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Kenwood NX-300 E Service Manual
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Kenwood NX-300 E Service Manual

Kenwood NX-300 E Service Manual

Uhf digital transceiver
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UHF DIGITAL TRANSCEIVER
NX-300
SERVICE MANUAL
E version
NX-300 E
Knob (Selector)
(K29-9408-13)
Knob (Volume)
(K29-9407-03)
Badge
(B43-1606-04)
Knob (PTT)
(K29-9405-03)
Packing (18 key)
(G53-1766-11)
Plastic cabinet assy
(18 key)
(A02-4003-23)
Does not come with antenna. Antenna is available
as an option.
GENERAL ................................................................... 2
SYSTEM SET-UP ....................................................... 3
REALIGNMENT ......................................................... 3
INSTALLATION .......................................................... 7
DISASSEMBLY FOR REPAIR .................................... 8
CIRCUIT DESCRIPTION .......................................... 18
COMPONENTS DESCRIPTION ............................... 24
PARTS LIST ............................................................. 26
EXPLODED VIEW .................................................... 37
PACKING .................................................................. 38
TROUBLE SHOOTING ............................................ 39
ADJUSTMENT ........................................................ 43
This product complies with the
RoHS
Helical Antenna
(KRA-23: option)
CONTENTS
directive for the European market.
© 2009-1 PRINTED IN JA PAN
B51-8859-00 ( N ) 157
NX-300 E4
TERMINAL FUNCTION ........................................... 68
PC BOARD
CONTROL UNIT (X53-4262-XX) ........................ 76
TX-RX UNIT (X57-7370-11) ............................... 80
INTERCONNECTION DIAGRAM ............................ 84
SCHEMATIC DIAGRAM .......................................... 86
BLOCK DIAGRAM ................................................ 100
LEVEL DIAGRAM ................................................. 104
OPTIONAL ACCESSORIES
KNB-47L (Li-ion Battery Pack) ........................ 105
KNB-48L (Li-ion Battery Pack) ........................ 105
SPECIFICATIONS ................................. BACK COVER
Knob (Selector)
(K29-9408-13)
Knob (Volume)
(K29-9407-03)
Badge
(B43-1606-04)
Knob (PTT)
(K29-9405-03)
Packing (6 key)
(G53-1765-11)
Plastic cabinet assy
(6 key)
(A02-4002-23)
This product uses Lead Free solder.

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Summary of Contents for Kenwood NX-300 E

  • Page 1 UHF DIGITAL TRANSCEIVER NX-300 SERVICE MANUAL E version © 2009-1 PRINTED IN JA PAN B51-8859-00 ( N ) 157 NX-300 E NX-300 E4 Helical Antenna (KRA-23: option) Knob (Selector) Knob (Selector) (K29-9408-13) (K29-9408-13) Knob (Volume) Knob (Volume) (K29-9407-03) (K29-9407-03) Badge...
  • Page 2 fi rmware under the license of Digital Voice Systems, ages resulting from the use of the information contained Inc. herein. Kenwood reserves the right to make changes to any products herein at any time for improvement purposes. GENERAL...
  • Page 3 SYSTEM SET-UP Merchandise received Frequency range (MHz) RF power Type DTMF keypad TX/RX 400~470 NX-300 E Choose the type of transceiver TX/RX 400~470 NX-300 E4 A personal computer, programming interface (KPG-36/36A), USB adapter (KCT-53U), and programming software (KPG-111D) Transceiver programming are required for programming.
  • Page 4 NX-300 REALIGNMENT 5-2. Connection procedure 2. How to Enter Each Mode 1. Connect the transceiver to the computer using the inter- Mode Operation face cable and USB adapter (When the interface cable is User mode Power ON KPG-36A, the KCT-53U can be used.). Panel test mode [ ] + Power ON Note:...
  • Page 5 NX-300 REALIGNMENT 6-2. Connection procedure 7. Clone Mode Connect the transceiver to the personal computer using Programming data can be transferred from one trans- the interface cable (KPG-36/36A) and USB adapter (KCT-53U: ceiver to another by connecting them via their external uni- when the interface cable is KPG-36A, the KCT-53U can be versal connectors.
  • Page 6 NX-300 REALIGNMENT Cloning cable If you press the [ ] key after entering the password in (E30-3325-05) this procedure, “CLONE MODE” is displayed if the en- tered password is correct. If the password is incorrect, “CLONE LOCK” is redisplayed. 4. Power ON the target transceiver. 5.
  • Page 7 NX-300 INSTALLATION Voice Guide & Storage Unit (VGS-1: Option) OPTION PCB ■ Installing the VGS-1 (Voice Guide & Storage Unit) in the transceiver 1. Remove the bond from between the chassis and the screw for the option board cover using a pair of twee- CN710 zers.
  • Page 8 NX-300 DISASSEMBLY FOR REPAIR Perform the following work when you restore the water- 1. Precautions for Waterproof proof performance of the transceiver at the IP67 level after • Do not remove the black sheet from the reverse side of the transceiver is repaired. the transceiver (refer to the illustration below).
  • Page 9 NX-300 DISASSEMBLY FOR REPAIR ■ Removing the TOP packing (G53-1762-02) 1. Pull the TOP packing to the left to remove the packing that is fi t into the left groove of the chassis q. 2. Pull the TOP packing to the right to remove the packing that is fi...
  • Page 10 NX-300 DISASSEMBLY FOR REPAIR 2) Move the TOP packing as shown in the fi gure, and at- tach it to the chassis q. 3) Fit the TOP packing into the right groove of the chas- sis w. 4) Fit the TOP packing into the left groove of the chassis 2.
  • Page 11 NX-300 DISASSEMBLY FOR REPAIR Note: Prying it with a pointed metal tool such as forceps, may Fold indications are printed on the Cord ASSY and Uni- damage the key top or packing. versal Connector FPC. “––––” line shows creased line on the top. 18-key part “- - - -”...
  • Page 12 NX-300 DISASSEMBLY FOR REPAIR ■ Relay hardware (E29-1221-14) installation proce- ■ Changing the channel selector from 16-channel dure operation to free 1. Fit one side of the relay hardware to a right corner of the 1. Remove the channel selector knob. chassis using a pair of tweezers q.
  • Page 13 Part Number Remark Sticker B42-7296-04 “NXDN” is printed. Plastic Cabinet (6-key) A02-4002-23 Badge B43-1606-04 “KENWOOD” is printed. Plastic Cabinet (18-key) A02-4003-23 Fibrous Sheet (SP) G10-1373-04 Used for fi xing the LCD ASSY on the Illumination Guide (LCD). LCD ASSY B38-0923-05...
  • Page 14 NX-300 DISASSEMBLY FOR REPAIR 4. Water-resistant Inspection Method Black sheet (G11-4440-04) Preparation Water-resistant sheet (G11-4331-04) • Water-resistant Inspection Jig (W05-1499-00) vacuum/ pressure meter hose adapter valve 3) There is a screw hole under the water-resistant sheet. Insert the hose adapter into this screw hole while turning it w.
  • Page 15 NX-300 DISASSEMBLY FOR REPAIR Note: cm (7.87 inch) from the bottom of the container. The wa- Do not push the piston with the pump inserted in the ter temperature must be between 10ºC (50ºF) and 30ºC hose because the meter needle of the water-resistant (86ºF).
  • Page 16 NX-300 DISASSEMBLY FOR REPAIR The meter needle will move down gradually due to air New black sheet leakage. Place the transceiver into the water before it reaches 5kPa. New water-resistant sheet Air leakage can be confi rmed by air bubbles. When the meter needle indicates 3 to 4kPa (right side of meter), perform steps a) to e) in 3) above to increase the pres- sure to approximately 10kPa.
  • Page 17 NX-300 DISASSEMBLY FOR REPAIR ■ Parts list concerning the waterproof of each leakage location LCD Display, Front Key, Speaker, ANT, Volume Knob, Selector Knob, The space of the Front panel and the chassis The space of the TOP panel and the chassis Part Name Part Number Part Name...
  • Page 18 NX-300 CIRCUIT DESCRIPTION 1. Overview 2. Frequency Confi guration The NX-300 is a UHF portable transceiver designed to The receiver is a double-conversion superheterodyne operate in the frequency range of 400 to 470MHz. The unit using the first intermediate frequency (IF) of 58.05MHz consists of receiver, transmitter, phase-locked loop (PLL) and the second IF of 450kHz.
  • Page 19 NX-300 CIRCUIT DESCRIPTION 3-3. Audio Amplifi er Circuit 3-4. Squelch Circuit Audio processing (high-pass filter, low-pass filter, de- It amplifies the demodulated noise signal from IC108 emphasized and so on) at FM mode and decoding at NXDN after filtering through the BPF circuit. Then, the amplified mode are processed by DSP.
  • Page 20 NX-300 CIRCUIT DESCRIPTION 4-3. VOX 4-5. APC Circuit IC716 (2/2) amplifi es the audio signal captured in the mi- The APC circuit always monitors the current flowing crophone. The signal is then converted into the DC voltage, through the RF power amplifi er (Q606) and keeps a constant rectifi...
  • Page 21 NX-300 CIRCUIT DESCRIPTION 5-3. PLL IC (IC502) The desired frequency is set for the PLL IC by the ASIC (IC108) through the 3-line “SDO1”, “SCK1”, “/PCS_RF” The PLL IC compares the differences in phases of the serial bus. Whether the PLL IC is locked or not is monitored VCO oscillation frequency and the VCTCXO reference fre- by the ASIC through the “PLD”...
  • Page 22 NX-300 CIRCUIT DESCRIPTION 6-2. Memory Circuit 6-6. DSP The memory circuit consists of the ASIC (IC108) and the The DSP circuit consists of a DSP (IC102) and processes SRAM (IC103) and fl ash memory (IC101). The fl ash memory the base band signal. The DSP operates on an external clock has capacity of 32M-bit that contains the transceiver control of 18.432MHz (the same as the IC108), the I/O section op- program for the ASIC and stores the data.
  • Page 23 NX-300 CIRCUIT DESCRIPTION 8. Signaling Circuit TX-RX unit (X57) F900 RF Final AMP 8-1. Encode (QT/DQT/LTR/DTMF/2-tone/MSK) 2.5A Each signaling data signal of QT, DQT, LTR, DTMF, 2-tone IC902 /SAVE and MSK is generated by the DSP circuit, superposed on Q905 a modulation signal and output from IC108.
  • Page 24 NX-300 COMPONENTS DESCRIPTION Control unit (X53-4262-XX) Ref. No. Part Name Description Ref. No. Part Name Description Q103 12key backlight switch LCD contrast Q401,402 Level converter IC101 FLASH ROM Q403 Transistor SB2 switch Q404 SB2 switch control IC102 IC103 SRAM Q405 AF AMP switch IC104 2 input AND gate...
  • Page 25 NX-300 COMPONENTS DESCRIPTION TX-RX unit (X57-7370-11) Ref. No. Part Name Description Ref. No. Part Name Description Q704 Transistor Ripple fi lter IC404 OP AMP (RSSI/VAGC) Q705 RF AMP IC500 Temperature sensor Q706 RF AGC IC501 AF AMP for TCXO MOD Q900 Transistor TX/RX LED switch...
  • Page 26 NX-300 PARTS LIST PARTS LIST ✽ New Parts. indicates safety critical components. L : Scandinavia K : USA P : Canada Parts without Parts No. are not supplied. Y : PX (Far East, Hawaii) T : England E : Eu rope Les articles non mentionnes dans le Parts No.
  • Page 27 NX-300 PARTS LIST CONTROL UNIT (X53-4262-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation CC73HCH1H101J CHIP C 100PF C442 CK73HB1H471K CHIP C 470PF CC73HCH1H221J CHIP C 220PF C443 CK73HB1E103K CHIP C 0.010UF...
  • Page 28 NX-300 PARTS LIST CONTROL UNIT (X53-4262-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C757,758 CK73GB0J475K CHIP C 4.7UF L409-411 L92-0467-05 CHIP FERRITE C759,760 CK73HB1E103K CHIP C 0.010UF L701 L92-0140-05 CHIP FERRITE...
  • Page 29 NX-300 PARTS LIST CONTROL UNIT (X53-4262-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R141-143 RK73HB1J104J CHIP R 100K 1/16W R446 RK73HB1J274J CHIP R 270K 1/16W R144 RK73HB1J471J CHIP R 1/16W R447...
  • Page 30 NX-300 PARTS LIST CONTROL UNIT (X53-4262-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R717-722 RK73HB1J104J CHIP R 100K 1/16W R799 RK73HB1J334J CHIP R 330K 1/16W R723 RK73HB1J105J CHIP R 1.0M 1/16W...
  • Page 31 NX-300 PARTS LIST CONTROL UNIT (X53-4262-XX) TX-RX UNIT (X57-7370-11) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation D101 MA2S111-F DIODE Q3,4 SSM3K15TE (F) D102 1SS416 DIODE 2SJ347F D401-405 1SS388F DIODE Q101...
  • Page 32 NX-300 PARTS LIST TX-RX UNIT (X57-7370-11) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C539 CS77BA1D100M CHIP TNTL 10UF 20WV C632 CK73HB1H471K CHIP C 470PF C541 C92-0863-05 CHIP TNTL 0.047UF 35WV C634-637...
  • Page 33 NX-300 PARTS LIST TX-RX UNIT (X57-7370-11) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C744,745 CK73HB1H471K CHIP C 470PF C925-943 CC73HCH1H470J CHIP C 47PF C746 CC73HCH1H090B CHIP C 9.0PF C944 CK73HB1H471K...
  • Page 34 NX-300 PARTS LIST TX-RX UNIT (X57-7370-11) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation L606 L41-1875-43 SMALL FIXED INDUCTOR (18NH) R552 RK73HB1J104J CHIP R 100K 1/16W L607 L92-0149-05 CHIP FERRITE R554,555 RK73HB1J473J...
  • Page 35 NX-300 PARTS LIST TX-RX UNIT (X57-7370-11) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R646 RK73HB1J333J CHIP R 1/16W R762 RK73HB1J103J CHIP R 1/16W R647 RK73EB2ER39K CHIP R 0.39 1/4W R763...
  • Page 36 NX-300 PARTS LIST TX-RX UNIT (X57-7370-11) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R955-958 RK73HB1J000J CHIP R 1/16W Q704 2SC5383-T111 TRANSISTOR Q705 3SK318 S70-0483-05 TACT SWITCH Q706 2SK1830F Q900 UMG9N...
  • Page 37 NX-300 EXPLODED VIEW Control unit (X53) Optional board unit (X57 B/2) Hx10 TX-RX unit (X57 A/2) : N08-0564-04 : N09-2426-14 : N09-2440-15 : N09-6549-04 : N09-6554-05 : N14-0844-04 H M2 x 5 : N83-2005-48 Parts with the exploded numbers larger than 700 are not supplied. If a part reference number is listed in a box on the exploded view of the PCB, that part does not come with the PCB.
  • Page 38 NX-300 PACKING 60 Belt clip (B09-0712-03) (J29-0730-05) 53 Packing (Cap) (G53-1769-04) G Pan head machine screw (N30-3008-60)x2 A Dressed screw (N08-0564-04) 15 Instruction manual (B62-2153-00) 14 Instruction manual (B62-2117-00) Parts with the exploded numbers larger than 700 are not supplied.
  • Page 39 NX-300 TROUBLE SHOOTING Fault Diagnosis of the BGA (Ball Grid Array) IC ■ Overview A fl owchart for determining whether or not the transceiver can be powered on (the LCD does not function even if the power switch is turned on) due to broken BGA parts. ■...
  • Page 40 NX-300 TROUBLE SHOOTING When a normal ● Checking the output signal value is confirmed. from the ASIC When an abnormal value is confirmed. Points to be checked Normal voltage Remove R432. If the ASIC side is 0V, SBC R432 3.3V the ASIC/FLASH/SRAM may be broken.
  • Page 41 Model Name: [X53-426] NX-xxxS The shielding plate is soldered Kenwood ESN Type: Ex on the Service Control unit The same number as the Kenwood (X53-4262-73/X53-4262-74). ESN label is written. NXDN ESN/ The same number as the NXDN ESN/ MPT ESN MPT ESN label is written.
  • Page 42 ESN Lable to reprogram the NXDN ESN number. (Not used) • When a new printed circuit board is used, the Kenwood ESN changes, as does the Transceiver Information dis- (Not used) play of the KPG-111D, but this does not have any effect on the operation of the transceiver.
  • Page 43 NX-300 ADJUSTMENT ■ Key operation • LED indicator Red LED Lights during transmission. “FNC” not appears on the sub LCD display Green LED Lights when there is carrier. Function Display • Sub LCD indicator [Selector] - “FNC” Appears at function on. Push: Test channel up Hold: Test channel up Channel No.
  • Page 44 NX-300 ADJUSTMENT • Analog mode signaling • LCD display in panel tuning mode CV voltage, AD value, etc None None None 100Hz Square Wave Sub LCD display CNTR LTR Data: LTR Data: Main LCD display AREA=0, GOTO=12 AREA=0, GOTO=12 HOME=12 HOME=12 Adjustment Adjustment value...
  • Page 45 NX-300 ADJUSTMENT ■ Adjustment item supplement Adjustment Item Description LCD contrast The contrast of LCD display can be changed. “Counterclockwise Volume” is adjusted at the minimum volume position. Counterclockwise Volume “Clockwise Volume” is adjusted at the maximum volume position. These adjustments can correct the volume variation. Both “Counterclockwise Volume”...
  • Page 46 NX-300 ADJUSTMENT ■ Adjustment item and Display Aw (Analog As (Analog An (Analog Nn (NXDN Nv (NXDN Adjusutment Main LCD Very Narrow) Adjust item Wide 5k) Wide 4k) Narrow) Narrow) Order Sub LCD display item display Number Adjustment range 1 point ADJ Common LCD contrast CNTR...
  • Page 47 NX-300 ADJUSTMENT Aw (Analog As (Analog An (Analog Nn (NXDN Nv (NXDN Adjusutment Main LCD Very Narrow) Adjust item Wide 5k) Wide 4k) Narrow) Narrow) Order Sub LCD display item display Number Adjustment range (RSSI measurement Receive Sensitivity 2 SENS2 value) Section 3 1~256...
  • Page 48 NX-300 ADJUSTMENT [Side2] [Side2] [Side2] Analog MAX Deviation Analog MAX Deviation Wide Analog MAX Deviation Wide Narrow ADEV ADEV ADEV ] press ] hold 5 reference level Adjustments [Side2] [Side2] [Side2] QT Deviation QT Deviation Wide QT Deviation Wide Narrow ] press ] hold [Side2]...
  • Page 49 Li-ion High Capacity Battery: R1=Open In order to turn the volume nut and the channel selector Li-ion Normal Capacity Battery: R1=560kΩ nut, use a recommendation tool. KENWOOD part No.: W05-1123-00 Schematic diagram ■ Battery jig (W05-1370-00) –Terminal Connect the power cable properly between the battery...
  • Page 50 NX-300 ADJUSTMENT ■ Universal connector BLU (7) To transceiver PTT SW Use the interface cable (KPG-36/36A) for PC tuning or the lead wire with plug (E30-3287-28) and screw (N08-0535- BRN (10) 08) for panel tuning. Connect the plug to the universal con- nector of the transceiver and tighten the screw.
  • Page 51 NX-300 ADJUSTMENT Radio Check Section Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel test mode PC test mode Unit Terminal Unit Parts Method equipment 1. Frequency 1) CH-Sig: 1-1 1) Test Channel f. counter Panel Check an internal +0.05/+0.55ppm check PTT: ON...
  • Page 52 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel test mode PC test mode Unit Terminal Unit Parts Method equipment 5. Sensitivity 1) CH-Sig: 1-1 1) Test Channel Check 12dB SINAD or check SSG output Channel: 1 AF VTVM Universal more...
  • Page 53 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 4. Clockwise 1) Adj item: [VOL2] 1) Adj item: [Clock- Panel [Panel tuning mode] This item is needed Volume Adjust: [✳✳✳] wise Volume]...
  • Page 54 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 7. Frequency * The Frequency 1) Adj item: Panel Panel [Side1] [PC test mode] [PC test mode] adjust adjustment can be [Frequency]...
  • Page 55 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 3. Balance 1) Adj item: [BAL] 1) Adj item: [Balance] Deviation Panel Panel [Panel The Deviation of 2kHz Tone deviation adjust *2 Adjust: [✳✳✳]...
  • Page 56 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 5. Maximum 1) Adj item: [An ADEV] 1) Adj item: [Maximum Deviation Panel Panel [Panel Write the same 2050~2150Hz Deviation Adjust: [✳✳✳✳]...
  • Page 57 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 6. QT 1) Adj item: [An QT] 1) Adj item: [QT Devia- Deviation Panel Panel [Panel Write the value as 0.35kHz±0.05kHz Deviation Adjust: [✳✳✳✳]...
  • Page 58 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 8. LTR 1) Adj item: [An LTR] 1) Adj item: [LTR Deviation Panel Panel [Panel Write the value as 0.75kHz±0.05kHz Deviation Adjust: [✳✳✳✳]...
  • Page 59 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 10. Single 1) Adj item: [An TONE] 1) Adj item: [Single Deviation Panel Panel [Panel Write the value as 1.50kHz±0.05kHz Tone Adjust: [✳✳✳✳]...
  • Page 60 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 12. CWID 1) Adj item: [Nv CWID] 1) Adj item: [CW ID Deviation Panel Panel [Panel Write the value as 1.10kHz±0.10kHz Deviation Adjust: [✳✳✳✳]...
  • Page 61 NX-300 ADJUSTMENT ■ Necessary Deviation adjustment item for each signaling and mode The following shows the necessary adjustment items for each signaling deviation. Please read the following table like the following example. In the case of the signaling “QT (Wide 5k)”, this signaling is composed of three elements [Balance, Maximum Deviation (Analog Wide 5k) and QT Deviation (Wide 5k)].
  • Page 62 NX-300 ADJUSTMENT Receiver Section Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 1. AF level [Panel test mode] 1) Test Channel Panel Panel Volume Turn the Volume 0.63V±0.1V setting 1) CH-Sig: 1-1...
  • Page 63 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 3. Sensitivity 2 1) Adj item: [SENS2] 1) Adj item: Panel Panel [Panel Decrease the adjust Adjust: [✳✳✳] [Sensitivity 2] AF VTVM Universal...
  • Page 64 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment RSSI 1) Adj item: [Nv 1) Adj item: [RSSI Ref- Panel [Panel tuning mode] Adjust with the ana- reference RRSSI] erence (NXDN Very...
  • Page 65 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment Open 1) Adj item: [Nv SQL] 1) Adj item: [Open Panel [Panel tuning mode] Adjust with the ana- Squelch Adjust: [✳✳✳] Squelch (NXDN...
  • Page 66 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment Low RSSI 1) Adj item: [Nv 1) Adj item: [Low Panel [Panel tuning mode] Adjust with the ana- at –118dBm LRSSI] RSSI (NXDN Very...
  • Page 67 NX-300 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment High RSSI 1) Adj item: [Nv 1) Adj item: [High Panel [Panel tuning mode] Adjust with the ana- at –80dBm HRSSI] RSSI (NXDN Very...
  • Page 68 NX-300 TERMINAL FUNCTION Control unit (X53-4262-XX) Pin No. Name Function Pin No. Name Function Power output after passing through the fuse Chip select output Power input after power switch /RES LCD reset output CN404 Address bus 0 output LED_G Green LED control output WR bus output /EMG Emergency (Orange) key input...
  • Page 69 NX-300 TERMINAL FUNCTION Pin No. Name Function Pin No. Name Function Thermistor voltage input OPT2 PLL lock detect input 38M output RXEO Refer to “CN710 26-pin connector SCK1 PLL clock output RXEI specifi cation” described on pages 72 to 74. S_DET Battery select input OPT6...
  • Page 70 NX-300 TERMINAL FUNCTION Option board unit (X57-7370-11 B/2) Pin No. Name Function Side_G Key matrix input (SIDE1,2 key) Pin No. Name Function CN737 Side_1 Key matrix output (SIDE1 key) OPT1 W_/N No connection SDO1 PLL serial data input OPT3 26P_RD Side_2 Key matrix output (SIDE2 key) /PCS_RF...
  • Page 71 NX-300 TERMINAL FUNCTION Universal connector Rating and Condition Signal Pin No. Name I/O Function Type Parameter Unit EXT/INT speaker switch input Digital L: External speaker ON H: Internal speaker ON [8Ω load] Max output power (1kHz, Batt=7.5V) Analog BTL output + for external speaker [8Ω...
  • Page 72 NX-300 TERMINAL FUNCTION CN710 26-pin connector specifi cation Rating and Condition Pin No. Name Signal Type Parameter Unit OPT1 [Input] VIH OPT4 [Input] VIL OPT5 Digital [Output] VOH OPT8 [Output] VOL OPT11 OPT3 [Input] VIH OPT7 [Input] VIL Digital OPT2 [Output] VOH OPT6 [Output] VOL...
  • Page 73 NX-300 TERMINAL FUNCTION Rating and Condition Pin No. Name Signal Type Parameter Unit Output Amplitude (1kHz, 60% deviation) mVp-p Coupling Capacitor µF RXEO Analog Output Impedance 2.2k Ω Allowable Frequency 3000 Input Amplitude (1kHz, 60% deviation) mVp-p Coupling Capacitor µF RXEI Analog Input Impedance...
  • Page 74 NX-300 TERMINAL FUNCTION Pin No. Name Device Connection Function ANI board 26P_TD VGS-1 Serial data output ANI board PTT signal output OPT4 VGS-1 Enable ANI board OPT10 VGS-1 USEL UART speed select output ANI board Emergency Emergency signal output OPT5 VGS-1 Reset output ANI board...
  • Page 75 NX-300 TERMINAL FUNCTION CN737 Option board connector specifi cation Pin No. Name Device Connection Function [COR] Conv/LTR L: Activity receiving H: Not activity receiving [TOR] Conv/LTR L: Activity receiving (Sub Tone or LTR ID is OK) OPT1 ANI board Aux Output H: Not activity receiving [LOK] Conv...
  • Page 76 NX-300 PC BOARD CONTROL UNIT (X53-4262-XX) -71: E4 -72: E Component side view (J79-0131-29) J79-0131-29 Ref. No. Address Ref. No. Address Ref. No. Address IC415...
  • Page 77 NX-300 PC BOARD CONTROL UNIT (X53-4262-XX) -71: E4 -72: E Component side view (J79-0131-29) CN22 CN23 /RES R406 C452 R500 CN24 Component side Layer 1 Layer 2 Layer 3 Layer 4 Layer 5 Layer 6 Foil side...
  • Page 78 NX-300 PC BOARD CONTROL UNIT (X53-4262-XX) -71: E4 -72: E Foil side view (J79-0131-29) R402 D409 L719 R472 R496 R442 C429 Q405 L410 R474 C440 IC413 C415 + R462 L401 R133 R489 C437 C416 R132 R471 C438 R490 R495 C806 C424 R140 R484...
  • Page 79 NX-300 PC BOARD CONTROL UNIT (X53-4262-XX) -71: E4 -72: E Foil side view (J79-0131-29) R735 Q102 Q101 C712 R750 R112 R117 R114 R745 IC707 C115 R106 R793 C717 C722 R829 C767 R758 R755 R108 R753 C745 L710 C108 C118 D101 R847 R414 C731...
  • Page 80 NX-300 PC BOARD TX-RX UNIT (X57-7370-11) (A/2) Component side view (J79-0128-39 A/2) C630 C646 C640 R652 R653 R641 Q504 Q607 L503 C542 R538 C533 C653 R659 R660 R657 C987 C534 R566 R664 R534 R531 L530 C543 R658 R550 IC503 L504 R532 R523 R536...
  • Page 81 NX-300 PC BOARD TX-RX UNIT (X57-7370-11) (A/2) Component side view (J79-0128-39 A/2) C640 R648 R651 C641 C945 Side_G Side_1 R654 C971 C943 Side_2 C636 R655 TX-RX UNIT C913 C976 R921 (X57-7370-11) (B/2) Q608 Q905 R922 R659 C964 RXEO OPT9 D901 R908 D902 F900...
  • Page 82 NX-300 PC BOARD TX-RX UNIT (X57-7370-11) (A/2) Foil side view (J79-0128-39 A/2) C988 L614 TX-RX UNIT (X57-7370-11) (B/2) C609 C668 C665 CN601 J79-0128-39 B/2 L612 C663 CN600 C662 C664 D709 C954 26 POW OPT6 C803 D711 RXEI R915 C952 L725 RXEO R931 OPT2...
  • Page 83 NX-300 PC BOARD TX-RX UNIT (X57-7370-11) (A/2) Foil side view (J79-0128-39 A/2) C645 C643 L610 R575 C648 L514 C642 C556 C557 R646 C632 L516 L515 C635 C547 L517 C545 D517 R559 D515 L509 C566 Q606 L518 L519 Q603 CN601 D519 C568 R561 C575...
  • Page 84 NX-300 INTERCONNECTION DIAGRAM POWER SW/ CHANNEL SWITCH UNIT AF VOL SELECTOR X41-372 6KEY/SP/MIC CN403 CN23 /RES CONTROL PCB X53-426 CN701 CN710 CN405 CN737 UNIVERSAL CONNECTOR OPTION PCB X57-737 B/2...
  • Page 85 NX-300 INTERCONNECTION DIAGRAM CORD ASSY CN404 CN900 X42-334 LED_G LED_G /EMG /EMG LED_R LED_R /SAVE /SAVE I2CCK I2CCK /5TC /5TC I2CSDA I2CSDA /T_R /T_R ASSIST ASSIST SWITCH UNIT VAGC VAGC X41-371 TCXO_MOD TCXO_MOD PGND CN901 RSSI RSSI PGND AGND Side_G Side_1 Side_1 Side_2...
  • Page 86 NX-300 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4262-XX) R406 /LCDRST IC402 R407 TC7WZ245FK-F LCD CONTRAST NJM2130F3-ZB R408 IC401 TC74LCX245FK -7.13V 3.28V 100p C402 0.1u /CS4 C405 2.2u16 IC401,402 BUS SW IC403 -9.74V LM2682MMX C403 4.92V 2.2u16 C401 R409 0.1u L707 VoUT VOLTAGE DOUBLING INVERTER D101,Q101-103...
  • Page 87 NX-300 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4262-XX) X2_CLKIN L712 R126 100 MCDIAF R127 0 DVSS7 R128 0 BCLKX1 MCSCKAF R135 100k CVSS8 FSDET CVDD5 C119 1u R141 100k INT3 INT3 CVSS9 INT2 DVDD5 C101 INT1 /DINT R150 1k 0.1u INT0 /SYMTIM R142 100k 33MDSP /DWUP...
  • Page 88 NX-300 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4262-XX) GPIo7 ASQDET AUD_IREFC X2_CLKIN AD12_IREFF R158 XTALI XTALo CN104 DSPCK /RINT USRCKI ADD0 ADD1 ADD2 ADD3 ADD4 ADD5 L713 ADD6 ADD7 IC107 BUFFER ADD8 SM5023CNDH-G X102 ADD9 18.432MHz ADD10 C130 ADD11 oUTPUT 0.01u ADD12 R165 INHN ADD13...
  • Page 89 NX-300 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4262-XX) GPIo7 GPIo7 33A-1 IC108 ASIC R470 IFADCN 33MAS 33MAS 33A-1 33A-1 SPCS10 SPCS10 RESET X53-426 4/10...
  • Page 90 NX-300 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4262-XX) C459 GPIo7 L101 470p 33A-1 C460 L102 VOL SW/ENC 6800p C461 POWER SW/AF VOL 470p DGND3 CN403 R501 DGND2 DGND1 2.2k L714 R506 VOL_GND DVDIo7 L403 2.2k L716 DVDIo6 DVDIo5 R510 CHANNEL SELECTOR ENC3 DVDIo4 R509 AGND...
  • Page 91 NX-300 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4262-XX) D702 R819 MA2S111-F R790 CONTROL ASQDET Q701 R798 100k 2SA1832(GR)F C719 OPT10 C755 47p 0.1u R803 OPT SW R747 ASQ DET NOISE ASQAPC IC711 DETECTOR TC75W51FK(F) D705 R824 SQL BPF/ RB706F-40 R739 C716 SQL DC AMP R809 C771 680p...
  • Page 92 NX-300 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4262-XX) R : 5.14V Q406 Q406,407 2SB1132(Q,R) R471 VOLTAGE REGULATOR (AF AMP) R496 100k Q407 UMG3N Q405 IC413 AUDIO AF AMP SW TPA6201A1DRBR R459 SHUTDoWN Q405 C440 0.1u SSM6N16FE-F BYPASS C437 R489 D409 0.056u MA2S111-F SP CONTROL C438 R490...
  • Page 93 NX-300 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4262-XX) SWITCH UNIT (X41-3720-10) CN23 AGND R20 1k 6_/KEYI0 6_/KEYI0 R21 1.2k BL_SB BL_SB R22 1k 6_KEYO1 6_KEYO1 6KEY R23 1k 6_KEYO0 6_KEYO0 R25 1.2k BL_SB R24 1k 6_KEYO2 6_KEYO2 R26 1k 6_/KEYI1 6_/KEYI1 D18,19 SURGE ABSORPTION R846...
  • Page 94 NX-300 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4262-XX) D405,406,IC407 VOLTAGE REGULATOR (33M) DC/DC CONVERTER L402 L401 IC404 XC6204B332D 3.284V VOUT R438 3.82V 100k L702 IC407 R456 LT1616ES6-PBF 470k R439 D416 100k Q402 R548 47K SSM6N16FE-F D416 LEVEL CONVERTER 33A CONTROL R435 100k DC/DC CONVERTER (15M) R454 IC717...
  • Page 95 NX-300 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4262-XX) DC SW DC SW POWER SUPPLY CN402 7.49V Q414 Q415 EMD12 EMD12 BATT INT 7.49V 6.05V DC SW IC414 CN404 XC61CC5602NR D408 Q408 R511 1k LED_G EMD12 LED_G DC/DC RESET CONVERTER R512 100 /EMG CONTROL /EMG R513 1k...
  • Page 96 NX-300 SCHEMATIC DIAGRAM TX-RX UNIT : (X57-7370-11) (A/2) R590 10k R589 10k CN900 SWITCH UNIT LED_G (X41-3710-10) LED_G CN901 C904 47p R928 /EMG /PTT C905 47p Side_G LED_R Side_G LED_R SIDE 1 Side_1 C906 47p Side_1 TX/RX LED TX/RX LED Side_2 Side_2 SWITCH...
  • Page 97 NX-300 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7370-11) (A/2) /T R C543 L504 C525 C553 R577 R550 C588 R583 IC500 TEMPERATURE SENSOR IC500 LM73CIMKX-0 R572 C514 I2CCK SMBCLK IC502 C515 0.01u ALERT SKY72300-362 R955 I2CSDA SMBDAT ADDR 0.01u PLL IC R586 R503 CPout1 R522 R956...
  • Page 98 NX-300 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7370-11) (A/2) TH600 100k -t ° CN600 CN601 DRIVE AMP C621 L605 Q602 R628 R620 C670 2SK3077F 470p R : 5mV PRE-DRIVE AMP T : 0.99V R : 4.75V R : 2.5mV Q601 BUFFER AMP T : 4.8V LOCAL SWITCH T : 2.37V...
  • Page 99 NX-300 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7370-11) (A/2) R : 0.5mV RF FINAL AMP ANTENNA SWITCH T : 1.615V Q606 L903 D606 L612 L613 L614 Strip line R : 12mV RD07MVS1BT122 6.8n HVC131 C660 C663 T : 2.10V PRE-FINAL AMP C634 100p 100p Q603...
  • Page 100 NX-300 NX-300 BLOCK DIAGRAM Control unit (X53-4262-XX) X102 18.432MHz SM5023CNDH-G IC107 TCXO IC101 IC103 Flash SRAM IC102 /DRST,DCLK,/SYMTIM,/RSSITIM, /DINT,/SWUP,FSDET,/HINT IC401 TC74LCX245FK MCD1AF,/MCSCKAF,/MCCSAF,MCD0AF,MCD1CN, BUS SW IC402 TC7WZ245FK-F /MCCXCN,/MCD0CN,/MCCSRCN,MCSCKCN D0~15,A0~20,/RD,/WR,/CS0,/CS2,/CS3,/CS4/HDS2,/HRDY /LCDRST TXD0 RXD0 IC703 RTS0 M62364FP-F(7/8) CTS0 LCDCNT /PTT IC105 /UDET XC6109C29ANN NJM2130F3-ZB RXD3 ENC1...
  • Page 101 NX-300 NX-300 BLOCK DIAGRAM L401 , D406 , D405 IC404 XC6204B332D IC407 LT1616ES6-PBF DCDC Converter IC717 D408 Q402 SSM6N16FE-F XC9235A15CM1 1SS301F DCDC DCSW /PSW Q408 IC414 Q401 SSM6N16FE-F EMD12 XC61CC5602NR IC406 RESET /BINT XC6204B332M IC416 S-812C31BPI-G DCSW SCTAM1 Q413 2SA1955A-F Q412 SSM3K15TE(F) DCSW 31BU...
  • Page 102 NX-300 BLOCK DIAGRAM TX-RX unit (X57-7370-11) CN900 Q507 I2CCK 2SC5383-T111 I2CSDA Ripple Filter IC500 Q510 SSM6L05FU-F /T_R LM73CIMKX-0 Q511 2SJ347F Temp. IC502 Q512 Q600 Sensor SKY72300-362 2SC5636 2SC5636 TCXO_MOD Loop BUFF BUFF TCXO Filter X500 19.2MHz IC501 TLV2381IDBV Q504 Q508,509 2SK508NV(K52) 2SK879-F(Y) D506,507 1SV325F D519 1SV278F...
  • Page 103 NX-300 BLOCK DIAGRAM TX/RX: 400~470MHz D606,607 D600,601 Q601 Q602 Q603 Q606 D709,711 HSC277x2 2SC5636 2SK3077F RD01MUS1-T113 RD07MVS1BT122 HVC131x4 Pre- Pre- Drive Final Drive Final Q610 EMD5 Q604 DC SW DC SW /APCSW 2SC5383-T111 /DSW IC600 TA75W01FUF 150C Q607 Q608 DTC144EE 2SK1824-A Q704 2SC5383-T111...
  • Page 104 NX-300 LEVEL DIAGRAM...
  • Page 105 NX-300 OPTIONAL ACCESSORIES KNB-47L (Li-ion Battery Pack) KNB-48L (Li-ion Battery Pack) ■ External View ■ External View ■ Specifi cations ■ Specifi cations Voltage ................7.4V Voltage ................7.4V Battery capacity ............1950mAh Battery capacity ............2550mAh ■ Schematic Diagram ■ Schematic Diagram DISCHARGING TERMINALS DISCHARGING TERMINALS 560kΩ...
  • Page 106 8K30F1D, 8K30F7W, 4K00F1E, 4K00F1D, 4K00F7W, 4K00F2D Analogue measurements made per EN standards or TIA/EIA 603 and specifi cations shown are typical KENWOOD reserves the right to change specifi cations without prior notice or obligation. 2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525 Japan P.O.
  • Page 107 NX-300 NX-300 PC BOARD PC BOARD CONTROL UNIT (X53-4262-XX) -71: E4 -72: E CONTROL UNIT (X53-4262-XX) -71: E4 -72: E Component side view (J79-0131-29) Component side view (J79-0131-29) CN22 CN23 /RES R406 C452 R500 CN24 J79-0131-29 Component side Ref. No. Address Ref.
  • Page 108 NX-300 NX-300 PC BOARD PC BOARD CONTROL UNIT (X53-4262-XX) -71: E4 -72: E CONTROL UNIT (X53-4262-XX) -71: E4 -72: E Foil side view (J79-0131-29) Foil side view (J79-0131-29) R402 R735 D409 L719 R472 Q102 Q101 C712 R496 R112 R750 R117 R114 R745 R442...
  • Page 109 NX-300 NX-300 PC BOARD PC BOARD TX-RX UNIT (X57-7370-11) (A/2) TX-RX UNIT (X57-7370-11) (A/2) Component side view (J79-0128-39 A/2) Component side view (J79-0128-39 A/2) C630 C646 C640 R648 R652 R651 R653 C641 R641 C945 Side_G Q504 Side_1 R654 C943 C971 Side_2 Q607 C636...
  • Page 110 NX-300 NX-300 PC BOARD PC BOARD TX-RX UNIT (X57-7370-11) (A/2) TX-RX UNIT (X57-7370-11) (A/2) Foil side view (J79-0128-39 A/2) Foil side view (J79-0128-39 A/2) C645 C643 L610 R575 C648 L514 C642 C556 C988 C557 R646 C632 L516 L515 C635 C547 L517 C545 L614...
  • Page 111 TX-RX UNIT : (X57-7370-11) (A/2) C459 SWITCH UNIT (X41-3720-10) R : 0.5mV GPIo7 GPIo7 GPIo7 GPIo7 L101 470p D405,406,IC407 POWER SUPPLY DC SW DC SW R590 10k TH600 100k RF FINAL AMP Q606 Strip line L903 T : 1.615V ANTENNA SWITCH D606 L612 L613...
  • Page 112 IC404 L401 , D406 , D405 XC6204B332D IC407 LT1616ES6-PBF X102 DCDC 18.432MHz Converter SM5023CNDH-G IC107 TCXO IC717 D408 Q402 SSM6N16FE-F XC9235A15CM1 1SS301F IC101 IC103 DCDC DCSW /PSW Flash Q408 IC414 SRAM IC102 Q401 SSM6N16FE-F EMD12 XC61CC5602NR IC406 /BINT RESET XC6204B332M IC416 S-812C31BPI-G /DRST,DCLK,/SYMTIM,/RSSITIM,...
  • Page 113 CN900 Q507 I2CCK 2SC5383-T111 I2CSDA Ripple TX/RX: 400~470MHz Filter IC500 Q510 SSM6L05FU-F /T_R LM73CIMKX-0 D606,607 Q511 2SJ347F Temp. IC502 Q512 Q600 D600,601 Q601 Q602 Q603 Q606 D709,711 Sensor SKY72300-362 2SC5636 2SC5636 HSC277x2 2SC5636 2SK3077F RD01MUS1-T113 RD07MVS1BT122 HVC131x4 Pre- Pre- TCXO_MOD Loop BUFF BUFF...
  • Page 114 POWER SW/ CHANNEL SWITCH UNIT AF VOL SELECTOR X41-372 6KEY/SP/MIC CORD ASSY CN403 CN23 CN404 CN900 X42-334 LED_G LED_G /EMG /EMG LED_R LED_R /SAVE /SAVE I2CCK I2CCK /5TC /5TC I2CSDA I2CSDA /T_R /T_R ASSIST ASSIST SWITCH UNIT VAGC VAGC X41-371 /RES TCXO_MOD TCXO_MOD...

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