Kenwood-TKR-750-Service-Manual电路原理图.pdf

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1、 2001-1 PRINTED IN JAPANB51-8556-00 (N)1435VHF FM REPEATERTKR-750SERVICE MANUALKnob (VOL)(K29-5389-03)Knob (DC source)(K29-9106-04)Key top(K29-5460-02)Panel assy(A62-0934-03)Panel (Outer)(A62-0840-03)Modular jack(E08-0543-05)GENERAL . 2SYSTEM SET-UP . 2OPERATING FEATURES . 3REALIGNMENT . 11INSTALLAT

2、ION . 13MODIFICATION. 15DISASSEMBLY FOR REPAIR . 16CIRCUIT DESCRIPTION . 17SEMICONDUCTOR DATA . 23DESCRIPTION OF COMPONENTS . 25PARTS LIST . 27EXPLODED VIEW. 37PACKING . 39ADJUSTMENT . 40TERMINAL FUNCTION . 47WIRING. 51PC BOARD VIEWSRX PLL/VCO (X58-4780-10). 53TX PLL/VCO (X58-4790-10) . 54DISPLAY UN

3、IT (X54-3330-20) . 55FINAL UNIT (X45-3620-XX) . 59TX-RX UNIT (X57-6260-XX) (A/2). 65TX-RX UNIT (X57-6260-XX) (B/2) . 71SCHEMATIC DIAGRAM. 77BLOCK DIAGRAM . 89KES-4 (EXTERNAL SPEAKER) . 92SPECIFICATIONS . 93CONTENTS2TKR-750GENERAL / SYSTEM SET-UPINTRODUCTIONSCOPE OF THIS MANUALThis manual is intended

4、 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 Bulletins

5、 or Manual Revisions.These 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, or chassis. If thepart number is not known, include the chassis

6、or kit numberof which it is a part, and a sufficient description of the re-quired component for proper identification.PERSONNEL SAFETYThe following precautions are recommended for person-nel safety : DO NOT transmit until all RF connectors are verified se-cure and any open connectors are properly te

7、rminated. SHUT OFF and DO NOT operate this equipment nearelectrical blasting caps or in an explosive atmosphere. This equipment should be serviced by a qualified techni-cian only.SERVICEThis radio is designed for easy servicing. Refer to theschematic diagrams, printed circuit board views, and align-

8、ment procedures contained in this manual.MerchandisereceivedChoose the typeof transceiverInstallation in theoptional spaceFrequency range (MHz)TX/RX 146174TX/RX 136150RF power50W50WTypeK,EK2See page 11.A personal computer (IBM PC or compatible), programming interface (KPG-46),and programming softwar

9、e (KPG-66D) are required for programming.YESNODC powersupply or duplexer?KES-4 installationYESNOExternal speaker?Repeaterprogramming & setupDeliverySYSTEM SET-UP3TKR-750OPERATING FEATURES1. Controls and Functions1-1. Front Panel1 Speaker2 CH/STATUS DisplayTwo, 7-segment digits display the channel nu

10、mber or sta-tus.3 VOLUME controlRotate to adjust the volume.4 DC source switch5 Dc source indicatorLights green when DC source is applied from the DC13.6V jack (DC 13.2V jack on E type versions). Lights redwhen DC source is applied from the BACK UP batteryterminal.6 MIC jackConnect a microphone to t

11、his 8-pin modular jack.19 8 7 63 4 521 TX OUT jackConnect a TX antenna or a duplexer to this receptacle.2 CONTROL I/O jackConnect an external programming device or repeatercontroller to this DB-25 interface.3 FUSEInsert 15 A blade fuses into these fuse holders.4 RX IN jackConnect a RX antenna or a d

12、uplexer to this BNC recep-tacle.7 Programmable Function keysPress these keys to activate their programmable func-tions.PF1 key (left side) Default : None (No function)PF2 key Default : Repeat disable/enablePF3 key Default : TX disable/enablePF4 key Default : Take overPF5 key Default : Monitor on/off

13、PF6 key (right side) Default : Channel up8 BUSY indicatorLights green while a signal is being received.9 TX indicatorLights red while transmitting.17 6 52 8 3 4 91-2. Rear Panel5 DC 13.6V (K type) / DC 13.2V (E type) jackConnect a 13.6 V (K type) or 13.2 V (E type) DC powersupply to this jack.6 BACK

14、UP battery terminal7 TEST/SPKR jackTest input/output jack. Connect an external speaker tothis jack.8 Cooling fan9 Optional spaceFor external DC power supply, or duplexer, etc.4TKR-750OPERATING FEATURES2. Two 7-segment LED displays Channel display (116) : While operating normally in usermode. When th

15、e displayed channel is contained in scan se-quence, the right side decimal point is displayed. When the displayed channel is the priority channel, theleft side decimal point is displayed. “PC” is displayed while in PC mode. “PG” is displayed while in firmware programming mode.2 decimal points displa

16、yed = 115,200bps1 decimal point displayed = 57,600bpsNo decimal = 38,400bps “E1” is displayed when FPU data is not written. “E2” is displayed when the channel data is not written. “E3” is displayed when PLL is unlocked.Receiver PLL unlocked = flashing BUSY LED.Transmitter PLL unlocked = flashing TX

17、LED. “E4” is displayed when PTT is attempted on a channelnumber that has no frequency data programmed. “SC” is displayed while in scan mode.5TKR-750OPERATING FEATURES3. Programmable FunctionsTKR-750 contains many Programmable Functions tabled below.Programmable Function DescriptionAUX Out 15 Off AUX

18、 Out 1 to 5 ports become deactivated, respectively.AUX I/O 16 Off AUX I/O 1 to 6 ports become deactivated, respectively.AUX Out 15 On AUX Out 1 to 5 ports become activated, respectively.AUX I/O 16 On AUX I/O 1 to 6 ports become activated, respectively.AUX Out 15 On/Off AUX Out 1 to 5 ports are toggl

19、ed between its active and inactive states, respectively.AUX I/O 16 On/Off AUX I/O 1 to 6 ports are toggled between its active and inactive states, respectively.Channel 116 Directly select Channel 1 to 16, respectively.Channel Down The channel decrements by one.Channel Up The channel increments by on

20、e.CW ID On The CW ID is transmitted.CW Message 18 On The CW Message 1 to 8 is transmitted, respectively.Display Off All panel LEDs are turned off except the Power LED.Display On All panel LEDs become active as normal status indicators on the repeater.Display On/Off All panel LEDs, with the exception

21、 of the Power LED, are toggled between off and their normal status onthe repeater.Hold Time Enable The Parameter of Repeat Hold Time is enabled.Hold Time Disable The Parameter of Repeat Hold Time is disabled.Hold Time Disable/Enable The Parameter of Repeat Hold Time is toggled between disabled and e

22、nabled.Local Tx Disable The local mics PTT is disabled.Local Tx Enable The local mics PTT is enabled.Local Tx Disable/Enable The local mics PTT is toggled between disabled and enabled.Monitor Off The QT/DQT decoder is disabled.Monitor On The QT/DQT decoder is enabled.Monitor On/Off The QT/DQT decode

23、r is toggled between disabled and enabled.Monitor Momentary The QT/DQT decoder is momentarily disabled.Multi Table Sub Multi Table No. Select Signalling changes to the Multi Table Sub.Multi Table Main Multi Table No. Select Signalling changes to the Multi Table Main.Multi Table Main/Sub Multi Table

24、No. Select Signalling changes between Multi Table Sub and Multi Table Main.QT/DQT Dec Disable Disables the QT/DQT decode operation.QT/DQT Dec Enable Enables the QT/DQT decode operation.QT/DQT Dec Disable/Enable Toggles between disabling and enabling the QT/DQT decode operation.QT/DQT Enc Disable Dis

25、ables the QT/DQT encode operation.QT/DQT Enc Enable Enables the QT/DQT encode operation.QT/DQT Enc Disable/Enable Toggles between disabling and enabling the QT/DQT encode operation.Repeat Disable Disables repeater operation.Repeat Enable Enables repeater operation.Repeat Disable/Enable Toggles betwe

26、en disabling and enabling repeater operation.Reset Resets to default condition set up by FPU.DC Power Save Off Activates DC Power Save Mode Off.DC Power Save On Activates DC Power Save Mode On.DC Power Save On/Off Toggles between DC Power Save Mode On and Off.6TKR-750Programmable Function Descriptio

27、nScan Off Inhibits scanning.Scan On Starts scanning.Scan On/Off Scanning is toggled between being enabled or inhibited.Scrambler Off Disables an installed optional voice scrambler board.Scrambler On Enables an installed optional voice scrambler board.Scrambler On/Off Toggles between enabling and dis

28、abling an installed optional voice scrambler board.Squelch Off The Squelch unmutes.Squelch On The Squelch mutes.Squelch On/Off The receivers squelch toggles between muted and unmuted.Squelch Momentary The Squelch momentarily unmutes.Take Over On/Off Toggles between disabling and enabling remote wire

29、line control.Test Tone Off The Test Tone is inhibited.Test Tone On The Test Tone is enabled.Test Tone On/Off Toggles between enabling and inhibiting the Test Tone.TOT Disable The Time Out Timer is disabled.TOT Enable The Time Out Timer is enabled.TOT Disable/Enable The Time Out Timer is toggled betw

30、een disabled and enabled.TX Disable The transmitter is inhibited.TX Enable The transmitter is enabled (normal).TX Disable/Enable Toggles between transmitter inhibited and transmitter enabled (normal).The following Programmable Functions are output functions used to tell the condition of the TKR-750

31、to an external device.The output functions can be assigned to only AUX Outputs as follows.Programmable Function DescriptionCOR (Carrier Operate Relay) This function becomes valid if an RF carrier is present.TOR (Tone Operate Relay) This function becomes valid if an RF carrier and the specified QT/DQ

32、T are present.RX Unlock This alarm function becomes valid if the RX PLL circuitry becomes unlocked.TX Unlock This alarm function becomes valid if the TX PLL circuitry become unlocked.Power Supply Lower Limit This alarm function becomes valid if the DC power supply voltage becomes less than the prese

33、t point.The preset point is selected in the range of 10.6V to 13.6V.TXS (TX Sense) This function becomes valid when the transmitter is keyed.Selectable AUX Outputs which are set up as Selectable appear in the available Function List for the AUX InputFunctions and Key Assignment.This allows AUX Input

34、s and PF Keys to be used to control AUX Outputs.RX Signal Detect This function becomes valid if the RX signal level becomes less than the preset point. The preset point isselected in the range of 120dBm to 95dBm.RF Power Down Detect This alarm function becomes valid if the RF Power becomes less than

35、 about 10W.Fan Status This alarm function becomes valid when the Fan is turned on, either by sensing a high temperaturecondition or by its operating mode being set to Continuous.OPERATING FEATURES7TKR-750OPERATING FEATURES4. Trigger AssignmentThe Programmable Functions described above can be assigne

36、d to PF keys, AUX input, Save on/off, Start up, and Power supplyaccording to following table.In the last column of the table, when the Programmable Functions is assigned to any PF keys, it expresses that the LED in thePF key turns on either conditions. “Yes” expresses that the trigger is available t

37、he Programmable Function. “No” expressesthat the trigger is not availabale the Programmable Function.Trigger PF keys AUX Save Start up Power Condition of LED in he PF key onFunction input on/off supplyAUX Out 15 (I/O 16) Off No Yes Yes Yes Yes AUX Out 15 (I/O 16) On No Yes Yes Yes Yes AUX Out 15 (I/

38、O 16) On/Off Yes Yes No No No Turns on in ON status.Channel 116, Up/Down Yes Yes Yes Yes Yes Do not turn on.CW ID On Yes Yes Yes Yes Yes Turns on while transmitting.CW Message 18 On Yes Yes Yes Yes Yes Turns on while transmitting.Display Off No Yes Yes Yes Yes Display On No Yes Yes Yes Yes Display O

39、n/Off Yes Yes No No No Turns on in ON status.Hold Time Enable No Yes Yes Yes Yes Hold Time Disable No Yes Yes Yes Yes Hold Time Disable/Enable Yes Yes No No No Turns on in Disable status.Local Tx Disable No Yes Yes Yes Yes Local Tx Enable No Yes Yes Yes Yes Local Tx Disable/Enable Yes Yes No No No T

40、urns on in Disable status.Monitor Off No Yes Yes Yes Yes Monitor On No Yes Yes Yes Yes Monitor On/Off Yes Yes No No No Turns on in ON status.Monitor Momentary Yes No No No No Turns on in ON status.Multi Table Sub No Yes Yes Yes Yes Multi Table Main No Yes Yes Yes Yes Multi Table Main/Sub Yes Yes No

41、No No Turns on in Sub status.QT/DQT Dec Disable No Yes Yes Yes Yes QT/DQT Dec Enable No Yes Yes Yes Yes QT/DQT Dec Disable/Enable Yes Yes No No No Turns on in Disable status.QT/DQT Enc Disable No Yes Yes Yes Yes QT/DQT Enc Enable No Yes Yes Yes Yes QT/DQT Enc Disable/Enable Yes Yes No No No Turns on

42、 in Disable status.Repeat Disable No Yes Yes Yes Yes Repeat Enable No Yes Yes Yes Yes Repeat Disable/Enable Yes Yes No No No Turns on in Disable status.Reset Yes Yes No No No Do not turn on.DC Power Save Off No Yes No Yes Yes DC Power Save On No Yes No Yes Yes DC Power Save On/Off Yes Yes No No No D

43、o not turn on.Scan Off No Yes Yes Yes Yes 8TKR-750Trigger PF keys AUX Save Start up Power Condition of LED in he PF key onFunction input on/off supplyScan On No Yes Yes Yes Yes Scan On/Off Yes Yes No No No Turns on in ON status.Scrambler Off No Yes Yes Yes Yes Scrambler On No Yes Yes Yes Yes Scrambl

44、er On/Off Yes Yes No No No Turns on in ON status.Squelch Off No Yes Yes Yes Yes Squelch On No Yes Yes Yes Yes Squelch On/Off Yes Yes No No No Turns on in OFF status.Squelch Momentary Yes No No No No Turns on in OFF status.Take Over On/Off Yes No No No No Turns on in ON status.Test Tone Off No Yes Ye

45、s Yes Yes Test Tone On No Yes Yes Yes Yes Test Tone On/Off Yes Yes No No No Turns on in ON status.TOT Disable No Yes Yes Yes Yes TOT Enable No Yes Yes Yes Yes TOT Disable/Enable Yes Yes No No No Turns on in Disable status.TX Disable No Yes Yes Yes Yes TX Enable No Yes Yes Yes Yes TX Disable/Enable Y

46、es Yes No No No Turns on in Disable status.None Yes Yes Yes Yes Yes Do not turn on.OPERATING FEATURES5. Simplex/Duplex OperationThe Simplex/Duplex function is used to specify whetherthe channel is used as simplex (receiver muted during trans-mit) or duplex (receiver unmuted during transmit). If thec

47、hannel has same TX/RX frequency, it can operate only inSimplex mode.6. Repeater/Base Station OperationThe Repeat function is used to specify whether the chan-nel is used as a repeater or as a base station. A repeatersimultaneously and automatically re-transmits its receivedaudio, a duplex base station has independent simultaneoustransmit and receive paths, a simplex base station are