Kenwood NX-820H Service Manual

Uhf digital transceiver

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Instruction manual (24 pages)

Instruction manual (72 pages)

Instruction manual (72 pages)

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Page 1: Table Of Contents
UHF DIGITAL TRANSCEIVER NX-820H(G)/820H SERVICE MANUAL © 2012-9 PRINTED IN JA PAN B53-7033-00 ( Y ) 672 Key top Modular jack Panel assy Badge (K29-9479-01) (E58-0535-05) (A62-1200-03) (B43-1675-04) CONTENTS GENERAL ............2 TERMINAL FUNCTION ......56 SYSTEM SET-UP .........4 PC BOARD REALIGNMENT ...........4 DISPLAY UNIT (X54-3830-10) ....60...
Page 2: General
Disclaimer While every precaution has been taken in the preparation Transceivers containing AMBE+2™ Vocoder: of this manual, JVC KENWOOD Corporation assumes no The AMBE+2™ voice coding technology is embedded in responsibility for errors or omissions. Neither is any liability the ﬁ rmware under the license of Digital Voice Systems, Inc.
Page 3 4. INSTALLATION PLANNING – CONTROL STATIONS 4-1. Antenna system Control station. The antenna system selection depends on many factors and is beyond the scope of this manual. Your KENWOOD dealer can help you select an antenna sys- Antenna ACC. cap connector W/GPS Type tem that will best serve your particular needs.
Page 4: System Set-Up
NX-820H(G)/820H SYSTEM SET-UP Merchandise received Frequency range (MHz) RF power Type 450~520 NX-820H(G)K/820HK Choose the type of transceiver 400~470 NX-820H(G)K2/820HK2 See page 4. Transceiver programming A personal computer, programming interface (KPG-46A/46U), and FPU (programming software) are required for programming. KCT-60...
Page 5 NX-820H(G)/820H REALIGNMENT 5-2. Connection procedure 1. Connect the transceiver to the computer using the inter- face cable. KPG-46A or KPG-46U Tuning cable Note: (E30-3383-05) • You must install the KPG-46U driver in the computer to use the USB programming interface cable (KPG-46U).
Page 6: Clone Mode
NX-820H(G)/820H REALIGNMENT correct, “CLONE LOCK” is redisplayed. 6-4. Function If you press the [ key while “FIRM PRG” is displayed, the checksum is calculated, and a result is displayed.If you press the [ key again while the checksum isdisplayed, “FIRM PRG” is redisplayed.
Page 7: Installation
NX-820H(G)/820H INSTALLATION 2-1. Installation Procedure 1. Connection Cable (KCT-60: Option) 1. Remove the ACC. cap on the rear of the transceiver. The KCT-60 connection cable kit is used to connect the 2. Connect the D-sub connector of the KCT-60 to the D-sub transceiver to a Horn alert cable, KCT-18 (Ignition sense 15-pin terminal of the transceiver.
Page 8 NX-820H(G)/820H INSTALLATION Remove the R664, R635, R662, R659, R658 and R632 4. External Speaker (Option) chip jumpers and solder the chip jumpers to R666, R633, R665, R663, R660 and R630. 4-1. KES-5 External speaker KES-5 can be installed for KCT-60.
Page 9: Disassembly For Repair
NX-820H(G)/820H DISASSEMBLY FOR REPAIR 3. Disconnect the ﬂ at cable from connector of the panel as- 1. Disassembly Procedure sembly. 1. Remove the cabinet, top packing and shielding plate of the transceiver. Cabinet Flat cable 4. Hook the finger to hole and while pulling the speaker holder to this side, expand the panel side of a to c , and remove the speaker holder from the front panel.
Page 10 NX-820H(G)/820H DISASSEMBLY FOR REPAIR Note: 2. When mounting the panel assembly, pass the ﬂ at cable through the hole of the chassis as shown below then con- When you supply power to the TX-RX PCB after remov- nect the ﬂ at cable to connector of the panel assembly.
Page 11: Circuit Description
NX-820H(G)/820H CIRCUIT DESCRIPTION 1. Overview 3. Receiver System The NX-820 is a UHF Mobile transceiver designed to 3-1. RF circuit operate in the frequency range of 450 to 520MHz(K-type) An incoming RF signal from the antenna terminal is or 400 to 470MHz(K2-type). The unit consists of a receiver,...
Page 12 NX-820H(G)/820H CIRCUIT DESCRIPTION 3-3. Audio ampliﬁ er circuit 4-2. Base Band Circuit Audio processing (high-pass filter, low-pass filter, de- The audio signal output from the Audio band circuit is emphasized and so on) in FM mode and decoding in NXDN converted to digital data with a sampling frequency of 48 mode are processed by the DSP (IC502).
Page 13 NX-820H(G)/820H CIRCUIT DESCRIPTION 5-3. PLL IC (IC2) 5. PLL Frequency Synthesizer The PLL IC compares the differences in phases of the 5-1. TCXO (X1) VCO oscillation frequency and the TCXO reference fre- The TCXO (X1) generates a reference frequency of quency, returns the difference to the VCO CV terminal and 16.8MHz for the PLL frequency synthesizer.
Page 14 NX-820H(G)/820H CIRCUIT DESCRIPTION 6. Control Circuit 6-5. DSP The DSP circuit consists of a DSP (IC502) and process- The control circuit consists of the ASIC (IC507) and its pe- es the base band signal. The DSP operates on an external ripheral circuits.
Page 15 NX-820H(G)/820H CIRCUIT DESCRIPTION Fig. 16 Power supply circuit...
Page 16 NX-820H(G)/820H CIRCUIT DESCRIPTION 8. Signaling Circuit 8-1. Encode (QT/DQT/DTMF/2TONE/MSK) Each signaling data signal of the QT, DQT, DTMF, 2TONE and MSK is generated by the DSP circuit, superposed on a modulation signal and output from the ASIC (IC507). Each deviation of the TX QT, DQT, DTMF, 2TONE and MSK tones are adjusted by changing the output level of the DSP (IC502) and the resulting signal is routed to the VCO and PLL.
Page 17: Components Description
NX-820H(G)/820H COMPONENTS DESCRIPTION Display unit (X54-3830-10) TX-RX unit (X57-8240-1X) Ref.No Part Name Description Ref.No Part Name Description LCD Driver AVR(80C) TRANSISTOR TX/Busy LED Switch PLL System TRANSISTOR TX/Busy LED Switch DC AMP(CV/Assist) TRANSISTOR LCD Backlight Switch IC102 TX Power Module...
Page 18 NX-820H(G)/820H COMPONENTS DESCRIPTION Ref. No Part Name Description Ref. No Part Name Description Transistor DC Switch(Assist) Zener Diode Over Voltage Protection Variable Capaci- DC Switch(Assist) RX VCO Frequency Control tance Diode Transistor Ripple Filter Variable Capaci- TX VCO Frequency Control...
Page 19: Parts List
Les articles non mentionnes dans le Parts No. ne sont pas fournis. C : China X : Australia M : Oth er Areas Teile ohne Parts No. werden nicht geliefert. NX-820H(G) / 820H DISPLAY UNIT (X54-3830-10) Desti- Desti- Ref. No. Ad dress Parts No.
Page 20 NX-820H(G)/820H PARTS LIST DISPLAY UNIT (X54-3830-10) TX-RX UNIT (X57-8240-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R38 -40 RK73HB1J472J CHIP R 4.7K 1/16W CK73HB0J105K CHIP C 1.0UF...
Page 21 NX-820H(G)/820H PARTS LIST TX-RX UNIT (X57-8240-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C219 CK73HB1H471K CHIP C 470PF C142 CC73HCH1H220J CHIP C 22PF HGK2,HK2 C220 CC73HCH1H120G CHIP C...
Page 22 NX-820H(G)/820H PARTS LIST TX-RX UNIT (X57-8240-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C326 CC73HCH1H100B CHIP C 10PF C453 CK73HB1H103K CHIP C 0.010UF C454,455 CK73GB1C225K CHIP C 2.2UF...
Page 23 NX-820H(G)/820H PARTS LIST TX-RX UNIT (X57-8240-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C605 CC73HCH1H101J CHIP C 100PF C762 CK73HB1H103K CHIP C 0.010UF C607 CC73HCH1H101J CHIP C...
Page 24 NX-820H(G)/820H PARTS LIST TX-RX UNIT (X57-8240-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation L92-0163-05 BEADS CORE L302 L40-5681-86 SMALL FIXED INDUCTOR(0.56UH) L92-0163-05 BEADS CORE L304 L40-5675-92 SMALL FIXED INDUCTOR(56NH)
Page 25 NX-820H(G)/820H PARTS LIST TX-RX UNIT (X57-8240-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R125 RK73FB2B821J CHIP R 1/8W RK73HB1J103J CHIP R 1/16W R128 RK73HB1J221J CHIP R 1/16W...
Page 26 NX-820H(G)/820H PARTS LIST TX-RX UNIT (X57-8240-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R249,250 RK73HB1J183J CHIP R 1/16W R429 RK73HB1J000J CHIP R 1/16W R255-257 RK73HB1J104J CHIP R...
Page 27 NX-820H(G)/820H PARTS LIST TX-RX UNIT (X57-8240-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R620 RK73HB1J103J CHIP R 1/16W R748,749 RK73HB1J104J CHIP R 100K 1/16W R621-624 RK73HB1J104J CHIP R...
Page 28 NX-820H(G)/820H PARTS LIST TX-RX UNIT (X57-8240-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation D106 DZ2J056(M) ZENER DIODE IC705 BU7242NUX MOS-IC D107 RKP351KW-1P2 DIODE IC711 BU7462NUX MOS-IC D108,109...
Page 29: Exploded View
NX-820H(G)/820H EXPLODED VIEW : N30-2605-48(M2.6x5) : N67-3008-48(M3x8) : N87-2608-48( 2.6X8) J501 J701 IC102 IC714 TX-RX unit Cx13 R358 (H type) (HG type) Display unit Caution label Model name plate Parts with the exploded numbers larger than 700 are not supplied.
Page 30: Packing
NX-820H(G)/820H PACKING 706 Pamphlet Protection bag 8 Instruction Manual (B62-2421-00) 18 Fuse (Blade type) x 2 47 Bracket (F52-0024-05) (J29-0726-03) 41 Packing Fixture 12 DC cord assy (H12-4346-12) 40 Packing Fixture (E30-7523-55) (H12-4345-12) 50 Screw set (N99-2039-05) 52 Microphone(KMC-35) (T91-0639-55)
Page 31: Trouble Shooting
NX-820H(G)/820H 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 32 NX-820H(G)/820H TROUBLE SHOOTING When a normal Checking the signal output from value is confirmed. the ASIC by software control When an abnormal value is confirmed. Points to be checked Normal voltage Remove R407. If the ASIC side is 0V, SBC R407 3.3V...
Page 33 TX-RX unit Information Frequency Range Original TX-RX For Service TX-RX Model Name [MHz] unit Number unit Number NX-820H(G) (GPS model) : K 450 - 520 X57-8240-10 X57-8240-14 NX-820H : K 450 - 520 X57-8240-11 X57-8240-15 NX-820H(G) (GPS model) : K2...
Page 34 Maintain the ESN data of the Trunking System KENWOOD ESN following the new ESN. Type : Kx When a new printed circuit board is used, the KENWOOD ESN The same number as the KENWOOD changes, as does the Transceiver Information display of the ESN label is written.
Page 35: Adjustment
NX-820H(G)/820H ADJUSTMENT ■ Key operation Controls “ ” not appears on the LCD display Function Display Power Volume Channel [ ]/[ ] Test channel up/down Channel No. switch Up/Down key Up/Down key Squelch level Push: Squelch level up Hold: Squelch off...
Page 36 NX-820H(G)/820H ADJUSTMENT • LED indicator Frequency and Signaling Red LED Lights during transmission. The transceiver has been adjusted for the frequencies Green LED Lights when there is carrier. shown in the following table. When required, readjust them following the adjustment procedure to obtain the frequencies you want in actual operation.
Page 37 NX-820H(G)/820H ADJUSTMENT • NXDN mode signaling Key operation Function RAN1 RAN1 Push Hold (1 second) None [ ]/[ ] Adjustment value up/down RAN1 Maximum deviation pattern 20Hz/2kHz (During transmis- sion in balance adjustment) None FSW+PN9 (PC test mode only) Wide/Narrow/Very narrow...
Page 38 NX-820H(G)/820H ADJUSTMENT Adjustment item supplement Adjustment Item Description The lock voltage of VCO (Receive) is adjusted. Receive Assist This item must be adjusted before all adjustment items for receiver section are adjusted. This item can be adjusted only in PC Test Mode.
Page 39 NX-820H(G)/820H ADJUSTMENT Adjustment item and Adjustment range NV (NXDN Very Adjusutment Panel Adjust item (Analog Wide) (Analog Narrow) (NXDN Narrow) Narrow) Order item tuning test Number Adjustment range 9 point ADJ Common ✓ Receive Assist Section 2 1~4096 9 point ADJ Common ✓...
Page 40 NX-820H(G)/820H ADJUSTMENT NV (NXDN Very Adjusutment Panel Adjust item (Analog Wide) (Analog Narrow) (NXDN Narrow) Narrow) Order item tuning test Number Adjustment range - *1 Receiver ✓ ✓ RSSI Reference Section 4 1~256 - *1 Receiver ✓ ✓ Open Squelch...
Page 41 NX-820H(G)/820H ADJUSTMENT ] hold Analog MAX Deviation Analog MAX Deviation Narrow Wide ADEV ADEV ] press 5 reference level Adjustments ] hold QT Deviation QT Deviation Narrow Wide ] press ] hold DQT Deviation DQT Deviation Wide Narrow ] press...
Page 42 NX-820H(G)/820H ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Speciﬁ cations Frequency Range 100 to 520MHz Modulation Frequency modulation and external modulation 1. Standard Signal Generator Output –127dBm/0.1µV to greater than –20dBm/22.4mV (SSG) When performing the Frequency adjustment, the following accuracy is necessary.
Page 43 NX-820H(G)/820H ADJUSTMENT Radio check Section Measurement Adjustment Speciﬁ cations/ Item Panel test mode PC test mode Test- Termi- Remarks Unit Unit Parts Method equipment 1. Frequency 1) CH-Sig : 1-1 1) Test Channel f. counter Check an inter- +/-0.25ppm check...
Page 44 NX-820H(G)/820H ADJUSTMENT Measurement Adjustment Speciﬁ cations/ Item Panel test mode PC test mode Test- Termi- Remarks Unit 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 Ext.SP...
Page 45 NX-820H(G)/820H ADJUSTMENT Measurement Adjustment Speciﬁ cations/ Panel test Item PC test mode Test- Ter- Remarks mode Unit Unit Parts Method equipment minal 4. Frequency  The Frequency 1) Adj item: [PC test mode] [PC test mode] adjustment can [Frequency] Press [Start] button of The value of “IF20”...
Page 46 NX-820H(G)/820H ADJUSTMENT Transmitter Section Measurement Adjustment Speciﬁ cations/ Item Panel test mode PC test mode Test- Termi- Remarks Unit Unit Parts Method equipment 1. High Transmit 1) Adj item: 1) TEST CH: Power [Panel tun- 48.0W ±2.0W power Limit [HLMT] Low, Low’, Center,...
Page 47 NX-820H(G)/820H ADJUSTMENT Measurement Adjustment Speciﬁ cations/ Item Panel test mode PC test mode Test- Termi- Remarks Unit Unit Parts Method equipment 2.High Transmit 1) Adj item: 1) TEST CH: Power [Panel 45.0W ±1.0W Power [HPWR] Low, Low’, Center, meter tuning 13.0A or less...
Page 48 NX-820H(G)/820H ADJUSTMENT Measurement Adjustment Speciﬁ cations/ Item Panel test mode PC test mode Test- Termi- Remarks Unit Unit Parts Method equipment 4. Maximum Adj item: 1) Adj item: [Maximum Deviation [Panel tun- Write ﬁ xed value 2995~3117Hz Deviation [NDEV] Deviation (NXDN...
Page 49 NX-820H(G)/820H ADJUSTMENT Measurement Adjustment Speciﬁ cations/ Item Panel test mode PC test mode Test- Termi- Remarks Unit Unit Parts Method equipment 　 Write ﬁ xed value “513” 2050~2150Hz 5. Maximum Adj item: 1) Adj item: [Maximum Deviation [Panel tun- for each adjustment...
Page 50 NX-820H(G)/820H ADJUSTMENT Measurement Adjustment Speciﬁ cations/ Item Panel test mode PC test mode Test- Termi- Remarks Unit Unit Parts Method equipment 7. DQT Devia- 1) Adj item:[DQT] 1) Adj item: [DQT Deviation [Panel tun- Write the value 0.35kHz±0.05kHz Adjust:[.] tion adjust...
Page 51 NX-820H(G)/820H ADJUSTMENT Measurement Adjustment Speciﬁ cations/ Item Panel test mode PC test mode Test- Termi- Remarks Unit Unit Parts Method equipment 10. Single Adj item: 1) Adj item: [Single Deviation [Panel tun- Write the value 1.50kHz±0.05kHz TONE Devia- [TONE] Tone Deviation...
Page 52 NX-820H(G)/820H ADJUSTMENT  3 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 53 NX-820H(G)/820H ADJUSTMENT Measurement Adjustment Speciﬁ cations/ Item Panel test mode PC test mode Test- Remarks Unit Terminal Unit Parts Method equipment This adjustment can 　　 2. Sensitivity 1 1) Adj item: [PC test Write the value as adjust [Sensitivity 1] AF VTVM Ext.SP...
Page 54 NX-820H(G)/820H ADJUSTMENT Measurement Adjustment Speciﬁ cations/ Item Panel test mode PC test mode Test- Remarks Unit Terminal Unit Parts Method equipment 4. RSSI reference 1) Adj item: 1) Adj item: [PC test [Panel tuning Note: adjust [RRSS] [RSSI Reference Ext.SP...
Page 55 NX-820H(G)/820H ADJUSTMENT Measurement Adjustment Speciﬁ cations/ Item Panel test mode PC test mode Test- Remarks Unit Terminal Unit Parts Method equipment 　 7.High RSSI at 1) Adj item: 1) Adj item: [High [Panel tuning Note: -80dBm adjust [HRSS] RSSI (Analog Ext.SP con-...
Page 56: Terminal Function
NX-820H(G)/820H TERMINAL FUNCTION Display unit (X54-3830-10) TX-RX unit (X57-8240-1x) Pin No. Name Function Pin No. Name Function CN1 (to TX-RX unit CN514) CN514 (to Disply unit CN1) Battery voltage DC supply Battery voltage DC supply Battery voltage DC supply Battery voltage DC supply SP–...
Page 57 NX-820H(G)/820H TERMINAL FUNCTION 8pin Modular Connector Speciﬁ cation Signal Description/port type Item and Condition Unit Note Name Type Digital CMOS output This parameter depends on Bat- Output Voltage tery voltage. Power Switched B output Output Current Ground CMOS input Digital (Pull Up : 5.0V/10k)
Page 58 NX-820H(G)/820H TERMINAL FUNCTION Signal Description Item and Condition Unit Note Name Type Output Level 0.28 Vp-p DETO FM detector output Coupling Capacitor  Allowable Load Analog Output Level 0.24 Vp-p RX Audio output Coupling Capacitor  Allowable Load Input Voltage Range 1.98-...
Page 59 NX-820H(G)/820H TERMINAL FUNCTION Signal Description Item and Condition Unit Note Name Type -0.5 FNC6 I/O Digital Programmable I/O VOH(Io=-1.5mA) VOL(Io=1.5mA) Output Voltage 5.25 50MC Power 5V DC Power supply Output Current Input Voltage Analog Horn alert signal input Input Current Rds (ON) m...
Page 60: Pc Board
NX-820H(G)/820H PC BOARD DISPLAY UNIT (X54-3830-10) Component side view (J79-0345-09) DISPLAY UNIT (X54-3830-10) Foil side view (J79-0345-09)
Page 61 NX-820H(G)/820H PC BOARD DISPLAY UNIT (X54-3830-10) Component side view (J79-0345-09) Ref. No. Address Component side Layer 1 Layer 2 Foil side J79-0345-09 DISPLAY UNIT (X54-3830-10) Foil side view (J79-0345-09) Ref. No. Address Component side Layer 1 Layer 2 Foil side...
Page 62: Tx-Rx Unit (X57-8240-1X)
NX-820H(G)/820H PC BOARD TX-RX UNIT (X57-8240-1X) Component side view (J79-0344-09) J701 J501 CN804 C815 L806 C816 CN720 R821 R641 R643 F501 CN802 IC801 R637 R835 R844 R674 C660 R639 R673 R638 CN803 C646 C645 D601 A801 Q504 C633 C403 C422...
Page 63 NX-820H(G)/820H PC BOARD TX-RX UNIT (X57-8240-1X) Component side view (J79-0344-09) Ref. No. Address Ref. No. Address Q703 Q704 IC103 Q705 IC201 Q706 IC303 Q708 IC102 IC402 Q709 IC404 IC409 D101 IC509 D102 IC511 D111 IC512 D201 IC515 D202 IC701 D203...
Page 64 NX-820H(G)/820H PC BOARD TX-RX UNIT (X57-8240-1X) Foil side view (J79-0344-09) Ref. No. Address Ref. No. Address Q418 IC301 Q501 IC304 Q502 IC401 Q503 R171 L114 IC405 IC406 R139 IC407 R140 IC408 IC501 IC502 C194 IC503 IC504 R148 IC506 C158 R142...
Page 65 NX-820H(G)/820H PC BOARD TX-RX UNIT (X57-8240-1X) Foil side view (J79-0344-09) C632 Q502 R822 D705 D706 R667 R405 R406 C413 C788 C471 Q403 Q401 C409 C430 C434 C119 L106 R188 C433 C628 C629 R103 C118 IC516 C437 C457 R425 C438 R438...
Page 66: Interconnection Diagram
NX-820H(G)/820H INTERCONNECTION DIAGRAM OUT1 POWERGND OUT2 FILTER PREGND RFINPUT GATEBIAS DRAINBIAS RFOUTPUT 1-42 B38-0936-05...
Page 67: Schematic Diagram
NX-820H(G)/820H SCHEMATIC DIAGRAM TX-RX UNIT(X57-8240-1X) R:13.6V C N 4 2 3 DC/DC Converter(50M) T(45W):13.0V IC405 LT1616ES6-PBF 13.6V BATTERY C N 4 2 2 DC/DC Converter(50M) SHDN 5.02V D 4 0 7 L404 R B 5 2 0 S M - 3 0...
Page 68 NX-820H(G)/820H SCHEMATIC DIAGRAM TX-RX UNIT (X57-8240-1X) FSX0 FSX0 B-BUS PLL_MOD CLKX0 CLKX0 X2/CLKIN X2/CLKIN A-BUS A-BUS D-BUS D-BUS C-BUS C-BUS R526 33MDSP 100k CP507 100kX4 CN541 CN542 CP513 100kX4 DGND CP514 C533 100kX2 15MDSP 33MDSP CN502 CLKoUT HOST_RDY D[15] CN503...
Page 69 NX-820H(G)/820H SCHEMATIC DIAGRAM TX-RX UNIT (X57-8240-1X) FSX0 B-BUS B-BUS (MCLK) CLKX0 3.3V 18.432MHz X2/CLKIN FSX0 A-BUS CLKX0 D-BUS IC5 0 6 C-BUS R5 5 8 L 5 0 6 C542 0.01u INHN SM5 0 2 3 CNDH-G R555 Buffer AMP(Clock)
Page 70 NX-820H(G)/820H SCHEMATIC DIAGRAM TX-RX UNIT (X57-8240-1X) B-BUS B-BUS FSX0 CLKX0 I C5 0 8 X 501 18.423MHz TC7 SH0 8 FU-F L7 7- 3015- 05 R568 oUTPUT SCK1 R569 R567 oUTY oUTY C543 AND Gate AND Gate CN523 I C3 0 1 0.1u...
Page 71 NX-820H(G)/820H SCHEMATIC DIAGRAM TX-RX UNIT (X57-8240-1X) X57-824X-XX R781 0-10,0-11 NX-820H(G)/820H K 0-12,0-13 NX-820H(G)/820H B-BUS D703,704 Q 7 0 4 D703 AF Detector B-BUS 2SC4738(GR)F DA3S101F R775 Q703,704 I C7 1 4 5.6k MIC AGC 1.44V 1.44V R777 1.44V 1.44V Bias...
Page 72 C823 C824 C825 C826 L802 R561 R802 R835 R839 R842 R843 R844 IC801 D801 D802 L801 L805 L806 0-10 ,0-12 NX-820H(G) K,K2 0-11 ,0-13 NX-820H K,K2 TX-RX UNIT (X57-8240-1X) B-BUS B-BUS ✽ 1 C N 8 0 3 CN8 0 2...
Page 73 NX-820H(G)/820H SCHEMATIC DIAGRAM TX-RX UNIT (X57-8240-1X) THP1 THP1 B-BUS C 31 47 p TEMP 0.01u 0.01u GND1 R 19 R 2 0 R2 4 NC_1 CPout 39 0 GND2 oUTPUT VCCcp NC_2 NC_3 LD/PS PLL System C 20 R 7 2...
Page 74 C218 C220 C221 C222 C224 C225 C226 C230 C231 C232 L204 L205 L206 L207 L208 L209 L211 L214 0-10,0-11 NX-820H(G)/820H K 270p 470p 0.5p 180n 180n L34-4607-15 L34-4608-15 180n 180n 180n ERTJOEV104H 0-12,0-13 NX-820H(G)/820H 150p 270p 220n 220n L34-4608-15 L34-4609-15...
Page 75 L228 R102 R103 R104 R130 R184 R185 R188 R291 R292 X57-824X-XX C145 C148 C149 C150 CN13 D102 0-10,0-11 NX-820H(G)/820H K 100p E23-1278-05 0-12,0-13 NX-820H(G)/820H 220p 470p 100p 470p 100p 0.1u 100p 470p DA3S101F 2.7n TX-RX UNIT (X57-8240-1X) THP1 2.6V:25 TX Power Module...
Page 76 NX-820H(G)/820H SCHEMATIC DIAGRAM X57-824X-XX C183 C184 C197 0-10,0-11 NX-820H(G)/820H K 6.0p 0-12,0-13 NX-820H(G)/820H TX-RX UNIT (X57-8240-1X) ✽ COUP PL ER ✽ For war d Po we r L 117 R171 L1 16 R eve r se Po we r CN514...
Page 77 NX-820H(G)/820H SCHEMATIC DIAGRAM DISPLAY UNIT (X54-3830-10) D 11-21,24 LCD BACKLIGHT R 3 4 2.07V D2 1 R 3 6 R 2 9 2 2 0 2 7 0 R2 8 1 2 0 B30-2337-05 KT C4 0 7 5 E( Y, GR )
Page 78: Block Diagram
NX-820H(G)/820H BLOCK DIAGRAM TX-RX UNIT(X57-8240-1X) X501 L77-3015-05 IC506 SM5023CNDH-G VCTCXO BUFF 18.432MHz /PCS_DSP PSCK_DSP PLL MOD SKY72310-362 IC503 IC501 16.8MHz TCXO Flash IC502 SRAM SD01 PLL MOD /DRST,/HDS2,/HRDY, IC508 /SYMTIM,/DINT,FSDET, /PCS_DSP TC7SH08FU-F /HINT,/DWUP /PCS_RF /PCS SCK1 MCDIAF,/MCSCKAF,/MCCSAF, P_SCK1 MCDOAF,MCDICN,/MCCSXCN, HOST_RDY,DSP_ST,MCSCKCN...
Page 79 NX-820H(G)/820H BLOCK DIAGRAM Q4 2SC5383-T111 D14 DA2S101 Lippple 50CS 450-520 MHz(K) Filter Q8 EM6M1 400-470 MHz(K2) Q9 SSM3J15FS TX: 450 - 520MHz(K) /T_R 400 - 470MHz(K2) Q101 Q102 IC102 D110,111 L407CDB D16,17 2SC5108(Y)F 2SC3356-A 2SC3357-A RA60H40471101 SKY72310-362 RKS151KJ*2 D107 RKP351KW-1P2...
Page 80 NX-820H(G)/820H BLOCK DIAGRAM 30pin FLAT CABLE Connector (TO TX-RX UNIT) 8pin MODULAR JACK KMI1 KMI2 KMI3...
Page 81: Level Diagram
NX-820H(G)/820H LEVEL DIAGRAM Receiver Section RF (Center Frequency) IF1 (49.95MHz) IF2 (450kHz) –119.0dBm –119.5dBm –114.0dBm –121.0dBm –107.5dBm -63.5dBm IF Amp FM IC ASIC Mixer C296 C263 C216 C361 C347 C343 Q201 IC303 IC507 Q202 Q305 AF (1kHz) 186.2mVrms 186.2mVrms 226.1mVrms 101.2mVrms...
Page 82: Optional Accessories
NX-820H(G)/820H OPTIONAL ACCESSORIES KRA-40 (GPS ACTIVE ANTENNA) Speciﬁ cations Supply Voltage ............3.0±0.3V Current Consumption ...........Typ. 19mA Center Frequency ..........1575.42MHz Gain ..........30±7dBi (Elevation : 90°) ............23±7dBi (Elevation : 10°) Output Impedance ............50 External View...
Page 83 NX-820H(G)/820H MEMO...
Page 84: Specifications
Analog @12.5kHz: 45dB Modulation ..........16K0F3E, 14K4F1D, 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 85 NX-820H(G)/820H NX-820H(G)/820H PC BOARD PC BOARD DISPLAY UNIT (X54-3830-10) Component side view (J79-0345-09) DISPLAY UNIT (X54-3830-10) Component side view (J79-0345-09) Ref. No. Address Component side Layer 1 Layer 2 Foil side J79-0345-09 DISPLAY UNIT (X54-3830-10) Foil side view (J79-0345-09) DISPLAY UNIT (X54-3830-10) Foil side view (J79-0345-09) Ref.
Page 86 NX-820H(G)/820H NX-820H(G)/820H PC BOARD PC BOARD TX-RX UNIT (X57-8240-1X) TX-RX UNIT (X57-8240-1X) Component side view (J79-0344-09) Component side view (J79-0344-09) Ref. No. Address Ref. No. Address Q703 J701 J501 Q704 IC103 Q705 IC201 Q706 IC303 Q708 IC102 IC402 Q709 CN804...
Page 87 NX-820H(G)/820H NX-820H(G)/820H PC BOARD PC BOARD TX-RX UNIT (X57-8240-1X) TX-RX UNIT (X57-8240-1X) Foil side view (J79-0344-09) Foil side view (J79-0344-09) C632 Ref. No. Address Ref. No. Address Q418 IC301 Q501 IC304 Q502 Q502 IC401 Q503 R171 L114 IC405 IC406 R139...
Page 88 C232 L204 L205 L206 L207 L208 L209 L211 L214 X57-824X-XX C183 C184 C197 0-10,0-11 X57-824X-XX NX-820H(G)/820H K R781 0-10 ,0-12 X57-823X-XX NX-820H(G) K,K2 A801 CN801 C809 C814 C815 C816 C820 C821 C822 C823 C824 C825 C826 D801 D802 L801 L802...
Page 89 TX-RX UNIT(X57-8240-1X) Q4 2SC5383-T111 D14 DA2S101 X501 Lippple L77-3015-05 50CS 450-520 MHz(K) IC506 Filter Q8 EM6M1 400-470 MHz(K2) SM5023CNDH-G Q9 SSM3J15FS VCTCXO TX: 450 - 520MHz(K) BUFF 18.432MHz /T_R 400 - 470MHz(K2) /PCS_DSP Q101 Q102 IC102 D110,111 L407CDB PSCK_DSP D16,17 2SC5108(Y)F 2SC3356-A 2SC3357-A...

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