Kenwood NX-220 K Service Manual
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Kenwood NX-220 K Service Manual

Kenwood NX-220 K Service Manual

Vhf digital transceiver
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VHF DIGITAL TRANSCEIVER
NX-220
SERVICE MANUAL
NX-220 K,E3
Helical antenna
(KRA-22: 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-220 K2,E2
Helical antenna
(KRA-22: 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
B51-8962-00 ( N ) 405
NX-220 K3,E
Helical antenna
(KRA-22: 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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  • Page 1 VHF DIGITAL TRANSCEIVER NX-220 SERVICE MANUAL © 2011-3 PRINTED IN JA PAN B51-8962-00 ( N ) 405 NX-220 K,E3 NX-220 K2,E2 NX-220 K3,E Helical antenna Helical antenna Helical antenna (KRA-22: Option) (KRA-22: Option) (KRA-22: Option) Knob (Selector) Knob (Selector) Knob (Selector)

  • 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-220 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-220 SYSTEM SET-UP Merchandise received Type Frequency range (MHz) RF power LCD 4-key DTMF keypad NX-220 K TX/RX 136~174 License and frequency allocated by FCC NX-220 K2 TX/RX 136~174 NX-220 K3 TX/RX 136~174 Choose the type of transceiver NX-220 E...

  • Page 5: Realignment

    NX-220 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 NX-220 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-220 REALIGNMENT If the password is not set, the transceiver displays the User mode. The target can then be operated by the “CLONE”. same program as the source. 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-220 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-220 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-220 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-220 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-220 CIRCUIT DESCRIPTION 1. Overview 2. Frequency Confi guration The NX-220 is a VHF portable transceiver designed to The receiver is a double-conversion superheterodyne operate in the frequency range of 136 to 174MHz. The unit using the first intermediate frequency (IF) of 49.95MHz consists of a receiver, transmitter, phase-locked loop (PLL) and the second IF of 450kHz.
  • Page 13 NX-220 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-220 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-220 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-220 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-220 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-220 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-220 COMPONENTS DESCRIPTION Ref. No. Part Name Description Ref. No. Part Name Description Variable capaci- D105,106 Diode Antenna switch D411 Assist tune tance diode Variable capaci- D202~204 BPF tune D412,413 Diode T/R switch tance diode Variable capaci- D414 Diode Speed up D206 BPF tune tance diode...

  • Page 20: Parts List

    NX-220 PARTS LIST 2 2 0 CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc. 5 = Value 101 = 100pF Multiplier 3 = Temp.
  • Page 21 NX-220 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 22 NX-220 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 CK73HB1H472K CHIP C 4700PF RK73HB1J823J CHIP R 1/16W CC73HCH1H181J CHIP C 180PF RK73HB1J100J CHIP R 1/16W CK73HB1A104K CHIP C...
  • Page 23 NX-220 PARTS LIST DISPLAY UNIT (X54-3760-XX) TX-RX UNIT (X57-8040-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation ✽ S1-4 S70-0516-05 TACT SWITCH C144 CC73GCH1H180G CHIP C 18PF ✽ S70-0519-05 TACT SWITCH K2,E2...
  • Page 24 NX-220 PARTS LIST TX-RX UNIT (X57-8040-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C247 CC73HCH1H030B CHIP C 3.0PF C434 CC73HCH1H101J CHIP C 100PF C249 CC73HCH1H180G CHIP C 18PF C437,438 CC73HCH1H101J...
  • Page 25 NX-220 PARTS LIST TX-RX UNIT (X57-8040-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation C520 CK73HB1A104K CHIP C 0.10UF C680 CK73HB1A105K CHIP C 1.0UF C521 CK73GB0J106K CHIP C 10UF C681 CK73HB1A104K...
  • Page 26 NX-220 PARTS LIST TX-RX UNIT (X57-8040-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation L115 L34-4569-05 AIR-CORE COIL CP601 RK74HB1J104J CHIP-COM 100K 1/16W L116 L34-4568-05 AIR-CORE COIL CP602 RK74HB1J103J CHIP-COM 10K 1/16W...
  • Page 27 NX-220 PARTS LIST TX-RX UNIT (X57-8040-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R217 RK73HB1J104J CHIP R 100K 1/16W R422 RK73HB1J106J CHIP R 1/16W R220 RK73HB1J105J CHIP R 1.0M 1/16W R423...
  • Page 28 NX-220 PARTS LIST TX-RX UNIT (X57-8040-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation R529 RK73HB1J000J CHIP R 1/16W R908 RK73HB1J334J CHIP R 330K 1/16W R530-533 RK73HB1J104J CHIP R 100K 1/16W R909...
  • Page 29 NX-220 PARTS LIST TX-RX UNIT (X57-8040-10) Desti- Desti- Ref. No. Ad dress Parts No. Description Ref. No. Ad dress Parts No. Description parts nation parts nation IC904 TC75S51FE(F) MOS-IC Q102 2SC4926YD TRANSISTOR Q103 RD01MUS1-T113 Q104 RD07MUS2BT112 Q105 2SC5383-T111 TRANSISTOR Q106 RT1N441U-T111 TRANSISTOR Q107...

  • Page 30: Exploded View

    NX-220 EXPLODED VIEW 16 (K,E3) 3 (K3,E) MIC1 (C/3) K2,K3,E,E2 K2,E2 K,E3 Display unit (X54-376 A/3) Fx14 TX-RX unit (X57-804) 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-220 PACKING 52 Belt clip (J29-0701-15) 7 Cap (B09-0686-03) 16 Stopper (16CH) (D32-0454-04): K2,K3,E,E2 49 Holder (J19-5483-23) 47 Packing fixture (H12-4312-02) 708 Pamphlet 13 Instruction manual (B62-2292-00): K,K2,K3 14 Instruction manual (B62-2319-00): E,E2,E3 48 Item carton case (H52-2437-02): K,K2,K3 Parts with the exploded numbers larger than 700 are not supplied.

  • Page 32: Trouble Shooting

    NX-220 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-220 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. the Service TX-RX unit (X57-8040-11) and the schematic • When a new printed circuit board is used, the Kenwood diagram of the original TX-RX unit (X57-8040-10). (R4 is ESN changes, as does the Transceiver Information display connected with GND (ground) only.)

  • Page 35: Adjustmentk Type

    NX-220 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-220 ADJUSTMENT (K TYPE) ■ Frequency and Signaling Panel Tuning Mode The transceiver has been adjusted for the frequencies (K2 and K3 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-220 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-220 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-220 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-220 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-220 ADJUSTMENT (K 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 155.099962~ check PTT: ON...
  • Page 43 NX-220 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-220 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-220 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-220 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-220 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-220 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-220 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-220 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-220 ADJUSTMENT (K TYPE) 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 Note: be performed only...
  • Page 52 NX-220 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-220 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: E Type

    NX-220 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-220 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-220 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-220 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-220 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-220 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-220 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 155.099962~ check PTT: ON...
  • Page 62 NX-220 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-220 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 1) Adj item: [Receive Panel [PC test [PC test mode] 2.5V±0.1V Assist be performed only...
  • Page 64 NX-220 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-220 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-220 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-220 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-220 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-220 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-220 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-220 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-220 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-220 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-220 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-220 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-220 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-220 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: Pc Board

    NX-220 PC BOARD DISPLAY UNIT (X54-3760-XX) -10: K3, E -11: K2, E2 -12: K, E3 Component side view (J79-0312-09) J79-0312 -09 C/3 – CP10 CP11 CP13 CP12 CP14 J79-0312-09 A/3 Side1 J79-0312-09 B/3...
  • Page 79 NX-220 PC BOARD DISPLAY UNIT (X54-3760-XX) -10: K3, E -11: K2, E2 -12: K, E3 Component side view (J79-0312-09) Ref. No. Address Ref. No. Address Side2 Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side...
  • Page 80 NX-220 PC BOARD DISPLAY UNIT (X54-3760-XX) -10: K3, E -11: K2, E2 -12: K, E3 Foil side view (J79-0312-09) Ref. No. Address Ref. No. Address Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side...
  • Page 81 NX-220 PC BOARD DISPLAY UNIT (X54-3760-XX) -10: K3, E -11: K2, E2 -12: K, E3 Foil side view (J79-0312-09) MIC+ J79-0312-09 MIC– J79-0312-09 A/3 J79-0312-09 B/3...

  • Page 82: Tx-Rx Unit (X57-8040-10)

    NX-220 PC BOARD TX-RX UNIT (X57-8040-10) Component side view (J79-0313-19) C237 D502 R234 /FLDM Q510 IC201 C668 R507 R519 R552 IC605 R228 R224 C549 IC502 IC601 R657 C670 C509 IC904 C663 R554 R661 R623 C652 BSCAN0 L609 C601 R553 C607 R660 C688 L511...
  • Page 83 NX-220 PC BOARD TX-RX UNIT (X57-8040-10) Component side view (J79-0313-19) J79-0313-19 Q106 R165 R161 R529 IC101 C178 C549 D501 Q511 C181 R502 Q505 C182 C177 R164 CP607 C511 C666 C541 C512 R150 C667 D509 C913 C910 Q902 R550 C905 R515 R902 C536 C552...
  • Page 84 NX-220 PC BOARD TX-RX UNIT (X57-8040-10) Foil side view (J79-0313-19) J79-0313-19 C244 R226 R220 R131 C152 D204 R231 C235 D105 R235 C160 D206 R236 Q202 C246 C155 C161 C262 C240 L118 C251 L115 R132 L213 C261 R130 C260 R129 R102 C106 L117 R141...
  • Page 85 NX-220 PC BOARD TX-RX UNIT (X57-8040-10) Foil side view (J79-0313-19) C204 R220 C223 C202 D202 D203 R205 L207 C201 C207 C203 R207 C210 C293 R203 C228 C224 Q201 R211 C356 R345 C357 C353 L203 L210 R317 R210 C350 C214 R245 C205 L505 R335...

  • Page 86: Level Diagram

    NX-220 LEVEL DIAGRAM Receiver Section RF (Center Frequency) IF1 (49.95MHz) IF2 (450kHz) –119.5dBm –120.0dBm –111.0dBm –120.5dBm –107.0dBm –71.0dBm IF Amp FM IC ASIC Mixer R133 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-220 INTERCONNECTION DIAGRAM X54-3760-XX K3,E * LCD K2,E2 K,E3 DISPLAY PCB X54-376 A/3 SECTION X54-376 ENC1 ENC2 ENC4 ENC3 TX-RX PCB VOL_GND X57-804 /EMG /EMG...

  • Page 88: Schematic Diagram

    NX-220 SCHEMATIC DIAGRAM L CD R61 R62 R63 R64 R65 R66 R67 R69 R70 R71 R72 R73 X54-3760-XX K3,E 3.3k 3.3k 3.3k 3.3k 470 2.2k 6.8k K2,E2 6.8k 2.2k 10k 3.3k K,E3 X54-3760-XX R74 R75 R76 C78 C85 C90 0.047u 680p 0.01u K3,E 680 0.01u...
  • Page 89 NX-220 SCHEMATIC DIAGRAM DISPLAY UNIT (X54-3760-XX) (A/3) X54-3760-XX R 8 4 R 85 0-10 K3,E R 86 0-11 K2,E2 0-12 K,E3 3.3k 3.30V DISP_VER VCO MOD/VREF 100x4 SQ_SW /EVCS I C6 R 8 1 4 7p SCK0 TC 75 W51 FK (F ) SCK0 C4 8 C 68...
  • Page 90 NX-220 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8040-10) 3.30V L609 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 A[5] D[13] D Q 3 D Q 1 A[5] DQ13 A[9]...
  • Page 91 NX-220 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8040-10) L602 L6 03 L604 R615 L6 05 4.7k R616 4.7k X2/CLKIN 15MDSP 33MDSP 1.50V 3.30V VSS_6 CVDD_6 C610 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...
  • Page 92 NX-220 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8040-10) L61 3 33MC BUFFER(CLOCK) 3.30V IC 6 0 9 X6 01 L614 SM 5 0 2 3 C N D H - G L77- 3 015- 05 0.03V R6 2 9 V S S 3 oUTP UT C6 74 R 633...
  • Page 93 NX-220 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8040-10) C N502 F53-0324-05 2.5A 7.49V 7.50V L504 5.00V Li-ion AVR(50C) BATTERY REVERSE PROTECT R5 01 27 0k C N 1 C N 504 C501 4 7 0 p C50 2 AVR(33C) 4 7 0 p IC 505 C504 6 800p...
  • Page 94 NX-220 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8040-10) /T_R /T_R C 442 R 411 C413 0.01 u L 12 0 100p C414 0.01 u L 4 2 5 3.30V TEMP CPout CPout NC_1 R 415 VCCcp NC_2 I C 4 0 3 NC_3 LD/PS C 420...
  • Page 95 NX-220 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8040-10) /T_R 50CS 50CS R 4 53 D416,417 R:4.80V FIN FILTER TUNE T:4.80V D402,405,409 RX VCO M CH 3914 ( 7) - H R 446 C 45 7 C 471 ASSIST TUNE Q401 7.49V L4 05 C 440 R4 30 D 409...
  • Page 96 NX-220 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8040-10) DRIVE AMP C 120 L10 7 R 4 74 R D 01M U S 1 -T 11 3 R:0V 4.7n Q 103 100p T:0.53V D4 1 2 , 4 1 3 PRE DRIVE AMP T/R SW C1 13 R 115...
  • Page 97 NX-220 SCHEMATIC DIAGRAM TX-RX UNIT (X57-8040-10) FINAL AMP D10 2,103 L 113 RD 0 7 M U S 2 B T11 2 ANT SW Q104 s t r i p l i n e L 1 1 0 L 1 1 1 L 112 C14 5 C14 7...

  • Page 98: Block Diagram

    NX-220 BLOCK DIAGRAM TX-RX unit (X57-8040-10) 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-220 BLOCK DIAGRAM TX: 136~174MHz T/R VCO D102,D103 L05FU-F /T_R HVC131 J05FU-F Q408 D412,D413 Q102 Q103 Q104 D105,D106 2SC5636 HSC277 2SC4926YD RD01MUS1-T113 RD07MUS2BT112 RN142S BUFF BUFF Pre-Drive Final Drive Q405 2SC5108(Y)F 50CS 50T 50R Q401,Q402 K(F) Q110 Q105 Q108 : MCH3914(7)-H SSM6L05FU-F 2SC5383-T111 SSM3J05FU-F...
  • Page 100 NX-220 BLOCK DIAGRAM...

  • Page 101: Optional Accessories

    NX-220 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-220 NX-220 PC BOARD PC BOARD DISPLAY UNIT (X54-3760-XX) -10: K3, E -11: K2, E2 -12: K, E3 DISPLAY UNIT (X54-3760-XX) -10: K3, E -11: K2, E2 -12: K, E3 Component side view (J79-0312-09) Component side view (J79-0312-09) J79-0312 -09 C/3 –...
  • Page 106 NX-220 NX-220 PC BOARD PC BOARD DISPLAY UNIT (X54-3760-XX) -10: K3, E -11: K2, E2 -12: K, E3 DISPLAY UNIT (X54-3760-XX) -10: K3, E -11: K2, E2 -12: K, E3 Foil side view (J79-0312-09) Foil side view (J79-0312-09) MIC+ J79-0312-09 MIC–...
  • Page 107 NX-220 NX-220 PC BOARD PC BOARD TX-RX UNIT (X57-8040-10) Component side view (J79-0313-19) TX-RX UNIT (X57-8040-10) Component side view (J79-0313-19) J79-0313-19 Q106 C237 D502 R234 R165 R161 /FLDM Q510 IC201 C668 R507 R519 R529 IC101 R552 IC605 C178 R228 R224 C549 D501 IC502...
  • Page 108 NX-220 NX-220 PC BOARD PC BOARD TX-RX UNIT (X57-8040-10) Foil side view (J79-0313-19) TX-RX UNIT (X57-8040-10) Foil side view (J79-0313-19) J79-0313-19 C204 C244 R226 R220 C223 R131 C152 D204 R231 C235 C202 D105 D202 D203 R235 C160 R205 D206 L207 R236 C201 Q202...
  • Page 109 TX-RX UNIT (X57-8040-10) L CD X54-3760-XX R61 R62 R63 R64 R65 R66 R67 R69 R70 R71 R72 R73 R 84 X54-3760-XX K3,E 3.3k 3.3k 3.3k 3.3k 6.8k 470 2.2k /T_R /T_R /T_R 0-10 K3,E 50CS 50CS K2,E2 3.3k 6.8k 2.2k 10k R 8 6 0-11 L602...
  • Page 110 TX-RX unit (X57-8040-10) Q403: 2SC5383-T111 D414: HSC119 Ripple 50CS X601 IC609 Filter TX: 136~174MHz SM5023CNDH-G 18.432MHz 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 2SC4926YD RD01MUS1-T113 RD07MUS2BT112 RN142S PLL MOD...

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