Kenwood_TK-880_serv.pdf

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1、 2002-2 PRINTED IN JAPAN B51-8524-20 (N) 387 UHF FM TRANSCEIVER TK-880 SERVICE MANUAL GENERAL . 2 OPERATING FEATURES . 3 REALIGNMENT. 16 INSTALLATION. 19 CIRCUIT DESCRIPTION. 26 SEMICONDUCTOR DATA. 31 DESCRIPTION OF COMPONENTS . 33 PARTS LIST. 35 EXPLODED VIEW . 45 PACKING . 46 ADJUSTMENT . 47 PC BO

2、ARD VIEWS PLL/VCO (X58-4722-XX) . 56 SUB UNIT (X58-4850-10). 56 TX-RX UNIT (X57-6152-XX) (A/2) : E,E4. 57 TX-RX UNIT (X57-6152-XX) (B/2) : E,E4 . 63 TX-RX UNIT (X57-6372-70) (A/2) : E3 . 67 TX-RX UNIT (X57-6372-70) (B/2) : E3 . 73 SCHEMATIC DIAGRAM (E,E4) . 77 SCHEMATIC DIAGRAM (E3). 85 BLOCK DIAGRA

3、M. 93 LEVEL DIAGRAM. 96 TERMINAL FUNCTION . 98 SPECIFICATIONS. 99 CONTENTS Cabinet (Upper) (A01-2165-23) Panel assy (A62-0642-03) Key top (K29-9105-02) REVISED EE3E4 versions This Service Manual was revised based on the service manual as per parts No. B51-8524-10, in order to include new variants wi

4、th the following destination codes : E4. 2 TK-880 GENERAL INTRODUCTION SCOPE OF THIS MANUAL This manual is intended 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

5、 current as of the publica- tion data. Changes which may occur after publication are covered by either Service Bulletins or Manual Revisions. These are issued as required. ORDERING REPLACEMENT PARTS When ordering replacement parts or equipment informa- tion, the full part identification number shoul

6、d be included. This applies to all parts : components, kits, or chassis. If the part number is not known, include the chassis or kit number of which it is a part, and a sufficient description of the re- quired component for proper identification. PERSONNEL SAFETY The following precautions are recomm

7、ended for person- nel safety : DO NOT transmit if someone is within two feet (0.6 meter) of the antenna. DO NOT transmit until all RF connectors are verified se- cure and any open connectors are properly terminated. SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an ex

8、plosive atmosphere. All equipment should be properly grounded before power-up for safe operation. This equipment should be serviced by a qualified techni- cian only. PRE-INSTALLATION CONSIDERNATIONS 1. UNPACKING Unpack the radio from its shipping container and check for accessory items. If any item

9、is missing, please contact KENWOOD immediately. 2. PRE-INSTALLATION CHECKOUT 2-1. Introduction Each radio is adjusted and tested before shipment. How- ever, it is recommended that receiver and transmitter op- eration be checked for proper operation before installation. 2-2. Testing The radio should

10、be tested complete with all cabling and accessories as they will be connected in the final installa- tion. Transmitter frequency, deviation, and power output should be checked, as should receiver sensitivity, squelch operation, and audio output. QT equipment operation should be verified. 3. PLANNING

11、 THE INSTALLATION 3-1. General Inspect the vehicle and determine how and where the radio antenna and accessories will be mounted. Plan cable runs for protection against pinching or crush- ing wiring, and radio installation to prevent overheating. 3-2. Antenna The favored location for an antenna is i

12、n the center of a large, flat conductive area, usually at the roof center. The trunk lid is preferred, bond the trunk lid and vehicle chassis using ground straps to ensure the lid is at chassis ground. 3-3. Radio The universal mount bracket allows the radio to be mounted in a variety of ways. Be sur

13、e the mounting surface is adequate to support the radios weight. Allow sufficient space around the radio for air cooling. Position the radio close enough to the vehicle operator to permit easy access to the controls when driving. 3-4. DC Power and wiring 1. This radio may be installed in negative gr

14、ound electrical systems only. Reverse polarity will cause the cable fuse to blow. Check the vehicle ground polarity before installa- tion to prevent wasted time and effort. 2. Connect the positive power lead directly to the vehicle battery positive terminal. Connecting the Positive lead to any other

15、 positive voltage source in the vehicle is not rec- ommended. CAUTION If DC power is to be controlled by the vehicle ignition switch, a switching relay should be used to switch the posi- tive power lead. The vehicle ignition switch then controls DC to the relay coil. 3. Connect the ground lead direc

16、tly to the battery negative terminal. 4. The cable provided with the radio is sufficient to handle the maximum radio current demand. If the cable must be extended, be sure the additional wire is sufficient for the current to be carried and length of the added lead. 3 TK-880 4. INSTALLATION PLANNING

17、CONTROL STATIONS 4-1. Antenna system Control station. The antenna system selection depends on 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. 4-2. Radio location Select a convenient location

18、for your control station radio which is as close as practical to the antenna cable entry point. Secondly, use your systems power supply (which supplies the voltage and current required for your system). Make sure sufficient air can flow around the radio and power supply to allow adequate cooling. SE

19、RVICE This radio is designed for easy servicing. Refer to the schematic diagrams, printed circuit board views, and align- ment procedures contained in this manual. Note When you modify your radio as described in system set- up, take the following precaution. The rating of pin 7 (SB) of the accessory

20、 connector cable (KCT-19) on the rear of the radio is 13.2V (0.75A). Insert a 1A fuse if you use the SB pin for external equipment. Accessory connector cable (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

21、and sand getting in. GENERAL / OPERATING FEATURES 1 3 + 7 6 13 15 Speaker-jack cap (B09-0235-05) 1.Operation Features The TK-880 is a UHF FM radio designed in both 5-tone model and DTMF/2-tone/DMS model. The programmable features are summarized. This transceiver can handle up to 250 groups with 250

22、channels in each group. Model5-toneBasic DTMF/2-tone/DMSFull Full (Special setting) 1-1. 5-tone Model In this model, you can program Basic or Full level fea- tures. When you select Basic level, only 1 frame 5-tone can be programmed, and various functions are limited. When you select “Special setting

23、” in the Full level, you can use encode/decode format. Using encode/decode for- mat, you can further program the transceiver to run the script. 1-2. DTMF/2-tone/DMS Model You can use option signalling which is DTMF or 2-tone (only for decode) or DMS (Digital Message System-FFSK signalling) for every

24、 channel. 2. Transceiver Controls and Indicators (Fig. 1) 2-1. Front Panel Controls All the keys on the front panel are momentary-type push buttons. The functions of these keys are explained below. DC Source key Transceiver DC source key. When the power is switched off, all the parameters, such as t

25、he group and channel, are stored in memory. When the power is switched on again, the transceiver returns to the previous conditions. CHANNEL UP/DOWN key CALL key (Programmable) key (Programmable) A, B, C and D key (Programmable) VOLUME UP/DOWN key (Programmable) BUSY/TX LED The BUSY indicator (Green

26、 LED) shows that the channel is in use. The TX indicator (Red LED) shows that you are transmitting. 4 TK-880 2-2. Programmable Keys The FPU (KPG-60D) enables programmable keys to se- lect the following functions. Auto Dial To transmit the stored DTMF code automatically. When you select DTMF encode i

27、n the “Auto dial mode” menu, Auto dial, Redial, Dial ID and Store however no transceiver transmission takes place. If this key is pressed again, a confirmation tone will sound, the display will return to the normal channel or SCAN display, and the PA function will turn off. Queue Press Queue key to

28、toggle Queue mode on or off. When it is on, you will see the contents of the queue buffer. You can scroll the queue buffer using the Channel up, Channel down or 2/8 keys on the microphone. When you are in Queue mode, D or 6 key to toggle the Selcall and Status displays. When you are in Queue mode, p

29、ress the C or 4 key to toggle the Code and Selcall/Status displays. Hold down the D or 6 key to delete the top stack of the Queue buffer. Hold down the C or 4 key to cancel Queue mode and return to normal operation. Radio Password Backup is done even if the power supply is cut off. A lock is not can

30、celed unless a proper password is inputted. The character which can be inputted is to 6 digits with the num- ber of 0 to 9. A lock is canceled if it is the same as code set up at “Optional feature - Radio password”. If the entered radio password is incorrect, the “Key input error tone” sounds and th

31、e transceiver remains in “LOCK1” screen. OPERATINGFEATURES 6 TK-880 Receive Entry (5-tone) Press Receive entry key to enter the desired Selcall code you want to receive. This function can be activated only when “RX address” is set to the channel and “select- able receive digit” has been entered. Whe

32、n you enter Receive entry mode, the “RX address” number appears on the LCD. To enter Selcall number, use the keypad (keypad model) or use the Channel up, Chan- nel down keys to select a number. Then press C key to enter the selected number. The selected digit will shift left to enter the next digit.

33、 Press D key to move the cursor 1 position right. Hold down D key (6 key on a keypad) to clear the entered num- ber. Scan Press the Scan key to toggle scanning the channels on and off. When the transceiver is scanning, “Revert channel display” is temporary disabled and the SCN icon and “SCAN” appear

34、. Scan Delete/Add Press the Scan del/add key to temporarily delete or add each channel from/to the scan list. When a channel is added to the scan list, “” appears on LCD. When the transceiver exits Scan mode, the added or de- leted channels are erased from the scan list. The original scan list is re

35、stored. Scrambler Press the Scrambler key to toggle the Scrambler on or off. When it is activated, “_” (underscore) appears on LCD. If you hold down the Scrambler key for more than 2 sec- onds, the transceiver enters “Scrambler code select mode”. You can select the Scrambler code 1 to 16 using the C

36、hannel up, Channel down, or 2/8 keys on the mi- crophone. (Voice scrambler unit must be installed.) Selcall Entry Press Selcall entry key to enter the desired Selcall code you want to call. 5-tone This function can be activated only when “TX address” is set to the channel and “Selectable selcall dig

37、it” has been entered. When you enter Selcall entry mode, the “TX ad- dress” number appears on the LCD. DTMF/2-tone/DMS A transceivers unit ID is defined by a combination of 3- digit fleet and 4-digit ID numbers. To enter Selcall number, use the keypad (keypad model) or use the Channel up, Channel do

38、wn keys to select a number. Then press C key to enter the selected number. The selected digit will shift left to enter the next digit. Press D key to move the cursor 1 position right. Hold down D key (6 key on a keypad) to clear the entered num- ber. Selcall List Press Selcall list key to enter Selc

39、all list mode. 5-tone Select the check box of “Selectable selcall digit”. The number of digit you selected in “Selcall list” will be dis- played on LCD. If “Selcall list” has not been programmed, same digits of Selcall list code that you checked as “Select- able selcall” digits will appear on LCD. D

40、TMF/2-tone/DMS The ID list code of DMS will appear on LCD. To select the Selcall list, use Channel up/Channel down key or 2/8 key on the microphone keypad. Selcall + Status Entry Select the selcall number you wish to call. Press Selcall + Status entry key to enter “Selcall entry mode”. It works as “

41、Selcall entry mode” mode. If you press CALL or * key again, it works as “Status entry mode”. Selcall + Status List Select the selcall number you wish to call. Press Selcall + Status list key to enter “Selcall list select mode”. It works as Status list mode. If you press Selcall + Status list key aga

42、in, it works as “Status list select mode”. Send GPS (DTMF/2-tone/DMS) You can send the GPS location data manually. To per- form the operation, you have to install a GPS receiver with NMEA-0183 output. (GPS receiver must be installed.) Shift It allows you to enable Shift + Function key access. When S

43、hift key is pressed, SFT appears on LCD. Squelch Level Press Squelch level key to enter “Squelch level adjust- ment mode”. The squelch level can be adjusted by Chan- nel up/Channel down key or 2/8 key on the microphone keypad. Press Squelch level key again to store the ad- justed squelch level. Sque

44、lch Momentary Press Squelch momentary key to force the squelch unmute. “MON” icon appears on LCD and BUSY LED (Green) lights. If released, the squelch unmutes and “MON” disappears. Also, BUSY LED (Green) goes off. Squelch Off Press Squelch off key to force the squelch unmute. “MON” icon appears on L

45、CD and BUSY LED (Green) lights. If the key is pressed again, the squelch unmutes and “MON” disappears. Also, BUSY LED (Green) goes off. OPERATINGFEATURES 7 TK-880 Status Entry (5-tone) It allows the operator to input the status and transmit it to the base station. Both TX address and “Selectable sta

46、tus digit” must be programmed to perform the operation. Press Status entry key to access Status entry mode. “TX address” of the chan- nel appears on LCD. Enter the desired code using a numeric keypad. If the transceiver does not have the numeric keypad, you can use Channel up/Channel down key to select the desired num- ber and press C key to enter. The cursor moves to next position. Status List (5-tone) Press Status list key to enter Status list mode. Select the check box of “5-tone - System parameters - Selectable status digit”. The number of digit you selected in “5-to