Kenwood NXR-710 Service Manual

Vhf digital base-repeater

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Page 1 VHF DIGITAL BASE-REPEATER NXR-710 SERVICE MANUAL © 2009-12 PRINTED IN JA PAN B51-8901-00 ( N ) 527 Front panel Knob (Volume) Knob (Power) (A62-1174-03) (K29-5389-03) (K29-9106-04) CH/STATUS VOLUME POWER BUSY Key top Modular jack (K29-9370-02) (E58-0522-05) Antenna cable (TX OUT)
Page 2: General
ﬁ rmware under the license of Digital Voice Systems, ages resulting from the use of the information contained Inc. herein. Kenwood reserves the right to make changes to any products herein at any time for improvement purposes. GENERAL...
Page 3: System Set-Up
• The data stored in the personal computer must match Firmware programming mode [PF1] + Power on (one second) the model type, when it is written into the ﬂ ash memory. • Change the NXR-710 to PC mode, then attach the inter- face cable.
Page 4 4-1. Preface The KPG-46/46A is required to interface the NXR-710 to The NXR-710 uses ﬂ ash memory to allow it to be easily the computer. It has a circuit in its D-sub connector (KPG- upgraded when new features are released in the future.
Page 5: Operating Features
NXR-710 OPERATING FEATURES • “E3” is displayed when PLL is unlocked. 1. Two 7-segment LED Displays Receiver PLL unlocked = BUSY LED blinks. • Channel display (1~30): While operating normally in user Transmitter PLL unlocked = TX LED blinks. mode.
Page 6: Installation
NXR-710 INSTALLATION 1. External Speaker (KES-5) The NXR-710 has a built-in speaker (5W/8Ω), and the external speaker output from the TEST/SPKR connector (15- pin) on the rear of the radio is 4W/4Ω. Use external speaker KES-5. Extracting tool (11-03-0002) Jumper lead 1-1.
Page 7 NXR-710 INSTALLATION 4. Desktop Repeater Top plate (J21-8559-04) Tighten screws When you use the repeater on a desktop, attach the 4 spacers to the base of the repeater as shown in the ﬁ gure. Cushion Insert the plate With these spacers attached, the front panel will not touch...
Page 8: Modification
NXR-710 MODIFICATION 1. DC Source Switch To prevent the power supply from turning off due to misoperation of the DC source switch on the front panel or CONTROL UNIT (X53-4490-10) accidents (tampering) after installation, the main unit can be Component side kept on regardless of the on/off setting of the DC source switch on the front panel.
Page 9: Circuit Description
Wilkinson divider. The divided signal is fed to the PLL 1. Outline IC for the receiver. Another signal is fed to the transmitter The NXR-710 is a VHF repeater operating in the 136~ reference 16.8MHz PLL IC through PIN diode switch (D505) 174MHz frequency range.
Page 10 NXR-710 CIRCUIT DESCRIPTION X58-5080-10 SPSCLK0 16.8MHz SPSD0 TX VCO /16_8PCS /PLL Buffer IC603 Q602 IC602 Q603 X600 IC604 16.8MHz PLL IC Loop filter 10MHz or 19.2MHz Fig. 2 Transmitter reference 16.8MHz PLL circuit 2-3. Transmitter Main PLL circuit (SUB unit) minal and realizes the “Phase Locked Loop”...
Page 11 NXR-710 CIRCUIT DESCRIPTION volume control circuit. The 2nd electronic volume control LNA AMP RX ANT Q101 circuit adjusts the modulating signal and is fed to IC606. CN101 IC603 is an inverting ampliﬁ er for inverting the ampliﬁ - 136~ 174MHz cation of the modulating signal.
Page 12 NXR-710 CIRCUIT DESCRIPTION provides a second mixer, AGC ampliﬁ er, and RSSI (Received When the frequency is controlled by the PLL, the fre- Signal Strength Indicator). quency convergence time increases as the frequency dif- The second mixer mixes the ﬁ rst IF signal with the 57.6 ference increases when the set frequency is changed.
Page 13 NXR-710 CIRCUIT DESCRIPTION CN701 Q702,Q703 IC702 8V AVR from Final unit (X45-392 A/3) Ripple Filter 80C_1 CN700 Ripple Filter 80C_2 +B,SB IC701 to Control unit 15V DC/DC Ripple Filter 150C_1 (X53-449) Ripple Filter 150C_2 Q700,Q701 5V AVR Q705,Q706 IC700 IC704 3V AVR 3.3V AVR...
Page 14 NXR-710 CIRCUIT DESCRIPTION 3-2. CM coupler circuit 3-6. FAN action control circuit The CM coupler circuit is a line for detecting forward The FAN action control circuit consists of the FAN and wave and reﬂ ected wave. Forward wave is detected by D3, switching transistor Q207.
Page 15 NXR-710 CIRCUIT DESCRIPTION 4-2. Memory circuit 4-4. Squelch circuit The Memory circuit consists of the MCU (IC20), the The Squelch circuit ampliﬁ es the demodulated noise sig- SRAM (IC9), and the ﬂ ash memory (IC3). nal from IC6 after ﬁ ltering through the BPF circuit. The pro- The ﬂ...
Page 16 NXR-710 CIRCUIT DESCRIPTION 4-6. Power supply voltage monitoring circuit IC307 is a voltage detect IC and is used to generate the “/BINT” signal for the MCU (IC20). The X53-449 circuit consists of IC307, IC308, D303 and This “/BINT” signal is connected to the hardware inter- Q301.
Page 17: Display Unit
NXR-710 CIRCUIT DESCRIPTION AMP_B INT_SP AMP_SW EXT_SP IC412 Audio_AMP IC402 IC412 IC412 IC405 IC501 (C/4) MICADC0 IC404 (B/2) MICADC1 IC404(A/2) MODDAC SPDAC IC20 CR-LPF PWM1 signal ADC1 Squelch DAC IC14 Fig. 16 Modulation circuit (Analog/Digital signal processing) 5. Display unit 5-1.
Page 18: Components Description
NXR-710 COMPONENTS DESCRIPTION FINAL UNIT (X45-3920-10) Ref. No. Part Name Description Ref. No. Part Name Description IC401 MOS-IC NAND gate IC201,202 MOS-IC DC ampliﬁ er IC402 MOS-IC Analog switch IC203 Analogue IC Voltage regulator IC403 Bi-polar IC AF power ampliﬁ er...
Page 19 NXR-710 COMPONENTS DESCRIPTION Ref. No. Part Name Description Ref. No. Part Name Description Q507 DC switch Q501 Transistor RF ampliﬁ er Q508~511 Transistor DC switch Q502,503 RF ampliﬁ er Q512~514 DC switch Q504 Transistor RF ampliﬁ er Q516~519 DC switch...
Page 20: Parts List
NXR-710 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 21 NXR-710 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 22 NXR-710 PARTS LIST FINAL UNIT (X45-3920-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation CK73GB1E105K CHIP C 1.0UF L41-5678-14 SMALL FIXED INDUCTOR (56NH) ✽ C93-1747-05 CHIP C 130PF...
Page 23 NXR-710 PARTS LIST FINAL UNIT (X45-3920-10) CONTROL UNIT (X53-4490-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R218,219 RK73GB2A104J CHIP R 100K 1/10W CK73HB1A105K CHIP C 1.0UF R220...
Page 24 NXR-710 PARTS LIST CONTROL UNIT (X53-4490-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C151-155 CK73HB1H102K CHIP C 1000PF C258 CC73HCH1H101J CHIP C 100PF C156 CC73HCH1H221J CHIP C...
Page 25 NXR-710 PARTS LIST CONTROL UNIT (X53-4490-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C446 CK73HB1A104K CHIP C 0.10UF RK73HB1J104J CHIP R 100K 1/16W C450,451 CK73HB1A105K CHIP C 1.0UF...
Page 26 NXR-710 PARTS LIST CONTROL UNIT (X53-4490-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R152 RK73HB1J102J CHIP R 1.0K 1/16W R303 RK73HB1J104J CHIP R 100K 1/16W R153 RK73HB1J473J...
Page 27 NXR-710 PARTS LIST CONTROL UNIT (X53-4490-10) DISPLAY UNIT (X54-3580-20) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R457 RK73HB1J000J CHIP R 1/16W IC302 XC6201P502PR MOS-IC R458-460 RK73HB1J101J CHIP R...
Page 28 NXR-710 PARTS LIST DISPLAY UNIT (X54-3580-20) TX-RX UNIT (X57-7940-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation CP501-504 RK75GB1J471J CHIP-COM 470 1/16W C118 CC73HCH1H220G CHIP C 22PF R502,503...
Page 29 NXR-710 PARTS LIST TX-RX UNIT (X57-7940-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation ✽ C246 CK73HB1H103K CHIP C 0.010UF C523 CC73HCH1H331J CHIP C 330PF C247 CK73HB1H102K CHIP C...
Page 30 NXR-710 PARTS LIST TX-RX UNIT (X57-7940-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C655 CK73HB1H102K CHIP C 1000PF CN700,701 E41-2672-05 PIN ASSY C656 CE32CL1V100M CHIP EL 10UF...
Page 31 NXR-710 PARTS LIST TX-RX UNIT (X57-7940-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation L609 L41-1578-14 SMALL FIXED INDUCTOR (15NH) R231 RK73HB1J000J CHIP R 1/16W L610 L41-8278-14 SMALL FIXED INDUCTOR (82NH)
Page 32 NXR-710 PARTS LIST TX-RX UNIT (X57-7940-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R447 RK73HB1J000J CHIP R 1/16W R616 RK73HB1J103J CHIP R 1/16W R448,449 RK73HB1J334J CHIP R...
Page 33 NXR-710 PARTS LIST TX-RX UNIT (X57-7940-10) RX VCO/PLL UNIT (X58-5070-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R704 RK73HB1J472J CHIP R 4.7K 1/16W IC501 TC75S59F-F MOS-IC R705...
Page 34 NXR-710 PARTS LIST RX VCO/PLL UNIT (X58-5070-10) TX VCO/PLL UNIT (X58-5080-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C313 CC73HCH1H101J CHIP C 100PF R308 RK73HB1J100J CHIP R...
Page 35 NXR-710 PARTS LIST TX VCO/PLL UNIT (X58-5080-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C323 CC73GCH1H030B CHIP C 3.0PF R317 RK73HB1J101J CHIP R 1/16W C324 CC73HCH1H101J CHIP C...
Page 36: Exploded View
NXR-710 EXPLODED VIEW : N09-2292-05 M2.6 x 6 : N30-2606-48 M4 x 6 : N30-4006-48 M4 x 14 : N30-4014-48 M4 x 20 : N30-4020-43 M3 x 6 (F) : N32-3006-48 M4 x 8 (F) : N32-4008-43 M3 x 6 (Bi)
Page 37 NXR-710 EXPLODED VIEW Jx14 X45 (B/3) (C/3) 47x2 Parts with the exploded numbers larger than 700 are not supplied. If a part reference number is listed in a box on the exploded view of the PCB, that part does not come with the PCB.
Page 38: Packing
NXR-710 PACKING 56 Protection bag (H25-0762-04) 50 Cushion (G13-1801-04) x 4 15 DC cord (E30-3427-35) 51 Cushion (G13-1802-04) x 4 74 Line filter (L79-1419-05) 55 Protection bag (H25-0747-04) 67 Band (J61-0307-05) 64 Mounting hardware (J21-8559-04) 710 Pamphlet 711 Pamphlet 10 Instruction manual...
Page 39: Adjustment
To connect the Control unit (CN38) to the TX-RX unit 3: GND (CN800) while in servicing, you can use the 36-pin ﬂ at cable, 4: PTT/TXD E37-0979-05, which is available from the KENWOOD parts (PC serial data from transceiver) center. 5: MIC GND...
Page 40 NXR-710 ADJUSTMENT Test Channel Test Signaling (Analog) RX (Decode Signaling) TX (Encode Signaling) 155.050000MHz 155.100000MHz None None 136.050000MHz 136.100000MHz None 100Hz Square Wave 173.950000MHz 173.900000MHz QT 67.0Hz QT 67.0Hz 155.000000MHz 155.000000MHz QT 151.4Hz QT 151.4Hz 155.200000MHz 155.200000MHz QT 210.7Hz QT 210.7Hz 155.400000MHz...
Page 41 NXR-710 ADJUSTMENT Common Section Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 1. Setting 1) Connect the unit to a suitable power supply (13.6V). 2) Turn the power switch on after connecting a PC and FPU cable to the radio.
Page 42 NXR-710 ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 5. Sensitivity 2 FPU Test mode Write the value as Press [Apply All] button to Adjust 1) Adjust Item: [Sensitivity 2] followings (typical store the adjustment value.
Page 43: Receiver Section
NXR-710 ADJUSTMENT Receiver Section Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 1. RD Output FPU Test mode Rear RX ANT 80mV ±5mV level Adjust 1) Adjust Item: [RD Level (Ana- [Analog log Wide)]...
Page 44 NXR-710 ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 6. Open FPU Test mode Rear RX ANT Press [Apply] button to store Squelch 1) Adjust Item: [Open Squelch Audio the adjustment value.
Page 45 NXR-710 ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 10. RSSI FPU Test mode Rear RX ANT Press [Apply] button to store Refarence 1) Adjust Item [RSSI Ref (Analog Audio the adjustment value.
Page 46 NXR-710 ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 15 .Low RSSI FPU Test mode Rear RX ANT Press [Apply] button to store Adjust 1) Adjust Item [Low RSSI (NXDN the adjustment value.
Page 47 NXR-710 ADJUSTMENT Transmitter Section Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 1. High Trans- FPU Test mode Power meter Rear TX ANT 53W±1.5W Press [Apply] button to store mit Power 1) Adjust Item: [High Transmit the adjustment value.
Page 48 NXR-710 ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 9. Balance FPU Test mode Deviation Rear TX ANT The Deviation of 2kHz Tone deviation is within Adjust 1) Adjust Item: [Balance] meter 20Hz frequency is ±1.0% of 20Hz tone devia-...
Page 49 NXR-710 ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 11. TD Devia- FPU Test mode Deviation Rear TX ANT 0.75kHz Deviation ±0.1kHz tion adjust 1) Adjust Item: [TD Deviation meter [Analog (Analog Wide)]...
Page 50 NXR-710 ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 15. QT Devia- FPU Test mode Deviation Rear TX ANT 0.75kHz Deviation ±0.05kHz tion adjust 1) Adjust Item: [QT Deviation meter [Analog (Analog Wide)]...
Page 51 NXR-710 ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 21. Test Tone FPU Test mode Deviation Rear TX ANT 3.0kHz Deviation ±0.1kHz Deviation 1) Adjust Item: [Test Tone De- meter adjust viation (Analog Wide)]...
Page 52 NXR-710 ADJUSTMENT Measurement Adjustment Item Condition Speciﬁ cations / Remarks Test- Unit Terminal Unit Parts Method equipment 27. Repeat FPU Test mode Deviation Rear TX ANT 1.0kHz Deviation ±0.1kHz Gain adjust 1) Adjust Item: [Repeat Gain meter [Analog (Analog Wide)]...
Page 53: Terminal Function
NXR-710 TERMINAL FUNCTION Final Unit (X45-3920-10) (A/3) Pin No. Name Function Pin No. Name Function N_SYNC1_A I/O RS-485 differential signal 1-A CN1 (To X57-794 CN610) N_SYNC2_B I/O RS-485 differential signal 2-B TX IN TX driver input signal (Coaxial) N_SYNC2_A I/O RS-485 differential signal 2-A...
Page 54 NXR-710 TERMINAL FUNCTION Pin No. Name Function Pin No. Name Function Auto gain control voltage Auxiliary output 2 3.3V voltage Auxiliary output 1 /EWP EEPROM write control signal Internal speaker AF input HWV1 Hardware version signal RSSI voltage I2CCK Serial clock...
Page 55 NXR-710 TERMINAL FUNCTION Display Unit (X54-3580-20) (A/2) Pin No. Name Function Pin No. Name Function MIC ground CN501 (To X54-358 B/2 CN601) MIC signal output Hook detection input/ RXD input Hook detection output/ RXD output MIC signal input J601 (MIC jack)
Page 56 NXR-710 TERMINAL FUNCTION Pin No. Name Function Pin No. Name Function TXASSIST Assist voltage output /RXPCS_TR RX PLL chip select signal CN608 (To X58-508 CN351) TXVCOA TX VCO A control signal VCO input RXVCOA/B RX VCO control signal to A or B...
Page 57 NXR-710 TERMINAL FUNCTION Pin No. Name Function Signal Modiﬁ - Description/ Port Type Name Type cation No connection RX Signal GND RXASSIST Assist voltage input Digital Speaker Mute/ CMOS CN351 (To X57-794 CN203) BER_CLK O Digital for Bit Error Rate Clock...
Page 58 NXR-710 PC BOARD FINAL UNIT (X45-3920-10) Component side view (J79-0263-09) J79-0263-09 CN202 GND (BLACK) CN302 N_SYNC2_A CN303 N_SYNC2_B CN304 N_SYNC1_A D202 CN305 N_SYNC1_B CN306 N_SYNC2_A CN307 CN201 N_SYNC2_B +B (RED) CN308 N_SYNC1_A CN309 N_SYNC1_B R351 J79-0263-09 C229 C252 CN203 J79-0263-09 Ref.
Page 59: Pc Board Final Unit (X45-3920-10)
NXR-710 PC BOARD FINAL UNIT (X45-3920-10) Component side view (J79-0263-09) TX ANT R354 TH201 R215 C207 R208 R221 IC202 R205 C201 R219 R210 R220 IC201 R203 C251 C250 C252 CN204 ANT SW Component side Layer 1 Layer 2 Layer 3...
Page 60 NXR-710 PC BOARD FINAL UNIT (X45-3920-10) Foil side view (J79-0263-09) C249 Ref. No. Address Q203 Q204 Q205 Q206 Q207 D203...
Page 61 NXR-710 PC BOARD FINAL UNIT (X45-3920-10) Foil side view (J79-0263-09) J79-0263-09 J79-0263-09 Q204 Q206 Q203 Q205 C241 R236 R235 J79-0263-09 Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side...
Page 62: Control Unit (X53-4490-10)
NXR-710 PC BOARD CONTROL UNIT (X53-4490-10) Component side view (J79-0277-09) C162 C160 C157 N_SYNC1_B C154 N_SYNC1_A C322 C152 N_SYNC2_B C150 CN32 C311 N_SYNC2_A C147 CN33 N_SYNC2_B N_SYNC2_A N_SYNC1_B L304 N_SYNC1_A IC302 C310 C472 R167 R177 R180 R182 R228 R230 R221...
Page 63 NXR-710 PC BOARD CONTROL UNIT (X53-4490-10) Component side view (J79-0277-09) C302 IC305 C329 R301 C301 R302 R323 CN302 CN25 CN24 /FLDM C124 C125 C118 CN39 IF_SIG C119 C101 C126 C102 C127 C103 R269 R226 R162 IC28 C466 C184 C158 C136...
Page 64 NXR-710 PC BOARD CONTROL UNIT (X53-4490-10) Foil side view (J79-0277-09) R131 C104 R133 R124 R122 R118 R137 R149 R150 C470 R151 Q301 R315 D303 C469 C132 C336 C133 R186 R190 IC24 R320 IC308 CN28 BSCAN1 R424 R426 R160 C130 C131...
Page 65 NXR-710 PC BOARD CONTROL UNIT (X53-4490-10) Foil side view (J79-0277-09) R306 C306 R304 R307 R305 IC301 R313 D301 R315 D303 C469 C441 C107 R190 C420 C412 C434 R421 CN401 R433 IC23 R441 C429 C438 R413 R443 R425 C106 C409 R422...
Page 66: Display Unit (X54-3580-20)
NXR-710 PC BOARD DISPLAY UNIT (X54-3580-20) Component side view (J79-0035-09) VR601 J601 IC504 D503 J79-0035-09 B/2 S501 S504 S502 S503 Q512...
Page 67 NXR-710 PC BOARD DISPLAY UNIT (X54-3580-20) Component side view (J79-0035-09) J79-0035-09 A/2 S507 POWER D505 D506 D507 MAIN BACK- IC504 IC505 D504 BUSY Component side S505 S506 Layer 1 Layer 2 Foil side Q514 Ref. No. Address IC504 IC505 Q512...
Page 68 NXR-710 PC BOARD DISPLAY UNIT (X54-3580-20) Foil side view (J79-0035-09) J79-0035-09 A/2 CP504 CP502 CP503 CP501 BACKUP MAIN DC R543 R606 R517 Q525 Q507 Q504 Q509 R538 BUSY R518 Q503 D508 D509 C516 C517 R525 C526 Component side C518 D502...
Page 69 NXR-710 PC BOARD DISPLAY UNIT (X54-3580-20) Foil side view (J79-0035-09) CN601 C606 C603 C602 D602 D601 R601 J79-0035-09 B/2 CN502 C513 R522 C508 R511 R512 R529 R513 Q513 R533 IC501...
Page 70: Tx-Rx Unit (X57-7940-10)
NXR-710 PC BOARD TX-RX UNIT (X57-7940-10) Component side view (J79-0265-09) CN101 RX ANT C438 C437 IC407 IC408 CN701 CN205 2nd_Lo F700 R417 R418 C428 C429 C430 R431 IC405 IC406 R415 C408 R409 R410 R406 IC400 C403 CN810 VOUT4 C406 CN814...
Page 71 NXR-710 PC BOARD TX-RX UNIT (X57-7940-10) Component side view (J79-0265-09) CN801 CN610 CN805 ASWC R860 TXVCOB R660 C661 80C_1 SPSCLK0 R657 R665 CN606 TX_CV TXVCOA /TXPCS A2: TX VCO/PLL UNIT IC608 (X58-5080-10) TX_CV SPSD0 R658 C649 R645 TXASSIST CN604 CN603...
Page 72 NXR-710 PC BOARD TX-RX UNIT (X57-7940-10) Foil side view (J79-0265-09) C686 C673 C683 R682 R671 C679 R680 R690 L609 R686 R672 C685 C667 C674 Q606 C680 L102 C115 C161 IC601 L607 C600 L100 R651 R650 C664 C601 C602 C542 C102...
Page 73 NXR-710 PC BOARD TX-RX UNIT (X57-7940-10) Foil side view (J79-0265-09) CN102 L108 R129 R137 L109 C124 L116 L118 Q101 B C130 R125 R128 L113 C161 C134 C138 C147 C151 C123 C125 L105 C120 C142 R114 C116 C137 C139 C146 C148...
Page 74: Rx Vco/Pll Unit (X58-5070-10)
NXR-710 PC BOARD RX VCO/PLL UNIT (X58-5070-10) RX VCO/PLL UNIT (X58-5070-10) Component side view (J79-0267-09) Foil side view (J79-0267-09) CN303 R313 R314 R323 R312 R319 R321 C331 L315 C328 L314 L307 C335 L313 C312 C324 C318 R307 C317 C320 C326...
Page 75: Tx Vco/Pll Unit (X58-5080-10)
NXR-710 PC BOARD TX VCO/PLL UNIT (X58-5080-10) TX VCO/PLL UNIT (X58-5080-10) Component side view (J79-0268-09) Foil side view (J79-0268-09) CN303 R313 R323 R312 R319 R321 C331 L315 R318 C328 L314 L307 C335 L313 C312 C324 C318 R307 C317 C320 C326...
Page 76: Interconnection Diagram
NXR-710 INTERCONNECTION DIAGRAM CN43 INT SP CN301 CN700 CN39 CN802 IF_SIG CN38 CN800 CONTROL UNIT TX-R TMP1 TMP1 (X53-449) TMP2 TMP2 RAMP RAMP TXASSIST TXASSIST DISPLAY UNIT RXASSIST RXASSIST (X54-358) (A/2) TX_CV TX_CV RX_CV RX_CV TXVCOB TXVCOB RXVCOA/B RXVCOA/B CN502...
Page 77 NXR-710 INTERCONNECTION DIAGRAM FINAL UNIT (X45-392) (C/3) N SYNC2 N_SYNC1_B N_SYNC1_A N_SYNC2_B N_SYNC2_A N_SYNC1_B N_SYNC1_A N_SYNC2_B N_SYNC2_A N SYNC1 CN101 RX ANT CN500 Ext IN CN201 MAIN DC CN701 CN203 – TX-RX UNIT (X57-794) CN202 FINAL UNIT FINAL UNIT CN801...
Page 78: Schematic Diagram
NXR-710 SCHEMATIC DIAGRAM FINAL UNIT (X45-3920-10) (A/3) T:7.96V T:13.2V R:0V R:13.6V 3.0A FINAL AMP TX DRIVE AMP RF AMP RF AMP T:0dBm T:23dBm PD55003S-E PD70HVF1-101 2SC3357-A 2SC3357-A 100n 1000p 1000p 470p RF SW T:3.33V T:2.76V 1SS226-F R:0V R:0V VOLTAGE REFERENCE...
Page 79 NXR-710 SCHEMATIC DIAGRAM FINAL UNIT (X45-3920-10) (A/3) T:47dBm TX ANT 470p 470p RF DETECTOR RF DETECTOR SURGE PROTECTION HSM88AS-E HSM88AS-E 1000p D7,8 RF SW MA2S111-F R221 RF DETECTOR CN203 ANT SW FINAL UNIT (X45-3920-10) (B/3) D202 CN301 SURGE PROTECTOR CN201...
Page 80 NXR-710 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4490-10) VOLTAGE REGULATOR IC302 5.0V 33BU XC6201P502PR L306 L307 13.6V 13.6V VOUT 3.3V VOLTAGE REGULATOR IC306 XC6204B332P1 L316 VoUT L301 CN301 L302 L315 L303 R301 L313 R302 L314 3.3V D302 D304,305 6.0V 3.3V SURGE PROTECTOR...
Page 81 NXR-710 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4490-10) 33BU 33BU 33M_1 33M_1 A[0] A[1] A[2] A[3] A[4] DVDD_1 A[5] CLKIN A[6] HA[6] HA[0] A[7] HA[7] HA[1]/HCNTL1 A[8] A[0] HA[8] A[9] A[1] HA[9] A[10] A[2] HA[10] A[11] A[3] HA[11] A[12] A[4] HA[12] A[13]...
Page 82 NXR-710 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4490-10) 33BU 33BU 33M_1 33M_1 IC16 SM5023CNDH-G 3.3V R114 L77-3015-05 0.01u INHN R132 BUFFER AMP R119 3.3V 470k 0.1u 33M_2 DGND3 DGND2 XTALI DGND1 STR_SEL C115 0.1u DSPCK XTALo DVDIo7 /RiNT C116 0.1u DVDIo6 C117 0.1u...
Page 83 NXR-710 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4490-10) 33BU SQDAC 33M_1 CN22 CN23 CODEC R110 IC14 AK4386VTP 6.8k 242mVrms DIF0 R111 100k RoUT DFS1 100k LoUT DFS0 VCoM LRCK DETECTOR SDTI DIF1 BICK AF AMP AF AMP TEST MCLK IC13 IC15 TC75W51FK(F)
Page 84 NXR-710 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4490-10) C132 0.01u C134 0.01u C136 1000p C133 1000p C135 1000p C137 0.01u AND GATE OR GATE AND GATE IC24 IC25 IC26 TC7SH08FU-F TC7SH32FU-F TC7SET08FU-F R162 oUTY oUTY oUTY 100k R425 R414 C443 W:366mVrms 0.1u...
Page 85 NXR-710 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4490-10) R502 CN39 iF_SiG TX-RX UNIT (X57-7940-10)-CN802 C166 0.01u R268 CN38 R255 TMP1 TMP1 R256 TMP2 TMP2 R257 RAMP RAMP R258 R259 TXASSiST TXASSiST R260 RXASSiST RXASSiST R261 TX_CV TX_CV R163 R262 RX_CV RX_CV 330k MIC&TA...
Page 86 NXR-710 SCHEMATIC DIAGRAM DISPLAY UNIT (X54-3580-20) (A/2) D506 CP501 LA-501DD 470*4 S506 S501 S502 S503 S504 S505 7SEGMENT DC SW C519 0.01u Q517 UPA672T-A SHIFT REGISTER DC SW DC SW DC SW Q’S Q512 Q513 Q514 UPA672T-A UPA672T-A UPA672T-A C512 0.01u...
Page 87 NXR-710 SCHEMATIC DIAGRAM DISPLAY UNIT (X54-3580-20) (A/2) D507 CP502 LA-501DD CP503 470*4 CP504 470*4 470*4 7SEGMENT DC SW C520 0.01u Q518 DC SW SHIFT UPA672T-A Q521 REGISTER DC SW UPA672T-A Q’S DC SW Q519 DC SW UPA672T-A Q522 DATA DC SW...
Page 88 NXR-710 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7940-10) 13.54V CN700 TX VCO/PLL (E23-1278-05) RX VCO/PLL (E23-1278-05) R860 13.6V CN807 CN808 CN809 CN811 CN812 CN813 CONTROL UNIT (X53-4490-10) VOLTAGE R861 REGULATOR -CN301 DC SW IC702 13.6V 7.93V NJM78M08FA-ZB F700 Q702 2SJ506-E(S) FINAL UNIT...
Page 89 NXR-710 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7940-10) DC SW Q500 SSM6L05FU-F 50ER 50ER INT Ref:0V C541 0.1u OP AMP EXT Ref:5.04V R524 IC501 DC SW C542 TC75S59F-F 100k Q507 UPA672T-A BUFFER AMP IC500 C532 TC75W51FK(F) C503 C510 0.1u oUTA C549 0.1u 0.1u...
Page 90 NXR-710 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7940-10) 19.2MHz or 10MHz --> 19.2MHz or 10MHz --> CN600 C608 0.01u DC SW DC SW Q601 L601 Q600 R605 2SA1832(GR)F SSM3K15TE(F) R607 16.8MHz MOD PLL 100k BUFFER 16.8MHz PLL IC600 IC602 ADF4001BRUZ TC7WH126FU-F 3.26V...
Page 91 NXR-710 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7940-10) 16.8MHz--> 16.8MHz--> 4.96V MB_CV2 CN602 1.48V X600 C616 C620 3.02V <--16.8MHz L77-1960-15 C636 R632 C641 L604 L605 C623 oUTPUT 4.94V 1.70V 2.37V 0.01u 1.8k 0.01u Q603 330n 390n 3.27V 0.01u 2SC4617(R) Q602 C630 R625...
Page 92 NXR-710 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7940-10) SUB UNIT (TX VCO/PLL) (X58-5080-10) (B/2) Q350 VCOA:7.07V SSM6L05FU-F R361 VCOB:0V 7.05V R350 470k R354 V-TXVCO A D352,355,358,359 470k FREQUENCY CONTROL DC SW VCO OSC L350 R357 C354 D355 C362 VCOA:3.30V Q352 VCOB:0V MCH3914(8)-H...
Page 93 NXR-710 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7940-10) SUB UNIT (RX VCO/PLL) (X58-5070-10) (B/2) Q350 VCOA:6.94V SSM6L05FU-F R361 VCOB:0V R350 470k R354 D352,355,358,359 470k C370 FREQUENCY C380 CONTROL Q352 DC SW VCO A Q352 VCO OSC L350 R352 R357 C354 D355 C362...
Page 94 NXR-710 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7940-10) 7.90V -110.8dBm -108.0dBm 7.31V C160 C101 C105 L102 C115 C161 C124 R137 1000p 1000p 270n 1000p 10p(B) 10p(B) 3.61V RF AMP D103,104 L109 D100,101 Q101 2SC5337 FREQUENCY FREQUENCY CONTROL CONTROL 2.85V FL:3.19V FC:4.44V R111 R112 FH:7.21V...
Page 95 NXR-710 SCHEMATIC DIAGRAM TX-RX UNIT (X57-7940-10) 0dBm R:7.96V 1dB ATT 3dBm T:4.26V RF SW 136-174MHz --> FINAL UNIT C680 C667 L609 C674 R672 C685 D601 C679 R681 C683 CN610 7.82V (X45-3920-10) 1000p 3p(B) 1000p HVC131 1000p 1000p 2.12V (A/3)-CN1 Q606...
Page 96: Block Diagram
NXR-710 BLOCK DIAGRAM FINAL UNIT (X45-392) TX-RX UNIT (X57-794) BUFF FINAL AMP DRIVE AMP DRIVE AMP DRIVE AMP Q606 D601 2SC5 RD70HVF1-101 TX ANTENNA CM COUPLER PD55003S-E 2SC3357-A 2SC3357-A CN610 HVC131 LOW PASS FILTER Vcont LOW PASS FILTER MOD PLL IC...
Page 97 NXR-710 BLOCK DIAGRAM CV AMP TX-RX UNIT (X57-794) SPSCLK0,SPSD0 IC608 TXVCOA,TXVCOB, TX_CV TC75W51FK(F) /TXPCS ASSIST AMP IC607 BUFFER LMC7101BIM5 MOD AMP Q606 D601 TXASSIST IC606 2SC5636 HVC131 CN610 LMC7101BIM5 VCO/PLL VREF X58-5080-10 IC605 TC75S51FE(F) IC604 LOW PASS FILTER LMC7101BIM5 MOD PLL IC 16.8MHz...
Page 98 NXR-710 BLOCK DIAGRAM IC500 (B/2) IC500 (A/2) TC75W51FK(F) TC75W51FK(F) DETECTOR D503 BUFFER HSM88AS-E Q501 2SC4617(R) EXT_IN 10MHz 10MHz or 19.2MHz D504,505 AGC AMP JDP4P02AT LOW PASS FILTER Q503 3SK294-FP SPSCLK0,SPSD0 Q504 1dB ATT RXVCOA/B, LOW PASS FILTER 2SC4617(R) /RXPCS_TR IF AMP...
Page 99: Optional Accessories Kes-5 (External Speaker)
NXR-710 OPTIONAL ACCESSORIES: KES-5 (EXTERNAL SPEAKER) When Using an External Speaker Speciﬁ cations 1. Make sure the unit’s power is tuned off. Maximum input power ........... 40W 2. When using the external speaker, remove the jumper Impedance ................. 4Ω lead from the connector, and attach the speaker cable.
Page 100: Specifications
8K30F7W, 4K00F1E, 4K00F1D,4K00F7W, 4K00F2D Analog measurements made per TIA/EIA 603 and speciﬁ ca- tions shown are typical. KENWOOD reserves the right to change speciﬁ cations with- out prior notice or obligation. 2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525 Japan P.O. BOX 22745, 2201 East Dominguez Street, Long Beach, Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands CA 90801-5745, U.S.A.
Page 101 NXR-710 NXR-710 PC BOARD PC BOARD FINAL UNIT (X45-3920-10) FINAL UNIT (X45-3920-10) Component side view (J79-0263-09) Component side view (J79-0263-09) J79-0263-09 CN202 GND (BLACK) TX ANT CN302 N_SYNC2_A CN303 N_SYNC2_B CN304 R354 N_SYNC1_A D202 CN305 N_SYNC1_B CN306 N_SYNC2_A CN307 CN201...
Page 102 NXR-710 NXR-710 PC BOARD PC BOARD FINAL UNIT (X45-3920-10) FINAL UNIT (X45-3920-10) Foil side view (J79-0263-09) Foil side view (J79-0263-09) J79-0263-09 J79-0263-09 Q204 Q206 Q203 Q205 C241 R236 R235 C249 J79-0263-09 Component side Ref. No. Address Q203 Layer 1 Q204...
Page 103 NXR-710 NXR-710 PC BOARD PC BOARD CONTROL UNIT (X53-4490-10) CONTROL UNIT (X53-4490-10) Component side view (J79-0277-09) Component side view (J79-0277-09) C162 C160 C157 N_SYNC1_B C154 N_SYNC1_A C322 C152 N_SYNC2_B C150 CN32 C311 N_SYNC2_A C147 CN33 N_SYNC2_B N_SYNC2_A C302 N_SYNC1_B L304...
Page 104 NXR-710 NXR-710 PC BOARD PC BOARD CONTROL UNIT (X53-4490-10) CONTROL UNIT (X53-4490-10) Foil side view (J79-0277-09) Foil side view (J79-0277-09) R306 C306 R304 R307 R305 R131 C104 R133 R124 IC301 R122 R118 R137 R149 R313 R150 C470 R151 D301 Q301...
Page 105 NXR-710 NXR-710 PC BOARD PC BOARD DISPLAY UNIT (X54-3580-20) Component side view (J79-0035-09) DISPLAY UNIT (X54-3580-20) Component side view (J79-0035-09) J79-0035-09 A/2 VR601 S507 POWER D505 D506 D507 MAIN BACK- J601 IC504 IC505 D503 D504 BUSY J79-0035-09 B/2 Component side...
Page 106 NXR-710 NXR-710 PC BOARD PC BOARD DISPLAY UNIT (X54-3580-20) Foil side view (J79-0035-09) DISPLAY UNIT (X54-3580-20) Foil side view (J79-0035-09) J79-0035-09 A/2 CN601 C606 C603 C602 CP504 CP502 D602 D601 CP503 CP501 BACKUP MAIN DC R601 R543 R606 R517 Q525...
Page 107 NXR-710 NXR-710 PC BOARD PC BOARD TX-RX UNIT (X57-7940-10) TX-RX UNIT (X57-7940-10) Component side view (J79-0265-09) Component side view (J79-0265-09) CN801 CN610 CN805 ASWC R860 CN101 RX ANT TXVCOB R660 C661 80C_1 SPSCLK0 R657 R665 CN606 TX_CV TXVCOA /TXPCS A2: TX VCO/PLL UNIT...
Page 108 NXR-710 NXR-710 PC BOARD PC BOARD TX-RX UNIT (X57-7940-10) TX-RX UNIT (X57-7940-10) Foil side view (J79-0265-09) Foil side view (J79-0265-09) CN102 C686 C673 C683 R682 L108 R671 C679 R680 R690 L609 R129 R672 C685 R686 R137 C667 L109 C674 C124...
Page 109 NXR-710 PC BOARD RX VCO/PLL UNIT (X58-5070-10) RX VCO/PLL UNIT (X58-5070-10) Component side view (J79-0267-09) Foil side view (J79-0267-09) CN303 R313 R314 R323 R312 R319 R321 C331 L315 C328 L314 L307 C335 L313 C312 C324 C318 R307 C317 C320 C326...
Page 110 NXR-710 PC BOARD TX VCO/PLL UNIT (X58-5080-10) TX VCO/PLL UNIT (X58-5080-10) Component side view (J79-0268-09) Foil side view (J79-0268-09) CN303 R313 R323 R312 R319 R321 C331 L315 R318 C328 L314 L307 C335 L313 C312 C324 C318 R307 C317 C320 C326...
Page 111 FINAL UNIT (X45-3920-10) (A/3) T:7.96V T:13.2V R:0V R:13.6V 3.0A T:47dBm TX DRIVE AMP FINAL AMP RF AMP RF AMP TX ANT T:0dBm T:23dBm 470p 470p PD55003S-E PD70HVF1-101 2SC3357-A 2SC3357-A 100n 1000p 1000p 470p RF DETECTOR RF DETECTOR RF SW SURGE PROTECTION HSM88AS-E HSM88AS-E 1SS226-F...
Page 112 CONTROL UNIT (X53-4490-10) R502 CN39 iF_SiG TX-RX UNIT (X57-7940-10)-CN802 C166 0.01u R268 R255 CN38 TMP1 TMP1 TMP2 R256 TMP2 R257 RAMP VOLTAGE RAMP REGULATOR R258 XC6201P502PR IC302 5.0V 33BU 33BU 33BU 33BU 33BU 33BU TXASSiST R259 TXASSiST RXASSiST R260 RXASSiST 13.6V 13.6V L306...
Page 113 DISPLAY UNIT (X54-3580-20) (A/2) D506 D507 CP501 CP502 LA-501DD LA-501DD 470*4 470*4 CP503 CP504 470*4 470*4 S506 S501 S502 S503 S504 S505 7SEGMENT 7SEGMENT DC SW DC SW C519 0.01u C520 0.01u Q517 UPA672T-A Q518 DC SW SHIFT SHIFT UPA672T-A Q521 REGISTER REGISTER...
Page 114 TX-RX UNIT (X57-7940-10) CN700 13.54V TX VCO/PLL (E23-1278-05) RX VCO/PLL (E23-1278-05) R860 13.6V CONTROL UNIT CN807 CN808 CN809 CN811 CN812 CN813 (X53-4490-10) VOLTAGE R861 0dBm -CN301 REGULATOR 3dBm R:7.96V 1dB ATT DC SW IC702 16.8MHz--> 16.8MHz--> RF SW T:4.26V 136-174MHz --> 13.6V F700 NJM78M08FA-ZB...
Page 115 : N09-2292-05 M2.6 x 6 : N30-2606-48 M4 x 6 : N30-4006-48 M4 x 14 : N30-4014-48 M4 x 20 : N30-4020-43 Jx14 M3 x 6 (F) : N32-3006-48 M4 x 8 (F) : N32-4008-43 M3 x 6 (Bi) : N35-3006-43 M4 x 6 (Bi) : N35-4006-43 M3 x 8...
Page 116 CV AMP FINAL UNIT (X45-392) TX-RX UNIT (X57-794) SPSCLK0,SPSD0 IC608 IC500 (B/2) IC500 (A/2) TXVCOA,TXVCOB, TC75W51FK(F) TX_CV TC75W51FK(F) TC75W51FK(F) /TXPCS ASSIST AMP DETECTOR IC607 D503 BUFFER FINAL AMP LMC7101BIM5 MOD AMP BUFFER DRIVE AMP DRIVE AMP DRIVE AMP Q606 HSM88AS-E D601 TXASSIST Q501...
Page 117 FINAL UNIT (X45-392) (C/3) N SYNC2 N_SYNC1_B N_SYNC1_A N_SYNC2_B N_SYNC2_A N_SYNC1_B N_SYNC1_A N_SYNC2_B N_SYNC2_A N SYNC1 CN101 CN43 RX ANT INT SP CN500 CN301 CN700 Ext IN CN39 CN802 IF_SIG CN201 MAIN DC CN701 CN203 – CN38 CN800 CONTROL UNIT TX-RX UNIT TMP1 TMP1...

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