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VHF FM TRANSCEIVER
TK-7102 TK-7102
SPECIFICATIONS
TK-7102
SERVICE MANUAL
GENERAL
Frequency Range ................................ 146 to 174MHz
© 2001-5 PRINTED IN JAPAN
Number of Channels........................... 4 channels
( )
B51-8584-00 S 283
Channel Spacing ................................. Wide : 25kHz Narrow : 12.5kHz
PLL Channel Stepping ........................ 2.5, 5, 6.25, 7.5kHz
Operating Voltage ............................... 13.6V DC ±15%
Current Drain ..........................
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TK-7102 TK-7102 CONTENTS / GENERAL TERMINAL FUNCTION CONTENTS GENERAL CN1 (TX-RX Unit) J1 (TX-RX Unit) Pin No. Name Function Pin No. Name Function 1 GND Ground 1SP Audio signal output to internal/external speaker. GENERAL ................................................................. 2 INTRODUCTION 2 PTT PTT/TXD 2 E Ground SCOPE␣ OF␣ THIS␣ MANUAL 3 HOOK Hook detection/RXD OPERATING FEATURES ......................................... 4 This manual is intended for use by experienced techni- 4 ME
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TK-7102 GENERAL 3. PRE-INSTALLATION␣ CHECKOUT 5. INSTALLATION␣ PLANNING – CONTROL␣ STATIONS 3-1. Introduction 5-1. Antenna system Each radio is adjusted and tested before shipment. How- Control station. The antenna system selection depends ever, it is recommended that receiver and transmitter opera- on many factors and is beyond the scope of this manual. tion be checked for proper operation before installation. Your KENWOOD␣ dealer can help you select an antenna sys- tem that will best serve you
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TK-7102 OPERATING FEATURES 1-4. Display 1. Controls and Functions 1-1. Front Panel q we rt i u y Indicator Description 1-2. Microphone Light while transmitting. Lights when a signal is detected on o the currently selected channel. Lights while the function pro- grammed onto its corresponding key is activated. Lights while the function pro- grammed onto its corresponding key is activated. q (Power) switch Press to switch the transceiver ON. Press and hold for Lights to display the currently se- a
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TK-7102 OPERATING FEATURES • Scan ON/OFF 2. Operation Features Press this key starts scanning. Pressing this key stops The TK-7102 is a VHF FM radio designed to operate in scanning. conventional format. The programmable features are sum- marized. • Talk around Press this key, the transceiver uses the receive fre- quency and the tone for transmission. 3. Transceiver Controls and Indicators The operator can call the other party directly (without re- 3-1. Front Panel Controls peater). Press this
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TK-7102 OPERATING␣ FEATURES n Temporary delete n Clear to transpond It is possible to delete channel temporary during scan. The transceiver waits the transpond of DTMF if channel When scan stops on unnecessary channel for example by is busy until channel open. This feature prevents the inter- interference of the other party, activate the delete function ference to other party. (for example press and hold the key for approximately one 6. Option Signalling (DTMF) second), then that channel is del
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TK-7102 OPERATING␣ FEATURES / REALIGNMENT n Stun REALIGNMENT If the stun code matches, a predetermined action will oc- cur. Whether option signalling is activated or not, when stun matches on any channel, the transceiver will become 1. Modes TX inhibited or TX/RX inhibited. While stun is active, if the User mode stun code + "#" code is received, stun will deactivate. When stun matches, transpond will function. Alert will PC mode Data program- not be output. ming mode Clone mode PC test mode P
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TK-7102 REALIGNMENT Adding the data password. 3-3. KPG-46 Description (PC programming interface cable : Option) If the data password is set in the optional feature menu, The KPG-46 is required to interface the TK-7102 to the you must enter the password (Master transceiver) to acti- computer. It has a circuit in its D-subconnector (25-pin) case vate a clone mode. that converts the RS-232C logic level to the TTL level. you can use 1, 2, 3, and 4 to configure the password. The The KPG-46 connec
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TK-7102 DISASSEMBLY FOR REPAIR 3. To remove the display unit PCB, detach the PCB by 1. When you remove the panel, turn the transceiver up lifting at the indents of the PCB as shown below. side down. Detach the panel by lifting the tabs as shown below. tabs indents Fig. 1 Fig. 3 2. To remove the cabinet, first turn the transceiver up 4. When mounting the front panel, match the 4 tabs of side down. Detach the cabinet by prying the tabs as the chassis with the panel, being sure they attach shown be
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TK-7102 CIRCUIT DESCRIPTION n IF Amplifier Frequency Configuration The first IF signal is amplified by Q19, and the enters IC5 The receiver utilizes double conversion. The first IF is (FM processing IC). The signal is heterodyned again with a 49.95MHz and the second IF is 450kHz. The first local oscil- second local oscillator signal within IC5 to create a 450kHz lator signal is supplied from the PLL circuit. second IF signal. The second IF signal is then fed through a The PLL circuit in the
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TK-7102 CIRCUIT DESCRIPTION n Wide/Narrow Changeover Circuit n Squelch Circuit The Wide port (pin 92) and Narrow port (pin 91) of the The detection output from the FM IF IC (IC5) passes CPU is used to switch between ceramic filters. When the through a noise amplifier (Q18) to detect noise. A voltage is Wide port is high, the ceramic filter SW diodes (D13, D15) applied to the CPU (IC6). The CPU controls squelch accord- cause CF1 to turn on to receive a Wide signal. ing to the voltage (SQIN) lev
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TK-7102 CIRCUIT DESCRIPTION IC1 : PLL IC Q11 Q3 TX VCO RF AMP 5kHz/6.25kHz 1/N Q15 BUFF LPF AMP D10,12 Phase Charge PLL Q10 DATA comparator pump REF RX VCO OSC Q7,12 T/R SW 1/M 5kHz/6.25kHz D9,11 16.8MHz Fig. 6 PLL circuit n Unlock Circuit Transmitter System During reception, the 8RC signal goes high, the 8TC sig- n Outline nal goes low, and Q29 turns on. Q31 turns on and a voltage The transmitter circuit produces and amplifies the de- is applied to the collector (8R). During transmission, the
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VOL VOL UD DN PF MON C1 C2 C3 C4 TK-7102 CIRCUIT DESCRIPTION n APC Circuit n Display Circuit The automatic transmission power control (APC) circuit The CPU (IC6) controls the display LEDs. When the trans- detects part of a power module output with a diode (D34, ceiver is busy, the LEDG line goes high, Q4 turns on and the D36) and applies a voltage to IC12. IC12 compares the APC green LED (D11) lights. In transmit mode, the LEDR line control voltage (PC) generated by the D/A converter (IC3) goe
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TK-7102 CIRCUIT DESCRIPTION n Encode n D/A Converter The QT and DQT signals are output from QT/DQT of the The D/A converter (IC3) is used to adjust MO modulation, CPU (IC6) and summed with the external pin DI line by the AF volume, TV voltage, FC reference voltage, and PC summing amplifier (IC4) and the resulting signal goes to the POWER CONTROL voltage level. D/A converter (IC3). The DTMF signal is output from DTMF Adjustment values are sent from the CPU as serial data. of the CPU and goes to
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TK-7102 SEMICONDUCTOR DATA Microprocessor : 784214AGCXXX (TX-RX Unit IC6) n Terminal function Pin No. Name I/O Function Pin No. Name I/O Function 1NC I 48 FNC8 I/O Function Port8 2 DTMOSC O DTMF IC Clock Control 49 NC I 3 PLLE O PLL IC Chip Select 50 MUTE1 O AF Mute 4 EVLLD O E-Volume LD 51 MUTE2 O Speaker Mute 5 DTMCK O DTMF Dec IC Clock 52 MUTE3 O AF AMP SW 6 DTMDT I/O DTMF Dec IC Data 53 DT O Common Data 7 UL O Unlock Detect 54 CK O Common Clock 8 BSHIFT O Clock Shift 55 NC I 9 VDD - 56 EEPCK
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TK-7102 DESCRIPTION OF COMPONENTS Ref. No. Use/Function Operation/Condition Display Unit (X54-3340-20) D34 DIODE APC VOLTAGE DETECT SYMBOL PARTS NAME DISCRIPTION D36 DIODE APC VOLTAGE DETECT D1~4 LED KEY BACKLIT D38 DIODE REVERSE CONNECT PROTECTION D5 LED MONITOR KEY LIGHT D39 DIODE OVER VOLTAGE DETECTION D6 LED PROGRAMMABLE KEY LIGHT D41 POLY SW CURRENT PROTECTION D7~10 LED CHANNEL KEY LIGHT D43 DIODE OR GATE /Mic Mute, AGC D11 LED BUSY D44 DIODE AGC D12 LED TRANSMIT Q2 FET Emergency Mic mute Q
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TK-7102 DESCRIPTION OF COMPONENTS Ref. No. Use/Function Operation/Condition Q34 TRANSISTOR DC SWITCH(SB) /Active when power on Q35 TRANSISTOR AF MUTE /Active while Mute3 is H Q37 TRANSISTOR BEAT SHIFT /Active while Beat shift is on Q38 TRANSISTOR OVER VOLTAGE DETECTION /Active while PS voltage is more than 18V Q41 TRANSISTOR MIC MUTE /Emergency Mic mute Q42 TRANSISTOR DC SWITCH(SB) /Active when power on Q43 FET AF MUTE Active while Mute1 is H Q101 TRANSISTOR APC Control IC1 IC PLL SYNTHESIZER IC
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TK-7102 PARTS LIST 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. TX-RX UNIT (X57-6290-20) TK-7102 New New Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts TX-RX UNIT (X57-6290-20) TK-7102 11B * A01-2178-02 CABINET C12 CC73GB1H102K CHIP C 1000PF K 23B * A10-4047-01 CH
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TK-7102 PARTS LIST TX-RX UNIT (X57-6290-20) New New Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C94 CC73GCH1H101J CHIP C 100PF J C180 CK73GB1H103J CHIP C 0.010UF J C95 CC73GCH1H050B CHIP C 5.0PF B C182 CK73GB1C104K CHIP C 0.10UF K C97 CC73GCH1H060B CHIP C 6.0PF B C184 CK73GB1H102K CHIP C 1000PF K C99,100 CC73GCH1H050B CHIP C 5.0PF B C185 CK73GB1H103J CHIP C 0.010UF J C101 CK73GB1H471K CHIP C 470PF K C186 CC73GCH1H020B CHIP C 2
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TK-7102 PARTS LIST TX-RX UNIT (X57-6290-20) New New Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C274 CK73GB1H103K CHIP C 0.010UF K C379 CK73GB1C104K CHIP C 0.10UF K C508 CK73GB1H102K CHIP C 1000PF K C275 CK73GB1C104K CHIP C 0.10UF K C277 CK73FB1A105K CHIP C 1.0UF K C511 CK73GB1H102K CHIP C 1000PF K C512,513 CC73GCH1H101J CHIP C 100PF J C279 CK73GB1H102K CHIP C 1000PF K C280 C92-0633-05 CHIP-TAN 22UF 10WV C514 CC73GCH1H100C CHI
