Kenwood-TK-2140-Service-Manual电路原理图.pdf

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1、VHF FM TRANSCEIVERTK-2140 2001-10 PRINTED IN JAPANB51-8602-00 (S) 1022SERVICE MANUALGENERAL . 2SYSTEM SET-UP . 2OPERATING FEATURES . 3REALIGNMENT . 4CIRCUIT DESCRIPTION . 6SEMICONDUCTOR DATA . 12DESCRIPTION OF COMPONENTS . 13PARTS LIST. 14EXPLODED VIEW . 21PACKING . 22ADJUSTMENT . 23TERMINAL FUNCTIO

2、N . 32PC BOARD VIEWSTX-RX UNIT (X57-6400-10) . 33SCHEMATIC DIAGRAM . 43BLOCK DIAGRAM . 47LEVEL DIAGRAM . 49KSC-25. 50KNB-24L,KNB-25A,KNB-26N,KRA-22 . 53SPECIFICATIONS .BACK COVERCONTENTSKnob (ENC)(K29-9134-03)Knob (VOL)(K29-9133-03)Cabinet assy(A02-3653-04)Knob (PTT)(K29-9131-03)Antenna(KRA-22:optio

3、n)Key top(SW1,SW2)(K29-9132-03)Does not come with antenna.Antenna is available as an option.TK-21402GENERAL / SYSTEM SET-UPINTRODUCTIONSCOPE OF THIS MANUALThis manual is intended for use by experienced techniciansfamiliar with similar types of commercial grade communicationsequipment. It contains al

4、l required service information for theequipment and is current as of the publication date. Changeswhich may occur after publication are covered by either ServiceBulletins or Manual Revisions. These are issued as required.ORDERING REPLACEMENT PARTSWhen ordering replacement parts or equipment informat

5、ion,the full part identification number should be included. Thisapplies to all parts : components, kits, or chassis. If the partnumber is not known, include the chassis or kit number of whichit is a part, and a sufficient description of the requiredcomponent for proper identification.PERSONNEL SAFET

6、YThe following precautions are recommended for personnelsafety:lDO NOT transmit until all RF connectors are verified secureand any open connectors are properly terminated.lSHUT OFF and DO NOT operate this equipment nearelectrical blasting caps or in an explosive atmosphere.lThis equipment should be

7、serviced by a qualified technicianonly.SERVICEThis radio is designed for easy servicing. Refer to theschematic diagrams, printed circuit board views, and alignmentprocedures contained within.Merchandise receivedLicense and frequency allocated by FCCChoose the type of transceiverTransceiver programmi

8、ngDeliveryAre you using the speaker microphone?TX/RX 136174 5.0W TK-2140 KFrequency range (MHz) RF power TypeA personal computer (IBM PC or compatible), programminginterface (KPG-36), and programming software (KPG-74D)are required for programming.(The frequency, trunked system features, conventional

9、 system features, TX power HI/LOW, and signalling data are programmed for the transceiver.)YESNOKMC-25Speaker microphone(Option)SYSTEM SET-UPTK-21403OPERATING FEATURES1. Operation FeaturesThe TK-2140 is a VHF FM radio designed to operate inboth trunking format and conventional format. Theprogrammabl

10、e features are summarized.Model Trunking Format Trunking modeConventional Format Conventional moden Trunking FormatThis format can handle up to 32 systems with up to 250groups in each system. The transceiver can be used in bothtrunked mode and conventional mode. Systems, groups,and their functions a

11、re programmed.n Conventional FormatThis format can handle up to 250 groups with 250 channelsin each group.The transceiver can be used only in conventional mode.Groups, channels, and their functions are programmed.2. Transceiver Controls and Indicators2-1. Physical Layout1 Antenna connectorConnect an

12、 (optional) antenna here.2 Rotary encoderRotate this encoder to activate its programmable function.(System or Group Up/ Down in Trunking Format, and Groupor Channel Up/ Down in Conventional Format.) For furtherdetails, contact your dealer.3 POWER switch/ VOLUME controlTurn clockwise to switch ON the

13、 transceiver. Rotate toadjust the volume. Turn counterclockwise fully to switchOFF the transceiver.4 Transmit/ Battery low indicatorThis red LED lights during transmission. If programmed byyour dealer, when the battery pack power is low, the LEDflashes during transmission. Replace or recharge the ba

14、tterypack.5 Auxiliary (orange) keyPress to activate its auxiliary function page 13.6 Battery pack safety catchFlip this catch to prevent accidentally pressing the batterypack release latch.7 Battery pack release latchPress this latch to release the battery pack.8 PTT (Push-To-Talk) switchPress this

15、switch, then speak into the microphone to call astation.9 Side 1, Side 2 keysPress to activate their auxiliary functions.0 S, A, 2 B, and C3 keysPress to activate their auxiliary functions.- Universal connectorConnect the (optional KMC-25) speaker/ microphone here.Otherwise, keep the supplied cover

16、in place.2-2. Programmable keysKeys 2, 5, 8 and 9 can be programmed with the auxiliaryfunctions listed in the following table. The keys can only beprogrammed with functions, depending on whether you areusing Conventional Format or Trunking Format. Please contactyour dealer for further details on the

17、se functions.3257111084169noitcnuFlanoitnevnoCtamroFgniknurTtamroFenohpeleTotuAoNseYnwoDlennahCseYoNpUlennah e NnwoD/pUlennahC1se NretcarahCyalpsiDseYseY)TOB(DIFMT e eY)TOE(DIFMT e eYycnegremE2seYseYnwoDpuorGse eYpUpuor e eYnwoD/pUpuorG1seYseYlennahCemoHseYoNpuorGemoHoNseYkcoLyeKseYseYpmaLse eY)OTS/

18、LCR(yromeMse eY)LCR(yrome eYseY)OTS(yrome e eYedoMegasseM3se eYTK-214041. ModesREALIGNMENTMode FunctionUser mode For normal use.Panel test mode Used by the dealer to check thefundamental characteristics.Panel tuning mode Used by the dealer to tune the radio.PC mode Used for communication between the

19、radio and PC (IBM compatible).Data program- Used to read and write frequency dataming mode and other features to and from the radio.PC test mode Used to check the radio using the PC.This feature is included in the FPU.See panel tuning.Firmware program- Used when changing the mainming mode program of

20、 the flash memory.Clone mode Used to transfer programming datafrom one radio to another.Self programming Frequency, signalling and featuresmode (Conventional write to the radio.Format)Firmware version Firmware version number is displayedinformation mode on the LCD.User modePanel test modePC modeFirm

21、wareprogramming modeClone modeSelf programmingmode (ConventionalFormat)Panel tuning modePC test modeData programmingmodePC tuning modeFirmware VersionInformation mode2. How to Enter Each ModeMode OperationUser mode Power ONPanel test mode A+Power ON (Two seconds)PC mode Received commands from PCPane

22、l tuning mode Panel test mode+SFirmware programming mode S+Power ONClone mode C+Power ON (Two seconds)Self programming mode LAMP+Power ON(Conventional Format) (Two seconds)Firmware version information side 1 + Power ONmode (Two seconds)3. Panel Test ModeSetting method refer to ADJUSTMENT.4. Panel Tu

23、ning ModeSetting method refer to ADJUSTMENT.OPERATING FEATURES / REALIGNMENTnoitcnuFlanoitnevnoCtamroFgniknurTtamroFyratnemoMrotinoMseYseYelggoTrotino e eYenoNse eYenoTelbatceleSrotarepOseYoNlaideRseYseYwoLrewoPF e eYnacSse eYddA/leDnac eYseYeteleDyraropmeTnacSoNseYnoitaunettAPS4se eYleveLhcleuqSseY

24、oNyratnemoMffOhcleuq eYseYelggoTffOhcleuq e eYnwoDmetsySoNseYpUmetsy eYnwoD/pUmetsyS1o eYdnuorAklaTseYoNtcennocsiDenohpeleToNseYrotacidnI noitpircseDnirebmunpuorgrolennahcehtsyalpsiDpuorgrometsysehtdnaedomlanoitnevnoc.edomgniknurtnirebmun.nacSytiroirPgnimrofrepnehwsraeppAsademmargorpyekehtnehwsraepp

25、A rotinoM si.desserp.reviecsnartsihtnodesutonsinocisihT.nacSgnimrofrepnehwsraeppAsademmargorpyekehtnehwsraeppA rewoPFROL .desserpsi.metsysenohpeletehtgnisuelihwsraeppA.egassemaevahuoynehwsraeppApuorg/metsysehtroemanpuorgehtsyalpsiDstigid2gniniamerehT.stigid01otpuhtiwrebmun.srotacidnisuoiravrofdesuer

26、a2-3. Display1These functions can be programmed only on key 2, theencoder.2This function can be programmed only on key 5, theAuxiliary (orange) key.3This function can be programmed only on key 9s A key.4This function can be programmed only on the programmablefunction key of the optional KMC-25 speak

27、er/ microphone.TK-21405REALIGNMENT5.PC Mode5-1. PrefaceThe TK-2140 transceiver is programmed by using a personalcomputer, programming interface (KPG-36) and programmingsoftware (KPG-74D).The programming software can be used with an IBM PC orcompatible. Figure 1 shows the setup of an IBM PC forprogra

28、mming.5-2. Connection procedure1. Connect the TK-2140 to the personal computer with theinterface cable.2. When the POWER switch on, user mode can be enteredimmediately. When PC sends command the radio enter PCmode, and “PROGRAM” is displayed on the LCD.When data transmitting from transceiver, the re

29、d LED isblinking.When data receiving to transceiver, the green LED is blinking.Notes: The data stored in the personal computer must match modeltype, when it is written into the flash memory. Change the TK-2140 to PC mode, then attach the interfacecable.5-3. KPG-36 description(PC programming interfac

30、e cable: Option)The KPG-36 is required to interface the TK-2140 to thecomputer. It has a circuit in its D-subconnector (25-pin) casethat converts the RS-232C logic level to the TTL level.The KPG-36 connects the universal connector of the TK-2140 to the computers RS-232C serial port.5-4. Programming

31、software descriptionThe KPG-74D programming disk is supplied in 3-1/2” diskformat. The software on this disk allows a user to program TK-2140 radios via programming interface cable (KPG-36).5-5. Programming with IBM PCIf data is transferred to the transceiver from an IBM PC withthe KPG-74D, the dest

32、ination data (basic radio information)for each set can be modified. Normally, it is not necessary tomodify the destination data because their values aredetermined automatically when the frequency range (frequencytype) is set.The values should be modified only if necessary. Data canbe programmed into

33、 the flash memory in RS-232C format viathe universal connector.KPG-36IBM-PCKPG-74DFig. 16. Firmware Programming Mode6-1. PrefaceFlash memory is mounted on the TK-2140. This allows theTK-2140 to be upgraded when new features are released inthe future. (For details on how to obtain the firmware, conta

34、ctCustomer Service.)6-2. Connection procedureConnect the TK-2140 to the personal computer (IBM PC orcompatible) with the interface cable (KPG-36). (Connection isthe same as in the PC Mode.)6-3. Programming1. Start up the programming software (Fpro.exe).2. Set the communications speed (normally, 5760

35、0 bps) andcommunications port in the comfiguration item.3. Set the firmware to be updated by file name item.4. Turn the TK-2140 power ON with the S switch held down.When “PROG 57600“ appears, release your finger fromthe switch.5. Check the connection between the TK-2140 and thepersonal computer, and

36、 make sure that the TK-2140 Is inthe Program mode.6. Press write button in the window. A window opens on thedisplay to indicate progress of writing. When the TK-2140starts to receive data. the P icon is blinking.7. If writing ends successfully, the LED on the TK-2140 lightsand the checksum is displa

37、yed.8. If you want to continue programming other TK-2140 s,repeat steps 4 to 7.Notes:lThis mode cannot be entered if the Firmware Programmingmode is set to Disable in the Programming software (KPG-74D).lWhen programming the firmware, it is recommend to copythe data from the floppy disk to your hard

38、disk before updatethe radio firmware.Directry copying from the floppy disk to the radio may notwork because the access speed is too slow.6-4. Function1. If you press the Side 2 switch while “PROG 57600“ isdisplayed, the checksum is displayed. If you press the Side2 switch again while the checksum is

39、 displayed, “PROG57600“ is redisplayed.2. If you press the Side 1 switch while “PROG 57600“ isdisplayed, the display changes to “PROG 19200“ to indicatethat the write speed is low speed (19200 bps). If you pressthe Side 1 switch again while “PROG 19200“ is displayed,the display changes to “PROG 3840

40、0“, and the write speedbecomes the middle-speed mode (38400 bps). If you pressthe Side 1 switch again while “PROG 38400“ is displayed,the display returns to “PROG 57600“.Note:Normally, write in the high-speed mode.TK-21406Fig. 2 Receiver sectionIC200 MIX, DET, IFSWQ204DMIC300 (2/2)AF AMP5DE-EMPMUTEE

41、XPHPF LPF HPF BEFIC50021VOLIC307IC305 (2/2)AF AMP41VC1VC2Q308SSWINT.SPEXT.SP2nd localOSCX2SWIC313AF PAANTSWL113,114L115L215,217BPFD102,103D104,105Q207RF AMPANTQ2061st MIXQ2051st IFL210,213BPFXF202MCF1st LocalOSC (PLL)CF200 : WideCF201 : Narrow1. OverviewThis transceiver is VHF/FM portable transceive

42、r designedto operate in the frequency range of 136 to 174MHz (K) and aVHF/FM band EFJ LTRTMtrunked system compatible FMprotable transceiver that can be programmed to operate onboth LTR and conventional systems.2. Circuit Configuration by FrequencyThe receiver is a double-conversion superheterodyne w

43、itha first intermediate frequency (IF) of 44.85MHz and a secondIF of 455kHz. Incoming signals from the antenna are mixedwith the local signal from the PLL to produce the first IF of44.85MHz.This is then mixed with the 44.395MHz second localoscillator output to produce the 455kHz second IF. This isde

44、tected to give the demodulated signal.The transmit signal frequency is generated by the PLL VCO,and modulated by the signal from the microphone. It is thenamplified and sent to the antenna.ANTTX/RX : 136174MHz (K)ANTSWRFAMPPAAMPTXAMP1st MIXMCF44.85MHzCF455kHzFM IFSYSTEMAFAMPSP44.395MHz180.85218.85MH

45、z (K)PLLVCOMICAMPMIC136174MHz (K)Fig. 1 Frequency configuration3. Receiver System3-1. RF unitAn incoming RF signal from the antenna terminal is passedthrough the antenna switch (D102,103,104 and D105 are off)and then the bandpass filter (L215,217). The bandpass filter isadjusted by a variable capacitor. The input voltage to thevariable capacitor is regulated by the voltage output from theD/A converter (IC307). The signal is amplified by RF amplifier(Q207), and passed through the bandpass filter (L210,213).The resulting signal is applied to the first mixer (Q206), whereit is mixe