Kenwood-TK-2202-Service-Manual电路原理图.pdf

VHF FM TRANSCEIVERTK-2202/2206© 2004-2 PRINTED IN JAPANB51-8677-00 (S) 1246SERVICE MANUALGENERAL . 2SYSTEM SET-UP . 2REALIGNMENT . 3DISASSEMBLY FOR REPAIR . 5CIRCUIT DESCRIPTION . 8TERMINAL FUNCTION . 12SEMICONDUCTOR DATA . 12COMPONENTS DESCRIPTION . 13PARTS LIST . 14EXPLODED VIEW. 20PACKING . 21ADJUSTMENT . 23PC BOARDTX-RX UNIT (X57-6870-20) . 28SCHEMATIC DIAGRAM. 32BLOCK DIAGRAM . 36LEVEL DIAGRAM . 38KSC-31 / KNB-29N / KNB-30A / KBH-10 . 39SPECIFICATIONS .BACK COVERCONTENTSAntenna(T90-1036-05): TK-2202(K,M)(KRA-26: Option) TK-2206 (M)Knob (VOLUME)(K29-9309-03)Knob (PTT)(K29-9308-03)Cabinet assy(A02-3852-23)(8CH):TK-2202(K,M)(A02-3851-23)(16CH):TK-2206(M)Knob (CH-SELECTOR)(K29-9318-03)TK-2206 :Does not come with antenna.Antenna is available as an option.Photo is TK-2202.TK-2202/22062GENERAL / SYSTEM SET-UPSYSTEM 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-87D)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 5.0WTK-2202 (K,M)TK-2206 (M)Frequency range (MHz) RF power TypeUnitModel TX-RX Unit Frequency range Remarks& destinationTK-2202 K,MX57-6870-20 136174MHzIF1 : 38.85MHzTK-2206 M LOC : 38.4MHzINTRODUCTIONSCOPE 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.TK-2202/220632. How to Enter Each ModeMode OperationUser mode Power ONPC mode Received commands from PCClone mode PTT+Side2+Power ON (Two seconds)Mode 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-87D.Clone mode Used to transfer programming datafrom one radio to another.REALIGNMENT1. ModesUser modePC modePC test modeData programmingmodePC tuning modeREALIGNMENT3. PC Mode3-1. PrefaceThe TK-2202/2206 transceivers are programmed using apersonal computer, a programming interface (KPG-22) andprogramming software (KPG-87D).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-2202/2206 to the personal computer withthe interface 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-2202/2206 to PC mode, then attach theinterface cable.3-3. KPG-22 description(PC programming interface cable: Option)The KPG-22 is required to interface the TK-2202/2206 withthe computer. It has a circuit in its D-subconnector (25-pin)case that converts the RS-232C logic level to the TTL level.The KPG-22 connects the SP/MIC connector of the TK-2202/2206 to the computers RS-232C serial port.3-4. Programming software descriptionKPG-87D is the programming software for TK-2202/2206supplied 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-2202/2206 andedited on the screen. The programmed or edited data can beprinted out. 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-87DIBM-PCFig. 1Clone mode4. Clone Mode4-1. Outline“Clone Mode“ copies the transceiver data to anothertransceiver.The dealer can copy the transceiver data to anothertransceiver even without the use of a personal computer.4-2. ExampleThe transceiver can copy the programming data to one ormore transceivers via RF communication.The clone master and clone slave/s must be in Clone mode.4-3. Operation1. To switch the clone slave/s to Clone mode, press and holdthe PTT and side2 keys while turning the transceiverpower ON.2. Wait for 2 seconds. The LED will light orange and thetransceiver will announce “Clone“.3. Select a channel table number using Side1(incrementchannel table) and Side2(decrement channnel table) keys.TK-2202/22064Clone Frequency TableOperating FrequencyClone (MHz) 136174Frequency Table4. To switch the clone master to Clone mode, press and holdthe PTT and side2 keys while turning the transceiverpower ON.5. Wait for 2 seconds. The LED will light orange and thetransceiver will announce “Clone“.6. Select the same channel table number as the clone slave/s.7. Press PTT on the clone master to begin data transmission.When the clone slave starts to receive data, the LED willlight green.When the clone master finishes sending data, a“confirmation“ tone will sound.If data transmission fails while cloning, an “error“ tone willsound from the Slave unit.8. If the cloning fails, no data will be available in the Slave unitwhen it is returned to User mode.9. When the cloning is successful, the Slave unit's “Scan“ and“Key lock“ functions will return to their default values (Scan= OFF, Key lock = OFF).Notes: The dealer can clone data to two or more transceivers byrepeating the above procedures. If the transceivers Clone Mode is configured as “Disabled“,the transceiver cannot enter Clone mode. The table shown below will cover the frequency tables usedfor wireless cloning.Clone mode cannot be entered in battery low state.A unit cannot be a “Master Unit“ if it is unprogrammed. IfPTT is pressed, an “error“ tone will sound. The language used in cloning depends on the “Model type“setting, not the FPU setting. C, C2, C5 and C6 typeTK-3207 transceivers will use Chinese. Other types English. Once a unit is set to be the Master, it cannot be a slaveafter the data has been transmitted. This protects the datain the Master unit. Electronic interface may cause a failure in data transferduring Wireless Clone, such as when waveforms orelectromagnetics are being performed at the workbench. Clone mode can be used ONLY by the authorized servicepersonnel. The Clone mode setting must be configured as “Disable“before being delivered to the end-user. To clone, replace the antenna from both the mastertransceiver and the slave transceiver with a dummyload. The transmit output power is automatically set to Lowin Clone mode.REALIGNMENT1 136.0002 138.0003 140.0004 142.0005 144.0006 146.0007 148.0008 150.0009 152.00010 154.00011 156.00012 158.00013 160.00014 162.00015 164.00016 166.00017 168.00018 170.00019 172.00020 174.000TK-2202/22065DISASSEMBLY FOR REPAIR Removing the case assembly from the chassis.1. Remove the volume knob z and channel knob x.2. Remove the two screws c.3. Lift and remove the chassis from the case assembly v.(Use a flat-blade screwdriver to easily lift the chassis.) Removing the TX-RX unit from the chassis.1. Remove the packing bfrom the SP / MIC jack of the TX-RX unit.2. Remove the eleven screws nfixing the TX-RX unit.3. Remove the fixing bracket mof the SP / MIC.4. Remove the solder of the antenna terminal with a solderingiron ,.5. Remove the solder of the positive terminal with a solderingiron .Note: You can remove the TX-RX unit from the chassis withoutremoving the solder at the positive terminal. However,in this case, you can not attach the packing (G53-1605-03) that is on the positive terminal to the chassis inassembling. So, it is advisable to remove the solder onthe positive terminal first.6. Remove the FPC from the flat cable connector /.7. Lift and remove the TX-RX unit from the chassis .133429666661156667810 Removing the battery release lever from the caseassembly.1. Press the upper part of the lever toward the inside of thecase assembly. One side of the shaft will be removed z.2. Lift and remove the battery release lever from the caseassembly x. Attaching the battery release lever to the caseassembly.1. Insert one side of the shaft into the hole at the lever fittingsection on the case assembly z.Caution : The thin spring (G01-4543-04) should be positionedabove the two tabs of the lever.2. Tilt the battery release lever slightly forward x, so that thethick spring (G01-4542-04) is positioned below the casesurface.3. With the thick spring positioned below the case surface,attach the other side of the shaft to the case assembly bypressing the battery release lever cuntil it snaps into placev.Caution : Be careful not to tilt the battery release lever tooforward.If the battery release lever is pushed in this statewhere the two tabs come below the case surface,there is a possibility of damaging the two tabs.211324A thin springShaftTwo tabsA thick springTK-2202/22066 Cautions for assembly1. Attaching the positive terminal to the chassis.Always attach the positive terminal to the chassis, usingthe following procedures, before mounting the TX-RX unitonto the chassis.1. Remove the holder assembly xfrom the packing zofthe positive terminal.2. Mount the packing of the positive terminal into the chassishole c.3. Mount the holder assembly into the packing of the positiveterminal v.DISASSEMBLY FOR REPAIR Assembling the battery release lever1. Place the lever xonto the stopper z.2. Place the thick spring conto the lever.3. Hook the right and left ends of the thin spring vonto thetabs of the stopper, then place the thin spring onto thelever b.4. Slide the shaft through the hole of the stopper and levern.21342. Mounting the chassis to the case assembly.1. Confirm that the waterproof packing attached to thecircumference of the chassis is securely inserted in thegroove of the chassis z.2. Attach the speaker to the speaker recess of the caseassembly x. Make sure the speaker is securely inserted.4531623. Insert the upper part of the chassis into the case assemblyc.Caution: Take care that the speaker lead wire is not caughtby the microphone element.4. Press the chassis vand the case assembly together toattach them.Caution: If the packing of the SP / MIC does not come to thecorrect position after attaching the chassis to thecase assembly, reposition the packing with yourfingers.Confirm that thewaterproof packing issecurely inserted in thegroove of the chassis.12344TK-2202/220673. Attaching the antenna receptacle to thechassis.Screw the antenna receptacle to the chassis in the ordershown in the drawing so that the antenna receptacle comesto the center of the case hole.Tighten this screw first.Tighten this screw second.DISASSEMBLY FOR REPAIR4. The nuts of the volume knob and channelknobNote that the shapes, colors and heights of nuts of thevolume knob and channel knob are different from oneanother. (The nut of volume knob is silver, and the nut ofchannel knob is gold)Use the following jig when removing the nuts of thevolume knob and channel knob.Jig (Part No. : W05-1012-00)Volume Knob(Silver)Channel Knob(Gold)TK-2202/220685) Audio Amplifier CircuitThe demodulated signal from IC201 goes to AF amplifierthrough IC301.The signal then goes through an AF volume control , andis routed to an audio power amplifier (IC302) where it isamplified and output to the speaker.Fig. 3 Wide/Narrow switching circuitCIRCUIT DESCRIPTION1. Frequency ConfigurationThe receiver utilizes double conversion. The first IF is 38.85MHz 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, (D103,D104,D105and D106) passes through a BPF (L214 and L213), and isamplified by the RF amplifier (Q205).The resulting signal passes through a BPF (L209 and L211)and goes to the mixer. These BPFs are adjusted by variablecapacitors (D203,D204,D205 and D206). The input voltageto the variable capacitor is regulated by voltage output fromthe microprocessor (IC405).2) First MixerThe signal from the front end is mixed with the first localoscillator signal generated in the PLL circuit by Q1 toproduce a first IF frequency of 38.85 MHz.The resulting signal passes through the XF201 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 (XF201) to remove the adjacent channel signal.The filtered first IF signal is amplified by the first IF amplifier(Q203) and then applied to the lF system IC (IC201). TheIF system IC provides a second mixer, second localoscillator, lim