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

Uhf digital transceiver
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SERVICE MANUAL
SUPPLEMENT
This service manual has been revised due to the modification of the Mixer IC.
This service manual applies to products with B2801161 (except B2801431 to B2801544) or
subsequent serial number. Refer to the NX-700/700H service manual (B51-8822-00) for any
information which has not been covered in this service manual.
This product complies with the RoHS directive for the European market
B5B-7219-00
UHF DIGITAL TRANSCEIVER
NX-800, NX-800H
COPYRIGHT © 2015 JVC KENWOOD Corporation
KMC-36
(Option)
.
This product uses Lead Free solder.
No.RQ080
2015/11

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  • Page 1 Refer to the NX-700/700H service manual (B51-8822-00) for any information which has not been covered in this service manual. This product complies with the RoHS directive for the European market This product uses Lead Free solder. B5B-7219-00 No.RQ080 COPYRIGHT © 2015 JVC KENWOOD Corporation 2015/11...

  • Page 2: Table Of Contents

    ADJUSTMENT NX-800/800H (K,K2) Receiver Section .................. 20 NX-800H (K3) Receiver Section .................... 21 PC BOARD NX-800/800H (K,K2): TX-RX UNIT (X57-8900-XX, XC1-0990-10) ......... 22 NX-800H (K3): TX-RX UNIT (X57-8900-18) ................28 BLOCK DIAGRAM NX-800/800H (K,K2): TX-RX UNIT (X57-8900-XX, XC1-0990-10) ......... 34 NX-800H (K3): TX-RX UNIT (X57-8900-18) ................

  • Page 3: Parts List

    NX-800/800H PARTS LIST CAPACITORS 2 2 0 • Capacitor value CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc. 5 = Value...
  • Page 4 NX-800/800H PARTS LIST 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 : Europe Les articles non mentionnes dans le Parts No. ne sont pas fournis.
  • Page 5 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation CK73HBB1H471K CHIP C 470PF C136 CK73FB1H471K CHIP C 470PF CK73HBB1H471K CHIP C 470PF C138 CS77MA1A6R8M CHIP TNTL 6.8UF...
  • Page 6 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation C187 CM73F2H040C CHIP C 4.0PF C245 CK73HBB1H471K CHIP C 470PF C187 CM73F2H050C CHIP C 5.0PF...
  • Page 7 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation C296 CC73HCH1H060B CHIP C 6.0PF C343 CK73HBB1A104K CHIP C 0.1UF C296 CC73HCH1H070B CHIP C 7.0PF...
  • Page 8 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation C455 CK73HBB1E103K CHIP C 0.01UF C535 CS77BP0J100M CHIP TNTL 10UF 6.3WV C456 CK73HBB1E103K CHIP C 0.01UF...
  • Page 9 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation C591 CK73HBB1E103K CHIP C 0.01UF C719 CK73HBB1A104K CHIP C 0.1UF C592 CC73HCH1H101J CHIP C 100PF...
  • Page 10 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation C787 CK73FB1A106K CHIP C 10UF C920 CC73HCH1H101J CHIP C 100PF C788 CK73HBB1A104K CHIP C 0.1UF...
  • Page 11 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation HVC131 DIODE D906 DZ2J180(M) ZENER DIODE D907 MC2850 DIODE D101 HVC131 DIODE D908 MC2850 DIODE...
  • Page 12 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation IC701 TC75S51FE(F) MOS-IC LB73H0AV-003 CHIP FERRITE BEADS IC702 TC75W51FK(F) MOS-IC LB73H0AV-003 CHIP FERRITE BEADS IC703...
  • Page 13 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation L221 L41-2278-14 SMALL FIXED INDUCTOR(22NH) Q101 2SC5108F/Y/ TRANSISTOR L223 LR79Z0DD32N5J SMALL FIXED INDUCTOR(32.5NH) K,K2,HK2,HK Q102...
  • Page 14 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation RK73HB1J100J CHIP R J 1/16W RK73HB1J000J CHIP R J 1/16W RK73HB1J100J CHIP R J 1/16W...
  • Page 15 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation R148 RK73HB1J103J CHIP R J 1/16W R245 RK73HB1J154J CHIP R 150K J 1/16W R149 RK73HB1J104J...
  • Page 16 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation R323 RK73HB1J470J CHIP R J 1/16W R436 RK73HB1J000J CHIP R J 1/16W R324 RK73HB1J182J CHIP R 1.8K...
  • Page 17 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation R556 RK73HB1J104J CHIP R 100K J 1/16W R620 RK73HB1J102J CHIP R 1.0K J 1/16W R557...
  • Page 18 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation R687 RK73HB1J472J CHIP R 4.7K J 1/16W R756 RK73HB1J153J CHIP R J 1/16W R688 RK73HB1J472J CHIP R 4.7K...
  • Page 19 NX-800/800H PARTS LIST TX-RX UINT (X57-8900-XX) TX-RX UINT (XC1-0990-10) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description nation nation R810 RK73HB1J102J CHIP R 1.0K J 1/16W TH101 ERTJ0V104H THERMISTOR R812 RK73HB1J472J CHIP R 4.7K...

  • Page 20: Adjustment

    NX-800/800H ADJUSTMENT NX-800/800H(K,K2) Receiver Section Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel test mode PC test mode Unit Unit Parts Method Terminal equipment 1. AF level 1) Test Channel Volume Up/Down 2.83V±0.3V [Panel test mode] [Panel setting 1) CH-Sig: 1-1 Channel: 1 Ext.SP tuning knob to obtain...

  • Page 21: Nx-800H(K3) Receiver Section

    NX-800/800H ADJUSTMENT NX-800H(K3) Receiver Section Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel test mode PC test mode Unit Unit Parts Method Terminal equipment 1. AF level 1) Test Channel Volume Up/Down 2.83V±0.3V [Panel test mode] [Panel setting 1) CH-Sig: 1-1 Channel: 1 Ext.SP tuning knob to obtain...

  • Page 22: Nx-800/800H (K,K2): Tx-Rx Unit (X57-8900-Xx, Xc1-0990-10)

    NX-800/800H PC BOARD TX-RX UNIT (X57-8900-XX) (A/2) -10: K, -11: HK, -13: HK2 TX-RX UNIT (XC1-0990-10) (A/2) : K2 Component side view (J79-0239-29 A/2) J701 EXT. SP Q403 R401 C480 CN705 IC102 C805 IC715 R826 D408 C820 C132 L106 C131...
  • Page 23 NX-800/800H PC BOARD TX-RX UNIT (X57-8900-XX) (A/2) -10: K, -11: HK, -13: HK2 TX-RX UNIT (XC1-0990-10) (A/2) : K2 Component side view (J79-0239-29 A/2) Ref. No. Address Ref. No. Address Q209 R152 Q212 Q403 IC102 C190 Q405 Q406 Q411 IC101...
  • Page 24 NX-800/800H PC BOARD TX-RX UNIT (X57-8900-XX) (A/2) -10: K, -11: HK, -13: HK2 TX-RX UNIT (XC1-0990-10) (A/2) : K2 Foil side view (J79-0239-29 A/2) Ref. No. Address Ref. No. Address Ref. No. Address IC204 11F IC401 7M IC402 L115 IC404...
  • Page 25 NX-800/800H PC BOARD TX-RX UNIT (X57-8900-XX) (A/2) -10: K, -11: HK, -13: HK2 TX-RX UNIT (XC1-0990-10) (A/2) : K2 Foil side view (J79-0239-29 A/2) C811 C810 R410 D406 D401 Q401 C479 Q402 C475 R409 R825 C445 L405 C801 C446 Q404...
  • Page 26 NX-800/800H PC BOARD TX-RX UNIT (X57-8900-XX) (B/2) -10: K, -11: HK, -13: HK2 TX-RX UNIT (XC1-0990-10) (B/2) : K2 Component side view (J79-0239-29 B/2) C905 C906 C904 Component side D906 Layer 1 J79-0239-29 B/2 C903 C915 Layer 2 C902 Layer 3 Layer 4 Ref.
  • Page 27 MEMO...

  • Page 28: Pc Board

    NX-800H PC BOARD TX-RX UNIT (X57-8900-18) (A/2): HK3 Component side view (J79-0403-09 A/2) J701 EXT. SP Q403 R401 C480 CN705 IC102 C805 IC715 R826 D408 C820 C132 L106 C131 L401 C128 C123 IC403 L402 R129 C150 L403 R125 D404 C422 C421 F401 C419...
  • Page 29 NX-800H PC BOARD TX-RX UNIT (X57-8900-18) (A/2): HK3 Component side view (J79-0403-09 A/2) Ref. No. Address Ref. No. Address Q209 R152 Q212 Q403 IC102 C190 Q405 Q406 IC101 Q411 C189 IC102 Q501 IC103 Q709 IC202 C174 IC203 TH102 C194 IC207 D102 R161 C132...
  • Page 30 NX-800H PC BOARD TX-RX UNIT (X57-8900-18) (A/2): HK3 Foil side view (J79-0403-09 A/2) Ref. No. Address Ref. No. Address Ref. No. Address IC204 11F IC401 7M IC402 L115 IC404 IC405 Q101 IC408 5M Q102 D101 C179 IC409 Q203 D103 IC410 12J Q204 D104 D110...
  • Page 31 NX-800H PC BOARD TX-RX UNIT (X57-8900-18) (A/2): HK3 Foil side view (J79-0403-09 A/2) C811 C810 R410 D406 D401 Q401 C479 Q402 C475 R409 R825 L405 C445 C801 C446 Q404 C802 D409 D407 C468 C415 R430 C443 C804 C454 IC405 C441 C803 L404 C474...
  • Page 32 NX-800H PC BOARD TX-RX UNIT (X57-8900-18) (B/2): HK3 Component side view (J79-0403-09 B/2) C905 C906 C904 Component side D906 Layer 1 J79-0403-09 B/2 C903 C915 Layer 2 C902 Layer 3 Layer 4 Ref. No. Address Layer 5 Layer 6 D905 CN901 D906 Foil side...
  • Page 33 MEMO...

  • Page 34: Block Diagram

    NX-800/800H BLOCK DIAGRAM NX-800/800H (K,K2): TX-RX UNIT (X57-8900-XX, XC1-0990-10) (A/2) 150C 2SC5383-T111 Ripple FILTER CN401 DCin (13.6V) LM73CIMKX-0 F401 CN402 I2CCK TEMP I2CDT SENSOR ASSIST BUFF DC SW Q404 MTM981400BF LMC7101BIM5 8V AVR VCTCXO TCXO_MOD BUFF BUFF IC403 19.2MHz Detect...
  • Page 35 NX-800/800H BLOCK DIAGRAM 150C 2SC5383-T111 2SC5383-T111 Ripple Ripple FILTER FILTER /T_R K,HK: 450 - 520MHz T/R SW K2,HK2: 400 - 470MHz ASSIST BUFF SSM6L05FU-F K :RA30H4452M123 HK :RA55H4452M123 SSM3J05FU-F K2 :RA30H4047M123 LMC7101BIM5 HK2:RA55H4047M123 K/K2 :D104 HK/HK2:D103,D104 D101,205 PRE- L407CDB HVC131...

  • Page 36: Nx-800H (K3): Tx-Rx Unit (X57-8900-18)

    NX-800/800H BLOCK DIAGRAM NX-800H (K3): TX-RX UNIT (X57-8900-18) (A/2) 150C 2SC5383-T111 Ripple FILTER CN401 DCin (13.6V) LM73CIMKX-0 F401 CN402 I2CCK TEMP I2CDT SENSOR ASSIST BUFF DC SW Q404 MTM981400BF LMC7101BIM5 8V AVR VCTCXO TCXO_MOD BUFF BUFF IC403 19.2MHz Detect /BINT...
  • Page 37 NX-800/800H BLOCK DIAGRAM 150C 2SC5383-T111 2SC5383-T111 Ripple Ripple FILTER FILTER /T_R T/R SW 380 - 400MHz ASSIST BUFF SSM6L05FU-F SSM3J05FU-F LMC7101BIM5 RA55H3340M131 D103,D104 D101,205 PRE- L407CDB HVC131 DRIVE DRIVE FINAL SKY72310-362 LOOP BUFF BUFF FILTER Q5,Q6 2SK508NV(K52) Q101 Q102 IC102...
  • Page 38 Communications Systems Business Unit No.RQ080 Printed in Japan...
  • Page 39 NX-800/800H(K,K2) APPENDIX (SCHEMATIC DIAGRAM X57-8900-XX,XC1-0990-10) * IC102 TX-RX UNIT X57-8990-XX(-10(NX-800(K),-11(NX-800H(K),-13(NX-800H(K2)), XC1-0990-10(NX-800(K2)) (A/2) K,K2 :RA30H4047M123 HK,HK2:RA55H4047M123 4.95V R 4 3 C39 3 p C 3 4 1.44V FC-H:3.77V FC-L:3.34V (-92) (HK) 0.92V 2SC5636 FC-H:3.71V L117 FC-L:3.37V BUFFER AMP R:13.57V (PLL FIN) T:13.09V...
  • Page 40 NX-800H(K3) APPENDIX (SCHEMATIC DIAGRAM X57-8900-18) TX-RX UNIT (X57-8900-18) (A/2) 4.95V R4 3 IC102 C39 3p X57-775 0-18 0-19 RA55H3340M131 C3 4 C 4 9 1.44V 2-71 2-72 RA55H4047MA-123 (-92) 1 8 n 0.92V X57-791 0-10 RA55H3340M131 0-11 2SC5636 L117 BUFFER AMP (PLL FIN) Q5-6 L 3 5...
  • Page 41 NX-800/800H NX-800/800H PC BOARD PC BOARD TX-RX UNIT (X57-8900-XX) (A/2) -10: K, -11: HK, -13: HK2 TX-RX UNIT (X57-8900-XX) (A/2) -10: K, -11: HK, -13: HK2 TX-RX UNIT (XC1-0990-10) (A/2) : K2 TX-RX UNIT (XC1-0990-10) (A/2) : K2 Component side view (J79-0239-29 A/2)
  • Page 42 NX-800/800H NX-800/800H PC BOARD PC BOARD TX-RX UNIT (X57-8900-XX) (A/2) -10: K, -11: HK, -13: HK2 TX-RX UNIT (X57-8900-XX) (A/2) -10: K, -11: HK, -13: HK2 TX-RX UNIT (XC1-0990-10) (A/2) : K2 TX-RX UNIT (XC1-0990-10) (A/2) : K2 Foil side view (J79-0239-29 A/2) Foil side view (J79-0239-29 A/2) Ref.
  • Page 43 NX-800/800H PC BOARD TX-RX UNIT (X57-8900-XX) (B/2) -10: K, -11: HK, -13: HK2 TX-RX UNIT (XC1-0990-10) (B/2) : K2 Component side view (J79-0239-29 B/2) C905 C906 C904 Component side D906 Layer 1 J79-0239-29 B/2 C903 C915 Layer 2 C902 Layer 3 Layer 4 Ref.
  • Page 44 NX-800H NX-800H PC BOARD PC BOARD TX-RX UNIT (X57-8900-18) (A/2): HK3 TX-RX UNIT (X57-8900-18) (A/2): HK3 Component side view (J79-0403-09 A/2) Component side view (J79-0403-09 A/2) J701 EXT. SP Q403 R401 C480 Ref. No. Address Ref. No. Address Q209 R152 Q212 CN705 Q403...
  • Page 45 NX-800H NX-800H PC BOARD PC BOARD TX-RX UNIT (X57-8900-18) (A/2): HK3 TX-RX UNIT (X57-8900-18) (A/2): HK3 Foil side view (J79-0403-09 A/2) Foil side view (J79-0403-09 A/2) Ref. No. Address Ref. No. Address Ref. No. Address IC204 11F C811 C810 IC401 7M C811 C810 L115...
  • Page 46 NX-800H PC BOARD TX-RX UNIT (X57-8900-18) (B/2): HK3 Component side view (J79-0403-09 B/2) C905 C906 C904 Component side D906 Layer 1 J79-0403-09 B/2 C903 C915 Layer 2 C902 Layer 3 Layer 4 Ref. No. Address Layer 5 Layer 6 D905 CN901 D906 Foil side...
  • Page 47 NX-800/800H (K,K2): TX-RX UNIT (X57-8900-XX, XC1-0990-10) (A/2) 150C 2SC5383-T111 2SC5383-T111 Ripple Ripple FILTER FILTER CN401 DCin /T_R (13.6V) F401 LM73CIMKX-0 K,HK: 450 - 520MHz CN402 I2CCK TEMP T/R SW K2,HK2: 400 - 470MHz I2CDT SENSOR ASSIST BUFF SSM6L05FU-F DC SW...
  • Page 48 NX-800H (K3): TX-RX UNIT (X57-8900-18) (A/2) 150C 2SC5383-T111 2SC5383-T111 Ripple Ripple FILTER FILTER CN401 DCin /T_R (13.6V) LM73CIMKX-0 F401 CN402 I2CCK TEMP T/R SW 380 - 400MHz I2CDT SENSOR ASSIST BUFF SSM6L05FU-F DC SW Q404 SSM3J05FU-F MTM981400BF LMC7101BIM5 RA55H3340M131 8V AVR VCTCXO D103,D104 TCXO_MOD...

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