Kenwood-TK-270-G-Service-Manual电路原理图.pdf

VHF FM TRANSCEIVERTK-260G/270G© 1999-9 PRINTED IN JAPANB51-8493-00(S) 1425SERVICE MANUALGENERAL . 2SYSTEM SET-UP . 2OPERATING FEATURES . 3REALIGNMENT . 8DISASSEMBLY FOR REPAIR . 16CIRCUIT DESCRIPTION . 17SEMICONDUCTOR DATA . 21DESCRIPTION OF COMPONENTS . 23PARTS LIST. 24EXPLODED VIEW . 30CONTENTSKey top (DTMF)(K29-5330-02)TK-260GTK-270GPACKING . 32ADJUSTMENT . 33PC BOARD VIEWSDISPLAY UNIT (X54-3250-10) . 41TX-RX UNIT (X57-587X-XX) . 43SCHEMATIC DIAGRAM . 49BLOCK DIAGRAM . 57LEVEL DIAGRAM . 59KNB-14/KNB-15A (Ni-Cd BATTERY) . 60OPTIONS . 61SPECIFICATIONS . BACK COVERKnob (CHANNEL SELECTOR)(K29-5341-03)Knob (VOL)(K29-5332-03)Cabinet assy(A02-2391-23)Knob (PTT)(K29-5334-13)Antenna(T90-0679-05):MKnob (ENC)(K29-5331-03)Knob (VOL)(K29-5332-03)Cabinet assy(A02-2385-23)Knob (PTT)(K29-5334-13)M market models are shown.Knob (MONI)(K29-5333-13)Knob (MONI)(K29-5333-13)TK-260G/270G2GENERAL / 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.NOTEWE CANNOT guarantee oscillator stability when usingchannel element manufactured by other than KENWOOD orits authorized agents.UnitX57-587X-XX X54-325X-XXModel Opt DQT/ID+DTMF(2tone);OptOR Triggers at match with QT Triggers only for match with/DQT/ID+DTMF(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.TK-260G/270G82000Hz 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 50ms7. 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 out2. How to Enter Each ModeMode OperationUser mode Power ONPanel test mode 2+Power ON (Two seconds)(TK-270G only)PC mode Received commands from PCPanel tuning mode Panel test mode+Firmware programming mode LAMP+MONI+Power ON(Two seconds)Clone mode LAMP+3+Power ON(Two seconds)Self programming mode LAMP+Power ON(Two seconds) (TK-270G only)1. 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 mode(TK-270G only)PC modeFirmwareprogramming modeClone modeSelf programmingmode (TK-270G only)Panel tuning modePC test modeData programmingmodePC tuning modeOPERATING FEATURES / REALIGNMENTREALIGNMENT3. For the panel Test Mode (TK-270G only)For the setting method, refer to ADJUSTMENT.3-1. For the panel Tuning ModeFor the setting method, refer to ADJUSTMENT.ChecksumTK-260G/270G96. Firmware Programming Mode6-1. PrefaceFlash memory is mounted on the TK-260G/270G. Thisallows the TK-260G/270G to be upgraded when new featuresare released in the future. (For details on how to obtain thefirmware, contact Customer Service.)6-2. Connection procedureConnect the TK-260G/270G to the personal computer (IBMPC or compatible) with the interface cable (KPG-22).(Connection is 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 LAMP and MON switches on the TK-260G/270G, and press the power switch.When the LAMP and MON switches are held down fortwo seconds, “PROG576“ appears on the display andthe LED lights orange. When “PROG576“ is displayed,release the switches (TK-270G only).6. Check the connection between the TK-260G/270G andthe personal computer, and make sure the TK-260G/270Gis in Program mode.7. Press F10 on the personal computer. A window opens onthe display to indicate the writing progress. When the TK-260G/270G begins to receive data, the LED lights green.8. When data is received successfully, a checksum appearson the display.(Since the TK-260G does not have a display, check thechecksum with the FPU (KPG-56D).)Fig. 1REALIGNMENT4. ChecksumExecuting this function, “TUNING“ appears on the displayof TK-270G while calculating the checksum .When the calculation is completed, the display returns tonormal and PC displays the checksum of the radio.5.PC Mode5-1. PrefaceThe TK-260G/270G transceiver is programmed using apersonal computer, 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-260G/270G 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 transmitted from transceiver, the red LEDblinks.When data is received by the transceiver, the green LEDblinks.Notes: The data stored in the personal computer must match themodel type when it is written into the flash memory. Change the TK-260G/270G to PC mode, then attach theinterface cable.5-3. KPG-22 description(PC programming interface cable: Option)The KPG-22 is required to interface the TK-260G/270G tothe 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-260G/270G 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 programthe TK-260G/270G 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-XXTK-260G/270G10Fig. 2Cloning cableMBLPSBGNDPTT/RXDMEMICREMOTE/TXDCMGNDREMOTE/TXDPTT/RXD81189. If you want to continue programming other TK-260G/270Gs, repeat steps 5 to 8.Notes: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 MON switch while “PROGXXX“ isdisplayed, the checksum is displayed. If you press theMON switch again (while the checksum is displayed),“PROGXXX“ is redisplayed.2. A transmission speed can be selected by pressing theLAMP switch while “PROGXXX“ is displayed.12900 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-270G power ON with the LAMP+3keys held down. The TK-270G displays “ CLONE “.2. Power on the slave TK-260G/270G.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 oprates 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.REALIGNMENTNote: You can clone the programmed data between thetramsceiver listed below.Frequency version must be same.3.52.5GNDREMOTE/TXDPTT/RXD3.52.5Cloning cable parts No.E30-3410-05 (TK-270G TK-260G/270G)E30-3411-05 (TK-270G TK-760G/762G)Slave TK-260G TK-260G TK-760G TK-760GKMKMTK-270G TK-270G TK-762G TK-762GMasterKMKMTK-270GKTK-270GM