kenwood建伍TK-3107对讲机 英文维修手册 M2

© 2000-2 PRINTED IN JAPAN B51-8572-00(S) 141 TK-3107 GENERAL.................................................................. 2 REALIGNMENT ......................................................... 2 DISASSEMBLY FOR REPAIR ................................... 4 CIRCUIT DESCRIPTION ........................................... 5 SEMICONDUCTOR DATA ......................................... 8 DESCRIPTION OF COMPONENTS .......................... 9 PARTS LIST............................................................. 10 EXPLODED VIEW ................................................... 17 PACKING ................................................................. 18 ADJUSTMENT......................................................... 19 PC BOARD VIEWS TX-RX UNIT (X57-6030-11) ................................ 23 SCHEMATIC DIAGRAM .......................................... 29 BLOCK DIAGRAM .................................................. 33 LEVEL DIAGRAM ................................................... 35 KNB-15A (Ni-Cd BATTERY) ................................... 36 SPECIFICATIONS ................................ BACK COVER Antenna (T90-0694-15) Cabinet assy (A02-2448-13) Knob(VOLUME) (K29-5255-03) TK-3107 (16 channels) CONTENTS Knob (CHANNEL SELECTOR) (K29-5278-03) UHF FM TRANSCEIVER SERVICE MANUAL M2 version 2 TK-3107 MODE FUNCTION User Mode Use this mode for normal operation. PC Mode Use this mode, to make various settings by means of the FPU through the RS-232C port. Manufacture Mode Use this mode, to realign the various settings through the RS-232C port during manufacture work. 2 How to enter each mode MODE PROCEDURE User Mode Power ON PC Mode Connect to the IBM PC compatible machine and controled by the FPU. 1 Modes INTRODUCTION SCOPE OF THIS MANUAL This manual is intended for use by experienced technicians fami l ia r w i th s im i la r t ypes o f commerc ia l g rade communications equipment. It contains all required service information for the equipment and is current as of the publication data. Changes which may occur after publication are covered by either Service Bulletins or Manual Revisions. These are issued as required. ORDERING REPLACEMENT PARTS When order ing replacement parts or equipment information, the full part identification number should be included. This applies to all parts : components, kits, or chassis. If the part number is not known, include the chassis or kit number of which it is a part, and a sufficient description of the required component for proper identification. PERSONAL SAFETY The following precautions are recommended for personal safety : • DO NOT transmit until all RF connectors are verified secure and any open connectors are properly terminated. • SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere. • This equipment should be serviced by a qualif ied technician only. SERVICE This radio is designed for easy servicing. Refer to the schematic diagrams, printed circuit board views, and alignment procedures contained within. GENERAL/REALIGNMENT 3 Getting acquainted PC ModeUser Mode Manufacture Mode Destnation Number of CH RF power output M2 16 4W SpeakerAntenna Speaker/ microphone jacks Microphone ‹ PTT (Push-To-Talk) switch Press this switch, then speak into the microphone to call a station. Release the switch to receive. › Monitor key Press and hold to monitor how busy the current channel is and to monitor signals being received that do not contain the matched QT/DQT code. fi Channel selector Rotate to select channels 1 ~ 16. ˆ LED indicator Lights red while transmitting, green while receiving a signal. Flashes red when the battery voltage is low while transmitting. ° Power switch/ Volume control Turn clockwise to switch the transceiver ON. Turn counterclockwise until a click sounds, to switch the transceiver OFF. Rotate to adjust the volume level. PC MODE Preface The transceiver is programmed by using a personal computer, programming interface (KPG-22) and programming software (KPG-55D). The programming software can be used with an IBM PC or compatible. Figure 1 shows the setup of an IBM PC for programming. Connenction procedure 1. Connect the TK-3107 to the personal computer with the interface cable. 2. When data is transmitting from the transceiver the red LED lights. When data is received by the transceiver the green LED lights. Notes: • The data stored in the personal computer must match the Model Name when it is written into the EEPROM. • Do not press the [PTT] key during data transmission or reception. REALIGNMENT 3 TK-3107 REALIGNMENT Gray SP MIC Gray/Black 1.5D-XV Lead wire Gray-XV Shield wire Tuning cable (E30-3216-05) KPG-22 ANT RF Power meter or SSG KPG-55D IBM-PC - + - + } } Fig. 1 • KPG-22 description (PC programming interface cable: Option) The KPG-22 is required to interface the TK-3107 with the computer. It has a circuit in its D-subconnector (25-pin) case that converts the RS-232C Iogic level to the TTL Ievel. The KPG-22 connects the side panel jacks of the TK-3107 to the computer's RS-232C serial port. • Programming software description The KPG-55D Programming Disk is supplied in 3-1/2" the disk format. The Software on this disk allows a user to program the TK-3107 radios via a Programming interface cable (KPG-22). • Programming with IBM PC If data is transferred to the transceiver from an IBM PC with the KPG-55D, the destination data (basic radio information) for each set can be modified. Normally, it is not necessary to modify the destination data because their values are determined automatically when the frequency range (frequency type) is set. The values should be modified only if necessary. Data can be programmed into the EEPROM in RS-232C format via the SP MIC plug. In this mode the PTT Iine operates as TXD and RXD data lines respectively. 4 TK-3107 Separating the chassis from the unit 1. Remove the eleven screws » . 2. Remove the solder from the antenna terminal using a soldering iron then lift the unit off … . 3. Remove the two screws ‰ and remove the antenna connector. Note : When reassembling the unit in the chassis, be sure to solder the antenna terminal. DISASSEMBLY FOR REPAIR Separating the case assembly from the chassis 1. Remove the two knobs ¶ and three round nuts • . 2. Remove the two screws ‚ . 3. Expand the right and left sides of the bottom of the case assembly, Iift the chassis, and remove it from the case assembly „ . 4. Taking care not to cut the speaker lead ˛ , open the chassis and case assembly. Lever knob Cace assembly Antenna terminal Removing the lever 1. Raise the lever on the lower case Ò , insert a small flat screwdriver into the space between the case and lever, open the case carefully Ó and lift the lever off. Note : Do not force to separate the case from the lever. 5 TK-3107 1. Frequency configuration The receiver utilizes double conversion. The first IF is 38.85MHz and the second IF is 450kHz. The first local oscillator signal is supplied from the PLL circuit. The PLL circuit in the transmitter generates the necessary frequencies. Fig. 1 shows the frequencies. CIRCUIT DESCRIPTION ANT ANT SW RFAMP MCF CF IF SYSTEM AFAMP RX TX PA AMP TX AMP PLL VCO MIC AMP TCXO X3 multiply 38.85MHz 450kHz 38.4MHz 12.8MHz SP MIC Fig. 1 Frequency configuration 2. Receiver The receiver is double conversion superheterodyne, designed to operate in the frequency range of 470 to 490MHz. The frequency configuration is shown in Fig. 1. 1) Front - end RF amplifier An incoming signal from the antenna is applied to an RF amplifier (Q203) after passing through a transmit/receive switch circuit (D102 and D103 are off) and a 3-pole LC filter. After the signal is amplified (Q203), the signal is filtered by a band pass filter (a 3-pole LC filter) to eliminate unwanted signals before it is passed to the first mixer. The voltage of these diodes are controlled by to track the MPU (IC403) center frequency of the band pass filter. (See Fig. 2) Fig. 2 Receiver section configuration Item Rating Nominal center frequency 38.850MHz Pass band width ±5.0kHz or more at 3dB 40dB stop band width ±20.0kHz or less Ripple 1.0dB or less Insertion loss 4.0dB or less Guaranteed attenuation 80dB or more at fo -910kHz Terminal impedance 610 / 3PF Item Rating Nominal center frequency 450kHz 6dB band width ±6.0kHz or more 50dB band width ±12.5kHz or less Ripple 2.0dB or less at fo ±4kHz Insertion loss 6.0dB or less Guaranteed attenuation 35.0dB or more at fo ±100kHz Terminal impedance 2.0 k XF201:L71-0522-05 CF200:L72-0958-05 2) First Mixer The signal from the RF amplifier is heterodyned with the first local oscillator signal from the PLL frequency synthesizer circuit at the first mixer (Q202) to create a 38.85MHz first intermediate frequency (1st IF) signal. The first IF signal is then fed through two monolithic crystal filters (MCFs : XF201) to further remove spurious signals. 3) IF amplifier The first IF signal is amplified by Q201, and then enters IC200 (FM processing IC). The signal is heterodyned again with a second local oscillator signal within IC200 to create a 450kHz second IF signal. The second IF signal is then fed through a 450kHz ceramic filter (CF200) to further eliminate unwanted signals before it is amplified and FM detected in IC200. 4) AF amplifier The recovered AF signal obtained from IC200 is amplified by IC300 (1/4), filtered by the IC300 low-pass filter (2/4) and IC300 high-pass filter (3/4) and (4/4), and de-emphasized by R303 and C306. The AF signal is then passed through a WIDE/NARROW switch (Q303). The processed AF signal passes through an AF volume control and is amplified to a sufficient level to drive a loud speaker by an AF power amplifier (IC302). ANT D102,D103 BPF L208~L211 APC TUNE RF AMP Q203 BPF L214,L203,L204 MIXERQ202 MCF XF201 IF AMP Q201 CF200 IF, MIX, DET IC200 AF AMP LPF, HPF IC300 AF PA AMP IC302 SP WIDE/NARROW SW Q303 X3 multiply Q1 IC403 MPU TCXO 1st Local OSC (PLL) ANT SW 6 TK-3107 2) VCO The operating frequency is generated by Q4 in transmit mode and Q3 in receive mode. The oscillator frequency is controlled by applying the VCO control voltage, obtained from the phase comparator, to the varactor diodes (D2 and D4 in transmit mode and D1 and D3 in receive mode). The T/R pin is set high in receive mode causing Q5 and Q7 to turn Q4 off, and turn Q3 on . The T/R pin is set low in transmit mode. The outputs from Q3 and Q4 are amplified by Q6 and sent to the buffer amplifiers. 5) Squelch Part of the AF signal from the IC enters the FM IC again, and the noise component is amplified and rectified by a filter and an amplifier to produce a DC voltage corresponding to the noise level. The DC signal from the FM IC goes to the analog port of the microprocessor (IC403). IC403 determines whether to output sounds from the speaker by checking whether the input voltage is higher or lower than the preset value. To output sounds from the speaker, IC403 sends a high signal to the MUTE and AFCO Iines and turns IC302 on through Q302, Q304, Q305, Q306 and Q307.(See Fig. 3) 3. PLL frequency synthesizer The PLL circuit generates the first local oscillator signal for reception and the RF signal for transmission. 1) PLL The frequency step of the PLL circuit is 5 or 6.25kHz. A 12.8MHz reference oscillator signal is divided at IC1 by a fixed counter to produce the 5 or 6.25kHz reference frequency. The voltage controlled oscillator (VCO) output signal is buffer amplified by Q6, then divided in IC1 by a dual-module programmable counter . The divided signal is compared in phase with the 5 or 6.25kHz reference signal in the phase comparator in IC1. The output signal from the phase comparator is filtrered through a low-pass filter and passed to the VCO to control the oscillator frequency. (See Fig.4) FM IF IC IC200 IF AMP DET DET HPFAMP LPF IC301 QT/DQT Q303 W/N SW IC403 MPU BU SY M UT E AF CO T I 6 567 62 AF AMP IC300 LPF HPF Q302 SW IC302 AF PA AMP Q307 SW SW SP Q304, 305, 306 CIRCUIT DESCRIPTION 6) Receive signaling QT/DQT 300 Hz and higher audio frequencies of the output signal from IF IC are cut by a low-pass filter (IC301). The resulting signal enters the microprocessor (IC403). IC403 determines whether the QT or DQT matches the preset value, and controls the MUTE and AFCO and the speaker output sounds according to the squelch results. Fig. 4 PLL circuit PLL DATA 12.8MHz REF OSC I/M I/N PLL IC IC1 PHASE COMPARATOR CHARGE PUMP LPF 5kHz/6.25kHz D2, 4 D1, 3 Q4 TX VCO Q3 RX VCO Q6 BUFF AMP Q2 RF AMP Q5, 7 T/R SW 5kHz/6.25kHz Fig. 3 AF Amplifier and squelch 7 TK-3107 4. Transmitter 1) Transmit audio The modulation signal from the microphone is amplified by IC500 (1/2), passes through a preemphasis circuit, and amplified by the other IC500 (1/2) to perform IDC operation. The signal then passes through a low-pass filter (splatter fiIter) (Q501 and Q502) and cuts 3kHz and higher frequencies. The resulting signal goes to the VCO through the VCO modulation terminal for direct FM modulation. (See Fig. 6) 2) QT/DQT encoder A necessary signal for QT/DQT encoding is generated by IC403 and FM-modulated to the PLL reference signal. Since the reference OSC does not modulate the loop characteristic frequency or higher, modulation is performed at the VCO side by adjusting the balance. (See Fig. 6) CIRCUIT DESCRIPTION Fig. 6 Transmit audio QT/DQT MUTE VR501 MAX DEV BALANCE X1, IC1 D5, Q4 VCO REFERENCE OSC (TCXO) MIC IC500 (1/2) MIC AMP IC500 (1/2) IDC Q503 SW PREEMPHASIS Q501, 502 LPF (SPLATTER FILTER) IC403 TO QT/DQT VR500 3) VCO and RF amplifier The transmit signal obtained from the VCO buffer amplifier Q100, is amplified by Q101 and Q102. This amplified signal is passed to the power amplifier, Q105 and Q107, which consists of a 2-stage FET amplifier and is capable of producing up to 4W of RF power. (See Fig.7) 4) ANT switch and LPF The RF amplifier output signal is passed through a low- pass filter network and a transmit/receive switching circuit before it is passed to the antenna terminal. The transmit/ receive switching circuit is comprised of D101, D102 and D103. D102 and D103 are turned on (conductive) in transmit mode and off (isolated) in receive mode. Fig. 7 APC system AMP Q101,Q102 DRIVE AMP Q105 5T B Q103, Q104 B SW DET IC100 APC 5T Q109 SW Q106 SW APC 5T Q108 SW RX D102,103 ANT SW FINAL AMP Q107 ANT SW D101 LPF ANT 5T SW Q110 TH102 5) APC The automatic power control (APC) circuit stabilizes the transmitter output power at a predetermined level by sensing the drain current of the final amplifier Field Effect Transistor (FET) . The voltage comparator, IC100 (2/2), compares the voltage obtained from the above drain current with a reference voltage which is set using the microprocessor. An APC voltage proportional to the difference between the sensed voltage and the reference voltage appears at the output of IC100 (1/2). This output voltage controls the gate of the FET power amplifier, which keeps the transmitter output power constant. The transmitter output power can be varied by the microprocessor which in turn changes the reference voltage and hence, the output power. 6) Terminal protection circuit When the thermistor (TH102) reaches about 80˚C, the protection circuit turns on Q110 to protect transmitting final amplifier (Q107) from the over heating. 5. Power supply A 5V reference power supply [5M] for the control circuit is derived from an internal battery. This reference is used to provide a 5V supply in transmit mode [5T], a 5V supply in receive mode [5R], and a 5V supply common in both modes [5C] based on the control signal sent from the microprocessor. 6. Control system The IC403 CPU operates at 7.37MHz . This oscillator has a circuit that shifts the frequency according to the EEPROM data. 3) UNLOCK DETECTOR If a pulse signal appears at the LD pin of IC1, an unlock condition occurs, and the DC voltage obtained from D7, R6, and C1 causes the voltage applied to the UL pin of the microprocessor to go low. When the microprocessor detects this condition, the transmitter is disabled, ignoring the push-to- talk switch input signal. ( See Fig.5) Fig. 5 Unlock detector circuit IC1 LD PLL IC D7 C1 R6 5C IC403 UL MPU 8 TK-3107 SEMICONDUCTOR DATA Microprocessor: M38267M8L241GP (IC403) Pin No. I/O Port Name Function 59 O NC NC 60 O NC NC 61 O 5MC Control of power supply (5M) for everything except the microcomputer and EEPROM L : Power supply ON 62 O AFCO AF amp power suppIy H : ON 63 O RX TX/RX VCO select H : RX 64 O GLED Green LED control H : Lit 65 O RLED RED LED control H : Lit 66 O SAVE Save control H : Save off 67 O MUTE Mute control H : Mic mute L : AF mute 68 O 5RC Reception power suppIy control L : on 69 O 5TC Transmission power suppIy control H : on 70 O NC NC 71 O NC NC 72 O NC NC 73 O NC NC 74 O NC NC 75 O NC NC 76 O NC NC 77 O NC NC 78 O NC NC 79 O NC NC 80 O NC NC 81 O NC NC 82 O NC NC 83 O NC NC 84 O NC NC 85 O NC NC 86 O NC NC 87 O NC NC 88 O NC NC 89 l VCC Microcomputer power supply, 5V input 90 l VREF A/D conversion reference voltage ;connected to Vcc 91 l AVSS A/D converter power supply ;connected to Vss 92 O NC NC 93 O NC NC 94 O NC NC 95 O NC NC 96 I NC NC 97 l NC NC 98 I NC NC 99 I NC NC 100 I NC NC FET : 2SK2596(Q105) Absolute Maximum Ratings (Ta=25°C) Item VDSS VGSS ID Pch* Tch Tstg Rating 17V ±10V 0.4A 3W 150°C -45~+150°C *Tc=25°C FET : 2SK2595(Q107) Absolute Maximum Ratings (Ta=25°C) Item VDS VGSS ID Pch* Tch Tstg Rating 17V ±10V 1.1A 20W 150°C -45~+150°C *Tc=25°C Pin No. I/O Port Name Function 1 O VC1 NC 2 O VC2 NC 3 I NC NC 4 I TIBI QT/DQT external circuit centerpoint input 5 I TI QT/DQT signal input 6 I BUSY Busy input 7 l BATT Battery voltage detection 8 l NC NC 9 O VCCN Frequency regulation output 10 O APC/TUNE TX : Auto power control D/A outputRX : BPF tuning D/A output 11 I NC NC 12 I NC NC 13 l NC NC 14 l NC NC 15 O BEEP Beep output 16 O TO QT/DQT output 17 l NC NC 18 I PTT [PTT] key input Connected to RXD 19 O TXD RS-232C output Connected to SP/MIC test(REM) 20 I RXD RS-232C input Connected to [PTT]line 21 l NC NC 22 I SELF Self program L : disable 23 I MONl [MONl] key input 24 I NC NC 25 I NC NC 26 I NC NC 27 l NC NC 28 l ENC3 Encode input (channel select) 29 l ENC2 Encode input (channel select) 30 l ENC1 Encode input (channel select) 31 l ENC0 Encode input (channel select) 32 l INTO Power detection control 33 I RST Reset input 34 I NC NC 35 O NC NC 36 l XIN 7.3728MHz oscillator 37 O XOUT 7.3728MHz oscillator 38 I VSS GND 39 O SHIFT Beat shift H : shift on 40 O PABC Final supply H : on 41 O WNRC Audio reference sensitivityL : narrow 42 O WNTC MAX Dev. Control Narrow: H 43 l NC NC 44 l NC NC 45 I NC NC 46 l NC NC 47 l/O SDA EEPROM data line 48 O SCL EEPROM clock line 49 I UL PLL unlock detection pin L : unlock 50 l NC NC 51 I NC NC 52 I NC NC 53 l NC NC 54 I NC NC 55 O DT Common data output 56 O CK Common clock output 57 O NC NC 58 O LE PLL IC enable H : Iatches 9 TK-3107 DESCRIPTION OF COMPONENTS Ref No. Semiconductor Description IC1 IC PHASE LOCKED LOOPSYSTEM IC100 IC AUTOMATIC POWER CONTROL IC200 IC IF SYSTEM IC300 IC AUDIO AMP ACTIVE FILTER IC301 IC ACTIVE FILTER IC302 IC AUDIO POWER AMP IC400 IC RESET SWITCH IC401 IC EEPROM IC402 IC VOLTAGE DETECT IC403 IC MICRO PROCESSOR IC404 IC VOLTAG E REGULATER IC500 IC MIC AMP/LIMITER Q1 TRANSISTOR TRIPLER Q2 TRANSISTOR RF AMP Q3 FET VCO RX Q4 TRANSISTOR VCO TX Q5 FET DC SWITCH Q6 TRANSISTOR RF BUFFER AMP Q7 TRANSISTOR DC SWITCH Q8 TRANSISTOR RIPPLE FILTER Q1