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Kenwood TK-2140, Service Manual

The Kenwood TK-2140 is a reliable two-way radio that offers seamless communication in any environment. With a compact and durable design, this device ensures clear and uninterrupted audio transmission. Enhance the functionality of your TK-2140 by easily accessing its Service Manual, available for free download at manualshive.com.

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TK-2140

54

General

Frequency Range
RX, TX .............................................................................. K : 136 to 174MHz
Systems ........................................................................... Trunked Mode : Maximum 32
Groups ............................................................................. Maximum 250
Channels .......................................................................... Trunked Mode : Maximum 600

Conventional Mode : Maximum 250

Channel Spacing (Wide/Narrow) ...................................... 25kHz, 30kHz/12.5kHz, 15kHz
PLL Channel Stepping ..................................................... 2.5, 5.0, 6.25, 7.5kHz
Operating Voltage ............................................................ DC 7.5V 

±

20%

Battery Life ....................................................................... About 9 hours at 5-5-90 duty cycle with KNB-24L battery

About 8 hours at 5-5-90 duty cycle with KNB-25A battery
About 12 hours at 5-5-90 duty cycle with KNB-26N battery

Temprature Range ........................................................... –30˚C to +60˚C (-22˚F to + 140˚F)
Dimension and Weight

With KNB-24L (1400mAh battery) ................................. 4.13” (105mm) H x 2.21” (56mm) W x 1.16” (29.5mm) D x 0.66lbs (300g)

Receiver

 (Measurements made per TIA/EIA-603)

RF Input Impedance ......................................................... 50

Ω

Sensitivity

12dB SINAD (Wide/Narrow) .......................................... 0.25

µ

V/0.28

µ

V

Selectivity  (Wide/Narrow) ................................................ 70dB/65dB
Intermodulation (Wide/Narrow) ........................................ 70dB/65dB
Spurious ........................................................................... 70dB
Frequency Stability ...........................................................

±

0.00025% (-30˚C to +60˚C)

Channel Spread ............................................................... 38MHz : K
Audio Power Output ......................................................... 500mW at 16

Ω

 less than 5% distortion

Transmitter

 (Measurements made per TIA/EIA-603)

RF Power Output

Hi ................................................................................... 5W
Low ................................................................................ 1W

RF Output Impedance ...................................................... 50

Ω

Spurious ........................................................................... 70dB
Modulation (Wide/Narrow) ............................................... 16K0F3E/11K0F3E
FM Noise (Wide/Narrow) .................................................. 45dB/40dB
Audio Distortion ................................................................ Less than 3%
Frequency Stability ...........................................................

±

0.00025% (-30˚C to +60˚C)

Channel Spread ............................................................... 38MHz : K

SPECIFICATION

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.

Leuvensesteenweg 248 J, 1800 Vilvoorde, 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-2140

Page 1: ...EXPLODED VIEW 21 PACKING 22 ADJUSTMENT 23 TERMINAL FUNCTION 32 PC BOARD VIEWS TX RX UNIT X57 6400 10 33 SCHEMATIC DIAGRAM 43 BLOCK DIAGRAM 47 LEVEL DIAGRAM 49 KSC 25 50 KNB 24L KNB 25A KNB 26N KRA 22 53 SPECIFICATIONS BACK COVER CONTENTS Knob ENC K29 9134 03 Knob VOL K29 9133 03 Cabinet assy A02 3653 04 Knob PTT K29 9131 03 Antenna KRA 22 option Key top SW1 SW2 K29 9132 03 Does not come with anten...

Page 2: ...g precautions are recommended for personnel 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 qualified technician only SERVICE This radio is designed for easy servicing Refer to the schematic ...

Page 3: ...ge key Press to activate its auxiliary function page 13 6 Battery pack safety catch Flip this catch to prevent accidentally pressing the battery pack release latch 7 Battery pack release latch Press this latch to release the battery pack 8 PTT Push To Talk switch Press this switch then speak into the microphone to call a station 9 Side 1 Side 2 keys Press to activate their auxiliary functions 0 S ...

Page 4: ...e Y s e Y e l g g o T r o t i n o M s e Y s e Y e n o N s e Y s e Y e n o T e l b a t c e l e S r o t a r e p O s e Y o N l a i d e R s e Y s e Y w o L r e w o P F R s e Y s e Y n a c S s e Y s e Y d d A l e D n a c S s e Y s e Y e t e l e D y r a r o p m e T n a c S o N s e Y n o i t a u n e t t A P S 4 s e Y s e Y l e v e L h c l e u q S s e Y o N y r a t n e m o M f f O h c l e u q S s e Y s e ...

Page 5: ...unted on the TK 2140 This allows the TK 2140 to be upgraded when new features are released in the future For details on how to obtain the firmware contact Customer Service 6 2 Connection procedure Connect the TK 2140 to the personal computer IBM PC or compatible with the interface cable KPG 36 Connection is the same as in the PC Mode 6 3 Programming 1 Start up the programming software Fpro exe 2 S...

Page 6: ...ch D102 103 104 and D105 are off and then the bandpass filter L215 217 The bandpass filter is adjusted by a variable capacitor The input voltage to the variable capacitor is regulated by the voltage output from the D A converter IC307 The signal is amplified by RF amplifier Q207 and passed through the bandpass filter L210 213 The resulting signal is applied to the first mixer Q206 where it is mixe...

Page 7: ...t The demodulated signal from IC200 goes through the mute switch Q204 and is amplified by IC300 2 2 high pass filtered low pass filtered high pass filtered band eliminate filtered and de emphasized by IC500 The signal then goes through an AF amplifier IC305 2 2 an electronic volume control IC307 and an AF switch Q308 is on and is routed to audio power amplifier IC313 where it is amplified and outp...

Page 8: ...ther to output sounds from the speaker by comparing the input voltage of pin 91 and pin 93 with the preset value The output signal from the summing amplifier passes through the D A converter IC307 again and goes to the VCO modulation input The other output signal from the summing amplifier passes through the D A converter IC307 again for the BAL adjustment and the buffer amplifier IC302 2 2 and go...

Page 9: ...oprocessor When the PLL is unlocked the UL goes low CIRCUIT DESCRIPTION Fig 9 PLL block diagram T R TX Low T R VCO CV 5 IC1 PLL 8 BUFF BUFF LPF DP CP EP CPU UL IC309 VCXO IC302 FC BAL Q8 SW D101 To drive amp Q1 X1 To mixer SW MB D100 18 6 Control Circuit The control circuit consists of microprocessor IC309 and its peripheral circuits It controls the TX RX unit and transfers data to and from the di...

Page 10: ...1 1 2 to remove a low speed data The CPU digitizes this signal performs processing such as DC restoration and decodes the signal MSK ESN The MSK input signal from the IF IC is amplified by IC300 1 2 and goes to pin 5 of IC500 The signal is demodulated by MSK demodulator in IC500 The demodulated data goes to the CPU for processing 7 Signalling Circuit 7 1 Encode Low speed data QT DQT LTR Low speed ...

Page 11: ...needless save mode During transmission 5TC becomes Low and Q405 is turned ON to supply 5V 5T to the TX circuit During reception 5RC becomes Low and Q404 is turned ON to supply 5V 5R to the RX Circuit The power supply voltage monitor IC IC404 monitors power supply voltage SB If the voltage falls less than 5V the VOUT port goes LOW level the CPU INT port also goes LOW level and the CPU stops Q404 5R...

Page 12: ...or 34 RXD I Serial interface COM0 RXD0 to MIC connector 35 DAT O Common data output 36 CLK O Common clock output 37 RDY Can not used 38 ALE Can not used 39 HOLD Can not used 40 HLDA Can not used 41 BLCK Can not used 42 RD O Flash memory RD bus 43 BHE Can not used 44 WR O Flash memory WR bus 45 SAVE O Battery save output 46 SELF I Self programming mode enable input 47 CS MODE O LCD driver chip sele...

Page 13: ...ISTOR LCD AVR Q305 FET Int Ext Switch Q306 TRANSISTOR TX LED switch DESCRIPTION OF COMPONENTS Q307 FET Int Ext Switch Q308 FET Int Ext Switch Q309 TRANSISTOR BUSY LED switch Q310 TRANSISTOR LCD LED AVR switch Q311 TRANSISTOR LCD LED AVR Q400 FET 5MS Switch Q401 FET 5MS Switch Q403 TRANSISTOR 5R Switch Q404 FET 5R Switch Q405 TRANSISTOR 5T Switch Q406 FET SAVE Switch Q500 TRANSISTOR RX AF mute Q501...

Page 14: ...SAL 60 1A K29 9131 03 KNOB PTT 61 1B K29 9132 03 KEY TOP SW1 SW2 62 1B K29 9133 03 KNOB VOL 63 1B K29 9134 03 KNOB ENC A 2C N08 0548 04 DRESSED SCREW ACCESSORY B 3B N14 0569 04 CIRCULAR NUT C 3B N30 2604 46 PAN HEAD MACHINE SCREW D 3A N30 2608 46 PAN HEAD MACHINE SCREW E 3B N30 3006 45 PAN HEAD MACHINE SCREW F 3B N79 2035 46 PAN HEAD TAPTITE SCREW G 1A 2A N83 2005 46 PAN HEAD TAPTITE SCREW 70 2B R...

Page 15: ...K C211 CK73HB1H102K CHIP C 1000PF K C212 CC73HCH1H220J CHIP C 22PF J C213 CC73HCH1H100D CHIP C 10PF D C214 CK73HB1A104K CHIP C 0 10UF K C215 C92 0773 05 CHIP TAN 15UF 6 3WV C216 CK73HB1A104K CHIP C 0 10UF K C217 CK73HB1H221K CHIP C 220PF K C218 CK73HB1A104K CHIP C 0 10UF K C219 CK73HB1A333K CHIP C 0 033UF K C220 CK73HB1A104K CHIP C 0 10UF K C221 CC73HCH1H680J CHIP C 68PF J C222 CK73HB1A104K CHIP C...

Page 16: ... 384 CC73HCH1H470J CHIP C 47PF J C386 CC73HCH1H470J CHIP C 47PF J C388 CK73HB1H102K CHIP C 1000PF K C389 CC73HCH1H470J CHIP C 47PF J C390 CK73HB1A104K CHIP C 0 10UF K C391 392 CK73HB1C103K CHIP C 0 010UF K C394 398 CK73HB1A104K CHIP C 0 10UF K C399 CK73HB1C103K CHIP C 0 010UF K C400 CK73HB1H102K CHIP C 1000PF K C402 405 CK73HB1H102K CHIP C 1000PF K C408 CK73HB1H102K CHIP C 1000PF K C410 CK73FB1A47...

Page 17: ...1885 92 SMALL FIXED INDUCTOR 180NH L223 L40 2785 92 SMALL FIXED INDUCTOR 270NH L300 313 L92 0163 05 BEADS CORE L314 317 L92 0408 05 FERRITE CHIP L320 L92 0163 05 BEADS CORE L400 L92 0149 05 FERRITE CHIP L500 L92 0163 05 BEADS CORE L710 L34 4563 05 AIR CORE COIL X1 L77 1869 05 TCXO 16 8MH X200 L77 1760 15 CRYSTAL RESONATOR 44 395MHZ X300 L77 1810 05 CRYSTAL RESONATOR 9 8304MHZ X500 L77 1708 05 CRYS...

Page 18: ...29 RK73HB1J472J CHIP R 4 7K J 1 16W R230 R92 1368 05 CHIP R 0 OHM R232 RK73HB1J561J CHIP R 560 J 1 16W R233 RK73HB1J221J CHIP R 220 J 1 16W R234 237 RK73HB1J823J CHIP R 82K J 1 16W R238 R92 1368 05 CHIP R 0 OHM R240 241 RK73HB1J105J CHIP R 1 0M J 1 16W R242 RK73HB1J471J CHIP R 470 J 1 16W R243 RK73HB1J221J CHIP R 220 J 1 16W R244 RK73HB1J102J CHIP R 1 0K J 1 16W R245 RK73HB1J104J CHIP R 100K J 1 1...

Page 19: ... R404 RK73HB1J105J CHIP R 1 0M J 1 16W R405 R92 1252 05 CHIP R 0 OHM J 1 16W R406 RK73HB1J103J CHIP R 10K J 1 16W R407 RK73HB1J224J CHIP R 220K J 1 16W R408 RK73HB1J472J CHIP R 4 7K J 1 16W R409 RK73HB1J473J CHIP R 47K J 1 16W R410 411 R92 1368 05 CHIP R 0 OHM R413 RK73HB1J105J CHIP R 1 0M J 1 16W R414 RK73HB1J103J CHIP R 10K J 1 16W R500 R92 1368 05 CHIP R 0 OHM R501 RK73HH1J913D CHIP R 91K D 1 1...

Page 20: ...C IC313 TDA7053AT BI POLAR IC IC400 XC61CN4202NR MOS IC IC401 XC6204B502MR MOS IC IC402 XC62GR5012PR MOS IC IC403 XC6204B502MR MOS IC IC404 XC61CN5002NR MOS IC IC500 TC35453F MOS IC IC501 TC75W51FU MOS IC Q1 2SC5108 Y TRANSISTOR Q2 3 2SK508NV K52 FET Q4 2SJ347 FET Q5 2SC5108 Y TRANSISTOR Q6 RN47A4 TRANSISTOR Q7 2SC4617 S TRANSISTOR Q8 2SC5108 Y TRANSISTOR Q100 2SC5108 Y TRANSISTOR Q101 2SC5192 TRA...

Page 21: ...ded numbers larger than 700 are not supplied 61 TX RX UNIT A 3 60 700 63 62 54 1 30 35 33 G 9 SP 26 40 38 G G G G G G G G G G 27 25 32 43 72 8 36 42 55 71 70 50 52 51 41 28 34 31 19 18 41 C C 15 16 44 701 D D 702 11 56 20 21 17 6 F E E 37 28 B 39 SUB PCB 3 ...

Page 22: ...D 1 2 3 45 Item carton case H52 1811 02 53 Belt hook J29 0688 05 10 Instruction manual B62 1476 10 A Dressed screw accessory N08 0548 04 7 Cap B09 0625 03 703 Parts with the exploded numbers larger than 700 are not supplied ...

Page 23: ...ful if ammeter equipped The following parts are required for adjustment 1 Antenna connector adapter The antenna connector of this radio uses an SMA terminal Use an antenna connector adapter SMA f BNC f for adjustment The adapter is not provided as an option so buy a commercially available one Note When the antenna connector adapter touches the knob draw out the knob to mount the connector Caution ...

Page 24: ...nerator 10µ 10V PCB layout Shield AF voltmeter Audio generator 100 µ 10 V 100 µ 10 V 10 µ 10 V 16 Ω SW1 CN303 CN304 CN305 CN306 PTT WHITE MIC BLUE MIC WHITE SP BLUE SP WHITE SW1 RED SW2 WHITE GND BLUE SW2 GND PTT Removing the front panel After removing the battery pack knobs and antenna remove the 2 screws from the back of the transceiver Lift the chassis away from the bottom part gently then pull...

Page 25: ...rs CN301 CN302 CN400 How to assemble the antenna connector and its terminal The antenna connector and its terminal are supplied as separate parts When replacing the antenna connector and or terminal assemble the parts prior to the replacement 1 Mount the antenna connector onto the chassis Double sided adhesive tape is attached to the terminal peel off the tape cover Attach the terminal to the ante...

Page 26: ...LED Lights when there is a carrier Sub LCD indicator FCN appears at Function ON n appears at Narrow ON Frequency and signalling The set has been adjusted for the frequencies shown in the following table When required re adjust them following the adjustment procedure to obtain the frequencies you want in actual operation Frequency MHz Channel No K RX TX 1 155 05000 155 10000 2 136 05000 136 10000 3...

Page 27: ...S Sensitivity C A L LPOW Low Power Low C L2 LPOW Low Power Low 2 C C LPOW Low Power Cen C H2 LPOW Low Power Hi 2 C H LPOW Low Power Hi L MAX Max deviation W L C C MAX Max deviation W C C H MAX Max deviation W H L BAL DQT balance W L C C BAL DQT balance W C C H BAL DQT balance W H L FQT Fine QT W L C C FQT Fine QT W C C H FQT Fine QT W H L FDQT Fine DQT W L C C FDQT Fine DQT W C C H FDQT Fine DQT W...

Page 28: ...al Unit Parts Method Remark ADJUSTMENT 1 Frequency 1 Adj item FREQ Power meter Panel ANT Panel Encoder Center frequency Adjust Adjust Am meter knob 100Hz PTT ON Note After replacing the VCXO X1 align using KPG 74D 2 Hight Power 1 Adj item HPOW Encoder K 4 8W 0 1W Adjust Adjust knob 2 0A or less 2 Adj item L HPOW L2 HPOW C HPOW H2 HPOW H HPOW Adjust PTT ON 3 Hight Power Panel Test Mode K 4 5 5 1W C...

Page 29: ...v meter filter LPF 15kHz HPF OFF 2 Adj item L MAX C MAX H MAX Adjust PTT ON Narrow 1 Adj item n MAX 1 75kHz Adjust According to PTT ON the larger 8 MIC Panel Test Mode Check Wide 2 4 3 6kHz Sensitivity 1 CH Sig 1 1 Narrow 1 0 2 2kHz Check AG 1kHz Wide 15mV Narrow 16mV LPF 15kHz PTT ON 9 QT Deviation 1 Adj item FQT Power meter Panel ANT Panel Encoder Wide 0 75kHz 50Hz Adjust Adjust Dev meter univer...

Page 30: ...de 1 0kHz 0 1kHz Deviation Adjust Narrow 0 75kHz Adjust LPF 15kHz Wide HPF OFF PTT ON Narrow 2 Adj item n FMSK Adjust PTT ON 14 TONE 1 Adj item TONE Wide 3 0kHz 0 1kHz Deviation Adjust Narrow 1 5kHz Adjust LPF 15kHz Wide HPF OFF PTT ON Narrow 2 Adj item n TONE Adjust PTT ON 15 BATT 1 Adj item BATT Power meter Panel ANT Panel Encoder After pressing BATT terminal Detection Adjust DVM BATT knob the P...

Page 31: ...j item O SQL Encoder Adjust to point Adjust Adjust knob of opening Open 2 Adj item squelch L OSQL C OSQL H OSQL Adjust SSG OUT 12dB SINAD level 3 Adj item n OSQL Adjust SSG OUT 12dB SINAD level 4 Squelch Panel Test Mode Check Squelch must Check 1 CH Sig 1 1 be opened Open SSG OUT 12dB SINAD level 2 SSG OUT OFF Squelch must be closed 5 Squelch 1 Adj item T SQL Encoder Adjust to point Adjust Adjust ...

Page 32: ...UX key input 3 GND GND 4 5M 5V 5 VOL I Volume level input for audio control 6 CH1 I Encoder pulse input 7 CH2 I Encoder pulse input 8 GND GND 9 CH3 I Encoder pulse input 10 CH4 I Encoder pulse input 11 SB I Power input after passing through the fuse 12 SB I Power input after passing through the fuse 13 B O Power output after power switch 14 B O Power output after power switch CN300 1 XOUT O 3 5895...

Page 33: ...ide Pattern 1 Pattern 2 Pattern 3 Pattern 4 5TC MMUTE 5CNS AFSTB AFREG1 AFREG2 AFDET CLK AFMSKE AFTRD AFRTM AFRDT AFCLR GND XOUT C555 C554 R501 R503 R507 R502 C501 C502 C503 C504 S600 PTT S601 SW1 S602 SW2 CN500 1 15 16 30 5C GND MICI PTT ME ME TXHSD GND TXAF RXAFI 5RC HSDIN RXAFO GND GND J72 0806 09 B 3 J72 0806 09 C 3 Pattern 5 Pattern 6 ...

Page 34: ...0 CP500 CP501 1 11 12 22 23 33 34 44 C506 C516 C542 C518 C514 C511 C521 C526 C529 C532 C538 R500 R509 R512 R511 R513 R516 R518 R526 Q500 IC501 1 4 5 8 D501 C530 R525 R529 R528 R523 R519 C527 C528 C543 C536 SW2 GND PTT SW1 o N f e R s s e r d d A 0 0 5 C I F 6 1 0 5 C I G 9 0 0 5 Q D 8 1 0 5 Q H 6 2 0 5 Q H 8 1 0 5 D H 8 TX RX UNIT X57 6400 10 TC35453F 1 11 12 22 23 33 34 44 TC75W51FU 5 8 1 4 DTC14...

Page 35: ...XAFO GND GND J72 0806 09 B 3 J72 0806 09 C 3 X500 R515 C515 IC500 C557 C556 C519 R506 R505 R508 R510 R514 R517 R537 R533 R532 R522 R521 R530 R531 R520 Q501 1 3 4 6 R524 R527 R504 C507 C508 C500 C509 C510 C513 C520 C537 C541 Q502 D S G C524 C512 C517 C522 C523 C539 C535 C531 C525 C540 C533 C534 L500 CP500 CP501 1 11 12 22 23 33 34 44 C506 C516 C542 C518 C514 C511 C521 C526 C529 C532 C538 R500 R509 ...

Page 36: ...R126 R138 R606 R608 R609 R610 R611 R613 R603 C312 R369 R376 R386 R349 R346 R344 R345 L300 R365 R390 R310 R317 TH300 L305 C350 C369 C340 C335 C310 IC302 1 4 5 8 Q304 R148 Q104 Q105 Q107 Q108 R132 R125 TH1 R29 R120 1 14 B B SB SB EN4 EN3 GND EN2 EN1 VOL 5M GND AUXKEY S DET 1 14 GND VCC CS SCLK SID SOD VEE SKEY AKEY BKEY CKEY LEDA LEDK NC R119 R359 R391 C420 C417 C422 Q403 IC402 Q404 Q405 G S D 1 3 4...

Page 37: ...L100 Q203 Q204 S G D S G D C222 C29 C38 C42 C56 C119 C132 C161 C141 C152 C154 C145 D102 D103 C125 L106 L107 L108 L110 L114 L112 L120 L217 C41 C39 C40 C43 C35 TC2 C37 C34 C47 C33 C32 C53 C51 C62 C57 D7 L13 D1 Q8 Q5 D6 Q7 Q3 Q2 D2 D9 G G S S D D TC1 D209 D100 C206 IC307 1 12 13 24 R208 R326 R393 R320 C391 R331 R211 Q201 IC305 1 4 5 8 R328 R329 C330 C209 C220 C201 C283 C200 C282 C396 C332 C334 C333 R...

Page 38: ... L21 L14 L9 R303 R307 R327 R325 R334 R10 R12 C12 C61 L1 L4 L7 R9 R4 R305 C307 R338 R337 R204 TH200 D300 IC300 IC201 IC1 1 1 10 11 20 4 5 8 1 4 5 8 R217 R219 R207 R341 R343 R398 R209 R210 D202 C318 C331 C320 C324 C215 C204 C207 C284 C304 C14 C28 C26 C21 C253 C302 C730 C316 C319 C325 C398 C275 C208 C205 C255 C279 C202 C203 C217 C216 C214 C210 C224 C280 C213 C211 C233 C221 C223 C271 C227 C219 Q205 C2...

Page 39: ...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 TK 2140 SCHEMATIC DIAGRAM Note Component marked with a dot are parts of pattern1 ...

Page 40: ...er In the RF section use a 1000pF coupling ca pacitor 47 48 Circuit Description Charger Flow chart Power on LED off Initialization Are output terminals shorted Battery insert LED color Red Not sensing for 3sec Is the battery abnormal Shorted Fast charge LED color Red 1200mA 5 Ni Cd Ni MH Constant current charging Not sensing for 4min Red LED flash Abnormal reset Is the each terminal to short anoth...

Page 41: ...er In the RF section use a 1000pF coupling ca pacitor 47 48 Circuit Description Charger Flow chart Power on LED off Initialization Are output terminals shorted Battery insert LED color Red Not sensing for 3sec Is the battery abnormal Shorted Fast charge LED color Red 1200mA 5 Ni Cd Ni MH Constant current charging Not sensing for 4min Red LED flash Abnormal reset Is the each terminal to short anoth...

Page 42: ...B11 C36 C38 C33 C37 B22 R8 Q1 R4 R6 J01 C30 C21 C22 R7 R30 R5 R34 U4 1 7 8 14 R32 R33 R45 R31 J12 J08 J09 J13 J10 J11 B16 C31 R26 Q3 D1 R3 R2 B8 B18 C11 C27 R46 R37 R36 R38 R42 B17 C24 B7 B6 B5 B9 B19 U5 1 4 5 8 B20 B21 R35 C13 R39 R16 R13 R18 R25 C9 C25 R21 B10 C3 R49 J06 J07 C10 R22 Q4 J03 R28 C35 C34 C29 R10 R9 R41 C23 C17 J14 B14 B15 C12 J16 J15 R40 C15 C32 B3 B1 B2 C28 J04 CHARGER UNIT W02 36...

Page 43: ...K R16 3K R14 100K R18 100K R17 10K R19 470 J06 0 J07 0 D4 B1 B2 B3 B4 D5 C32 C26 102P C8 104P C7 220 16V D2 D3 200 R15 0 1 C6 103P C9 103P C25 102P C29 102P C28 102P C11 104P L1 330µ 2 1 3 16 14 C36 R49 10 U3 Q4 CHB VDD XO R XI VSS U2 CVB ICTRL1 ICTRL2 SCTRL PWR PER B15 C12 101P B14 B20 B18 C17 101P B17 B19 B21 J12 0 R44 5 1K J13 0 J14 0 J16 0 J15 0 R31 300K 2 J08 0 Vcc Vcc Vcc ICHG BTYPE BATB FAS...

Page 44: ...02 3656 08 Cabinet BOTTOM B43 1141 08 Badge B62 1607 00 Instruction manual E03 0200 08 DC jack E23 1190 08 Relay terminal G13 1547 08 Cushion N80 2610 45 Screw W02 3641 08 Charger unit W08 0942 05 AC adapter 120VAC 60HZ KNB 24L KNB 25A KNB 26N Li ion Battery Pack 1400mAh Ni Cd Battery pack 1200mAh Ni MH Battery pack 2000mAh KSC 25 S T S 1 8M S S T 560k S S T 220k KRA 22 VHF Helical Antenna DISCHAR...

Page 45: ...F3E 11K0F3E FM Noise Wide Narrow 45dB 40dB Audio Distortion Less than 3 Frequency Stability 0 00025 30 C to 60 C Channel Spread 38MHz K SPECIFICATION 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...

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