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VHF FM TRANSCEIVER
TK-7102H
SERVICE MANUAL
© 2003-6 PRINTED IN JAPAN
REVISED
( )
B51-8610-10 N 975
This service manual applies to products with 50300001 or subsequent serial numbers.
In terms of the products with the serial numbers earlier than 50300001, refer to the TK-7102H service manual as per part No.
B51-8610-00 and B51-8627-00.
Chassis Cabinet Front glass Panel assy
(A10-4048-21) (A01-2181-01) (B10-2753-03) (A62-0942-03)
Modular jack
Key top
(E08-0877-05)
(K29-9065-01)
CONTENTS
GENERAL ..
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TK-7102H GENERAL 3. PRE-INSTALLATION CHECKOUT INTRODUCTION 3-1. Introduction SCOPE OF THIS MANUAL Each radio is adjusted and tested before shipment. How- This manual is intended for use by experienced techni- ever, it is recommended that receiver and transmitter opera- cians familiar with similar types of commercial grade commu- tion be checked for proper operation before installation. nications equipment. It contains all required service informa- tion for the equipment and is current as of thi
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TK-7102H GENERAL / SYSTEM SET-UP 5. INSTALLATION PLANNING – CONTROL STATIONS NOTE 5-1. Antenna system If you do not intend to use the 3.5-mm jack for the external Control station. The antenna system selection depends on speaker, fit the supplied speaker-jack cap to stop dust and many factors and is beyond the scope of this manual. Your sand from getting in. KENWOOD dealer can help you select an antenna system that will best serve your particular needs. 5-2. Radio location Select a convenient loc
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TK-7102H OPERATING FEATURES 1-3. Auxiliary Programmable Functions 1. Controls and Functions • Emergency • Scan On/OFF 1-1. Front Panel • Key Lock • Talk Around • Monitor • Temporary Delete q we rt i • None (no function) • AUX • Horn Alert • Scan + Temporary Delete 1-4. Display u y 1-2. Microphone Indicator Description Light while transmitting. Lights when a signal is detected on o the currently selected channel. Lights while the function programmed onto its corresponding key is activated. Ligh
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TK-7102H OPERATING FEATURES • Key lock 2. Operation Features Pressing this key causes the transceiver to accept entry of The TK-7102H is a VHF FM radio designed to operate in only the [Vol Up/Down]*, [Key lock], Microphone [PTT], conventional format. The programmable features are sum- [Monitor], [Emergency], and [Power] keys. marized. * Programmable 3. Transceiver Controls and Indicators • Monitor Used to release signalling (press once) or squelch (press 3-1. Front Panel Controls and hold for a
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TK-7102H OPERATING FEATURES ■ PTT ID 4. Scan Operating PTT ID provides a DTMF ANI or MSK ID to be sent with ■ SCAN start condition every time PTT (connect ID at beginning of transmission, dis- Two or more channels must be added to all channels that connect ID at end of transmission, or both). can be scanned. The transceiver must be in normal receive You can program PTT ID “on” or “off” for each group mode (PTT off). channel (DTMF). The contents of ID are programmed for When you activate the k
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TK-7102H OPERATING FEATURES ■ SP Unmute 7. Audible User Feedback Tones You can select the type of SP Unmute system for each The transceiver outputs various combinations of tones to channel. The selection is as follows. notify the user of the transceiver operating state. Carrier, QT/DQT: Refer to the help file on the KPG-70D, regarding the func- Channel with this option will not check ID Code in order to tions that are not listed below. open its speaker. Carrier+DTMF, QT/DQT+DTMF: ■ Stun on tone
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TK-7102H REALIGNMENT 3-2. Connection Procedure 1. Modes 1. Connect the TK-7102H to the personal computer with the interface cable. User mode 2. When the Power is switched on, user mode can be en- tered immediately. When the PC sends a command, the Data program- PC mode ming mode radio enters PC mode. When data is transmitted from transceiver, the red LED blink. Clone mode PC test mode PC tuning mode When data is received by the transceiver, the green LED blink. In the PC mode, 4CH LEDs, [MON] L
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TK-7102H REALIGNMENT 4. Clone Mode 5. Accessory Connection Cable (KCT-39) Programming data can be transferred from one radio to The KCT-39 is an accessory connection cable for connect- another by connecting them via their modular microphone ing external equipment. The connector has 15 pins and the jacks. The operation is as follows (the transmit radio is the necessary signal lines are selected for use. master and the receive radio is the slave). 5-1. Installing the KCT-39 in the Transceiver No
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TK-7102H REALIGNMENT 3. Insert the KCT-39 cable ( 5 ) into the chassis ( 6 ). The ■ Accessory Port Function wire harness band ( 7 ) must be inside the chassis and No. Color Internal Name face down. 13 10 7 4 1 4. Connect the KCT-39 to the TX-RX unit as shown in Figure connector 5 ( 8 ). 14 11 8 5 2 1 Red CN2-1 SB 15 12 9 6 3 2 Pink CN3-1 IGN Avoid forming the wiring towards 3 Black CN2-3 GND the shielding cover closure area. CN2 CN3 4 Brown CN3-3 DETO Chassis 7 Wire harness 5 Orange CN3-2 DATA
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TK-7102H REALIGNMENT / INSTALLATION 6-3. Modifying the Transceiver INSTALLATION Modify the transceiver as follows to turn the power on and off with the ignition key. 1. Optional Board 1. Remove the jumper resistor (0Ω ) R71 of the TX-RX unit. 1-1. Voice Scrambler Board Connection ■ Modification ■ Setting With the KPG-70D 1. Remove the cabinet and shielding cover from the trans- Select “External Devices” from the “Edit” menu and en- ceiver. able the “Ignition Sense”. 2. Delete R202 and R267 on th
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TK-7102H INSTALLATION 1-2. Example for Connection ■ Pins Connection ■ Picture (Trunking Board) Voice scrambler 12 pins lead wire 11 pins lead wire functions with connector (A) with connector (B) A A-12 – B A-11 – C A-10 – D A-9 – 5– B-5 6– B-7 7 A-8 – 8 A-7 – 9 A-3 – 10 – B-11 11 – B-9 12 – B-4 Cushion D (G13-1972-04) Avoid forming the wiring towards shielding cover closure area. Insulation sheet Trunking board TX-RX UNIT Component side Cushion C Cushion B TX-RX unit CN4 Front side CN3 CN2 Voice
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TK-7102H DISASSEMBLY FOR REPAIR 1. When you remove the panel, turn the transceiver up side 4. Mount the display unit down. Detach the panel by lifting the tabs as shown be- To mount the display unit on the panel, follow the correct low. procedures shown to ensure easy display unit assembly and good fitting onto the panel. Tabs q Snap in bottom of display unit first. w Snap in top of displaly unit. w Fig. 1 q 2. To remove the cabinet, first turn the transceiver up side down. Detach the cabinet by
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TK-7102H CIRCUIT DESCRIPTION ■ IF Amplifier Frequency Configuration The first IF signal is amplified by Q351, and the enters The receiver utilizes double conversion. The first IF is IC301 (FM processing IC). The signal is heterodyned again 49.95MHz and the second IF is 450kHz. The first local oscil- with a second local oscillator signal within IC301 to create a lator signal is supplied from the PLL circuit. 450kHz second IF signal. The second IF signal is then fed The PLL circuit in the tran
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TK-7102H CIRCUIT DESCRIPTION ■ Wide/Narrow Changeover Circuit ■ Squelch Circuit The Wide port (pin 65) and Narrow port (pin 64) of the CPU The detection output from the FM IF IC (IC301) passes is used to switch between ceramic filters. When the Wide through a noise amplifier (Q301) to detect noise. A voltage is port is high, the ceramic filter SW diodes (D303, D302) cause applied to the CPU (IC101). The CPU controls squelch ac- CF301 to turn on to receive a Wide signal. cording to the voltage
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TK-7102H CIRCUIT DESCRIPTION ■ Unlock Circuit Transmitter System During reception, the 8RC signal goes high, the 8TC signal ■ Outline goes low, and Q34 turns on. Q33 turns on and a voltage is The transmitter circuit produces and amplifies the desired applied to the collector (8R). During transmission, the 8RC frequency directly. It FM-modulates the carrier signal by signal goes low, the 8TC signal goes high and Q36 turns on. means of a varicap diode. Q35 turns on and a voltage is applied to 8
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TK-7102H CIRCUIT DESCRIPTION ■ Key Matrix Circuit Control Circuit The TK-7102H front panel has function keys. Each of The CPU carries out the following tasks: them is connected to a cross point of a matrix of the KMI1 to 1) Controls the WIDE, NARROW, TX/RX outputs. KMO2 ports of the microprocessor. The KMO1 to KMO2 2) Adjusts the AF signal level of the AF filter (IC251) and ports are always high, while the KMI1 to KMI4 ports are al- turns the filter select compounder on or off. ways low. 3) Co
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TK-7102H CIRCUIT DESCRIPTION / SEMICONDUCTOR DATA ■ Decode Q31 SB B • QT/DQT/DTMF SW The signal (W/NO (EVOL2)) goes to SIGNAL (pin 88) of CPU (IC101). The QT/DQT signal will pass through the low- Q71 Q32 IGN SW SW pass filters in the CPU (IC101) and be decoded within the D61 CPU (IC101). The DTMF signal will be decoded within the Q61 CPU (IC101). SW SBC IC101 CPU 5M 5M IC101 IC33 BATT CPU AVR 88 POWER SIGNAL W/NO (EVOL2) IC34 RST Fig. 15 Decode IC35 AVR POWER ■ D/A Converter SW The D/A conver
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TK-7102H SEMICONDUCTOR DATA Microprocessor : 30622MAA-B83GP (TX-RX Unit IC101) ■ Terminal Function Pin No. Name I/O Function Pin No. Name I/O Function 1 QT/DQT O QT/DQT output. 52 AMPSW O AF AMP switch. 2 DTMF/MSK O DTMF/MSK/BEEP output 53 DT O Common data. 3 PLLE O PLL IC chip select. 54 CK O Common clock. 4,5 NC I 55,56 NC I 6 GND - GND. 57~59 DST1~DST3 I Destination 1~3 7 CNVSS - DNVss for flash. 60 VCC - +5V. 8 EVLLD O E-volume LD. 61 NC I 9 BSHIFT O Beat shift. 62 VSS - GND. 10 RESET - Rese
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TK-7102H COMPONENTS DESCRIPTION Display Unit (X54-3460-20) Ref. No. Parts name Description Ref. No. Parts name Description Q254 Digital transistor AF mute / Active while SPM is H IC1 IC Shift register for LED & MICBL control Q255 Transistor AF mute / Active while AMPSW is H Q4 Transistor Busy light switch Q301 Transistor Noise amplifier / SQL amplifier Q9,10 Transistor Key backlit switch Q302 Transistor Buffer amplifier / 16.8MHz 3rd over tone D1~4 LED Key backlit Q351 Transistor IF amplifier D5
