Instruction/ maintenance manual of the product FM Transceiver TK-481 Kenwood
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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 .
© 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 .
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.
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.
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.
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).
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.
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.
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.
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.
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.
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.
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.
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).
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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 MI.
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.
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.
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.
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 F5.
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.
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.
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.
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 .
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.
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.
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.
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 pow.
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.
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.
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.
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.
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.
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.
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 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 .
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/M.
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.
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/M.
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.
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.
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 .
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.
An important point after buying a device Kenwood FM Transceiver TK-481 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Kenwood FM Transceiver TK-481 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Kenwood FM Transceiver TK-481 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Kenwood FM Transceiver TK-481 you will learn all the available features of the product, as well as information on its operation. The information that you get Kenwood FM Transceiver TK-481 will certainly help you make a decision on the purchase.
If you already are a holder of Kenwood FM Transceiver TK-481, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Kenwood FM Transceiver TK-481.
However, one of the most important roles played by the user manual is to help in solving problems with Kenwood FM Transceiver TK-481. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Kenwood FM Transceiver TK-481 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
