Kenwood NX-411 Service Manual
Kenwood NX-411 Service Manual

Kenwood NX-411 Service Manual

900mhz digital transceiver
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900MHz DIGITAL TRANSCEIVER
NX-411
SERVICE MANUAL
Whip antenna
(KRA-38: option)
Badge
(B43-1606-04)
Knob (PTT)
(K29-9302-33)
Packing (18 key)
(G53-1823-11)
Does not come with antenna. Antenna is available
as an option.
GENERAL .................................................................. 2
SYSTEM SET-UP ....................................................... 3
REALIGNMENT ......................................................... 3
INSTALLATION .......................................................... 6
DISASSEMBLY FOR REPAIR ................................... 8
CIRCUIT DESCRIPTION ......................................... 12
COMPONENTS DESCRIPTION .............................. 19
PARTS LIST ............................................................. 21
EXPLODED VIEW .................................................... 31
PACKING ................................................................. 32
TROUBLE SHOOTING ............................................ 33
ADJUSTMENT ......................................................... 36
TERMINAL FUNCTION ........................................... 56
RoHS
This product complies with the
CONTENTS
directive for the European market.
© 2011-12 PRINTED IN JA PAN
B53-7002-00 ( Y ) 330
Knob (Selector)
(K29-9305-03)
Knob (Volume)
(K29-9304-03)
Main cabinet (18 key)
(A02-4076-11)
DISPLAY UNIT (X54-3770-10) ............................ 64
TX-RX UNIT (X57-8120-10) ................................ 68
INTERCONNECTION DIAGRAM ............................. 72
SCHEMATIC DIAGRAM .......................................... 74
BLOCK DIAGRAM .................................................. 86
LEVEL DIAGRAM ................................................... 89
KNB-32N (Ni-MH Battery Pack) ........................ 90
KNB-33L (Li-ion Battery Pack) ......................... 90
KNB-54N (Ni-MH Battery Pack) ........................ 90
KSC-32 (Rapid Charger) ................................... 90
KBP-6 (Battery Case) ........................................ 90
SPECIFICATIONS .................................................... 91
This product uses Lead Free solder.

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Summary of Contents for Kenwood NX-411

  • Page 1: Table Of Contents

    900MHz DIGITAL TRANSCEIVER NX-411 SERVICE MANUAL © 2011-12 PRINTED IN JA PAN B53-7002-00 ( Y ) 330 Whip antenna Knob (Selector) (KRA-38: option) (K29-9305-03) Knob (Volume) (K29-9304-03) Badge (B43-1606-04) Knob (PTT) (K29-9302-33) Main cabinet (18 key) (A02-4076-11) Packing (18 key) (G53-1823-11) Does not come with antenna.
  • Page 2: General

    Copyright 2011 by JVC KENWOOD Corporation. All The title to and ownership of copyrights for firmware rights reserved. embedded in Kenwood product memories are reserved for No part of this manual may be reproduced, translated, JVC KENWOOD Corporation. Any modifying, reverse en-...
  • Page 3: System Set-Up

    RF power Type License and frequency allocated by FCC RX 935~941 TX 896~902 2.5W NX-411 K2 935~941 Choose the type of transceiver A personal computer, programming interface (KPG-36A/36U), USB adapter (KCT-53U), and programming software Transceiver programming (KPG-111D: ver. 2.80 or later) are required for programming.
  • Page 4 NX-411 REALIGNMENT 5-2. Connection procedure 2. How to Enter Each Mode 1. Connect the transceiver to the computer using the inter- Mode Operation face cable and USB adapter (When the interface cable is User mode Power ON KPG-36A, the KCT-53U can be used.)
  • Page 5 NX-411 REALIGNMENT 6. Firmware Programming Mode 7. Clone Mode 6-1. Preface Programming data can be transferred from one transceiv- er to another by connecting them via their external universal Flash memory is mounted on the transceiver. This al- connectors. The operation is as follows (the transmit trans- lows the transceiver to be upgraded when new features are ceiver is the source and the receive transceiver is a target).
  • Page 6: Installation

    NX-411 REALIGNMENT Cloning cable (E30-3325-05) 5. Connect the cloning cable (part No. E30-3325-05) to the universal connectors on the source and target. 6. Press the [ ] key on the source while the source displays “CLONE MODE”. The data of the source is sent to the target.
  • Page 7 NX-411 INSTALLATION 4. Attach the cushion (G13-1974-04) to the VGS-1 as Note: shown in the fi gure. Be sure not to cover the spring part of the fl at spring with Note: the cushion. Be sure to not cover the VGS-1 connector with the cush- ion.
  • Page 8: Disassembly For Repair

    NX-411 DISASSEMBLY FOR REPAIR 1. Precautions for Waterproof • The orange packing material on the reverse side of the transceiver is important with respect to the waterproof ef- fi ciency of the transceiver. Do not place stickers or other materials on or around the packing material shown in the fi...
  • Page 9 NX-411 DISASSEMBLY FOR REPAIR ■ Inserting the rubber spacer (J30-1279-04) onto the rear panel 18-key part 1. Bend the two convex parts of the rubber spacer inward a , then fi t the sheet into the space b . Next, bend the one convex part of the rubber spacer in- ward c , and insert the sheet into the rubber spacer.
  • Page 10 NX-411 DISASSEMBLY FOR REPAIR ■ Forming the Cord ASSY ■ Correspondence when replacing the case Form the Cord ASSY according to the procedure shown (A02-4076-11) in the fi gure. Apply the dry-surf (410-0019-05) around the LCD and 18-key part of the case when replacing the case.
  • Page 11 Part Number Remark Sticker B42-7296-04 “NEXEDGE” is printed. Main Cabinet A02-4076-11 Badge B43-1606-04 “KENWOOD” is printed. Fibrous Sheet (SP) G10-1400-04 Used for fi xing the LCD ASSY on the Illumination Guide (LCD). LCD ASSY B38-0923-05 Adhesive Sheet (LCD) J99-0714-04 Also used for fi xing the Illumination Guide (LCD) on the Control Unit.
  • Page 12: Circuit Description

    CIRCUIT DESCRIPTION 1. Overview 2. Frequency Confi guration The NX-411 is an 900MHz Portable transceiver designed The receiver is a double-conversion superheterodyne us- to operate in the frequency range of 896 to 941MHz. ing the fi rst intermediate frequency (IF) of 58.05MHz and the The unit consists of receiver, transmitter, phase-locked second IF of 450kHz.
  • Page 13 NX-411 CIRCUIT DESCRIPTION 3-3. Audio Amplifi er Circuit and is then output to the internal speaker. While EXAMT is High, the AF switch (IC15) selects the external speaker, and Audio processing (high-pass filter, low-pass filter, de- the audio signal is fed to the external audio power amplifi er emphasis, etc.) at FM mode and decoding at NXDN mode...
  • Page 14 NX-411 CIRCUIT DESCRIPTION 4-2. Baseband Circuit 4. Transmitter System The audio signal from the audio band circuit is converted 4-1. Audio Band Circuit to digital data with a sampling frequency of 48kHz with ASIC The signal from the internal microphone goes through (IC309).
  • Page 15 NX-411 CIRCUIT DESCRIPTION 4-3. VOX 4-5. APC Circuit IC14 amplifies the audio signal captured in the micro- The APC circuit always monitors the current flowing phone. The signal is then converted into DC voltage, and is through the RF power amplifiers (Q604 and Q602) and rectifi...
  • Page 16 NX-411 CIRCUIT DESCRIPTION 5-3. PLL IC (IC503) 5-4. Doubler (Q509) The PLL IC compares the differences in phases of the The doubler (Q509) extracts the twice harmonic com- VCO oscillation frequency and the TCXO reference fre- ponent from the signal from the VCO. This twice harmonic...
  • Page 17 NX-411 CIRCUIT DESCRIPTION 6-5. Key Detection Circuit 6. Control Circuit Keys are detected using a key scan circuit in IC309. The /KEYI signals that are normally pulled down go high when The control circuit consists of the ASIC (IC309) and its any key is pressed.
  • Page 18 NX-411 CIRCUIT DESCRIPTION The SBC signal becomes High after the ASIC operates, 8. Signaling Circuit and IC204 (5A) and Q201 (SB2) are turned on. IC207 oper- 8-1. Encode (QT/DQT/LTR/DTMF/MSK) ates by turning on these AVR ICs and FET switches. Each signaling data signal of QT, DQT, LTR, DTMF and...
  • Page 19: Components Description

    NX-411 COMPONENTS DESCRIPTION Display unit (X54-3770-10) Ref. No. Part Name Description IC301,302 Bus switch (LCD) Ref. No. Part Name Description IC303 Flash memory IC102 LCD contrast IC304 IC105 Voltage doubling inverter IC305 SRAM D1~4 6key backlight IC306 Reset D5~10 12key backlight...
  • Page 20 NX-411 COMPONENTS DESCRIPTION Ref. No. Part Name Description Q601 Buffer AMP (TX) Q602 Drive AMP Q604 Final AMP Q605 DC switch Q606,607 Transistor DC switch Q608 DC switch Q609 Transistor DC switch Q610 Transistor Buffer AMP (TX) Q801 Transistor Buffer AMP (2nd Local)
  • Page 21: Parts List

    NX-411 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 NX-411 PARTS LIST DISPLAY UNIT (X54-3770-10) TX-RX UNIT (X57-8120-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R115 RK73HB1J104J CHIP R 100K 1/16W CC73HCH1H100B CHIP C 10PF R133...
  • Page 23 NX-411 PARTS LIST TX-RX UNIT (X57-8120-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C211 CC73GCH1H220J CHIP C 22PF C350-353 CK73HB1E104K CHIP C 0.10UF C212 CK73HB1A105K CHIP C 1.0UF...
  • Page 24 NX-411 PARTS LIST TX-RX UNIT (X57-8120-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C547 CK73HB1E104K CHIP C 0.10UF C673 CK73HB1E103K CHIP C 0.010UF C548 CS77CP0J100M CHIP TNTL 10UF 6.3WV...
  • Page 25 NX-411 PARTS LIST TX-RX UNIT (X57-8120-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C849 CC73HCH1H101J CHIP C 100PF L309 L92-0162-05 BEADS CORE C850 CC73HCH1H060B CHIP C 6.0PF...
  • Page 26 NX-411 PARTS LIST TX-RX UNIT (X57-8120-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation L817 L41-5165-45 SMALL FIXED INDUCTOR(5.1NH) RK73HB1J823J CHIP R L820 L79-1953-05 FILTER(938MHZ) RK73HB1J103J CHIP R...
  • Page 27 NX-411 PARTS LIST TX-RX UNIT (X57-8120-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R145 RK73HB1J102J CHIP R 1.0K R258 RK73HB1J472J CHIP R 4.7K R146 RK73HB1J332J CHIP R 3.3K...
  • Page 28 NX-411 PARTS LIST TX-RX UNIT (X57-8120-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R398 RK73HB1J105J CHIP R 1.0M R555 RK73HB1J104J CHIP R 100K R399-401 RK73HB1J102J CHIP R 1.0K...
  • Page 29 NX-411 PARTS LIST TX-RX UNIT (X57-8120-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R801 RK73HB1J470J CHIP R D9 -15 1SS416 DIODE R802 RK73HB1J100J CHIP R D16 ,17 EMZ6.8N...
  • Page 30 NX-411 PARTS LIST TX-RX UNIT (X57-8120-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation Q606 RT1N441U-T111 TRANSISTOR IC302 TC7WZ245FK-F MOS-IC Q607 2SC5383-T111 TRANSISTOR IC303 Note 1 ROM IC...
  • Page 31: Exploded View

    NX-411 EXPLODED VIEW Display unit (X54) TX-RX unit (X57 A/2) B : N09-2426-14 C : N09-6565-05 E : N14-0806-04 F : N14-0810-04 G : N19-2213-05 H : N30-2004-43 : N30-2604-48 Option : N83-2005-48 board unit K : N83-2006-43 (X57 B/2)
  • Page 32: Packing

    NX-411 PACKING 45 Packing fixture (H12-4282-02) Pamphlet Pamphlet 50 Belt clip (J29-0730-05) 14 Instruction manual (B62-2364-00) (B09-0625-03) A Dressed screw (N08-0548-24) D Pan head machine screw (N09-6585-05)x2 46 Item carton case 45 Packing fixture (H52-2485-02) (H12-4282-02) Parts with the exploded numbers larger than 700 are not supplied.
  • Page 33: Trouble Shooting

    NX-411 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 34 NX-411 TROUBLE SHOOTING When a normal ● Checking the output signal value is confirmed. from the ASIC When an abnormal value is confirmed. Points to be checked Normal voltage Remove R213. If the ASIC side is 0V, SBC R213 3.3V the ASIC/FLASH/SRAM may be broken.
  • Page 35 Use the KPG-110SM on the NXDN Trunking System side to reprogram the NXDN ESN number. • When a new printed circuit board is used, the Kenwood ESN changes, as does the Transceiver Information dis- play of the KPG-111D, but this does not have any effect on the operation of the transceiver.
  • Page 36: Adjustment

    NX-411 TROUBLE SHOOTING NXDN ESN Label (12 digits) (Not used) Kenwood ESN Label (Not used) Kenwood ESN Label Cut-off Line NXDN ESN Label (12 digits) MPT ESN Label (10 digits) MPT ESN Label (10 digits) Note: A UPC code and UPC barcode is not printed on the Ken- wood ESN Label.
  • Page 37 NX-411 ADJUSTMENT ■ Key operation • LED indicator Red LED Lights during transmission. “FNC” not appears on the sub LCD display Green LED Lights when there is carrier. Function Display • Sub LCD indicator [Selector] “FNC” Appears at function on.
  • Page 38 NX-411 ADJUSTMENT • Analog mode signaling Function Push Hold (1 second) None None [Selector] None 100Hz Square Wave Adjustment value up Continuation up LTR Data: LTR Data: Adjustment value down Continuation down AREA=0, GOTO=12 AREA=0, GOTO=12 [Side1] Auto adjustment start...
  • Page 39 NX-411 ADJUSTMENT ■ Adjustment item supplement Adjustment Item Description LCD Contrast The contrast of LCD display can be changed. “Counterclockwise Volume” is adjusted at the minimum volume position. Counterclockwise Volume “Clockwise Volume” is adjusted at the maximum volume position. These adjustments can correct the volume variation.
  • Page 40 NX-411 ADJUSTMENT ■ Adjustment item and Display An (Analog Narrow) Nn (NXDN Narrow) Nv (NXDN Very Narrow) Adjust item Adjusutment Main LCD Order Sub LCD display item display Number Adjustment range 1 point ADJ Common LCD Contrast CNTR Section 2...
  • Page 41 NX-411 ADJUSTMENT An (Analog Narrow) Nn (NXDN Narrow) Nv (NXDN Very Narrow) Adjust item Adjusutment Main LCD Order Sub LCD display item display Number Adjustment range - *1 (RSSI measurement Receiver Low RSSI LRSSI value) Section 4 1~256 - *1...
  • Page 42 NX-411 ADJUSTMENT Analog MAX Deviation 4 reference level Narrow ADEV Adjustments ] press ] hold 2 reference level QT Deviation Narrow Adjustments ] press ] hold 2 reference level DQT Deviation Narrow Adjustments ] press ] hold LTR Deviation 2 reference level...
  • Page 43 ■ Nut wrench In order to turn the volume nut and the channel selector nut, use a recommendation tool. Kenwood part No.: W05-1123-00 ■ Battery jig (W05-1513-00) Connect the power cable properly between the battery jig installed in the transceiver and the power supply, and...
  • Page 44 NX-411 ADJUSTMENT ■ Universal connector Use the interface cable (KPG-36A/36U) for PC tuning or BLU (7) To transceiver PTT SW the lead wire with plug (E30-3287-28) and screw (N08-0535- 08) for panel tuning. Connect the plug to the universal con- BRN (10) nector of the transceiver and tighten the screw.
  • Page 45 NX-411 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 ANT Check 899.049101~...
  • Page 46 NX-411 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 47 NX-411 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 5. Receive 1) Adj item: [RAST] 1) Adj item: Panel [Panel The sub LCD 2.8V±0.1V Assist Adjust: [...
  • Page 48 NX-411 ADJUSTMENT Transmitter Section Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 1. High 1) Adj item: [HIPWR] 1) Adj item: [High Power Panel ANT Panel [Panel 2.5W...
  • Page 49 NX-411 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Method Unit Terminal Unit Parts equipment 4. Maximum 1) Adj item: [Nn NDEV] 1) Adj item: [Maxi- Deviation Panel ANT Panel [Panel 3056Hz...
  • Page 50 NX-411 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 6. QT 1) Adj item: [An QT] 1) Adj item: [QT Deviation Panel ANT Panel [Panel Write the value as 0.35kHz±0.05kHz...
  • Page 51 NX-411 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 10. MSK 1) Adj item: [An MSK] 1)Adj item: [MSK Deviation Panel ANT Panel [Panel Write the value as 1.50kHz±0.05kHz...
  • Page 52 NX-411 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 14. Battery 1) Adj item: [BATT] 1) Adj item: [Battery Power Panel ANT Press the PTT Warning Level...
  • Page 53 NX-411 ADJUSTMENT ■ 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 (Analog Narrow)”, this signaling is composed of three elements [Balance, Maximum Deviation (Analog Narrow) and QT Deviation (Analog Narrow)].
  • Page 54 NX-411 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 ANT Panel Volume Turn the Volume 0.63V±0.1V...
  • Page 55 NX-411 ADJUSTMENT Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 4. Low 1) Adj item: [An LRSSI] 1) Adj item: [Low RSSI Panel ANT [Panel tuning mode]...
  • Page 56: Terminal Function

    NX-411 TERMINAL FUNCTION Display unit (X54-3770-10) Pin No. Name Function Pin No. Name Function I/O Data bus 6 No connection Chip select output I/O Data bus 7 /RES LCD reset output No connection Address bus 0 output LCDCNT LCD contrast input...
  • Page 57 NX-411 TERMINAL FUNCTION Pin No. Name Function Pin No. Name Function No connection BTL output – for internal speaker I/O Data bus 7 BTL output + for internal speaker No connection LCDCNT LCD contrast output Key matrix input (SIDE1 key)
  • Page 58 NX-411 TERMINAL FUNCTION Option board unit (X57-8120-10 B/2) Pin No. Name Function CN321 Pin No. Name Function CN923 OPT1 OPT1 OPT3 26P_RD OPT3 26P_RD 26P_TD 26P_TD OPT4 OPT4 OPT10 OPT10 OPT5 OPT5 DGND DGND AGND AGND Refer to “CN321 26-pin connector AGND specifi...
  • Page 59 NX-411 TERMINAL FUNCTION Universal connector Rating and Condition Signal Pin No. Name I/O Function Type Parameter Unit EXT/INT speaker switch input Digital L: External speaker ON H: Internal speaker ON [8 load] Max output power (1kHz, Batt=7.5V) Analog BTL output + for external speaker [8...
  • Page 60 NX-411 TERMINAL FUNCTION CN321 26-pin connector specifi cation Rating and Condition Pin No. Name Signal Type Parameter Unit OPT1 [Input] VIH OPT4 [Input] VIL OPT5 Digital [Output] VOH OPT8 [Output] VOL OPT11 OPT3 [Input] VIH OPT7 [Input] VIL Digital OPT2...
  • Page 61 NX-411 TERMINAL FUNCTION Rating and Condition Pin No. Name Signal Type Parameter Unit Output Amplitude (1kHz, 60% deviation) mVp-p Coupling Capacitor µF RXEO Analog  Output Impedance 2.2k Allowable Frequency 3000 Input Amplitude (1kHz, 60% deviation) mVp-p Coupling Capacitor µF...
  • Page 62 NX-411 TERMINAL FUNCTION Pin No. Name Device Connection Function ANI board 26P_TD VGS-1 Serial data output ANI board PTT signal output OPT4 VGS-1 Enable ANI board OPT10 VGS-1 USEL UART speed select output ANI board Emergency Emergency signal output OPT5...
  • Page 63 NX-411 TERMINAL FUNCTION CN923 Option board connector specifi cation Pin No. Name Device Connection Function [COR] Conv/LTR L: Activity receiving H: Not activity receiving [TOR] Conv/LTR L: Activity receiving (Sub Tone or LTR ID is OK) OPT1 ANI board Aux Output...
  • Page 64: Pc Board

    NX-411 PC BOARD DISPLAY UNIT (X54-3770-10) Component side view (J79-0245-29) Ref. No. Address Ref. No. Address...
  • Page 65 NX-411 PC BOARD DISPLAY UNIT (X54-3770-10) Component side view (J79-0245-29) J79-0245-29 /RES Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side...
  • Page 66 NX-411 PC BOARD DISPLAY UNIT (X54-3770-10) Foil side view (J79-0245-29) J79-0245-29 TH101 R112 R115 IC102 C119 C122 C133 C138 C137 C125 Ref. No. Address Ref. No. Address IC102 IC105...
  • Page 67 NX-411 PC BOARD DISPLAY UNIT (X54-3770-10) Foil side view (J79-0245-29) Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side...
  • Page 68: Tx-Rx Unit (X57-8120-10)

    NX-411 PC BOARD TX-RX UNIT (X57-8120-10) (A/2) Component side view (J79-0303-09 A/2) IC22 C842 R164 C122 IC20 IC21 R170 C136 C250 Q209 R167 R165 R175 R166 R157 R176 Q211 R158 R142 IC18 C137 C106 IC19 C108 R177 R143 R173 R529...
  • Page 69 NX-411 PC BOARD TX-RX UNIT (X57-8120-10) (A/2) Component side view (J79-0303-09 A/2) IC202 C396 IC803 C842 L203 C213 R387 C405 X302 C404 C205 C402 R343 R429 C372 L315 L317 C383 C340 L310 L313 IC203 R437 C384 C373 Q210 IC210 C336...
  • Page 70 NX-411 PC BOARD TX-RX UNIT (X57-8120-10) (A/2) Foil side view (J79-0303-09 A/2) R805 R421 R414 R422 R383 C375 L319 R501 R808 C825 R502 R806 C808 C833 C822 C817 L804 C820 CN321 C832 R809 R509 C816 C805 C506 R415 R390 C815...
  • Page 71 NX-411 PC BOARD TX-RX UNIT (X57-8120-10) (A/2) Foil side view (J79-0303-09 A/2) R805 R836 L806 R867 C838 Q802 R835 C895 Q804 C834 R832 C836 R838 XF801 R820 L817 C874 L820 C880 R866 L824 L807 R868 C831 C849 C909 C828 C844...
  • Page 72: Interconnection Diagram

    NX-411 INTERCONNECTION DIAGRAM OPTION PC X57-812 B/2 LCD ASSY CORD ASSY CN301 X42-334 /LCDRST /LCDRST VLCDLED VLCDLED VLCDLED VLCDLED DISPLAY UNIT X54-377 LCDCNT LCDCNT KEYO1 KEYO1 KEYO0 KEYO0 KEYO3 KEYO3 KEYO2 KEYO2 /KEYI1 /KEYI1 /KEYI0 /KEYI0 /KEYI3 /KEYI3 /KEYI2 /KEYI2...
  • Page 73 NX-411 INTERCONNECTION DIAGRAM TION PCB 7-812 B/2 SIDE KEY SECTION DLED DLED Side_G S201 AUX SW UNIVERSAL CONNECTOR TX-RX UNIT X57-812 A/2 BATT –...
  • Page 74: Schematic Diagram

    NX-411 SCHEMATIC DIAGRAM LCD ASSY(B38-0923-05) DISPLAY UNIT(X54-3770-10) D15-18 LCD BACKLIGHT R16 10k R17 10k R18 10k R19 10k R20 10k R21 10k /LCDRST R22 10k R23 10k 0.1u VLCDLED D1-4 D5-10 6KEY BACKLIGHT 12KEY BACKLIGHT LCDCNT D11-14 12KEY CONTROL 1SS388F...
  • Page 75 NX-411 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8120-10) (A/2) R447 PLL_MOD /LCDRST /CS4 33MDSP IC302 BUS SWITCH CN301 TC7WZ245FK-F (LCD) /LCDRST C326 /WR_50 C328 0.1u VLCDLED C321 47p BUS SWITCH IC301 (LCD) TC74LCX245FK D[15] D[14] D[13] D[12] D[11] D[10] D[9] D[8] D[7]...
  • Page 76 NX-411 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8120-10) (A/2) PLL_MOD 33MDSP 33MDSP Main_CLK ASQDET Main_CLK XTALI XTALO R370 0 CN303 DSPCK /RINT GPIo0 USRCKI GPIo1 ADD0 GPIo2 ADD1 GPIo3 R305 ADD2 GPIo4 /MCCSXCN ADD3 R432 GPIo5 ADD4 CN323 100k GPIo6 MCSCKCN ADD5...
  • Page 77 NX-411 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8120-10) (A/2) IC310 BUFFER AMP (18.432MHz) R373 Main_CLK L315 33AA C389 0.01u C390 1u C391 0.1u C392 0.1u C393 0.1u DGND3 DGND2 33MC C394 0.1u DGND1 DVDIo7 C382 0.01u DVDIo6 DVDIo5 C383 1u DVDIo4 C384 0.1u DVDIo3 C385 0.1u...
  • Page 78 NX-411 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8120-10) (A/2) 6 7 8 9 10 9 10 6 7 8 VCO_MOD R151 ASQ CN3 HSC119 R115 EVRST ASQDET /EVCS R121 100k W_/N SCK0 REVERSE SDO0 ASQAPC C96 47p CURRENT R125 PREVENTION APC/ASQ SMF...
  • Page 79 NX-411 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8120-10) (A/2) VCO_MOD VCO_MOD R18 0 /SCSW LOGIC SWITCH (AF) RXAF SMF C21 0.1u OP AMP (AF) TC75S51FE(F) TC7W53FK(F) IC10 TC75W51FK(F) 1000p IN+B RXAF IN-B IN+A CoMMoN oUTB IN-A OP AMP (AF) 100k oUTA C17 220p C36 0.01u...
  • Page 80 NX-411 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8120-10) (A/2) VCO_MOD VCO_MOD REVERSE CURRENT PREVENTION R144 R163 HSC119 LOGIC SWITCH (AF) SP AMP R162 100k C91 0.01u OP AMP (AF) IC13 IC15 IC19 TC75S51FE(F) TC7W66FK-F TPA6201A1DRBR SHUTDoWN IN_oUT1 C108 BYPASS oUT_IN1 CoNT1 0.1u 0.1u...
  • Page 81 NX-411 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8120-10) (A/2) 5 6 7 8 5 6 7 8 VCO_MOD VCO_MOD AVR (50C) IC205 TK11250CUCB R211 5.02V S_DET VoUT IC207 TK71733S CN202 3.87V 3.27V CoNT R220 VoUT F201 2.5A L208 7.47V oN/oFF NP/VREF PROTECT of...
  • Page 82 NX-411 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8120-10) (A/2) VCO_MOD Q207 DC SWITCH D209 SPEED UP 5.02V Q207 OP AMP (50T) 4.94V DIODE 2SA1955A-F IC208 : 3.20V TC75S51FE(F) D209 HSC119 R239 C539 R533 5.02V REVERSE 4.23V R250 CURRENT PREVENTION OP AMP 4.26V 3.3V...
  • Page 83 NX-411 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8120-10) (A/2) Q507 L516 R561 BUFFER AMP 270n (CV) CN501 D507,508,510,512 0.71V R545 RX VCO VCO (FREQUENCY CONTROL) 0.71V 3.84V C567 4.12V R 1.13V Q502 3.90V 4.12V 1.13V 2SK879-F(Y) L505 D507 D508 C553 L511 R543...
  • Page 84 NX-411 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8120-10) (A/2) BUFFER AMP (TX) L604 L620 C624 C629 Q601 R621 T 0.96V 6.8n 1.5n 100p 2SK3077F L601 5.6n BUFFER AMP (TX) R676 3.9k : 0V 1.36V Q610 L618 2SC5636 8.2n R612 3.3k C579 100p L521 R : 4.58V...
  • Page 85 NX-411 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8120-10) (A/2) TH601 C709 L622 CN601 100k 100p FINAL : 0V R 0V 1.92V T 1.12V D605 6.63V Q604 L615 RD07MUS2BT122 6.90V HVC131 R663 L79-1468-05 H 6.55V C687 C694 C698 C705 C706 0.78V 6.91V 100p...
  • Page 86: Block Diagram

    NX-411 BLOCK DIAGRAM TX-RX unit (X57-8120-10) (A/2) Q503 2SC5383-T111 I2CCK I2CSDA Ripple Filter IC502 Q505 SSM6L05FU-F LM73CIMKX-0 X302 IC310 Q506 2SJ347F 18.432MHz IC503 SM5023CNDH-G Temp. Sensor SKY72310-362 /SCRST,SCSCK,/ TCXO SCREQ,SCBSY,SCMOSI,SCBCK, /SCSS,SCMISO,/SCWKUP,/SCBFS Loop BUFF Filter TCXO IC303 IC305 Q508 Q502 X501 19.2MHz...
  • Page 87 NX-411 BLOCK DIAGRAM TX: 896 902MHz RX,TX(TA): 935 941MHz D605,606,607,608 Q509 Q510 D513,D601 Q610 Q601 Q602 Q604 HVC131*4 2SC5636 2SC5636 RN142S*2 2SC5636 2SK3077F RD01MUS1-T113 RD07MUS2BT112 Q607 2SC5383-T111 Pre- BUFF BUFF Drive Final ×2 Drive Q508 2SC5636 MCH3914(8)-H 09 HVC350B Q609...
  • Page 88 NX-411 BLOCK DIAGRAM Display unit (X54-3770-10) D0~D7 /WR,/LCDRST LCDCNT IC102 NJM2130F3-ZB -10V DCDC IC105 LM2682MMX KEYO 0,1,2,3 KEY Matrix /KEYI 0,1,2,3,4 (6key+12key) 12key Back Light VKEY D5,6,7,8 D9,10 LCD Back Light VLCDLED D15,16 D17,18 6key Back Light D1,2 D3,4 INTMIC...
  • Page 89: Level Diagram

    NX-411 LEVEL DIAGRAM...
  • Page 90: Optional Accessories

    NX-411 OPTIONAL ACCESSORIES KNB-32N (Ni-MH Battery Pack): 7.2V 2500mAh KNB-54N (Ni-MH Battery Pack): 7.2V 2500mAh ■ External View ■ External View ■ Schematic Diagram ■ Schematic Diagram Discharging terminals Discharging terminals – –   150k 150k – – Charging terminals Charging terminals KNB-33L (Li-ion Battery Pack): 7.4V 2000mAh...
  • Page 91: Specifications

    Audio Distortion ..........Less than 3% Modulation ............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 92 NX-411...
  • Page 93 NX-411 NX-411 PC BOARD PC BOARD DISPLAY UNIT (X54-3770-10) DISPLAY UNIT (X54-3770-10) Component side view (J79-0245-29) Component side view (J79-0245-29) J79-0245-29 /RES Component side Ref. No. Address Ref. No. Address Layer 1 Layer 2 Layer 3 Layer 4 Foil side...
  • Page 94 NX-411 NX-411 PC BOARD PC BOARD DISPLAY UNIT (X54-3770-10) DISPLAY UNIT (X54-3770-10) Foil side view (J79-0245-29) Foil side view (J79-0245-29) J79-0245-29 TH101 R112 R115 IC102 C119 C122 C133 C138 C137 C125 Component side Ref. No. Address Ref. No. Address Layer 1...
  • Page 95 NX-411 NX-411 PC BOARD PC BOARD TX-RX UNIT (X57-8120-10) (A/2) TX-RX UNIT (X57-8120-10) (A/2) Component side view (J79-0303-09 A/2) Component side view (J79-0303-09 A/2) IC202 C396 IC803 IC22 C842 L203 C213 R164 C122 IC20 IC21 R170 C136 R387 C250 Q209...
  • Page 96 NX-411 NX-411 PC BOARD PC BOARD TX-RX UNIT (X57-8120-10) (A/2) TX-RX UNIT (X57-8120-10) (A/2) Foil side view (J79-0303-09 A/2) Foil side view (J79-0303-09 A/2) R805 R421 R414 R422 R383 C375 L319 R836 L806 C838 R867 R501 R808 C825 Q802 R835...
  • Page 97 LCD ASSY(B38-0923-05) TX-RX UNIT (X57-8120-10) (A/2) R447 IC310 6 7 8 9 10 9 10 6 7 8 5 6 7 8 5 6 7 8 TH601 C709 L622 PLL_MOD PLL_MOD BUFFER AMP (18.432MHz) VCO_MOD VCO_MOD VCO_MOD VCO_MOD VCO_MOD VCO_MOD VCO_MOD VCO_MOD 100k...
  • Page 98 TX-RX unit (X57-8120-10) (A/2) Q503 2SC5383-T111 TX: 896~902MHz I2CCK I2CSDA Ripple RX,TX(TA): Filter 935~941MHz IC502 Q505 SSM6L05FU-F LM73CIMKX-0 D605,606,607,608 X302 IC310 Q506 2SJ347F Q509 SM5023CNDH-G 18.432MHz IC503 Q510 D513,D601 Q610 Q601 Q602 Q604 HVC131*4 Temp. Sensor SKY72310-362 2SC5636 2SC5636 RN142S*2 2SC5636 2SK3077F RD01MUS1-T113...
  • Page 99 OPTION PCB X57-812 B/2 LCD ASSY SIDE KEY SECTION CORD ASSY CN301 X42-334 /LCDRST /LCDRST VLCDLED VLCDLED VLCDLED VLCDLED Side_G S201 AUX SW UNIVERSAL DISPLAY UNIT CONNECTOR TX-RX UNIT X54-377 X57-812 A/2 LCDCNT LCDCNT KEYO1 KEYO1 KEYO0 KEYO0 KEYO3 KEYO3 KEYO2 KEYO2 /KEYI1...

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