Kenwood-TK-2160-Service-Manual电路原理图.pdf

VHF FM TRANSCEIVERTK-2160© 2003-8 PRINTED IN JAPANB51-8652-00 (S) 1214SERVICE MANUALKnob (CH-SELECTOR)(K29-9280-13)Knob (VOLUME)(K29-9278-13)Cabinet assy(A02-3826-33)Knob (PTT)(K29-9279-03)Antenna(KRA-26: Option)GENERAL . 2SYSTEM SET-UP . 2OPERATING FEATURES . 3REALIGNMENT . 4DISASSEMBLY FOR REPAIR . 5CIRCUIT DESCRIPTION . 7INSTALLATION . 11TERMINAL FUNCTION . 12SEMICONDUCTOR DATA . 13COMPONENTS DESCRIPTION . 14PARTS LIST . 15EXPLODED VIEW. 23PACKING . 24ADJUSTMENT . 25PC BOARDTX-RX UNIT (X57-672X-XX) . 30SCHEMATIC DIAGRAM. 34BLOCK DIAGRAM . 38LEVEL DIAGRAM . 40KSC-30 . 41SPECIFICATIONS .BACK COVERCONTENTSDoes not come with antenna.Antenna is available as an option.TK-21602GENERAL / SYSTEM SET-UPINTRODUCTIONSCOPE OF THIS MANUALThis manual is intended for use by experienced techniciansfamiliar with similar types of commercial grade communicationsequipment. It contains all 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 information,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 ofwhich it is a part, and a sufficient description of the requiredcomponent for proper identification.PERSONAL SAFETYThe following precautions are recommended for personalsafety:DO NOT transmit until all RF connectors are verified secureand any open connectors are properly terminated.SHUT OFF and DO NOT operate this equipment nearelectrical blasting caps or in an explosive atmosphere.This equipment should be serviced by a qualified technicianonly.SERVICEThis radio is designed for easy servicing. Refer to theschematic diagrams, printed circuit board views, and alignmentprocedures contained within.SYSTEM SET-UPMerchandise receivedLicense and frequency allocated by FCCChoose the type of transceiverTransceiver programmingDeliveryAre you using the speaker microphone?A personal computer (IBM PC or compatible), programminginterface (KPG-22), and programming software (KPG-82D)are required for programming.(The frequency, TX power HI/LOW, and signalling data are programmed for the transceiver.)YESNOKMC-17 or KMC-21Speaker microphone(Option)Are you using the optional antenna?YESNOKRA-22 or KRA-26Optional antennaTX/RX 136174 5.0W TK-2160 (K,M)Frequency range (MHz) RF power TypeUnitModel TX-RX Unit Frequency range Remarks& destinationTK-2160 K,M X57-6720-10 136174MHzIF1 : 49.95MHzLOC : 50.4MHzTK-21603OPERATING FEATURES1. Operation FeaturesInstalling the (Optional) AntennaScrew the antenna into the connector onthe top of the transceiver by holding theantenna at its base and turning it clockwiseuntil secure.Installing the Belt ClipNote: When first installing the belt clip, you must remove thebattery pack from the rear of the transceiver.1 Remove the two screws from therear of the transceiver, then removethe small, plastic black covering thatwas held in place.2 Insert the belt clip mount into thespace on the rear of the transceiver.3 Using the 2 screws, affix the beltclip in place.Note: Do not dispose of the plasticblack covering! If you removethe belt clip, replace the coveringinto the space on the rear of thetransceiver. Either this coveringor the belt clip must be in place,otherwise the battery pack maynot remain installed properly.Installing the Cover over theSpeaker/ Microphone JacksNote: When installing the speaker/microphone jack cover, you mustremove the battery pack from therear of the transceiver.If you are not using a speaker/microphone, install the cover over thespeaker/ microphone jacks using thesupplied screw.Note: To lift the cover after it has been installed, use a pieceof hardened plastic or metal, such as a small screwdriver.Lift the cover by its tab, beside the screwhole, takingcare not to damage the cover.Installing the (Optional) Speaker/ MicrophoneNote: When installing the optionalspeaker/ microphone and itslocking bracket, you mustremove the battery pack fromthe rear of the transceiver.1 Insert the speaker/ microphoneplugs into the speaker/ microphonejacks.2 Attach the locking bracket using the supplied screw.Note: To lift the locking bracket after it has been installed,use a piece of hardened plastic or metal, such as a smallscrewdriver. Lift the bracket by its tab, beside thescrewhole, taking care not to damage the bracket.GETTING ACQUAINTEDThe transceiver is shown with the optional KNB-24L batterypack.qLED indicatorLights red while transmitting. Lights green while receiving.Flashes orange while receiving a 2-Tone, DTMF, orFleetSync signal that matches the one set up in yourtransceiver. If programmed by your dealer, flashes red whenthe battery power is low while transmitting.wChannel SwitchRotate to select a channel from 1 to 16.ePower switch/ Volume controlTurn clockwise to switch ON the transceiver. Rotate toadjust the volume. To switch OFF the transceiver, turncounterclockwise fully.rAUX keyThis is a PF (Programmable Function) key. Press it to activateits auxiliary function (page 4). The default setting for thiskey is None.tPTT (Push-to-Talk) switchPress this switch, then speak into the microphone to call astation.ySide 1 keyThis is a PF (Programmable Function) key. Press it to activateits auxiliary function (page 4). The default setting for thiskey is None.uSide 2 keyThis is a PF (Programmable Function) key. Press it to activateits auxiliary function (page 4). The default setting for thiskey is Squelch Off Momentary. Press each key to activateits auxiliary function.iSP/MIC jacksConnect an optional speaker/ microphone here.AntennaMicrophone Speaker41 2 35867TK-21604OPERATING FEATURES / REALIGNMENTProgrammable Auxiliary FunctionsThe AUX, Side 1, and Side 2 keys can be programmedwith the auxiliary functions listed below: 2-Tone Encode Emergency 1Monitor Momentary Monitor Toggle None RF Power LowScan Scan Temporary Delete Scrambler Squelch Off Momentary Squelch Off Toggle1This function can be programmed only on the AUX key.2. How to Enter Each ModeMode OperationUser mode Power ONPC mode Received commands from PC1. ModesMode FunctionUser mode For normal use.PC mode Used for communication between theradio and PC (IBM compatible).Data programming Used to read and write frequency datamode 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 KPG-82D.User modePC modePC test modeData programmingmodePC tuning modeREALIGNMENT3.PC Mode3-1. PrefaceThe TK-2160 transceiver is programmed using a personalcomputer, a programming interface (KPG-22) and programmingsoftware (KPG-82D).The programming software can be used with an IBM PCor compatible. Figure 1 shows the setup of an IBM PC forprogramming.3-2. Connection procedure1. Connect the TK-2160 to the personal computer with theinterface cable.2. When the POWER is switched on, user mode can beentered immediately. When the PC sends a command,the radio enters PC mode.When data is transmitting from the transceiver, the redLED lights.When data is received by the transceiver, the green LEDlights.Notes: The data stored in the personal computer must match themodel type when it is written into the EEPROM. Change the TK-2160 to PC mode, then attach the interfacecable.3-3. KPG-22 description(PC programming interface cable: Option)The KPG-22 is required to interface the TK-2160 with thecomputer. It has a circuit in its D-subconnector (25-pin) casethat converts the RS-232C logic level to the TTL level.The KPG-22 connects the SP/MIC connector of the TK-2160to the computers RS-232C serial port.3-4. Programming software descriptionKPG-82D is the programming software for TK-2160supplied on a CD-ROM. This software runs under Windows98, ME, Windows 2000 or XP on an IBM-PC or compatiblemachine.The data can be input to or read from TK-2160 and editedon the screen. The programmed or edited data can be printedout. It is also possible to tune the transceiver.Tuning cable(E30-3216-05)RF Power meteror SSGGray +Gray/Black 1.5D-XV Lead wire +1.5D-XV Shield wire SPMICKPG-22KPG-82DIBM-PCFig. 1TK-21605DISASSEMBLY FOR REPAIR/,Packing1. Separating the case assembly from the chassis.1. Remove the volume knob z.2. Remove the two screws x.3. Lift the chassis c,and remove it from the case assembly.Note: After separating the case assembly from the chassis,remove the channel knob.2. Separating the chassis from the TX/RX unit.1. Remove the two screws vfixing the TX/RX unit B/2.2. Remove the twelve screws band two screws nfixingthe TX/RX unit A/2.3. Remove the solder from the antenna terminal using asoldering iron m, then lift the unit off.zxxcChannel knobm,.vvbbbbbbbnTX/RX UNIT B/2TX/RX UNIT A/23. How to remove the battery terminal block.1. Remove the two screws /, then pull out the back cover .2. Remove the screw .Note: To remove the TX/RX unit B/2, remove the solder usinga soldering iron .Note: The two screws nof TX/RX unit A/2 are fixing thebattery terminal block ,.TK-21606AssemblingInstallation of battery terminal block andpackingInstall them so that no distortion or deformation occurs.Installation of speakers and cushion, and wirestyling of speakersInstall the speakers so that they do not protrude from thecushion. Perform the wire styling of speakers as shown in aphotograph. Attaching the cushionAttach the cushion as shown in Fig. 1.Note: Cushion must not cover the screws A,B and C.DISASSEMBLY FOR REPAIRInstall the cushionaccording to theguide.Installation of chassis and cabinet assyWire StylingBACFig. 1Take screw B andMIC edge as referenceline when sticking.G13-2018-04Stick between screwA and B.G13-2017-04G13-2020-04Do not press this area, toppacking easily deform.Second, press down the Chassis to thecabinet assy as shown in the diagram.Good Condition NG ConditionAfter mount, packingshould be in thiscondition.Packing deform.Packing protruded out.Note: Take care that the packing does not protrude from thechassis or case. Replace the protruded or deformed packing with a new one.First, mount the set to the cabinet assy.TK-216075) Audio Amplifier CircuitThe demodulated signal from IC401 is amplified by IC602,and goes to AF amplifier through IC601.The signal then goes through an AF volume control(VR801), and is routed to an audio power amplifier (IC605)where it is amplified and output to the speaker.Fig. 3 Wide/Narrow switching circuitCIRCUIT DESCRIPTION1. Frequency ConfigurationThe receiver utilizes double conversion. The first IF is 49.95MHz and the second IF is 450 kHz. The first local oscillatorsignal is supplied from the PLL circuit.The PLL circuit in the transmitter generates the necessaryfrequencies. Fig. 1 shows the frequencies.Fig. 1 Frequency configuration1) Front End (RF AMP)The signal coming from the antenna passes through thetransmit/receive switching diode circuit, (D204,D206,D208and D212) passes through a BPF (L411 and L412), and isamplified by the RF amplifier (Q404).The resulting signal passes through a BPF (L407 and L409)and goes to the mixer. These BPFs are adjusted by variablecapacitors (D402,D403,D404 and D405). The input voltageto the variable capacitor is regulated by voltage output fromthe microprocessor (IC805).2) First MixerThe signal from the front end is mixed with the first localoscillator signal generated in the PLL circuit by Q403 toproduce a first IF frequency of 49.95 MHz.The resulting signal passes through the XF401 MCF to cutthe adjacent spurious and provide the opitimuncharacteristics, such as adjacent frequency selectivity.Fig. 2 Receiver section2. ReceiverThe frequency configuration of the receiver is shown in Fig. 2.3) IF Amplifier CircuitThe first IF signal is passed through a four-pole monolithiccrystal filter (XF401) to remove the adjacent channel signal.The filtered first IF signal is amplified by the first IF amplifier(Q402) and then applied to the lF system IC (IC401). TheIF system IC provides a second mixer, second localoscillator, limiting amplifier, quadrature detector and RSSI(Received Signal Strength Indicator). The second mixermixes the first IF signal with the 50.4MHz of the secondlocal oscillator output (TCXO X1) and produces the secondIF signal of 450kHz.The second IF signal is passed through the ceramic filter(CF401) to remove the adjacent channel signal. The filteredsecond IF signal is amplified by the limiting amplifier anddemodulated by the quadrature detector with the ceramicdiscriminator (CD401). The demodulated signal is routedto the audio circuit.4) Wide/Narrow Switching CircuitNarrow and Wide settings can be made for each channelby switching the demodulation level.The WIDE (high level) and NARROW (low level) data isoutput from IC805, pin 54.When a WIDE (high level) data is received, Q401 turn off.When a NARROW (low level) data is received, Q401 turn on.Q401 turns on/off with the Wide/Narrow data and theIC401 detector output level is switched to maintain aconstant output level during wide or narrow signals.SPBPFIC602AF AmpIC601IC605AF PAIC401IF,MIX,DETANTAQUACF401TCXOTUNEQ4X3 multiplyTUNEANT SWBPFMCF1st LocalRF AMP Q404MIXERQ403 XF401IF AMPQ402AF VOLX116.8MHz2nd LocalQ401H : WideL : NarrowC409W/NR408R409 CD401IFOQUADIC401FM IF SYSTEM5RAFOUTQ402SPTX: 136 174MHz (K,M)PLLVCOIF SYSTEMANTTCXOX3 multiply49.95MHzMCFAFAMPMICMICAMPTXAMPRFAMP50.4MHzCF450kHzRX: 185.95 233.95MHz (K,M)TX/RX: 136 174MHz (K,M)16.8MHzRFAMPANT SWTK-21608RECEIVE SIGNALINGSPQ608SWIF AmpFM IF IC401IC602IF AmpIC601IC605AF PAIC805IC603BPF & COMPALATERQ603,604,607SWQT/DQT2-TONEDTMFCLK,DATA,STD,LOADNSIGNALSP MUTEHSDILSDI AN SQLCPUAQUACIRCUIT DESCRIPTIONFig. 5 AF amplifier and squelch6) Tone Volume Fixed CircuitThis function generates a TONE signal sound even if theAF volume of the transceiver is the minimum.A TONE signal is sent through Q602 to the AF amplifierwhen, in the FPU, “TONE Volume Fixed” is set to ON.7) SquelchPart of the AF signal from the IC enters the FM IC (I