Kenwood-TK-272-G-Service-Manual电路原理图.pdf

VHF FM TRANSCEIVERTK-272G© 2000-11 PRINTED IN JAPANB51-8560-00(S) 790SERVICE MANUALGENERAL . 2SYSTEM SET-UP . 2OPERATING FEATURES . 3REALIGNMENT . 7DISASSEMBLY FOR REPAIR . 15CIRCUIT DESCRIPTION . 16SEMICONDUCTOR DATA . 20DESCRIPTION OF COMPONENTS . 22PARTS LIST. 23EXPLODED VIEW . 30PACKING . 31CONTENTSKey top (DTMF)(K29-9043-02)ADJUSTMENT . 32PC BOARD VIEWSDISPLAY UNIT (X54-3250-10) . 41TX-RX UNIT (X57-587X-XX) . 43SCHEMATIC DIAGRAM . 49BLOCK DIAGRAM . 53LEVEL DIAGRAM . 55KNB-14/KNB-15A (Ni-Cd BATTERY) . 56OPTIONS . 57SPECIFICATIONS . BACK COVERAntenna(KRA-14:Option)Knob (ENC)(K29-5331-03)Knob (VOL)(K29-5332-03)Cabinet assy(A02-3568-23)Knob (PTT)(K29-5334-13)Knob (Side1)(K29-5333-13)TK-272G2GENERAL / 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 of whichit is a part, and a sufficient description of the requiredcomponent for proper identification.PERSONNEL SAFETYThe 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 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 programmingAre you using the optional antenna?A personal computer (IBM PC or compatible), programminginterface (KPG-22), and programming software (KPG-56D)are required for programming.(The frequency, TX power HI/LOW, and signalling data are programmed for the transceiver.)YESNOKRA-14Helical antenna(Option)DeliveryAre you using the speaker microphone?YESNOKMC-17 or KMC-21Speaker microphone(Option)TX/RX 150174 5.0W TK-272G KFrequency range (MHz) RF power TypeTX/RX 136150 5.0W TK-272G K2UnitModel Opt DQT/ID+DTMF(2tone);OptOR Triggers at match with Triggers only for match withDTMF(2tone);Opt QT/DQT/ID;SignalingEven if set as OR, there is no Alert/Transpond just withDTMF.Even if set as OR, AF mute cannot be canceled just by amatch with DTMF.In conventional channels not set with QT/DQT, signaling isa match just by receiving the carrier.Auto ResetWhen Option Signaling matches on a Group channel whereit is set to Yes, Option Signaling is canceled when it matches agroup channel set to Yes.After Option Signaling matches, Option Signaling canautomatically Reset after a specified time.Dead Beat DisableWhen the D.B.D (Dead Beat Disable) code matches, apreset operation is performed.When D.B.D matches on all group channels regardless ofwhether Option Signaling = Yes/No, then TX Inhibit or TX RXInhibit is activated by the settings performed afterwards. D.B.Dis canceled when the D.B.D. code + “#“ is received.Transpond is always activated when the D.B.D codematches. Alert is not output. An Option Signaling match is notdisplayed.The transceiver is capable of having ID. The format is DTMF.The timing that the transceiver sends the ID isprogrammable.Begin of TX ID (BOT) : Begin of TX ID is sent at thebeginning of transmission.End of TX ID (EOT) : End of TX ID is sent at the end oftransmission.Both : Begin of TX ID is sent at the beginning of transmissionand End of TX ID is sent at the end of transmission.There is also a “PTT ID“ setting for each channel.3) Battery WarningThis transceiver has a battery warning feature. If low voltageis detected during transmission, the transceiver warns you bya flashing red “LED“.When the voltage is detected to be even lower duringtransmission, the transceiver stops transmission and warnsyou by a flashing red “LED“ and a beep.Please notice “indication“ for the battery exchange, chargingtime by flashing red LED and beep.4) “TOT“ Pre-AlertThe transceiver has a “TOT“ pre-alert timer. This parameterselects the time at which the transceiver generates a “TOT“pre-alert tone before the “TOT“ is expired.“TOT“ will expire when the selected time passes from theTOT pre-alert tone.5) “TOT“ Re-Key TimeThe transceiver has a “TOT“ re-key timer. This timer is thetime you cannot transmit after the “TOT“ is exceeded. Afterthe “TOT“ re-key time expires you can transmit again.6) “TOT“ Reset TimeThe transceiver has a “TOT“ reset timer. This timer is theminimum wait time allowed during a transmission that will resetthe “TOT“ count.“TOT“ reset time causes the “TOT“ to continue even afterthe PTT is released, unless the “TOT“ reset timer has expired.7) OST (Operator Selectable Tone)The transceiver is capable of having the “OST“ functionand 16 tone pairs (QT/DQT) with a max 10-digit name for eachtone pair.8) Clear to TranspondThe transceiver waits for an acknowledment signal until thechannel free.This feature ensures the acknowledment signal is receiveby another party.9) Battery SaveThis is the automatic battery saver during standby modeoperation. The receiver circuit is turned on and off to conservethe battery life.TK-272G7OPERATING FEATURES / REALIGNMENT7. Audible user feedback tonesThe transceiver outputs various combinations of tones tonotify the user of the transceiver operating state. The maintones are listed belowThe high tone is 1477Hz, the mid tone is 941Hz, and thelow tone is 770Hz. Power on toneThis tone is output when the transceiver is turned on. (Thehigh tone is output for 500ms.) Alert toneThis tone is output when the transceiver is in TX inhibitionfor TOT, battery warning and PLL unlocked. It is output untilthe PTT button is released. (The 697Hz tone is output.) Busy ToneThis informs the user of a busy channel lock out2000Hz 2000Hz 2000Hz100ms 100ms 100ms 100ms 100ms Group Call ToneThe group call tone informs the user of a group call in DTMF/2 Tone Option Signaling. This tone repeats 7 times. Individual ToneIndividual tone is issued on receiving selective call by DTMF/2 Tone Option Signaling.770Hz 770Hz30ms 30ms 30ms Pre Alert toneInforms the user when nearing transmit inhibit (transmitcutoff) time due to TOT.The Pre Alert Tone is issued from the time set for TOT PreAlert until the TOT triggers.1633Hz 1633Hz 1633Hz50ms 50ms 50ms 50ms 50ms2. How to Enter Each ModeMode OperationUser mode Power ONPanel test mode 2+Power ON (Two seconds)PC mode Received commands from PCPanel tuning mode Panel test mode+°Firmware programming mode Side1+Side2+Power ON(Two seconds)Clone mode Side1+3+Power ON(Two seconds)Self programming mode Side1+Power ON(Two seconds)REALIGNMENT1. ModesMode 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 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 FPU.See panel tuning.Firmware program- Used when changing the mainming mode program of the flash memory.Clone mode Used to transfer programming datafrom one radio to another.Self programming Frequency, signalling and features.modeUser modePanel test modePC modeFirmwareprogramming modeClone modeSelf programmingmodePanel tuning modePC test modeData programmingmodePC tuning mode3. For the panel Test ModeFor the setting method, refer to ADJUSTMENT.3-1. For the panel Tuning ModeFor the setting method, refer to ADJUSTMENT.4. ChecksumExecuting this function, “TUNING“ appears on the displayof TK-272G while calculating the checksum .When the calculation is completed, the display returns tonormal and PC displays the checksum of the radio.ChecksumTK-272G85. PC Mode5-1. PrefaceThe TK-272G transceiver is programmed using a personalcomputer, a programming interface (KPG-22) andprogramming software (KPG-56D).The programming software can be used with an IBM PCor compatible. Figure 1 shows the setup of an IBM PC forprogramming.5-2. Connection procedure1. Connect the TK-272G 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 transmitted from transceiver, the red LED blinks.When data is received by the transceiver, the green LED blinks.Notes: The data stored in the personal computer must match themodel type when it is written into the flash memory. Change the TK-272G to PC mode, then attach the interfacecable.Fig. 1IBM-PCKPG-56DGray SPMICGray/Black 1.5D-XV Lead wire1.5D-XV Shield wire Tuning cable(E30-3216-05)KPG-22RF Power meteror SSG-+-+REALIGNMENT5-3. KPG-22 description(PC programming interface cable: Option)The KPG-22 is required to interface the TK-272G 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-22 connects the SP/MIC connector of the TK-272G to the computers RS-232C serial port.5-4. Programming software descriptionThe KPG-56D programming disk is supplied in 3-1/2” diskformat. The software on this disk allows a user to program the TK-272G radios via a programming interface cable (KPG-22).5-5. Programming with IBM PCIf data is transferred to the transceiver from an IBM PCwith the KPG-56D, the destination data (basic radioinformation) for each set can be modified. Normally, it is notnecessary to modify the destination data because their valuesare determined automatically when the frequency range(frequency type) is set.The values should be modified only if necessary. Data canbe programmed into the flash memory in RS-232C format viathe universal connector.KPG-56D installation manual part No. : B62-1153-XX6. Firmware Programming Mode6-1. PrefaceFlash memory is mounted on the TK-272G. This allows theTK-272G to be upgraded when new features are released inthe future. (For details on how to obtain the firmware, contactCustomer Service.)6-2. Connection procedureConnect the TK-272G to the personal computer (IBM PCor compatible) with the interface cable (KPG-22). (Connectionis the same as in the PC Mode.)6-3. Programming1. Start up the programming software (KPG-56D), select“firmware program“ in the “Program“ item, and press theReturn key on your personal computer. This starts up thefirmware programmer.2. The top screen is displayed. Press any key to advance tothe next screen.3. Set the communications speed (normally, 57600 bps) andcommunications port in the Setup item.4. Set the firmware to be updated by File select (=F1).5. Hold down the Side1 and Side2 switches on the TK-272G,and press the power switch.When the Side1 and Side2 switches are held down fortwo seconds, “PROG576“ appears on the display andthe LED lights orange. When “PROG576“ is displayed,release the switches .6. Check the connection between the TK-272G and thepersonal computer, and make sure the TK-272G is inProgram mode.7. Press F10 on the personal computer. A window opens onthe display to indicate the writing progress. When the TK-272G begins to receive data, the LED lights green.8. When data is received successfully, a checksum appearson the display.9. If you want to continue programming other TK-272Gs,repeat steps 5 to 8.TK-272G9Notes:lTo start the Firmware Programmer from KPG-56D, theFpro path must be set up by the KPG-56D Setup.lThis mode cannot be entered if the Firmware Programmingmode is set to Disable in the Programming software (KPG-56D).lWhen programming the firmware, it is recommend to copythe data from the floppy disk to your hard disk before youupdate the radio firmware.Directly copying from the floppy disk to the radio may notwork because the access speed is too slow.6-4. Function1. If you press the Side2 switch while “PROGXXX“ isdisplayed, the checksum is displayed. If you press theSide2 switch again (while the checksum is displayed),“PROGXXX“ is redisplayed.2. A transmission speed can be selected by pressing the Side1switch while “PROGXXX“ is displayed.19200 bps: The LED flashes green and red alternately.38400 bps: The LED flashes orange.57600 bps: The LED lights orange.Note:Normally, write in the high-speed mode.7. Clone ModeProgramming data can be transferred from one radio toanother by connecting them via their SP/MIC connectors. Theoperation is as follows (the transmit radio is the master andthe receive radio is the slave).1. Turn the master TK-272G power ON with the Side1+3keys held down. The TK-272G displays “ CLONE “.2. Power on the slave TK-272G.3. Connect the cloning cable to the SP/MIC connectors onthe master and slave.4. Press the ° key on the master while the master displays“ CLONE “. The data of the master is sent to the slave.While the slave is receiving the data, “-PC-“ is displayed.When cloning of data is completed, the master displays“END“, and the slave automatically operates in the Usermode. The slave can then be operated by the same programas the master.5. The other slave can be continuously cloned. When the °key on the master is pressed while the master displays“END“, and the slave the master displays “ CLONE “.Carry out the operation in steps 2 to 4.Note: Use the new cloning cable for TK-272G.You cannot use the old cloning cable for TK-260/270.REALIGNMENTFig. 2Cloning cable 3.5 2.5 3.5 2.5GNDREMOTE/TXDPTT/RXD8. Self Programming ModeWrite mode for frequency dat