Kenwood NX-320 Series Service Manual
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Kenwood NX-320 Series Service Manual

Uhf digital transceiver kenwood nx-320 series
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UHF DIGITAL TRANSCEIVER
NX-320
SERVICE MANUAL
NX-320 K,K4,E3
Helical antenna
(KRA-23: Option)
Knob (Selector)
(K29-9486-03)
Knob (Volume)
(K29-9485-03)
Knob (PTT)
Plastic cabinet assy
(K29-9500-03)
(A02-4130-03)
Button knob
(Side1/Side2/AUX)
(K29-9501-03)
Does not come with antenna.
Antenna is available as an option.
RoHS
This product complies with the
NX-320 K2,K5,E2
Helical antenna
(KRA-23: Option)
Knob (Selector)
(K29-9486-03)
Knob (PTT)
(K29-9500-03)
Button knob
Packing (4Key)
(Side1/Side2/AUX)
(G53-1864-01)
(K29-9501-03)
directive for the European market.
© 2011-3 PRINTED IN JA PAN
B51-8963-00 ( N ) 455
NX-320 K3,K6,E
Helical antenna
(KRA-23: Option)
Knob (Volume)
(K29-9485-03)
Plastic cabinet assy
Knob (PTT)
(A02-4131-03)
(K29-9500-03)
Button knob
(Side1/Side2/AUX)
(K29-9501-03)
Knob (Selector)
(K29-9486-03)
Knob (Volume)
(K29-9485-03)
Plastic cabinet assy
(A02-4132-03)
Packing (16Key)
(G53-1865-01)
This product uses Lead Free solder.

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Summary of Contents for Kenwood NX-320 Series

  • Page 1 UHF DIGITAL TRANSCEIVER NX-320 SERVICE MANUAL © 2011-3 PRINTED IN JA PAN B51-8963-00 ( N ) 455 NX-320 K,K4,E3 NX-320 K2,K5,E2 NX-320 K3,K6,E Helical antenna Helical antenna Helical antenna (KRA-23: Option) (KRA-23: Option) (KRA-23: Option) Knob (Selector) Knob (Selector) Knob (Selector) (K29-9486-03) (K29-9486-03) (K29-9486-03)

  • Page 2: Table Of Contents

    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.

  • Page 3: General

    NX-320 GENERAL INTRODUCTION PERSONAL SAFETY SCOPE OF THIS MANUAL The following precautions are recommended for personal safety: This manual is intended for use by experienced techni- • DO NOT transmit until all RF connectors are verifi ed se- cians familiar with similar types of commercial grade com- cure and any open connectors are properly terminated.

  • Page 4: System Set-Up

    NX-320 SYSTEM SET-UP Merchandise received Type Frequency range (MHz) RF power LCD 4-key DTMF keypad NX-320 K TX/RX 450~520 NX-320 K2 TX/RX 450~520 License and frequency allocated by FCC NX-320 K3 TX/RX 450~520 NX-320 K4 TX/RX 400~470 Choose the type of transceiver NX-320 K5 TX/RX 400~470 NX-320 K6...

  • Page 5: Realignment

    NX-320 REALIGNMENT 1. Modes 5. PC Mode 5-1. Preface User mode The transceiver is programmed by using a personal com- puter, programming interface (KPG-22A/22U), USB adapter Panel test mode *1 Panel tuning mode *1 (KCT-53U) and programming software (KPG-141D). The programming software can be used with a PC. Fig- PC mode Data programming mode ure 1 shows the setup of a PC for programming.

  • Page 6: Clone Mode

    NX-320 REALIGNMENT 2. When the POWER is switched on, you can immediately 6-3. Programming enter user mode. When the PC sends a command, the 1. Start up the firmware programming software (Fpro.exe transceiver enters PC mode, and “PROGRAM” is dis- (ver.
  • Page 7 NX-320 REALIGNMENT 2. When you enter the correct password, and “CLONE” 7. The other target can be continuously cloned. When the is displayed, the transceiver can be used as the cloning [ ] key on the source is pressed while the source displays source.

  • Page 8: Disassembly For Repair

    NX-320 DISASSEMBLY FOR REPAIR ■ Removing the mechanical stopper (without LCD 1. Precautions for Disassembly models only) ■ Removing the selector knob and volume knob 1. Pick up and lift the tab of a mechanical stopper using a 1. Using a thin tool, insert it in the hole on the selector knob pair of tweezers.
  • Page 9 NX-320 DISASSEMBLY FOR REPAIR ■ Removing the speaker holder 2. Precautions for Reassembly There is a space of approximately 1mm (0.04 inch) be- ■ Apply the bond to the inside of the selector tween the center part of the front glass of the speaker circle nut and volume circle nut holder and the surface of the Display unit.
  • Page 10 NX-320 DISASSEMBLY FOR REPAIR ■ Forming the fl at cable Note: Refer to page 8 for how to install the channel se- lector knob and knob spring. Form the right and left end of the fl at cable as shown in the fi...
  • Page 11 NX-320 DISASSEMBLY FOR REPAIR ■ Assembly information (Sheet/Cushion) When “Main Parts” is changed (ordered), “Assembled Sheet/Cushion” should also be changed (ordered) together. The Sticker and Sheet etc are non-reusable parts. It requires the new one to get the radio’s performance after repairs. For example, when “Plastic Cabinet Assy (A02-4130-03 (without key)/A02-4131-03 (4-key)/A02-4132-03 (16-key))”...

  • Page 12: Circuit Description

    NX-320 CIRCUIT DESCRIPTION 1. Overview 2. Frequency Confi guration The NX-320 is a UHF portable transceiver designed to The receiver is a double-conversion superheterodyne operate in the frequency range of 450 to 520MHz (K,K2,K3) using the first intermediate frequency (IF) of 49.95MHz or 400 to 470MHz (K4,K5,K6,E,E2,E3).
  • Page 13 NX-320 CIRCUIT DESCRIPTION 3-2. IF circuit 3-3. Audio amplifi er circuit The fi rst IF signal is passed through a four-pole monolithic Audio processing (high-pass filter, low-pass filter, de- crystal fi lter (XF1) to reject adjacent channel signals. The fi l- emphasized and so on) at FM mode and decoding at NXDN tered fi...
  • Page 14 NX-320 CIRCUIT DESCRIPTION 4-3. VOX 4-5. APC circuit The DSP detects the audio level. If the detected level be- The APC circuit always monitors the current flowing comes higher than the threshold level, the VOX starts. through the RF power amplifi er (Q104) and keeps a constant current.
  • Page 15 NX-320 CIRCUIT DESCRIPTION When the frequency is controlled by the PLL, the fre- The modulation signal is digital data of a sampling fre- quency convergence time increases as the frequency differ- quency of 96kHz set for the PLL IC by the DSP (IC603) ence increases when the set frequency is changed.
  • Page 16 NX-320 CIRCUIT DESCRIPTION 6-3. LCD 7. Power Supply Circuit The LCD is controlled using the 4 serial lines (SDI0, / The battery voltage (+B) is provided from the battery LCDCS, SCK0, SDO0) from the ASIC (IC610). terminal on the TX-RX unit (X57). The battery voltage passes through the 2.5A fuse (F1), and goes to the RF fi...
  • Page 17 NX-320 CIRCUIT DESCRIPTION TX-RX unit Final AMP, APC 2.5A Q902 AFPA 1.0A IC902 2-pin Jack VOL/SW /PSW /BINT IC507 5.6V Det IC506 IC501 ASIC IC610 IC502 IC503 DSP, FLASH, SRAM IC505 PLL, TCXO IC504 IC509 ASSIST 100C Q505 TX circuit Q503 RX circuit Q501...

  • Page 18: Components Description

    NX-320 COMPONENTS DESCRIPTION Display unit (X54-3760-XX) Ref. No. Part Name Description Ref. No. Part Name Description IC609 Buffer (Clock) ASQ BPF IC610 ASIC AF LPF/MIC amplifi er IC611,612 AND gate (2 input) D/A converter IC613 Motion sensor VCO MOD/VREF IC901 AF power amplifi...
  • Page 19 NX-320 COMPONENTS DESCRIPTION Ref. No. Part Name Description Ref. No. Part Name Description Variable capaci- D412,413 Diode T/R switch D201~204 BPF tune tance diode D414 Diode Speed up Variable capaci- D206,207 BPF tune Variable capaci- tance diode D415 Assist tune tance diode D401 Diode...

  • Page 20: Parts List

    NX-320 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. C : China X : Australia M : Oth er Areas...
  • Page 21 NX-320 PARTS LIST DISPLAY UNIT (X54-3760-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation CK73HB1H122K CHIP C 1200PF CP14 RK74HA1J102J CHIP-COM 1.0K 1/16W K6,E,E2 C33,34 CC73HCH1H470J CHIP C 47PF RK73HB1J472J CHIP R...
  • Page 22 NX-320 PARTS LIST DISPLAY UNIT (X54-3760-XX) TX-RX UNIT (X57-8050-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R83,84 RK73HB1J000J CHIP R 1/16W K3,K6,E C124 CC73HCH1H270G CHIP C 27PF K4,K5,K6 RK73HB1J000J CHIP R...
  • Page 23 NX-320 PARTS LIST TX-RX UNIT (X57-8050-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C175 CK73HB1A104K CHIP C 0.10UF C249 CC73HCH1H180G CHIP C 18PF E,E2,E3 C177 CK73HB1H471K CHIP C 470PF C251 CC73HCH1H1R5B...
  • Page 24 NX-320 PARTS LIST TX-RX UNIT (X57-8050-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C416-420 CC73HCH1H101J CHIP C 100PF C476 CK73HB1H471K CHIP C 470PF K,K2,K3 C421 CK73HB1A104K CHIP C 0.10UF C476-478 CK73HB1H471K...
  • Page 25 NX-320 PARTS LIST TX-RX UNIT (X57-8050-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C558 CK73GB0J106K CHIP C 10UF C910 CK73GB1E105K CHIP C 1.0UF C599 CK73HB1H471K CHIP C 470PF C913 CK73GB1E105K...
  • Page 26 NX-320 PARTS LIST TX-RX UNIT (X57-8050-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation L307 L40-1591-86 SMALL FIXED INDUCTOR (1.5UH) CP501 RK74HB1J104J CHIP-COM 100K 1/16W L308 L92-0138-05 CHIP FERRITE CP601 RK74HB1J104J CHIP-COM 100K...
  • Page 27 NX-320 PARTS LIST TX-RX UNIT (X57-8050-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R205 RK73HB1J221J CHIP R 1/16W K4,K5,K6 R408,409 RK73HB1J102J CHIP R 1.0K 1/16W R205 RK73HB1J221J CHIP R 1/16W E,E2,E3...
  • Page 28 NX-320 PARTS LIST TX-RX UNIT (X57-8050-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R504 RK73HB1J222J CHIP R 2.2K 1/16W R659 RK73HB1J563J CHIP R 1/16W R505 RK73HH1J184D CHIP R 180K 1/16W R660...
  • Page 29 NX-320 PARTS LIST TX-RX UNIT (X57-8050-XX) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation IC504 XC6209B502P-G MOS-IC IC505 XC6209B332M-G MOS-IC IC506 LT1616ES6-PBF ANALOGUE IC IC507 XC61CC5602N-G MOS-IC IC509 TC7W53FK(F) MOS-IC IC601...

  • Page 30: Exploded View

    NX-320 EXPLODED VIEW 16 (K,K4,E3) 3 (K3,K6,E) MIC1 (C/3) K2,K3,K5,K6,E,E2 K2,K5,E2 K,K4,E3 Display unit (A54-376 A/3) Fx10 TX-RX unit (X57-805) S101 X54 (B/3) A : N09-2438-05 46x2 B : N09-6608-05 C : N14-0864-04 D : N14-0865-04 E : N30-3006-43 F : N83-2005-48 Parts with the exploded numbers larger than 700 are not supplied.

  • Page 31: Packing

    NX-320 PACKING 52 Belt clip (J29-0701-15) 7 Cap (B09-0686-03) 16 Stopper (16CH) (D32-0454-04): K2,K3,K5,K6,E,E2 49 Holder (J19-5483-23) 47 Packing fixture (H12-4312-02) 708 Pamphlet 13 Instruction manual (B62-2292-00): K,K2,K3,K4,K5,K6 14 Instruction manual (B62-2319-00): E,E2,E3 48 Item carton case (H52-2454-02): K,K2,K3,K4,K5,K6 Parts with the exploded numbers larger than 700 are not supplied.

  • Page 32: Trouble Shooting

    NX-320 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 33 NX-320 TROUBLE SHOOTING ● The LCD displays control *1 When an abnormal value is confirmed. Points to be checked Normal voltage If the /LCDCS is 0V or 3.3V, the ASIC/FLASH/SRAM may be broken. /LCDCS R667 3.3V→0V→3.3V When a normal value is confirmed. The LCD does not function even if it is exchanged with the Display unit.
  • Page 34 Trunking System following the new ESN. of the Service TX-RX unit (X57-8050-12/X57-8050-13) and • When a new printed circuit board is used, the Kenwood the schematic diagram of the original TX-RX unit (X57- ESN changes, as does the Transceiver Information display 8050-10/X57-8050-11).

  • Page 35: Adjustment K Type

    NX-320 ADJUSTMENT (K TYPE) Controls “ ” not appears on the LCD display Function Display Power switch/ Selector Volume Use as the DTMF keypad. [0] to [9] If a key is pressed during transmission, the DTMF [#], [ ] corresponding to the key that was presses is sent.
  • Page 36 NX-320 ADJUSTMENT (K TYPE) ■ Frequency and Signaling Panel Tuning Mode The transceiver has been adjusted for the frequencies (K2,K3,K5 and K6 models only) shown in the following table. When required, readjust them ■ Transceiver tuning (To enter tuning mode) following the adjustment procedure to obtain the frequen- To enter tuning mode, press the [ ] key while the trans- cies you want in actual operation.
  • Page 37 NX-320 ADJUSTMENT (K TYPE) ■ Adjustment item supplement Adjustment Item Description “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. Both “Counterclockwise Volume” and “Clockwise Volume” must be adjusted. Clockwise Volume (The curve data of volume is applied.) The lock voltage of VCO (Receive) is adjusted.
  • Page 38 NX-320 ADJUSTMENT (K TYPE) ■ Adjustment item and Adjustment range NV (NXDN Very Adjusutment Panel Adjust item (Analog Wide) (Analog Narrow) (NXDN Narrow) Narrow) Order item tuning test Number Adjustment range 1 point ADJ Counterclockwise Common ✓ ✓ Volume Section 2 1~256 1 point ADJ Common...
  • Page 39 NX-320 ADJUSTMENT (K TYPE) NV (NXDN Very Adjusutment Panel Adjust item (Analog Wide) (Analog Narrow) (NXDN Narrow) Narrow) Order item tuning test Number Adjustment range - *1 Receiver ✓ ✓ Low RSSI Section 6 1~256 - *1 Receiver ✓ ✓ High RSSI Section 7 1~256...
  • Page 40 NX-320 ADJUSTMENT (K TYPE) ] hold [Side2] DTMF Deviation DTMF Deviation Narrow Wide DTMF DTMF ] press ] hold [Side2] Single Tone Deviation Single Tone Deviation Wide Narrow TONE TONE ] press ] hold [Side2] MSK Deviation MSK Deviation Narrow Wide ] press ] hold...
  • Page 41 ■ Nut wrench In order to turn the volume nut and the channel selector nut, use a recommendation tool. + Terminal (Red) KENWOOD part No.: W05-1123-00 – Terminal (Black) ■ Battery Jig (W05-0909-00) Connect the power cable properly between the battery...
  • Page 42 NX-320 ADJUSTMENT (K TYPE) F1: 450~520MHz (K,K2,K3) Radio Check Section F2: 400~470MHz (K4,K5,K6) 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.
  • Page 43 NX-320 ADJUSTMENT (K TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel test mode PC test mode Unit Terminal Unit Parts Method equipment 4. MIC 1) CH-Sig: 1-1 1) Test Channel Deviation Panel Adjust AG input 12.5mV±5.8mV sensitivity AG: 1kHz Channel: 1 meter...
  • Page 44 NX-320 ADJUSTMENT (K TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 4. Receive * This adjustment can [Manual Adjustment] Panel [PC test [PC test mode] 2.5V±0.1V Assist be performed only 1) Adj item: [Receive...
  • Page 45 NX-320 ADJUSTMENT (K TYPE) 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: [HPWR] 1) Adj item: [High Power meter Panel Panel [Panel 5.0W...
  • Page 46 NX-320 ADJUSTMENT (K TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment Maximum 1) Adj item: [NDEV] 1) Adj item: [Maximum Deviation Panel Panel [Panel 1337Hz 1311~1363Hz Deviation Adjust: [✳✳✳✳] Deviation (NXDN...
  • Page 47 NX-320 ADJUSTMENT (K TYPE) 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: [QT] 1) Adj item: [QT Deviation Panel Panel [Panel Write the value as 0.35kHz±0.05kHz Deviation Adjust: [✳✳✳✳.]...
  • Page 48 NX-320 ADJUSTMENT (K TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 9. DTMF 1) Adj item: [DTMF] 1) Adj item: [DTMF Deviation Panel Panel [Panel Write the value as 1.25kHz±0.05kHz Deviation Adjust: [✳✳✳✳.]...
  • Page 49 NX-320 ADJUSTMENT (K TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 12. CW ID 1) Adj item: [CWID] 1) Adj item: [CW ID Deviation Panel Panel [Panel Write the value as 1.00kHz±0.10kHz...
  • Page 50 NX-320 ADJUSTMENT (K TYPE) ■ Necessary Deviation adjustment item for each signaling and mode The following shows the necessary adjustment items for each signaling deviation. Please read the following table like the following example. In the case of the signaling “QT (Wide)”, this signaling is composed of three elements [Balance, Maximum Deviation (Analog Wide) and QT Deviation (Wide)]. Please adjust Balance and Maximum Deviation (Analog Wide) before adjusting QT Deviation (Wide).
  • Page 51 NX-320 ADJUSTMENT (K TYPE) F1: 450~520MHz (K,K2,K3) F2: 400~470MHz (K4,K5,K6) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 2. Sensitivity 1 * This adjustment can 1) Adj item: [Sensitivity 1] Panel [PC test Write the value as followings.
  • Page 52 NX-320 ADJUSTMENT (K TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 5. Open 1) Adj item: [SQL] 1) Adj item: [Open Panel [Panel tuning mode] “Open Squelch” Squelch *6 Adjust: [✳✳✳.] Squelch (Analog...
  • Page 53 NX-320 ADJUSTMENT (K TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 1) Adj item: [LRSS] 1) Adj item: [Low Panel [Panel tuning mode] Adjust with the ana- RSSI at Adjust: [✳✳✳] RSSI (NXDN Very...
  • Page 54 NX-320 ADJUSTMENT (E TYPE) Controls “ ” not appears on the LCD display Function Display Power switch/ Selector Volume Use as the DTMF keypad. [0] to [9] If a key is pressed during transmission, the DTMF [#], [ ] corresponding to the key that was presses is sent.
  • Page 55 NX-320 ADJUSTMENT (E TYPE) ■ Frequency and Signaling Panel Tuning Mode (E and E2 models only) The transceiver has been adjusted for the frequencies ■ Transceiver tuning (To enter tuning mode) shown in the following table. When required, readjust them To enter tuning mode, press the [ ] key while the trans- following the adjustment procedure to obtain the frequen- ceiver is in test mode.
  • Page 56 NX-320 ADJUSTMENT (E TYPE) ■ Adjustment item supplement Adjustment Item Description “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. Both “Counterclockwise Volume” and “Clockwise Volume” must be adjusted. Clockwise Volume (The curve data of volume is applied.) The lock voltage of VCO (Receive) is adjusted.
  • Page 57 NX-320 ADJUSTMENT (E TYPE) ■ Adjustment item and Adjustment range AW (Analog AS (Analog AN (Analog NN (NXDN NV (NXDN Adjusutment Panel Very Narrow) Adjust item Wide 5k) Wide 4k) Narrow) Narrow) Order item tuning test Number Adjustment range 1 point ADJ Counterclockwise Common ✓...
  • Page 58 NX-320 ADJUSTMENT (E TYPE) AW (Analog AS (Analog AN (Analog NN (NXDN NV (NXDN Adjusutment Panel Very Narrow) Adjust item Wide 5k) Wide 4k) Narrow) Narrow) Order item tuning test Number Adjustment range - *1 Receiver ✓ ✓ Low RSSI Section 6 1~256 - *1...
  • Page 59 NX-320 ADJUSTMENT (E TYPE) [ ] hold [Side2] [Side2] [Side2] Wide Wide DQT Deviation DQT Deviation DQT Deviation Narrow [ ] press [ ] hold [Side2] LTR Deviation LTR Deviation Narrow Wide [ ] press [ ] hold [Side2] [Side2] [Side2] Wide Wide...
  • Page 60 ■ Nut wrench In order to turn the volume nut and the channel selector nut, use a recommendation tool. + Terminal (Red) KENWOOD part No.: W05-1123-00 – Terminal (Black) ■ Battery Jig (W05-0909-00) Connect the power cable properly between the battery...
  • Page 61 NX-320 ADJUSTMENT (E TYPE) 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 435.099946~ check PTT: ON...
  • Page 62 NX-320 ADJUSTMENT (E TYPE) 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 Panel Check 12dB SINAD or check SSG output Channel: 1 AF VTVM...
  • Page 63 NX-320 ADJUSTMENT (E TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 4. Receive * This adjustment can [Manual Adjustment] Panel [PC test [PC test mode] 2.5V±0.1V Assist be performed only 1) Adj item: [Receive...
  • Page 64 NX-320 ADJUSTMENT (E TYPE) 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: [HPWR] 1) Adj item: [High Power meter Panel Panel [Panel 5.0W...
  • Page 65 NX-320 ADJUSTMENT (E TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment Maximum 1) Adj item: [NDEV] 1) Adj item: [Maximum Deviation Panel Panel [Panel 1337Hz 1311~1363Hz Deviation Adjust: [✳✳✳✳] Deviation (NXDN...
  • Page 66 NX-320 ADJUSTMENT (E TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment Maximum 1) Adj item: [ADEV] 1) Adj item: [Maximum Deviation Panel Panel [Panel 4200Hz 4150~4250Hz Deviation Adjust: [✳✳.✳.✳.] Deviation (Analog...
  • Page 67 NX-320 ADJUSTMENT (E TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 7. DQT 1) Adj item: [DQT] 1) Adj item: [DQT Deviation Panel Panel [Panel Write the value as 0.35kHz±0.05kHz Deviation Adjust: [✳✳✳✳.]...
  • Page 68 NX-320 ADJUSTMENT (E TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment DTMF 1) Adj item: [DTMF] 1) Adj item: [DTMF Deviation Panel Panel [Panel Write the value as 2.00kHz±0.05kHz Deviation Adjust: [✳✳✳.✳.]...
  • Page 69 NX-320 ADJUSTMENT (E TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 1) Adj item: [MSK] 1) Adj item: [MSK Deviation Panel Panel [Panel Write the value as 2.40kHz±0.05kHz Deviation Adjust: [✳✳✳.✳.]...
  • Page 70 NX-320 ADJUSTMENT (E TYPE) ■ Necessary Deviation adjustment item for each signaling and mode The following shows the necessary adjustment items for each signaling deviation. Please read the following table like the following example. In the case of the signaling “QT (Wide 5k)”, this signaling is composed of three elements [Balance, Maximum Deviation (Analog Wide 5k) and QT Deviation (Wide 5k)].
  • Page 71 NX-320 ADJUSTMENT (E TYPE) 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 Panel Volume Turn the Volume 0.63V±0.1V setting 1) CH-Sig: 1-1...
  • Page 72 NX-320 ADJUSTMENT (E TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment RSSI 1) Adj item: [RRSS] 1) Adj item: [RSSI Panel [Panel tuning mode] reference Adjust: [✳✳.✳.] Reference (Analog SP/MIC After input signal...
  • Page 73 NX-320 ADJUSTMENT (E TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment Open 1) Adj item: [SQL] 1) Adj item: [Open Panel [Panel tuning mode] Adjust with the ana- Squelch *6 Adjust: [✳✳✳] Squelch (NXDN...
  • Page 74 NX-320 ADJUSTMENT (E TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment 7. High RSSI 1) Adj item: [HRSS] 1) Adj item: [High Panel [Panel tuning mode] at –80dBm Adjust: [✳✳✳.] RSSI (Analog Nar-...
  • Page 75 NX-320 ADJUSTMENT (E TYPE) Condition Measurement Adjustment Specifi cations / Item Test- Remarks Panel tuning mode PC test mode Unit Terminal Unit Parts Method equipment Tight 1) Adj item: [SQLT] 1) Adj item: [Tight Panel [Panel tuning mode] Remark: Squelch Adjust: [✳✳.✳.] Squelch (Analog SP/MIC...

  • Page 76: Terminal Function

    NX-320 TERMINAL FUNCTION Display unit (X54-3760-XX A/3) Pin No. Name Function Pin No. Name Function Volume level input for audio control VOL_GND GND for volume level 33M input ENC3 Rotary switch input SCK0 Clock input SDI0 Serial data input ENC4 Rotary switch input SDO0 Serial data output...
  • Page 77 NX-320 TERMINAL FUNCTION SP/MIC Connector Specifi cation Signal Description Item and Condition Unit Note Name Type Input Voltage (High) PTT/RXD input PTT/RXD Digital Zin=10kΩ Input Voltage (Low) Maximum Input Voltage 1100 mVrms External MIC input AF=1kHz MICI Analog Zin=1.8kΩ@1kHz Standard Input Voltage 12.5 18.3 mVrms...
  • Page 78 NX-320 PC BOARD DISPLAY UNIT (X54-3760-XX) Component side view (J79-0312-09) -10: K3, K6, E -11: K2, K5, E2 -12: K, K4, E3 J79-0312 -09 C/3 – CP10 CP11 CP13 CP12 CP14 J79-0312-09 A/3 Side1 J79-0312-09 B/3...
  • Page 79 NX-320 PC BOARD DISPLAY UNIT (X54-3760-XX) Component side view (J79-0312-09) -10: K3, K6, E -11: K2, K5, E2 -12: K, K4, E3 Ref. No. Address Ref. No. Address Side2 Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side...
  • Page 80 NX-320 PC BOARD DISPLAY UNIT (X54-3760-XX) Foil side view (J79-0312-09) -10: K3, K6, E -11: K2, K5, E2 -12: K, K4, E3 Ref. No. Address Ref. No. Address Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side...
  • Page 81 NX-320 PC BOARD DISPLAY UNIT (X54-3760-XX) Foil side view (J79-0312-09) -10: K3, K6, E -11: K2, K5, E2 -12: K, K4, E3 MIC+ J79-0312-09 MIC– J79-0312-09 A/3 J79-0312-09 B/3...

  • Page 82: Tx-Rx Unit (X57-8050-Xx)

    NX-320 PC BOARD TX-RX UNIT (X57-8050-XX) -10: K, K2, K3 -11: K4, K5, K6, E, E2, E3 Component side view (J79-0314-19) C237 D502 R235 /FLDM Q510 IC201 C668 R507 R519 IC605 R552 R228 R224 C549 IC502 IC601 R657 C670 C509 IC904 C663 R554...
  • Page 83 NX-320 PC BOARD TX-RX UNIT (X57-8050-XX) -10: K, K2, K3 -11: K4, K5, K6, E, E2, E3 Component side view (J79-0314-19) J79-0314-19 Q106 R165 R161 R529 IC101 C178 C549 D501 Q511 C181 R502 Q505 C182 C177 R164 CP607 C511 C666 C541 C512 R150...
  • Page 84 NX-320 PC BOARD TX-RX UNIT (X57-8050-XX) -10: K, K2, K3 -11: K4, K5, K6, E, E2, E3 Foil side view (J79-0314-19) J79-0314-19 C244 R226 R131 C152 R231 C235 D105 C160 D206 C155 C232 Q202 C161 R238 R225 D207 L212 C221 C240 C246 L115...
  • Page 85 NX-320 PC BOARD TX-RX UNIT (X57-8050-XX) -10: K, K2, K3 -11: K4, K5, K6, E, E2, E3 Foil side view (J79-0314-19) D203 C204 R220 C227 C223 D202 R241 C202 C230 R205 C220 C232 C201 C219 C207 L209 R225 C203 C210 R207 L207 R203...

  • Page 86: Level Diagram

    NX-320 LEVEL DIAGRAM Receiver Section RF (Center Frequency) IF1 (49.95MHz) IF2 (450kHz) –118.5dBm –119.5dBm –107.0dBm –120.5dBm –107.0dBm –71.0dBm IF Amp FM IC ASIC Mixer C261 C246 C216 C353 C338 C335 Q201 IC302 IC610 Q303 Q202 AF (1kHz) 186.2mVrms 186.2mVrms 226.2mVrms 68.0mVrms 43.9mVrms Audio Amp...

  • Page 87: Interconnection Diagram

    NX-320 INTERCONNECTION DIAGRAM X54-3760-XX K3,K6,E * LCD K2,K5,E2 K,K4,E3 DISPLAY PCB X54-376 A/3 SECTION X54-376 ENC1 ENC2 ENC4 ENC3 TX-RX PCB VOL_GND X57-805 /EMG /EMG...

  • Page 88: Schematic Diagram

    NX-320 SCHEMATIC DIAGRAM LC D X54-3760-XX R61 R62 R63 R64 R65 R66 R67 R69 R70 R71 R72 R73 K3,K6,E 3.3k 3.3k 3.3k 3.3k 470 2.2k 6.8k 6.8k 2.2k 10k K2,K5,E2 3.3k K,K4,E3 C85 C90 X54-3760-XX R74 R75 R76 C78 0.047u 680p 0.01u K3,K6,E 2.2k...
  • Page 89 NX-320 SCHEMATIC DIAGRAM DISPLAY UNIT (X54-3760-XX) (A/3) X54-3760-XX R 84 R 8 5 K3,K6,E R 86 K2,K5,E2 K,K4,E3 3.3k C N 5 3.30V DISP_VER VCO MOD/VREF 100x4 SQ_SW /EVCS I C6 R8 1 4 7p SCK0 TC 75 W51 FK (F ) SCK0 C4 8 C 6 8...
  • Page 90 NX-320 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8050-XX) 3.30V L 609 C 663 A[16] A[0] A[15] A[11] D[9] A[16] D[11] A[19] A1 6 A[15] VC C 1 DQ11 A[20] A1 5 VS S1 D[1] IC605 IC601 D[13] A[5] DQ 3 A[9] A[5] DQ13 D[15] A[1]...
  • Page 91 NX-320 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8050-XX) L602 L 603 L604 R615 4.7k R616 4.7k X2/CLKIN 15MDSP 33MDSP 1.50V 3.0V VSS_6 C610 CVDD_6 VSS_5 CVDD_7 VSS_4 CVDD_8 VSS_3 C609 CVDD_9 VSS_2 CVDD_10 VSS_1 X2/CLKIN CVDD_11 X2/CLKIN CVDD_12 A’[0] CVDD_13 A[0] A[0] CVDD_14 A[1] A[1]...
  • Page 92 NX-320 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8050-XX) L613 33MC BUFFER(CLOCK) IC 6 09 3.30V X60 1 SM 5 0 2 3C N D H - G L614 L 77- 30 15- 05 0.03V R6 2 9 3 oU TPUT V S S C 674 R63 3 C 6 79 0.01u...
  • Page 93 NX-320 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8050-XX) C N502 F53-0324-05 2.5A 7.49V 7.50V L504 5.00V AVR(50C) Li-ion BATTERY REVERSE PROTECT R 501 27 0k C N 1 C N 504 C50 1 470 p AVR(33C) C502 470 p I C 505 68 00p C5 04 X C 620 9B 332M -G...
  • Page 94 NX-320 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8050-XX) R 41 1 C 442 C4 13 0. 01u C414 L1 20 0.01u C487 470p L425 3.30V TEMP CPout CPout NC_1 R 415 VCCcp NC_2 I C 4 0 3 LD/PS NC_3 C 420 C 4 2 3 S K Y 72310- 362 X4 0 1...
  • Page 95 NX-320 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8050-XX) 50CS 50CS C 457 L42 6 R 44 6 RX VCO D402,405,408,409 220n Q4 01 C 455 ASSIST TUNE L4 21 MCH3914(8)-H C 471 R 472 7.49V L 40 5 C4 40 D409 R 4 2 8 D408 C 466 C 446...
  • Page 96 NX-320 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8050-XX) R 474 R D 01M U S 1-T 113 DRIVE AMP C 1 20 R 1 26 Q 103 R:0V R47 5 R 170 10 0p T:0.81V D4 1 2 , 4 1 3 PRE DRIVE AMP T/R SW C1 13...
  • Page 97 NX-320 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8050-XX) FINAL AMP D 102,103 RD 0 7 MU S 2 B T11 2 ANT SW Q104 s t r ip line C 149 R128 D102 C 1 51 L 114 L1 15 L116 H V C 131 10 0p C 153 C 155...

  • Page 98: Block Diagram

    NX-320 BLOCK DIAGRAM TX-RX unit (X57-8050-XX) Q403: 2SC5383-T111 D414: HSC119 Ripple 50CS X601 IC609 Filter 18.432MHz SM5023CNDH-G Q406: SSM6L05FU-F TXCO Q407: SSM3J05FU-F PCK_DSP IC403 /PCS_DSP SKY72310-362 PLL MOD 33A 15M 33M IC601 IC605 Loop Filter Flash SRAM TCXO Memory IC603 X401 16.8MHz IC404(1/2)
  • Page 99 NX-320 BLOCK DIAGRAM K,K2,K3 TX: 450~520MHz K4,K5,K6,E,E2,E3 TX: 400~470MHz D102,D103 T/R VCO L05FU-F /T_R HVC131 J05FU-F Q408 D412,D413 Q102 Q103 Q104 D105,D106 2SC5636 HSC277 2SC5754 RD01MUS1-T113 RD07MUS2BT112 RN142S BUFF BUFF Pre-Drive Final Drive Q405 2SC5108(Y)F 50CS 50T 50R Q401,Q402 Q110 Q105 Q108 : MCH3914(8)-H...
  • Page 100 NX-320 BLOCK DIAGRAM...

  • Page 101: Knb-56N (Ni-Mh Battery Pack)

    NX-320 OPTIONAL ACCESSORIES KNB-55L (Li-ion Battery Pack) ■ External View ■ Schematic Diagram ■ Specifi cations Voltage : 7.4V (3.7V x 2) Discharging Terminal Capacity : 1480mAh – 1.8MΩ Protection Circiut – Charging Terminal KNB-56N (Ni-MH Battery Pack) ■ External View ■...

  • Page 102: Specifications

    Audio Distortion ..........Less than 3% Modulation ..........16K0F3E, 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 103 Modulation ............16K0F3E, 14K0F3E, 14K0F2D, 12K0F2D, 8K50F3E, 7K50F2D, 8K30F1E, 8K30F1D, 8K30F7W, 4K00F1E, 4K00F1D, 4K00F7W, 4K00F2D Analog measurements made per EN standards or TIA/EIA 603 and specifi cations shown are typical. Kenwood reserves the right to change specifi cations without prior notice or obligation.
  • Page 104 Suite 2504, 25/F, Tower 2, Nina Tower, No. 8 Yeung Uk Road, Bp 58416 Villepinte, 95944 Roissy Ch De Gaulle Cedex Tsuen Wan, New Territories, Hong Kong KENWOOD House, Dwight Road, Watford, Herts., 1 Ang Mo Kio Street 63, Singapore 569110 WD18 9EB United Kingdom...
  • Page 105 NX-320 NX-320 PC BOARD PC BOARD DISPLAY UNIT (X54-3760-XX) Component side view (J79-0312-09) DISPLAY UNIT (X54-3760-XX) Component side view (J79-0312-09) -10: K3, K6, E -11: K2, K5, E2 -12: K, K4, E3 -10: K3, K6, E -11: K2, K5, E2 -12: K, K4, E3 J79-0312 -09 C/3 –...
  • Page 106 NX-320 NX-320 PC BOARD PC BOARD DISPLAY UNIT (X54-3760-XX) Foil side view (J79-0312-09) DISPLAY UNIT (X54-3760-XX) Foil side view (J79-0312-09) -10: K3, K6, E -11: K2, K5, E2 -12: K, K4, E3 -10: K3, K6, E -11: K2, K5, E2 -12: K, K4, E3 MIC+ J79-0312-09 MIC–...
  • Page 107 NX-320 NX-320 PC BOARD PC BOARD TX-RX UNIT (X57-8050-XX) -10: K, K2, K3 -11: K4, K5, K6, E, E2, E3 TX-RX UNIT (X57-8050-XX) -10: K, K2, K3 -11: K4, K5, K6, E, E2, E3 Component side view (J79-0314-19) Component side view (J79-0314-19) J79-0314-19 Q106 C237...
  • Page 108 NX-320 NX-320 PC BOARD PC BOARD TX-RX UNIT (X57-8050-XX) -10: K, K2, K3 -11: K4, K5, K6, E, E2, E3 TX-RX UNIT (X57-8050-XX) -10: K, K2, K3 -11: K4, K5, K6, E, E2, E3 Foil side view (J79-0314-19) Foil side view (J79-0314-19) J79-0314-19 D203 C204...
  • Page 109 TX-RX UNIT (X57-8050-XX) LC D X54-3760-XX R61 R62 R63 R64 R65 R66 R67 R69 R70 R71 R72 R73 R 8 4 X54-3760-XX K3,K6,E 3.3k 3.3k 3.3k 3.3k 6.8k 470 2.2k R 8 5 K3,K6,E 50CS 50CS R4 74 K2,K5,E2 3.3k 6.8k 2.2k 10k R 8 6...
  • Page 110 TX-RX unit (X57-8050-XX) K,K2,K3 Q403: 2SC5383-T111 TX: 450~520MHz D414: HSC119 Ripple 50CS X601 IC609 K4,K5,K6,E,E2,E3 Filter SM5023CNDH-G 18.432MHz TX: 400~470MHz Q406: SSM6L05FU-F T/R VCO D102,D103 /T_R TXCO HVC131 PCK_DSP Q407: SSM3J05FU-F IC403 Q408 D412,D413 Q102 Q103 Q104 D105,D106 /PCS_DSP SKY72310-362 2SC5636 HSC277 2SC5754...

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