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VHF DIGITAL TRANSCEIVER
NX-220
SERVICE MANUAL
NX-220 K,E3
Helical antenna
(KRA-22: Option)
Knob (Selector)
(K29-9486-03)
Knob (Volume)
(K29-9485-03)
Knob (PTT)
Plastic cabinet assy
(K29-9500-03)
(A02-4130-03)
Button knob
(Side1/Side2/AUX)
(K29-9501-03)
Does not come with antenna.
Antenna is available as an option.
RoHS
This product complies with the
NX-220 K2,E2
Helical antenna
(KRA-22: Option)
Knob (Selector)
(K29-9486-03)
Knob (PTT)
(K29-9500-03)
Button knob
Packing (4Key)
(Side1/Side2/AUX)
(G53-1864-01)
(K29-9501-03)
directive for the European market.
© 2011-3 PRINTED IN JA PAN
B51-8962-00 ( N ) 405
NX-220 K3,E
Helical antenna
(KRA-22: Option)
Knob (Volume)
(K29-9485-03)
Plastic cabinet assy
Knob (PTT)
(A02-4131-03)
(K29-9500-03)
Button knob
(Side1/Side2/AUX)
(K29-9501-03)
Knob (Selector)
(K29-9486-03)
Knob (Volume)
(K29-9485-03)
Plastic cabinet assy
(A02-4132-03)
Packing (16Key)
(G53-1865-01)
This product uses Lead Free solder.
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Table of Contents
Related Manuals for Kenwood NX-220 E2
Summarization of Contents
GENERAL INFORMATION
INTRODUCTION AND SCOPE
Manual scope, intended audience, and ordering parts information.
PERSONAL SAFETY PRECAUTIONS
Precautions for safe operation and servicing.
SERVICE GUIDELINES
Guidance on servicing and referring to diagrams.
REALIGNMENT PROCEDURES
MODES AND OPERATION
Overview of transceiver modes and how to access them.
PC MODE SETUP
Procedures for PC connection and programming setup.
PROGRAMMING MODES AND CABLES
Details on programming interface cables and software.
FIRMWARE PROGRAMMING
Steps for upgrading transceiver firmware via PC.
CLONE MODE OPERATION
Procedure for transferring data between transceivers.
CLONE MODE PASSWORD AND FIRMWARE VERSION
Instructions on entering passwords for cloning and checking firmware version.
DISASSEMBLY FOR REPAIR
PRECAUTIONS FOR DISASSEMBLY
Safety and handling precautions before disassembling the unit.
KNOB AND SPRING REMOVAL
Step-by-step guide to remove volume and selector knobs and springs.
TX-RX UNIT REMOVAL
Detailed steps for removing the TX-RX unit from the chassis.
SPEAKER HOLDER AND TOP PACKING REMOVAL
Guide to removing the speaker holder and TOP packing.
REASSEMBLY PRECAUTIONS
Guidelines for reassembling the unit, including bonding and chassis mounting.
FLAT CABLE FORMING AND CHANNEL SELECTOR MODIFICATION
Instructions on forming flat cable and changing channel selector operation.
ANTENNA AND SP/MIC LEAD WIRE CONNECTION
Details on connecting the antenna hot pin and aligning the SP/MIC lead wire.
ASSEMBLY INFORMATION (SHEET/CUSHION)
Details on replacing main parts and required sheets/cushions.
CIRCUIT DESCRIPTION
OVERVIEW AND FREQUENCY CONFIGURATION
General description of the NX-220 and its frequency configuration.
RECEIVER SYSTEM RF CIRCUIT
Detailed explanation of the RF circuit in the receiver system.
IF, AUDIO AMPLIFIER, AND SQUELCH CIRCUITS
Explanation of IF, audio amplification, and squelch control circuits.
TRANSMITTER SYSTEM AUDIO CIRCUITS
Details on audio band and baseband circuits in the transmitter.
VOX, AMPLIFIER, AND PLL CIRCUITS
Explanation of VOX, amplifier, APC, and PLL frequency synthesizer circuits.
LOCAL SWITCH AND CONTROL CIRCUIT
Explanation of local switch and control circuits including ASIC.
MEMORY CIRCUIT
Description of flash memory and SRAM circuits.
LCD, KEY DETECTION, AND POWER SUPPLY CIRCUITS
Details on LCD control, key detection, power supply, and signaling circuits.
DSP CIRCUIT
Explanation of the Digital Signal Processor (DSP) circuit functions.
COMPONENTS DESCRIPTION
DISPLAY UNIT COMPONENTS
List of components for the display unit.
TX-RX UNIT COMPONENTS
List of components for the TX-RX unit.
PARTS LIST
CAPACITOR AND RESISTOR DETAILS
Detailed list of capacitors and resistors with specifications.
DISPLAY UNIT PARTS LIST
List of parts for the display unit with reference numbers and destinations.
TX-RX UNIT PARTS LIST
List of parts for the TX-RX unit with reference numbers and destinations.
DISPLAY UNIT COMPONENTS (CAPACITORS, CONNECTORS, RESISTORS)
Detailed list of capacitors, connectors, and resistors for the display unit.
DISPLAY UNIT COMPONENTS (SWITCHES, ICS, TRANSISTORS)
List of switches, ICs, transistors, and thermistors for the display unit.
TX-RX UNIT COMPONENTS (CAPACITORS)
List of capacitors for the TX-RX unit.
TX-RX UNIT COMPONENTS (CAPACITORS, DIODES, INDUCTORS, RESISTORS)
Detailed list of capacitors, diodes, inductors, and resistors for the TX-RX unit.
TX-RX UNIT COMPONENTS (CONNECTORS, FERRITES, ICS)
List of connectors, ferrites, and ICs for the TX-RX unit.
TX-RX UNIT COMPONENTS (INDUCTORS, RESISTORS, CHIPS)
Detailed list of inductors, resistors, and chips for the TX-RX unit.
TX-RX UNIT COMPONENTS (RESISTORS)
Detailed list of resistors for the TX-RX unit.
TX-RX UNIT COMPONENTS (RESISTORS, DIODES, ICS)
List of resistors, diodes, and ICs for the TX-RX unit.
TX-RX UNIT COMPONENTS (ICS, TRANSISTORS, THERMISTORS)
List of ICs, transistors, and thermistors for the TX-RX unit.
TROUBLE SHOOTING
BGA PARTS DIAGNOSIS AND POWER SUPPLY CHECK
Troubleshooting BGA ICs and associated voltage checks.
LCD DISPLAY AND ERROR INDICATORS
Troubleshooting based on LCD display status and error messages.
SIGNAL NAME DESCRIPTIONS
Definitions of signal names used in troubleshooting.
TX-RX UNIT REPLACEMENT AND DATA
Information on TX-RX unit replacement and associated data/labeling.
SERVICE TX-RX UNIT DATA AND LABELING
Details on service unit data, ESN labels, and PCB replacement procedures.
ADJUSTMENT (K TYPE)
PREPARATIONS AND PANEL TEST MODE
Setup, controls overview, and test mode operations for K type models.
FREQUENCY AND SIGNALING ADJUSTMENTS
Tables for test frequencies and analog/NXDN mode signaling adjustments.
PANEL TUNING MODE OPERATIONS
Procedures for entering and operating panel tuning mode for K2/K3 models.
ADJUSTMENT ITEM SUPPLEMENT
Detailed descriptions for each adjustment item and its purpose.
ADJUSTMENT ITEMS AND RANGES
Table summarizing adjustment items, ranges, and test modes.
PANEL TUNING MODE FLOW CHART
Visual flow chart detailing panel tuning mode operations.
TEST EQUIPMENT AND ACCESSORIES
Lists required test equipment and optional accessories for alignment.
RADIO CHECK SECTION
Procedures for frequency, power, and sensitivity checks.
MIC SENSITIVITY AND COMMON SECTION ADJUSTMENTS
Adjustments for microphone sensitivity and common section parameters.
RECEIVE, TRANSMIT ASSIST, AND FREQUENCY ADJUSTMENTS
Procedures for adjusting receive/transmit assist and frequency parameters.
TRANSMITTER POWER, BALANCE, AND NXDN DEVIATION ADJUSTMENTS
Adjustments for transmitter power, balance, and NXDN deviation.
MAXIMUM DEVIATION ADJUSTMENTS (NXDN AND ANALOG)
Adjustments for maximum deviation in NXDN and analog modes.
QT, DQT, AND LTR DEVIATION ADJUSTMENTS
Procedures for adjusting QT, DQT, and LTR deviation.
DTMF, SINGLE TONE, AND MSK DEVIATION ADJUSTMENTS
Adjustments for DTMF, single tone, and MSK deviation.
CW ID DEVIATION AND BATTERY WARNING LEVEL
Adjustments for CW ID deviation and battery warning level.
NECESSARY DEVIATION AND RECEIVER AF LEVEL SETTING
Deviation adjustment items and receiver AF level setting.
RECEIVER SENSITIVITY AND RSSI REFERENCE ADJUSTMENTS
Procedures for adjusting receiver sensitivity and RSSI reference.
OPEN SQUELCH AND LOW RSSI ADJUSTMENTS
Procedures for adjusting open squelch and low RSSI levels.
HIGH RSSI AND TIGHT SQUELCH ADJUSTMENTS
Procedures for adjusting high RSSI and tight squelch levels.
TIGHT SQUELCH ADJUSTMENTS (WIDE MODES)
Procedures for adjusting tight squelch in wide 4k and 5k modes.
ADJUSTMENT (E TYPE)
PREPARATIONS AND PANEL TEST MODE (E/E2 MODELS)
Setup, controls overview, and test mode operations for E/E2 models.
FREQUENCY AND SIGNALING ADJUSTMENTS (E TYPE)
Tables for test frequencies and analog/NXDN signaling adjustments for E type.
PANEL TUNING MODE OPERATIONS (E/E2 MODELS)
Procedures for entering and operating panel tuning mode for E/E2 models.
ADJUSTMENT ITEM SUPPLEMENT (E TYPE)
Detailed descriptions for each adjustment item and its purpose for E type.
ADJUSTMENT ITEMS AND RANGES (E TYPE)
Table summarizing adjustment items, ranges, and test modes for E type.
PANEL TUNING MODE FLOW CHART (E TYPE)
Visual flow chart detailing panel tuning mode operations for E type.
TEST EQUIPMENT AND ACCESSORIES (E TYPE)
Lists required test equipment and accessories for E type alignment.
RADIO CHECK SECTION (E TYPE)
Procedures for frequency, power, and sensitivity checks for E type.
MIC SENSITIVITY AND COMMON SECTION ADJUSTMENTS (E TYPE)
Adjustments for microphone sensitivity and common section parameters for E type.
RECEIVER AND TRANSMITTER ASSIST ADJUSTMENTS (E TYPE)
Procedures for adjusting receive/transmit assist and frequency parameters for E type.
MAXIMUM DEVIATION ADJUSTMENTS (NXDN AND ANALOG) (E TYPE)
Adjustments for maximum deviation in NXDN and analog modes for E type.
MAXIMUM DEVIATION (ANALOG WIDE 5K) ADJUSTMENT (E TYPE)
Procedure for adjusting maximum deviation for analog wide 5k mode for E type.
QT DEVIATION ADJUSTMENTS (E TYPE)
Procedures for adjusting QT deviation in narrow and wide modes for E type.
DQT DEVIATION ADJUSTMENTS (E TYPE)
Procedures for adjusting DQT deviation in narrow and wide modes for E type.
LTR DEVIATION ADJUSTMENTS (E TYPE)
Procedures for adjusting LTR deviation in narrow and wide modes for E type.
DTMF DEVIATION ADJUSTMENTS (E TYPE)
Procedures for adjusting DTMF deviation in narrow mode for E type.
DTMF DEVIATION ADJUSTMENTS (WIDE MODES) (E TYPE)
Procedures for adjusting DTMF deviation in wide 4k and 5k modes for E type.
SINGLE TONE AND MSK DEVIATION ADJUSTMENTS (E TYPE)
Adjustments for single tone and MSK deviation in narrow and wide modes for E type.
MSK DEVIATION ADJUSTMENTS (WIDE MODES) (E TYPE)
Procedures for adjusting MSK deviation in wide 4k and 5k modes for E type.
CW ID DEVIATION AND BATTERY WARNING LEVEL (E TYPE)
Adjustments for CW ID deviation and battery warning level for E type.
NECESSARY DEVIATION ADJUSTMENT ITEMS (E TYPE)
Table detailing necessary deviation adjustments per signaling mode for E type.
RECEIVER SECTION AF LEVEL SETTING (E TYPE)
Procedure for setting the AF level in the receiver section for E type.
RECEIVER SENSITIVITY AND RSSI REFERENCE ADJUSTMENTS (E TYPE)
Procedures for adjusting receiver sensitivity and RSSI reference for E type.
RSSI REFERENCE ADJUSTMENTS (ANALOG AND NXDN) (E TYPE)
Procedures for adjusting RSSI reference for analog and NXDN signals for E type.
OPEN SQUELCH ADJUSTMENT (E TYPE)
Procedures for adjusting open squelch levels for different modes for E type.
LOW RSSI ADJUSTMENT (E TYPE)
Procedures for adjusting low RSSI levels at –118dBm for E type.
HIGH RSSI AND TIGHT SQUELCH ADJUSTMENTS (E TYPE)
Procedures for adjusting high RSSI and tight squelch levels for E type.
TIGHT SQUELCH ADJUSTMENTS (WIDE MODES) (E TYPE)
Procedures for adjusting tight squelch in wide 4k and 5k modes for E type.
TERMINAL FUNCTION
DISPLAY UNIT TERMINALS
Pin assignments and functions for the display unit connectors.
TX-RX UNIT TERMINALS
Pin assignments and functions for the TX-RX unit connectors.
SP/MIC CONNECTOR SPECIFICATION
Detailed specifications for the SP/MIC connector signals and conditions.
PC BOARD DIAGRAMS
DISPLAY UNIT COMPONENT SIDE VIEW
Component layout diagram for the display unit.
DISPLAY UNIT COMPONENT REFERENCES
Reference numbers and addresses for components on the display unit.
DISPLAY UNIT FOIL SIDE VIEW
Foil side layout diagram for the display unit.
DISPLAY UNIT FOIL SIDE COMPONENT REFERENCES
Reference numbers and addresses for components on the display unit foil side.
TX-RX UNIT COMPONENT SIDE VIEW
Component layout diagram for the TX-RX unit.
TX-RX UNIT COMPONENT REFERENCES
Reference numbers and addresses for components on the TX-RX unit.
TX-RX UNIT FOIL SIDE VIEW
Foil side layout diagram for the TX-RX unit.
TX-RX UNIT FOIL SIDE COMPONENT REFERENCES
Reference numbers and addresses for components on the TX-RX unit foil side.
LEVEL DIAGRAM
RECEIVER SECTION LEVEL DIAGRAM
Signal level diagram for the receiver section.
TRANSMITTER SECTION LEVEL DIAGRAM
Signal level diagram for the transmitter section.
SCHEMATIC DIAGRAMS
DISPLAY UNIT SCHEMATIC (PAGE 1/2)
Schematic diagram for the display unit (part 1 of 2).
DISPLAY UNIT SCHEMATIC (PAGE 2/2)
Schematic diagram for the display unit (part 2 of 2).
DISPLAY UNIT BLOCK DIAGRAM
Block diagram illustrating the display unit's internal functions.
TX-RX UNIT SCHEMATIC (PAGE 1/8)
Schematic diagram for the TX-RX unit (part 1 of 8).
TX-RX UNIT SCHEMATIC (PAGE 2/8)
Schematic diagram for the TX-RX unit (part 2 of 8).
TX-RX UNIT SCHEMATIC (PAGE 3/8)
Schematic diagram for the TX-RX unit (part 3 of 8).
TX-RX UNIT SCHEMATIC (PAGE 4/8)
Schematic diagram for the TX-RX unit (part 4 of 8).
TX-RX UNIT SCHEMATIC (PAGE 5/8)
Schematic diagram for the TX-RX unit (part 5 of 8).
TX-RX UNIT SCHEMATIC (PAGE 6/8)
Schematic diagram for the TX-RX unit (part 6 of 8).
TX-RX UNIT SCHEMATIC (PAGE 7/8)
Schematic diagram for the TX-RX unit (part 7 of 8).
BLOCK DIAGRAM
DISPLAY UNIT BLOCK DIAGRAM
Block diagram illustrating the display unit's internal functions.
OPTIONAL ACCESSORIES
BATTERY PACKS (KNB-55L, KNB-56N, KNB-57L)
External views, schematic diagrams, and specifications for optional battery packs.
SPECIFICATIONS (K TYPE)
GENERAL SPECIFICATIONS (K TYPE)
General model, frequency, channel, and dimension specifications.
RECEIVER SPECIFICATIONS (K TYPE)
Receiver sensitivity, selectivity, and distortion specifications.
TRANSMITTER SPECIFICATIONS (K TYPE)
Transmitter power, spurious emission, and modulation specifications.
SPECIFICATIONS (E TYPE)
GENERAL SPECIFICATIONS (E TYPE)
General model, frequency, channel, and dimension specifications for E type.
RECEIVER SPECIFICATIONS (E TYPE)
Receiver sensitivity, selectivity, and distortion specifications for E type.
TRANSMITTER SPECIFICATIONS (E TYPE)
Transmitter power, spurious emission, and modulation specifications for E type.
PC BOARD DIAGRAMS
DISPLAY UNIT COMPONENT SIDE VIEW AND REFERENCES
Component layout and reference list for the display unit.
DISPLAY UNIT FOIL SIDE VIEW AND REFERENCES
Foil side component layout and reference list for the display unit.
TX-RX UNIT COMPONENT SIDE VIEW AND REFERENCES
Component layout and reference list for the TX-RX unit.
TX-RX UNIT FOIL SIDE VIEW AND REFERENCES
Foil side component layout and reference list for the TX-RX unit.
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