Kenwood TK-940 service manual

Page 63
Page 62 Page 64
Image 63
Page 62 Page 64
Contents FX-R%~?ONIT1x57-4590-XXI BIZ $@$, ~\, !? .- $LU~CO .i@&4170-XXGeneral TestingRadio DC Power and wiringInstallation Planning Control Stations 5-1. Antenna system AntennaSystem SET-UP Operating Features Busy indicator Front Panel Displays and Indicators System displayScan indicator Delete 1 indicatorDetails of Features Last call revert Time-Out TimerTEL ID Codes TEL Mode SystemIGroup RevertPreferred System Revert Free System RingbackSystem Search TranspondProceed tone Delay toneAuto TEL Audible User Feedback TonesTalk-around Transmit disable receive-only channelsCall indicator, alert tone Conventional System OperationSystem Scan Type Fix system scan Horn AlertNon-continuous ContinuousKPG-4 Description Optional PC programming interface cable Data Program ModeTransceiver Programming Ir 4-1.lntroductionSystem key Clone Mode FigureDealer mode Description of Each ModesScan key Panel Tuning ModeVolume key Group keyKDD-4assembly Installing the Signaling Unit KDD-4 Dtmf OptionInstalling the KDD-4 in the transceiver InstallationJU3 JUJ Mute Urimute Accessory Connection Cable KCT-19 OptionJumper setup charts Monireset ON-HOOK OFF-HOOK JU2GND Terminal functionModifying the transceiver Connecting the KCT-18 to the transceiverR5 and R6 setup chart Ignition Sense Cable KCT-18 OptionKES-4 Option Connection procedureExternal Speaker KES-3 OptionFitting the Control Panel Upside Down Page Page Page Page PLL MIC AMP RF unitIf unit MCF ANT AMP If System -AMPSPAudio amplifier unit Squelch circuit Microphone amplifier DET Invsw PLLBuff IRF AMP VcxoControl unit Power supply circuit PLL data outputHorn control Tone generator LCD AssemblyPower switch circuit CPUTerminal connection diagram Block diagramDEC DIN Terminal connection diagram Terminal functionEeprom AT24C02NlOS12.7 TX-RX Unit IC201 TestMicroprocessor 78312AGF3563BE TX-RX Unit IC209 Microprocessor 75308BGK740BE9 LCD Assy IC2 CLK Output aTEST2 TEST1 DTA114YU NJM78L05UAEeprom DTA114EU--DCLCD Assy B38-0731-05 Rating wattage Cc4riqKusa TK-940/941Icpqwer Modulej .. Drive TX-RX Tapttte Screw A T Head T a P T T I E Sciiewpannel Screw SETInsulating Tube ANT Cable Speaker 16 QHM 1W Micrqphqnb Y4UW w w W W 1 W l U P F I P C X E D CUuupi U U P FR c Hesbnatuh ES $j Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Pattern Page Foil side IC20E Dtci 14EU DTCI44EU Page Page Component side PC Board View ~ o h ~ o n esident Page TX-RX Unit TX-RX Section X57 4590 XX A/2 11 TK A1 PLL O w m o d +4- aLIE- - aIz23z= Page Ccrl--------ASSYDISPLAY S~ECTION838 Eqqzj

TK-940 specifications

The Kenwood TK-940 is a highly regarded mobile two-way radio that has earned a reputation for its ruggedness, reliability, and excellent communication capabilities. Designed for professionals in various sectors such as public safety, transportation, and construction, the TK-940 incorporates advanced technologies to meet the demanding needs of users in the field.

One of the standout features of the TK-940 is its robust design, which complies with military specifications for durability. Its construction allows it to withstand harsh environmental conditions, making it suitable for outdoor and challenging work environments. The radio is also equipped with a water-resistant casing, ensuring that it can function reliably even in wet conditions.

The TK-940 operates in the VHF frequency range, providing wide coverage and strong signal penetration. With a power output of up to 110 watts, users can achieve long-range communication, essential for coordinating activities over large areas. The radio supports both analog and digital modes, allowing seamless integration into various communication systems while maintaining high audio clarity.

Another significant feature of the TK-940 is its enhanced audio quality. The radio is equipped with Kenwood's advanced noise cancellation technology, which minimizes background noise and ensures clear voice communication even in noisy environments. The audio output is powerful and adjustable, catering to individual user preferences.

Moreover, the TK-940 supports a variety of signaling options, includingDTMF, MDC-1200, and 2-Tone/5-Tone signaling, facilitating efficient communication. These signaling features enhance interoperability with other communication devices and systems, allowing users to communicate seamlessly with teams or dispatch centers.

Kenwood has also incorporated user-friendly functionalities into the TK-940. It boasts an intuitive user interface with programmable buttons, enabling quick access to essential features. The large, backlit display provides clear visibility and is easy to read in various lighting conditions.

The TK-940 is designed with safety in mind, featuring emergency alerts and lone worker protection, ensuring users can communicate their status in critical situations. Overall, the Kenwood TK-940 is a powerful and versatile mobile radio that combines durability, advanced technology, and user-friendly features, making it an ideal choice for professionals who require reliable communication in the field.
Top Page Image Contents