Kenwood TK-7102 Service Manual Download

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TK-7102

VHF FM TRANSCEIVER

TK-7102

SERVICE MANUAL

Panel assy
(A62-0942-03)

Front glass
(B10-2668-03)

Cabinet
(A01-2178-02)

Key top
(K29-9065-01)

SPECIFICATIONS

GENERAL

Frequency Range ................................ 146 to 174MHz

Number of Channels ........................... 4 channels

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 ...................................... Less than 0.4A on standby

Less than 1.0A on receive

Less than 8.0A on transmit

Operating Temperature Range ........... –30°C to +60°C

Dimensions & Weight ........................ 160 (W) x 43 (H) x 107 (D) mm, Approx 1.0kg

Channel Frequency Spread ................ 28MHz

RECEIVER

(Measurements made per EIA standard EIA/TIA-603)

Sensitivity (12dB SINAD) .................... Wide : 0.28µV

Narrow : 0.35µV

Selectivity ........................................... Wide : 75dB

Narrow : 65dB

Intermodulation ................................... Wide : 70dB

Narrow : 60dB

Spurious Response ............................. 75dB

Audio Power Output ........................... 4.0W

Frequency Stability ............................. ±2.5ppm

TRANSMITTER

(Measurements made per EIA standard EIA/TIA-603)

RF Power Output ................................ 25W

Spurious and Harmonics ..................... 70dB

Modulation .......................................... Wide : 16K0F3E

Narrow : 11K0F3E

FM Noise ............................................ Wide : 45dB

Narrow : 40dB

Audio Distortion .................................. Less than 3%

Frequency Stability ............................. ±2.5ppm

KENWOOD CORPORATION

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, 63150 Heusenstamm, Germany

KENWOOD ELECTRONICS BELGIUM N.V.

Mechelsesteenweg 418 B-1930 Zaventem, Belgium

KENWOOD ELECTRONICS FRANCE S.A.

13, Boulevard Ney, 75018 Paris, France

KENWOOD ELECTRONICS U.K. LIMITED

KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB United Kingdom

KENWOOD ELECTRONICS EUROPE B.V.

Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands

KENWOOD ELECTRONICS ITALIA S.p.A.

Via G. Sirtori, 7/9 20129 Milano, Italy

KENWOOD IBERICA S.A.

Bolivia, 239-08020 Barcelona, Spain

KENWOOD ELECTRONICS AUSTRALIA PTY. LTD.

(A.C.N. 001 499 074)
16 Giffnock Avenue, Centrecourt Estate, North Ryde, N.S.W. 2113, Australia

KENWOOD ELECTRONICS (HONG KONG) LTD.

Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Kwai Fong, N.T.,
Hong Kong

KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD.

Sales Marketing Division
1 Ang Mo Kio Street 63, Singapore 569110

Summary of Contents for TK-7102

Page 1: ...45dB Narrow 40dB Audio Distortion Less than 3 Frequency Stability 2 5ppm KENWOOD CORPORATION 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 63150 Heusens...

Page 2: ...ation mobile or base be obtained by the equip ment owner The licensee is responsible for ensuring trans mitter power frequency and deviation are within the limits permitted by the station license Transmitter adjustments may be performed only by a li censed technician holding an FCC first second or general class commercial radiotelephone operator s license There is no license required to install or...

Page 3: ...sories will be mounted Plan cable runs for protection against pinching or crush ing wiring and radio installation to prevent overheating 4 2 Antenna The favored location for an antenna is in the center of a large flat conductive area usually at the roof center The trunk lid is preferred bond the trunk lid and vehicle chassis using ground straps to ensure the lid is at chassis ground 4 3 Radio The ...

Page 4: ... from 1 to 4 u Microphone jack Insert the microphone plug into this jack the micro phone is an optional accessory i Speaker Internal speaker o PTT switch Press this switch then speak into the microphone to call a station 1 3 Auxiliary Programmable Functions Emergency Scan On OFF Key Lock Talk Around Monitor Temporary Delete None no function 1 2 Microphone OPERATING FEATURES q w e t r y u i o 1 4 D...

Page 5: ...s scanning Pressing this key stops scanning Talk around Press this key the transceiver uses the receive fre quency and the tone for transmission The operator can call the other party directly without re peater Press this key again the talk around function goes off Temporary delete The Add channel contained in the scan sequence and Delete channel is not contained In the scan mode this key switches ...

Page 6: ...n transmit again TOT reset time The transceiver has TOT reset timer This timer is the minimum wait time allowed during a transmission that will reset the TOT count TOT reset time causes the TOT to continue even after PTT is released unless the TOT reset timer has expired Clear to transpond The transceiver waits the transpond of DTMF if channel is busy until channel open This feature prevents the i...

Page 7: ... of time pro grammed before the TOT expires TOT time TOT pre alert time Pre alert tone sounding time You can select yes or no for the optional feature s warning tone OPERATING FEATURES REALIGNMENT REALIGNMENT 1 Modes User mode PC mode Data program ming mode PC test mode PC tuning mode Clone mode Mode Function User mode For normal use PC mode Used for communication between the radio and PC IBM comp...

Page 8: ...lave is re ceiving the data 4 LEDs MON LED LED are turned on and BUSY LED blinked When cloning of data is com pleted the master TX LED turned off and the slave au tomatically operates in the User mode The slave can then be operated by the same program as the master 5 The other slave can be continuously cloned Carry out the operation in step 2 to 4 3 3 KPG 46 Description PC programming interface ca...

Page 9: ...emove the cabinet first turn the transceiver up side down Detach the cabinet by prying the tabs as shown below 3 To remove the display unit PCB detach the PCB by lifting at the indents of the PCB as shown below Fig 3 Fig 4 4 When mounting the front panel match the 4 tabs of the chassis with the panel being sure they attach securely tabs tabs tabs indents tabs tabs ...

Page 10: ... IC5 FM processing IC The signal is heterodyned again with a second local oscillator signal within IC5 to create a 450kHz second IF signal The second IF signal is then fed through a 450kHz ceramic filter Wide CF1 Narrow CF2 to further eliminate unwanted signals before it is amplified and FM de tected in IC5 Item Rating Nominal center frequency 49 95MHz Pass bandwidth 5 0kHz or more at 3dB 35dB sto...

Page 11: ... circuit CIRCUIT DESCRIPTION Fig 3 Wide Narrow changeover circuit Narrow IC6 91pin IF_IN MIX_O IC5 IF System CF2 Narrow CF1 Wide R74 R78 R77 R73 D13 D15 Wide IC6 92pin AF AMP AF Filter D A CONV IC3 IC10 IC3 DEO AF PA IC102 SP IF IC IC5 Q18 NOISE AMP D18 IC5 IC6 AF RSSI DET CPU IF SYSTEM SQIN RSSI PLL Frequency Synthesizer The PLL circuit generates the first local oscillator signal for reception an...

Page 12: ...Fig 7 Unlock circuit Q20 BUFFER 2SC4649 N P Q23 RF AMP 2SC3357 Q25 ANT RF AMP 2SC2954 IC101 POWER AMP M67741H 32 IC23 1 2 DIVIDER UPB1509GV IC3 Q11 D A CONVERTER M62363FP X1 TCXO 16 8MHz VCO 2SK508NV K52 IC1 PLL MB15A02 Q15 BUFFER 2SC5108 Y Q3 BUFFER 2SC4649 N P IC4 BUFFER NJM2902V IC6 IC3 MIC KEY INPUT CPU 784214GC D A CONVERTER M62363FP IC3 D A CONVERTER M62363FP IC4 SUM AMP NJM2902V IC22 IC21 1...

Page 13: ...7 PRI DRIVER DC AMP IC4 ANT SW D30 31 LPF ANT POWER DET D34 36 IC12 APC CONTROL D19 PC IC3 3pin IC3 D A converter IC1 PLL IC9 DTMF DECO IC6 CPU DTMDAT DTMCLK DTMSTD DAST CNTDT CNTCK PLLE DT CK Display Circuit The CPU IC6 controls the display LEDs When the trans ceiver is busy the LEDG line goes high Q4 turns on and the green LED D11 lights In transmit mode the LEDR line goes high Q8 turns on and t...

Page 14: ...56 x n VDAref Vin Analog input VDAref D A reference voltage n Serial data value from the microprocessor CPU Power Supply Circuit When the POWER switch on the display unit is pressed the power port on the display unit which is connected to CPU port 18 POWER goes low then CPU port 93 SBC goes high Q34 turns on SB SW Q42 turns on and power SB is supplied to the radio This circuit has an overvoltage p...

Page 15: ... O Function Port3 44 FNC4 I O Function Port4 45 FNC5 I O Function Port5 46 FNC6 I O Function Port6 47 FNC7 I O Function Port7 Pin No Name I O Function 48 FNC8 I O Function Port8 49 NC I 50 MUTE1 O AF Mute 51 MUTE2 O Speaker Mute 52 MUTE3 O AF AMP SW 53 DT O Common Data 54 CK O Common Clock 55 NC I 56 EEPCK O EEPROM Clock 57 EEPDT I O EEPROM Data 58 EEPWT O EEP Write Protect 59 DST1 I Destination 1...

Page 16: ...VARICAP RF BPF TUNING D26 VARICAP RF BPF TUNING D27 DIODE TEMPERATURE COMPENSATION D30 DIODE ANT SW D31 DIODE ANT SW Ref No Use Function Operation Condition D34 DIODE APC VOLTAGE DETECT D36 DIODE APC VOLTAGE DETECT D38 DIODE REVERSE CONNECT PROTECTION D39 DIODE OVER VOLTAGE DETECTION D41 POLY SW CURRENT PROTECTION D43 DIODE OR GATE Mic Mute AGC D44 DIODE AGC Q2 FET Emergency Mic mute Active while ...

Page 17: ...B Active when power on Q43 FET AF MUTE Active while Mute1 is H Q101 TRANSISTOR APC Control IC1 IC PLL SYNTHESIZER IC3 IC DIGITAL POTENTIOMETER IC4 IC BUFFER AMP IC5 IC FM DEMODULATION IC6 IC CPU IC7 IC EEPROM IC9 IC DTMF DECODE C10 IC Audio Filter IC11 IC Active Filter QT DQT IC12 IC DC AMP IC14 IC Voltage regulator 5C IC15 IC Votage detector Reset IC16 IC AF AMP IC17 IC Voltage regulator 5M IC18 ...

Page 18: ... not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert TK 7102 Ref No TX RX UNIT X57 6290 20 DISPLAY UNIT X54 3340 20 TX RX UNIT X57 6290 20 C12 CC73GB1H102K CHIP C 1000PF K C14 C92 0560 05 CHIP TAN 10UF 6 3WV C22 CK73GB1H102K CHIP C 1000PF K C24 CK73GB1H103K CHIP C 0 010UF K C25 CC73GCH1H220J CHIP C 22PF J C26 CK73GB1C104K CHIP C ...

Page 19: ...K CHIP C 0 10UF K C174 CC73GCH1H101J CHIP C 100PF J C176 CK73GB1H102K CHIP C 1000PF K C177 CC73GCH1H220J CHIP C 22PF J C178 CK73GB1C104K CHIP C 0 10UF K C179 CK73GB1H102K CHIP C 1000PF K C180 CK73GB1H103J CHIP C 0 010UF J C182 CK73GB1C104K CHIP C 0 10UF K C184 CK73GB1H102K CHIP C 1000PF K C185 CK73GB1H103J CHIP C 0 010UF J C186 CC73GCH1H020B CHIP C 2 0PF B C187 188 CK73GB1H102K CHIP C 1000PF K C19...

Page 20: ...CHIP C 470PF K C374 C92 0507 05 CHIP TAN 4 7UF 6 3WV C375 CK73GB1C104K CHIP C 0 10UF K C376 CK73GB1H102K CHIP C 1000PF K C377 C92 0004 05 CHIP TAN 1 0UF 16WV C378 CK73GB1H102K CHIP C 1000PF K C379 CK73GB1C104K CHIP C 0 10UF K C508 CK73GB1H102K CHIP C 1000PF K C511 CK73GB1H102K CHIP C 1000PF K C512 513 CC73GCH1H101J CHIP C 100PF J C514 CC73GCH1H100C CHIP C 10PF C C515 CC73GCH1H040B CHIP C 4 0PF B C...

Page 21: ...1 16W R60 RK73GB1J103J CHIP R 10K J 1 16W R61 RK73GB1J473J CHIP R 47K J 1 16W R62 63 RK73GB1J104J CHIP R 100K J 1 16W R64 RK73GB1J154J CHIP R 150K J 1 16W R67 RK73GB1J223J CHIP R 22K J 1 16W R70 RK73GB1J473J CHIP R 47K J 1 16W R72 RK73GB1J224J CHIP R 220K J 1 16W R73 74 RK73GB1J103J CHIP R 10K J 1 16W R76 RK73GB1J101J CHIP R 100 J 1 16W R77 78 RK73GB1J103J CHIP R 10K J 1 16W R80 85 RK73GB1J102J CH...

Page 22: ... 16W R219 RK73GB1J105J CHIP R 1 0M J 1 16W R221 RK73FB2A331J CHIP R 330 J 1 10W R224 RK73FB2A150J CHIP R 15 J 1 10W R227 RK73GB1J223J CHIP R 22K J 1 16W R228 RK73GB1J184J CHIP R 180K J 1 16W R229 RK73GB1J223J CHIP R 22K J 1 16W R232 RK73GB1J184J CHIP R 180K J 1 16W R233 RK73FB2A331J CHIP R 330 J 1 10W R234 RK73GB1J153J CHIP R 15K J 1 16W R236 R92 1213 05 CHIP R 100 J 1 2W R237 RK73GB1J104J CHIP R ...

Page 23: ...5MA27 SURGE ABSORBER D39 02DZ18 X Y ZENER DIODE D41 1812L110PR VARISTOR D43 DAN222 DIODE D44 1SS372 DIODE IC1 MB15A02 MOS IC IC3 M62363FP MOS IC IC4 NJM2902V MOS IC IC5 TK14489V BI POLAR IC IC6 784214AGC119 MPU IC7 24LC08BT ISN ROM IC IC9 LC73872M MOS IC IC10 NJM2902V MOS IC IC11 NJM2904V MOS IC IC12 TA75S01F MOS IC IC14 NJM78L05UA BI POLAR IC IC15 PST9140NR MOS IC IC17 NJM78L05UA BI POLAR IC IC18...

Page 24: ... 700 are not supplied A B 1 2 3 1 16 C C C C C A A A A B B B B B B B 12 9 18 TX RX UNIT 7 14 2 6 17 3 4 15 11 26 10 DISPLAY UNIT SP B B A N67 3008 46 PAN HEAD SEMS SCREW B N87 2606 46 BRAZIER HEAD TAPTITE SCREW C N87 2614 46 BRAZIER HEAD TAPTITE SCREW 13 For KEY 1 only ...

Page 25: ... 0395 05 Protection bag H25 0103 04 8 DC cord E30 3339 05 19 Inner Packing Case H02 0617 02 5 Instruction Manual B62 1389 00 20 Polystyrene Foamed Fixture H10 6636 03 24 Item Carton Case H52 1699 02 Protection Bag H25 2320 04 21 Polystyrene Foamed Fixture H10 6639 03 25 Bracket J29 0662 03 C D 1 2 3 ...

Page 26: ...nter Frequency Stability 0 2ppm or less 7 Ammeter 20A 8 AF Volt Meter Frequency Range 50Hz to 10kHz AF VTVM Voltage Range 1mV to 3V 9 Audio Generator AG Frequency Range 20Hz to 20kHz or more Output 0 to 1V 10 Distortion Meter Capability 3 or less at 1kHz Input Level 50mV to 10Vrms 11 4Ω Dummy Load Approx 4Ω 10W or more 12 Regulated Power Supply 13 6V approx 20A adjustable from 9 to 17V Useful if a...

Page 27: ...X UNIT X57 629 Component side ANT TC5 TC2 TC1 TC3 L22 BPF B GND TX RX UNIT X57 629 Foil side Foil Side View Power MIC jack 1 2 3 4 keys Volume up down PF key Speaker Display Locator Speaker cable Pin1 marker IC 102 TX RX UNIT X57 629 Component side SPEAKER CABLE The speaker cable should be formed before mounting the shield cover as below Part name label face down FUSE To mount the Fuse the cable t...

Page 28: ...igh wide 2 Tra generator output 30dBm Connect the spectrum analyzer to BPF terminal PCB Section Item 1 Setting 2 VCO lock voltage 3 IF Coil 4 RF Band pass filter Measurement Adjustment Parts PC key Method Check Adjust to open the squelch Specifications Remarks SINAD 12dB or higher Terminal ANT Ext SP Test equipment SSG Oscilloscope AF V M Distortion meter Condition 1 CH RX low Wide Narrow CH RX ce...

Page 29: ...X low CH TX low CH TX center CH TX high CH TX high 2 Transmit 1 CH TX low CH TX low CH TX center CH TX high CH TX high 2 Transmit 1 CH TX low Wide CH TX center Wide Narrow CH TX high Wide 2 Transmit 1 CH TX low Wide CH TX center Wide Narrow CH TX high Wide 2 AG 1kHz 50mV 3 Transmit 1 CH TX center Wide Narrow 2 AG 1kHz 5mV 3 Transmit 1 CH TX low Wide CH TX center Wide Narrow CH TX high Wide 2 Trans...

Page 30: ...30 TK 7102 TK 260 K K2 BPF Wave Fig 1 ADJUSTMENT ...

Page 31: ... L 0 1 1 1 D H 1 1 2 1 D H 2 1 DISPLAY UNIT X57 3340 20 Component side view POWER D4 UP DOWN D7 1 2 3 4 D2 D8 D9 D10 D1 PROG D3 MONI D5 D6 D12 D11 J1 J72 0790 02 POWER D4 UP DOWN D7 1 2 3 4 D2 D8 D9 D10 D1 PROG D3 MONI D5 D6 D12 D11 J1 J72 0790 02 8 8 4 4 1 1 5 5 C17 Q10 Q2 Q6 Q4 Q8 Q1 Q5 R14 R9 R10 C11 C10 R13 R7 R8 C16 R6 R5 R4 R3 R2 R1 C4 CN1 R15 Q9 C13 C12 C9 C8 CP4 CP3 Q3 Q7 R11 R12 C15 C14 1...

Page 32: ...4 Q22 Q43 S G D S G D Q2 D6 S G D D2 D1 D3 R46 C371 C60 C65 R60 R56 R34 CV C48 Q5 Q4 D7 C330 C331 C332 R28 R20 R15 C338 C29 C37 C34 C22 R184 R271 C256 C252 R23 L3 L2 IC1 1 10 11 20 Q6 R72 R12 C81 R88 X1 C14 C116 C114 C160 C106 C120 C335 C102 C138 C112 C111 R7 BPF C267 C270 C342 C374 R278 R277 R276 R113 R287 R153 R132 R173 R164 R111 AFV C88 R87 R307 R63 R73 R21 R22 R33 R42 R310 R311 C32 C30 C378 C5...

Page 33: ...15 R227 R304 R214 C196 C191 C192 C193 C222 C208 C128 C136 C147 C143 C158 C162 C152 C154 C133 C122 C146 C142 C127 C214 C226 C223 C212 C211 C185 C217 IC10 1 7 8 14 CF1 IC11 1 4 5 8 CF2 R319 C167 R306 R320 R181 R178 R183 R198 R167 L26 XF1 IC5 IC23 L22 1 1 4 5 8 10 11 20 Q18 Q20 BPF Q21 L15 Q3 R40 R62 R70 R107 R321 L20 C99 C95 C77 C74 C79 C86 C42 C109 C103 C115 C105 C108 C100 Q15 Q11 L7 L5 L11 L9 D12 ...

Page 34: ...51 R316 R258 R243 R249 R257 D36 C264 C269 TH1 C35 C87 C80 L55 C94 L17 C123 C150 C351 C28 C45 C53 C44 C61 C63 C59 C54 C52 C379 R24 R49 R45 R53 R48 R50 R41 R43 R47 R57 R52 R31 C51 C66 C62 R67 IC4 1 7 8 14 R27 R313 D43 IC3 1 12 13 24 C135 C119 TH5 L14 L12 C36 R51 R114 R136 R140 R144 R143 R134 R127 R335 R286 R137 R139 D39 Q35 IC19 1 4 5 8 Q32 B C E GND SP D41 R262 Q34 R239 R238 D27 R240 R154 C243 1 10...

Page 35: ...Note Component marked with a dot are parts of pattern1 A B C D E F G I H J K L M O N P Q S R 1 2 3 4 5 6 7 SCHEMATIC DIAGRAM TK 7102 ...

Page 36: ...46 LEVEL DIAGRAM RX section TX section BLOCK DIAGRAM TK 7102 TK 7102 TK 7102 TK 7102 43 45 44 ...

Page 37: ...46 LEVEL DIAGRAM RX section TX section BLOCK DIAGRAM TK 7102 TK 7102 TK 7102 TK 7102 43 45 44 ...

Page 38: ...ation mobile or base be obtained by the equip ment owner The licensee is responsible for ensuring trans mitter power frequency and deviation are within the limits permitted by the station license Transmitter adjustments may be performed only by a li censed technician holding an FCC first second or general class commercial radiotelephone operator s license There is no license required to install or...

Page 39: ...45dB Narrow 40dB Audio Distortion Less than 3 Frequency Stability 2 5ppm KENWOOD CORPORATION 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 63150 Heusens...

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