Kenwood-TK-760-Service-Manual电路原理图.pdf

(VHF FM TRANSCEIVERTK-760/762/HSERVICE MANUALTK-760JHCabinet (Upper)(AOl-2112-03)Panel assy Front glass(A62-0449-13) (810-1230-04)TK-762/HKENWOOD© 1996-5 PRINTED IN JAPANB51-8327-00 (N) 1382“-Key top (Rubber)(K29-5081-02)Front glass(810-1252-04)- .“. ;m:-Panel assy(A62-0450-13)Key top (Rubber)(K29-5081-02)TK-760/762/HCONTENTSGENERAL 3SYSTEM SET-UP : 5OPERATING FEATURES1. Transceiver Programming 6INSTALLATION1. Accessory Connection Cable (KCT-19 : Option) 72. Ignition Sense Cable (KCT-18 : Option) 93. PA/HA Unit (KAP-1 : Option) 104. DTMF Decode : 115. External Speaker 126. Fitting the Control Panel Upside Down 12REALIGNMENT1. Modes 132. How To Enter Each Mode 133. Panel Test Mode (TK-760 Only) 134. Panel Tuning Mode (TK-760 Only) 15BLOCK DIAGRAM 17LEVEL DIAGRAM : 19CIRCUIT DESCRIPTION1. Circuit Configuration by Frequency 202. Receiving System 203. Transmitter System 224. Frequency Synthesizer Unit 235. Display Section 246. Control Section 24SEMICONDUCTOR DATA 27DESCRIPTION OF COMPONENTS 31PARTS LIST 34EXPLODED VIEW 41PACKING 42ADJUSTMENT 43TERMINAL FUNCTION 49PC BOARD VIEWS I CIRCUIT DIAGRAMSVCO (X58-4360-XX) 50TX-RX UNIT: TX-RX (X57-4950-XX) (A/2): TK-760 I (X57-5100-XX) (A/2) : TK-762 51TX-RX UNIT: CONTROL (X57-4950-XX) (B/2) : TK-760 I (X57-5100-XX) (B/2) : TK-762 61KAP-1 (PA/HA UNIT) 71SPECIFICATIONS BACK COVER2TK-760/762GENERALINTRODUCTIONSCOPE OF THIS MANUALThis manual is intended for use by experiencedtechnicians familiar with similar types of commercialgrade communications equipment. It contains all re quired service information for the equipment and iscurrent as of the publication data. Changes which mayoccur after publication are covered by either ServiceBulletins or Manual Revisions. These are issued as re quired.ORDERING REPLACEMENT PARTSWhen ordering replacement parts or equipment in formation, the full part identification number should beincluded. This applies to all parts: components, kits, orchassis. If the part number is not known, include thechassis or kit number of which it is a part, and a suffi cient description of the required component for properidentification.PERSONNEL SAFETYThe following precautions are recommended forpersonnel safety: DO NOT transmit if someone is within two feet (0.6meter) of the antenna. DO NOT transmit until all RF connectors are verifiedsecure and any open connectors are properly termi nated. SHUT OFF and DO NOT operate this equipmentnear electrical blasting caps or in an explosive at mosphere. All equipment should be properly grounded beforepower-up for safe operation. This equipment should be serviced by a qualifiedtechnician only.FCC COMPLIANCE AND TYPE NUMBERSModel and Frequency TX Deviation Signalingdestination range (MHzl power IW) (kHz) OT DOT 2·TONE DEC DTMFENCTK-760 K 148-174 25 5/2.5 00 0 0TK-760 K2 136-156 25 5/2.5 00 0 0TK-762 K 148-174 25 5/2.50 0 0 0TK-762 K2 136-156 25 5/2.50 0 0 0TK-760H K 148-174 45 5/2.5 0 0 0 0TK-760H K2 136-156 45 5/2.5 0 00 0TK-762H K 148-174 45 5/2.5 0 00 0TK-762H K2 136-156 45 5/2.5 0 00 0PRE-INSTALLATION CONSIDERATIONS1. UNPACKINGUnpack the radio from its shipping container andcheck for accessory items. If any item is missing,please contact KENWOOD immediately.2. L1CI;NSING REQUIREMENTSFederal regulations require a station license for eachradio installation (mobile or base) be obtained by theequipment owner. The licensee is responsible for en suring transmitter power, frequency, and deviation arewithin the limits permitted by the station license.Transmitter adjustments may be performed only bya licensed technician holding an FCC first, second orgeneral class commercial radiotelephone operator's li cense. There is no license required to install or operatethe radio.3. PRE-INSTALLATION CHECKOUT3-1. IntroductionEach radio is adjusted and tested before shipment.However, it is recommended that receiver and trans mitter operation be checked for proper operation be fore installation.3-2. TestingThe radio should be tested complete with all cablingand accessories as they will be connected in the finalinstallation. Transmitter frequency, deviation, andpower output should be checked, as should receiversensitivity, squelch operation, and audio output.OT equipment operation should be verified.3TK-760/762GENERAL44. PLANNING THE INSTAllATION4-1. GeneralInspect the vehicle and determine how and wherethe radio antenna and accessories will be mounted.Plan cable runs for protection against pinching orcrushing wiring, and radio installation to prevent over heating.4-2. AntennaThe favored location for an antenna is in the centerof a large, flat conductive area, usually at the roof cen ter. The trunk lid is preferred, bond the trunk lid andvehicle chassis using ground straps to ensure the lid isat chassis ground.4-3. RadioThe universal mount bracket allows the radio to bemounted in a variety of ways. 8e sure the mountingsurface is adequate to support the radio's weight. Al low sufficient space around the radio for air cooling.Position the radio close enough to the vehicle operatorto permit easy access to the controls when driving.4-4. DC Power and wiring1. This radio may be installed in negative ground elec trical systems only. Reverse polarity will cause thecable fuse to blow. Check the vehicle ground polar ity before installation to prevent wasted time andeffort.2. Connect the positive power lead directly to the ve hicle battery positive terminal. Connecting the Posi tive lead to any other positive voltage source in thevehicle is not recommended.CAUTIONIf DC power is to be controlled by the vehicle ignitionswitch, a switching relay should be used to switch thepositive power lead. The vehicle ignition switch thencontrols DC to the relay coil.3. Connect the ground lead directly to the batterynegative terminal.4. The cable provided with the radio is sufficient tohandle the maximum radio current demand. If thecable must be extended, be sure the additional wireis sufficient for the current to be carried and lengthof the added lead.5. INSTALLATION PLANNING - CONTROL STATIONS5-1. Antenna systemControl station. The antenna system selection de pends on many factors and is beyond the scope of thismanual. Your KENWOOD dealer can help you selectan antenna system that will best serve your particularneeds.5-2. Radio locationSelect a convenient location for your control stationradio which is as close as practical to the antenna cableentry point. Secondly, use your system's power supply(which supplies the voltage and current required foryour system). Make sure sufficient air can flow aroundthe radio and power supply to allow adequate cooling.SERVICEThis radio is designed for easy servicing. Refer tothe schematic diagrams, printed circuit board views,and alignment procedures contained in this manual.NoteWhen you modify your radio as described in systemset-up, take the following precaution.The rating of pin 7 (58) of the accessory connectorcable (KCT-19) on the rear of the radio is l3.6V (lA).Insert a 1A fuse if you use the 58 pin for externalequipment.If you do not intend to use the 3.5-mm jack for theexternal speaker, fit the supplied speaker-jack cap(809-0235-XX) to stop dust and sand getting in.SYSTEM SET-UPTK-760/762(Merchandise received) Display: LCDFrequency range (MHz) RF power Type148-174 25W K-.j 32ch models I136-156 25W K2TK-760/H I148-174 45W HK( License and frequency allocated by FCC)136-156 45W HK2Display: LEDFrequency range (MHz) RF power Type148-174 25W KI 2ch models I(Choose the type of transceiver'136-156 25W K2./ITK-762/HI148-174 45W HK136-156 45W HK2(Are you using the signaling?“ YESISee page 11./IDTMF decoderInstallation the control unitwhen used IC: LC73881M (SANYO).NOI(Dealeroption)ITransceiver programmingISee page 6.(Option)A personal computer (IBM PC or compatible), programming interface (KPG-4),and programming software (KPG-29DI are required for programming.(The frequency and signaling (option) data are programmed for the transceiver.)(Are you using the public address?' YESJ KAP-lSee page 10./IPA/HA unitInstallation the TX-RX unitwhen used KAP-l.NOI(Option)See page 12.(Are you using the external speaker?“ YESI KES-3./IExternal speakerNOI(Option)See page 7. See page 9.KCT-19 I KCT-18 I( . h' . bl 7 “ YESI Ignition sense cableAre you uSing t e Ignition sense ca e . ./ Accessory connector cableNO(Option) (Option)(Delivery5TK-760/762OPERATING FEATURES1. Transceiver Programming1-1. IntroductionThe TK-760/762 transceiver is programmed using anIBM PC or compatible machine, a programming inter face (KPG-4), and a programming disk (KPG-29D). Fig ure 1 shows the setup for an IBM PC.6Programming disk (KPG-29Dl1-2. KPG-4 Description(Optional PC programming interface cable)The KPG-4 is reeded to connect the TK-760/762 tothe computer. It has a circuit in the D-subconnector(25-pin) case that converts the RS-232C logic level toTTL level. The KPG-4 plug is connected to externalsocket of the TK-760/762 and to the computer by aconversion cable (option) with a 9-pin female connec tor and a 25-pin male connector.1-3. Programming Software DescriptionKPG-29D is the programming software for the TK 760/762, supplied on a 3.5“ or 5.25“ floppy disk. Thissoftware runs under MS-DOS (version 3.3 or later) onan IBM-PC/XT, AT, or PS2, or on a compatible machine.Data can be input to or read from the TK-760/762, andedited on the screen. Programmed data can beprinted.Fig. 1Communication port (RS-232Cl1-4. Data Program ModeIn this mode, data is written into the flash memoryin the transceiver. When the power is turned on, dataprogram mode can be entered immediately. When theKPG-4 is connected and commands can be received,“PROGRAM“ is displayed to indicate that data programmode has been entered.Tuning can be done using an IBM PC and KPG-29D,in the same way as in panel tuning mode. You cancarry out panel tuning by selecting test mode on theKPG-29D menu screen and following the instructionson the screen. See the KPG-29D instruction manualfor details.TK-760/762OPERATING FEATURES /INSTALLATION1-5. Clone Mode (Figure 21Programmed data is transferred from one trans ceiver to another by using a microphone cable.1. Connect the master set to the slave set with but themaster set is TK-760 only.2. Turn the slave set on.3. Hold down the CH Tj key, turn the master set on,and keep the CH Tj key down for two more sec onds. “-C-“ appears on the display to indicate thatclone mode has been entered.INSTALLATION1. Accessory Connection Cable(KCT-19 : Option)The KCT-19 is an accessory connection cable forconnecting external equipment. The connector has 15pins and the necessary signal lines are selected foruse.1-1. Installing the KCT-19 in the transceiver1. Remove the upper and lower halves of the trans ceiver case, and lift the DC cord bushing (0) fromthe chassis.2. Remove the pad (f) I.Fig. 24. Press the MON key on the master set. Themarkappears and data is sent from the master set to theslave set. “-PC-“ appears on the slave set to showthat it is receiving data.5. When cloning is complete, themark on the mas ter set disappears and “-C-“ changes to “END“. Theslave set is automatically reset and enters usermode.If cloning fails, the master set shows “ErrOr“. Re peat steps 4 and 5.If you wish to clone several sets, switch each ofthem on and repeat 4 and 5.Fig. 17TK-760/762INSTALLATION3. Insert the KCT-19 cable (e) into the chassis (0).The wire harness band (0) must be inside thechassis.4. Relocate the DC cord bushing in the chassis ( 0).5. Connect the KCT-19 to the TX-RX unit (A/2) asshown in Figure 2 ( 0).6. Connect the KCT-19 to the external accessory by in serting the crimp terminal ( 9) into the square plug(0), both of which are supplied with the KCT-19.Fig. 21-2. Terminal functionNo. (A) No. (B,C.D) Name Function KAP-1 InstllatedA-1 0-2 HK/CHS MIC hook input/Channel select<-A-2 0-5 ME MIC GND <-A-3 0-3 IGN Ignition input<-A-4 0-1 DEO Detect output <-A-5 0-6 MI MIC input<-A-6 B-2 E GND<-A-7 B-3 SB DC supply (1A) <-A-S 0-7 PH PH input<-A-9 0-4 01 Data mod input<-A-10 B-1 HOR Horn Alert output HR1A-l1 D-S SO Squelch output <-A-12 C-1 SP Audio output PNHR2A-13 E-1 AM Audio mute input<-A-14 E-2 MM MIC mute input <-A-15 E-3 TXS Signal indicating whether the transceiver is transmitting or not. <-. Refer to Terminal function on page 49, if need description in detail . Connect CN5 of the radio to connector C of the KCT-19 instead of to the internal speaker connector, if use externalspeaker.8TK-760/762INSTALLATION2. Ignition Sense Cable (KCT-18 : Option)The KCT-18 is an optional cable for enabling the igni tion function. The ignition function lets you turn thepower to the transceiver on and off with the car ignitionkey.If you use the Horn Alert function, you can turn thefunction off while driving with the ignition key.2-1. Connecting the KCT-18 to the transceiver1. Install the KCT-19 in the transceiver. (See the KCT 19 section.)2. Insert the KCT-18 lead terminal (f) into pin 3 of thesquare plug ( 0) supplied with the KCT-19, then in sert the square plug into the KCT-19 connector(0)·2-2. Modifying the transceiverModify the transceiver as follows to turn the poweror the Horn Alert function on and off with the ignitionkey.1. Remove the lower half of the transceiver case.2. Set jumper resistors (On) R5 and R6 of the TX-RXunit (A/2) as shown in Table 1.Fig. 3bKCT-18ANT) ) ) ) )i;=Db“7 .U0 0 UtTX-RX UNITA/2'-R500E;tM FuBR6KCT-19t®1 (011 10jFig. 4Operation when KCT-18 is connected R5 R6Enable EnablePower on/off and Horn Alert on/off Disable EnableHorn Alert on/off Enable DisableDisable DisableKCT-18 cannot be connectedPower cannot be turned onTable 1 R5 and R6 setup chartThe Horn Alert function can be turned on and off only if the function has beenassigned to the AUX key.9TK-760/762INSTALLATION3. PA/HA Unit (KAP-1 : Option)3-1. Installing the KAP-1 in the transceiverThe Horn Alert (max. 2A drive) and Public Addressfunctions are enabled by inserting the KAP-l Wl (3P;white/black/red) into CN4 on the TX/RX unit, insertingW2 (3P: green) into CN201 on the TX-RX unit, and con necting the KCT-19 (option) to CN2 and CN3 of theKAP-l. Installation procedure1. Open the upper case of the transceiver.2. Insert the two cables (0) with connectors from theKAP-l switch unit into the connectors on the trans ceiver.3. Secure the switch unit board on the chassis withtwo screws (0) with the notch (f) in the boardplaced at the front left side.3-2. Modifying the transceiver Horn AlertThe signal from pin 62 of IC409 (CPU) on the TX-RXunit turns 013 and 014 on and off and drives KAP-l HArelay K2 to drive the horn with a maximum of 2A.The default output is HR1. The relay open outputcan be obtained between HRl and HR2 by removingRl in the KAP-l.Rl Output formHRl (Default) EnablerHR1HR2 DisablerHR1HR2Fig. 5D0DDQIZJDDDIZJD0Fig. 6 KAP-1 foil side view Public AddressThe signal from pin 14 of IC10 of the TX-RX unitdrives PA relay Kl in the KAP-l and switches the audiopower amplif