Kenwood-TK-981-Service-Manual电路原理图.pdf

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1、 2001-9 PRINTED IN JAPANB51-8588-00 (N)1016800MHz/900MHz FM TRANSCEIVERTK-980/981SERVICE MANUALGENERAL . 2OPERATING FEATURES . 3REALIGNMENT. 13INSTALLATION. 16CIRCUIT DESCRIPTION. 25SEMICONDUCTOR DATA. 29DESCRIPTION OF COMPONENTS . 30PARTS LIST. 32EXPLODED VIEW . 41PACKING . 42ADJUSTMENT . 43PC BOAR

2、D VIEWSPLL/VCO (X58-4530-XX) . 50TX-RX UNIT (X57-6520-XX) (A/2) . 51TX-RX UNIT (X57-6520-XX) (B/2). 57SCHEMATIC DIAGRAM . 61BLOCK DIAGRAM. 69LEVEL DIAGRAM. 72TERMINAL FUNCTION . 74SPECIFICATIONS. 75CONTENTSMicrophone(T91-0621-05)Cabinet (Upper)(A01-2165-23)Panel assy(A62-0991-03)Key top(K29-5284-02)

3、SUPPLEMENTThis service manual applied to products with 30600001 or subsequent serial numbers.In terms of the products with the serial numbers earlier than 30600001, refer to the TK-980/981 service manual as perpart No. B51-8478-10.2TK-980/981GENERALINTRODUCTIONSCOPE OF THIS MANUALThis manual is inte

4、nded for use by experienced techni-cians familiar with similar types of commercial grade com-munications equipment. It contains all required service in-formation for the equipment and is current as of the publica-tion date. Changes which may occur after publication arecovered by either Service Bulle

5、tins or Manual Revisions,which are issued as required.ORDERING REPLACEMENT PARTSWhen ordering replacement parts or equipment informa-tion, the full part identification number should be included.This applies to all parts : components, kits, and chassis. Ifthe part number is not known, include the cha

6、ssis or kitnumber of which it is a part, and a sufficient description ofthe required component for proper identification.PERSONNEL SAFETYThe following precautions are recommended for person-nel safety : DO NOT transmit if someone is within two feet (0.6meter) of the antenna. DO NOT transmit until al

7、l RF connectors are secure andany open connectors are properly terminated. SHUT OFF and DO NOT operate this equipment nearelectrical blasting caps or in an explosive atmosphere. All equipment should be properly grounded beforepower-up for safe operation. This equipment should be serviced by only qua

8、lifiedtechnicians.PRE-INSTALLATION CONSIDERNATIONS1. UNPACKINGUnpack the radio from its shipping container and checkfor accessory items. If any item is missing, please contactKENWOOD immediately.2. LICENSING REQUIREMENTSFederal regulations require a station license for each ra-dio installation (mobi

9、le or base) be obtained by the equip-ment owner. The licensee is responsible for ensuring trans-mitter power, frequency, and deviation are within the limitspermitted by the station license.Transmitter adjustments may be performed only by a li-censed technician holding an FCC first, second or general

10、class commercial radiotelephone operators license. Thereis no license required to install or operate the radio.3. PRE-INSTALLATION CHECKOUT3-1. IntroductionEach radio is adjusted and tested before shipment. How-ever, it is recommended that receiver and transmitter op-eration be checked for proper op

11、eration before installation.3-2. TestingThe radio should be tested complete with all cabling andaccessories as they will be connected in the final installa-tion. Transmitter frequency, deviation, and power outputshould be checked, as should receiver sensitivity, squelchoperation, and audio output. Q

12、T equipment operationshould be verified.4. PLANNING THE INSTALLATION4-1. GeneralInspect the vehicle and determine how and where theradio antenna and accessories will be mounted.Plan cable runs for protection against pinching or crush-ing wiring, and radio installation to prevent overheating.4-2. Ant

13、ennaThe favored location for an antenna is in the center of alarge, flat conductive area, usually at the roof center. Thetrunk lid is preferred, bond the trunk lid and vehicle chassisusing ground straps to ensure the lid is at chassis ground.4-3. RadioThe universal mount bracket allows the radio to

14、bemounted in a variety of ways. Be sure the mounting surfaceis adequate to support the radios weight. Allow sufficientspace around the radio for air cooling. Position the radioclose enough to the vehicle operator to permit easy accessto the controls when driving.4-4. DC Power and wiring1. This radio

15、 may be installed in negative ground electricalsystems only. Reverse polarity will cause the cable fuseto blow. Check the vehicle ground polarity before installa-tion to prevent wasted time and effort.2. Connect the positive power lead directly to the vehiclebattery positive terminal. Connecting the

16、 Positive lead toany other positive voltage source in the vehicle is not rec-ommended.CAUTIONIf DC power is to be controlled by the vehicle ignitionswitch, a switching relay should be used to switch the posi-tive power lead. The vehicle ignition switch then controlsDC to the relay coil.3. Connect th

17、e ground lead directly to the battery negativeterminal.4. The cable provided with the radio is sufficient to handlethe maximum radio current demand. If the cable must beextended, be sure the additional wire is sufficient for thecurrent to be carried and length of the added lead.3TK-980/98113+7613155

18、. INSTALLATION PLANNING CONTROL STATIONS5-1. Antenna systemControl station. The antenna system selection dependson many factors and is beyond the scope of this manual.Your KENWOOD dealer can help you select an antenna sys-tem that will best serve your particular needs.5-2. Radio locationSelect a con

19、venient location for your control station radiowhich is as close as practical to the antenna cable entrypoint. Secondly, use your systems power supply (whichsupplies the voltage and current required for your system).Make sure sufficient air can flow around the radio and powersupply to allow adequate

20、 cooling.SERVICEThis radio is designed for easy servicing. Refer to theschematic diagrams, printed circuit board views, and align-ment procedures contained in this manual.NoteWhen you modify your radio as described in system set-up, take the following precaution.The rating of pin 7 (SB) of the acces

21、sory connector cable(KCT-19) on the rear of the radio is 13.6V (1A). Insert a 1Afuse if you use the SB pin for external equipment.Accessory connectorcable (KCT-19)If you do not intend to use the 3.5-mm jack for the exter-nal speaker, fit the supplied speaker-jack cap (B09-0235-05)to stop dust and sa

22、nd getting in.GENERAL / OPERATING FEATURESSpeaker-jack cap(B09-0235-05)1. Operation FeaturesThe TK-980/981 is an 800MHz/900MHz band EFJ LTR -compatible trunked radio designed to operate in bothtrunking and conventional modes. The programmable fea-tures are summarized.This model can handle up to 32 s

23、ystems with up to 250groups in each system. The transceiver can be used in bothtrunked mode and conventional mode. Systems, groups,and their functions are programmed.2. Transceiver Controls and Indicators (Fig. 1)2-1. Front Panel ControlsAll the keys on the front panel are momentary-type pushbuttons

24、. The functions of these keys are explained below. POWER keyTransceiver POWER key. When the power is switchedoff, all the parameters, such as the system and group arestored in memory. When the power is switched on again,the transceiver returns to the previous conditions. SYSTEM UP/DOWN key (Programm

25、able) SCAN key (Programmable) MONITOR key (Programmable) A, B, C and D key (Programmable) VOLUME UP/DOWN key (Programmable) BUSY/TX LEDThe BUSY indicator (Green LED) shows that the group isin use. The TX indicator (Red LED) shows that you are trans-mitting.2-2. Programmable KeysThe FPU (KPG-49D) ena

26、bles programmable keys to se-lect the following functions.Auto tel, AUX-A, AUX-B (Only when voice scrambler isnot selected), DTMF ID (BOT), DTMF ID (EOT), Display char-acter, Emergency (Only foot key), Function, Group down,Group up, Home group, Horn alert, Key lock, Memory (RCL/STO), Memory (RCL), M

27、emory (STO), Message mode (OnlyA key), Monitor A, Monitor B, Monitor C, Monitor D, Publicaddress, Redial, Scan, Scan del/add, Scan temporary delete,Scrambler (Only when voice scrambler is selected), SendGPS, System down, System up, TEL disconnect, Volumedown, Volume up and None.These functions the F

28、PU programs to the function keysand described in the following sections. Auto TELAutomatically connects available repeaters that are con-nected to telephone circuits when operating as LTR system.The time allocated to search for available repeaters is 60seconds, after which connection failure occurs,

29、 a DTMFtone is output and the function terminates.If connection to an available circuit is made, only ID 253,EOT or hang-up time-out can terminate the function.4TK-980/981 AUX-AIf this key is pressed, “AUX” icon lights on the LCD andAUX port which is inside of the transceiver turns to the highlevel.

30、 If pressed again, the “AUX” icon goes off and theAUX ports turns to the lower level. AUX-BThis function can be programmed when the voice scram-bler board is not installed.If this key is pressed, an underscore (“_”) appears at theextreme right of the LCD and AUX port which is inside of thetransceive

31、r turns to the active level. If pressed again, theunderscore disappears and the AUX ports turns to thedeactive level. DTMF ID (BOT)In conventional mode, if you press this key, a predeter-mined DTMF ID (Begin of TX) will be sent automatically. DTMF ID (EOT)In conventional mode, if you press this key,

32、 a predeter-mined DTMF ID (End of TX) will be automatically sent. Display characterThis key switches the LCD display between the systemand group number and the system and group name. EmergencyPressing this key for longer than the programmed “Emer-gency Key Delay Time” causes the transceiver to enter

33、 theemergency mode. The transceiver jumps to the pro-grammed “Emergency system and group” and transmits forthe programmed “Active Time”.The transceiver disables mic mute while transmitting.After finishing transmission, the transceiver receivers forthe programmed “Interval Time”. The transceiver mute

34、sthe speaker while receiving. Following the above sequence,the transceiver continues to transmit and receive. FunctionPressing this key causes the transceiver to display“FCN”. Then, pressing a microphone DTMF key causes thecorresponding programmed function to start. This key maybe convenient when us

35、ing many functions with the micro-phone 12-key keypad. Group Up/DownWhen the key is pressed each time, the group number tobe selected is incremented/decremented and repeats if heldfor one second or longer. Home GroupEach pressing of the key selects a preset system/group.OPERATING FEATURES Horn Alert

36、If you are called from the base station using DTMF whileyou are away from your transceiver, you will be alerted bythe vehicle horn or some other type of external alert. To turnthe horn alert function on , press this key. A confirmationtone sounds, and the display shows “HA” on the sub LCD.If this ke

37、y is pressed again, the horn alert function isturned off. Key LockPressing this key causes the transceiver to accept entryof only the Function, Key lock, PTT, Monitor A, Moni-tor B, Monitor C, Monitor D, and Emergency keys. Message ModePress this key to enter the message mode. (See “Alpha-numeric Tw

38、o-way Paging Function” for details) MemoryThis key allows DTMF memory data to be recalled; up to32 memories each with a memory dial of up to 16 digits andan A/N of up to 10 digits per memory. MonitorUsed to release signalling or squelch when operating as aconventional. It is also used to reset optio

39、n signalling. Public AddressPublic address amplifies the microphone audio, and out-puts it through a PA speaker. PA is activated by pressingthis key. A confirmation tone sounds, and the displayshows “PUBLIC ADRS”. PA can be activated at anytime(scanning or non-scanning).The RADIO continues to scan h

40、owever, no RADIO transmissiontakes place.If this key is pressed again, a confirmation tone willsound, the display will return to the normal group or SCANdisplay, and the PA function will turn off. RedialIf you press this key when the system/group is displayed,the last transmitted DTMF code will appe

41、ar on the display.Pressing the PTT switch at this time will transmit the dis-played DTMF code. ScanPress this key starts scanning. Pressing this key stopsscanning. Scan Del/AddUsed to select whether system scan routines are usedduring system scan. Each pressing of the key (to ON)toggles between lock

42、out and lock. The scan routine isstarted when on lock. The DEL indicator flashes when thesystem is on lockout.5TK-980/981 Scan Temporary DeleteThis key is temporarily deleted a system being scanned.If you press this key when scan is stopped (when a call isbeing received from another station), the sy

43、stem is tempo-rarily deleted and scanning restarts.This key operates even when “Scan Type” is set to “ListType System Scan”. ScramblerIf a scrambler code (1 to 16) has been set in the FPU, anunderscore (“_”) appears at the extreme right of the LCDdisplay when scrambler is active. Pressing this key c

44、hangeson/off of scramble operation. Press this key for 2 secondsto enter scrambler code selection mode. Send GPS (Optional)Pressing this key causes the transceiver to send a singleGPS data. (GPS receiver must be installed.) System Up/DownWhen the key is pressed each time, the system numberto be sele

45、cted is incremented/decremented and repeats ifheld for one second or longer. Telephone DisconnectPressing this key ends an RIC connection (disconnectsthe telephone line). Volume Up/DownWhen the key is pressed, the volume level is increased/decreased and repeats if held for 200ms or longer. NoneSound

46、s error operation beep, and no action will occur.Use this function when the transceiver is required to bemore simple operated.2-3. Front Panel Displays and IndicatorsSub displayDisplays the system and group numbers. Also displaysvarious functions, such as TA.P (Priority) indicatorThe P indicator ( ) appears when a selected group is pro-grammed as priority, in conventional operation.MON (Monitor) indicatorThe MON indicator appears when the button pro-grammed as MONITOR is pressed.SVC (Service) indictorThis icon is not used this transceiver.SCN (Scan) ind