Kenwood NX-800H Service Manual
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Kenwood NX-800H Service Manual

Kenwood NX-800H Service Manual

Uhf digital transceiver
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Download this manual See also: Service Manual, Instruction Manual
UHF DIGITAL TRANSCEIVER
NX-800H
SERVICE MANUAL
SUPPLEMENT
This NX-800H (K3 version) service manual contains a number of sections which differ from the service manual (B51-8823-00)
for NX-800/800H (K version). For items other than those in this NX-800H (K3 version) service manual, please refer to the ser-
vice manual (B51-8823-00) for NX-800/800H (K version).
Metallic cabinet
(A01-2194-11)
Modular jack
(E58-0522-05)
RF coaxial receptacle (M)
(E04-0167-15)
GENERAL .....................................................2
SYSTEM SET-UP .........................................4
REALIGNMENT ...........................................5
CIRCUIT DESCRIPTION ..............................7
PARTS LIST .................................................8
EXPLODED VIEW ......................................20
ADJUSTMENT ..........................................21
DISPLAY UNIT (X54-3680-10) ...............40
RoHS
This product complies with the
K3 version
CONTENTS
directive for the European market.
© 2009-12 PRINTED IN JA PAN
B51-8897-00 ( N ) 204
Key top
Panel assy
(K29-9401-03)
(A62-1162-12)
Packing (Phone jack)
(G53-1616-03)
Packing (D-sub outer)
(G53-1626-03)
DC cord (Pig tail)
(E30-7520-25)
INTERCONNECTION DIAGRAM ..............47
SCHEMATIC DIAGRAM ............................48
LEVEL DIAGRAM ......................................66
BLOCK DIAGRAM .....................................68
SPECIFICATIONS ......................................71
This product uses Lead Free solder.

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  • Page 1: Table Of Contents

    This NX-800H (K3 version) service manual contains a number of sections which differ from the service manual (B51-8823-00) for NX-800/800H (K version). For items other than those in this NX-800H (K3 version) service manual, please refer to the ser- vice manual (B51-8823-00) for NX-800/800H (K version).

  • Page 2: General

    Neither is any liability assumed for dam- the fi rmware under the license of Digital Voice Systems, Inc. ages resulting from the use of the information contained herein. Kenwood reserves the right to make changes to any products herein at any time for improvement purposes. GENERAL...
  • Page 3 Control station. The antenna system selection depends on many factors and is beyond the scope of this manual. Power input Your KENWOOD dealer can help you select an antenna sys- connector tem that will best serve your particular needs. 4-2. Radio location...

  • Page 4: System Set-Up

    NX-800H SYSTEM SET-UP Merchandise received Frequency range RF power Type Choose the type of transceiver 380.0~400.0MHz Are you using KRK-10 the remote kit? (Option) Are you using KCT-46 the ignition sense cable? (Option) See page 5. Transceiver programming A personal computer, programming interface (KPG-46/46A), and programming software (KPG-111D) are required for programming.

  • Page 5: Realignment

    NX-800H REALIGNMENT 1. Modes 5. PC Mode 5-1. Preface User mode The transceiver is programmed by using a personal com- puter, programming interface (KPG-46/46A) and program- Panel test mode Panel tuning mode ming software (KPG-111D: ver. 1.80 or later). The programming software can be used with a PC. Fig- ure 1 shows the setup of a PC for programming.

  • Page 6: Clone Mode

    NX-800H REALIGNMENT 5-3. KPG-46/KPG-46A description 7. If writing ends successfully, the checksum is calculated and a result is displayed. (PC programming interface cable: Option) 8. If you want to continue programming other transceivers, The KPG-46/46A is required to interface the transceiver repeat steps 4 to 7.

  • Page 7: Circuit Description

    CIRCUIT DESCRIPTION 1. Overview 2. Frequency Confi guration NX-800H (K3) is a UHF Mobile transceiver designed to The receiver is a double-conversion super heterodyne operate in the frequency range of 380 to 400MHz (in user using first intermediate frequency (IF) of 58.05MHz and mode).

  • Page 8: Parts List

    NX-800H 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. ne sont pas fournis.
  • Page 9 NX-800H PARTS LIST DISPLAY UNIT (X54-3680-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C966,967 CK73HB1H102K CHIP C 1000PF R953 RK73GB2A271J CHIP R 1/10W R954 RK73GB2A470J CHIP R...
  • Page 10 NX-800H PARTS LIST TX-RX UNIT (X57-7750-18) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation CK73HB1H471K CHIP C 470PF TX-RX UNIT (X57-7750-18) CC73HCH1H100B CHIP C 10PF CK73HB0J105K CHIP C 1.0UF...
  • Page 11 NX-800H PARTS LIST TX-RX UNIT (X57-7750-18) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C194 CK73HB1H471K CHIP C 470PF C292 CK73HB1H471K CHIP C 470PF C201 CK73HB1E103K CHIP C 0.010UF...
  • Page 12 NX-800H PARTS LIST TX-RX UNIT (X57-7750-18) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C435 CK73FB1A106K CHIP C 10UF C551 CK73HB1E103K CHIP C 0.010UF C436 CS77BA1A100M CHIP TNTL...
  • Page 13 NX-800H PARTS LIST TX-RX UNIT (X57-7750-18) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C736 CC73HCH1H101J CHIP C 100PF C922,923 CK73HB1H102K CHIP C 1000PF C737 CK73HB1A104K CHIP C 0.10UF...
  • Page 14 NX-800H PARTS LIST TX-RX UNIT (X57-7750-18) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation L208 L92-0138-05 CHIP FERRITE RK73HB1J271J CHIP R 1/16W L209 L40-3975-92 SMALL FIXED INDUCTOR (39NH)
  • Page 15 NX-800H PARTS LIST TX-RX UNIT (X57-7750-18) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R140 RK73HB1J104J CHIP R 100K 1/16W R265 RK73HB1J103J CHIP R 1/16W R141 RK73HB1J124J CHIP R...
  • Page 16 NX-800H PARTS LIST TX-RX UNIT (X57-7750-18) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R410 RK73HB1J684J CHIP R 680K 1/16W R545 RK73HB1J000J CHIP R 1/16W R411 RK73HB1J104J CHIP R...
  • Page 17 NX-800H PARTS LIST TX-RX UNIT (X57-7750-18) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R652 RK73HB1J104J CHIP R 100K 1/16W R755 RK73HB1J103J CHIP R 1/16W R654 RK73GB2A000J CHIP R...
  • Page 18 NX-800H PARTS LIST TX-RX UNIT (X57-7750-18) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R827 RK73HB1J332J CHIP R 3.3K 1/16W D909 1SS355 DIODE R828 RK73HB1J000J CHIP R 1/16W...
  • Page 19 NX-800H PARTS LIST TX-RX UNIT (X57-7750-18) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation SSM6L05FU-F SSM3J05FU-F Q9,10 2SC5636 TRANSISTOR 2SK1215-E(E) Q101 2SC5108(Y)F TRANSISTOR Q102 2SC5455-A TRANSISTOR Q105 RT1N141U-T111...

  • Page 20: Exploded View

    NX-800H EXPLODED VIEW : N09-2292-05 M3 x 8 : N67-3008-48 M2.6 x 6 (Br-Tap) : N87-2606-43 M2.6 x 8 (Br-Tap) : N87-2608-48 IC715 IC403 IC102 TX-RX unit A/2 (X57-) TX-RX unit B/2 (X57-) Display unit (X54-) Parts with the exploded numbers larger than 700 are not supplied.

  • Page 21: Adjustment

    NX-800H ADJUSTMENT Controls “FNC” not appears on the sub LCD display Function Display Power switch Microphone key Volume Up/Down key Channel Up/Down key [PTT] Transmit Use as the DTMF keypad. [0] to [9] If a key is pressed during and [A]...
  • Page 22 NX-800H ADJUSTMENT ■ Frequency and Signaling Panel Tuning Mode The transceiver has been adjusted for the frequencies ■ Preparations for tuning the transceiver shown in the following table. When required, readjust them Before attempting to tune the transceiver, connect the following the adjustment procedure to obtain the frequen- unit to a suitable power supply.
  • Page 23 NX-800H ADJUSTMENT ■ 5 reference level adjustments frequency Tuning point RX (MHz) TX (MHz) 335.05000 335.10000 Note: Low’ 347.55000 347.60000 Although the frequency range of this transceiver is 380 to 400MHz, the circuit and adjustments are designed under Center 365.05000 365.10000...
  • Page 24 NX-800H ADJUSTMENT Adjustment Item Description RSSI display level “ “ is adjusted. Low RSSI Both “Low RSSI” and “High RSSI” must be adjusted. High RSSI (The curve data of RSSI level is applied.) Tight Squelch The squelch level at level “9” is adjusted.
  • Page 25 NX-800H ADJUSTMENT Aw (Analog An (Analog Nn (NXDN Nv (NXDN Adjusutment Main LCD Very Narrow) Adjust item Wide) Narrow) Narrow) Order Sub-LCD display item display Number Adjustment range (RSSI measurement Receive Sensitivity 1 SENS1 value) Section 2 1~256 (RSSI measurement...
  • Page 26 NX-800H ADJUSTMENT [■] [■] Maximum Deviation (Analog) Maximum Deviation (Analog) Narrow Wide ADEV ADEV ] press ] hold 5 reference level Adjustments [■] [■] QT Deviation QT Deviation Narrow Wide ] press ] hold [■] [■] DQT Deviation DQT Deviation...
  • Page 27 NX-800H ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifi cations Frequency Range 300 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 28 NX-800H 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...
  • Page 29 NX-800H 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...
  • Page 30 NX-800H ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 5. Frequency * The Frequency 1) Adj item: [PC test mode] [PC test mode] adjust adjustment can be...
  • Page 31 NX-800H ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 2. Low 1) Adj item: [LOLMT] 1) Adj item: [Low Trans- Power [Panel 25.0W ±1.0W Transmit Adjust: [✳✳✳✳]...
  • Page 32 NX-800H ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 5. Balance 1) Adj item: [BAL] 1) Adj item: [Balance] Deviation [Panel The Deviation of 2kHz Tone deviation adjust *2 Adjust: [✳✳✳]...
  • Page 33 NX-800H ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment [Wide] 1) Adj item: [Aw ADEV] 1) Adj item: [Maximum Deviation [Panel Write the same 4150~4250Hz Adjust: [✳✳✳✳]...
  • Page 34 NX-800H ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 10. LTR 1) Adj item: [An LTR] 1) Adj item: [LTR Deviation [Panel Write the value as 0.70~0.80kHz...
  • Page 35 NX-800H ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment [Wide] 1) Adj item: [Aw MSK] 1) Adj item: [MSK Deviation [Panel Write the value as 2.95~3.05kHz Adjust: [✳✳✳✳]...
  • Page 36 NX-800H 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 Volume Up/Down 2.83V±0.3V setting 1) CH-Sig: 1-1 Channel: 1 Ext.SP...
  • Page 37 NX-800H ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment [NXDN 1) Adj item: [Nv RRSSI] 1) Adj item: [RSSI Ref- [Panel [Panel tuning mode] Adjust with the ana- Very Adjust: [✳✳✳]...
  • Page 38 NX-800H ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 6. Low RSSI 1) Adj item: [An LRSSI] 1) Adj item: [Low [Panel tuning mode] at –118dBm Adjust: [✳✳✳]...
  • Page 39 NX-800H ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment [Analog 1) Adj item: [Aw HRSSI] 1) Adj item: [High [Panel tuning mode] Wide] Adjust: [✳✳✳] RSSI (Wide)] Ext.SP...

  • Page 40: Pc Board

    NX-800H PC BOARD DISPLAY UNIT (X54-3680-10) Component side view (J79-0157-39) LEFT D929 D914 C922 R922 D935 DM/KVL HK/RXD LEFT DOWN PTT/TXD BLC/AFO DISPLAY UNIT (X54-3680-10) Foil side view (J79-0157-39) CP909 R907 IC905 R963 D904 R952 R935 C927 C948 CP917 IC901...
  • Page 41 NX-800H PC BOARD DISPLAY UNIT (X54-3680-10) Component side view (J79-0157-39) Ref. No. Address Ref. No. Address R988 R990 Q913 D924 R976 R989 R960 Q913 R991 C958 D908 D925 RIGHT D911 D926 D912 D927 D936 D914 D928 D915 D929 D916 D930...

  • Page 42: Tx-Rx Unit (X57-7750-18) (A/2)

    NX-800H PC BOARD TX-RX UNIT (X57-7750-18) (A/2) Component side view (J79-0208-19 A/2) J701 EXT. SP Q403 R401 C480 CN705 C805 IC715 R826 D408 C820 C132 L106 C131 L401 C128 C123 IC403 L402 R129 L403 R125 D404 C422 C421 F401 C419...
  • Page 43 NX-800H PC BOARD TX-RX UNIT (X57-7750-18) (A/2) Component side view (J79-0208-19 A/2) Ref. No. Address Ref. No. Address Q202 R152 Q212 Q403 IC102 C190 Q405 Q406 IC101 Q411 C189 IC102 Q501 IC103 Q709 IC201 C174 IC202 TH102 C194 IC203 D102...
  • Page 44 NX-800H PC BOARD TX-RX UNIT (X57-7750-18) (A/2) Foil side view (J79-0208-19 A/2) Ref. No. Address Ref. No. Address Ref. No. Address IC204 11F IC401 7M IC402 L115 IC404 IC405 IC408 5M Q101 C179 IC409 Q102 IC410 12J Q203 D110 R151...
  • Page 45 NX-800H PC BOARD TX-RX UNIT (X57-7750-18) (A/2) Foil side view (J79-0208-19 A/2) C811 C810 R410 D406 D401 Q401 C479 Q402 C475 R825 L405 C445 C801 C446 Q404 C802 C415 D409 D407 C468 R430 Q414 C443 C804 C454 IC405 C441 C803...

  • Page 46: Tx-Rx Unit (X57-7750-18) (B/2)

    NX-800H PC BOARD TX-RX UNIT (X57-7750-18) (B/2) Component side view (J79-0208-19 B/2) C905 C906 C904 Component side D906 Layer 1 J79-0208-19 B/2 C903 C915 Layer 2 C902 Layer 3 Layer 4 Layer 5 Ref. No. Address Layer 6 D905 CN901...

  • Page 47: Interconnection Diagram

    NX-800H INTERCONNECTION DIAGRAM...

  • Page 48: Schematic Diagram

    NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) R : 13.57V T : 13.09V L401 L402 CN401 L403 IC405 LT1616ES6-PBF R : 13.57V T : 13.07V SHDN 5.01V L404 D409 CN402 BooST 1SS388F SURGE REVERSE ABSORPTION PROTECTION L405 22uH IC405,D407,409 DC/DC...
  • Page 49 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) 4.95V 1.44V 0.92V 2SC5636 BUFFER AMP (PLL FIN) BYPASS DIODE DA221 FC-R : 7.08V RIPPLE FC-T : 6.61V LMC7101BIM5 FILTER OUTPUT 14.34V 13.72V 2SC5383-T111 14.30V INPUT+ INPUT- 470k BUFFER AMP (VCO TUNE) VCO TUNE 3.29V...
  • Page 50 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) R : 3.21V T : 0V D3,7,9,10 220n FREQUENCY 0.74V RX VCO CONTROL 150k 150p 35.5n 0.5p 1SV282-F 2SK508NV(K52) 3.94V 2SC5636 BUFFER AMP (VCO) R : 0V T : 3.47V R153 D4,8,11,12 220n...
  • Page 51 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) BUFFER AMP R : 2.14V R : 0V (RF) T : 4.26V T : 4.94V PRE-DRIVE AMP 2SC5636 1.79V D101 R158 R160 C101 R103 C104 R106 C105 C109 470p 470p 470p HVC131 RF DRIVE AMP...
  • Page 52 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) IC102 RA55H3340M131 ANTENNA SWITCH D103 L407CDB C186 L112 L113 L114 120p D104 2.5T 2.5T 2.5T R126 R152 C121 2p L407CDB L104 R121 R127 C136 470p R : 0V T : 1.59V FC-H : 3.63V FC-L : 3.40V...
  • Page 53 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) X2_CLKIN /BER_EN 1.48V 3.31V 15M_1 33M_1 R532 100 MCDIAF R533 0 /MCCSAF DVSS7 R536 0 BCLKX1 MCSCKAF CVSS9 CVSS8 C503 DVDD5 R537 0 0.1u FSDET C518 1u CVDD5 INT3 INT3 INT2 INT1 /DINT...
  • Page 54 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) X2_CLKIN X2_CLKIN 3.31V C515 L522 VCC1 VSS1 3.31V DQ11 IC503 L501 SRAM DQ13 IC501 DQ15 FLASH ROM VSS1 VSS2 R504 100k IC504 RV5C386A 3.31V R545 L523 DELAY 33BU 3.31V RESET (MCU) 32KOUT IC505...
  • Page 55 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) R572 22 X2_CLKIN X2_CLKIN ASQDET R720 R577 100k R569 XTALI XTALo C623 0.01u DSPCK /RINT /HINT USRCKI ADD0 ADD1 ADD2 ADD3 ADD4 ADD5 ADD6 ADD7 ADD8 ADD9 ADD10 ADD11 ADD12 ADD13 ADD14 ADD15...
  • Page 56 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) X2_CLKIN X2_CLKIN ASQDET R603 3.29V DGND3 DGND2 DGND1 C547 0.1u 33M_4 DVDIo7 C548 0.1u DVDIo6 C549 0.1u DVDIo5 C550 0.1u DVDIo4 C551 0.01u DVDIo3 C552 1u DVDIo2 DVDIo1 C554 0.1u 3.31V DVDD10 C555 0.1u DVDD9 C556 0.1u...
  • Page 57 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) X2_CLKIN R915 33M_4 IC511 TC7SH08FU-F 3.31V 3.31V D503 IC508 oUTY 1SS416 SM5023CNDH-G X502 18.432MHz REVERSW C530 CURRENT (PCS RF/HD2) 0.01u PREVENTION oUTPUT (PCS RF) R594 INHN BUFFER AMP (18.432MHz) C531 0.1u BSHIFT L518...
  • Page 58 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) OPT10 3.28V BUFFER AMP (2nd IF DET) 2nd IF BUFF 3.28V C729 0.1u R : 0V 1.63V T : 1.63V IC706 TC75W51FK(F) MIC AA 1.63V C707 R716 0.1u R725 R722 1.65V R748 R753...
  • Page 59 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) OPT10 OPT10 SQ VOLTAGE CONTROL D702 R755 HSC119 R729 100k ASQ DET C722 3.28V NOISE DETECTOR (SQ) D703 R760 RB706F-40 IC705 1.5k BRF/BUFFER TC75W51FK(F) C740 AMP (SQ) 4700p C734 ASQ BPF 0.01u R707...
  • Page 60 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) OPT10 /INAMT SDO0 SCK0 /EVCS C776 1.62V C777 1000p 3.28V 1.62V Q708 2SA1832(GR)F C799 0.1u OPT10 R818 OPT10SEL R836 R821 C789 4.7u C790 10u R822 C813 10u D706 D707 1.62V EMZ6.8N EMZ6.8N LINE...
  • Page 61 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) R825 C801 C802 R828 /INAMT R662 470k Q710 R823 DTC363EU R663 470k 4.7k MUTE Q709 /INT25P RT1N141U-T111 C591 0.01u LINE PROTECTION (AIO9) IC514 4.98V TC7WBD125AFK I2CCK I2CDT IC517 PCA9535RGE 4.98V AIO9 EXPANDER AIO8...
  • Page 62 NX-800H SCHEMATIC DIAGRAM TX-RX UNIT (X57-7750-18) (A/2) IC715 LA4425A AF POWER 13.54V 1.34V 6.38V CN705 R831 C810 TX-RX UNIT (X57-7750-18) (B/2): D-SUB25 470p D901 D903 D907 D911 J701 LINE LINE LINE LINE PROTECTION PROTECTION PROTECTION PROTECTION (BER CK) (AUXIO1) (AUXIO3) (AUXIO8) EXT.SP...
  • Page 63 NX-800H SCHEMATIC DIAGRAM DISPLAY UNIT (X54-3680-10) R924 R925 "PF4" VOL UP R922 CN902 CH UP "PF3" VOL DOWN R923 CH DOWN "PF2" "PF1" TX-RX UNIT (X57-7750-18) (A/2) CN597 CN901 D908,911,912 KEY MATRIX C580 100p 3.12V C581 POWER 1000p C582 1000p...
  • Page 64 NX-800H SCHEMATIC DIAGRAM DISPLAY UNIT (X54-3680-10) 8.00V 7.97V Q910 12A02CH TX/RX LED 7.27V BACK TX/RX LED (BUSY) LIGHT (TX) Q905 Q906 R :0V R : 5.00V D915-926 D927-936 RT1N141U RT1N141U T : 5.00V T : 0V -T111 -T111 BACK LIGHT...
  • Page 65 NX-800H SCHEMATIC DIAGRAM DISPLAY UNIT (X54-3680-10) CN905 -4.29V C956 0.01u 33C-2 C955 Q913 UPA672T-A R976 100p FLASH ROM IC913 29AL16D7KCCB 3.30V 3.30V /CS0 R900 VSS1 RESET /CS1 BUS BUFFER BUS BUFFER DQ10 RY/BY (A1-A2) (D0-D7) 3.30V R986 DQ11 RESET /CS3...

  • Page 66: Level Diagram

    NX-800H LEVEL DIAGRAM Receiver Section Radio Frequency 58.05MHz 450kHz –121.5dBm –104dBm –118dBm –120.5dBm –114.5dBm –112.5dBm –118.0dBm –72.0dBm RF AMP 1st MIX DBM IF AMP IF AMP FM SYSTEM IC D212,D213 D207~D210 XF202 CF203 Q210 IC204 Q205 Q204 IC202 Buff AMP...

  • Page 67: Level Diagram

    NX-800H LEVEL DIAGRAM Audio Frequency –82.0dBm –82.0dBm 186mVrms 226mVrms 226mVrms 96mVrms 4.00Vrms (EVOL) IF AMP (ASIC) (RXAF SMF) (RX SUM) VOL=20 (SP AMP) IC201 IC510 IC701 IC711 IC712 IC715 J701 AF VTVM AF level obtained when the AF output level is adjusted for 4.00V/4Ω...

  • Page 68: Block Diagram

    NX-800H BLOCK DIAGRAM TX-RX UNIT (X57-775) CN401 DCin F401 (13.6V) LM73CIMKX-0 F53-0328-05 CN402 TEMP DCDC I2CCK Converter I2CDT SENSOR ASSIST 33C 50C IC402 IC405 XC6204B332P1 XC6204B332P1 L77-3016-05 3.3V AVR IC408 Q405 VCTCXO TCXO_MOD BUFF BUFF XC6204B332M 2SA1955A-F 19.2MHz 3.3V AVR...
  • Page 69 NX-800H BLOCK DIAGRAM 150C Ripple Ripple 2SC5383-T111 FILTER FILTER 2SC5383-T111 /T_R T/R SW SSM6L05FU ASSIST BUFF 2SJ347F LMC7101BIM5 D103 L407CDB D104 L407CDB D101,205 PRE- D106 L7091CER HVC131 DRIVE DRIVE FINAL LOOP BUFF BUFF Q5,Q6 FILTER 380~400MHz IC102 2SK508NV(K52) Q101 Q102...
  • Page 70 NX-800H BLOCK DIAGRAM CN905 LCD Connector...

  • Page 71: Specifications

    FM Hum and Noise (Typ) ......Analog @25kHz: 50dB 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. KENWOOD reserves the right to change specifi cations without prior notice or obligation.
  • Page 72 Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Bp 58416 Villepinte, 95944 Roissy Ch De Gaulle Cedex Kwai Fong, N.T., Hong Kong KENWOOD House, Dwight Road, Watford, Herts., 1 Ang Mo Kio Street 63, Singapore 569110 WD18 9EB United Kingdom...

  • Page 73: Pc Board Display Unit (X54-3680-10)

    NX-800H NX-800H PC BOARD PC BOARD DISPLAY UNIT (X54-3680-10) Component side view (J79-0157-39) DISPLAY UNIT (X54-3680-10) Component side view (J79-0157-39) Ref. No. Address Ref. No. Address R988 R990 Q913 D924 R976 R989 R960 Q913 R991 C958 D908 D925 LEFT RIGHT...
  • Page 74 NX-800H NX-800H PC BOARD PC BOARD TX-RX UNIT (X57-7750-18) (A/2) TX-RX UNIT (X57-7750-18) (A/2) Component side view (J79-0208-19 A/2) Component side view (J79-0208-19 A/2) J701 EXT. SP Q403 R401 C480 Ref. No. Address Ref. No. Address Q202 R152 Q212 CN705...
  • Page 75 NX-800H NX-800H PC BOARD PC BOARD TX-RX UNIT (X57-7750-18) (A/2) TX-RX UNIT (X57-7750-18) (A/2) Foil side view (J79-0208-19 A/2) Foil side view (J79-0208-19 A/2) Ref. No. Address Ref. No. Address Ref. No. Address IC204 11F IC401 7M C811 C810 IC402...
  • Page 76 NX-800H PC BOARD TX-RX UNIT (X57-7750-18) (B/2) Component side view (J79-0208-19 B/2) C905 C906 C904 Component side D906 Layer 1 J79-0208-19 B/2 C903 C915 Layer 2 C902 Layer 3 Layer 4 Ref. No. Address Layer 5 Layer 6 D905 CN901...
  • Page 77 TX-RX UNIT (X57-7750-18) (A/2) R : 13.57V T : 13.09V R : 3.21V BUFFER AMP RA55H3340M131 IC102 ANTENNA X2_CLKIN X2_CLKIN X2_CLKIN X2_CLKIN R572 22 X2_CLKIN X2_CLKIN X2_CLKIN X2_CLKIN L401 T : 0V (RF) R : 2.14V T : 4.26V R : 0V T : 4.94V PRE-DRIVE AMP SWITCH...
  • Page 78 Radio Frequency 58.05MHz 450kHz Audio Frequency –121.5dBm –104dBm –118dBm –120.5dBm –114.5dBm –112.5dBm –118.0dBm –72.0dBm –82.0dBm –82.0dBm 186mVrms 226mVrms 226mVrms 96mVrms 4.00Vrms (EVOL) RF AMP 1st MIX DBM IF AMP IF AMP FM SYSTEM IC IF AMP D212,D213 D207~D210 XF202 CF203 (ASIC) (RXAF SMF) (RX SUM)
  • Page 79 TX-RX UNIT (X57-775) 150C Ripple Ripple FILTER 2SC5383-T111 FILTER 2SC5383-T111 CN401 DCin /T_R F401 (13.6V) LM73CIMKX-0 F53-0328-05 CN402 T/R SW DCDC I2CCK TEMP Converter I2CDT SENSOR SSM6L05FU ASSIST BUFF 33C 50C IC402 IC405 XC6204B332P1 2SJ347F XC6204B332P1 L77-3016-05 LMC7101BIM5 3.3V AVR D103 L407CDB IC408 Q405...

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