Kenwood NX-420 K, Service Manual

Page 1: ...SCEIVER Knob Volume K29 9485 13 Knob Selector K29 9486 13 Knob PTT K29 9500 03 Button knob Side1 Side2 AUX K29 9501 03 Plastic cabinet assy A02 4132 13 Packing 16Key G53 1865 11 Plastic cabinet assy A02 4130 13 Whip antenna T90 1114 05 Knob Volume K29 9485 13 Knob Selector K29 9486 13 Knob PTT K29 9500 03 Button knob Side1 Side2 AUX K29 9501 03 Whip antenna T90 1114 05 NX 420 K NX 420 K3 ...

Page 2: ...n the preparation of this manual JVC KENWOOD Corporation assumes no responsibility for errors or omissions Neither is any liability assumed for damages resulting from the use of the informa tion contained herein JVC KENWOOD Corporation 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 firm...

Page 3: ...ing 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 saf...

Page 4: ...amming interface KPG 22A 22U are required for programming The frequency and signaling data are programmed for the transceiver Frequency range MHz RF power LCD 16 key No Yes No Yes Type TX 806 825MHz 3W 3W NX 420 K NX 420 K3 NO Option YES KMC 21 KMC 45 Speaker microphone or KMC 48GPS GPS speaker microphone Delivery TX RX 851 870MHz TX 806 825MHz TX RX 851 870MHz ...

Page 5: ...ion 1 K3 model 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 K3 model only 3 Panel Test Mode K3 model only Setting method refer to ADJUSTMENT 4 Panel Tuning Mode K3 model only Sett...

Page 6: ...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 10 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 F...

Page 7: ...sword in this procedure CLONE is displayed if the entered password is correct If the pass word 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...

Page 8: ...ers 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 c 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 ...

Page 9: ...using a soft tipped item e g your finger 2 Precautions for Reassembly Mounting the chassis onto the case 1 Place the key top on the chassis Then fit the chassis tightly into the groove of the key top a Note Confirm that the entire groove of the key top fits to the chassis tightly 2 Mount the chassis onto the case b Note After mounting the chassis onto the case if the 16 key part on the key top get...

Page 10: ...g 3 Pinch the supplied mechanical stopper c using 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 selec tor knob and knob spring Connection place of the antenna hot pin and antenna terminal An anten...

Page 11: ...ether 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 13 Sticker B42 7417 04 NEXEDGE is printed 16 key A02 4132 13 Fibrous sheet G10 1827 04 Speaker T07 0787 05 Rubber Cushion SP G11 4272 14 Sheet SP G11 4527 04 Chassis A10 4148 01 Sheet PTT G11...

Page 12: ...a CIRCUIT DESCRIPTION ANT SW RF AMP 1st MIX AF AMP TCXO MIC AMP TX AMP POWER AMP CF 450kHz MCF IF SYSTEM PLL VCO 16 8MHz ANT SP MIC TX 806 825MHz X3 50 4MHz Base band Circuit TX RX 851 870MHz 49 95MHz TX RX SW TX 806 825MHz 851 870MHz RX 1stLo 801 05 820 05MHz Fig 1 Frequency configuration 3 Receiver System 3 1 RF circuit An incoming RF signal from the antenna terminal is passed through the antenn...

Page 13: ...ated noise signal from IC607 after filtering through the LPF and HPF circuit The amplified sig nal is then converted to a DC signal by the detection circuit The converted signal is fed back to IC607 Fig 3 Squelch circuit ASQAPC ASQDET IC607 DET IC1 1 2 AMP RECT AMP IC302 D2 Q3 ASQ LPF IC1 2 2 HPF 4 Transmitter System 4 1 Audio band circuit The signal from the microphone is amplified by IC2 2 2 and...

Page 14: ...es a reference frequency of 16 8MHz for the PLL frequency synthesizer This reference frequency is applied to pin 9 of the PLL IC IC400 and is connected to the IF circuit as a 2nd osc through the Tripler Q300 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 are two VCOs VCO 1 and VCO 2 VCO ...

Page 15: ...C PLL MOD 6 Control Circuit The control circuit consists of CPU in ASIC IC607 and its peripheral circuits CPU 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 Co...

Page 16: ...vel processing CIRCUIT DESCRIPTION 7 Power Supply Circuit The battery voltage B is provided from the battery ter minal on the TX RX unit X57 The battery voltage passes through the 2 5A fuse F500 and goes to the RF final am plifier AVR ICs IC504 IC900 DC DC converter IC505 and voltage detector IC IC506 The voltage detector watches the battery voltage If the battery voltage is 5 6V or higher the det...

Page 17: ...00 33A IC501 33M IC502 15M IC503 33C IC504 50C Q500 SB2 Q504 50T Q505 50R Q503 50CS Ripple filter IC8 LCD driver ASIC IC607 Final AMP APC AFPA 2 pin Jack DSP FLASH SRAM DSP PLL TCXO ASSIST circuit TX circuit RX circuit PLL fin VCO AF circuit AF circuit DAC SQL circuit LED PSW BINT Display unit CN600 CN5 CIRCUIT DESCRIPTION ...

Page 18: ...504 IC Voltage regulator 50C IC505 IC DC DC converter 38M IC506 IC Reset IC600 IC Frash memory IC601 IC DSP IC602 IC Sum amplifire IC603 IC SRAM IC604 IC Reset IC605 IC Motion sensor IC606 IC Buffer amplifire IC607 IC ASIC IC608 609 IC And gate 2 Input IC900 IC Voltage regulator 50V IC901 IC Audio power amplifire Q101 Transistor RF amplifire Q102 FET Pre drive amplifire Q103 Transistor DC switch F...

Page 19: ...h SB2 Q900 Transistor DC switch SB2 Q901 Transistor Switch control Q902 Q902 Transistor DC switch AF AMP Q903 FET Switch control AF mute Q904 FET AF mute switch Q905 FET Level converter Q906 FET AF mute switch D100 Zener diode Over voltage protection D102 105 Diode Antenna switch D200 Diode Limitter D400 Diode Limitter D402 403 Variable capacitnce diode VCO frequency control D404 407 Variable capa...

Page 20: ...L 47 1A G53 1885 03 PACKING JACK 48 1C H12 4312 02 PACKING FIXTURE 49 3C H52 2594 02 ITEM CARTON CASE 51 1D J19 5483 23 HOLDER ACCESSORY 52 1A J19 5547 01 HOLDER FG SP 53 1A J21 8631 03 MOUNTING HARDWARE LCD K3 54 1D J29 0701 25 BELT CLIP ACCESSORY 55 1A J69 0370 04 RING JACK 56 3A J87 0027 05 FPC PTT 57 2A J87 0040 05 FPC VOL SEL 58 1A K29 9485 13 KNOB VOLUME 59 1B K29 9486 13 KNOB SELECTOR 60 1B...

Page 21: ...J334J CHIP R 330K J 1 16W R15 RK73HB1J332J CHIP R 3 3K J 1 16W R16 RK73HB1J470J CHIP R 47 J 1 16W R17 RK73HB1J104J CHIP R 100K J 1 16W R18 RK73HB1J393J CHIP R 39K J 1 16W R19 20 RK73HB1J224J CHIP R 220K J 1 16W R21 22 RK73HB1J563J CHIP R 56K J 1 16W R23 RK73HB1J222J CHIP R 2 2K J 1 16W R24 RK73HB1J000J CHIP R 0 J 1 16W R26 RK73HB1J683J CHIP R 68K J 1 16W R28 30 RK73HB1J000J CHIP R 0 J 1 16W R33 35...

Page 22: ...214 CC73HCH1H040B CHIP C 4 0PF B C215 CC73HCH1H010B CHIP C 1 0PF B C216 217 CC73HCH1H040B CHIP C 4 0PF B C218 CC73HCH1H030B CHIP C 3 0PF B C219 CC73HCH1H101J CHIP C 100PF J C221 CC73HCH1H030B CHIP C 3 0PF B C222 CC73HCH1H101J CHIP C 100PF J C224 CC73HCH1H080B CHIP C 8 0PF B C226 CC73HCH1H101J CHIP C 100PF J C227 CK73HB1E104K CHIP C 0 10UF K C228 CK73HB1E103K CHIP C 0 010UF K C229 CC73HCH1H151J CHI...

Page 23: ...CK73HB1A105K CHIP C 1 0UF K C508 CK73HB1A105K CHIP C 1 0UF K C509 CK73GB0J475K CHIP C 4 7UF K C510 CC73HCH1H101J CHIP C 100PF J C511 CK73HB1H682K CHIP C 6800PF K C512 CK73HB1A104K CHIP C 0 10UF K C513 514 CC73HCH1H101J CHIP C 100PF J C515 CK73HB1H682K CHIP C 6800PF K C516 520 CC73HCH1H101J CHIP C 100PF J C521 522 CK73HB1A105K CHIP C 1 0UF K C523 CK73GB0J106K CHIP C 10UF K C524 CC73HCH1H101J CHIP C...

Page 24: ...3978 45 SMALL FIXED INDUCTOR 39NH L109 L92 0408 05 CHIP FERRITE L112 L34 4550 05 AIR CORE COIL 7 5T L113 L92 0149 05 CHIP FERRITE L114 L41 6878 43 SMALL FIXED INDUCTOR 68NH L115 L40 3975 71 SMALL FIXED INDUCTOR 39NH L116 L34 4563 05 AIR CORE COIL 3T L117 L41 7568 45 SMALL FIXED INDUCTOR 7 5NH L118 L79 1468 05 FILTER MODULE L119 L34 4563 05 AIR CORE COIL 3T L120 L34 4564 05 AIR CORE COIL 4T L190 L3...

Page 25: ...146 RK73HB1J472J CHIP R 4 7K J 1 16W R147 RK73HB1J271J CHIP R 270 J 1 16W R148 RK73HB1J474J CHIP R 470K J 1 16W R149 RK73HB1J473J CHIP R 47K J 1 16W R150 RK73HB1J000J CHIP R 0 J 1 16W R151 RK73HB1J271J CHIP R 270 J 1 16W R152 RK73FB2B000J CHIP R 0 J 1 8W R153 RK73HB1J104J CHIP R 100K J 1 16W R154 RK73HB1J184J CHIP R 180K J 1 16W R155 RK73HB1J104J CHIP R 100K J 1 16W R158 RK73HB1J000J CHIP R 0 J 1 ...

Page 26: ...R2J CHIP R 2 2 J 1 10W R510 RK73HB1J100J CHIP R 10 J 1 16W R511 RK73HB1J102J CHIP R 1 0K J 1 16W R512 RK73HH1J683D CHIP R 68K D 1 16W R513 RK73HH1J333D CHIP R 33K D 1 16W R514 RK73HB1J471J CHIP R 470 J 1 16W R515 RK73GB2A000J CHIP R 0 J 1 10W R516 RK73HH1J394D CHIP R 390K D 1 16W R517 RK73HH1J154D CHIP R 150K D 1 16W R518 RK73HB1J103J CHIP R 10K J 1 16W R520 522 RK73HB1J474J CHIP R 470K J 1 16W R5...

Page 27: ...OS IC IC200 CMY210 MOS IC IC301 TK10931VTL G ANALOGUE IC IC302 BU7242NUX MOS IC IC400 SKY72310 362 MOS IC IC401 XC221A1200MRG MOS IC IC402 BU7462NUX MOS IC IC500 501 NJM2878F4 33 BI POLAR IC IC502 XC9235A15CM G MOS IC IC503 NJM2878F4 33 BI POLAR IC IC504 XC6209B502P G MOS IC IC505 LT1616ES6 PBF ANALOGUE IC IC506 XC61CC5602N G MOS IC IC600 Note1 ROM IC IC601 Note1 DSP IC602 BU7445HFV MOS IC IC603 N...

Page 28: ...46 52 38 MIC1 X54 X54 C 3 X54 B 3 B A A C D B 701 702 703 704 705 706 E E F Display unit A54 376 A 3 TX RX unit X57 837 53 31 11 20 9 10 F Fx2 26 26 40 22 19 57 35 56 S101 37 30 4 1 44 43 8 18 42 47 46x2 23 32 33 6 K3 700 K Fx14 A M2 6X4 N09 2438 05 B M2 6X10 N09 6608 05 C N14 0864 04 D N14 0865 04 E M3X6 N30 3006 43 F M2X5 N83 2005 48 VR1 39 39 41 55 ...

Page 29: ... 700 are not supplied 3 2 1 D C 54 Belt clip J29 0701 25 16 Stopper 16CH D32 0454 04 51 Holder J19 5483 23 7 Cap B09 0686 03 48 Packing fixture H12 4312 02 48 Item carton case H52 2594 02 13 Instruction manual B62 2470 00 708 Pamphlet 66 Whip antenna T90 1114 05 ...

Page 30: ...d Normal voltage FRST C634 3 3V If the FRST is always 0V the ASIC is broken If the FRST repeats 3 3V and 0V at intervals The ASIC FLASH and SRAM may be broken The BGA parts are not broken Checking for an abnormal point 33M has an abnormal voltage ASIC Remove L609 to check the voltage of the 33M If the voltage becomes normal the ASIC is broken DSP Remove L607 to check the voltage of the 33M If the ...

Page 31: ...en the LED color changes red and orange alternately 2 1 K3 model 2 K model A warning tone sounds The frequency data was not written Unprogramming A warning tone does not sound An error occurs when the ASIC internal RAM reads or writes The ASIC may be broken An error occurs when the DSP internal RAM reads or writes The DSP may be broken An error occurs when the SRAM internal RAM reads or writes The...

Page 32: ...g mode When writing to the transceiver a Warning Message corresponding to the item selected appears Click OK to continue writing the data 3 Enter Program Test Mode then adjust the various adjust ment data PC Test Mode as described in the ADJUST MENT 4 Attach the new labels corresponding to the new printed circuit board Refer to the images below for label place ment 5 If necessary write the FPU dat...

Page 33: ... Squelch off icon appears Side2 Wide 5k Wide 4k Narrow Very narrow Analog Wide 5k W Wide 4k S Narrow N NXDN Narrow N Very narrow V Shift to panel tuning mode Function on appears on the LCD display MSK 1200bps and 2400bps 2400bps icon appears Push Test signaling up Hold Test signaling up continuously Signaling No AUX Analog NXDN Analog A NXDN N PTT Transmit Key not appears on the LCD display Functi...

Page 34: ...attern 1031Hz RAN Radio Access Number PN9 Pseudo Random Pattern for production only No 7 No 9 Item PC test mode only Panel Tuning Mode K3 model only Transceiver tuning To enter tuning mode To enter tuning mode press the key while the trans ceiver is in test mode Use the key to write tuning data through tuning modes and the Selector to adjust tuning requirements 1 to 4096 appears on the LCD Use the...

Page 35: ...efore all adjustment items for deviations are adjusted Maximum Deviation NXDN Narrow Very Narrow Maximum Deviation of NXDN Narrow Very Narrow is adjusted Maximum Deviation Analog Wide 5k Wide 4k Narrow Maximum Deviation of Analog Wide 5k Wide 4k Narrow is adjusted This item must be adjusted before all adjustment items for tone deviations are adjusted Note Maximum Deviation Analog Narrow must be ad...

Page 36: ...ion 4 1 1024 10 Maximum Deviation Analog 4 4 4 Transmitter Section 5 1 1024 11 QT Deviation 2 2 2 Transmitter Section 6 1 1024 12 DQT Deviation 2 2 2 Transmitter Section 7 1 1024 13 LTR Deviation 2 2 2 Transmitter Section 8 1 1024 14 DTMF Deviation 2 2 2 Transmitter Section 9 1 1024 15 MSK Deviation 1 1 1 Transmitter Section 11 1 1024 16 CW ID Deviation 1 Transmitter Section 12 1 1024 ADJUSTMENT A...

Page 37: ...eviation NDEV Very Narrow Analog MAX Deviation ADEV Analog MAX Deviation ADEV Narrow Wide 4k QT Deviation QT QT Deviation QT Narrow Panel test mode For all adjustment items press the key to write the adjustment value N W VN Adjustment Item LCD Display 4 reference level Adjustments 4 reference level Adjustments 4 reference level Adjustments 4 reference level Adjustments 4 reference level Adjustment...

Page 38: ...el Adjustments 3 reference level Adjustments 3 reference level Adjustments 3 reference level Adjustments 3 reference level Adjustments Side2 Side2 Side2 Side2 Wide 4k Wide 5k Wide 4k Wide 5k Wide 4k Wide 5k Wide 4k Wide 5k Wide 4k Wide 5k Wide 4k Wide 5k Wide 4k Wide 5k Wide 4k Wide 5k DQT Deviation DQT DTMF Deviation DTMF MSK Deviation MSK Side2 Side2 Side2 Side2 Side2 Side2 Side2 Side2 Side2 Sid...

Page 39: ...equipment which is not used for adjustment is contained in this table Antenna connector adapter The antenna connector of this transceiver uses an SMA terminal Use an antenna connector adapter SMA f BNC f or SMA f N f for adjustment The adapter is not provided as an option so buy a commercially available one Nut wrench In order to turn the volume nut and the channel selector nut use a recommendatio...

Page 40: ... Transmit button Power meter Ammeter Check 2 7W 3 3W 2 0A or less 2 CH Sig 2 1 TA PTT ON 2 Test Channel Channel 2 Test Signaling Mode Analog Signaling 1 Talk Around ON PTT Press Transmit button 3 Low power check Batt 7 5V 1 CH Sig 2 1 PTT ON 1 Test Channel Channel 2 Test Signaling Mode Analog Signaling 1 PTT Press Transmit button 0 7W 1 3W 1 1A or less 2 CH Sig 2 1 TA PTT ON 2 Test Channel Channel...

Page 41: ...st equipment Unit Terminal Unit Parts Method 1 Setting 1 BATT terminal voltage 7 5V 2 SSG standard modulation Wide 5k MOD 1kHz DEV 3kHz Wide 4k MOD 1kHz DEV 2 4kHz Narrow MOD 1kHz DEV 1 5kHz 2 Counter clockwise Volume 1 Adj item VOL1 Adjust 1 Adj item Counterclockwise Volume Panel tuning mode Turn the volume knob counterclock wise fully Press key to store the adjustment value PC test mode Turn the...

Page 42: ...l Adjustment Press Apply All button to store the adjustment value after all adjustment points have been adjusted Note The assist adjust ment value must be between from 340 to 3550 5 Transmit Assist This adjustment can be performed only in PC test mode Manual Adjustment 1 Adj item Transmit Assist 2 Adj item Low High Low TA High TA PTT Press Transmit button Press Apply All button to store the adjust...

Page 43: ...g to change 20Hz and 2kHz 20Hz not appears 2kHz appears 1 Adj item Balance Deviation meter LPF 3kHz HPF OFF 2 Adj item Low High Low TA High TA PTT Press Trans mit button Press Apply All button to store the adjustment value 2kHz Sine Wave Check box Check while transmitting change to 2kHz Deviation meter Oscilloscope Panel ANT Panel Panel tuning mode Selector PC test mode The Deviation of 20Hz frequ...

Page 44: ... Deviation meter LPF 15kHz HPF OFF 2 Adj item A DEV_ A D E V _ A DEV_ TA A D E V _ TA Adjust PTT ON Press key to store the adjust ment value 1 Adj item Maximum Deviation Analog Narrow Deviation meter LPF 15kHz HPF OFF 2 Adj item Low High Low TA High TA PTT Press Transmit button Press Apply All button to store the adjustment value 2100Hz Write the value as followings 513 Reference value 2050 2150Hz...

Page 45: ... of all analog signalings 6 QT Deviation 4 Narrow 1 Adj item QT Adjust 2 Adj item Q T _ _ _ Q T _ _ _ TA Deviation meter LPF 3kHz HPF OFF PTT ON Press key to store the adjust ment value 1 Adj item QT Deviation Analog Narrow 2 Adj item Hight Hight TA Deviation meter LPF 3kHz HPF OFF PTT Press Transmit button Press Apply button to store the adjust ment value Deviation meter Oscilloscope Panel ANT Pa...

Page 46: ..._ _ D Q T _ _ TA PTT ON Press key to store the adjust ment value 1 Adj item DQT Devia tion Analog Wide 5k 2 Adj item Hight Hight TA PTT Press Transmit button Press Apply button to store the adjust ment value 0 75kHz 0 05kHz 8 LTR Deviation 4 Narrow 1 Adj item LTR Adjust 2 Adj item L T R _ _ L T R _ _ TA Deviation meter LPF 3kHz HPF OFF PTT ON Press key to store the adjust ment value 1 Adj item LTR...

Page 47: ...2 Adj item D T M F _ D T M F _ TA PTT ON Press key to store the adjust ment value 1 Adj item DTMF Deviation Analog Wide 4k 2 Adj item Hight Hight TA PTT Press Transmit button Press Apply button to store the adjust ment value Wide 5k 1 Adj item DTMF Adjust 2 Adj item D T M F _ D T M F _ TA PTT ON Press key to store the adjust ment value 1 Adj item DTMF Deviation Analog Wide 5k 2 Adj item Hight High...

Page 48: ...tion meter LPF 15kHz HPF OFF PTT ON Press key to store the adjust ment value 1 Adj item CW ID Deviation NXDN Very Narrow Deviation meter LPF 15kHz HPF OFF PTT Press Transmit button Press Apply button to store the adjust ment value Write the value as followings 376 Reference value 1 00kHz 0 10kHz 4 Refer to the Necessary Deviation adjustment item for each signaling and mode table on page 70 13 Batt...

Page 49: ...just Step 2 Maximum Deviation Analog Wide 5k Step 3 LTR Deviation Wide 5k Step 1 Balance adjust Step 2 Maximum Deviation Analog Wide 4k Step 3 LTR Deviation Wide 4k Step 1 Balance adjust Step 2 Maximum Deviation Analog Narrow Step 3 LTR Deviation Narrow DTMF Step 1 Balance adjust Step 2 Maximum Deviation Analog Wide 5k Step 3 DTMF Deviation Wide 5k Step 1 Balance adjust Step 2 Maximum Deviation An...

Page 50: ...NT SP MIC connector Panel tuning mode After input signal from SSG press key to store the adjustment value PC test mode After input signal from SSG press Apply button to store the adjust ment value Analog Wide 4k 1 Adj item RRSS Adjust 2 Adj item R RSS_ R R S S_ R R S S _ SSG output 12dB SINAD level 3dB MOD 1kHz 2 4kHz 1 Adj item RSSI Reference Analog Wide 4k 2 Adj item Low Center High SSG output 1...

Page 51: ...j item Open Squelch Analog Wide 4k 2 Adj item Low Center High SSG output 12dB SINAD level MOD 1kHz 2 4kHz Analog Wide 5k 1 Adj item SQL Adjust 2 Adj item S QL__ S Q L __ S Q L _ _ SSG output 12dB SINAD level MOD 1kHz 3kHz 1 Adj item Open Squelch Analog Wide 5k 2 Adj item Low Center High SSG output 12dB SINAD level MOD 1kHz 3kHz NXDN Very Narrow 1 Adj item SQL Adjust 2 Adj item S QL__ S Q L __ S Q ...

Page 52: ...I Analog Wide 5k 2 Adj item Low Center High SSG output 118dBm 0 28µV MOD 1kHz 3kHz NXDN Very Narrow 1 Adj item LRSS Adjust 2 Adj item L RSS_ L R S S_ L R S S _ SSG output 118dBm 0 28µV MOD 1kHz 1 5kHz 1 Adj item Low RSSI NXDN Very Nar row 2 Adj item Low Center High SSG output 118dBm 0 28µV MOD 1kHz 1 5kHz Adjust with the ana log signal 7 Because Low RSSI at 118dBm NXDN Narrow is adjusted by adjust...

Page 53: ...m SQLT Adjust 2 Adj item S QLT_ S Q L T_ S Q L T _ SSG output 12dB SINAD level 5dB MOD 1kHz 1 5kHz 1 Adj item Tight Squelch Analog Narrow 2 Adj item Low Center High SSG output 12dB SINAD level 5dB MOD 1kHz 1 5kHz SSG Panel ANT SP MIC connector Panel tuning mode After input signal from SSG press B key to store the adjustment value PC test mode After input signal from SSG press Apply button to store...

Page 54: ...fuse 2 SB1 I Power input after power switch 3 NC No connection 4 33A O 33A output Pin No Name I O Function 5 VOL I Volume level input for audio control 6 VOL_GND GND for volume level 7 ENC3 I Rotary switch input 8 GND GND 9 ENC4 I Rotary switch input 10 ENC2 I Rotary switch input 11 ENC1 I Rotary switch input CN600 1 SB2 O SB2 output 2 MICI O MIC modulation output 3 GND GND 4 SPAF I AF input for A...

Page 55: ...Normal 3 MICO O Analog Internal MIC output 4 OPTDET I Digital External option detection Zin 74k 5 50V O Power DC 5V output Output Voltage 4 9 5 0 5 1 V Io 30mA Maximum Output Current 100 mA 6 AE GND GND Maximum Input Current 700 mA 7 TXD O Digital TXD output Zout 6 8k Output Voltage High 4 9 5 0 5 1 V Load Open Output Voltage Low 0 0 1 V Load Open 8 SPI I Analog Internal Speaker input 9 SPO O Anal...

Page 56: ...90 C93 C1 C4 CP10 CP11 D15 CP12 D16 CP13 CP14 L2 L3 IC8 1 16 17 32 33 48 49 64 Q1 3 4 1 5 Q6 Q8 R1 R3 R5 R6 R7 S1 AUX S2 PTT S3 Side1 R65 R66 R72 R73 R75 CP2 CP3 CP4 CP5 CP6 C85 C94 D1 MIC1 D19 D18 L1 Q7 R67 R69 R70 R71 R74 R76 R83 CP7 CP8 CP9 DISPLAY UNIT X54 3760 XX 10 K3 12 K Component side view J79 0312 09 NX 420 PC BOARD ...

Page 57: ... 1 D7 D8 D9 D10 D11 D12 D13 D14 S4 Side2 R61 R62 R63 R64 DISPLAY UNIT X54 3760 XX 10 K3 12 K Component side view J79 0312 09 Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 Ref No Address IC8 7F Q1 8C Q6 9D Q7 9D Q8 8D D1 8B D7 7Q D8 5Q D9 7P Ref No Address D10 5P D11 7O D12 5O D13 8N D14 4N D15 5E D16 5E D18 5H D19 7H PC BOARD NX 420 ...

Page 58: ...2 GND LCDCS EVCS DISP_VER SDO0 SDI0 SCK0 33M 1 24 C22 C23 C25 C26 C28 C29 C31 C33 C34 C36 C40 C42 C44 C2 C3 C5 D2 D3 TH1 R10 R11 R14 R17 R18 Q2 Q3 Q4 R2 R4 R39 R8 R84 R86 R88 C11 C13 DISPLAY UNIT X54 3760 XX 10 K3 12 K Foil side view J79 0312 09 Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 Ref No Address IC1 4I IC2 6L IC4 8N IC6 7M Q2 4I Q3 4H Ref No Address Q4 4J Q5 4K D2 5G D3 4J D4 ...

Page 59: ...8 R81 1 6 7 12 13 18 19 24 CN6 J79 0312 09 C 3 J79 0312 09 B 3 J79 0312 09 A 3 GND 1 6 PTT S1 S2 EMG GND SB2 MICI GND SPAF TV1 TV2 33A 24 C30 C37 C33 C34 C35 C36 C39 C40 C42 C43 C44 C45 C47 C58 C67 C68 C70 C74 C2 C3 D3 D4 IC2 4 5 1 8 IC4 R10 R22 Q4 R28 Q5 R29 R33 R34 R2 R4 R39 R8 R40 R44 R45 R50 R79 R84 CP1 C91 DISPLAY UNIT X54 3760 XX 10 K3 12 K Foil side view J79 0312 09 PC BOARD NX 420 ...

Page 60: ...68 C669 L501 C670 L505 C671 C672 L507 C673 C674 IC401 C675 IC402 C677 C678 C679 IC600 IC601 C681 IC602 C682 IC603 C683 IC604 C684 IC605 C685 IC606 IC607 IC608 IC609 CP600 CP601 CP602 CP603 CP605 CP606 R501 R507 R508 R510 CN300 R512 R513 R515 R523 R53 C503 C508 C509 TP600 TP601 TP602 TP603 TP604 TP605 TP606 C522 C523 TP607 C524 C525 C526 C527 C529 R2 C532 R956 R957 C534 C537 C547 C548 C549 C551 Q40...

Page 61: ...21 R123 R127 R514 R516 R517 R518 R130 R901 R131 R902 R132 R133 CN500 R904 CN501 R905 R906 CN502 CN503 R907 R908 R520 R138 R521 R909 R139 R522 R524 R526 TH100 R910 R911 R141 R912 R142 R913 R144 R145 R146 R148 R531 R149 R532 CN900 CN901 CN902 R150 R920 C115 R153 C117 C500 R154 C501 R155 R158 C122 C511 C129 C513 C514 C515 C516 C517 C518 C519 C902 C903 C904 C905 C906 C907 C908 C520 C909 C910 C141 C911...

Page 62: ...24 R160 C126 C130 C133 C136 C138 C140 C143 C915 C145 C916 C146 C917 C918 C919 C920 C150 C151 C921 C152 C923 C153 C154 C924 C155 C156 C157 C158 C159 D102 D103 Q G G D104 D105 C168 C169 Q401 C171 C172 C173 Q404 S G S D D G C175 C177 C178 C181 C182 C183 C185 L405 L407 L409 L216 L217 D900 L218 C190 C191 L219 C192 L411 L414 L425 L426 L427 L428 L429 S S Ref No Address Ref No Address Ref No Address Ref N...

Page 63: ...4 19 7 12 6 18 13 C481 C482 C483 C484 C486 C487 C488 489 C496 CP400 R100 R300 R301 R303 R304 R305 R306 R308 R309 R310 XF300 R313 R317 R318 R319 R511 R321 R322 R323 R324 R325 R326 R327 R328 R329 R330 C100 R331 R527 R333 103 R528 R334 R529 R335 R336 R337 R338 C300 R530 C301 C302 C303 R533 R534 R340 R535 C306 R536 C307 R538 C309 C310 R541 C506 C312 R542 C313 R543 C314 R545 C315 C316 C317 C318 C319 C5...

Page 64: ...Vrms W4 108 9mVrms Nw IC4 DAC C902 41 0mVrms 56 6mVrms VCO IC6 IC607 ASIC To make measurements in the AF section connect the AC level meter ANT input 47dBm 1kHz FM 3kHz DEV Wide 5kHz In the RF section use a 100pF coupling capacitor The display shows the SSG input value required to obtain 12dB SINAD without local level AG is set to the MIC input becomes 3kHz 2 4kHz 1 5kHz at 1kHz MOD Wide 5kHz Wide...

Page 65: ... 3 S1 4 S2 5 EMG 6 1 2 3 4 5 6 GND CN6 GND PTT S1 S2 EMG GND CN902 1 MIC 2 MIC 3 SP 4 SP CN500 1 B 2 SB1 3 NC 4 33A 5 VOL 6 VOL_GND 7 ENC3 8 GND 9 ENC4 10 ENC2 11 ENC1 J900 PTT RXD MICI MICO OPTDET 50V J901 AE TXD SPI SPO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 S BATTERY 7 5V INT SP INT MIC EXT SP EXT MIC TX RX UNIT X57 8370 10 DISPLAY ...

Page 66: ...CKLIGHT KEY BACKLIGHT HN2S03FE 1SS388F B30 2210 05 2SC5383 T111 2SA1362 F GR 2SC5383 T111 B30 2337 05 CP2 RK74HB1J102J CP3 CP4 RK74HB1J102J CP5 RK74HB1J102J CP6 CP7 CP8 RK74HB1J102J CP9 CP10 RK74HB1J101J CP11 CP12 CP13 CP14 D10 D11 D13 D14 HN2S03FE D15 D18 B30 2210 05 D19 B30 2210 05 IC8 LC75857W E Q6 2SA1362 F GR Q7 2SC5383 T111 Q8 2SC5383 T111 S5 S70 0519 05 S70 0519 05 S6 S70 0519 05 S8 S7 S70 ...

Page 67: ...A IN A VSS 5 IN B 6 IN B 7 oUTB 8 VDD R17 100k R19 220k R9 33k C22 0 22u R4 82k R2 10k R15 3 3k C25 C5 0 1u C10 100p C20 1000p R14 330k D2 KDR731 R8 15k C2 680p KTC4075E Y GR Q3 R11 330k R13 470 C3 27p C6 1000p R20 220k C8 S1 S70 0516 05 C11 680p SSM3K15TE F Q2 R12 330k C30 1u R21 56k C32 1200p R22 56k C38 180p R26 68k R16 47 R10 0 IC2 TC75W51FK F 1 2 3 4 oUTA IN A IN A VSS 5 IN B 6 IN B 7 oUTB 8 ...

Page 68: ...C604 XC6119C29ANR 1 VIN 2 VSS 4 VoUT 3 CD C647 1u C632 0 01u C631 1u IC603 L1024GL 70LLI A1 A0 A2 A1 A3 CE2 A4 A3 A5 A6 A6 A8 B1 DQ4 B2 A2 B3 WE B4 A4 B5 A7 B6 DQ0 C1 DQ5 C3 NC1 C4 A5 C6 DQ1 G2 oE G3 CE E1 VCC2 E6 VSS2 F1 DQ6 F3 NC2 F4 NC3 F6 DQ2 G1 DQ7 H3 A11 H4 A12 G4 A16 G5 A15 G6 DQ3 H1 A9 H2 A10 D1 VSS1 D6 VCC1 H5 A13 H6 A14 R623 470k C634 1000p L606 L605 C628 C621 C626 C610 47p C611 47p R620...

Page 69: ...A 4 K6 A 3 K7 A 2 M7 A 1 L7 A 0 H11 A 0 F2 X2 CLKIN A2 VSS_1 B1 VSS_2 B9 VSS_3 B11 VSS_4 C2 VSS_5 C5 VSS_6 C7 VSS_7 C11 VSS_8 D11 VSS_9 E4 VSS_10 E5 VSS_11 E13 VSS_12 F4 VSS_13 F11 VSS_14 K4 VSS_15 K5 VSS_16 M3 VSS_17 M5 VSS_18 M13 VSS_19 N1 VSS_20 N2 VSS_21 N9 VSS_22 N10 VSS_23 N14 VSS_24 P1 VSS_25 P2 VSS_26 G12 USBPLLVSS E12 ADVSS B14 AVSS_1 C13 AVSS_2 A4 DVDD_1 A8 DVDD_2 D9 DVDD_3 E3 DVDD_4 E6 ...

Page 70: ... D2 FCDADC E2 IFADCP E3 IFADCN D1 IFVR R3 AGCDAC A8 MCCK0 D11 MCI0 B9 MCo0 B10 MCCS0 A7 MCCK1 B8 MCI1 C9 MCo1 B7 MCCX1 D9 MCCR1 C8 MCCK2 D10 MCCS2 C7 MCo2 D7 VoINT D8 VFRM N1 RSSIT M3 PSRPLL M2 PSRIF L4 PSRRF P1 RXSLT N2 RXRVE N3 PSTPLL R1 PSTIF M4 PSTPA P2 TMoD P3 TRAMP R2 TXRVE R6 FSDET R5 SYMTIM C12 SIMDT D12 SIMCK C11 SIMRST T9 GPIo0 V9 GPIo1 U9 GPIo2 V10 GPIo3 T7 GPIo4 R7 GPIo5 R8 GPIo6 U8 GP...

Page 71: ...608 TC7SH08FU F 1 2 3 INB INA GND 4 oUTY 5 VCC CN503 SB1 CN501 B C513 C518 C519 C520 100p CP500 100kX4 C508 1u C506 1u C522 1u R507 68k IC500 NJM2878F4 33 1 2 CoNTRoL GND 4 VIN 3 VoUT C521 1u IC501 NJM2878F4 33 1 CoNTRoL 2 GND 4 VIN 3 VoUT L503 D501 1SS388F C512 0 1u XC6209B502P G IC504 1 2 3 NC VSS CE 4 VIN 5 VoUT CN502 GND R501 0 R516 390k R517 150k C551 10u R505 2 2k C516 100p 100p 100p 100p 10...

Page 72: ...R416 10M C435 100p C429 100p C421 100p C415 100p R414 47k D400 DA221 IC401 XC221A1200MRG 1 2 3 VoUT VDD IN 4 IN 5 VSS R423 47k R417 470k C438 0 1u R408 1k C432 0 1u R424 68k R524 2 7k C554 1000p C545 100p C553 1u 2SA1955A F Q504 D505 1SS388F R520 470k R532 1k R526 470k R430 220k R432 18k C437 1000p R428 1k R431 120k C405 1000p C427 100p R411 47 C444 100p TH400 100k C400 0 01u L400 R433 2 2k R426 1...

Page 73: ... 270n D405 1SV325F C467 0 5p D406 HVC376B C452 1p L422 2 2n C451 1 5p R462 100 C450 6p R456 100k D407 HVC376B C441 100p C459 6p MCH3914 8 H Q401 R458 100 C463 5p C460 5p L416 270n L409 270n C473 10p R454 100 C469 0 5p C475 4p R436 100k C482 15p C478 100p C458 3p L410 220n L424 10n L417 270n C449 7p C442 470p C483 1 5p C455 0 5p R449 100k R459 100 C480 12p R434 0 D402 1SV323F C466 100p C476 100p L4...

Page 74: ... 2p C493 4p C495 5p R469 2 2k C486 100p R466 270 C494 12p R465 6 8k C216 4p R108 330 R116 4 7k R104 3 9k R118 470 C209 1p C119 100p C215 1p C114 100p C105 100p C118 100p C120 0 1u R115 470 C102 0 01u R117 12 R119 10k C210 3p C107 100p R111 39 C207 1p C116 100p L210 8 2n C108 100p 2SC5636 Q101 C123 0 1u L205 6 8n L207 5 6n R103 1 8k C213 2p R110 22 C112 0 1u C217 4p R113 330 L105 R106 33 C124 100p ...

Page 75: ...15 12n R212 68k D200 HSB88AS E C230 100p L217 L79 1928 05 OUT IN C221 3p L214 1 6n R206 470k C218 3p C237 100p R203 470 R207 470k BB505CES TL E Q200 L216 6 8n C232 100p R211 33k L211 7 5n R214 68k R210 2 2 L218 5 1n L213 R215 470k R201 470 C231 100p R202 12 R216 470k C219 100p R208 0 C238 100p C224 8p C226 100p L212 L79 1928 05 OUT IN C222 100p C234 2p C236 10p R213 100k C228 0 01u R144 150k R145 ...

Page 76: ...S IF_DET 33C SB2 33MDSP 15MDSP IC608 TC7SH08FU F PCS PCS_DSP PCS_RF PTT Side1 Side2 CN604 SD01 PLL MOD IC609 TC7SH08FU F SCK1 PCK _DSP PCK_RF 33C 50C BEEP RXAF VOICE 50C 33A VCO_MOD MIC SDO0 SCK0 EVCS LCDCS T_R DSW APCSW PDSW ASSIST TXC RXC SAVE SBC DDCLK EXTMICSW PCK_DSP PCS_DSP PLL MOD RX 801 05 820 05MHz TX 806 00 825 00MHz TA 851 00 870 00MHz EMG Selector Volume CN500 ENC1 ENC2 ENC3 ENC4 33A V...

Page 77: ...0931VTL G BPF CF300 450kHz LPF Q407 2SC5636 Q405 2SC5636 VCO Q401 Q402 MCH3914 8 H D402 D405 1SV325F D406 D407 HVC376B D408 D409 1SV278F T R SW 1 1 IC402 2 2 BU7462NUX 50CS Q301 2SC5108 Y F IC100 NJM12904RB1 BATT 7 5V S S DET AVR 50C DC SW 33C 50R 50T RXC TXC SBC IC504 XC6209B502P G IC503 NJM2878F4 33 Q505 EMD5 Q503 EM6M1 33M 15M 33A DC SW 50CS SAVE Q502 LTC014EEBFS8 Q504 2SA1955A F T_R 38M 1st Lo...

Page 78: ...cklight KEY Backlight TX BUSY LED Q6 2SA1362 F GR Q7 2SC5383 T111 D7 D14 B30 2337 05 Q8 2SC5383 T111 VREF 33A DAC IC4 R2A20178NP D1 B30 2278 05 Q1 UMG9N LEDR 3 8 LEDG 4 8 TV1 TV2 AMP DET Q3 KTC4075E Y GR D2 KDR731 Q2 SSM3K15TE F BW SW SQ_SW 2 8 LPF DAC DAC IC2 1 2 TC75W51FK F IC4 6 8 R2A20178NP IC4 5 8 R2A20178NP ASQ RXAF_2 SPAF VOX MICI MIC MOD VCO_MOD IC2 2 2 TC75W51FK F AMP AGC MOD AMP BUFF 33A...

Page 79: ...10 5 x 36 9 mm with KNB 55L 2 20 x 4 35 x 1 48 in 56 x 110 5 x 37 5 mm with KNB 56N 2 20 x 4 35 x 1 70 in 56 x 110 5 x 43 2 mm with KNB 57L 2 20 x 4 35 x 1 56 in 56 x 110 5 x 39 5 mm Weight net Radio only K 7 2 oz 205g K3 7 4 oz 210g with KNB 55L K 10 6 oz 300g K3 10 8 oz 305g with KNB 56N K 14 1 oz 400g K3 14 3 oz 405g with KNB 57L K 11 5 oz 325g K3 11 6 oz 330g RECEIVER Sensitivity Digital 6 25k...

Page 80: ...NX 420 ...

Page 81: ... Side1 S5 S S9 S8 7 S7 4 S6 1 R65 R66 R72 R73 R75 CP2 CP3 CP4 CP5 CP6 C85 C94 D1 MIC1 D19 D18 L1 Q7 R67 R69 R70 R71 R74 R76 R83 CP7 CP8 CP9 D7 D8 D9 D10 D11 D12 D13 D14 S4 Side2 R61 R62 R63 R64 DISPLAY UNIT X54 3760 XX 10 K3 12 K Component side view J79 0312 09 DISPLAY UNIT X54 3760 XX 10 K3 12 K Component side view J79 0312 09 Component side Foil side Layer 1 Layer 2 Layer 3 Layer 4 Ref No Addres...

Page 82: ... VCO_MOD GND MOD 50C MIC VOX ASQAPC ASQ RXAF_2 GND LCDCS EVCS DISP_VER SDO0 SDI0 SCK0 33M 1 24 C22 C23 C25 C26 C28 C29 C30 C37 C31 C33 C34 C35 C36 C39 C40 C42 C43 C44 C45 C47 C58 C67 C68 C70 C74 C2 C3 C5 D2 D3 D4 TH1 IC2 4 5 1 8 IC4 R10 R11 R14 R17 R18 R22 Q2 Q3 Q4 R28 Q5 R29 R33 R34 R2 R4 R39 R8 R40 R44 R45 R50 R79 R84 R86 R88 CP1 C11 C13 C91 DISPLAY UNIT X54 3760 XX 10 K3 12 K Foil side view J79...

Page 83: ...09 CP600 CP601 CP602 CP603 CP604 CP605 CP606 R114 R500 R501 R502 R504 R505 R506 R507 R508 R121 R123 R127 R510 CN300 R512 R513 R514 R515 R516 R517 R518 R130 R901 R131 R902 R132 R133 CN500 R904 CN501 R905 R906 CN502 CN503 R907 R908 R520 R138 R521 R909 R139 R522 R523 R524 R526 TH100 R910 R911 R141 R912 R142 R913 R144 R145 R146 R148 R531 R149 R532 CN900 CN901 CN902 R150 R920 C115 R153 C117 C500 R154 C...

Page 84: ...R143 R914 R338 C108 L190 L191 R916 R917 R147 C300 R918 R530 C301 R919 C302 C303 R533 C110 R534 R340 C111 R535 C112 C306 R536 C113 C307 C114 R538 C309 R151 C116 R152 C118 C119 C310 R541 C506 C312 R542 C313 R543 C120 C314 R545 C121 C315 C316 C317 C123 C124 R160 C318 C319 C126 C510 C512 C320 C321 C322 C323 C130 C325 C326 C327 C133 C329 C136 C138 C521 C330 C331 C332 C333 C334 C140 C335 C336 C337 C143 ...

Page 85: ... 0 CP604 100X4 C643 0 01u R626 10k C642 0 1u R516 390k R517 150k R640 0 CP605 0X4 RXD TXD R433 2 2k C551 10u C302 10p R300 1k C303 0 01u C306 10p R505 2 2k C516 100p 100p 100p 100p 100p R508 2 2 R909 6 8k Q905 UPA672T A R911 47k R630 10 R629 10 L608 CN600 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 R426 100k R158 0 R148 470k C671 10u C663 10u CN500 1 B 2 SB1 3 NC 4 33A 5 VOL 6 V...

Page 86: ...FK F IC402 2 2 BU7462NUX 50CS 50CS IF_DET Q301 2SC5108 Y F IC100 NJM12904RB1 33C SB2 BATT 7 5V S S DET AVR 50C DC SW 33C 50R 50T RXC TXC SBC IC504 XC6209B502P G IC503 NJM2878F4 33 Q505 EMD5 Q503 EM6M1 33M 15M 33A 33MDSP 15MDSP IC608 TC7SH08FU F PCS PCS_DSP PCS_RF PTT Side1 Side2 CN604 SD01 PLL MOD IC609 TC7SH08FU F SCK1 PCK _DSP PCK_RF 33C 50C DC SW 50CS SAVE Q502 LTC014EEBFS8 Q504 2SA1955A F BEEP...