Kenwood FM Transceiver TK-481 manual

Docum ent Cop yrig hts Cop yrigh t 2006 by K e nw ood Corpo ra tio n. A ll rig hts r es erved . No part of th is ma nu al ma y be rep roduced, tr ansla ted, d istribu ted, o r trans mitted i n any fo rm or b y an y mea ns, electr onic, mech anical, p hotocop ying, r ec ord ing , or othe r wise , for an y purpose w ithout t he prio r written pe rmis[...]

© 2001-3 PRINTED IN JAPAN B51-8408-20 ( N ) 1015 800MHz/900MHz FM TRANSCEIVER TK - 480/48 1 SER VICE MANUAL GENERAL ............................................................ 2 SYSTEM SET-UP ................................................ 2 OPERATING FEATURES .................................... 3 REALIGNMENT ...................................[...]

2 T K - 480/48 1 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 af[...]

3 T K - 480/48 1 OPERA TING FEA TURES 1. Operation Features The TK-480/481 is an 800/900MHz band EFJ LTR™-com- patible trunked radio designed to operate in both trunked and conventional modes. The programmable features are summarized. Model Trunking mode Conventional mode This model can handle up to 32 systems with up to 250 groups in each system[...]

4 T K - 480/48 1 OPERA TING FEA TURES ■ 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 avail[...]

5 T K - 480/48 1 OPERA TING FEA TURES ■ 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. ■ Telephone disconnect Pressing this key ends an RIC connection (disconnects the telephone line). ■ None Sounds error operation beep, and no action [...]

6 T K - 480/48 1 OPERA TING FEA TURES To unlock a system, select the system and press the key. The Delete ( ) 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 ( ) indicator flashes during fixed scanning. If all systems ar[...]

7 T K - 480/48 1 OPERA TING FEA TURES 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 v[...]

8 T K - 480/48 1 OPERA TING FEA TURES 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 whic[...]

9 T K - 480/48 1 ■ 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 future use. 88 : Terminates to emergency mode. 89 : Request for hornalert (For [...]

10 T K - 480/48 1 ■ 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. ■ TX Busy Wait Time TX Busy Wait Time is the maximum amount of time be- fore giving up the data transmission when the [...]

11 T K - 480/48 1 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. (The mid tone and low tone are output alternately in 200ms in[...]

12 T K - 480/48 1 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[...]

13 T K - 480/48 1 REALIGNMENT Cloning cable (E30-3325-05) Fig. 2 Notes: • To start the Firmware Programmer from KPG-49D, the Fpro path must be set up by KPG-49D Setup. • This mode cannot be entered if the Firmware Program- ming mode is set to Disable in the Programming soft- ware (KPG-49D). • When programming the firmware, it is recommend to [...]

14 T K - 480/48 1 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 LTR 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[...]

15 T K - 480/48 1 CIRCUIT DESCRIPTION 3-3. Audio amplifier circuit The demodulated signal from IC9 is amplified by IC8 (2/ 2), high-pass filtered, low-pass filtered, high-pass filtered, band-eliminate filtered,and de-emphasized by IC12. The signal then goes through an AF amplifier IC3 (2/2), an electronic volume control (IC4), and an AF switch (Q31[...]

16 T K - 480/48 1 CIRCUIT DESCRIPTION Fig. 6 Microphone amplifier Fig. 7 Drive and final amplifier and APC circuit HPF ALC COMP LPF HPF 15 16 18 SW 19 DTMF 98 IC12 12 LIMIT MIC SW MIC EXT . MIC Q300 D11 6 I5 O5 D/A IC4 SUM AMP IC3 (2/2) I2 O2 D/A IC4 AF MUTE 5R Q21 I1 O1 D/A IC4 BUFF AMP IC1 IC14 VCO X2 VCXO Q301 MSW PRE EMP IDC LSD MUTE Q7 Pre-DRI[...]

17 T K - 480/48 1 CIRCUIT DESCRIPTION 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)[...]

18 T K - 480/48 1 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[...]

19 T K - 480/48 1 CIRCUIT DESCRIPTION 7-2. Decode • Low-speed data (QT,DQT,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 decod[...]

20 T K - 480/48 1 SEMICONDUCTOR DA T A ■ Pin function Pin No. Port name I/O Function 1 LSDOUT O Low speed data output. 2 HSDOUT O High speed data output. 3 HSDIN I Not used. 4 DTMSTD I DTMF decode IC data detect input. 5 SELF I Not used. 6 BYTE I +5V. 7 CNVSS I GND. 8 SFTOE O Shift register output enable. 9 LCDCS O LCD driver chip select output. [...]

21 T K - 480/48 1 Shift Register 1 : BU4094BCFV (TX-RX U nit IC18) Pin No. Port Port name Function 1 STRB ES Strobe 2 DATA DAT Data 3 CLK CK Clock 4 Q1 LEDR Red LED. H : On , L : Off 5 Q2 LEDG Green LED. H : On, L : Off 6 Q3 KEYBLT Key backlight. H : On, L : Off 7 Q4 MMUTE MIC mute. H : Unmute, L : Mute 8 VSS GND. 9 QS IC18 data output. 10 Q’S NC[...]

22 T K - 480/48 1 SEMICONDUCTOR DA T A PLL System : SA7025DK (TX-RX Unit IC11) ■ Block diagram ■ Pin description Pin No. Symbol Description 1 CLOCK Serial clock input. 2 DATA Serial data input. 3 STROBE Serial strobe input. 4V SS Digital ground. 5R F IN Prescaler positive input. 6R F IN Prescaler negative input. 7V CCP Prescaler positive supply[...]

23 T K - 480/48 1 DESCRIPTION OF COMPONENTS DISPLAY UNIT (X54-3210-XX) Ref. No. Use/ Function Operation/Condition IC300 IC Audio power amplifier IC301 IC Counter / Key scan Q300 FET DC switch / INT MIC on/off Q301 FET DC switch Q302 Transistor DC switch / LED (Red) driver Q303 Transistor DC switch / LED (Green) driver Q304 Transistor DC switch Q305[...]

TK - 480/48 1 PA R T S L I S T 24 A : TK-480 (K,K2) B : TK-481 (K,K2) ✽ New Parts. 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. L : Scandinavia K : USA P : Canada Y : PX (Far East, Hawaii) T : England [...]

TK - 480/48 1 P ARTS LIST 25 A : TK-480 (K,K2) B : TK-481 (K,K2) R300 RK73GB1J103J CHIP R 10K J 1/16W R301 RK73FB2A101J CHIP R 100 J 1/10W R302 RK73GB1J470J CHIP R 47 J 1/16W R303 RK73GB1J471J CHIP R 470 J 1/16W R304 RK73GB1J182J CHIP R 1.8K J 1/16W R305 RK73GB1J104J CHIP R 100K J 1/16W R306 R92-1252-05 CHIP R 0 OHM R307 RK73GB1J821J CHIP R 820 J 1[...]

TK - 480/48 1 PA R T S L I S T 26 A : TK-480 (K,K2) B : TK-481 (K,K2) C74 CK73GB1C104K CHIP C 0.10UF K C75 CK73GB1C333K CHIP C 0.033UF K C76 CK73GB1C104K CHIP C 0.10UF K C77 CK73GB1H562J CHIP C 5600PF J C78 CK73GB1E103K CHIP C 0.010UF K C79 CC73GCH1H121J CHIP C 120PF J C80 CK73GB1C683K CHIP C 0.068UF K C81 CC73GCH1H101J CHIP C 100PF J C82,83 CK73GB[...]

TK - 480/48 1 P ARTS LIST 27 A : TK-480 (K,K2) B : TK-481 (K,K2) CN3 E40-5890-05 FLAT CABLE CONNECTOR (24P) CN4-9 E23-1002-05 TERMINAL CN10 E23-0342-05 TEST TERMINAL CN11,12 E23-1002-05 TERMINAL F1 F53-0130-05 FUSE (3A) F1 F53-0217-05 FUSE (3A) CD1 L79-1072-05 TUNING COIL CF1,2 L72-0924-05 CERAMIC FILTER (455KHZ) A-K,K2 CF1,2 L72-0939-05 CERAMIC FI[...]

TK - 480/48 1 PA R T S L I S T 28 A : TK-480 (K,K2) B : TK-481 (K,K2) R55 RN73GH1J913D CHIP R 91K D 1/16W R56 RK73GB1J223J CHIP R 22K J 1/16W R57 RK73GB1J334J CHIP R 330K J 1/16W R58 RN73GH1J682D CHIP R 6.8K D 1/16W R59 RK73GB1J154J CHIP R 150K J 1/16W R60 RK73GB1J101J CHIP R 100 J 1/16W R61 RK73GB1J155J CHIP R 1.5M J 1/16W R62 RK73GB1J101J CHIP R [...]

TK - 480/48 1 P ARTS LIST 29 A : TK-480 (K,K2) B : TK-481 (K,K2) R419-422 R92-1252-05 CHIP R 0 OHM R423 RK73GB1J473J CHIP R 47K J 1/16W D1 1SR154-400 DIODE D2 MA2S111 DIODE D3 MA742 DIODE D4,5 MA2S077 DIODE D6 ✽ UDZS4.7B ZENER DIODE D7 HVU131 DIODE D8 MA2S111 DIODE D9,10 MA2S077 DIODE D11 MA742 DIODE D12 MA2S111 DIODE B-K,K2 D17,18 DA221 DIODE IC[...]

30 T K - 480/4 8 1 EXPLODED VIEW A B 1 2 3 A : N14-0569-04 B M2.6 x 5 : N30-2605-46 C M2.6 x 10 : N30-2610-46 D M2.6 x 6 : N67-2606-46 E M2 x 5 : N83-2005-46 F M2 x 2.5 : N79-2025-46 37 36 23 38 39 6 1 62 57 5 16 68 55 54 15 33 56 63 63 51 51 52 64 64 66 10 61 12 65 49 44 2 26 34 24 17 19 40 31 25 MIC300 46 18 22x2 21x2 A C C A Ex2 Display unit (A/[...]

31 T K - 480/4 8 1 P ACKING C D 1 2 3 50 Battery assy (W09-0900-35) Insulation sheet 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 7 Warranty card (B46-0470-00) 9 Instruction manual (B62-1483-00) 4 Cap (SP/MIC) (B09-0363-03) 42 Screw s[...]

32 T K - 480/4 8 1 ADJUSTMENT Test Equipment Required for Alignment Test Equipment Major Specifications 1. Standard Signal Generator Frequency Range 800 to 950MHz (SSG) Modulation Frequency modulation and external modulation Output 0.1 µ V to greater than 1mV 2. Power Meter Input Impedance 50 Ω Operation Frequency 800 to 950MHz or more Measureme[...]

33 T K - 480/4 8 1 ADJUSTMENT 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. How to Remove the Flat Cable 1. Gently draw out both sides of the connector lever uni- formly [...]

34 T K - 480/4 8 1 ADJUSTMENT Test Mode ■ Test mode 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. Test mode can be inhibited by programming. To exit test mode, switch the power on again. The following functions a[...]

35 T K - 480/4 8 1 ■ Tuning mode ADJUSTMENT FR E Q 1 Adjustment (1~256) Adjustment item Panel test mode System/Group No. FREQ : Frequency adj. HPOW : High power THPW : High power (T/A) LPW : Low power TLPW : Low power (T/A) BAL : DQT balance MAX : Max deviation L MAX TMAX : Max deviation (T/A) FQT : Fine QT FDQT : Fine DQT FL TR : L TR DTMF : DTM[...]

ADJUSTMENT Measurement Test- equipment Unit Terminal Adjustment Unit Parts Method Specifications/Remarks Condition Item 36 T K - 480/4 8 1 1. Frequency 1) SYS – GRP : 4 – ✽ f. counter Panel ANT Panel Encoder TK-480 ± 100Hz adjustment Select FREQ ✽ ✽ ✽ knob : 815.500MHz in tuning mode. TK-481 PTT : ON : 899.025MHz 2. Maximum 1) SYS – [...]

37 ADJUSTMENT Measurement Test- equipment Unit Terminal Adjustment Unit Parts Method Specifications/Remarks Condition Item T K - 480/4 8 1 9. DQT BAL 1) SYS – GRP : 4 – ✽ Power meter Panel ANT Panel Encoder Make the demodu- adjustment Select BAL ✽ ✽ ✽ Deviation knob lation waves into in tuning mode. meter square waves. Deviation meter f[...]

ADJUSTMENT Measurement Test- equipment Unit Terminal Adjustment Unit Parts Method Specifications/Remarks Condition Item 38 T K - 480/4 8 1 15. QT DEV 1) SYS – GRP : 4 – ✽ Power meter Panel ANT Panel Encoder TK-480 : 0.75kHz ± 0.05kHz adjustment MIC input : OFF Deviation knob TK-481 : 0.45kHz Select FQT ✽ ✽ ✽ meter in tuning mode. Oscil[...]

39 ADJUSTMENT Measurement Test- equipment Unit Terminal Adjustment Unit Parts Method Specifications/Remarks Condition Item T K - 480/4 8 1 1. Sensitivity 1) SYS – GRP : 1 – 1 SSG Panel ANT Check 12dB SINAD or more. check SSG output : – 116dBm MOD : 1kHz AF VTVM DEV : ± 3kHz (TK-480) Oscilloscope : ± 1.5kHz (TK-481) Distortion meter 2. Squel[...]

40 T K - 480/4 8 1 CN No. Pin No. Name I/O Function TX-RX UNIT (X57-5630-XX) : TX-RX section CN1 1 B O Power input after passing through the fuse. 2B O Power input after passing through the fuse. 3 SB I Power output after power switch. 4 SB I Power output after power switch. 5 5M O 5V. 6 VOL I Volume level input for audio control. 7E – GND 8 EN2 [...]

S R Q P O N M L K J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C338 S301 MON S302 PTT S303 LAMP J72-0517-22 C330 C337 C329 C336 C316 C317 CN302 1 2 SP– SP+ LCD ASSY C 3 6 9 # D310 D308 0 8 5 2 B D306 D305 A D307 D309 * 7 4 1 S + – MIC300 D301 J72-0517-22 41 42 DISPLA Y UNIT (X54-3210-XX) -10 : K -11 : K2 Component side view Component si[...]

A B C D E F G H I J K L M N O P Q R S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 CN300 R306 D320 Q301 R314 R318 Q308 R325 R324 CP300 C340 R331 R332 C318 L302 C312 R315 C307 Q310 C343 AM SB 5M 1 3 4 6 1 3 4 6 G S D 1 24 SB ME LG AUX NC AM GND KI1 DT RXD PF AE MIC LBL LR PTT CS 5M KI2 KRS TXD CK NC AF IC301 16 1 8 9 D317 D318 D315 D316 D302 CP301 CP303 CP302 C[...]

S R Q P O N M L K J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 CN300 R306 D320 Q301 R314 R318 Q308 R325 R324 CP300 C340 R331 R332 C318 L302 C312 R315 C307 Q310 C343 AM SB 5M 1 3 4 6 1 3 4 6 G S D 1 24 SB ME LG AUX NC AM GND KI1 DT RXD PF AE MIC LBL LR PTT CS 5M KI2 KRS TXD CK NC AF IC301 16 1 8 9 D317 D318 D315 D316 D302 CP301 CP303 CP302 C[...]

A B C D E F G H I J K L M N O P Q R S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 GND D2 OPT LOK RXEMAI RXD AUXRXD SB SQ D1 5C AAC RXWMAO TXD AUXTXD AUDIOBEEP MONI LAMP DEO DI9 RXAO RXAI PTTOUT TXAO PTTIN TXAI/MUTE DI/ANI RSSI B VC ANT R419 R420 R4 R5 R7 R98 R86 R57 R11 R32 C58 C75 CF1 C79 R13 R422 R148 R3 C197 C195 X2 C92 C80 C15 C60 R161 C123 C111 C112 C100[...]

S R Q P O N M L K J I H G F E D C B A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C13 C38 C30 C31 IC6 C20 CN12 CN4 CN11 Q4 Q14 Q13 D 4 D5 Q6 R36 R130 R132 R133 R135 R101 R170 R169 R167 R168 R158 CN5 R151 R96 R94 R100 R91 C198 C135 C99 C133 C125 C127 C122 C209 C208 R141 R15 R142 R115 R108 R109 R117 R152 R102 R155 R97 R22 R24 R26 R171 R163 R160 R126 R20 R28 C46[...]

A B C D E F G H I J K L M N O P Q R S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 GND D2 OPT LOK RXEMAI RXD AUXRXD SB SQ D1 5C AAC RXWMAO TXD AUXTXD AUDIOBEEP MONI LAMP DEO DI9 RXAO RXAI PTTOUT TXAO PTTIN TXAI/MUTE DI/ANI RSSI B VC ANT R419 R420 R4 R5 R7 R98 R86 R57 R11 R32 C58 C75 CF1 C79 R13 R422 R148 R3 C197 C195 X2 C92 C80 C15 C60 R161 C123 C111 C112 C100[...]

56 T R P N L J H F D B S Q O M K I G E C A 1 3 5 7 2 4 6 SCHEMA TIC DIAGRAM TK - 480/48 1 Note : Components marked with a dot (·) are parts of pattern 1.[...]

TK - 480/48 1 T K - 480/48 1 57 BLOCK DIAGRAM[...]

59 T K - 480/4 8 1 LEVEL DIAGRAM (TK-480) RX Section VCO IC14 * C131 PLL Q10 C136 Q17 C193 Q11 D5 C149 Q12 C152 Power module D7 C169 L30 ANT 2.5W –11.7dBm (Q10 open) –7.8dBm (Q17 open) –1.9dBm (D5 open) +7.1dBm (Q12 open) +17.5dBm (C152 open) RF (815.50MHz) EMC MIC 12 LPF ALC COMP SW IDC 6 DAC I5 O5 DAC I2 O2 13 15 16 18 19 9 8 IC12 16.6mV rm[...]

60 T K - 480/4 8 1 LEVEL DIAGRAM (TK-481) VCO IC14 * C131 PLL Q10 C136 Q17 C193 Q11 D5 C149 Q12 C152 Power module D7 C169 L30 ANT 2.5W – 10.2dBm (Q10 open) – 7.4dBm (Q17 open) – 0.4dBm (D5 open) +5.3dBm (Q12 open) +17.8dBm (C152 open) RF (899.00MHz) EMC MIC 12 LPF ALC COMP SW IDC 6 DAC I5 O5 DAC I2 O2 13 15 16 18 19 9 8 IC12 16.1mV rms 16.7mV[...]

61 T K - 480/4 8 1 KNB-16A/17A (Ni-Cd BA TTERY) / KPG-36 (PROGRAMMING INTERF ACE CABLE) / KSC-19 (CHARGER) KNB-16A KNB-17A External View External View KNB-16A Specifications Voltage ....................................... 7.2V (1.2V x 6) Charging current ........................ 1100mAh Dimensions (mm) ...................... 58 W x 110.8 H x 17.2 D[...]

62 T K - 480/4 8 1 SPECIFICA TIONS General Frequency Range RX ......................................................... TK-480 : 851 to 870MHz TK-481 : 935 to 941MHz TX ......................................................... TK-480 : 806 to 825MHz (851 to 870MHz : Talk-Around) TK-481 : 896 to 902MHz (935 to 941MHz : Talk-Around) Systems .........[...]

63 T K - 480/4 8 1[...]

T K - 480/4 8 1 KENWOOD CORPORA TION 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 L5T 1S8 KENWOOD ELECTRONICS DEUTSCHLAND GMBH Rembrücker Str. 15, 63[...]