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TK-480/481 REVISION II

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1. E Eet CSR all CN4 ETT ET e S lure 5 Ju gt Hee Cp e I o Hes S aru S mer 78 L t al Raz R114 jia dae v f fere beem pen back A 1 Q lt R166 ha Sea m cs KORS 8 lol T 68 Danni ig q 2 dies Hoss CL Aa E Er af n viene de E NC een Ee Sie Er dua ba BIS Al uf Een ali P d E Ss C51 lolz O 8 H 8 C ZE N y e mir ti gt ae d a KI A giel AN B gt 10 Address Ref No Address Ref No A Component side Cea Pattern 1 M 62364FP TA75WO2FU TDA7053AT Q10 7M D2 Pattern 2 TC75W51FU ES Pattern 3 n 012 sv Da pattern 4 Q13 Ge 014 6P D6 015 geng 12 Q16 8F D8 p Connect 1 and 6 017 7N DO RN5VL42C TA31136FN LC73872M TA75S01F Q18 60 pio i Q19 5 Q20 70 D12 Q21 D17 I uu 022 os a 51 TK 480 481 1K 480 481 BLOCK DIAGRAM DISPLAY UNIT KEY SECTION LCD ASSY X54 321 B 2 E Zi Z O i A mS SP o e uu 009 s 309 DISPLAY UNIT DISPLAY SECTION a Cc 2560461765 CAGADA O O O X54 321 4 2 PROTECT CORE DECADE COUNTER SSW a D2 X4 E PROM Q304 25C4617 8 KI1 Bien A As MA2S111 Q305 2SBT98 DL DK K12 Q M PROTECT SDA D303 O15AZ2 4 X 5M
2. appears at the extreme right of the LCD and AUX port which is inside of the transceiver turns to the active level If pressed again the underscore disappears and the AUX ports turns to the deactive level B DTMF ID BOT Pressing this key in Conventional mode automatically sends the preset Connect ID B DTMF ID EOT Pressing this key in Conventional mode automatically sends the preset Disconnect ID B Display character This key switches the LCD display between the system group number and system group name E Emergency Pressing this key for longer than the programmed Emer gency Key Delay Time causes the transceiver to enter the emergency mode The transceiver jumps to the pro grammed Emergency System Group and transmits for the programmed Active Time The transceiver disables mic mute while transmitting After finishing transmission the transceiver receivers for the programmed Interval Time The transceiver mutes the speaker while receiving Following the above sequence the transceiver continues to transmit and receive If Man Down Switch has been programmed on the ra dio and the switch is activated the radio enters Emergency mode after the specified Man Down Delay Time expires B Function Pressing this key causes the transceiver to display FCN Then pressing a DTMF key causes the correspond ing programmed function to start This key may be conve nient when using many functions with the 12
3. 60 KNB 16A 17A Ni Cd BATTERY 61 KPG 36 PROGRAMMING INTERFACE CABLE 61 KSC 19 CHARGER 61 SPECIFICATIONS e 62 CAUTION When using an external power connector please use with maximum final module pro tection of 9V TK 480 481 GENERAL SYSTEM SET UP 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 current as of this publica tion date Changes which may occur after publication are covered by either Service Bulletins or Manual Revisions which are issued as required ORDERING REPLACEMENT PARTS When ordering replacement parts or equipment informa tion the full part identification number should be included This applies to all parts components kits and 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 required component for proper identification PERSONNEL SAFETY The following precautions are recommended for person nel safety e DO NOT transmit until all RF connectors are secure and any open connectors are properly terminated Na TX RX unit Display unit ZE X57 5630 XX X54 3210 XX Frequency range destination ee E
4. 7 3 DBD On Tone When a D B D code is received transpond tone sounds 7 4 DBD Off Tone When a D B D release code is received transpond tone sounds 7 5 Password Agreement Tone When the correct password is entered the tone sounds The optional feature s control tone can be set to yes or no 7 6 PTT Release Tone When you release the PTT switch the PTT release tone sounds 7 7 Busy Tone Sounds in LTR mode when you cannot use a repeater system busy or TX inhibit Sounds in conventional mode when busy channel lockout is functioning You can select yes or no for the optional feature s warning tone 7 8 Group Call Tone Sounds when a group call with the correct DTMF option signalling is received repeats 7 times You can select yes or no for the optional feature s warning tone 7 9 Individual Call Tone Sounds when an individual call with the correct DTMF option signalling is received You can select yes or no for the optional feature s warning tone 7 10 Key Press Tone A Sounds when a key is pressed For toggle keys sounds when toggle function is turned on key press tone B sounds when it is turned off You can select yes or no for the optional feature s control tone 7 11 Key Press Tone B Sounds when a key is pressed For toggle keys sounds when the toggle function is turned off key press tone A sounds when it is turned on You can select yes or no for the optional feature s control tone 7
5. D315 IMNIO O y J TM _ _ zOQ gt lt X lt MSW D317 MA2sS111 PROTECT IC16 D318 JMN10 ans OLOSI AVR CS sp g 6 AVR iGkey S 81350HG KD js T 50BM AUX SW Kok K112 pa AM OO O IC15 LSDOUT E 0303 i 30622M8A 4F9GP HSDOUT B z 2SCA617 S P MICROPROCESSOR SFTOE z x BUSY LCDCS O PLLCLK O LG BEEP u gods PEA AFREG1 E NE D321 2SC4617 S AFREG2 IC8 1 2 E O15A76 8 LG LRKBLC MUTE EEPDAT TC75W51FU pi fx SM DACSTB gt TXD AFCLR m BRC SAVE gt RXD OUTPUT IC6 5 5TC AUXTXD re NJUT201USO NC DTMPD AFMSKE 25J243 IC18 BU4094BCFV TXD 5R DC SW AVR 1017 m AFDAT MINDAT AT29C020 90TI LOK OUTPUT UE E EXPANDER SRC q OO AN E A BULOGABCTV cee NUN Q2 gt u E en AFOUD 28A1832 GR OPT SQ SB TX RX UNIT CODE1 CODE2 ST X57 563 EN3 VOL Q21 PLLUL EN1 BATT 2SK 1824 RXD KEY2 ANLSOL STC Ges AF ee PTT KEY1 TEMP BAL TATSWOLFU MUTE I DTMDAT RSSI BUFF PF LSDIN 014 T Ger 8757 i K 480 M68757L os MD TK 480 KCH31 Q17 D4 D5 Q12 TK 481 M68757H _D7 HVU131 TXAI MUTE 28C4617 8 TK 481 KCH32 2SC5108 Y MA2SOTTX2 2SC4988 D9 10 MA2SOTTX2 L30 RXAI gt BUFF BUFF T R RF DRIVE RF POWER ANT SB a Ted Ed AMP SW AMP AMP AMP SW a EMG GIS pe f Q11 lt PTT 25C5108 Y 2SC5108 Y gt ENZ BUFF f m RXAO LOOP AMP ce SC Q13 ST Q4 d TXA0 FILTER Decodari 2SK 1824 2 C4617 S D2 5TC ae B e E DEO A PLL O DI ANI VEO sQ TAT5SSO1F DC CURR ST LOK ma SW DET RXD LPF HSDOUT
6. IC12 xour OSC1 PD Fig 13 Decode 8 Power Supply Circuit Battery B is supplied via a 3A fuse from the battery ter minal connected to the TX RX unit After passing through the power switch power supply SB is applied to the three AVRs IC5 supplies 5V 5M to the control circuit and IC7 supplies 5V BC to common circuits IC6 supplies to the TX circuit and the RX circuit During transmission BIC be comes Low and Q2 is turned ON to supply 5V BT to the TX circuit During reception BRC becomes Low and Q1 is turned ON to supply 5V bR to the RX circuit RF power amp 1030 Fig 14 Power supply circuit 9 Optional Board Terminal Terminals for mounting the option board are provided at the bottom edge of the TX RX unit The table below shows the correspondence between the board and terminals R422 R32 R250 R259 R147 R276 R421 may have to be removed depending on the type of option board being used Function Modulation ANI input SB GND TXD RXD SO LOK DI ANI DEO 1 2 PT TXAI MUTE TXAO Scramble Emergency low PTT switch signal input to board TX low Battery bV RXAO D D O PTTIN 5CNS Table 1 Terminal name and function RXEMAO RXEMAI PTTOUT 19 TK 480 481 20 SEMICONDUCTOR DATA Microprocessor 30622M8A 4F9GP TX RX Unit IC 15 B Pin function 39 a HSDOUT HSDIN 41 BLCK 42 s 5V EN EN EN Funetion 00 KS ES ES ES EN E
7. System No Group No Press S now in tuning mode Use 4 B button to write tuning data through tuning modes and channel selector knob to adjust tuning requirements 1 to 256 appears on LCD Use Ch button to select the adjustment item through tuning modes Use A button to adjust 3 point tuning LCD display Tuning mode F ka O uu Adjustment item Adjustment 1 256 3 point tuning frequency MHz TK 480 TK 481 Test CH 851 05000 806 05000 935 02500 896 02500 860 50000 815 50000 938 02500 899 02500 869 90000 824 90000 940 90000 901 90000 Adjustment Points TX RX unit X57 5630 XX Component side view B Tuning mode Panel test mode System Group No S S ii FREO Frequency adj C HPOW High power C S C EE C S S BAL DOT balance C S NMAX Max deviation NPSPAC TK 480 C C C C E C C S zx C S C ET te C 1K 480 481 3b 1K 480 481 ADJUSTMENT Common Section ir nm Condition Test Specifications Remarks Unit Terminal Unit 1 Setting 1 BATT terminal voltage 7 5V Standard modulation MOD 1kHz DEV 3kHz TK 480 1 5kHz TK 481 voltage DVM 2 SYS GRP 7 1 4 3V or less PIT ON 3 SYS GRP 7 1 TA mode ON PIT ON Transmitter Section ap Condition Test Unit Terminal Frequency 1 SYS GRP 4 gt f counter Panel ANT Panel En
8. R90 0718 05 R90 0743 05 R90 0743 05 R90 0741 05 R90 0743 05 R90 0743 05 RK73GB1J104J RK73GB1J473J RK73GB1J154J RK73GB1J104J RK73GB1J184J RK73GB1J104J RK73GB1J183J RK73GB1J273J RK73GB1J154J RK73GB1J103J RK73GB1J473J RK73GB1J223J RK73GB1J104J RK73GB1J683J RK73GB1J394J RK73GB1J472J RK73GB1J104J RK73GB1J473J RK73GB1J332J RK73GB1J152J RK73GB1J683J RK73GB1J154J RK73GB1J182J RK73GB1J563J RK73GB1J124J RK73GB1J274J RK73GB1J473J RK73GB1J332J RK73GB1J222J RK73GB1J220J RK73GB1J183J RK73GB1J123J RK73GB1J472J R92 1252 05 RK73GB1J123J RK73GB1J334J RK73GB1J101J RK73GB1J472J RK73GB1J104J RK73GB1J151J RK73GB1J560J RK73GB1J272J RK73GB1J471J RK73GB1J102J R92 0670 05 RN73GH1J913D RN73GH1J683D RN73GH1J913D RN73GH1J333D RK73GB1J684J RK73GB1J564J RK73GB1J331J RN73GH1J274D RK73GB1J334J TX RX UNIT X57 5630 XX ee Desti mae as reme 0 09909 MULTI COMP 4 7K X4 MULTIPLE RESISTOR MULTIPLE RESISTOR MULTIPLE RESISTOR MULTIPLE RESISTOR MULTIPLE RESISTOR CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R
9. TX RX UNIT X57 5630 XX 10 TK 480 11 TK 481 Foil side view E R53 5 bel O e IC13 X3 00 E SIS 5 S 14 O R276 R38 22 C C e EE T B D ss SER DE R421 RAD TE m bk R89 S 17 16 z EE T Els z ege E 2 52 STI nu 1 n LEUR eg e 6 107 CN 12 as ran D Sc E 2 R81 1 c ATE s tea Sir us gs HE E E E BS ma Ria mi S 3 d i me d RI E xr Wes AE masus el T ipd SESCH D12 8 Tyce cel PR B PENET 7 as 1066 o OT a Rims i 8 R166 5 Ze GK Ki 51 all IA E 130 4R901 GK m 76 50 L u Ro Sc FS ae T G m i fic ri E SE zoe Ros Les H E E zs mig IS S 2 Q E CH CH lee 2 O tes E Los E E N R205 Hike E L E NIe 3s E E QN O te td d d S 1013 R297 UI T Nb SS k S IRS RGz E 2 R298 I Tru m He made Bh Die T Get pa TREERE So Elek vi WEE in F ae PEDE cia E UM S sd gt 3 3 i O e glat 684 mi d a CE Hb ac buts NJ Cat UI O O PS is 6203 Fe ES moe PSOE X4 z ONO E Ce e Q2 018 e Pattern 1 TK11250BM 30622M8A 4F9GP AT29C020 90TI AT2408N10S12 5 TC74HC4017AF Pattern 2 E W29C020C90 os P Pattern 4 Pattern 5 Pattern 6 Foil side 1017 5Q M68757H NJ U7201U50 M68757L 1618 30 Q3 5F D8 8 3 x TK 480 481 pc TORIS w mu mE B B B B NH B S 1030 m TX RX UNIT X57 5630 XX 10 TK 480 11 TK 481 Component side view Foil side Sin RII
10. 6 8 Emergency Function Emergency status 99 will be sent at the beginning of each emergency transmission B Emergency Status response Alert can be selected for the called radio unit s re sponse to reception of status 99 which is used as an emer gency status 6 9 Other Functions B Manual Dial Fleet ID and Status numbers can be entered from DTMF keypad DIMF microphopne is required B FleetSync Baud Rate MSK data baud rate setting The same rate must be set as a communication partner 1200bps Data communication is made in 1200bps The communi cation area is much wider than 2400bps Recommended for repeater operation 2400bps Data communication is made in 2400bps The communi cation area is narrower than 1200bps but it will decrease the data traffic Data rate 2400bps may not work prop erly depending on the repeater s characteristic B Message Mode Timer Message Mode Timer is a delay timer returning from message stack mode to Normal mode B Status Short Long Message on Data Group Status Short Long Message transmission is made whether on the Data System Group B Status Short Unit ID Message Serial Output Option Whether a received Status Short message or PTT ID is output or not from serial port B Call Alert Continuous The radio can provide the alert tone repeatedly until next operation B PTT ID Sidetone This function allows a single beep sound after the PTT ID MSK for FleetSync singalling is encod
11. 0 010UF 3 3UF 15UF 22PF 220PF 0 022UF 22PF 1000PF 0 022UF 1000PF 15PF 2200PF 0 015UF 0 10UF 100PF 10PF 4 0PF 0 010UF 100PF 270PF 0 010UF 0 10UF 1200PF 4 0PF 6 8UF 0 010UF 100PF TK 480 481 PARTS LIST TX RX UNIT X57 5630 XX er Desti na Desti Bot No Ades Me ParsMo Description go Ret No e D I Pariso Gees o CK73GB1C104K 0 10UF 6137 CC73GCH1H101J CHIP C 100PF CK73GB1C333K 0 033UF C138 CK73GB1E103K CHIP C 0 010UF CK73GB1C104K 0 10UF C139 CC73GCH1H030C CHIP C 3 0PF CK73GB1H562J 5600PF 6139 CC73GCH1H020C CHIP C 2 0PF CK73GB1E103K 0 010UF C140 CK73FB1A105K CHIP C 1 0UF CC73GCH1H121J 120PF C141 CK73GB1H472K CHIP C 4700PF CK73GB1C683K 0 068UF C142 143 CC73GCH1H101J CHIP C 100PF CC73GCH1H101J 100PF C144 CK73GB1C273K CHIP C 0 027UF CK73GB1H562J 5600PF C145 146 CC73GCH1H101J CHIP C 100PF CC73GCH1H150J 15PF C147 148 CK73HB1C103K CHIP C 0 010UF CK73GB1H272J 2700PF C149 CC73GCH1H040C CHIP C 4 0PF CK73GB1C333K 0 033UF C150 151 CC73GCH1H101J CHIP C 100PF CC73GCH1H030C 3 0PF C152 CC73GCH1H020C CHIP C 2 0PF CC73GCH1H101J 100PF C153 CC73GCH1H101J CHIP C 100PF CK73GB1H272J 2700PF C154 CK73GB1C104K CHIP C 0 10UF CK73GB1E103K 0 010UF C155 CC73GCH1H101J CHIP C 100PF CK73GB1C104K 0 10UF C156 C92 0507 05 CHIP TAN 4 7UF CC73GCH1H151J 150PF C157 CC73GCH1H680J CHIP C 68PF CC73GCH1H101J 100PF C158 CC73GCH1H270J CHIP C 27 C92 0504 05 0 68UF 6159 CK73FB1H563K CHIP C 0 056UF C92 0003 05 0 47UF C160 16
12. 1 SYS GRP 4 s MIC input OFF Select FOT in tuning mode Deviation meter filter setting LPF 3kHz HPF 50Hz De emphasis 750us PTT ON 1 SYS GRP 4 Select FDOT In tuning mode Deviation meter filter setting LPF 3kHz HPF OFF PTT ON 1 SYS GRP 4 Select FLTR 3 3 3 in tuning mode Deviation meter filter setting EIS ESRA HPF OFF PTT ON 1 SYS GRP 4 Select DIMF In tuning mode Deviation meter filter setting LPF 15kHz HE 9 PTT ON 1 SYS GRP 4 Select FMSK In tuning mode Deviation meter filter setting LPF 15kHz HPF OFF PTT ON 1 SYS GRP 4 Select TONE gt In tuning mode Deviation meter filter setting LPF 15kHz HPF OFF PTT ON 1 SYS GRP 4 st Select BATT xx x in tuning mode PTT ON ADJUSTMENT Power meter Deviation meter Oscilloscope Measurement Test wen Unit Terminal Unit Parts Method Panel ANT Panel Encoder knob Specifications Remarks TK 480 0 75kHz TK 481 0 45kHz 0 05kHz TK 480 TK 481 1 00kHz 0 75kHz 0 10kHz 0 05kHz TK 480 3 00kHz TK 481 1 50kHz 0 15kHz 0 10kHz 2 bkHz 0 1kHz After pressing the BATT terminal voltage 6 2V PTT switch confirm that one predeter mined numeric in the range 1 to 256 appears and then press B key That numeric will be stored in memory 1K 480 481 ADJUSTMENT Measurement
13. ASP ZHXS L WA ZHAL Ugpzr ndu LNY A 1934Ip s Aoid edooso r2so y 199uuo5 U01 99S Jy 9u1 ui sjueujaJnseouu ayeu O wugpss wapes SUUAWEC SUMAUIJCE L SUUAWQ E SUJAUJT GC SUMAUJS8SL JV Z 90 OLIO CCLO 60 6612 EVLO 6912 lt gt lt lt but EAE dy ESTE AS 0c1 LL 081 INV IN uedo 992 SUIIAUIB9E SWIAUGLL Ugpg 0l ugpo ZLL Uugps s0rL Ugp990L UgPp 80l ugposLrr Ugpy 8Ll Ugprsli Ugposli JV ZHINS8 tt L ZHINOO 8 6 Jv SE ZHINS8 t Lal ZHN 38 dl uonoes XY 60 TK 480 481 KNB 16A 17A Ni Cd BATTERY KPG 36 PROGRAMMING INTERFACE CABLE KSC 19 CHARGER KPG 36 External View KNB 16A External View KNB 17A External View KNB 16A KNB 17A Circuit Diagram Discharge pin side Circuit Diagram Discharge pin side Breaker Breaker Breaker Breaker 70 5 C 80 5 C 70 5 C 80 5 C IS al i i Diod SE Thermister GE Thermister Charge pin side Charge pin side KNB 16A Specifications Mo AE I EA 7 2V 1 2V x 6 Charging current 1100mAh Dimensions MM 58 W x 110 8 H x 17 2 D Projections included Charger and charging time KSC 19 Normal Charger Approx 8 hours KSC 20 Rapid charger Approx 1 hour Ae asas P 180g KNB 17A Specifications VOM AGS TR 7 2V 1 2V x 6 Charging current 1500mAh Dimensions MM 58 0 W x 110 8 H x 20 0 D Projections
14. According to the larger TK 480 2 9kHz According to the larger Deviation Specifications Remarks Condition 1 SYS GRP 4 Select BAL sz in tuning mode Deviation meter filter setting LPF 3kHz APE OFF AG PTT ON AF VTVM meter Oscilloscope 1 SYS GRP 4 Select MAX s in tuning mode AG 1kHz 150mV Deviation meter filter setting LPF 15kHz HPF OFF Adjustment item L MAX sk sk OC MAX cese H MAX PTT ON 50Hz 1 SYS GRP 4 Select TMAX in tuning mode AG 1kHz 150mV Deviation meter filter setting LPE S T5kbIZ HPF OFF Adjustment item L TMAX kk 2C TMAX ese sk H TMAX Xxx PTT ON 1 SYS GRP 10 s 50Hz Select NMAX in tuning mode AG 1kHz 150mV Deviation meter filter setting LPF S 15kHz HPF OFF Adjustment item L NMAX x x 2C NMAX x H NMAX sk PTT ON 1 SYS GRP 4 1 AG 1kHz 15mV TK 480 AG 1kHz 8mV TK 481 Deviation meter filter setting LPF 15kHz FIRE ORE PTT ON TK 480 2 2 3 6kHz TK 481 0 6 1 0kHz 1 SYS GRP 4 1 TA mode ON Press A key then C key AG 1kHz 15mV TK 480 AG 1kHz 8mV TK 481 Deviation meter filter setting LPF 15kHz HPF OFF PTT ON 37 1K 480 481 15 QT DEV adjustment 16 DOT DEV adjustment 17 LTR DEV adjustment 18 DTMF DEV adjustment 19 MSK DEV adjustment 20 TONE DEV adjustment 21 BATT detection writing Condition
15. KPG 36 and programming software KPG 49D are required for programming The frequency trunked system features conventional system features TX power HI LOW and signaling data are programmed for the transceiver KMC 25 Speaker microphone Option 1K 480 481 OPERATING FEATURES 1 Operation Features The TK 480 481 is an 800 900MHz band EFJ LTR M com patible trunked radio designed to operate in both trunked and conventional modes The programmable features are summarized Model ER NN Trunking mode Conventional mode This model can handle up to 32 systems with up to 250 groups in each system The transceiver can be used in both trunked mode and conventional mode Systems groups and their functions are programmed 2 Transceiver Controls and Indicators 2 1 Physical Layout Microphone Speaker OO OOO DO D 69 GI G2 Note The transceiver is also available without the DTMF keypad 01 2 2 Panel controls The key on the top and front panel is momentary type push buttons The functions of these keys and knob are ex plained below D Antenna connector Connect the supplied antenna here 2 System or Group selector knob Programmable Turning the system or group selector knob clockwise increases the system or group number by one Turning the knob in the counterclockwise direction decreases the system or group number by one After the system number or group number reaches the high
16. blinking When data receiving to transceiver the green LED is blinking Notes e he data stored in the personal computer must match model type when it is written into the flash memory e Change the TK 480 481 to PC mode then attach the in terface cable 5 3 KPG 36 description PC programming interface cable Option The KPG 36 is required to interface the TK 480 481 to the 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 36 connects the universal connector of the TK 480 481 to the computers RS 232C serial port 5 4 Programming software description The KPG 49D programming disk is supplied in 3 1 2 disk format The software on this disk allows a user to program TK 480 481 radios via programming interface cable KPG 36 5 5 Programming with IBM PC If data is transferred to the transceiver from an IBM PC with the KPG 49D the destination data basic radio informa tion for each set can be modified Normally it is not neces sary to modify the destination data because their values are determined automatically when the frequency range fre quency type Is set The values should be modified only if necessary Data can be programmed into the flash memory in RS 232C for mat via the universal connector KPG 49D instruction manual parts No B62 1096 XX 6 Firmware Programming Mode 6 1 Preface Flash memory is mounted on the TK
17. phase comparator charge pump This PLL IC is fractional N type synthesizer and performs in the 100kHz reference signal which is eighth of the channel step 12 5kHz The input signal from the pins 1 and 5 of the PLL IC is divided down to the 100kHz and compared at phase comparator The pulsed output signal of the phase com parator is applied to the charge pump and transformed into DC signal in the loop filter LPF The DC signal is applied to the pin 3 of the VCO and locked to keep the VCO frequency constant PLL data is output from DT pin 52 CP pin 64 and EP pin 69 of the microprocessor IC15 The data are input to the PLL IC when the channel is changed or when transmis sion is changed to reception and vice versa A PLL lock con dition is always monitored by the pin 21 UL of the micro processor When the PLL is unlocked the UL goes low IC14 Q10 Q17 D5 To TA dri TA Low rive amp Fig 8 PLL block diagram 6 Control Circuit The control circuit consists of microprocessor IC15 and its peripheral circuits It controls the TX RX unit and trans fers data to and from the display unit IC15 mainly performs the following 1 Switching between transmission and reception by PTT signal input 2 Reading system group frequency and program data from the memory circuit 3 Sending frequency program data to the PLL 4 Controlling squelch on off by the DC voltage from the squelch circuit 5 Controlling the aud
18. 010UF C201 CC73GCH1H470J CHIP C 47PF CK73GB1H102K 1000PF C202 CK73GB1E103K CHIP C 0 010UF CK73GB1C104K 0 10UF C203 CC73GCH1H470J CHIP C 47PF CC73GCH1H101J 100PF C204 C92 0003 05 CHIP TAN 0 47UF CC73GCH1H100D 10PF C205 206 CK73HB1C103K CHIP C 0 010UF CC73GCH1H101J 100PF C207 CK73GB1C104K CHIP C 0 10UF CC73GCH1H010C 1 0PF C208 209 CC73GCH1H101J CHIP C 100PF CC73GCH1HR75C 0 75PF C261 262 CK73HB1C103K CHIP C 0 010UF CC73GCH1H101J 100PF C263 C92 0628 05 CHIP TAN 10UF 10WV CC73GCH1H010B 1 0PF CC73GCH1H101J 100PF LN E40 5823 05 FLAT CABLE CONNECTOR 10P CC73GCH1H030C 3 0PF CN2 E40 9517 05 PIN ASSY SOCKET 4P A TK 480 K K2 B TK 481 K K2 Ca Desti mae ues rene sama EE LN CN4 9 CN10 CN11 12 A TK 480 K K2 B TK 481 K K2 E40 5890 05 E23 1002 05 E23 0342 05 E23 1002 05 F53 0130 05 F53 0217 05 L79 1072 05 L72 0924 05 L72 0939 05 L92 0149 05 L40 1095 34 L40 4791 37 L92 0138 05 L40 3985 45 L92 0138 05 L40 1075 92 L40 6865 92 L40 8265 92 L40 6865 92 L79 1464 05 L79 1466 05 L92 0138 05 L40 1075 92 L40 5663 92 L40 2763 92 L92 0138 05 L40 1075 92 L40 8265 92 L40 2275 92 L40 6865 92 L40 1075 92 L40 1275 92 L79 1465 05 L79 1467 05 L40 6865 92 L40 5663 92 L92 0138 05 L40 6865 92 L40 5663 92 L92 0149 05 L92 0138 05 L40 6875 54 L33 0761 05 L40 1075 92 L79 1468 05 L79 1469 05 L33 0760 05 L40 6875 54 L40 8265 92 L40 1075 92 L92 0138 05 L92 0138 05 L77 1760 15 L77
19. 05 ENCODER W09 0900 35 BATTERY ASSY E37 0674 15 E58 0440 05 E 2 0412 13 LEAD WIRE WITH CONNECTOR SP SQUARE SOCKET SP MIC TERMINAL BLOCK DISPLAY UNIT X54 3210 XX 10 K 11 K2 LED RE GR BUSY TX LED BACKLIGHT LED BACKLIGHT D301 B30 2019 05 SHIELDING CASE VCO D305 310 B30 2171 05 SHIELDING PLATE BAND PASS D305 306 B30 2171 05 SHIELDING PLATE P MODULE SHIELDING PLATE LCD C301 CC73GCH1H470J CHIP C 47PF INSULATING SHEET C302 C92 0560 05 CHIP TAN 10UF C304 CK73FB1C474K CHIP C 0 47UF INSULATING SHEET MIC GND C305 CC73GCH1H101J CHIP C 100PF C307 CK73GB1C104K CHIP C 0 10UF F10 2248 13 F10 2253 03 F10 2255 04 F10 2310 03 F20 1192 04 F20 3303 04 G01 0881 04 G09 0418 05 G10 0799 04 G11 0800 04 G11 2544 04 COIL SPRING KNOB SPRING VOL ENC C308 FIBROUS SHEET SP C309 SHEET PTT C310 CK73GB1C104K CHIP C 0 10UF SHEET CHASSIS C311 CC73GCH1H470J CHIP C 47PF C312 CK73GB1C104K CHIP C 0 10UF CC73GCH1H101J CHIP C 100PF CK73FB1C474K CHIP C 0 47UF G13 1731 04 G13 1762 04 G13 1834 04 G53 0811 03 G53 0840 02 CUSHION LCD CUSHION VOL CHASSIS C313 CUSHION TERMINAL C314 PACKING TOP C315 CC73GCH1H101J CHIP C 100PF PACKING 4KEY B 316 317 CC73GCH1H470J CHIP C 47PF C318 CC73GCH1H101J CHIP C 100PF C92 0628 05 CHIP TAN 10UF C92 0647 05 CHIP TAN 3 3UF G53 0841 02 G53 1510 04 G53 1520 24 PACKING 16KEY PACKING BATT 321 333 CC73GCH1H470J CHIP C 47PF PACKING TERM
20. 100K 47K 150K 100K 180K 100K 18K 27K 150K 10K 47K 22K 100K 68K 390K 4 7K 100K 47K 3 3K 1 5K 68K 150K 1 8K 56K 120K 270K 47K 3 3K 2 2K 22 TK 480 481 PARTS LIST TX RX UNIT X57 5630 XX Desti Desti LZ Te s ms 19 ete sas en su A RN73GH1J913D R112 RK73GB1J103J RK73GB1J223J R113 RK73GB1J101J RK73GB1J334J R113 RK73GB1J220J RN73GH1J682D R114 RK73GB1J152J RK73GB1J154J R115 RK73GB1J681J RK73GB1J101J R116 R92 1368 05 RK73GB1J155J R117 RK73GB1J470J RK73GB1J101J R118 R92 1252 05 RN73GH1J683D R120 RK73HB1J102J RK73GB1J474J R121 RK73GB1J473J RK73GB1J560J R122 R92 1252 05 RN73GH1J682D f R123 RK73HB1J102J RK73GB1J101J R124 125 RK73HB1J473J RK73GB1J153J K R126 RK73GB1J103J RK73GB1J223J K R127 129 RK73EB2ER39K RK73GB1J153J R130 135 RN73GH1J154D RK73GB1J224J R136 137 RK73GB1J271J RK73GB1J152J K R138 RK73HB1J103J RK73GB1J222J K R139 R92 1368 05 RK73GB1J103J R140 RK73GB1J103J RK73GB1J223J R141 142 RK73GB1J104J RK73GB1J152J j R143 RK73GB1J105J RK73GB1J103J R144 RK73GB1J473J RK73GB1J153J R145 R92 1252 05 RK73GB1J102J I R146 RK73GB1J222J RK73GB1J473J R147 R92 1252 05 RK73GB1J394J K R148 RK73GB1J223J RK73GB1J684J K R149 RK73HB1J473J RK73GB1J102J R150 RK73HB1J102J RK73GB1J333J K R151 RK73GB1J102J RK73GB1J393J K R152 RK73GB1J332J R92 1252 05 R153 RK73GB1J123J RK73GB1J473J R154 RK73GB1J221J RK73GB1J681J J R159 RK73GB1J101J RK73GB1J154J R156 RK73GB1J103J RK73GB1J470J R157 RK
21. 481 PARTS LIST L Scandinavia K USA P Canada Y PX Far East Hawai T England E Europe Y AAFES Europe X Australia MI Other Areas New Parts A indicates safety critical components Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert TK 480 481 DISPLAY UNIT X54 3210 XX S Desti Desti Bot No tel PartsNo Description padon ES mee s TK 480 481 N30 2605 46 PAN HEAD MACHINE SCREW ANT N30 2610 46 PAN HEAD MACHINE SCREW CASE CABINET ASSY 4KEY N67 2606 46 PAN HEAD SEMS SCREW W P MODULE CABINET ASSY 16KEY N79 2025 46 PAN HEAD TAPTITE SCREW TERMINAL PANEL ASSY N83 2005 46 PAN HEAD TAPTITE SCREW UNIT A02 3658 03 A02 3659 03 A62 0981 04 B09 0363 03 CAP SP MIC ACSY B38 0810 05 LCD ASSY B43 1139 04 BADGE KENWOOD B46 0470 00 WARRANTY CARD B62 1483 00 INSTRUCTION MANUAL N99 2004 05 SCREW SET ACSY R31 0617 05 VARIABLE RESISTOR POWER SW VOL 9 0 0414 05 TACT SWITCH B72 1968 04 B72 1969 04 MODEL NAME PLATE K 46 MODEL NAME PLATE K 47 T07 0714 05 SPEAKER T90 0636 25 WHIP ANTENNA 800MHZ ACSY WHIP ANTENNA 900MHZ ACSY MIC ELEMENT 47 T90 0640 25 RF COAXIAL RECEPTACLE SMA MIC300 TERMINAL ANT RELAY TERMINAL 49 FLAT CABLE CONT TX RX 90 LEAD WIRE WITH CONNECTOR PTT E04 0406 05 E23 1049 04 E23 1166 04 E37 0672 05 E37 0673 05 T91 0579 05 W02 1814
22. IL TXD cia DTA144 ER Verst TK 480 806 15 825 15MHz NJM2904V TK 481 890 15 896 15MHz 777 PROCESSOR L DTC144EE IC1O TATSWOLFU Q5 168 1 2 ER TK 480 2SC4619 XF1 TC75W51FU TA31136FN TK 481 2SC5108 Y 44 85MHz DET DET FM IF let AMP SYSTEM eb MCF ST mix Q6 V A 3SK318 M T42 25sC4617 S M SRC NOISE NOISE A adi DET e IC13 LC73872M SE eu TT Seniesa k CD1 E um i X1 455kHz D8 44 395MHz DCK Pp DEO SRC gt protrectT MA2S111 000mm ee CC eee eee PROTEC H 8 28K 1824 PC L11 TK 480 806 870MHz TK 481 896 941MHz 1K 480 481 LEVEL DIAGRAM TK 480 40j12edeo Buiidnoo5 1d000L e esn uonoes du eui ul Z Z Y Z 11d PU 6919 Ld 2913 6713 Gd 612 9 12 LEL ke ES ODA X ANV A 081 lnpouu ZLO LLO LLO OLD MS TZ JOMOd uedo ZGLD uedo ZLO uedo sq uedo LO u do 0LO ugpge ZL WgpL ugpe L ugpg Ugp LL k HWO08 818 JH vol Z 1 91 vol 1oyOeded Huljdnoo 40000 e asn uonoes JH au ul AJ1934Ip SAINOIA edooso rso y 120uuoo uonoes Jv y u sjuaua nseaul 83641 O CON HAL 18 A9Q zHX S uuoo q Indu SIIN 041 0 106 si DY SULIAUJ 87 SWIAWOLE SUUAWPGL SUUAWLLE SUWIAWE L SUUAWQOCE SUUAWLEE SUMAUJC 6E SUJAU9 9L SUJAUZ LL UO 3 vol 621 dS 119 B div MWO00S H av I IVA a SUJAUlGZ SWJAWGEL CQVNIS gD L u e1qo 0 paJuinbau anjeA indu 5
23. JA GO N gt Audio output Audio GND Not use Power input after passing through the fuse Power output after power switch Power output after power switch Volume level input for audio control Encoder pulse input Encoder pulse input Normally 5V MON when connected GND Normally 5V LAMP when connected GND Normally 5V transmit when connected GND External PF signal Input Clock data output Serial control signal input Serial control signal output Data output for LCD driver decade counter Key scan IC reset output KEY input KEY input DV Audio mute signal output Mute L Unmute H LCD driver chip select output Not use PTT signal input AUX key Input TX LED control Normally 0V lighting 5V RX LED control Normally OV lighting 5V Backlight LED control Normally OV lighting 5V MIC GND MIC signal input Power output after power switch Power input after power switch MIC signal output MIC GND PTT signal output Not use LCD driver chip select input Audio mute signal input Mute L Unmute H 5V GND KEY output KEY output Key scan IC reset input Data input for LCD driver decade counter Serial control signal input Serial control signal output Clock data input External PF signal output Not use Audio GND Audio input EXT INT speaker switch input BTL output for external speaker BTL output for external speaker EXT I
24. TK 481 60dB 12 5 25kHz Spurious Except for IF 1 2 7008 Frequency Stability TK 480 0 00025 30 C to 60 C TK 481 0 00015 30 C to 60 C Channels ad diete u Du u oa TK 480 19MHz TK 481 6MHz Audio Power ET EE 500mW at 1662 less than 5 distortion Typical specifications Transmitter Measurements made per TIA EIA 603 RF Power Output me UR RR CRIT RENTRER NAE 2 5W Bei 1W RF Output Impedance 500 sI EE 60dB leet EE TK 480 16K0F3E 16K0F1D 15K0F2D 14K0F3E 14K0F1D 13K0F2D TK 481 11KOF3E 11KOF1D 10K5F2D A cl ate dette TK 480 45dB TK 481 40dB Audio Distortion 5 0 or less Frequency Stabllilyu EE TK 480 0 00025 30 C to 60 C TK 481 0 00015 30 C to 60 C Channel SOreaG uio bee etai TK 480 64MHz TK 481 45MHz 1K 480 481 TK 480 481 KENWOOD CORPORATION 14 6 Dogenzaka 1 chome Shibuya ku Tokyo 150 8501 Japan KENWOOD SERVICE CORPORATION P O BOX 22745 2201 East Dominguez Street Long Beach CA 90801 5745 U S A KENWOOD ELECTRONICS CANADA INC 6070 Kestrel Road Mississauga Ontario Canada L51 1S8 KENWOOD ELECTRONICS DEUTSCHLAND GMBH Rembrucker Str 15 63150 Heusenstamm Germany KENWOOD ELECTRONICS BELGIUM N V Mechelsesteenweg 418 B 1930 Zaventem Belgium KENWOOD ELECTRONICS FRANCE S A 13 Boulevard Ney 75018 Paris France KENWOOD ELECT
25. VCO and modulated by the signal from the microphone It is then amplified and sent to the antenna TK 480 TX 806 825MHz 851 870MHz TK 481 TX 896 902MHz 935 941MHz RX 851 870MHz RX 935 941MHz CF 1st MIX MCF Co 44 395 MHz TK 480 d 806 15 825 15MHz TK 481 890 15 896 15MHz TK 481 896 902MHz 935 941MHz TK 480 806 825MHz 851 870MHz Fig 1 Frequency configuration 3 Receiver System 3 1 RF unit An incoming RF signal from the antenna terminal is passed through the antenna switch D7 D9 and D10 are off and then the bandpass filter L11 The signal is ampli fied by RF amplifier Q9 and passed through the bandpass filter L20 to remove the spurious signal again The result ing signal is applied to the first mixer Q6 where it is mixed with the first local oscillator signal output from the fre quency synthesizer to produce the first IF 44 85MHz 3 2 IF unit The first IF signal is passed through a four pole mono lithic crystal filter XF1 to remove a adjacent channel signal The filtered first IF signal is amplified by the first IF amplifier Q5 and then applied to the IF system IC IC9 The IF sys tem IC provides a second mixer second local oscillator lim iting amplifier quadrature detector and RSSI Received Sig nal Strength Indicator The second mixer mixes the first IF signal with the 44 395MHz of second local oscillator output crystal unit X1 and produces the second I
26. code ID or one of two fixed IDs except block IDs When a call is received with a selectable decode ID the call indicator flashes When a call is received with a fixed ID the call indi cator lights continuously On a conventional system the call indicator can be pro grammed to light for each OT or DOT code It keeps flashing while a call is being received It is turned off by pressing any front panel key 4 9 Free system ringback This feature is available only when a telephone intercon nected ID code is selected If a busy tone sounds when the PTT button is pressed the transceiver enters this mode au tomatically When the PTT button is released a beep sounds for 400ms to indicate that the mode has been entered If the scan Is on it is resumed the SCN mark goes on When any repeater becomes available a ringing tone sounds and this mode ends The mode is terminated when the system group scan PTT key is changed 4 10 System search This feature can be programmed to automatically access other programmed systems when the selected system can not be accessed If an intercept tone sounds when the PTT button is pressed after setting the mode the transceiver has entered the mode If the group ID is a telephone interconnect ID the trans ceiver then attempts to access in succession other sys tems that have a telephone interconnect ID in the revert group location If the group ID is a dispatch ID the trans ceiver attemp
27. the scan sequence press the key when the system is displayed The Delete p indicator is displayed on the left of the SYSTEM indicator TK 480 481 OPERATING FEATURES To unlock a system select the system and press the key The Delete p indicator disappears to indicate that the sys tem has returned to the scan sequence The revert system Is scanned even if it is locked out If there a locked system the Delete p indicator flashes during fixed scanning If all systems are locked out the scan stops and only the revert system Is received 3 3 Drop out delay time Scan resume time If a call is received during scan the scan stops The scan resume time can be programmed as 0 to 300 seconds in one second increments The default value is 3 seconds 3 4 Dwell time The dwell time is the time after transmission ends until the scan resumes in scan mode It can be set 0 to 300 sec onds by programming The default value is 3 seconds 3 5 System Group revert System Group revert can be programmed for one of the following B Last called revert The system or group changes to the revert system or group when a call is received with the system or group be Ing scanned B Last used revert If a system group call is received during scanning and the PTT button is pressed for transmission and response within the drop out delay time the system or group is assigned as the new revert system or group B Selected revert If the system
28. this feature to the key This feature accesses the TEL channel of the available system automatically When the key is pressed a queue tone is output and the AUTO TEL appears on the alphanumeric display along with a flashing handset indicator J to indicate that this mode has been entered If the TEL ID is set for the revert system the TEL channel of that system is accessed If all TEL channels are busy an attempt is made to access the TEL channels of another system in which the TEL ID code has been programmed It is repeated for 60 seconds until the access succeeds If the access succeeds a dial tone returns from the repeater If the key is pressed again when the queue tone is sounding this mode is canceled If the access fails after 60 seconds a deny tone is output and this mode is terminated When the talk ends the revert system group returns When the scan mode is effective the scan resumes The Auto TEL feature can be programmed to turn on or off for each system E ARO mode If affects Trunking mode only Automatic Repeat Re quest ARQ mode is a manner to minimize the air traffic of data communication Also it enables to occupy the trunking repeater channel for the data communication period E Data TX with OT DOT Whether programmed OT DOT is modulated or not with a data transmission except for Selcall A radio unit can re ceive a data message regardless of QT DOT if the receiving unit is not scanning TK 480 481 OP
29. 0 E Emo O Y y Y YIII R Le l r tk Component side Pattern 1 9 Gees Pattern 3 Pattern 4 Foil side 0303 10R D300 6M D319 5L 0304 9H D302 9G 0320 a 0305 9H D303 9 0321 4P in 44 N UJ DISPLAY UNIT X54 3210 XX 10 K 11 K2 Component side view Foil side L LL LLL LL ym Iis wl III RK akg ER d viiy Y YVIIY Yo ico zx 0306 am 0309 ox pas ow Q300 sb 0308 7L 0305 ox 0317 oN 0301 6L 0309 9 0306 6k D318 ON 0302 116 0310 7M D307 9N 0319 5H 0303 108 D300 6G D308 7N D320 e 0304 9L D301 10A D309 90 0321 4D 9305 9L 0302 9M 0310 79 i N m u IE C EM md E O 11 Component side Pattern 1 Pattern 2 Pattern 3 Pattern 4 Il Foil side Connect 1 and 4 14 10 11 12 13 14 DTA144EE 2SB1132 DTC114EE DTC144EE 2SA1832 D 2SC4617 Ce 25C4619 ZK 2SC5108 MA742 3SK318 G1 S E bs sg LD GE Component side Pattern 1 2SB798 2SC4988 DA221 Pattern 2 Pattern 3 2 Pattern 4 lt ce Pattern 5 c B 3 Pattern 6 Foil side 3SK274 UPA672T 25 243 S 81350HG KD 2SK1824 O 48 A B C D E F G H K L M N O PC BOARD wem TK 480 481
30. 1 CC73GCH1H101J CHIP C 100PF CK73GB1H122K 1200PF C162 CC73GCH1H270J CHIP C 27 CK73GB1H102K 1000PF C163 CK73FB1C474K CHIP C 0 47UF CK73GB1H102K 1000PF C164 165 CC73GCH1H101J CHIP C 100PF CC73GCH1H030C 3 0PF C166 CC73GCH1H010C CHIP C 1 0PF CC73GCH1H1R5B 1 5PF C166 CC73GCH1HR75C CHIP C 0 75PF CC73GCH1H391J 390PF C167 CC73GCH1H101J CHIP C 100PF CK73GB1H821K 820PF C168 CC73GCH1H020C CHIP C 2 0PF C92 0560 05 10UF 0169 172 CC73GCH1H101J CHIP C 100PF CK73GB1C104K 0 10UF 6173 CC73GCH1H020C CHIP C 2 0PF CC73GCH1H101J 100PF C174 CC73GCH1H1R5C CHIP C 1 5PF CK73GB1C473K 0 047UF C175 CC73GCH1H030C CHIP C 3 0PF CK73GB1C104K 0 10UF C176 CC73GCH1H010C CHIP C 1 0PF C92 0507 05 4 7UF C176 CC73GCH1HR75C CHIP C 0 75PF CC73GCH1H1R5B 1 5PF 6177 CK73GB1C473K CHIP C 0 047UF CK73GB1C104K 0 10UF C178 180 CC73GCH1H101J CHIP C 100PF CK73GB1C473K 0 047UF C181 182 CK73GB1E103K CHIP C 0 010UF CK73GB1H472K 4700PF C183 CC73GCH1H101J CHIP C 100PF CK73GB1H332K 3300PF C184 CC73GCH1H030C CHIP C 3 0PF CK73GB1H102K 1000PF 6185 CC73GCH1H101J CHIP C 100PF CC73GCH1H470J 47PF C186 CC73GCH1H1R5C CHIP C 1 5PF CK73GB1E103K 0 010UF 6187 CC73GCH1H101J CHIP C 100PF CC73GCH1HR75C 0 75PF C188 191 CC73GCH1H470J CHIP C 47PF CC73GCH1H101J 100PF C192 CC73GCH1H101J CHIP C 100PF CK73GB1E153K 0 015UF C193 CC73GCH1H020C CHIP C 2 0PF CC73GCH1H1R5C 1 5PF C193 CC73GCH1H1R5C CHIP C 1 5PF CC73GCH1H030C 3 0PF 0194 199 CC73GCH1H101J CHIP C 100PF C92 0507 05 4 7UF C200 CK73GB1E103K CHIP C 0 010UF CK73GB1E103K 0
31. 1 IC14 SUM AMP D A AF 12 02 MUTE YC BR IC4 IC1 X2 D A BUFF I1 O1 AMP Fig 6 Microphone amplifier From T R SW D5 B Fig 7 Drive and final amplifier and APC circuit 1K 480 481 CIRCUIT DESCRIPTION 5 Frequency Synthesizer Unit 5 1 Frequency synthesizer The frequency synthesizer consists of the VCXO X2 VCO IC14 PLL IC IC11 and buffer amplifiers The VCXO generates 16 8MHz The frequency stability is 1 5ppm within the temperature range of 30 to 60 C The frequency tuning and modulation of the VCXO are done to apply a voltage to pin 1 of the VCXO The output of the VCXO is applied to pin 8 of the PLL IC The TK 480 s VCO covers a dual range of the 806 825MHz and the 851 870MHz The VCO generates 806 15 825 15MHz for providing to the first local signal in receive In TA mode the pin 1 of the VCO goes low and the VCO generates 851 870MHz The TK 481 s VCO covers a dual range of the 896 902MHz and the 935 941MHz The VCO generates 890 15 896 15MHz for providing to the first local signal in receive In TA mode the pin 1 of the VCO goes low and the VCO generates 935 941 MHz The output of the VCO is amplified by the buffer amplifier Q8 and routed to the pin 5 of the PLL IC Also the output of the VCO is amplified by the two buffer amplifier Q10 Q1 7 and routed to the next stage according to T R switch D4 D5 The PLL IC consists of a prescaler fractional divider ref erence divider
32. 12 Key Press Tone C Sounds when a key is pressed Also sounds when stor ing data adding a DIMF code to memory and when chang ing test mode settings You can select yes or no for the optional feature s control tone 7 13 Key Input Error Tone Sounds when a key is pressed but that key cannot be used You can select yes or no for the optional feature s warning tone 7 14 Roll Over Tone Sounds at the smallest system group You can select yes or no for the optional feature s control tone 7 15 Transpond Tone Sounds when an individual call with the correct LTR DIMF option signalling is received For group calls only the group tone will sound not the transpond tone 1K 480 481 OPERATING FEATURES REALIGNMENT 7 16 Intercept Tone This tone indicates that the transceiver is out of range It indicates that the PTT button is pressed and transmission has started but the repeater cannot be connected and talk Ing is not possible It is output until the PTT button is re leased Ihe mid tone and low tone are output alternately in 200ms intervals 7 17 Delay Tone This tone is output when the PTT button is pressed and the repeater is accessed three times or more to indicate connection with the repeater is delayed This tone is the same as the busy tone lt is not output of clear to talk has been set to yes 7 18 Proceed Tone This tone is output when the PTT button is pressed transmission starts and the repeater is
33. 1699 15 L77 1708 05 L78 0462 05 L71 0501 05 L71 0502 05 PARTS LIST FLAT CABLE CONNECTOR 24P TERMINAL TEST TERMINAL TERMINAL FUSE 3A FUSE 3A TUNING COIL CERAMIC FILTER 455KHZ CERAMIC FILTER 455KHZ FERRITE CHIP SMALL FIXED INDUCTOR 1UH SMALL FIXED INDUCTOR 4 700UH FERRITE CHIP SMALL FIXED INDUCTOR 0 39UH FERRITE CHIP SMALL FIXED INDUCTOR 10NH SMALL FIXED INDUCTOR 6 8NH SMALL FIXED INDUCTOR 8 2NH SMALL FIXED INDUCTOR 6 8NH DIELECTRIC FILTER 860MHZ DIELECTRIC FILTER 938MHZ FERRITE CHIP SMALL FIXED INDUCTOR 10NH SMALL FIXED INDUCTOR 5 6NH SMALL FIXED INDUCTOR 2 7NH FERRITE CHIP SMALL FIXED INDUCTOR 10NH SMALL FIXED INDUCTOR 8 2NH SMALL FIXED INDUCTOR 22NH SMALL FIXED INDUCTOR 6 8NH SMALL FIXED INDUCTOR 10NH SMALL FIXED INDUCTOR 12NH DIELECTRIC FILTER 860MHZ DIELECTRIC FILTER 938MHZ SMALL FIXED INDUCTOR 6 8NH SMALL FIXED INDUCTOR 5 6NH FERRITE CHIP SMALL FIXED INDUCTOR 6 8NH SMALL FIXED INDUCTOR 5 6NH FERRITE CHIP FERRITE CHIP SMALL FIXED INDUCTOR 68NH SMALL FIXED INDUCTOR SMALL FIXED INDUCTOR 10NH FILTER MODULE 870MHZ FILTER MODULE 960MHZ SMALL FIXED INDUCTOR SMALL FIXED INDUCTOR 68NH SMALL FIXED INDUCTOR 8 2NH SMALL FIXED INDUCTOR 10NH FERRITE CHIP FERRITE CHIP CRYSTAL RESONATOR 44 395MHZ VCXO 16 8MHZ CRYSTAL RESONATOR 3 579545MHZ RESONATOR 9 8304MHZ MCF 44 85MHZ MCF 44 85MHZ TK 480 481
34. 3GB1C104K CC73GCH1H101J CK73GB1C104K CK73GB1H472K CK73GB1H471K C92 0560 05 CK73GB1C333K CC73GCH1H820J C92 0560 05 CC73GCH1H101J CC73GCH1H221J CC73GCH1H101J CK73FB1C334K CK73GB1E103K C92 0513 05 C92 0662 05 CC73GCH1H220J CC73GCH1H221J CK73GB1E223K CC73GCH1H220J CK73GB1H102K CK73GB1E223K CK73GB1H102K CC73GCH1H150J CK73GB1H222K CK73GB1E153K CK73GB1C104K CC73GCH1H101J CC73GCH1H100D CC73GCH1H040C CK73GB1E103K CC73GCH1H101J CC73GCH1H271J CK73GB1H103K CK73GB1C104K CK73GB1H122J CC73GCH1H040C C92 0559 05 CK73GB1E103K CC73GCH1H101J DISPLAY UNIT X54 3210 XX TX RX UNIT X57 5630 XX ES Desti Fco JJ ro 09909 TX RX UNIT X57 5630 XX 10 TK 480 11 TK 481 CHIP C CHIP C CHIP C CHIP TAN CHIP C CHIP C CHIP C CHIP TAN CHIP C CHIP TAN CHIP TAN CHIP C CHIP C CHIP C CHIP C CHIP TAN CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP TAN CHIP C CHIP C CHIP TAN CHIP C CHIP C CHIP C CHIP C CHIP C CHIP TAN CHIP TAN CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP C CHIP TAN CHIP C CHIP C 0 010UF K 100PF J 0 010UF K 4 7UF 100PF 0 022UF 0 10UF 4 7UF 0 10UF 4 7UF 1 0UF 10PF 100PF 0 10UF 100PF 4 7UF 1 0UF 0 012UF 0 10UF 100PF 0 10UF 4700PF 470PF 10UF 0 033UF 82PF 10UF 100PF 220PF 100PF 0 33UF
35. 480 481 This allows the TK 480 481 to be upgraded when new features are re leased in the future For details on how to obtain the firm ware contact Customer Service 6 2 Connection procedure Connect the TK 480 481 to the personal computer IBM PC or compatible with the interface cable KPG 36 Con nection is the same as in the PC Mode 6 3 Programming 1 Start up the programming software KPG 49D select firmware program in the Program item and press the Return key on the personal computer This starts up the firmware programmer 2 The top screen is displayed Press any key to advance to the next screen 3 Set the communications speed normally 57600 bps and communications port in the Setup item Set the firmware to be updated by File select F1 5 Turn the TK 480 481 power ON with the S switch held down Hold the switch down for two seconds until the display changes to PROG 57600 When PROG 5 600 appears release your finger from the switch 6 Check the connection between the TK 480 481 and the personal computer and make sure that the TK 480 481 is in the Program mode 7 Press F10 on the personal computer A window opens on the display to indicate progress of writing When the TK 480 481 starts to receive data the P icon is blinking 8 If writing ends successfully the LED on the TK 480 481 lights and the checksum is displayed 9 If you want to continue programming other TK 480 481 s re
36. 5 speaker microphone op tional here Otherwise keep the supplied cover in place MONITOR and LAMP are arbitrary names chosen for these buttons They can be used for any of the auxiliary functions 2 3 Programmable keys The FPU KPG 49D enables programmable keys to se lect the following functions Auto Tel AUX only when Voice Scrambler is not se lected DTMF ID BOT DTMF ID EOT Display Character Emergency only AUX key Function Group Down Group Up Home Group Key Lock Lamp Memory RCL STO Memory RCL Memory STO Monitor A Monitor B Moni tor C Monitor D Redial RF Power Lo Scan Scan Del Add Scan Temporary Delete Scrambler Only when Voice Scrambler is selected SP Attenuation Only MIC switch System Down System Up TEL Disconnect and none These functions the FPU programs to the function keys are described in the following sections TK 480 481 OPERATING FEATURES B Auto TEL Automatically connects available repeaters that are con nected to telephone circuits when operating as LTR system The time allocated to search for available repeaters is 60 seconds after which connection failure occurs a DTMF tone 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 BH AUX This function can be programmed when the voice scram bler board is not installed If this key is pressed an underscore
37. 73GB1J102J RK73GB1J220J R158 RK73GB1J223J RK73GB1J103J R159 160 RK73GB1J102J RK73GB1J104J R161 162 RK73GB1J184J RK73GB1J100J R163 RK73GB1J104J RK73GB1J150J R164 RK73GB1J473J RK73GB1J272J R165 RK73GB1J150J RK73GB1J150J R165 R92 1252 05 RK73GB1J223J R166 RK73GB1J103J RK73GB1J104J R167 RK73GB1J123J RK73GB1J184J R168 RK73GB1J333J RK73GB1J121J K R169 RK73GB1J223J RK73GB1J820J K R170 RK73GB1J473J RK73GB1J221J K R171 RK73GB1J823J RK73GB1J223J R200 207 RK73HB1J102J RK73GB1J182J R211 RK73HB1J103J RK73GB1J102J I R218 RK73HB1J473J RK73HB1J102J R248 R92 1252 05 RK73GB1J122J R250 R92 1252 05 RK73GB1J473J R259 R92 1252 05 RK73GB1J103J R276 R92 1252 05 RK73GB1J682J R297 298 RK73HB1J473J RK73GB1J470J R408 RK73HB1J473J RK73GB1J473J R417 RK73GB1J474J RK73GB1J223J R418 RK73GB1J104J A TK 480 K K2 B TK 481 K K2 sn Desti mae Ju rene sama MES R419 422 R423 D1 D2 D3 D6 IC18 19 IC21 IC23 IC30 IC30 01 02 03 4 05 05 06 07 A TK 480 K K2 B TK 481 K K2 R92 1252 05 RK73GB1J473J 15R154 400 MA2S111 MA742 MA2S077 UDZS4 7B HVU131 MA2S111 MA2S077 MA742 MA2S111 DA221 TA75W01FU RN5VL42C TC75W51FU M62364FP S 81350HG KD NJU7201U50 TK11250BM TC75W51FU TA31136FN TA75W01FU SA7025DK TC35453F LC73872M KCH31 KCH32 30622M8A 4F9GP AT2408N10812 5 AT29C020 90T W29C020C90 BU4094BCFV NJM2904V TA75S01F M68757L M68757H 2SJ243 25A1832 GR 2SC4617 S 2SC4619 2SC510
38. 8 Y 3SK318 2SK1824 2SC5108 Y 3SK274 2SC5108 Y 2504988 25K1824 DTC114EE DTA144EE DIC114EE 2S5C5108 Y 25K1824 2SC4617 S DIC144EE 25K1824 157 503 65001 CHIP R 0 OHM CHIP R 47K DIODE DIODE DIODE DIODE ZENER DIODE DIODE DIODE DIODE DIODE DIODE DIODE IC BUFFER AMP J TK 480 481 PARTS LIST 1 16W IC VOLTAGE DETECTOR RESET IC SUMMING AMP IC D A CONVERTER IC VOLTAGE REGULATOR 5M IC VOLTAGE REGULATOR 5V IC VOLTAGE REGULATOR 5C IC BUFFER AMP IC FM IF SYSTEM IC ACTIVE FILTER IC PLL SYSTEM IC AUDIO PROCESSOR IC DTMF DECODER HIC VCO SYSTEM HIC VCO SYSTEM IC MICROPROCESSOR IC EEPROM IC AND GATE IC AND GATE IC SHIFT REGISTER IC COMPARATOR IC ACTIVE FILTER IC POWER MODULE IC POWER MODULE FET TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR FET FET TRANSISTOR FET TRANSISTOR TRANSISTOR FET DIGITAL IRANSISTOR DIGITAL IRANSISTOR DIGITAL IRANSISTOR TRANSISTOR FET TRANSISTOR DIGITAL IRANSISTOR FET THERMISTOR TX RX UNIT X57 5630 XX E Desti Cae as reme o 9909 29 1K 480 481 EXPLODED VIEW Display unit A 2 N14 0569 04 M2 6x5 N30 2605 46 M2 6 x 10 N30 2610 46 M2 6x 6 N67 2606 46 N MU gt gt 2 M2 x 5 N83 2005 46 M2 x 2 5 N79 2025 46 When you repair or exchange the display unit please exchange the sheet 24 as well 24 X i
39. 800MHz 900MHz FM TRANSCEIVER TK 480 481 SERVICE MANUAL REVISED I This service manual applies to products with 30100001 or subsequent serial numbers Whip antenna e T90 0636 25 TK 480 T90 0640 25 TK 481 Knob ENC K29 5232 03 Knob VOL K29 5231 03 Panel assy A62 0981 04 Knob PTT K29 5157 03 um B Cabinet assy H A02 3659 03 K2 Packing G53 0841 02 K2 RE Le Photo is TK 480 481 K2 type Produced in Singapore KENWOOD 2001 3 PRINTED IN JAPAN B51 8408 20 N 1015 CONTENTS GENERAL eege 2 SYSTEM SET UP sides 2 OPERATING FEATURES 3 REALIGNMENT oiiaii pc e eul 11 CIRCUIT DESCRIPTION 14 SEMICONDUCTOR DATA 20 DESCRIPTION OF COMPONENTS 23 PARTS US Diosas 24 EXPLODED VIEW 2 eege ea Nee 30 PACKING tinet imm eid 31 ADJUSTMENT ociosa 32 TERMINAL FUNCTION 40 PC BOARD VIEWS DISPLAY UNIT X54 3210 XX 41 TX RX UNIT X57 5630 XX 47 SCHEMATIC DIAGRAM 53 BLOCK DIAGRAMI 57 LEVEL DIAGRAM TK 480 59 LEVEL DIAGRAM TK 481
40. A A 896 941MHz e SHUT OFF this equipment when near electrical blasting caps or while in an explosive atmosphere e his equipment should be serviced by only qualified tech nicians SERVICE This radio is designed for easy servicing Refer to the schematic diagrams printed circuit board views and align ment procedures contained within NOTE WE CANNOT guarantee oscillator stability when using channel elements manufactured by companies other than KENWOOD or its authorized agents You must use the KPG 49D to program TK 480 481 trans ceivers with a serial number of 30100001 or greater You cannot use the KPG 35D for those radios TK 480 481 transceivers with a serial number of 30100001 or greater have a red triangle in the KENWOOD logo label B43 1139 04 on the front panel You will also find the model name plate marked as Ver 2 0 on the rear of the transceiver ow be ii un J IF1 44 85MHz TK 480 IER 806 870MHz i ee ia ial Y Y Option Tk e lv Note X57 5630 XX X54 3210 XX Produced in Singapore SYSTEM SET UP Merchandise received License and frequency allocated by FCC Choose the type of transceiver Transceiver programming Are you using the speaker microphone l m o Delivery LOC 44 395MHz m Frequency range MHz RF power 806 825 851 870 851 870 2 5W TK 480 K K2 TK 481 K K2 896 902 935 941 935 941 A personal computer IBM PC or compatible programming interface
41. B TK 481 K K2 RK73GB1J103J RK73FB2A101J RK73GB1J470J RK73GB1J471J RK73GB1J182J RK73GB1J104J R92 1252 05 RK73GB1J821J RK73GB1J153J R92 1252 05 RK73GB1J331J RK73GB1J102J RK73GB1J104J RK73GB1J102J RK73GB1J104J RK73GB1J473J RK73GB1J472J RK73GB1J104J RK73GB1J820J RK73GB1J820J RK73GB1J102J RK73GB1J102J RK73GB1J124J RK73GB1J563J RK73GB1J124J RK73GB1J103J RK73GB1J272J RK73GB1J103J R92 1252 05 RK73GB1J472J RK73GB1J101J 9 0 0457 05 NNCD6 8G 155373 015AZ2 4 X MA2S111 IMN10 MA2S111 MA2S111 IMN10 015AZ6 8 TDA7053AT TC74HC4017AF 2SJ243 UPA672T 2SC4617 S 2SB798 DL DK 2SC4617 S 25B1132 0 R UPA672T 2SC4617 S 25K1824 TN10 38154JT CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R CHIP R 100 TACT SWITCH PTT ZENER DIODE DIODE ZENER DIODE DIODE DIODE DIODE DIODE DIODE ZENER DIODE IC AUDIO AMP IC COUNTER FET FET TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR FET TRANSISTOR FET THERMISTOR PARTS LIST TK 480 481 CK73GB1E103K CC73GCH1H101J CK73GB1E103K C92 0507 05 CC73GCH1H101J CK73GB1E223K CK73GB1C104K C92 0507 05 CK73GB1C104K C92 0507 05 C92 0576 05 CC73GCH1H100D CC73GCH1H101J CK73GB1C104K CC73GCH1H101J C92 0507 05 CK73FB1A105K CK73GB1E123K CK7
42. Beat Disable If the D B D code matches a predetermined action will occur Whether option signalling is activated or not when D B D matches on any group the transceiver will become TX inhibited or TX RX inhibited While D B D is active if the D B D code code is received D B D will disactivate When D B D matches transpond will function Alert will not be output and option signalling match icon will not ap pear 5 2 MSK Built in MSK FleetSync Fleet ID decoder is available for option signalling When the group ID matches squelch remains muted while the station waits for reception of proper MSK signal When MSK signal matches squelch unmutes m AND OR AND OT DOT ID MSK to unmute MSK matches alert tone OR QT DOT ID to unmute MSK matches alert tone 6 Alphanumeric Two way Paging Function FleetSync 6 1 General The Alphanumeric Two way Paging Function FleetSync is a Kenwood proprietary protocol It enables a variety of paging functions 6 2 ID Construction A radio unit ID is defined by a combination of 3 digit Fleet and 4 digit ID numbers Each radio unit must be assigned Its own Fleet and ID numbers 6 3 PTT ID A pre programmed unique ID Own can be sent at the beginning of transmission and or the end of transmission to identify which radio unit is on air When selecting Sel for MSK ID the radio calls the spe cific Fleet user the same as selective call 6 4 Selective
43. Call SELCALL This is a voice call to a particular individual or group of stations B Example of call types 100 ALL Group Call All the units whose fleet number is 100 are called 100 1000 Individual Call The unit whose the fleet number is 100 and ID num ber is 1000 is called ALL ALL Broadcast Call All the units are called ALL 1000 Supervisor Call All ID 1000 are called regardless of their fleet number B Unit ID Encode Block Encode ID Block can be set to limit manual dial ID The radio unit will not accept an ID other than these IDs which are entered from the keypad If Inter fleet Call is enabled block ID setting affects each fleet group 6 5 Status Message Using a 2 digit number you can send and receive a Sta tus message which may be decided in your talk group Each Status may be displayed with 16 alphanumeric characters if programmed in the radio A maximum of 9 received mes sages can be stored in the stack memory and it can be re viewed after reception If the message memory becomes full the oldest one will be erased The stack memory will be cleared by turning radio power off 1K 480 481 OPERATING FEATURES B Status 80 99 Special Status numbers from 80 to 99 are reserved for special purposes Entering these statuses from the DTMF keypad can be inhibited Please notice that the following status numbers are used for special purposes 80 87 Reserved for f
44. Condition Test Specifications Remarks Terminal 22 BATT 1 SYS GRP 4 1 Power meter Panel ANT Panel Encoder Check Can not transmit detection BATT terminal voltage 5 7V Deviation knob LED TX blinks check PTT ON meter Oscilloscope 2 BATT terminal voltage 6 5V Transmit PTT ON AG AF VIVM Note When the CPU is changed these adjustment values will become suitable values for NPSPAC the deviations except MAX DEV in NPSPAC band are automatically adjusted Receiver Section Measurement Condition Test Specifications Remarks Terminal 1 Sensitivity 1 SYS GRP 1 1 Panel ANT Check 12dB SINAD or more check SSG output 116dBm MOD 1kHz AF VIVM DEV 3kHz TK 480 Oscilloscope 1 bkHz TK 481 Distortion meter 2 Squelch 1 SYS GRP 4 Panel Encoder Adjust to point of adjustment Select SOL knob closing squelch in tuning mode SSG output 3dB below to 12dB SINAD level 1 R i 3 Squelch SYS GRP 4 1 Check Squelch must be opened check SSG output 12dB SINAD level See Note 2 SSG output OFF Squelch must be closed Note When squelch is adjusted the microcomputer simultaneously reads and writes the RSSI level Do not write adjustment values without the SSG connected 39 TK 480 481 TX RX UNIT X57 5630 XX TERMINAL FUNCTION TX RX section Power input after passing through the fuse GO N a GND GND cy 00558 or GND O O 01 P GO N gt
45. ERATING FEATURES 5 Option Signalling 5 1 DTMF Built in DTMF decoder is available for option signalling It Is possible to use individual call group call D B D Dead Beat Disable D B D is used with DTMF only If the option signalling matches a predetermined action will occur If option signalling matches on a group which is set up with option signalling the option signalling indicator 3 will flash and option signalling will be released The transpond or alert tone will sound If the selective call alert LED is set up the orange LED will flash While option signalling matches or if option signalling is deactivated when you are transmitting you can mute or unmute ID OT DOT Carrier E AND OR You can select AND or OR for option signalling match conditions Fa Alert Transpond OT DOT ID DTMF Option matches Action OR QT DQT ID DTMF Option matches Action C E an OT DOT ID DTMF Option matches Action OR OT DOT ID Signalling only matches Action With OR set up alert transpond will not function with only DIMF With OR set up AF mute will not release when only DIMF matches With a conventional group not set up with QT or DOT only the carrier is considered when signalling matches E Auto Reset If option signalling matches a group set up with option signalling option signalling is released After matching op tion signalling option signalling will temporarily reset auto matically B Dead
46. F signal of 455kHz The second IF signal is passed through the ceramic filter CF1 2 to more remove the adjacent channel signal The filtered second IF signal is amplified by the limiting amplifier and demodulated by the quadrature detector with ceramic discriminator CD1 The demodulated signal is routed to the audio circuit ANT Y L11 09 L20 06 XF1 05 108 2 2 L30 D9 D10 BPF RFAMP BPF 1stMIX MCF 1stliF AF AMP ANT lt 7 IC9 E ARDEN ED inr x1 CF1 T Us 1st local 2nd local OSC PLL OSC IC300 e EE E IC3 2 2 n HPF LPF HPF BEF AF AMP IC4 0310 RES DE AF AF gt V ee EN A ps Pee Elle gt heslo L A JU A U A A A A LJ U rn J JU LLL INT ice s eeu pr EXT SP Kr Vc2 Fig 2 Receiving system 1K 480 481 CIRCUIT DESCRIPTION 3 3 Audio amplifier circuit The demodulated signal from 1069 is amplified by IC8 2 2 high pass filtered low pass filtered high pass filtered band eliminate filtered and de emphasized by IC 12 The signal then goes through an AF amplifier IC3 2 2 an electronic volume control IC4 and an AF switch 0310 is on and is routed to audio power amplifier IC300 where it is amplified and output to the internal speaker The audio mute signal AM from the microcomputer be comes Low in the standby and Q304 Q305 which are power supply circuit for IC300 turn off Also IC12 is set to the power down mode according
47. INAL C335 339 CC73GCH1H470J CHIP C 47PF C340 CK73GB1E153K CHIP C 0 015UF PACKING FIXTURE 0341 344 CC73GCH1H470J CHIP C 47PF ITEM CARTON CASE ITEM CARTON CASE K CN300 E40 5891 05 CN301 E40 5892 05 J19 1572 04 HOLDER CN302 E40 5662 05 J21 8321 03 HARDWARE FIXTURE P MODULE CN303 E40 5887 05 J29 0658 05 HOOK ACSY CN304 E40 5823 05 J82 0045 05 FPC VOL ENC H12 3014 02 H52 1096 12 H52 1097 12 FLAT CABLE CONNECTOR 24P FLAT CABLE CONNECTOR 14P PIN ASSY SOCKET SP PIN ASSY PTT FLAT CABLE CONNECTOR LCD J82 0046 05 K29 5157 03 K29 5158 03 K29 5165 03 K29 5231 03 K29 5232 03 N14 0569 04 FPC SOCKET KNOB PTT KEY TOP PTT LEVER KNOB KNOB VOL KNOB ENC CIRCULAR NUT VOL ENC L300 301 L302 303 L304 305 L306 307 L308 309 CP300 301 CP302 CP303 L92 0141 05 L92 0138 05 L92 0141 05 L92 0138 05 L92 0141 05 R90 0723 05 R90 0724 05 R90 0724 05 FERRITE CHIP FERRITE CHIP FERRITE CHIP FERRITE CHIP FERRITE CHIP MULTI COMP MULTI COMP MULTI COMP A TK 480 K K2 B TK 481 K K2 Desti eech er sees E R300 R301 R302 R303 R304 R305 R306 R307 R308 R309 R310 R311 R312 R313 314 R315 R316 R317 R318 R319 R320 321 R324 R325 R326 R327 R328 R331 R332 R333 R336 R337 R338 341 S301 303 D300 D302 D303 D304 D315 D316 D317 D318 D319 321 IC300 IC301 0300 0301 0302 304 0305 0306 0307 0308 0309 0310 TH300 A TK 480 K K2
48. In Conventional system If QT or DOT is set for the channel the channels includ ing signalling are scanned In case of the priority group is set in conventional sys tem if a group scan including group scan during a system scan temporarily stops receiving in a group that does not have priority a look back is performed to the priority group Look back is performed according to the look back time A and B settings If a call is received on the priority group re ception immediately switches to the priority group 4 Details of Features 4 1 Time out timer The time out timer can be programmed in 15 seconds increments from 15 seconds to ten minutes If the transmit ter is keyed continuously for longer than the programmed time the transmitter is disabled and a warning tone sounds while the PTT button is held down The alert tone stops when the PTT button is released 4 2 Sub LCD You can use 3 digit the display to display the system number channel number or group number It is useful when the main 12 digit display indicates system group or chan nel name or other functions 4 3 Selective Call Alert LED You can select whether or not the LED on the transceiver flashes in an orange color when selective call was occurred 4 4 PTT ID PTT ID provides a DIMF ANI or MSK ID to be sent with every time PTT connect ID at beginning of transmission disconnect ID at end of transmission or both You can program PTT ID on or of
49. N O D O Y MID m CX 1K 480 481 ADJUSTMENT e Panel tuning 2 RED RX AF OUTPUT 3 BLACK RX AF OUTPUT 5 WHITE MIC INPUT 6 BROWN MIC GND 7 BLUE PTT SW GND gt ON 8 YELLOW PF SW 10 BROWN GND 11 GREEN 5M BLU 7 To Radio PTT SW BRN 10 100 10V RED 2 AF Voltmeter BLK 3 T 100 10V WHT Audio generator PC tuning Connect the wires to the PCB in the connector case of interface cable For output the wires out of the connector case need to process the connector case Remove the screw Connector case PCB layout 100u 10 V 160 100u 10 V AF voltmeter H 10u 10 V H Audio generator Shield Repair Jig Chassis Use jig part No W05 0825 00 for repairing the TK 480 481 The jig facilitates the voltage check and protects the module when the voltage on the flow side of the TX RX unit is checked during repairs Battery terminal Power module 2 TX RX unit How to Remove the Flat Cable 1 Gently draw out both sides of the connector lever uni formly in the direction of the arrow with tweezers CN300 CN301 2 Gently prise up the connector lever in the direction of the arrow with a fine regular screwdriver or tweezers CN1 CN3 CN304 Regular screwdriver Flat cable 33 TK 480 481 34 ADJUSTMENT Test Mode E Test mo
50. NT MIC switch input External microphone input External microphone ground External PTT input Programmable function key input Not use GND DV output Serial data output Serial data input Not use Not use Backlight LED control Backlight LED control LCD power supply Serial data output for LCD driver Serial data input for LCD driver Clock data output for LCD driver LCD driver chip select output 5V GND DISPLAY UNIT X54 3210 XX B 2 SW section Backlight LED control Normally 0V lighting 5V RX LED control Normally 0V lighting 5V TX LED control Normally 0V lighting 5V AUX key output 40 Normally bV MON when connected GND Normally bV LAMP when connected GND Normally 5V transmit when connected GND GND LLLLLLLIT LTL cao vens TK 480 481 DISPLAY UNIT X54 3210 XX 10 K 11 K2 Component side view LLL ITT V Ca Oe N PV sa 1966 Ref No Ref No Address Address Component side pattern 1 Pattern 2 Pattern 3 D307 9N Pattern 4 Foil side Dx9 99 TK 480 481 pc oan tT DISPLAY UNIT X54 3210 XX 10 K 11 K2 Foil side view J 72 0517 22 a J 72 0517 22 Ul CEET e d AJ RS x Ch gt ji a AR 3 E q uiy mb m me E UJ gt lt UJ ZI Y de D 27 2 AJ UJ gt lt 1 IL gt gt E BLAS SVENS u ad Be 23 E E AM OI E K E 3 J D32
51. RONICS U K LIMITED KENWOOD House Dwight Road Watford Herts WD1 8EB United Kingdom KENWOOD ELECTRONICS EUROPE B V Amsterdamseweg 37 1422 AC Uithoorn The Netherlands KENWOOD ELECTRONICS ITALIA S p A Via G Sirtori 7 9 20129 Milano Italy KENWOOD IBERICA S A Bolivia 239 08020 Barcelona Spain KENWOOD ELECTRONICS AUSTRALIA PTY LTD A C N 001 499 074 16 Giffnock Avenue Centrecourt Estate North Ryde N S W 2113 Australia KENWOOD ELECTRONICS HONG KONG LTD Unit 3712 3724 Level 37 Tower one Metroplaza 223 Hing Fong Road Kwai Fong N T Hong Kong KENWOOD ELECTRONICS TECHNOLOGIES S PTE LTD Sales Marketing Division 1 Ang Mo Kio Street 63 Singapore 569110
52. S E E a r E ES Es ES EN EX ES E ES m Jm PIDE KS ES EA E ES ES K ER ES ER i E ES E Es ES KER 5V 5V AUX switch input AFTRD MSK modulation data output timing AFRTM MSK demodulation data input timing E GE ER DIMSTO ES 43 EN EN E Ei ER E EN s e PLLCIK o ES o o o E O o ER o EN ER ES E Fi EX w 5 mak i wax SFTOE LCDCS 47 PLLSTB 48 o RESET S XOUT pA 00 O N 63 70 A7 AO 71 72 MONI N C2 m MONT O Common aa ou m em reme n en Laser m eset O Kersoni rerom 000 S Tou T DTME decode C searen CO ATC wor rwn RSSI Received signal strength indicator input RSSI x T External Serial interface input PELE AFMSKE AFDAT 00 PLL unlock detect input Low speed data input 5V 5V Shift register data strobe output AF IC data strobe output Pin No ne 10 s EZ E 200 Fam e KE KS ss CE E ES LE o 9 UNE EH n vs 79 XN LAN UNE AU m Te i E LN ul LE DNE LR 2 EEN ao La 2 LE 2 E 2 _ ss 2 26 LN 2 gj LE 2 _ 00 2 LE E SS 32 LN 3 X E 94 RX ANN 35 ss 36 PT E 37 RD LAN 38 La 100 1K 480 481 SEMICONDUCTOR DATA Shift Register 1 BU4094BCFV TX RX Unit IC18 Shift Register 2 BU4094BCFV TX RX Unit 1C19 Fortname Function Pinno Port Port
53. SS ay smoys e dsip ay A p ZHAE IN3 ZHAL Ugpzr ndu INY A119911p s Aoid AAOISO IDSO 941 JOOUUOD 04011006 dv au ui Susuuisinsesuu 83641 O SUUAWELY SUJAUJ 8Z iv wgpz 08 Wwadpc 6 90 OLLI COLI 4900 992 SUUIAUIS9Z sulAulLyz UJgp9 6oL V WaPyOclL WaPy 6LL ZHINOS 098 3H LOD oO UgPpeoLrL ugpo70r WaPr OL l ZHINSS v Y Lal 11997 Cdl uonoes XL SUIAWEQT 6919 60 6612 Cl C C a ZME y Arr HE 021 LL UE INV As Ugpo eLr Ugpo 8LL uonoes xu 59 TK 480 481 LEVEL DIAGRAM TK 481 Z L 2 L Tid vLOl 6919 Ld 0912 6712 Sd 612 9812 LELO ow E O2A X ANY A osi lnpouu ZLO LLO LLO OLD MS Z JOMOd uedo ze u do ZLO uedo sq uedo LD uedo 0LD ulgpg ZL Wgpe g ugpry 0 ugpry ugpzoL Ke a ii ZHIN00 668 JH vol Z L EH vol 101106062 Huljdnoo 40000 e asn uono5 s JH 841 ul 120110 s Aoid dooso 5so y J99UU09 uo 1 958s JV y ui slu uu inse ui 83641 O GOW ZHAL 18 eq ZHAS L seuio eq SUJAUJL 9L indu JIN 841 01185 S DY SUJAUIgg SUIIAUIGOL Sul AUulgeL SUJAUIQ G SLUIALUBLE sulAulgee SWJAWEGE SWIAWZ Lt SUJJAUJ 9L _ JN uonoes X L dS 00 2l vol CH CQVNIS g8PzL u e1qo 0 3 899 pauinbaJ anjen indui DSS ay smoys Aejds p aU 119 IdAV I va 40112edeo Buijdnoo dQQQL e esn uonoes JH au ul M009 jv
54. called radio unit It is used as an interval time of retries It must be set greater than the ACK Delay Time of the called radio unit B ACK Delay Time ACK Delay Time is the amount of time from the end of receiving a data to the beginning of sending an acknowledgement It should be adjusted as the repeater s hang up delay time Also it must be set less than the Maxi mum ACK Wait Time of the calling radio unit B TX Delay Time RX Capture TX Delay Time is the amount of unmodulated transmis sion to let the called unit stop scanning or exit its battery save mode It is used only when starting a data communica tion sequence B Data TX Modulation Delay Time Data TX Modulation Delay Time is the amount of time from the beginning of transmission to the beginning of a data modulation It is used every time data is transmitted It must be set to more than 300ms if data communication is made in Trunking Mode 7 Audible User Feedback Tones The transceiver outputs various combinations of tones to notify the user of the transceiver operating state The main tones are listed below The high tone is 1477Hz the mid tone is 941Hz and the low tone is 770Hz 7 1 Power On Tone This tone is output when the transceiver is turned on The high tone is output for 500ms 7 2 Alert Tone This tone is output when the transceiver is TX inhibition for TOT and PLL unlocked It is output until the PTT button Is released The 697Hz tone is output
55. coder TK 480 100Hz adjustment Select FREQ sk knob 815 500MHz in tuning mode TK 481 PTT ON 899 025MHz Maximum 1 SYS GRP 4 gt k Power meter Check 3 0W or more power check Select HPOW 256 in tuning mode Ammeter Panel ANT PTT ON TX high 1 SYS GRP 4 x Panel Encoder 2 5W 0 1W power Select HPOW kk knob 1 7A or less adjustment in tuning mode PTT ON IX T A 1 SYS GRP 4 high power Select THPW sk adjustment in tuning mode PTT ON TX high 1 SYS GRP 1 7 Check 2 0 3 0W power check TA mode OFF and ON Press A key then C key 1 7A or less PTT ON TX low 1 SYS GRP 4 Panel Encoder 0 1W power Select LPW kk knob 1 2A or less adjustment in tuning mode PTT ON IX T A 1 SYS GRP 4 low power Select TLPW adjustment In tuning mode PTT ON TX low 1 SYS GRP KEE Check 0 5 1 5W power check Low power Press B key 1 2A or less TA mode OFF and ON Press A key then C key PTT ON Specifications Remarks 36 9 DOT BAL adjustment 10 MAX DEV adjustment 11 T A MAX DEV adjustment 12 NPSPAC MAX DEV adjustment 13 MIC sensitivity check 14 T A MIC sensitivity check 1K 480 481 ADJUSTMENT Measurement Test quen Unit Terminal Unit Parts Method Power meter Panel ANT Panel Encoder Make the demodu knob lation waves into square waves Universal TK 480 3 8kHz TK 481 1 75kHz
56. connected to indi cate that the user can talk if the clear to talk function has been set The high tone is output for 100ms 7 19 Queue Tone This tone is output until the auto TEL function is set and the TEL channel is accepted successfully The mid tone on for bOms off for BOms and on for 50ms in 1 second inter vals 7 20 Deny Tone This tone is output if the auto TEL function is set the queue tone is output but the TEL channel cannot be ac cessed within 60 seconds 1115 similar to the intercept tone The mid tone and low tone are output alternately in 150ms intervals 7 21 Free System Ringback Mode Tone System Search Mode Tone This tone indicates that the transceiver is free system ringback mode or system search mode The mid tone is output for 400ms 7 22 Ringing Tone This tone indicates that the transceiver can use the re peater in free system ringback mode The mid tone and no tone are output eight cycles alternately in 50ms intervals 7 23 System Search Tone Sounds when the system changes during system search You can select yes or no for the optional feature s warning tone 7 24 System Search End Tone Sounds when a possible connection to a repeater in sys tem search is not mode You can select yes or no for the optional feature s warning tone REALIGNMENT 1 Modes ming mode Panel tuning mode Data program ming mode For normal use Used by the dealer to check the funda User
57. de operating features This transceiver has a test mode To enter test mode press A key and turn power on Hold A key until test channel No and test signalling No appears on LCD lest mode can be inhibited by programming To exit test mode switch the power on again The following functions are avail able in test mode Controls PTT Used when making a Used when making ul D MON Monitor ON and OFF LAMP Lights the lamp for five Unused seconds Lighting is extended for a further five seconds by pressing any key while the lamp is lit S MSK 1200 bps and Sets to the Tuning 2400 bps mode Compander function RF power HIGH and ON and OFF LOW Beat shift ON and OFF Changes group Used as the DIMF Used as the DIMF keypad If a key is keypad If a key is 0 to 9 and x pressed during trans mission the DIMF corresponding to the pressed during trans mission the DIMF corresponding to the key that was pressed key that was pressed is sent keypad model is sent keypad model ENCODER Changes system Changes system Note If a S A B C key is pressed during transmis sion the DIMF corresponding to the key that was pressed is sent e LCD indicator SCN Unused A Lights at Compander ON LO Lights at RF Power Low S Unused MON Lights at moniter ON SVC Unused S IS Lights at MSK 2400 bps e LED indicator Red LED Lights during transmissio
58. e ANT input level ANT input level Fig 5b Squelch and RSSI voltage vs ANT input level 4 Transmitter System 4 1 Microphone amplifier The signal from the internal microphone goes through the mute switch Q300 When the SP MIC is not attached the microphone switching terminal MSW on the universal connector be comes High and mute switch 02300 is turned ON When the SP MIC is attached MSW is connected to GND at inside of SP MIC For this reason Q300 is turned OFF the internal microphone is muted and only the input of the external mi crophone is supplied to the microphone amplifier of the TX RX unit 15 TK 480 481 16 CIRCUIT DESCRIPTION The signal from microphone passes through the limitter circuit in D11 and through the high pass filter the ALC cir cuit the low pass filter the high pass filter and pre empha sis IDC circuit in IC12 When encoding DTMF mute switch Q7 is turned OFF for muting the microphone input signal The signal passes through the D A converter 1C4 for the maximum deviation adjustment and enters the summing amplifier consisting of IC3 2 2 and is mixed with the low speed data from the CPU IC1 5 The output signal from the summing amplifier passes through the D A converter IC4 again for the TA maximum deviation adjustment and the AF switch Q21 is off in TX and goes to the VCO modulation input The other output signal from the summing amplifier passes through the D A co
59. ed B Caller ID Stack The radio stores the last 3 received caller IDs to volatile memory B Caller ID Display PTT ID is displayed on LCD 6 10 Parameters B GTC Count Number of Go To data Channel messages to be sent be fore transmitting a data message if it is being made on Data System Group If a radio unit receives a GTC message it will move to the Data System Group of the current system Increase this item to make sure the called radio unit moves to the Data System Group E Random Access Contention When a channel or all the repeater channels for Trunking mode is busy radio unit will not transmit depending on its Busy Channel Lockout setting in conventional mode As soon as a channel is cleared some transmissions may crash Random access is used to avoid this by employing a random transmission sequence TK 480 481 10 OPERATING FEATURES E Number of Retries Number of Retries is the maximum number of retry transmission when no acknowledgement is received in the Maximum ACK Wait Time Increase this item to improve data communication reliability B TX Busy Wait Time TX Busy Wait Time is the maximum amount of time be fore giving up the data transmission when the channel or all the repeater channels for Trunking mode is busy Also this timer affects if it expires during Random Access period B Maximum ACK Wait Time Maximum ACK Wait Time is the maximum amount of time to wait for an acknowledgement from the
60. erence select Speed up output HER charge pump REFIN Reference divider pe e Integral output charge pump PHI E 2 Auxiliary reference select RA 25 Auxiliary output Auxiliary PHA phase charge pump detector 12 1 4 is 1 E LOCK AUXIN Auxiliary divider VDDA VSSA E Pin description Pin No Symbol Description Serial clock input Serial data input Serial strobe input Digital ground Prescaler positive input 6 D n Prescaler negative input Prescaler positive supply voltage This pin supplies power to the prescaler and RF input buffer 8 REFN Reference divider input 9 RA Auxiliary current setting resistor to VSsA Auxiliary divider input 22 TK 480 481 DESCRIPTION OF COMPONENTS DISPLAY UNIT X54 3210 XX Ct No Uefa Operation Conation Q302 DC switch LED Red driver 0303 DC switch LED Green driver D301 LED LED Red Green D319 321 TX RX UNIT X57 5630 XX Ret No Use Funcion Operation Condition D A converter Adjustment DTMF decoder IC1 IC2 163 IC4 IC5 IC6 IC7 IC8 IC9 o ici2 fic Audioprocesser cu pie NCO system _ Ref No Use Function Operation Condition IC15 IC16 17 IC18 19 1621 Comparator APC o2 os os 010 011 12 013 014 15 016 Q1 018 019 020 021 Buffer amplifier RF amplifier TX driver FET o D9 10 D11 D17 18 Surge absorption 23 TK 480
61. est system number or group number it goes back to lowest system number or group number System numbers or group numbers not set are skipped Caution The FPU KPG 49D allows selecting between system selector and group selector Volume Power switch Transceiver Power and Volume switch Turn clockwise to switch On the transceiver Turn counterclockwise fully to switch OFF the transceiver Also adjusts the volume level When the power is switched off all the param eters such as the system and group are stored in memory When the power is switched on again the sys tem returns to the previous conditions 4 Auxiliary orange key Programmable 5 Battery pack release catch Push down to release the battery pack See Installing the Ni Cd Battery Pack MONITOR key Programmable PTT Push To Talk key Press this key then speak into the microphone to call a station LAMP key Programmable 9 TX BATT indicator This red LED lights during transmission it does not light during busy or when transmit is prohibited If the battery voltage falls below the programmed voltage during trans mission the brightness of this indicator decreases at in tervals of about one second so it can be used as the bat tery voltage alert function S A B and C key Programmable 01 DTMF keypad keypad model only Press the keys on the telephone keypad to send DIMF tones 2 Universal connector Connect the external KMC 2
62. f for each group channel DTMF The contents of ID are programmed for each transceiver The transceiver is capable to have ID The format is DIMF The timing that the transceiver sends ID is program mable BOT Connect ID is sent on beginning of transmission EOT Disconnect ID is sent on end of transmission Both Connect ID is sent on beginning of transmission and disconnect ID is sent on end of transmission There is also PTT ID setting for each channel 1K 480 481 OPERATING FEATURES 4 5 Radio password When the password is set in the transceiver user can not use the transceiver unless enter the correct password This code can be up to 6 digits from 0 to 9 and input with the keypad or selector and S key 4 6 Battery Warning This transceiver has battery warning feature If the low voltage is detected during transmission the transceiver warns it by flashing red LED Then more low voltage is detected during transmission the transceiver stops transmission and warns it by flashing red LED and beep Please notice standard for the battery exchange charging time by flashing red LED and beep 4 7 Minimum Volume The minimum volume is programmable off 0 to 31 The transceiver remains the minimum volume level how ever the mechanical volume position is set to zero 4 8 Call indicator The call indicator can be programmed for each group In trunked system it can be set to respond to a selectable de
63. group was changed while scanning the newly selected system group B Selected Talkback If the system group was changed while scanning the newly selected system group The transceiver talks back on the current receive group 3 6 Scan message wait The time for staying with the home repeater that re ceives a signal during system scan and monitoring data messages can be programmed If there is no signal from the home repeater the system is scanned for about 50ms If there is a signal three data messages are monitored Nor mally three data messages are monitored for each system and it can be increased in multiples of three data messages per line to up to eight lines If the repeater data message indicates that there is no call data monitoring is terminated and the home repeater of the next system Is scanned 3 7 Group scan operation Group scan can be programmed for each group In addi tion to the ID codes of the selected group the ID codes of the other groups that are permitted for group scan are de coded The two fixed ID and block decode codes are always decoded If during group scanning a call is received with one of the selectable group ID codes for which group scan is en abled the group display indicates the group number that the call came in with That group then becomes the new se lected group Group scan resumes after the specified drop out delay time or dwell time shared by the system scan elapses 3 8
64. included Charger and charging time KSC 19 Normal Charger Approx 8 hours KSC 20 Rapid charger Approx 1 3 hour NEE 220g KSC 19 Charging KNB 16A A A 7 2V Battery Capac Scie le D ae kee 1100mAh Charging UME EE Approx 8 hours KNB 17A VOO sussa E 7 2V Battery capacity EE 1500mAh Charging time EE E eee ee ee Approx 8 hours 61 TK 480 481 62 SPECIFICATIONS General Frequency Range np CTI TK 480 851 to 870MHz TK 481 935 to 941MHz jr uec OR PUn TK 480 806 to 825MHz 851 to 870MHz Talk Around TK 481 896 to 902MHz 935 to 941MHz Talk Around SU IP ee uz ae RI NIN NP LR Maximum 32 GIO DS T de oa a a ua Maximum 250 Conventional Channels sssini Maximum 600 Channel Spaelrg WEE TK 480 25kHz PLL channel step 12 5kHz TK 481 12 5kHz PLL channel step 12 5kHz Baten VO Oe degt aa G DC 7 5V Baten EE More than 8 hours at 5 5 90 duty cycle with KNB 16A battery Temperature Range 30 C to 60 C 22 F to 140 F Dimensions and Weight With KNB 16A 1100mAh battery 135 5 33 H x 58 2 29 W x 34 1 34 D mm inch 1 01lbs 4609 Dimensions not including protrusions weight includes antenna and belt hook Receiver Measurements made per TIA EIA 603 PF Input re lee 500 Sensitivity 1208 ee 0 30uV Selec UV TK 480 70dB 25kHz TK 481 63dB 12 5kHz Ha Ei isa ere 10 UL OTI r Vc ERE SERIA VUE OR EDEN T TK 480 65dB 25 50kHz
65. io mute circuit by decode data in put 6 Transmitting tone and encode data 6 1 Memory circuit Memory circuit consists of the CPU IC15 and a flash memory IC17 a flash memory has a capacity of 2M bits that contains the transceiver control program for the CPU and data such as transceiver channels and operating fea tures This program can be easily written from an external de vices The data such as operating status is programmed into the EEPROM 1016 e Flash Memory Note The flash memory holds data such as written with the FPU KPG 49D firmware program User mode Test mode Tuning mode etc This data must be rewritten when replacing the flash memory e EEPROM Note The EEPROM stores tuning data Deviation Squelch etc Realign the transceiver after replacing the EEPROM IC15 IC16 EEPROM 1017 Fig 9 Memory circuit 17 TK 480 481 18 CIRCUIT DESCRIPTION 6 2 Low battery warning The battery voltage is monitored by the Microprocessor IC15 When the battery voltage falls below the voltage set by the Low Battery Warning adjustment the red LED flashes to notify the operator that it is time to replace the battery If the battery voltage falls even More approx 5 8V a beep sounds and transmission is stopped Low battery warning Battery condition The red LED flashes during The battery voltage is low but transmission the transceiver is still usable The red LED flashes and continuo
66. key keypad K2 type B Group up down When the key is pressed each time the group number to be selected is incremented decremented and repeats if held for one second or longer E Home group Each pressing of the key selects a preset system group B Key lock Pressing this key causes the transceiver to accept entry of only the Function Key Lock PTT Lamp Monitor Al Monitor B Monitor C Monitor D and Emergency keys The locked keys also include the tuning control B Lamp This key illuminates the LCD and keys on the front panel When the key is pressed the LED lamp goes on When it is released the lamp goes off after about five seconds If any key is pressed while the LED lamp is on the lamp is kept on for five seconds B Memory This key allows DIMF memory data to be recalled up to 32 memories each with a memory dial of up to 16 digits and an A N of up to 10 digits per memory B Monitor Used to release signalling or squelch when operating as a conventional It is also used to reset option signalling B Redial Pressing this key when System Group is shown displays the previously transmitted DTMF code Pressing PTT at this time transmits the code that is currently displayed B RF power low Used to temporarily switch transmission output to low power Turning the function on enables Hi gt Low Low Low Key states are backed up except in the PC mode when they are reset B Scan Press this key sta
67. lso displays various functions such as TA P Priority indicator The P indicator appears when a selected channel is programmed as priority in conventional operation 3 MON Monitor indicator The MON indicator appears when the button pro grammed as MONITOR is pressed 4 SVC Service indicator This icon is not used on this transceiver SCN Scan indicator The SCN indicator appears when using Scan mode LO indicator Appears when low power is selected C Handset indicator The handset indicator J appears when the selected group is programmed as telephone IDs MAIL indicator Flashes when a status message FleetSync is re ceived Lights when a status message is stored in the stack memory 9 Alphanumeric display The twelve character dot matrix alphanumeric display shows the system and group numbers You can program system and group names with up to ten characters in place of these numbers The left display is used as a de lete indicator p and the right is used for the selective call 4 or scrambler _ function The delete add indica tor shows the systems locked out of the scanning se quence Selective call and scrambler are optional func tions that can be programmed 3 Scan Operating 3 1 System scan System scan can be selected with the Scan key by pro gramming the scan feature When the Scan key is pressed and the SCN mark appears scan mode in en tered Scanning starts fr
68. mame Fee 01 AM1 Audio mute 1 H Unmute L Mute TA SO PISA NES gt A Al DIU O NO Link complete Programmable active H L Talk around H Off L On O CO eo S INNEN DIMPD DIMF decode IC power down H Power down L Busy K lt LO WN NC GND NC co NC External squelch Programmable active H L CODE2 Option board data 2 CODE1 Option board data 1 OPT Option board control O O1 O O O O1 N CA Please set option board type in the KPG 49D H On L Off Auxiliary signal outut Please set key function in the KPG 49D Program O Output enable lt U O REI ES K i Ls os mable active H L VCO System KCH31 KCH32 TX RX Unit IC14 B Circuit diagram C16 z O U lt Q Q G 4 STE gt D1 2 C13 Q D2 L2 gt D3 CA d TI O R 7 e O C17 o C O z C D _ gt C3 e C6 C C14 al O Q1 25K1824 D1 HVC350B Q2 25C4226 R25 D2 HVC202A 03 2SC5008 D3 MA2S077 21 TK 480 481 SEMICONDUCTOR DATA PLL System SA7025DK TX RX Unit IC11 B Block diagram CLOCK DATA Serial input Program latches STROBE NM2 PR NM NM3 RFIN 64 65 72 pi a oa Fractional Prescaler REIN 42 Mamsdividers accumulator modulus control TEST RF Main phase Normal output detector charge pump Main VccP ref
69. mode Panel test mode mental characteristics Panel tuning mode Used by the dealer to tune the radio PC mode Used for communication between the radio and PC IBM compatible Data program Used to read and write frequency data ming mode 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 main program Clone mode Used to transfer programming data from llli a 2 How to Enter Each Mode User mode Panel test mode PC mode Panel tuning mode Firmware programming mode S Power ON Two seconds C Power ON Two seconds Clone mode 3 Panel Test Mode setting method refer to ADJUSTMENT 4 Panel Tuning Mode setting method refer to ADJUSTMENT 11 TK 480 481 12 REALIGNMENT 5 PC Mode 5 1 Preface The TK 480 481 transceiver is programmed by using a personal computer programming interface KPG 36 and programming software KPG 49D The programming software can be used with an IBM PC or compatible Figure 1 shows the setup of an IBM PC for programming 5 2 Connection procedure 1 Connect the TK 480 481 to the personal computer with the interface cable 2 When the POWER switch on user mode can be entered immediately When PC sends command the radio enter PC mode and PROGRAM is displayed on the LCD When data transmitting from transceiver the red LED is
70. n Blinks at the low battery voltage warning Green LED Lights when there is a carrier e Sub LCD indicator FCN Appears at Function ON E Frequency and signalling The set has been adjusted for the frequencies shown in the following table When required re adjust them following the adjustment procedure to obtain the frequencies you want in actual operation Frequency MHz TK 480 TK 481 SYS No RX TX TA RX TX TA 896 0500 1 935 0250 7 940 9000 10 936 7500 Signalling 896 0250 X Ww s s EN BE ETE T gt O O E O zZ O None None Single tone 1200Hz 15 MSK code Preparations for tuning the transceiver Before attempting to tune the transceiver connect the unit to a suitable power supply Whenever the transmitter is turned the unit must be connected to a suitable dummy load i e power meter The speaker output connector must be terminated with a 160 dummy load and connected to an AC voltmeter and an audio distortion meter or a SINAD measurement meter at all times during tuning D None 100Hz square LTR data OT 67 0Hz OT 151 4Hz OT 210 7Hz OT 250 3Hz DOT D023N DOT D754l DTMF DEC 159D DIMF tone 9 RX 1 SS 1 7 10 1 3 1 ADJUSTMENT e Transceiver tuning To place transceiver in tuning mode System appears on LCD Set system according to tuning requirements LCD display Test mode Tu u 1
71. nd goes to the VCO and VCXO The RX DTMF tone is passed a summing amplifier IC3 2 2 the D A convertor IC4 for audio control audio power amplifier and then to the speaker e MSK MSK signal is output from pin 6 of IC12 The signal passes through the D A converter ICA for the MSK devia tion adjustment and is routed to the VCO When encoding MSK the microphone input signal is muted RX audio Fig 12 Encode 1K 480 481 CIRCUIT DESCRIPTION 7 2 Decode Low speed data OT DOT LTR The demodulated signal from the IF IC IC9 is amplified by IC8 1 2 and passes through a low pass filter IC10 to remove audio components The signal is input to pin 23 of the CPU The CPU digitizes this signal performs processing such as DC restoration and decodes the signal High speed data DTMF The DTMF input signal from the IF IC is amplified by IC8 1 2 and goes to IC13 the DTMF decoder The decoded in formation is then processed by the CPU During transmis sion and standby the DTMF IC is set to the power down mode when the PD terminal is High When the line is busy the PD terminal becomes Low the power down mode is canceled and decoding Is carried out e MSK The MSK input signal from the IF IC is amplified by IC8 1 2 and goes to pin 5 of IC12 The signal is demodulated by MSK demodulator in 1012 The demodulated data goes to the CPU for processing 23 LSD IC10 LPF IN IC15 IC13 SS DTMF DECODE
72. ni versal connectors on the master and slave 6 Press the S key on the master while the master displays CLONE MODE The data of the master is sent to the slave While the slave is receiving the data PROGRAM is displayed When cloning of data is completed the mas ter displays END and the slave automatically operates in the User mode The slave can then be operated by the same program as the master 7 he other slave can be continuously cloned When the S key on the master is pressed while the master displays END the master displays CLONE MODE Carry out the operation in step 4 to 6 Note Only the same models can be cloned together Cloning cable E30 3325 05 Fig 2 13 TK 480 481 14 CIRCUIT DESCRIPTION 1 Overview This transceiver is an 800 900MHz band EFJ LTR trunked system compatible FM portable transceiver that can be programmed to operate on both LIR and conventional systems 2 Circuit Configuration by Frequency The receiver is a double conversion superheterodyne with a first intermediate frequency IF of 44 85MHz and a second IF of 455kHz Incoming signals from the antenna are mixed with the local signal from the PLL to produce the first IF of 44 85MHz This is then mixed with the 44 395MHz second local os cillator output to produce the 455kHz second IF This is de tected to give the demodulated signal The transmit signal frequency is generated by the PLL
73. nverter ICA again for the BAL adjustment and the buffer amplifier IC1 2 2 and goes to the VCXO modulation input EXT MIC O Q7 IC12 15 16 118 19 8 MIC Q300 D11 mO E Ge QQ 1 16 COMP PRE EMP Q I IC4 D A 15 Ob N O301 MSW LSD 4 2 Drive and Final amplifier The signal from the T R switch D5 is on is amplified by the pre drive O11 and drive amplifier 012 to 50mW The output of the drive amplifier is amplified by the RF power amplifier IC30 to 2 5W 1W when the power is low The RF power amplifier consists of two stages MOS FET transistor The output of the RF power amplifier is then passed through the harmonic filter LPF and antenna switch D7 is on and applied to the antenna terminal 4 3 APC circuit The APC circuit always monitors the current flowing through the RF power amplifier IC30 and keeps a constant current The voltage drop at R127 R128 and R129 is caused by the current flowing through the RF power amplifier and this voltage is applied to the differential amplifier IC21 1 2 1021 2 2 compares the output voltage of IC21 1 2 with the reference voltage from 104 and the output of IC21 2 2 controls the VGG of the RF power amplifier to make the both voltages to same voltage The change of power high low is carried out by the change of the reference voltage O14 15 and 18 are turned on in transmit and the APC circuit is active MUTE DTMF 103 2 2 104 Q2
74. om the system following the cur rently displayed system When a call is received scanning stops and the system and group are displayed When the system knob or programming key is touched during scanning the scan stops and the revert system or group can be changed Scanning resumes one second after the key is released oystem scan consists of the following 2 types E Fix system scan All the set systems except locked out ones are scanned If the DEL ADD feature is assigned to the programmable key it can be controlled from the front panel B List type system scan A scan list can be set for each system The list to be scanned can be changed by changing the display system If many system have been set the scan speed can be increased by narrowing the systems to be scanned with scan lists 3 2 System lockout The system lockout feature is used to lock systems out of the scan sequence and can be selected by programming in the following two ways B Fixed lockout The system to be locked out is selected by programming When a locked system is selected the Delete p indicator appears on the left of the SYSTEM indicator The revert sys tem is scanned even if it is locked out If there is a locked system the Delete indicator flashes during fixed scan ning Bl User selectable lockout If the scan lockout feature is programmed to a key the user can lock systems out of the scan sequence with the key To lock a system out of
75. or less DOHz to 10kHz 1mV to 10V 50Hz to 5kHz or more 0 to 1V 396 or less at 1kHz 50mV to 10Vrms 10mV to 10V DC or less 50kQ Y or greater 12 160 Dummy Load Approx 160 3W 13 Regulated Power Supply B The following parts are required for adjustment 1 Antenna connector adapter The antenna connector of this radio uses an SMA termi nal Use an antenna connector adapter SMA f BNC f or SMA f N f for adjustment The adapter is not provided as an option so buy a commercially available one Note When the antenna connector adapter touches the knob draw out the knob to mount the connector 2 Universal connector Use the interface cable KPG 36 for PC tuning or the lead wire with plug E30 3287 18 and screw N08 0535 08 for panel tuning Connct the plug to the universal connector of the radio and tighten the screw The lead wire with plug E30 3287 18 and screw NO8 0535 08 terminals are as follows Numbers are universal connector terminal numbers 5V to 10V approx BA Useful if ammeter requipped Caution 1 When connecting the plug to the universal connector of the radio a short circuit may occur To prevent this be sure to turn the radio POWER switch off 2 Since the RX AF output is a BTL output there is a DC component Isolate this with a capacitor or transformer as shown in the figure 3 Do not connct an instrument between red or black and GND e Universal connector O
76. peat steps 5 to 8 DN 1K 480 481 REALIGNMENT Notes e To start the Firmware Programmer from KPG 49D the Fpro path must be set up by KPG 49D Setup e This mode cannot be entered if the Firmware Program ming mode is set to Disable in the Programming soft ware KPG 49D e When programming the firmware it is recommend to copy the data from the floppy disk to your hard disk be fore update the radio firmware Directry copying from the floppy disk to the radio may not work because the access speed is too slow 6 4 Function 1 If you press the MON switch top of left side while PROG 57600 is displayed the checksum is displayed If you press the MON switch again while the checksum is displayed PROG 57600 is redisplayed 2 If you press the LAMP switch bottom of left side while PROG 57600 is displayed the display changes to PROG 19200 to indicate that the write speed is low speed 19200 bps If you press the LAMP switch again while PROG 19200 is displayed the display changes to PROG 38400 and the write speed becomes the middle speed mode 38400 bps If you press the LAMP switch again while PROG 38400 is displayed the dis play returns to PROG 57600 Note Normally write in the high speed mode 7 Clone Mode Programming data can be transferred from one radio to another by connecting them via their external universal con nectors The operation is as follows the transmi
77. rts scanning Pressing this key stops scanning B Scan Del Add Used to select whether system scan routines are used during system scan Each pressing of the key to ON toggles between lockout and lock The scan routine is started when on lock The DEL indicator flashes when the system is on lockout B Scan temporary delete This key is temporarily deleted a system being scanned If you press this key when scan is stopped when a call is being received from another station the system is tempo rarily deleted and scanning restarts This key operates even when Scan Type is set to List Type System Scan B Scrambler If a scrambler code 1 to 4 has been set in the FPU an underscore appears at the extreme right of the LCD display when scrambler is active Pressing this key changes ON OFF of scramble operation Holding this key down for 2 seconds sets Scramble Code Select Mode 1K 480 481 OPERATING FEATURES E System up down When the key is pressed each time the system number to be selected is incremented decremented and repeats if held for one second or longer B Telephone disconnect Pressing this key ends an RIC connection disconnects the telephone line BH None Sounds error operation beep and no action will occur Use this function when the transceiver is required to be more simple operated 2 4 Display JODE mon sve stn Lo J M UU Sub display Displays the system channel and group numbers A
78. t Display unit B 2 When you repair or exchange 34 the square socket 19 please A exchange FPC 34 as well 3 SK 701 Chassis Y i 19 wi 30 Parts with the exploded numbers larger than 700 are not supplied TK 480 481 PACKING D 4 32 Hook J29 0658 05 50 Battery assy W09 0900 35 7 Warranty card B46 0470 00 9 Instruction manual i B62 1483 00 Cap SP MIC B09 0363 03 28 Packing fixture H12 3014 02 47 Whip antenna T90 0636 25 TK 480 T90 0640 25 TK 481 29 Item carton case H52 1096 12 TK 480 H52 1097 12 TK 481 31 TK 480 481 ADJUSTMENT Test Equipment Required for Alignment 1 Standard Signal Generator Frequency Range 800 to 950MHz SSG Modulation Frequency modulation and external modulation Output 0 1uV to greater than 1mV Input Impedance 500 Operation Frequency 800 to 950MHz or more Measurement Capability Vicinity of 10W Frequency Range 300 to 960M 4 Digital Volt Meter Measuring Range 10mV to 10V DC DVM Input Impedance High input impedance for minimum circuit loading 2 Power Meter 5 Oscilloscope DC through 30MHz 32 Frequency Range Frequency Stability 6 High Sensitivity Frequency Counter 8 AF Volt Meter AF VTVM 9 Audio Generator AG 10 Distortion Meter 11 Voltmeter Frequency Range Voltage Range Frequency Range Output Capability Input Level Measuring Range Input Impedance 10Hz to 1000MHz 0 2ppm
79. t radio is the master and the receive radio is a slave 1 Turn the master TK 480 481 power ON with the C key held down If the password is set to the TK 480 481 the TK 480 481 displays CLONE LOCK If the password is not set the TK 480 481 displays CLONE MODE 2 When CLONE LOCK is displayed only the knob en coder and S and 0 to 9 keys can be accepted When you enter the correct password and CLONE MODE is displayed the TK 480 481 can be used as the cloning master The following describes how to enter the pass word 3 How to enter the password with the keypad If you press a key while CLONE LOCK is displayed The number that was pressed is displayed on the TK 480 481 Each press of the key shifts the display in order to the left When you enter the password and press the S key CLONE MODE is displayed if the entered pass word is correct If the password is incorrect CLONE LOCK is redisplayed How to enter the password with the encoder If the encoder is rotated while CLONE LOCK is dis played numbers 0 to 9 are displayed flashing When you press the S key the currently selected number is determined If you press the S key after entering the password in this procedure CLONE MODE is dis played if the entered password is correct If the pass word is incorrect CLONE LOCK is redisplayed 4 Power on the slave TK 480 481 5 Connect the cloning cable No E30 3325 05 to the u
80. to data from microproces sor and the AF signal is muted When the audio is output AM becomes High to turn Q304 Q305 ON and voltage is supplied to power terminal VP of IC300 Also IC12 is can celed out of the power down mode The speaker is switched by the logic of speaker switch ing terminal SSW on the universal connector When SP MIC is not attached the logic of SSW becomes High and SW Q310 is turned ON and the AF signal is input to both ampli fiers of IC300 When SP MIC is attached SSW is connected to GND at inside of SP MIC For this reason Q310 is turned OFF and the AF signal is input only to amplifier for EXT SP of IC300 Change of INT EXT SP refer to Fig 3 CAM sew ver vez ee w afa e wfe fe n 66 TET r CT Fig 3 Audio amplifier circuit 3 4 Squelch circuit The output from IC9 enters FM IC again then passed through a band pass filter The noise component output from IC9 is amplified by Q19 and rectified by D3 to produce a DC voltage corresponding to the noise level The DC volt age is sent to the analog port of the CPU IC15 And IC9 outputs a DC voltage RSSI corresponding to the input of the IF amplifier The CPU reads the RSSI signal via pin 24 IC15 determines whether to output sounds from the speaker by comparing the input voltage of pin 28 and pin 24 with the preset value IC9 FM IF IC Fig 4 Squelch circuit SO voltage RSSI voltage SO close Preset AEN T SQ open valu
81. ts to access other systems that have a dis patch ID programmed in the revert group location If there is no system to be accessed an intercept tone sounds the mode is terminated and the transceiver returns to the first system If the access is successful the mode is terminated and the searched system becomes the new se lected system If during scanning the scan stops 4 11 Transpond This feature can be programmed to turn on and off for each group If the ID of the group for which transpond is enabled is received two data messages transmit ID and turn off code are automatically transmitted if the PTT but ton is not pressed as a response within the time set 0 to 300 seconds in 1 second increments If the PTT button is pressed within the time the transpond is not preformed 4 12 Transmit inhibit The transceiver can be programmed with a transmit in hibit block of ID codes If an ID code within this block is de coded the preset time before the PTT button is pressed transmission is inhibited The BUSY indicator lights and a busy tone sounds until the PTT button is released to indicate that transmission is not possible except clear to talk mode Transmission with the group for which the encode ID is not set is inhibited and the busy tone is output while the PTT button is held down regardless of the clear to talk set ting 4 13 Auto TEL A telephone interconnect call can be made by simply pressing the key by assigning
82. us beep sounds The battery voltage is low and the transceiver is not usable to while PTT pressed make calls 6 3 Key input If the clock is supplied to CLK terminal when the RES terminal CPU pin 53 of the decade counter IC301 is set to Low 00 to Q7 become High sequentially Normally KIT and KI2 are Low pulled down When any key is pressed Kl1 or KI2 become High The CPU detects which key is pressed according to the voltage of KI1 and KI2 and clock timing 16 keys Fig 10 Key input RESET CLOCK CLOCK INHIBIT d 01 a TF S DEE ze N sat neas i Sp mE E 2 Ed II OUT Fig 11 Decade counter timing chart 7 Signalling Circuit 7 1 Encode Low speed data OT DOT LTR Low speed data is output from pin 36 of the CPU The signal passes through a low pass CR filter and goes to the summing amplifier IC3 1 2 The signal is mixed with the audio signal and goes to the VCO IC14 and VCXO X2 modulation input after passing through the D A converter ICA for BAL adjustment High speed data DTMF High speed data is output from pin 35 of the CPU The signal passes through a low pass filter consisting of 1C23 and provides a TX DIMF tone and a RX DIMF tone including a beep tone The IX DIMF tone is passed to the D A con vertor IC4 for DTMF deviation adjustment and then ap plied to the audio processor IC12 The signal is mixed with the audio signal a
83. uture use 88 lerminates to emergency mode 89 Request for hornalert For Mobile 90 Remote stun on Disable the received radio unit s TX 91 Remote stun on Disable the received radio unit s TX RX 92 Cancel remote stun Enable the received radio unit s TX RX 93 Acknowledgement status sent when the radio unit is in stun mode TX disabled 94 Acknowledgement status sent when the radio unit is in stun mode TX RX disabled 95 97 Reserved for future use 98 Man Down Emergency status 99 Emergency Status Note Remote stun works with DIMF D B D function also E Automatic Status Response If you pre select a status number and leave the radio in the Status Mode it can automatically respond with the se lected status number upon request from the base station The request function is initiated by serial control on the base station Optional 6 6 Short Message Optional A maximum of 48 characters can be sent External equip ment is required Received Short Messages will be dis played in the same manner as a Status Message A maxi mum of 4 received messages can be stored in the stack memory In the Stack Mode 3 digit LCD indicates the re ceived Short Message as M01 M04 6 7 Long Message Optional A maximum of 1024 characters can be sent External equipment is required Received Long Message will not be displayed or stacked in the radio memory but is output through the COM Data port

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