Kenwood NX-300S Service Manual

Uhf digital transceiver. k2 version

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Page 1: Table Of Contents
UHF DIGITAL TRANSCEIVER NX-300(S) SERVICE MANUAL K2 version © 2011-10 PRINTED IN JA PAN B51-8992-00 ( Y ) 330 Helical Antenna (KRA-23: option) Knob (Volume) CONTENTS (K29-9407-03) Knob (Selector) GENERAL ..............2 (K29-9408-13) SYSTEM SET-UP ............3 REALIGNMENT ............4 INSTALLATION ............
Page 2: General
Copyright 2011 by JVC KENWOOD Corporation. All The title to and ownership of copyrights for firmware rights reserved. embedded in Kenwood product memories are reserved for No part of this manual may be reproduced, translated, JVC KENWOOD Corporation. Any modifying, reverse en-...
Page 3: System Set-Up
NX-300(S) SYSTEM SET-UP Merchandise received License and frequency allocated by FCC Frequency range (MHz) RF power Type Choose the type of transceiver TX/RX 400~470 NX-300(S) K2 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: Realignment
NX-300(S) REALIGNMENT 1. Modes 3. PC Mode 3-1. Preface The transceiver is programmed by using a personal com- User mode puter, programming interface (KPG-36/36A), USB adapter (KCT-53U) and programming software (KPG-111D ver. 2.70 PC mode Data programming mode or later). The programming software can be used with a PC.
Page 5 NX-300(S) REALIGNMENT 3-3. KPG-36/KPG-36A description Note: (PC programming interface cable: Option) This mode cannot be entered if the Firmware Program- ming mode is set to Disable in the Programming soft- The KPG-36/36A is required to interface the transceiver ware. to the computer. It has a circuit in its D-sub connector (KPG- 36: 25-pin, KPG-36A: 9-pin) case that converts the RS-232C 4-4.
Page 6: Installation
NX-300(S) INSTALLATION 5. Attach the cushion (G13-1974-04) to the VGS-1 as Voice Guide & Storage Unit (VGS-1: Option) shown in the ﬁ gure. ■ Installing the VGS-1 (Voice Guide & Storage Note: Unit) in the transceiver Be sure not to cover the VGS-1 connector with the cush- 1.
Page 7: Disassembly For Repair
NX-300(S) DISASSEMBLY FOR REPAIR ■ Removing the TX-RX unit from the chassis 1. Precautions for Waterproof 1. Remove the cord ASSY from the connector of the TX-RX • Do not remove the black sheet from the reverse side of unit (CN900) a . the transceiver (refer to the illustration below).
Page 8 NX-300(S) DISASSEMBLY FOR REPAIR ■ Removing the TOP packing (G53-1762-02) 3. Precautions for Reassembly 1. Pull the TOP packing to the left to remove the packing ■ Installing the option board cover onto the chassis that is ﬁ t into the left groove of the chassis a . Install the option board cover onto the chassis using the 2.
Page 9 NX-300(S) DISASSEMBLY FOR REPAIR Note: Fold indications are printed on the Cord ASSY and Uni- versal Connector FPC. “––––” line shows creased line on the top. “- - - -” line shows creased line on the bottom. TX-RX CONT J87-0005 S Auxiliary (Orange) key Cord ASSY...
Page 10 Assembled Sheet/ Cushion Part Name Part Number Part Name Part Number Remark Sticker B42-7463-04 “NXDN” is printed. Badge B43-1645-04 “KENWOOD” is printed. Plastic Cabinet A02-4116-03 Fibrous Sheet (SP) G10-1806-04 Fibrous Sheet (MIC) G10-1822-04 Dressing Panel A21-1664-03 Cord ASSY (50-pin X42-3380-10...
Page 11: Circuit Description
NX-300(S) CIRCUIT DESCRIPTION 1. Overview 2. Frequency Conﬁ guration The NX-300(S) is a UHF portable transceiver designed The receiver is a double-conversion superheterodyne us- to operate in the frequency range of 400 to 470MHz. The ing the ﬁ rst intermediate frequency (IF) of 58.05MHz and the unit consists of receiver, transmitter, phase-locked loop (PLL) second IF of 450kHz.
Page 12 NX-300(S) 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 ﬁ ltering through the BPF circuit. Then, the ampliﬁ ed sig- mode are processed by DSP.
Page 13 NX-300(S) 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 14 NX-300(S) 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” se- The PLL IC compares the differences in phases of the rial bus. Whether the PLL IC is locked or not is monitored by VCO oscillation frequency and the VCTCXO reference fre- the ASIC through the “PLD”...
Page 15 NX-300(S) CIRCUIT DESCRIPTION 6-2. Memory Circuit 6-5. DSP The memory circuit consists of the ASIC (IC108) and the The DSP circuit consists of a DSP (IC102) and process- SRAM (IC103) and ﬂ ash memory (IC101). The ﬂ ash memory es the baseband signal. The DSP operates on an external has capacity of 32M-bit that contains the transceiver control clock of 18.432MHz (the same as the IC108), the I/O section program for the ASIC and stores the data.
Page 16 NX-300(S) 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, IC902 /SAVE 2-tone and MSK is generated by the DSP circuit, super- Q905 posed on a modulation signal and output from IC108. The /5TC TX circuit 50T SW...
Page 17: Components Description
NX-300(S) COMPONENTS DESCRIPTION Control unit (X53-4432-75) Ref. No. Part Name Description Ref. No. Part Name Description Q410 DC switch IC101 Flash memory Q411 Level converter IC102 Q412 DC switch control Q413~415 Transistor DC switch IC103 SRAM Q702 Tone switch IC104 2 input AND gate Q703 W/N noise switch...
Page 18 NX-300(S) COMPONENTS DESCRIPTION TX-RX unit (X57-7830-11) 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 Q900 Transistor TX/RX LED switch IC501 AF AMP for TCXO MOD Q901 SB3 switch...
Page 19: Parts List
NX-300(S) PARTS LIST 2 2 0 CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc. 5 = Value 101 = 100pF Multiplier 3 = Temp.
Page 20 K29-9407-03 KNOB(VOL) 1B,1D B09-0712-03 ACCESSORY K29-9408-13 KNOB(SELECTOR) B11-1855-04 ILLUMINATION GUIDE(TX/BUSY) B42-7463-04 STICKER(NEXEDGE) 1B,1D N08-0564-04 DRESSED SCREW ACCESSORY B43-1645-04 BADGE(KENWOOD) N09-2426-14 HEXAGON HEAD SCREW(BATT-) ✽ B62-2368-00 INSTRUCTION MANUAL N09-2440-15 SPECIAL SCREW(CASE/CHASSIS) 2A,2B N09-6549-04 STEPPED SCREW(FG-SP HOLDER) CC73GCH1H101J CHIP C 100PF 2B,3A...
Page 21 NX-300(S) PARTS LIST CONTROL UNIT (X53-4432-75) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C136 CK73HB1E103K CHIP C 0.010UF C709 CK73HB0J105K CHIP C 1.0UF C137 CK73GB1E105K CHIP C 1.0UF C710 CK73HB1E103K...
Page 22 NX-300(S) PARTS LIST CONTROL UNIT (X53-4432-75) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C795 CK73HB1E103K CHIP C 0.010UF R116 RK73HB1J473J CHIP R 1/16W C796 CK73HB1A104K CHIP C 0.10UF R118 RK73HB1J473J...
Page 23 NX-300(S) PARTS LIST CONTROL UNIT (X53-4432-75) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R442 RK73HB1J102J CHIP R 1.0K 1/16W R716 RK73GB2A000J CHIP R 1/10W R443 RK73HB1J474J CHIP R 470K 1/16W R717-722...
Page 24 NX-300(S) PARTS LIST CONTROL UNIT (X53-4432-75) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R799 RK73HB1J334J CHIP R 330K 1/16W D411 1SS416 DIODE R800 RK73HB1J474J CHIP R 470K 1/16W D412 1SS301F...
Page 25 NX-300(S) PARTS LIST CONTROL UNIT (X53-4432-75) TX-RX UNIT (X57-7830-11) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation Q414,415 EMD12 TRANSISTOR C563 CC73HCH1H101J CHIP C 100PF Q702,703 SSM3K15TE(F) C565 CC73HCH1H330J CHIP C 33PF...
Page 26 NX-300(S) PARTS LIST TX-RX UNIT (X57-7830-11) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C664 CC73GCH1H2R5B CHIP C 2.5PF C761 CK73GB1E105K CHIP C 1.0UF C665 CC73GCH1H030B CHIP C 3.0PF C764 CC73HCH1H1R5B CHIP C...
Page 27 NX-300(S) PARTS LIST TX-RX UNIT (X57-7830-11) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C963 CK73GB1E105K CHIP C 1.0UF L711 L40-3375-92 SMALL FIXED INDUCTOR(33NH) C964,965 CK73GB1C224K CHIP C 0.22UF L713-715 L41-1078-14...
Page 28 NX-300(S) PARTS LIST TX-RX UNIT (X57-7830-11) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R573 RK73HB1J124J CHIP R 120K 1/16W R671 RK73GB2A000J CHIP R 1/10W R574-576 RK73HB1J000J CHIP R 1/16W R701 RK73HB1J561J...
Page 29 NX-300(S) PARTS LIST TX-RX UNIT (X57-7830-11) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R783 RK73HB1J224J CHIP R 220K 1/16W D605 HZU5CLL ZENER DIODE R784 RK73HB1J474J CHIP R 470K 1/16W D606,607...
Page 30: Exploded View
NX-300(S) EXPLODED VIEW Control unit (X53) Optional board unit (X57 B/2) Hx10 TX-RX unit (X57 A/2) A : N08-0564-04 B : N09-2426-14 C : N09-2440-15 D : N09-6549-04 E : N09-6554-05 G : N14-0844-04 H : N83-2005-48 Parts with the exploded numbers larger than 700 are not supplied.
Page 31: Packing
NX-300(S) PACKING 60 Belt clip (B09-0712-03) (J29-0730-05) 50 Packing (Cap) (G53-1769-04) F Pan head machine screw (N09-6585-05)x2 A Dressed screw (N08-0564-04) 53 Packing fixture (H12-4293-02) 54 Carton board (H13-2135-04) 715 Pamphlet 14 Instruction manual (B62-2368-00) 716 Pamphlet 53 Packing fixture (H12-4293-02) 55 Item carton case (H52-2327-02)
Page 32: Trouble Shooting
NX-300(S) 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 due to broken BGA parts. ■ BGA parts ASIC (IC108), DSP (IC102), FLASH (IC101), SRAM (IC103) When the BGA IC is problematic, please bring the printed circuit board (X53-4432-77) in for service.
Page 33 NX-300(S) TROUBLE SHOOTING ● Checking the output signal When a normal 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 34 General adjustment values for the (PC Test mode) X53-443 (NX-200S). Model Name: [X53-443] NX-200SS Kenwood ESN Type: E The same number as the Kenwood ESN label is written. NXDN ESN/ The same number as the NXDN ESN/ X53-443 R848 R849...
Page 35 NXDN ESN Label (12 digits) MPT ESN Label (11 digits: xxx/ xx/ xxxxxx) Note: A UPC code and UPC barcode is not printed on the Kenwood ESN Label. If necessary, cut the label at the cut-off line and attach only the serial number.
Page 36: Adjustment
NX-300(S) ADJUSTMENT • NXDN mode signaling PC Test Mode Used to check the transceiver using the PC. This feature is included in the FPU. RAN1 RAN1 None ■ Frequency and Signaling RAN1 Maximum deviation pattern The transceiver has been adjusted for the frequencies None FSW+PN9 shown in the following table.
Page 37 NX-300(S) ADJUSTMENT Adjustment item supplement Adjustment Item Description “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” and “Clockwise Volume” must be adjusted. Clockwise Volume (The curve data of volume is applied.) The lock voltage of VCO (Receive) is adjusted.
Page 38 NX-300(S) ADJUSTMENT Adjustment item Analog Analog NXDN NXDN Adjust item Wide Narrow Narrow Very Narrow Order Adjustment item Number Adjustment range 1 point ADJ Common Counterclockwise Volume Section 2 1~256 1 point ADJ Common Clockwise Volume Section 3 1~256 5 point ADJ Common Receive Assist Section 4...
Page 39 NX-300(S) ADJUSTMENT Analog Analog NXDN NXDN Adjust item Wide Narrow Narrow Very Narrow Order Adjustment item Number Adjustment range - *1 Receiver Open Squelch Section 5 1~256 - *1 Receiver Low RSSI Section 6 1~256 - *1 Receiver High RSSI Section 7 1~256 Receiver...
Page 40 Li-ion High Capacity Battery: R1=Open In order to turn the volume nut and the channel selector Li-ion Normal Capacity Battery: R1=560k 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 41 NX-300(S) 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 42 NX-300(S) ADJUSTMENT Radio Check Section Measurement Adjustment Speciﬁ cations / Item Condition Test- Remarks Unit Terminal Unit Parts Method equipment 1. Frequency 1) Test Channel f. counter Check an internal 435.100021~ check Channel: 1 temperature of 435.100239MHz Test Signaling radio within 25˚C ± (+0.05/+0.55ppm Mode: Analog 2˚C.
Page 43 NX-300(S) ADJUSTMENT Measurement Adjustment Speciﬁ cations / Item Condition Test- Remarks Unit Terminal Unit Parts Method equipment 5. Sensitivity 1) Test Channel Check 12dB SINAD or check Channel: 1 AF VM Universal more Test Signaling Oscilloscope connector Mode: Analog Distortion Signaling: 1 meter SSG output...
Page 44 NX-300(S) ADJUSTMENT Measurement Adjustment Speciﬁ cations / Item Condition Test- Remarks Unit Terminal Unit Parts Method equipment 5. Frequency 1) Adj item: [Frequency] Press [Start] button “IF20” value = adjust SSG output : –20dBm (22.4mV) of “Auto Tuning”. Within 0±12 digits. (CW (without modulation)) Press [Apply] button The value of “IF20”...
Page 45 NX-300(S) ADJUSTMENT Measurement Adjustment Speciﬁ cations / Item Condition Test- Remarks Unit Terminal Unit Parts Method equipment 4. Maximum 1) Adj item: [Maximum Deviation (NXDN Deviation [ ],[ ] 3056Hz 2995~3117Hz Deviation Narrow)] meter (NXDN) Deviation meter Oscilloscope Press [Apply All] adjust *3 LPF: 3kHz button to store the...
Page 46 NX-300(S) ADJUSTMENT Measurement Adjustment Speciﬁ cations / Item Condition Test- Remarks Unit Terminal Unit Parts Method equipment Maximum 1) Adj item: [Maximum Deviation (Analog Deviation [ ],[ ] Write the same 4150~4250Hz Deviation Wide)] meter adjustment value of (Analog) 2) Adj item: [Low], [Low’], [Center], [High’], Oscilloscope “NXDN Deviation Press [Apply All]...
Page 47 NX-300(S) ADJUSTMENT Measurement Adjustment Speciﬁ cations / Item Condition Test- Remarks Unit Terminal Unit Parts Method equipment 8. LTR 1) Adj item: [LTR Deviation (Analog Narrow)] Deviation [ ],[ ] Write the value as 0.75kHz±0.05kHz Deviation Deviation meter meter followings. adjust *4 LPF: 3kHz Oscilloscope...
Page 48 NX-300(S) ADJUSTMENT Measurement Adjustment Speciﬁ cations / Item Condition Test- Remarks Unit Terminal Unit Parts Method equipment 11. MSK 1) Adj item: [MSK Deviation (Analog Narrow)] Deviation [ ],[ ] Write the value as 1.50kHz±0.05kHz Deviation Deviation meter meter followings. adjust *4 LPF: 15kHz Oscilloscope...
Page 49 NX-300(S) 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)”, this signaling is composed of three elements [Balance, Maximum Deviation (Analog Wide) and QT Deviation (Wide)]. Please adjust Balance and Maximum Deviation (Analog Wide) before adjusting QT Deviation (Wide).
Page 50 NX-300(S) ADJUSTMENT Receiver Section Measurement Adjustment Speciﬁ cations / Item Condition Test- Remarks Unit Terminal Unit Parts Method equipment 1. AF level 1) Test Channel Volume Turn the Volume 0.63V±0.1V setting Channel: 1 Universal knob knob to obtain Test Signaling AF VM connector 0.63V AF output.
Page 51 NX-300(S) ADJUSTMENT Measurement Adjustment Speciﬁ cations / Item Condition Test- Remarks Unit Terminal Unit Parts Method equipment 4. RSSI 1) Adj item: [RSSI Reference (Analog Narrow)] After input signal Reference 2) Adj item: [Low], [Low’], [Center], [High’], Distortion Universal from SSG, press adjust *5 [High] meter...
Page 52 NX-300(S) ADJUSTMENT Measurement Adjustment Speciﬁ cations / Item Condition Test- Remarks Unit Terminal Unit Parts Method equipment Open 1) Adj item: [Open Squelch (NXDN Very Nar- After input signal Adjust with the Squelch row)] Distortion Universal from SSG, press analog signal. adjust *6 2) Adj item: [Low], [Low’], [Center], [High’], meter...
Page 53 NX-300(S) ADJUSTMENT Measurement Adjustment Speciﬁ cations / Item Condition Test- Remarks Unit Terminal Unit Parts Method equipment 7. High RSSI 1) Adj item: [High RSSI (Analog Narrow)] After input signal adjust *8 2) Adj item: [Low], [Low’], [Center], [High’], Universal from SSG, press [High] connector...
Page 54: Terminal Function
NX-300(S) TERMINAL FUNCTION Control unit (X53-4432-75) Pin No. Name Function Pin No. Name Function RSSI RSSI voltage input CN23 PGND Internal MIC GND CV voltage input Internal MIC input AGND BTL output + for internal speaker No connection BTL output + for internal speaker No connection BTL output –...
Page 55 NX-300(S) TERMINAL FUNCTION TX-RX unit (X57-7830-11 A/2) Pin No. Name Function Serial data output Pin No. Name Function CN900 Serial data input LED_G Green LED control input No connection CN710 /EMG Emergency (Orange) key output LED_R Red LED control input OPT1 OPT3 TX-RX PCB version recognition output...
Page 56 NX-300(S) TERMINAL FUNCTION Pin No. Name Function /APCSW APC switch control input VCO_MOD VCO modulation input Thermistor voltage output PLL lock detect output 38M input SCK1 PLL clock input S_DET Battery select output No connection IF_DET IF output CN901 Internal PTT input Side_G Key matrix output (SIDE1,2 key) Side_1...
Page 57 NX-300(S) 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 [8 load] Max output power (1kHz, Batt=7.5V) Analog BTL output + for external speaker [8...
Page 58 NX-300(S) 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 59 NX-300(S) 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 Allowable Frequency 3000 Input Amplitude (1kHz, 60% deviation) mVp-p Coupling Capacitor µF RXEI Analog ...
Page 60 NX-300(S) TERMINAL FUNCTION Pin No. Name Device Connection Function ANI board 26P_RD VGS-1 Serial data input Scrambler board Serial data input ANI board 26P_TD VGS-1 Serial data output Scrambler board Serial data output ANI board PTT signal output VGS-1 Enable OPT4 PTT signal output Scrambler board...
Page 61 NX-300(S) TERMINAL FUNCTION Pin No. Name Device Connection Function ANI board Man-Down Man-Down output VGS-1 User programmable port OPT11 None: Hi-Z with Pull up Scrambler board [COR] L: Detect carrier [TOR] L: Detect signaling [LOK](Conventional) L: Transmitting [LOK](LTR) L: Link ANI board MIC Mute MIC mute signal input...
Page 62: Pc Board
NX-300(S) PC BOARD CONTROL UNIT (X53-4432-75) Component side view (J79-0131-39) J79-0131-39 Ref. No. Address Ref. No. Address IC415...
Page 63 NX-300(S) PC BOARD CONTROL UNIT (X53-4432-75) Component side view (J79-0131-39) CN22 CN23 C452 R500 CN24 Component side Layer 1 Layer 2 Layer 3 Layer 4 Layer 5 Layer 6 Foil side...
Page 64 NX-300(S) PC BOARD CONTROL UNIT (X53-4432-75) Foil side view (J79-0131-39) D409 L719 R472 R496 C429 R442 Q405 L410 R474 C440 IC413 C415 + L401 R462 R133 R489 C437 C416 R132 R471 C438 R490 R495 C806 C424 R140 R484 R446 R139 R441 D410 R497...
Page 65 NX-300(S) PC BOARD CONTROL UNIT (X53-4432-75) Foil side view (J79-0131-39) R735 C712 R750 R745 IC707 R793 C717 C722 R829 C767 R758 R755 C745 R753 L710 C118 R847 C731 R746 C714 R800 Q702 D703 R738 R802 R416 R845 R749 C746 C761 R144 R779 C782...
Page 66: Tx-Rx Unit (X57-7830-11)
NX-300(S) PC BOARD TX-RX UNIT (X57-7830-11) (A/2) Component side view (J79-0128-49 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 67 NX-300(S) PC BOARD TX-RX UNIT (X57-7830-11) (A/2) Component side view (J79-0128-49 A/2) C640 R648 R651 C641 C945 Side_G R654 Side_1 C971 C943 Side_2 C636 R655 TX-RX UNIT C913 C976 R921 (X57-7830-11) (B/2) Q608 R922 Q905 R659 C964 RXEO OPT9 D901 R908 D902 F900...
Page 68 NX-300(S) PC BOARD TX-RX UNIT (X57-7830-11) (A/2) Foil side view (J79-0128-49 A/2) C988 L614 TX-RX UNIT (X57-7830-11) (B/2) C609 C668 C665 CN601 J79-0128-49 B/2 L612 C663 CN600 C662 C664 D709 C954 26 POW OPT6 C803 RXEI R915 C952 L725 RXEO R931 OPT2 OPT7...
Page 69 NX-300(S) PC BOARD TX-RX UNIT (X57-7830-11) (A/2) Foil side view (J79-0128-49 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 70: Interconnection Diagram
NX-300(S) INTERCONNECTION DIAGRAM POWER SW/ CHANNEL AF VOL SELECTOR CN403 CN23 CONTROL PCB X53-443 CN710 CN405 CN737 UNIVERSAL CONNECTOR OPTION PCB X57-783 B/2...
Page 71 NX-300(S) INTERCONNECTION DIAGRAM CORD ASSY CN404 CN900 X42-338 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 X41-376 TCXO_MOD TCXO_MOD PGND CN901 RSSI RSSI PGND AGND Side_G Side_1 Side_1 Side_2...
Page 72: Schematic Diagram
NX-300(S) SCHEMATIC DIAGRAM CONTROL UNIT (X53-4432-75) 31BU R413 470 KEYO3 CONTROL R416 /KEYI2 R144 /KEYI3 L710 C118 VCC1 VSS1 DQ11 IC103 DQ13 IC101 C105 DQ15 SRAM FLASH MEMORY VSS1 C106 0.01u VSS2 RESET X53-443 1/10...
Page 73 NX-300(S) SCHEMATIC DIAGRAM CONTROL UNIT (X53-4432-75) X2_CLKIN L712 R126 100 MCDIAF R127 0 DVSS7 R128 0 BCLKX1 MCSCKAF R135 100k CVSS8 FSDET CVDD5 C119 1u R141 100k INT3 CVSS9 INT2 DVDD5 C101 INT1 /DINT R150 1k 0.1u INT0 /SYMTIM R142 100k 33MDSP /DWUP R136 100k...
Page 74 NX-300(S) SCHEMATIC DIAGRAM CONTROL UNIT (X53-4432-75) 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 75 NX-300(S) SCHEMATIC DIAGRAM CONTROL UNIT (X53-4432-75) GPIo7 GPIo7 33A-1 IC108 ASIC R470 IFADCN /DRST /DRST 33MAS 33MAS 33A-1 33A-1 SPCS10 SPCS10 RESET X53-443 4/10...
Page 76 NX-300(S) SCHEMATIC DIAGRAM CONTROL UNIT (X53-4432-75) 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 R510 DVDIo5 CHANNEL SELECTOR ENC3 DVDIo4 R509 AGND...
Page 77 NX-300(S) SCHEMATIC DIAGRAM CONTROL UNIT (X53-4432-75) D702 R819 MA2S111-F R790 CONTROL ASQDET R798 100k C755 47p OPT10 R803 ASQ DET NOISE ASQAPC IC711 DETECTOR TC75W51FK(F) D705 SQL BPF/ R824 KDR731 R739 C716 SQL DC AMP R809 C771 680p 330k 0.22u C723 C764 0.1u...
Page 78 NX-300(S) SCHEMATIC DIAGRAM CONTROL UNIT (X53-4432-75) 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 SSM6N16FE-F C440 0.1u SP CONTROL BYPASS C437 R489 D409 0.056u MA2S111-F SP CONTROL...
Page 79 NX-300(S) SCHEMATIC DIAGRAM CONTROL UNIT (X53-4432-75) CN23 AGND 6_/KEYI0 BL_SB 6_KEYO1 6_KEYO0 BL_SB 6_KEYO2 6_/KEYI1 D18,19 SURGE ABSORPTION R846 MUTE Q707 3.32V 2SJ243-A 2SJ347F C797 CN22 CN24 MUTE D20-23 R843 SURGE ABSORPTION MUTE CONTROL SSM3K15TE(F) D12-16 REVERSE CN405 CURRENT PREVENTION EXTSP+ EXTSP- 1SS416...
Page 80 NX-300(S) SCHEMATIC DIAGRAM CONTROL UNIT (X53-4432-75) D405,406,IC407 Q401, 402 VOLTAGE REGULATOR (33M) DC/DC CONVERTER LEVEL CONVERTER L402 L401 IC404 XC6204B332D-G 3.284V VOUT R438 3.82V 100k L702 IC407 R456 LT1616ES6-PBF 470k R439 D416 100k Q402 R548 47K SSM6N16FE-F D416 33A CONTROL R435 100k DC/DC CONVERTER (15M)
Page 81 NX-300(S) SCHEMATIC DIAGRAM CONTROL UNIT (X53-4432-75) DC SW DC SW POWER SUPPLY CN402 7.49V Q414 Q415 EMD12 EMD12 BATT INT 7.49V 6.05V DC SW IC414 CN404 XC61CC5602N-G D408 Q408 R511 1k LED_G EMD12 LED_G DC/DC RESET CONVERTER R512 100 /EMG CONTROL /EMG R513 1k...
Page 82 NX-300(S) SCHEMATIC DIAGRAM TX-RX UNIT : (X57-7830-11) (A/2) R590 10k R589 10k CN900 SWITCH UNIT LED_G (X41-3760-10) 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 83 NX-300(S) SCHEMATIC DIAGRAM TX-RX UNIT (X57-7830-11) (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 SKY72310-362 R955 I2CSDA SMBDAT ADDR 0.01u PLL IC R586 R503 CPout1 R522 R956...
Page 84 NX-300(S) SCHEMATIC DIAGRAM TX-RX UNIT (X57-7830-11) (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 85 NX-300(S) SCHEMATIC DIAGRAM TX-RX UNIT (X57-7830-11) (A/2) D606, 607 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...
Page 86: Block Diagram
NX-300(S) NX-300(S) BLOCK DIAGRAM Control unit (X53-4432-75) X102 18.432MHz SM5023CNDH-G IC107 TCXO IC101 IC103 Flash SRAM IC102 Memory /DRST,DCLK,/SYMTIM,/RSSITIM, /DINT,/SWUP,FSDET,/HINT MCD1AF,/MCSCKAF,/MCCSAF,MCD0AF,MCD1CN, /MCCXCN,/MCD0CN,/MCCSRCN,MCSCKCN D0~15,A0~20,/RD,/WR,/CS0,/CS2,/CS3,/HDS2,/HRDY TXD0 RXD0 RTS0 CTS0 /PTT IC105 /UDET XC6109C29AN-G RXD3 ENC1 RESET ENC2 ENC3 IF_DET ENC4 /BINT /PSW IC711 Q704 TC75W51FK(F)(2/2)
Page 87 NX-300(S) NX-300(S) BLOCK DIAGRAM IC404 L401 , D406 , D405 IC407 LT1616ES6-PBF XC6204B332D-G DCDC Converter IC717 D408 Q402 SSM6N16FE-F XC9235A15CM-G 1SS301F DCDC DCSW /PSW Q408 IC414 Q401 SSM6N16FE-F EMD12 XC61CC5602N-G IC406 RESET /BINT XC6204B332M-G IC416 S-812C31BPI-G DCSW SCTAM1 Q413 2SA1955A-F Q412 SSM3K15TE(F) DCSW 31BU...
Page 88 NX-300(S) BLOCK DIAGRAM TX-RX unit (X57-7830-11) CN900 Q507 I2CCK 2SC5383-T111 Ripple I2CSDA Filter IC500 Q510 SSM6L05FU-F /T_R LM73CIMKX-0 Q511 2SJ347F Temp. IC502 Q512 Q600 Sensor SKY72310-362 2SC5636 2SC5636 TCXO_MOD Loop BUFF BUFF TCXO Filter IC501 X500 19.2MHz TLV2381IDBV Q504 Q508,509 2SK508NV(K52) 2SK879-F(Y) D506,507 1SV325F D519 1SV278F...
Page 89 NX-300(S) 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 Q704 RT1N441U-T111 2SK1824-A 2SC5383-T111...
Page 90: Level Diagram
NX-300(S) LEVEL DIAGRAM...
Page 91: Optional Accessories
NX-300(S) 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 ■...
Page 92: Specifications
Audio Distortion ..........Less than 3% Modulation ............16K0F3E, 11K0F3E, 8K30F1E, 8K30F1D, 8K30F7W, 4K00F1E, 4K00F1D, 4K00F7W, 4K00F2D Analog measurements made per TIA/EIA 603 and speciﬁ cations shown are typical. JVC KENWOOD Corporation reserves the right to change speciﬁ cations without prior notice or obligation.
Page 93 NX-300(S) NX-300(S) PC BOARD PC BOARD CONTROL UNIT (X53-4432-75) CONTROL UNIT (X53-4432-75) Component side view (J79-0131-39) Component side view (J79-0131-39) CN22 CN23 C452 R500 CN24 J79-0131-39 Component side Layer 1 Ref. No. Address Ref. No. Address Layer 2 IC415 Layer 3 Layer 4 Layer 5 Layer 6...
Page 94 NX-300(S) NX-300(S) PC BOARD PC BOARD CONTROL UNIT (X53-4432-75) CONTROL UNIT (X53-4432-75) Foil side view (J79-0131-39) Foil side view (J79-0131-39) R735 D409 L719 R472 C712 R750 R496 R745 C429 Q405 R442 IC707 L410 R793 C717 C722 R474 R829 C767 R758 R755 C440 IC413...
Page 95 NX-300(S) NX-300(S) PC BOARD PC BOARD TX-RX UNIT (X57-7830-11) (A/2) TX-RX UNIT (X57-7830-11) (A/2) Component side view (J79-0128-49 A/2) Component side view (J79-0128-49 A/2) C630 C646 C640 R648 R652 R651 R653 C641 R641 C945 Side_G Q504 R654 Side_1 C971 C943 Side_2 Q607 R655...
Page 96 NX-300(S) NX-300(S) PC BOARD PC BOARD TX-RX UNIT (X57-7830-11) (A/2) TX-RX UNIT (X57-7830-11) (A/2) Foil side view (J79-0128-49 A/2) Foil side view (J79-0128-49 A/2) C645 C643 L610 R575 C648 L514 C642 C556 C557 R646 C988 C632 L516 L515 C635 C547 L517 L614 C545...
Page 97 CONTROL UNIT (X53-4432-75) GPIo7 GPIo7 GPIo7 GPIo7 C459 DC SW DC SW L101 470p VOLTAGE REGULATOR (33M) D405,406,IC407 Q401, 402 POWER SUPPLY CN402 ASQDET AUD_IREFC 33A-1 33A-1 C460 AGND CN23 DC/DC CONVERTER LEVEL CONVERTER 7.49V Q414 Q415 X2_CLKIN X2_CLKIN AD12_IREFF L102 6800p VOL SW/ENC...
Page 98 TX-RX UNIT : (X57-7830-11) (A/2) D606, 607 TH600 RF FINAL AMP R : 0.5mV T : 1.615V ANTENNA SWITCH R590 10k 100k R : 12mV Q606 Strip line L903 D606 L612 L613 L614 R589 10k -t ° T : 2.10V RD07MVS1BT122 6.8n C660...
Page 99 IC404 L401 , D406 , D405 Control unit (X53-4432-75) XC6204B332D-G IC407 LT1616ES6-PBF X102 DCDC 18.432MHz Converter SM5023CNDH-G IC107 TCXO IC717 D408 Q402 SSM6N16FE-F XC9235A15CM-G 1SS301F IC101 IC103 DCDC DCSW /PSW Flash Q408 IC414 SRAM IC102 Q401 SSM6N16FE-F EMD12 Memory XC61CC5602N-G IC406 RESET /BINT...
Page 100 TX-RX unit (X57-7830-11) CN900 Q507 I2CCK 2SC5383-T111 Ripple I2CSDA 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 SKY72310-362 2SC5636 2SC5636 HSC277x2 2SC5636 2SK3077F RD01MUS1-T113 RD07MVS1BT122 HVC131x4 Pre- Pre- TCXO_MOD...
Page 101 POWER SW/ CHANNEL AF VOL SELECTOR CORD ASSY CN403 CN23 CN404 CN900 X42-338 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 X41-376 TCXO_MOD TCXO_MOD PGND CN901 RSSI RSSI PGND...

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