Kenwood TK-782 Service Manual

Vhf fm transceiver / vhf

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Copyright 2006 by Kenwood Corporation. All rights reserved.
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Summary of Contents for Kenwood TK-782

  • Page 1 Kenwood. Disclaimer While every precaution has been taken in the preparation of this manual, Kenwood assumes no responsibility for errors or omissions. Neither is any liability assumed for damages 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 2: Table Of Contents

    VHF FM TRANSCEIVER / VHF TK-782 SERVICE MANUAL / © 2002-3 B51-8619-00 ( N ) 611 Panel assy Cabinet (Upper) Key top (A62-0642-03) (A01-2165-23) (K29-9105-22) CONTENTS GENERAL ..............2 OPERATING FEATURES ......... 5 REALIGNMENT ............23 INSTALLATION ............28 CIRCUIT DESCRIPTION ......... 35 SEMICONDUCTOR DATA ........
  • Page 3: General

    TK-782 GENERAL / INTRODUCTION SCOPE OF THIS MANUAL This manual is intended for use by experienced techni- cians familiar with similar types of commercial grade com- munications equipment. It contains all required service in- formation for the equipment and is current as of the publica- tion data.
  • Page 4 4-1. Antenna system Control station. The antenna system selection depends on many factors and is beyond the scope of this manual. Your KENWOOD dealer can help you select an antenna sys- tem that will best serve your particular needs. 4-2. Radio location Select a convenient location for your control station radio which is as close as practical to the antenna cable entry point.
  • Page 5 TK-782 GENERAL / SERVICE This radio is designed for easy servicing. Refer to the schematic diagrams, printed circuit board views, and align- ment procedures contained in this manual. Note When you modify your radio as described in system set- up, take the following precaution.
  • Page 6: Operating Features

    TK-782 OPERATING FEATURES / 1. Operation Features The TK-782 is a VHF FM radio designed in DTMF/DMS model. This transceiver can handle up to 250 groups with 250 channels in each group. You can use option signalling which is DTMF or DMS (Digi- tal Message System-FFSK signalling) for every channel.
  • Page 7: Channel Name

    TK-782 OPERATING FEATURES / " Auto Dial Programming " You can store the DTMF code and name, or erase it at the transceiver. ! To store a DTMF code Press the [Auto dial programming] key to enter “Auto dial programming mode”. Select the desired memory number you wish to store.
  • Page 8: Emergency Call

    TK-782 OPERATING FEATURES / " Display " Press the this key toggle the display function on/off. The function backups when the transceiver turns on/off. " Emergency Call " Pressing this key causes the transceiver to enter the emer- gency mode. The transceiver jumps to the programmed “Emergency group/channel”...
  • Page 9: Operator Selectable Tone

    TK-782 OPERATING FEATURES / " Operator Selectable Tone " When this key is pressed, the “OST” appears and encode/ decode QT/DQT is switched to the OST tone pair. If pressed again, the “OST” display goes off and encode/decode QT/ DQT returns to transceivers preset.
  • Page 10: Squelch Off

    TK-782 OPERATING FEATURES / " Selcall Entry " Press [Selcall entry] key to enter the desired Selcall code you want to call. A transceivers unit ID is defined by a combination of 3- digit fleet and 4-digit ID numbers. To enter Selcall number, use the keypad (keypad model) or use the [Channel up], [Channel down] keys to select a num- ber.
  • Page 11: Front Panel

    TK-782 OPERATING FEATURES / " None " When you press this key, the transceiver emits the “Key input error tone” (no function is performed). " Volume Up/Down " When this key is pressed, the volume level is increased/ decreased and repeats if held for 200ms or longer.
  • Page 12: Rear Panel

    TK-782 OPERATING FEATURES / Indicator Description Appears when you press key programmed as Monitor. This icon is not used on this transceiver. Appears while you are in Scan mode. Appears when you activate the auxiliary function. This icon is not used on this transceiver.
  • Page 13: Priority Channel Setting

    TK-782 OPERATING FEATURES / 3. Scan Operating " Scan types " ! Single group scan You can scan all valid (ADD) channels in the displayed group that can be selected with the group up/down key. ! Multiple group scan You can scan all valid (ADD) channels in the all valid (ADD) group.
  • Page 14: Revert Channel

    TK-782 OPERATING FEATURES / " Revert channel " The revert channel is used to transmit during scanning and set by the programming software. 1) Priority The transceiver reverts to the priority channel. 2) Priority with talkback The transceiver reverts to the priority channel.
  • Page 15 TK-782 OPERATING FEATURES / " Squelch logic signal " This signal is useful for external radio control units which require a signal at the time of carrier operate relay or tone operate relay. " TX sense " Select one of the following three output functions for data communication.
  • Page 16: Off Hook Decode

    TK-782 OPERATING FEATURES / " Sub LCD display " You can use 3-digit the display to display the channel num- ber or group number. It is useful when the main (12-digit) display indicates group or channel name or other functions.
  • Page 17 TK-782 OPERATING FEATURES / " “TOT” reset time " The transceiver has “TOT” reset timer. This timer is the minimum wait time allowed during a transmission that will reset the “TOT” count. “TOT” reset time causes the “TOT” to continue even after PTT is released unless the “TOT”...
  • Page 18 (Digital Message System : DMS) " General " The Alphanumeric Two-way Paging Function (DMS) is a Kenwood proprietary protocol. It enables a variety of paging functions. " ID Construction " A radio unit ID is defined by a combination of 3-digit Fleet and 4-digit ID numbers.
  • Page 19: Status Message

    TK-782 OPERATING FEATURES / " Status Message " Using a 2-digit number, you can send and receive a Status message which may be decided in your talk group. Each Status may be displayed with 16 alphanumeric characters if programmed in the radio. A maximum of 15 received mes- sages can be stored in the stack memory, and it can be re- viewed after reception.
  • Page 20: Gps Report

    TK-782 OPERATING FEATURES / " Other Functions " ! Manual Dial Fleet, ID and Status numbers can be entered from DTMF keypad. (DTMF microphopne is required.) ! Data TX with QT/DQT Whether programmed QT/DQT is modulated or not with a data transmission except for Selcall.
  • Page 21 NMEA-0183 standard command. This should be set ac- cording to your PC application. 2) MAP HEADER KW1 ($PKLDS) This is a Kenwood original sentence which consists of “$GPGLL + Fleet + ID + Status”. This item should be set according to your PC application.
  • Page 22: Audible User Feedback Tones

    TK-782 OPERATING FEATURES / ! Maximum ACK Wait Time Maximum ACK Wait Time is the maximum amount of time to wait for an acknowledgement from the called radio unit. It is used as an interval time of retries. It must be set greater than the ACK Delay Time of the called radio unit.
  • Page 23 TK-782 OPERATING FEATURES / " Key press tone [B] " Sounds when a key is pressed. For toggle keys, sounds when the toggle function is turned off (key press tone [A] sounds when it is turned on). " Key press tone [C] "...
  • Page 24: Realignment

    TK-782 REALIGNMENT / 1. Modes User mode Panel test mode Panel tuning mode Data program- PC mode ming mode Firmware program- PC test mode PC tuning mode ming mode Clone mode Self programming mode Mode Function User mode For normal use.
  • Page 25 Notes : ! The data stored in the personal computer must match model type when it is written into the flash memory. ! Change the TK-782 to PC mode, then attach the interface cable. 5-3. KPG-46 Description (PC programming interface cable : Option) The KPG-46 is required to interface the TK-782 to the com- puter.
  • Page 26 3. Set the firmware to be updated by File name item. 4. Turn the TK-782 Power ON with the [A] switch held down. Hold the switch down until the display changes to “PROG 57600”. When “PROG 57600” appears, release your fin- ger from the switch.
  • Page 27: Self Programming Mode

    TK-782 REALIGNMENT / 7. Self Programming Mode Write mode for frequency data and signalling etc. Mainly used by the person maintaining the user equipment. 7-1. Channel Setting Mode Each channel can be setup in its action mode by using the panel keys.
  • Page 28 TK-782 REALIGNMENT / 7-2. Flow Chart Self programming mode Channel selection Channel setting mode Group selection RX frequency [CALL] [CALL] [C]/[D] RX signalling DQT N DQT I [CALL] [CALL] [CALL] [C]/[D] TX freuency [CALL] [CALL] [C]/[D] TX signalling DQT N...
  • Page 29: Installation

    TK-782 INSTALLATION / 1. Accessory Connection Cable (KCT-19 : Option) The KCT-19 is an accessory connection cable for connect- ing external equipment. The connector has 15 pins and the necessary signal lines are selected for use. 1-1. Installing the KCT-19 in the transceiver 1.
  • Page 30 TK-782 INSTALLATION / 1-2. KCT-19 Accessory Port Function No. (A) No. (B,C,D,E) Name Function Note External hook input. Microphone ground. Speaker audio mute input. Ignition sense input. Receiver detector output. External microphone input. Transmitter sense output. Ground. Switched B+, DC 13.6V output.
  • Page 31 TK-782 INSTALLATION / 1-3. Data Equipment Connection The jumpers must be set to either one for each function. Otherwise, the radio will not work properly. ME/AM R12 (0Ω) R167 (0Ω) Function / Default Default MI/TXS R94 (0Ω) R24 (0Ω) Function / Default...
  • Page 32 TK-782 INSTALLATION / 2. Accessory Terminal (TX-RX Unit A/2) 2-1. External Connector Accessory Terminal Method Connector Function name O Detect signal output. (Output level : 250mVrms; standard modulation) External hook signal input. On hook : L, Off hook : H Ignition sense input.
  • Page 33 TK-782 INSTALLATION / Connector Function name O TX logic signal output. Active logic level is low. Active type can be selectable in the KPG-77D. Serial data input 1. “Com1” port must be select “DATA”/“GPS” function in the KPG-77D. O Serial data output 1. “Com1” port must be select “DATA”/“GPS”...
  • Page 34 TK-782 INSTALLATION / Schematic diagram PC board view Name Function Name Unit CODE3 Not used. TX-RX (A/2) CODE4 Not used. TX-RX (A/2) Squelch signal output. Signal TX-RX (A/2) logic type can select “Carrier operate relay” or “Tone operate relay”. Active logic level or type can select in the KPG-77D.
  • Page 35 4. Fitting the Control Panel Upside Down transceiver. Refit the two halves of the case to complete The TK-782 control panel can be fitted upside down, so installation. (Fig. 7) the transceiver can be mounted with its internal speaker (in the upper half of the case) facing down in your car.
  • Page 36: Circuit Description

    TK-782 CIRCUIT DESCRIPTION / switch (D211,D212) and goes to the front end of the receiver. Frequency Configuration The front-end filter is a variable BPF consisting of three coils The TX-RX unit (A/2) incorporates a VCO, based on a frac- and three varicap diodes (D206, D207, D208) to eliminate tional N type PLL synthesizer system, that allows a channel unwanted out-of-band signal components.
  • Page 37 TK-782 CIRCUIT DESCRIPTION / " Wide/Narrow Changeover Circuit " The W/N port (pin 11) of the shift register (IC7) is used to switch between ceramic filters. When the W/N port is high, Q24 turns on and the ceramic filter SW diode (D22, D23) CF1 turns on to receive a Wide signal.
  • Page 38 " " VCO/PLL Circuit The TK-782 has a VCO for the transmitter and a VCO for the receiver in a sub-unit (A1). They are housed in a solid shielded case and connected to the TX-RX unit (A/2) through CN101.
  • Page 39 TK-782 CIRCUIT DESCRIPTION / " Unlock Circuit " Power Amplifier Circuit During reception, the TR signal goes high, the KEY signal The transmit output signal from the VCO is amplified to a goes low, and Q10 turns on. Q11 turns on and a voltage is specified level of the power module (IC400) by the drive block applied to the collector (8R).
  • Page 40 TK-782 CIRCUIT DESCRIPTION / " Memory Circuit Control Circuit The transceiver has a 2M-bit (256k x 8) flash ROM (IC510) The CPU carries out the following tasks: and an 16k-bit EEPROM (IC512). The flash ROM contains 1) Controls the shift register (IC7, IC8, IC508) AF MUTE, firmware programs, data and user data which is programmed WIDE/NARROW, T/R KEY outputs.
  • Page 41 CIRCUIT DESCRIPTION / " Key Matrix Circuit " The TK-782 front panel has ten keys. Each of them is connected to a cross point of a matrix of the KEY1 to KEY7 ports of the microprocessor. The KEY5 to KEY7 ports are always high, while the KEY1 to KEY4 ports are always low.
  • Page 42 TK-782 CIRCUIT DESCRIPTION / " D/A Converter Power Supply Circuit The D/A converter (IC5) is used to adjust TONE and MO When the POWER switch on the control unit is pressed, modulation, beep, AF volume, TV voltage, FC reference volt- the PSW signal goes low.
  • Page 43: Semiconductor Data

    TK-782 SEMICONDUCTOR DATA / Microprocessor : 30620M8A-2K9GP (TX-RX Unit B/2 : Control Section IC511) " Terminal function " Pin No. Name Function LSDOUT Low speed data output. HSDOUT High speed data output. HSDIN High speed data input. DTMSTD DTMF decode IC data detect input.
  • Page 44 TK-782 SEMICONDUCTOR DATA / Pin No. Name Function AFDAT FFSK data output. RFCLK Common clock output. (TX-RX unit A/2) Not used. Not used. HOLD Not used. HLDA Not used. BLCK Not used. Flash memory RD bus. Not used. Flash memory WR bus.
  • Page 45 TK-782 SEMICONDUCTOR DATA / Shift Register : BU4094BCFV " Terminal function (TX-RX unit B/2 IC508) " Pin No. Port Name Function Strobe Data Clock Red LED. H : ON, L : OFF Green LED. H : ON, L : OFF KBLC Key back light.
  • Page 46: Description Of Components

    TK-782 SEMOCONDUCTOR DATA / DESCRIPTION OF COMPONENTS / " Terminal function (TX-RX unit A/2 IC8) " Pin No. Port Name Function Strobe DATA Clock Audio mute 1. H : Mute, L : Unmute Link complete. (Programmable active H/L) VCO shift switching. H : TX, L : RX DET mute.
  • Page 47 TK-782 DESCRIPTION OF COMPONENTS / Ref. No. Use / Function Operation / Condition IC14 8V AVR IC15 Flip-flop Power on/off control IC201 DC amp IC202 Mixer IC300 Reference 16.8MHz. PLL lock : LD “H” IC400 Power module RF power 25W...
  • Page 48 TK-782 DESCRIPTION OF COMPONENTS / Ref. No. Use / Function Operation / Condition Q402 W/N switch Wide time off Q403 W/N switch Wide time on D1~6 Protection HOR protection D8,9 Protection OR gate AF mute D12~14 Protection HT switch Reverse protection...
  • Page 49 TK-782 DESCRIPTION OF COMPONENTS / Ref. No. Use / Function Operation / Condition IC511 IC512 EEPROM IC513 5V AVR 5C (Control unit) IC710 Buffer amp IC711 Buffer amp Q501 MIC mute MM “H” and MM1 “H” time mute on Q502 AF mute KEY “H”...
  • Page 50: Parts List

    TK-782 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 : Europe Les articles non mentionnes dans le Parts No. ne sont pas fournis.
  • Page 51 TK-782 PARTS LIST / TX-RX UNIT (X57-6143-01) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation CC73GCH1H150J CHIP C 15PF C199 CC73GCH1H080D CHIP C 8.0PF CK73GB1H102K CHIP C 1000PF C201 CK73GB1H102K...
  • Page 52 TK-782 PARTS LIST / TX-RX UNIT (X57-6143-01) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C304-306 CK73GB1H102K CHIP C 1000PF C545 CK73GB1H102K CHIP C 1000PF C307 CC73GCH1H180J CHIP C 18PF...
  • Page 53 TK-782 PARTS LIST / TX-RX UNIT (X57-6143-01) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation C710 CK73GB1C104K CHIP C 0.10UF L77-1762-05 CRYSTAL RESONATOR (44.395MHZ) C711,712 CK73GB1H222K CHIP C 2200PF X501 L77-1708-05 CRYSTAL RESONATOR (3.579545MHZ)
  • Page 54 TK-782 PARTS LIST / TX-RX UNIT (X57-6143-01) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation RK73GB1J390J CHIP R 1/16W R161 RK73GB1J474J CHIP R 470K 1/16W RK73GB1J102J CHIP R 1.0K 1/16W...
  • Page 55 TK-782 PARTS LIST / TX-RX UNIT (X57-6143-01) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation R316,317 R92-1252-05 CHIP R 0 OHM J 1/16W R551 RK73GB1J223J CHIP R 1/16W R318 RK73GB1J271J...
  • Page 56 TK-782 PARTS LIST / TX-RX UNIT (X57-6143-01) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation R649 RK73HB1J102J CHIP R 1.0K 1/16W 02DZ18(X,Y) ZENER DIODE R650-652 R92-1368-05 CHIP R 0 OHM...
  • Page 57 TK-782 PARTS LIST / TX-RX UNIT (X57-6143-01) PLL/VCO (X58-4712-71) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation DTC114EE DIGITAL TRANSISTOR C133,134 CK73GB1H102K CHIP C 1000PF 2SC2059K(P) TRANSISTOR C135,136 CC73GCH1H020B CHIP C 2.0PF...
  • Page 58 23x2 27x2 J501 IC400 16x2 TX-RX unit (B/2) TX-RX unit (A/2) A M2.6 x 6 (OC) BLK : N32-2606-45 M3 x 8 : N67-3008-46 M2.6 X 6 (Br-Tap) : N87-2606-46 D M2.6 x 12 (Br-Tap) : N87-2612-46 Dx11...
  • Page 59: Packing

    TK-782 PACKING / 34 Polystyrene foamed fixture (R) (H10-6619-12) 37 Protection bag (H25-0720-04) 7 Instruction manual (B62-1659-00) 33 Polystyrene foamed fixture (F) (H10-6618-12) 38 Item carton case (H52-1930-02) Parts with the exploded numbers larger than 700 are not supplied.
  • Page 60 TK-782 ADJUSTMENT / Test Mode ! Test Mode Operating Features This transceiver has a test mode. To enter test mode, press [B] key and turn power on. Hold [B] key until test channel No. and test signalling No. appears on LCD. Test mode can be inhibited by programming.
  • Page 61 TK-782 ADJUSTMENT / ! Frequency and Signalling The set has been adjusted for the frequencies shown in the following table. When required, re-adjust them following the adjustment procedure to obtain the frequencies you want in actual operation. " Frequency (MHz) "...
  • Page 62 TK-782 ADJUSTMENT / Press [A], now in tuning mode. Use [ C] button to write " Tuning Mode Flow Chart / tuning data through tuning modes, and [Channel Up/Down] to adjust tuning requirements (1 to 256 appears on LCD). Use [D...
  • Page 63: Adjustment

    TK-782 ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifications 1. Standard Signal Generator Frequency Range 217 to 235MHz (SSG) Modulation Frequency modulation and external modulation Output –127dBm/0.1µV to greater than –7dBm/100mV 2. Power Meter Input Impedance 50Ω Operation Frequency...
  • Page 64 TK-782 & – 1 : BLC 2 : PSB 3 : E 4 : PTT 5 : ME 6 : MIC 7 : HOOK 8 ; CM...
  • Page 65 Repair Jig (Chassis) • EEPROM Use jig (Part No. : A10-4010-02) for repairing the TK-782. The tuning data (Deviation, Squelch, etc.) for the The jig facilitates the voltage check when the voltage on the EEPROM, is stored in memory. When parts are changed, component side TX-RX unit (A/2) is checked during repairs.
  • Page 66 TK-782 PRIORITY AUXILIAY BUSY/ VOLUME TX LED MONITOR SERVICE HANDSET VOLUME SOURCE DOWN DISPLAY SCAN MAIL CHANNEL UP TX-RX UNIT (A/2) CHANNWL DOWN CALL CALL TC101 MODULAR PROGRAMMABLE L202 MIC JACK FUNCTION KEYS ALPHANUMERIC PLL/VCO DISPLAY L203 L204 TC102 "...
  • Page 67 TK-782 ADJUSTMENT Receiver Section Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 1. Discriminator 1) Set test mode Rear TX-RX L6 AF output voltage CH : CH1 - Sig1 panel (A/2) maximum. SSG output : –53dBm AF VTVM AF : 1.4V/4Ω...
  • Page 68 TK-782...
  • Page 69 TK-782 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 3) “nH LRSI” Writing values only. SSG freq’ : 234.950MHz AF VTVM Distortion (EXT.SP) 4) “wL LRSI”, “wC LRSI”, “wH LRSI” meter SSG freq’ : Same as Oscilloscope narrow adjustment.
  • Page 70 TK-782...
  • Page 71 TK-782 ADJUSTMENT Transmitter Section Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 1. Frequency 1) Set test mode Power meter Rear Check 226.100MHz±100Hz Select “FREQ” in tuning mode. F. counter panel PTT : ON ± 0.5W 2.
  • Page 72 TK-782...
  • Page 73 TK-782 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment 7. Maximum 1) Set test mode Power meter Rear 4.1kHz (Wide) +0Hz/–50Hz (Wide/Narrow) deviation Connect AG to the MIC Deviation panel 2.05kHz (Narrow) terminal. meter (According to the Select “MAX”...
  • Page 74 TK-782...
  • Page 75 TK-782 ADJUSTMENT Measurement Adjustment Item Condition Specifications/Remarks Test- Unit Terminal Unit Parts Method equipment ± 0.2kHz (Wide) 11. DTMF 1) Set test mode Power meter Rear 3.0kHz (Wide) ± 0.1kHz (Narrow) deviation Select “n DTMF” in tuning mode. Deviation panel 1.5kHz (Narrow)
  • Page 76 TK-782...
  • Page 77: Terminal Function

    TK-782 TERMINAL FUNCTION CN7 (TX-RX Unit A/2) ← → CN502 (TX-RX Unit B/2) CN101 (PLL/VCO) ← → TX-RX Unit A/2 Pin No. Name Function Pin No. Name Function Wide/Narrow. H : Wide Switched transmit input. H : Transmit TX/RX switch. H : Receive RF output.
  • Page 78 TK-782...
  • Page 79: Pc Board Views

    TK-782 PC BOARD VIEWS / PC PLL/VCO (X58-4712-71) Component side view (J72-0732-02) J72-0732-02 CN101 L110 L103 R101 C122 L105 C134 C104 R105 L106 C136 R116 Q105 C127 R107 Q106 C138 R108 Q101 R109 C114 R103 C135 C129 Q104 C111 C125...
  • Page 80 TK-782 PC BOARD VIEW / PC TX-RX UNIT (X57-6143-01) (A/2) Component side view (J72-0724-22 A/2) Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Q403 IC10 IC11 D206 IC14 Q300 D207 Component side IC202...
  • Page 81 TK-782 TX-RX UNIT (X57-6143-01) (A/2) Foil side view PC BOARD VIEW / PC Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address (J72-0724-22 A/2) IC13 Q26 10C IC15...
  • Page 82: Tx-Rx Unit (X57-6143-01) (A/2)

    TK-782 PC BOARD VIEW / PC TX-RX UNIT (X57-6143-01) (A/2) Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Ref. No. Address Component side view + Foil side (J72-0724-22 A/2)
  • Page 83: Tx-Rx Unit (X57-6143-01) (B/2)

    TK-782 PC BOARD VIEWS / PC TX-RX UNIT (X57-6143-01) (B/2) Component side view (J72-0724-22 B/2) J72-0724-22 B/2 D512 R514 D517 R710 R517 C712 R510 C527 C710 C518 C583 R526 R713 L507 R525 IC710 R682 IC502 C524 R572 D511 IC501 IC508...
  • Page 84 TK-782 PC BOARD VIEW / PC TX-RX UNIT (X57-6143-01) (B/2) Component side view + Foil side (J72-0724-22 B/2) J72-0724-22 B/2 D512 R520 R514 D517 R710 C607 C712 R517 MPTT C516 R518 R510 C515 C527 C710 C518 C583 R525 RXAO R521...
  • Page 85: Schematic Diagram

    TK-782 SCHEMATIC DIAGRAM / Note : Components marked with a dot (·) are parts of layer 1.
  • Page 86 TK-782 SCHEMATIC DIAGRAM / Note : Components marked with a dot (·) are parts of layer 1.
  • Page 87: Block Diagram

    TK-782 TK-782 TK-782 BLOCK DIAGRAM /...
  • Page 88: Level Diagram

    TK-782 TK-782 LEVEL DIAGRAM / Receiver Section / –99.5dBm –95.0dBm –88.0dBm –94.5dBm –118.0dBm –121.0dBm –109.0dBm –106.5dBm –110.0dBm –120.5dBm 62mVrms 30mVrms 820mVrms 820mVrms 16mVrms 0.45Vrms SG input level for 12dB SINAD are obtained measured by AF VTVM connecting SG to each point via a 0.01µF capacitor.
  • Page 89: Specifications

    TK-782 SPECIFICATIONS GENERAL Frequency Range ........220 to 235MHz Number of Channels ......... Maximum 250 channels Channel Spacing ........25kHz/12.5kHz PLL Channel Stepping ......12.5kHz Input Voltage ..........13.6V DC± 15% negative ground Current Drain ..........Standby : Less than 260mA (w/back light off) Receive : Less than 700mA (4W @ 4Ω)
  • Page 90 TK-782 E37-0855-15 E37-0854-15 (CN2) (CN1) 1 : AM 1 : DEO 2 : MM 2 : AHK 3 : (NC) 3 : DTC 4 : DI (CN4) 5 : ME 1 : LOK 6 : MI 7 : PTT 2 : RXD1...
  • Page 91 Leuvensesteenweg 248 J, 1800 Vilvoorde, Belgium KENWOOD ELECTRONICS FRANCE S.A. 13, Boulevard Ney, 75018 Paris, France KENWOOD ELECTRONICS U.K. LIMITED KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB United Kingdom KENWOOD ELECTRONICS EUROPE B.V. Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands KENWOOD ELECTRONICS ITALIA S.p.A.

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