If you press the
[] key after entering the password in this procedure,
“CLONE” is displayed if the entered password is correct.
If the password is incorrect, “CLN LOCK” is redisplayed.
4. Power ON the target transceiver.
5. Connect the cloning cable (part No. E30-3410-05) to the
SP/MIC connectors on the source and target.
6. Press the [ ] key on the source while the source displays
“CLONE”. The data of the source is sent to the target.
While the target is receiving the data, “PROGRAM” 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 operated 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”. Carry out the op-
eration in step 4 to 6.
Note:
• Cannot be cloned if the password (overwrite password) is
programmed to the target.
• “Model Name” must be same to clone the transceiver.
Cloning cable
(E30-3410-05)
Fig. 2
8. Firmware Version Information
(K2,K3,K5,K6,E and E2 models only)
Press and hold the [ ] key while turning the transceiver
power ON and then keep pressing and holding the [ ] key,
the firmware version information appears on the LCD.
REALIGNMENT

NX-320
8
DISASSEMBLY FOR REPAIR
1. Precautions for Disassembly
■Removing the selector knob and volume knob
1. Using a thin tool, insert it in the hole on the selector knob
side and push the knob spring. q
Note: When you push the knob spring, take care not to
damage the resin of the knob.
2. Lift and remove the selector knob wwhile pushing the
knob spring.
3. Repeat steps 1 and 2 for the volume knob, to remove the
volume knob e.
:
@
.
Note:
Perform the following procedures when installing the selec-
tor knob and volume knob.
1) Match the direction for the hole of the knob and the knob
spring.
2) Push the knob onto the knob spring until a click sounds.
■Removing the selector knob spring and volume
knob spring
1. Lightly grasp the left and right sides of the selector knob
spring, then shift the knob spring to the left and right,
little by little, as shown in the figure. q
Note: Do not grasp the knob spring tightly.
2. Remove the selector knob spring w.
Note: Do not bring your fingers into contact with the flat
spring of the knob spring as much as possible.
3. Repeat steps 1 and 2 for the volume knob spring, to re-
move the volume knob spring e.
:
@
.
Knob spring
Encoder
Note:
Perform the following procedures when installing the selec-
tor knob spring and volume knob spring.
1) Match the direction for the knob spring and the encoder.
2) Insert the encoder onto the knob spring until a click
sounds.
■Removing the mechanical stopper (without LCD
models only)
1. Pick up and lift the tab of a mechanical stopper using a
pair of tweezers. q
Note: Take care not to damage the packing.
2. Remove the mechanical stopper w.
@
:
■Removing the TX-RX unit from the chassis
1. Remove the flat cable from the connector (CN2). q
2. Remove the Speaker lead wire from the connector (CN4).
w
3. Remove the PTT FPC from the connector (CN3). e
4. Remove the VOL/SEL FPC from the connector (CN1). r
CN2
CN3
CN4
CN1
:
@
.;
PTT FPC
Flat cable
TX-RX unit
5. Remove the packing tfrom the SP/MIC jack.
6. Remove the 14 screws y.
7. 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. u
>
B
BB
B
B
=

NX-320
9
■Removing the speaker holder
There is a space of approximately 1mm (0.04 inch) be-
tween the center part of the front glass of the speaker
holder and the surface of the Display unit. Set your finger
on the space in the center part of the front glass, then lift
and remove it.
Display unit
Speaker holder
■Removing the TOP packing
1. Pull the TOP packing to the left to remove the packing
that is fit into the left groove of the chassis. q
2. Pull the TOP packing to the right to remove the packing
that is fit into the right groove of the chassis. w
3. Pull the TOP packing to the center to remove the packing
that is fit into the center groove of the chassis. e
4. Remove the TOP packing. r
Note:
Remove the packing slowly, as the packing of the selec-
tor part might overset when the TOP packing is removed.
If the packing is turned over, return it to the normal posi-
tion using a soft tipped item (e.g., your finger).
;
@
.
:
2. Precautions for Reassembly
■Apply the bond to the inside of the selector
circle nut and volume circle nut
Apply the bond (W05-0019-00) or “THREE BOND 1401B”
at two points inside of the circle nut before tightening the
circle nut.
Circle nut
■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. q
Note:
Confirm that the entire groove of the key top fits to the
chassis tightly.
2. Mount the chassis onto the case. w
Note:
• After mounting the chassis onto the case, if the 16-
key part on the key top gets stuck inside the case as
shown in the figure, return it to the normal position us-
ing a soft tipped item (e.g., your finger). e
Prying it with a pointed metal tool such as forceps,
may damage the key top or packing.
• Confirm that the TOP packing is not caught in the An-
tenna or Volume holes of the case.
.
@
:
16-key part
Antenna of TOP packing
Volume of TOP packing
DISASSEMBLY FOR REPAIR

NX-320
10
■Forming the flat cable
Form the right and left end of the flat cable as shown in
the figure. (Bend the terminal surface of the flat cable on
the inside.)
Note: When bending the flat cable, bend it squarely.
There is a possibility of disconnecting when the flat cable
is bent too much.
Flat cable
■Changing the channel selector from 16-channel
operation to free (without LCD models only)
1. Remove the channel selector knob q. (Refer to page 8
for how to remove the channel selector knob.)
2. Remove the knob spring w. (Refer to page 8 for how to
remove the knob spring.)
3. Remove the mechanical stopper e. (Refer to page 8 for
how to remove the mechanical stopper.)
4. Reassemble the channel selector knob and knob spring
that were removed in steps 1 and 2, in their original posi-
tions.
Note: Refer to page 8 for how to install the channel se-
lector knob and knob spring.
@
.
:
■Changing the channel selector from free opera-
tion to 16-channel (with LCD models only)
1. Remove the channel selector knob q. (Refer to page 8
for how to remove the channel selector knob.)
2. Remove the knob spring w. (Refer to page 8 for how to
remove the knob spring.)
3. Pinch the supplied mechanical stopper eusing your fin-
gers, then install it into the groove of the selector part on
the case.
4. Reassemble the channel selector knob and knob spring
that were removed in steps 1 and 2, in their original posi-
tions.
Note: Refer to page 8 for how to install the channel se-
lector knob and knob spring.
:
@.
■Connection place of the antenna hot pin and
antenna terminal
An antenna hot pin is connected with the antenna termi-
nal at the position shown in the figure.
Confirm that the antenna hot pin has firmly come in con-
tact with the terminal when the TX-RX unit is tightened
with the screw.
Additionally, refer to the following figures for the connec-
tion place of the antenna terminal and the TX-RX unit.
TX-RX unit Antenna
terminal
Antenna
terminal
Antenna
hot pin
■Align the SP/MIC lead wire
Align the SP/MIC lead wire as shown in the figure. It is
possible to fix temporarily by interweaving the two lead
wires between the tabs (tab A and tab B) and boss of the
speaker holder.
A
B
DISASSEMBLY FOR REPAIR

NX-320
11
DISASSEMBLY FOR REPAIR
■Assembly information (Sheet/Cushion)
When “Main Parts” is changed (ordered), “Assembled Sheet/Cushion” should also be changed (ordered) together.
The Sticker and Sheet etc are non-reusable parts. It requires the new one to get the radio’s performance after repairs.
For example, when “Plastic Cabinet Assy (A02-4130-03 (without key)/A02-4131-03 (4-key)/A02-4132-03 (16-key))” is changed,
“Sticker (B42-7417-04)” and “Fibrous Sheet (G10-1827-04)” should be ordered and changed together because Sticker (B42-
7417-04) and Fibrous Sheet (G10-1827-04) are non-reusable.
Main Parts Assembled Sheet/ Cushion
Part Name Part Number Part Name Part Number Remark
Plastic Cabinet Assy (without key) A02-4130-03 Sticker B42-7417-04 “NEXEDGE” is printed.
Plastic Cabinet Assy (4-key) A02-4131-03
Fibrous Sheet (SP) G10-1827-04
Plastic Cabinet Assy (16-key) A02-4132-03
Speaker T07-0787-05 Rubber Cushion (SP) G11-4272-14
Sheet (SP) G11-4527-04
Chassis A10-4148-01
Sheet (PTT) G11-4543-04
Rubber Sheet (FET) G11-4315-14 Used for stabilizing the radiation performance
of the FET.
Sheet (Air) G11-4500-04
This sheet is put on the air vent hole.
This sheet lets air through, but does not let
water through.
MIC Element T91-0673-05 Sheet (ECM) G11-4558-04

NX-320
12
1. Overview
The NX-320 is a UHF portable transceiver designed to
operate in the frequency range of 450 to 520MHz (K,K2,K3)
or 400 to 470MHz (K4,K5,K6,E,E2,E3). The unit consists of a
receiver, transmitter, phase-locked loop (PLL) frequency syn-
thesizer, baseband parts, power supply, and control circuits.
2. Frequency Configuration
The receiver is a double-conversion superheterodyne
using the first intermediate frequency (IF) of 49.95MHz
and the second IF of 450kHz. Incoming signals from the
antenna are mixed with the local signal from the PLL circuit
to produce the first IF of 49.95MHz. This is then mixed with
the 50.4MHz 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
x3
50.4MHz
ANT
SW
RF
AMP
MIX
IF AMP
PLL
VCO
Baseband Circuit
ANT
400~470MHz (K4,K5,K6,E,E2,E3)
450~520MHz (K,K2,K3)
MCF
CF
450kHz
49.95MHz
16.8MHz
350.05~420.05MHz (K4,K5,K6,E,E2,E3)
400.05~470.05MHz (K,K2,K3)
PA
AMP
TX
AMP
TCXO
AF
AMP
MIC
AMP
1st MIX SP
MIC
:
:@
:
@
TX/RX:
Fig. 1 Frequency configuration
3. Receiver System
3-1. RF circuit
An incoming RF signal from the antenna terminal is
passed through the antenna switch (D102, D103, D105 and
D106) and then the band-pass filter (L212, L213 and L214).
The band-pass 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 (IC4). The signal is
amplified by an RF amplifier (Q202), and passed through the
band-pass filter (L207, L208 and L209). The resulting signal
is applied to the first mixer (Q201), where it is mixed with
the first local oscillator signal output from the frequency
synthesizer to produce the first IF (49.95MHz).
Fig. 2 RF and IF circuit
IC901
IC2 (1/2)
IC603
IC302
MIX, AGC
IC904
ASIC
IC610
DSP
IC4
VOL
LPF BPF
ANT
SW BPF BPF
CF2
BPF
Q301
D102,D103
D105,D106
2nd OSC
X401
L114
L115
L116
L212
L213
L214
L209
L208
L207 1st PLL
OSC (PLL)
RF AMP MCF
16.8MHz
TCXO x3
Q202 XF1
IF AMP
Q303
CF1
BPF
SP
ANT
Q201
1st MIX

NX-320
13
3-2. IF circuit
The first IF signal is passed through a four-pole monolithic
crystal filter (XF1) to reject adjacent channel signals. The fil-
tered first IF signal is amplified by the first IF amplifier (Q303)
and then applied to the IF system IC (IC302). The IF system
IC provides a second mixer, AGC amplifier, and RSSI (Re-
ceived Signal Strength Indicator).
The second mixer mixes the first IF signal with the
50.4MHz of the second local oscillator output and produces
the second IF signal of 450kHz.
The second IF signal is passed through the ceramic filter
(CF1) to reject the adjacent channel signal. The filtered sec-
ond IF signal is amplified by the AGC amplifier.
The signal from the AGC amplifier is input to the ASIC
(IC610) through the ceramic filter (CF2).
3-3. Audio amplifier circuit
Audio processing (high-pass filter, low-pass filter, de-
emphasized and so on) at FM mode and decoding at NXDN
mode are processed by the DSP. The audio signal from
IC610 and IC603 goes through the amplifier (IC904). The
signal then goes through an electronic volume control (IC4),
and AF amplifier (IC901).
While AFSW is High, the power supply of audio power
amplifier (IC901) is activated, and the output to the speaker
turns ON.
3-4. Squelch circuit
It amplifies the demodulated noise signal from IC610 af-
ter filtering through the LPF and HPF circuit. The amplified
signal is then converted to a DC signal by the detection cir-
cuit. The converted signal is fed back to IC610.
Fig. 3 Squelch circuit
DET
IC610
IC1 (1/2)
ASQAPC
ASQDET
ASQ
LPF
IC1 (2/2)
HPF
Q3
AMP
D2
RECT
IC304 (1/2)
AMP
4. Transmitter System
4-1. Audio band circuit
The signal from the microphone is amplified by IC2 (2/2)
and limited by the AGC circuit which is composed of D3,
D4, Q4 and Q5. IC2 works as an anti-aliasing LPF filter.
4-2. Baseband circuit
The audio signal output from the baseband circuit is con-
verted to digital data with a sampling frequency of 48kHz.
This digital data is sent to the DSP (IC603), and voice signals
of 300Hz or lower and frequencies of 3kHz or higher are cut
off and the audio range of 300Hz to 3kHz is extracted. The
audio signal is then pre-emphasized in FM mode and syn-
thesized with the signals, such as QT and DQT, as required,
and is then output from IC610. In Digital mode, the audio
signal is converted to the 4-Level FSK baseband signal and
output from IC610. The DTMF and MSK baseband signals
are also generated by the DSP and output by IC610
The LPF (IC6) works as a smoothing filter. The level out-
put according to the transmit carrier is fine-adjusted accord-
ing to each modulation method.
Fig. 4 Audio band and Baseband circuit
AMP
AGC
IC2 (2/2)
D3,D4
Q4,Q5
LPF VCO to TX stage
PLL IC
IC403
IC6 (1/2)
IC610
IC603
DSP
MIC
CIRCUIT DESCRIPTION

NX-320
14
4-3. VOX
The DSP detects the audio level. If the detected level be-
comes higher than the threshold level, the VOX starts.
4-4. Drive and Final amplifier
The signal from the T/R switch (D413 is on) is amplified
by the pre-drive amplifier (Q102) to 16~17dBm. It makes
it possible to spoil input to the drive amplifier by control-
ling the power supply of the pre-drive amplifier with the
PD switch (Q110). The output of the pre-drive amplifier is
amplified by the drive and final amplifiers (Q103, Q104) to
5.0W (1.0W when the power is low). Q103 and Q104 are
MOS FETs. The output of the final amplifier is then passed
through the harmonic filter (LPF) and antenna switch (D102,
D103 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 (Q104) and keeps a constant
current. The voltage drop at R153, R154 and R155 is caused
by the current flowing through the RF power amplifier and
this voltage is applied to the differential amplifier (IC101
1/2). IC101 (2/2) compares the output voltage of IC101 (1/2)
with the reference voltage from IC610, and the output of
IC101 (2/2) controls the VGG of Q103 and Q104 to make the
both current constant. The change of power high/low is car-
ried out by the change of the reference voltage. Q106, Q107
and Q108 are turned on and Q105 and Q109 are turned off
during transmission and the APC circuit is active.
Fig. 5 Drive and final amplifier and APC circuit
from
T/R SW (D413)
Drive
AMP
Pre-Drive
AMP
Q102 Q103
Final
AMP
Q104
ANT
SW LPF
D102,D103
ANT
VGG
IC101
(1/2)
IC101
(2/2)
R153
R154
R155
+B
Reference voltage
from IC610
VCC for Pre-Drive AMP
from PD SW (Q110)
5. PLL Frequency Synthesizer
5-1. TCXO (X401)
The TCXO (X401) generates a reference frequency of
16.8MHz for the PLL frequency synthesizer. This reference
frequency is applied to pin 9 of the PLL IC (IC403) and is
connected to the IF circuit as a 2nd local signal through the
Tripler (Q301).
The frequency adjustment is achieved by switching the
ratio of dividing frequency. The resolution of the adjusting
frequency is approximately 4Hz.
5-2. VCO
There is a RX VCO and a TX VCO.
The TX VCO (Q402) generates a transmit carrier and the
RX VCO (Q401) generates a 1st local signal. For the VCO
oscillation frequency, the transmit carrier is 450 to 520MHz
(K,K2,K3) or 400 to 470MHz (K4,K5,K6,E,E2,E3) and the 1st
local receive signal is 400.05 to 470.05MHz (K,K2,K3) or
350.05 to 420.05MHz (K4,K5,K6,E,E2,E3).
The VCO oscillation frequency is determined by one sys-
tem of operation switching terminal “T/R” and two systems
of voltage control terminals “CV” and “ASSIST”.
The operation switching terminal, “T/R”, is controlled by
the control line (/T_R) output from the ASIC (IC610). 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 “ASSIST”, are
controlled by the PLL IC (IC403) and ASIC (IC610) 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.
5-3. PLL IC (IC403)
The PLL IC compares the differences in phases of the
VCO oscillation frequency and the TCXO reference frequen-
cy, returns the difference to the VCO CV terminal and real-
izes the “Phase Locked Loop” for the return control. This
allows the VCO oscillation frequency to accurately match
(lock) the desired frequency.
CIRCUIT DESCRIPTION

NX-320
15
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 sup-
plement 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
(IC610) through the 3-line “SDO1”, “PCK_RF”, “/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 (unlocked), the “PLD” logic is low.
The modulation signal of the Low-speed data is applied to
pin 23 of the PLL IC (IC403).
The modulation signal is digital data of a sampling fre-
quency of 96kHz set for the PLL IC by the DSP (IC603)
through the “PLLMOD” line.
5-4. Local switch (D412, D413)
The connection destination of the signal output from the
buffer amplifier (Q408) is changed with the diode switch
(D413) that is controlled by the transmission power supply,
50T, and the diode switch (D412) 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 (Q102). If the 50T logic is
low, it is connected to a receive-side mixer (Q201).
Fig. 6 PLL block diagram
Loop
Filter
BUFF
AMP
VCO
LPF
100C
TCXO
PLL
IC403 Q405
Q401,Q402
D402~D411
D415
BUFF
AMP
Q408
SDO1
PCK_RF
/PCS_RF
PLLMOD
X401
16.8MHz
T/R
SW
D412,D413
50CS
to TX stage
50T
50R
to 1st Mixer
IC404 (1/2)
IC402
CV
VCO MOD
ASSIST
6. Control Circuit
The control circuit consists of the ASIC (IC610) and its pe-
ripheral circuits. IC610 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 (IC610) 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.
6-2. Memory circuit
The memory circuit consists of the ASIC (IC610), the
SRAM (IC605), and the flash memory (IC601). The flash
memory has a capacity of 32M-bit that contains the trans-
ceiver control program for the ASIC and stores the data. It
also stores the data for transceiver channels and operating
parameters that are written by the FPU. This program can
be easily written from external devices. The SRAM has a
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-141D), tuning data (Deviation, Squelch, etc.),
and firmware program (User mode, Test mode, Tuning
mode, etc.).
■SRAM (Static memory)
Note: The SRAM has a temporary data area and work area.
CIRCUIT DESCRIPTION

NX-320
16
6-3. LCD
The LCD is controlled using the 4 serial lines (SDI0, /
LCDCS, SCK0, SDO0) from the ASIC (IC610).
6-4. Key detection circuit
Keys are detected using the LCD controller driver IC (IC8).
If a pressed key is detected by IC8, it is informed to IC610
through the serial line.
6-5. Low battery warning
The battery voltage is divided using R514 and R515 and
is detected by the ASIC (IC610). When the battery voltage
falls below the voltage set by the Low battery warning ad-
justment, 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.
Low battery warning Battery condition
The red LED blinks during
transmission.
The battery voltage is low but
the transceiver is still usable.
The red LED blinks and the
warning tone beeps while the
PTT switch is pressed.
The battery voltage is low and
the transceiver is not usable to
make calls.
6-6. DSP
The DSP circuit consists of a DSP (IC603) and processes
the baseband signal. The DSP operates on an external clock
of 18.432MHz (the same as the IC610), the I/O section op-
erates at 3.3V and the core section operates at 1.5V. The
DSP carries out the following processes:
• 4 Level 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
• 5-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 (F1), and goes to the RF final ampli-
fier, AVR ICs (IC504, IC902), DC/DC converter (IC506), and
voltage detector IC (IC507). The voltage detector watches
the battery voltage. If the battery voltage is 5.6V or higher,
the detector outputs High.
When the VOL SW is turned on, SB1 becomes high (bat-
tery voltage). DC/DC (IC506) operates if both SB1 and the
output of the detector are high. IC506 outputs 3.8V and
activates IC502 (33M), IC503 (15M), IC501 (33A) and IC505
(33C). As a result, the ASIC and DSP operate.
The SBC signal becomes High after the ASIC operates,
IC504 (50C), IC902 (50V) and Q501 (SB2) are turned on.
When the /SAVE signal becomes High, Q512 (50C) oper-
ates. Switches (Q503, Q505) are controlled by the ASIC.
Q505 (50T) is turned on in transmit mode. Q503 (50R) is
turned on in receive mode.
When the VOL SW is turned off, the /PSW signal be-
comes Low. After detecting the /PSW signal, the ASIC
changes the SBC signal to Low.
50C is fed to IC509 (100C). IC509, D511 and D512 con-
sist of a voltage doubler. C543 is charged to 5V by 50C and
switched to C545 by the “DDCLK” control signal. The 100C
circuit then outputs approximately +10VDC.
8. Signaling Circuit
8-1. Encode (QT/DQT/LTR/DTMF/2-tone/5-tone/MSK)
Each signaling data signal of QT, DQT, LTR, DTMF,
2-tone/5-tone and MSK is generated by the DSP circuit, su-
perimposed on a modulation signal and output from IC610.
Each deviation of the TX QT, DQT, LTR, DTMF, 2-tone/5-tone
and MSK tone is adjusted by changing the output level of
IC603 and the resulting signal is routed to the VCO and PLL.
8-2. Decode (QT/DQT/LTR/DTMF/2-tone/5-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 expand-
er. The compander reduces noise by utilizing a compressor
and an expander. The transceiver contains a DSP (IC603) to
perform this operation. The transceiver compander can be
turned on or off using the FPU.
CIRCUIT DESCRIPTION

NX-320
17
Fig. 7 Power supply circuit
F1
2.5A F2
1.0A
VOL/SW
+B
TX-RX unit
Q902
SW
IC902
50V
IC507
5.6V Det
IC506
38M
IC501
33A
IC502
33M
IC503
15M
IC505
33C
IC504
50C
Q501
SB2
IC509
100C
Q505
50T
Q503
50R
Q512
50CS
Ripple
filter
IC8
LCD driver
ASIC
IC610
Final AMP, APC
AFPA
2-pin Jack
DSP, FLASH, SRAM
DSP
PLL, TCXO
ASSIST
TX circuit
RX circuit
PLL, fin
VCO
AF circuit
AF circuit, DAC
SQL circuit
LED
/PSW
/BINT
Display unit
CN2
CN5
CIRCUIT DESCRIPTION

NX-320
18
Display unit (X54-3760-XX)
Ref. No. Part Name Description
IC1 IC ASQ BPF
IC2 IC AF LPF/MIC amplifier
IC4 IC D/A converter
IC6 IC VCO MOD/VREF
IC8 IC LCD driver
Q1 Transistor TX/BUSY LED switch
Q2 FET SQL noise BW switch
Q3 Transistor SQL noise amplifier
Q4,5 Transistor MIC AGC
Q6 Transistor KEY backlight switch
Q7 Transistor KEY backlight switch control
Q8 Transistor LCD backlight switch
D1 LED TX/BUSY LED
D2 Diode Noise detector
D3,4 Diode AGC detector
D7~14 LED KEY backlight
D15,16 Diode KEY control
D18,19 LED LCD backlight
TX-RX unit (X57-8050-XX)
Ref. No. Part Name Description
IC101 IC OP AMP (APC)
IC201 IC DC amplifier (BPF)
IC302 IC FM system
IC304 IC DC amplifier (RSSI/ASQL)
IC402 IC DC amplifier (Assist)
IC403 IC PLL system
IC404 IC DC amplifier (CV/APC)
IC501 IC Voltage regulator (33A)
IC502 IC Voltage regulator (33M)
IC503 IC DC/DC converter (15M)
IC504 IC Voltage regulator (50C)
IC505 IC Voltage regulator (33C)
IC506 IC DC/DC converter (38M)
IC507 IC Voltage detector (BATT)
IC509 IC DC/DC converter (100C)
IC601 IC Flash memory
IC603 IC DSP
IC605 IC SRAM
IC607 IC Voltage detector (Reset)
Ref. No. Part Name Description
IC609 IC Buffer (Clock)
IC610 IC ASIC
IC611,612 IC AND gate (2 input)
IC613 IC Motion sensor
IC901 IC AF power amplifier
IC902 IC Voltage regulator (50V)
IC904 IC OP AMP (Beep/voice/RX AF)
Q102 Transistor Pre-drive amplifier
Q103 FET Drive amplifier
Q104 FET RF final amplifier
Q105~109 Transistor APC switch
Q110 FET PD switch
Q201 FET 1st mixer
Q202 FET RF AMP (RX)
Q301 Transistor Tripler (2nd local)
Q303 Transistor IF amplifier
Q401 FET RX VCO
Q402 FET TX VCO
Q403 Transistor Ripple filter
Q405 Transistor Buffer amplifier
Q406,407 FET T/R VCO switch
Q408 Transistor Buffer amplifier
Q501 FET DC switch (SB2)
Q502 FET DC switch control (SB2)
Q503 Transistor DC switch (50R)
Q505 Transistor DC switch (50T)
Q506,507 FET Level converter
Q509 Transistor DC/DC control (100C)
Q510 Transistor DC/DC control (38M)
Q511 Transistor DC switch control (50T)
Q512 FET DC switch (50CS)
Q602 FET DC switch (System)
Q901 Transistor DC switch (AF mute)
Q902 Transistor DC switch (AF PA amplifier)
Q903 Transistor DC switch (AF mute)
Q904,905 FET AF power mute
Q906 Transistor EXT/MIC switch
Q907 FET Level converter
D101 Zener diode APC protect
D102,103 Diode Antenna switch
D105,106 Diode Antenna switch
COMPONENTS DESCRIPTION

NX-320
19
Ref. No. Part Name Description
D201~204 Variable capaci-
tance diode BPF tune
D206,207 Variable capaci-
tance diode BPF tune
D401 Diode Bypass
D402 Variable capaci-
tance diode Assist tune
D403 Variable capaci-
tance diode TX VCO tune
D404 Variable capaci-
tance diode RX VCO tune
D405~409 Variable capaci-
tance diode Assist tune
D410 Variable capaci-
tance diode TX modulation
D411 Variable capaci-
tance diode Assist tune
Ref. No. Part Name Description
D412,413 Diode T/R switch
D414 Diode Speed up
D415 Variable capaci-
tance diode Assist tune
D501 Diode Reverse protection
D502 Diode Speed up
D505,506 Diode DC/DC converter
D508 Diode DC/DC converter
D509 Diode Reverse current protection
D511,512 Diode DC/DC converter
D901 Diode Reverse current protection
D902 Diode 50V switch control
COMPONENTS DESCRIPTION

NX-320
20
✽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
C: China X: Australia M: Other Areas
Ref. No. Address Parts No. Description Desti-
nation
New
parts
Ref. No. Address Parts No. Description Desti-
nation
New
parts
PARTS LIST
NX-320
DISPLAY UNIT (X54-3760-XX)
1 2B
✽A02-4130-03 PLASTIC CABINET ASSY K,K4,E3
2 2B
✽A02-4131-03 PLASTIC CABINET ASSY (4KEY) K2,K5,E2
3 1B
✽A02-4132-03 PLASTIC CABINET ASSY (16KEY) K3,K6,E
4 3A
✽A10-4148-01 CHASSIS
6 3A B01-0694-13 ESCUTCHEON
7 1C B09-0686-03 CAP ACCESSORY
8 3B B11-1869-04 ILLUMINATION GUIDE (TX/BUSY)
9 1A
✽B11-1890-04 FILTER (LCD) K2,K3,K5
9 1A
✽B11-1890-04 FILTER (LCD) K6,E,E2
10 1A
✽B11-1891-02 ILLUMINATION GUIDE (LCD) K2,K3,K5
10 1A
✽B11-1891-02 ILLUMINATION GUIDE (LCD) K6,E,E2
11 1A B38-0935-05 LCD K2,K3,K5
11 1A B38-0935-05 LCD K6,E,E2
12 1A B42-7417-04 STICKER
13 2D
✽B62-2292-00 INSTRUCTION MANUAL (K TYPE) K,K2,K3
13 2D
✽B62-2292-00 INSTRUCTION MANUAL (K TYPE) K4,K5,K6
14 2D
✽B62-2319-00 INSTRUCTION MANUAL (E TYPE) E,E2,E3
16 1B,1D
✽D32-0454-04 STOPPER (16CH)
18 3A E04-0467-15 RF COAXIAL RECEPTACLE (SMA)
19 2A
✽E23-1363-04 TERMINAL (ANT)
20 1A
✽E29-1232-05 INTER CONNECTOR (LCD) K2,K3,K5
20 1A
✽E29-1232-05 INTER CONNECTOR (LCD) K6,E,E2
21 1A
✽E37-1532-05
LEAD WIRE WITH CONNECTOR (SP/ECM)
22 2A
✽E37-1537-05 FLAT CABLE (TXRX-DISPLAY)
23 3A
✽E72-0435-03 TERMINAL BLOCK
25 2A
✽F10-3149-03 SHIELDING COVER
26 1A
✽G02-1864-04 EARTH SPRING (DISPLAY PCB)
27 1B
✽G09-0443-04 KNOB SPRING (VOL/SELECTOR)
28 1B
✽G10-1827-04 FIBROUS SHEET (SP)
29 1A G11-4272-14 RUBBER CUSHION (SP)
30 3A G11-4315-14 SHEET (FET)
31 1A G11-4335-14 SHEET (LCD) K2,K3,K5
31 1A G11-4335-14 SHEET (LCD) K6,E,E2
32 3A G11-4368-04 SHEET (TERMINAL BLOCK)
33 3A G11-4500-04 SHEET (AIR)
34 1A G11-4527-04 SHEET (SP)
35 3A
✽G11-4543-04 SHEET (PTT)
36 1A
✽G11-4558-04 SHEET (ECM)
37 3A
✽G11-4561-04 SHEET (CHASSIS:TX/BUSY)
38 1A
✽G11-4562-04 SHEET (SP HOLDER)
39 2A G13-2220-04 CUSHION (DISPLAY PCB)
40 3A G53-1603-04 PACKING (SMA)
41 3A G53-1832-03 PACKING (JACK)
42 2B
✽G53-1862-02 PACKING (TOP)
43 2B
✽G53-1863-01 PACKING K,K4,E3
44 2B
✽G53-1864-01 PACKING (4KEY) K2,K5,E2
45 1B
✽G53-1865-01 PACKING (16KEY) K3,K6,E
46 1A,3A
✽G53-1866-04 PACKING (TERMINAL,ECM)
47 1C
✽H12-4312-02 PACKING FIXTURE
48 3C
✽H52-2454-02 ITEM CARTON CASE K,K2,K3
48 3C
✽H52-2454-02 ITEM CARTON CASE K4,K5,K6
49 1D J19-5483-23 HOLDER ACCESSORY
50 1A
✽J19-5547-01 HOLDER (FG-SP)
51 1A
✽J21-8631-03 MOUNTING HARDWARE (LCD) K2,K3,K5
51 1A
✽J21-8631-03 MOUNTING HARDWARE (LCD) K6,E,E2
52 1D J29-0701-15 BELT CLIP ACCESSORY
53 3A J87-0027-05 FPC (LEAD FREE) (PTT)
54 2A
✽J87-0040-05 FPC (LEAD FREE) (VOL/SELECTOR)
56 1A
✽K29-9500-03 KNOB (PTT)
57 1B
✽K29-9501-03 BUTTON KNOB (SIDE1/SIDE2/AUX)
58 1B
✽K29-9485-03 KNOB (VOL)
59 1B
✽K29-9486-03 KNOB (SELECTOR)
A 3A N09-2438-05 BINDING HEAD SCREW (ANT)
B 3A
✽N09-6608-05 SPECIAL SCREW (CASE)
C 3A
✽N14-0864-04 CIRCULAR NUT (VOL)
D 3A
✽N14-0865-04 CIRCULAR NUT (SELECTOR)
E 3A N30-3006-43 PAN HEAD MACHINE SCREW (ESCUT)
F
1A,2A,3A N83-2005-48 PAN HEAD TAPTITE SCREW (PCB)
VR1 3A
✽R31-0685-05 VARIABLE RESISTOR (VOL)
S101 3A
✽S60-0448-05 ROTARY SWITCH (SELECTOR)
65 1A T07-0787-05 SPEAKER
-
✽X57-8050-12 SERVICE TX-RX UNIT K,K2,K3
-
✽X57-8050-13 SERVICE TX-RX UNIT K4,K5,K6
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✽X57-8050-13 SERVICE TX-RX UNIT E,E2,E3
D1 B30-2278-05 LED (RED/YELLOW)
D7-14 B30-2337-05 LED (YELLOW) K3,K6,E
D13,14 B30-2337-05 LED (YELLOW) K2,K5,E2
D18,19 B30-2210-05 LED (TLY) K2,K3,K5
D18,19 B30-2210-05 LED (TLY) K6,E,E2
C1 CK73HB1H471K CHIP C 470PF K
C2 CK73HB1H681K CHIP C 680PF K
C3 CC73HCH1H270J CHIP C 27PF J
C4 CK73HB1H471K CHIP C 470PF K
C5 CK73HB1A104K CHIP C 0.10UF K
C6 CK73HB1H102K CHIP C 1000PF K
C7,8 CC73HCH1H470J CHIP C 47PF J
C10 CC73HCH1H101J CHIP C 100PF J
C11 CK73HB1H681K CHIP C 680PF K
C13 CC73HCH1H101J CHIP C 100PF J
C15 CK73HB1E103K CHIP C 0.010UF K
C16 CK73HB1H102K CHIP C 1000PF K
C19 CK73HB1A104K CHIP C 0.10UF K
C20 CK73HB1H102K CHIP C 1000PF K
C21 CK73HB1E103K CHIP C 0.010UF K
C22 CK73HB1A224K CHIP C 0.22UF K
C23 CC73HCH1H470J CHIP C 47PF J
C25 CK73HB1A224K CHIP C 0.22UF K
C26 CC73HCH1H470J CHIP C 47PF J
C28,29 CC73HCH1H470J CHIP C 47PF J
C30 CK73HB0J105K CHIP C 1.0UF K
C31 CC73HCH1H470J CHIP C 47PF J
NX-320
DISPLAY UNIT (X54-3760-XX) -10: K3,K6,E -11: K2,K5,E2 -12: K,K4,E3