Kenwood TKR-740 Service Manual
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Kenwood TKR-740 Service Manual

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VHF FM REPEATER
TKR-740
SERVICE MANUAL
SUPPLEMENT
This service manual (B51-8828-00) applies to products with 909xxxxx(K, K2, K3), 804xxxxx(E), or subsequent serial numbers.
Refer to the TKR-740(K, K2, K3) service manual (B51-8505-00) or TKR-740(E) service manual (B51-8642-00) for any information
which has not been covered in this service manual.
GENERAL ................................................................ 2
DISASSEMBLY FOR REPAIR ................................. 2
COMPONENTS DESCRIPTION .............................. 6
PARTS LIST ........................................................... 10
EXPLODED VIEW .................................................. 30
PACKING ............................................................... 34
SEMICONDUCTOR DATA .................................... 35
This product complies with the RoHS directive for the European market.
Panel (Front)
LED
(A62-0726-13)
(B30-2197-05)
LED
(B30-0864-05)
CONTENTS
SCHEMATIC DIAGRAM ........................................ 64
SPECIFICATIONS .................................................. 81
©
2008-3 PRINTED IN JAPAN
B51-8828-00 (S) 665
PUSH KNOB (TEST)
(K29-3002-14)
LED ASSY
(LA301DB(N))
LED
KNOB (VOL)
(B30-2198-05)
(K29-4539-04)
CONTROL UNIT (X53-4210-10) ...................... 36
RX UNIT (X55-308X-XX) ................................. 44
TX UNIT (X56-3140-10):K, K2, K3 ................... 48
TX UNIT (X56-3102-70):E ................................ 56
This product uses Lead Free solder.
MODULAR JACK
(E58-0526-05)

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  • Page 1: Table Of Contents

    This service manual (B51-8828-00) applies to products with 909xxxxx(K, K2, K3), 804xxxxx(E), or subsequent serial numbers. Refer to the TKR-740(K, K2, K3) service manual (B51-8505-00) or TKR-740(E) service manual (B51-8642-00) for any information which has not been covered in this service manual.

  • Page 2: General

    Kenwood reserves the right to make changes to any Kenwood. products herein at any time for improvement purposes.
  • Page 3 TKR-740 DISASSEMBLY FOR REPAIR 2. Compatibility information for the Control unit, RX unit and TX unit ■ The change of the Control, RX, TX units number with the change of the PLL IC. With the PLL IC change (from SA7025 to LMX2352TMX/...
  • Page 4 TKR-740 DISASSEMBLY FOR REPAIR ■ Compatibility information 1. Another RX or TX unit also needs to be replaced with There are some important notices when you replace the Control, RX and TX units. TYPE B. *3 If you need to change either the RX or TX unit from TYPE 2.
  • Page 5 R201 is for OLD RX and TX unit combination. urgently. However it is required the pattern cut. Kenwood The steps below are required to use this NEW CONTROL recommends using a NEW CONTROL unit.

  • Page 6: Components Description

    TKR-740 COMPONENTS DESCRIPTION CONTROL UNIT (X53-4210-10) Ref. No. Part Name Description Ref. No. Part Name Description D700,701 LED ASSY 7 SEGMENT MULTIPLEXER D702 REFERENCE D703 POWER IC3~6 FLASH ROM D704 IC10 VOLTAGE DETECTOR D705 BUSY D706 DIODE SURGE PROTECTOR IC12,13...
  • Page 7 TKR-740 COMPONENTS DESCRIPTION Ref. No. Part Name Description Ref. No. Part Name Description TRANSISTOR BUFFER AMP IC206 INVERTER TRANSISTOR DC SWITCH IC302 DC AMP TRANSISTOR RIPPLE FILTER IC303 DC AMP/COMPARATOR Q18~20 TRANSISTOR DC SWITCH IC304 ANALOG SWITCH TRANSISTOR DC SWITCH...
  • Page 8 TKR-740 COMPONENTS DESCRIPTION TX UNIT (X56-3102-70):E type Ref. No. Part Name Description Q305 TRANSISTOR DC SWITCH Ref. No. Part Name Description Q306 TRANSISTOR DC AMP IC1,2 Q307 TRANSISTOR DIFFERENTIAL AMP D/A CONVERTER Q308 TRANSISTOR DC SWITCH SHIFT REGISTER Q309 TRANSISTOR...
  • Page 9 TKR-740 COMPONENTS DESCRIPTION Ref. No. Part Name Description Q107~109 TRANSISTOR RF AMP Q110 TRANSISTOR DC SWITCH Q112,113 DC SWITCH Q114 TRANSISTOR DC SWITCH Q115 TRANSISTOR RF AMP Q201 TRANSISTOR VCO OSC Q202 TRANSISTOR BUFFER AMP Q203 DC SWITCH Q205 TRANSISTOR...

  • Page 10: Parts List

    E: Europe Les articles non mentionnes dans le Parts No. ne sont pas fournis. Y: AAFES (Europe) X: Australia M: Other Areas Teile ohne Parts No. werden nicht geliefert. TKR-740 (Y54-314X-XX) Ref. No. Address Parts No. Description Destination Ref. No.
  • Page 11 TKR-740 PARTS LIST TKR-740 (Y54-314X-XX) CONTROL UNIT (X53-4210-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts J21-8375-04 MOUNTING HARDWARE(FINAL:TS301) CK73GB1E103K CHIP C 0.010UF K K01-0421-05 HANDLE ACCESSORY CK73GB1H472K CHIP C 4700PF K...
  • Page 12 TKR-740 PARTS LIST CONTROL UNIT (X53-4210-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C185-187 CK73GB1E103K CHIP C 0.010UF K E40-6654-05 PIN ASSY C188 CC73GCH1H030C CHIP C 3.0PF E40-6653-05 PIN ASSY ∗...
  • Page 13 TKR-740 PARTS LIST CONTROL UNIT (X53-4210-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts RK73GB2A000J CHIP R J 1/10W R190 RK73GB2A473J CHIP R J 1/10W RK73GB2A104J CHIP R 100K J 1/10W R191...
  • Page 14 TKR-740 PARTS LIST CONTROL UNIT (X53-4210-10) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts R290 RK73GB2A101J CHIP R J 1/10W D3 -22 DA204U DIODE R291 RK73GB2A472J CHIP R 4.7K J 1/10W D24 -28...
  • Page 15 TKR-740 PARTS LIST CONTROL UNIT (X53-4210-10) RX UNIT (X55-308X-XX) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts Q706 DTA114EUA DIGITAL TRANSISTOR CC73GCH1H050C CHIP C 5.0PF CK73GB1H102K CHIP C 1000PF K K,K2,E Q707...
  • Page 16 TKR-740 PARTS LIST RX UNIT (X55-308X-XX) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C220 CC73GCH1H220J CHIP C 22PF C138 CK73GB1C333K CHIP C 0.033UF K C220 CC73GCH1H270J CHIP C 27PF C139 CC73GCH1H680J...
  • Page 17 TKR-740 PARTS LIST RX UNIT (X55-308X-XX) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts L17 ,18 L41-1005-33 SMALL FIXED INDUCTOR(10UH) RK73GB2A102J CHIP R 1.0K J 1/10W L41-4775-33 SMALL FIXED INDUCTOR(0.047UH) RK73GB2A122J CHIP R 1.2K...
  • Page 18 TKR-740 PARTS LIST RX UNIT (X55-308X-XX) Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts RK73GB2A680J CHIP R J 1/10W R163 RK73GB2A102J CHIP R 1.0K J 1/10W RK73GB2A152J CHIP R 1.5K J 1/10W...
  • Page 19 TKR-740 PARTS LIST RX UNIT (X55-308X-XX) TX UNIT (X56-3140-10) : K, K2, K3 Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts IC21 TC7S66FUF MOS-IC CK73GB1H102K CHIP C 1000PF K IC301 LMX2352TMX/NP ANALOGUE IC...
  • Page 20 TKR-740 PARTS LIST TX UNIT (X56-3140-10) : K, K2, K3 Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C136 CS77BA0J470M CHIP TNTL 47UF 6.3WV C264 CC73GCH1H560J CHIP C 56PF C138 CS77BA0J470M CHIP TNTL 47UF 6.3WV...
  • Page 21 TKR-740 PARTS LIST TX UNIT (X56-3140-10) : K, K2, K3 Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C351 CS77AA1A4R7M CHIP TNTL 4.7UF 10WV L204 L41-1015-33 SMALL FIXED INDUCTOR(100UH) C352 CK73GB1H102K CHIP C...
  • Page 22 TKR-740 PARTS LIST TX UNIT (X56-3140-10) : K, K2, K3 Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts RK73GB2A102J CHIP R 1.0K J 1/10W R142 RK73GB2A104J CHIP R 100K J 1/10W RK73GB2A393J...
  • Page 23 TKR-740 PARTS LIST TX UNIT (X56-3140-10) : K, K2, K3 Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts R269 RK73GB2A102J CHIP R 1.0K J 1/10W R501-507 RK73GB2A101J CHIP R J 1/10W R270,271...
  • Page 24 TKR-740 PARTS LIST TX UNIT (X56-3140-10) : K, K2, K3 TX UNIT (X56-3102-70) : E Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts 2SK1824-A CK73GB1H103K CHIP C 0.010UF K 2SC3120-F TRANSISTOR CC73FCH1H080B CHIP C 8.0PF...
  • Page 25 TKR-740 PARTS LIST TX UNIT (X56-3102-70) : E Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts ∗ C127 CS77AB21A470M CHIP TNTL 47UF 10WV C251-253 CK73GB1H102K CHIP C 1000PF K C128 CK73FB1E104K CHIP C 0.10UF K...
  • Page 26 TKR-740 PARTS LIST TX UNIT (X56-3102-70) : E Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts C353 C93-0603-05 CHIP C 1000PF K L203 L41-1595-33 SMALL FIXED INDUCTOR(1.5UH) C354 CK73GB1H102K CHIP C 1000PF K...
  • Page 27 TKR-740 PARTS LIST TX UNIT (X56-3102-70) : E Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts RK73GB2A470J CHIP R J 1/10W R141 RK73GB2A102J CHIP R 1.0K J 1/10W RK73GB2A102J CHIP R 1.0K...
  • Page 28 TKR-740 PARTS LIST TX UNIT (X56-3102-70) : E Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts R269 RK73GB2A102J CHIP R 1.0K J 1/10W D204 1SS355 DIODE R270,271 RK73PB2H220J CHIP R J 1/2W...
  • Page 29 TKR-740 PARTS LIST TX UNIT (X56-3102-70) : E Ref. No. Address Parts No. Description Destination Ref. No. Address Parts No. Description Destination parts parts Q201,202 2SC4215-F(Y) TRANSISTOR Q203 2SK1824-A Q205 2SC4215-F(Y) TRANSISTOR Q206 2SK1824-A Q207 DTC114EUA DIGITAL TRANSISTOR Q208 2SK1824-A...

  • Page 30: Exploded View

    TKR-740 EXPLODED VIEW (K, K2, K3 TYPE) E x 2 N x 10 J x 12 F x 2 X56 (B/3) IC601 J x 7 J x 7 X56 (A/3) G x 2 X53 (A/4) IC45 J x 3 X53 (B/4)
  • Page 31 TKR-740 EXPLODED VIEW (K, K2, K3 TYPE) C x 10 EXCITER C x 11 C x 10 FINAL C x 14 CONTROL K x 2 C x 3 B x 2 N x 10 X56 (C/3) J x 11 C x 3...
  • Page 32 TKR-740 EXPLODED VIEW (E TYPE) Ex 2 N x 10 Jx 12 I x 2 X56 (B/3) IC601 Jx 6 Jx 7 X56 (A/3) Gx 2 Mx 2 X53 (A/4) IC45 Jx 3 X53 (B/4) Jx 2 Dx 2 Jx 2...
  • Page 33 TKR-740 EXPLODED VIEW (E TYPE) C x 10 EXCITER C x 11 C x 10 FINAL CONTROL C x 14 K x 2 C x 3 B x 2 N x 10 X56 (C/3) Jx 11 C x 3 A :N08-0560-04...

  • Page 34: Packing

    TKR-740 PACKING A. DRESSED SCREW (N08-0560-04) 6. INSTRUCTION MANUAL 22.FUSE (BLADE TYPE) (B62-1136-00):K, K2, K3 (F06-4027-05):K, K2, K3 (4A) (B62-1700-00):E (F06-1032-05):E (10A) 43.PROTECTION BAG (H25-0029-04) 21.RECTANGULAR PLUG 2. FRONT GLASS (E59-0404-05) (B10-2590-04) 20.LEAD WIRE WITH CONNECTOR (E37-1381-05) 48.HANDLE 44.PROTECTION BAG...

  • Page 35: Semiconductor Data

    TKR-740 SEMICONDUCTOR DATA MAIN CPU : 30622M4-103GPU (CONTROL UNIT IC17) Pin No. Port name I/O Function ■ Pin function HLDA Not used BCLK Sub CPU clock output Pin No. Port name I/O Function Flash memory/Sub CPU RD bus HSDO High speed data output...
  • Page 36 TKR-740 PC BOARD CONTROL UNIT (X53-4210-10) (A/4) Component side view (J79-0034-19 A/4) R306 R305 C303 R155 C313 R304 C302 R303 C301 R302 C300 RSSI RSSI C68 + C147 IC13 SPG 14 C207 C210 R124 R123 C125 R329 C160 R100 R196...
  • Page 37 TKR-740 PC BOARD CONTROL UNIT (X53-4210-10) (A/4) Component side view (J79-0034-19 A/4) CN707 IC45 DETO DETI CHECK C210 C166 IC27 R351 R291 R181 C202 IC25 C229 R176 IC30 R295 R171 R350 C180 R349 1 SPI R118 IC24 C182 CODE4 IC37...
  • Page 38 TKR-740 PC BOARD CONTROL UNIT (X53-4210-10) (A/4) Foil side view (J79-0034-19 A/4) R164 C154 C184 R165 C107 IC38 C14 + C213 R166 IC22 C161 C162 C206 R168 C106 C158 C209 C208 C170 C169 C135 R110 R161 R262 R182 R159 C179...
  • Page 39 TKR-740 PC BOARD CONTROL UNIT (X53-4210-10) (A/4) Foil side view (J79-0034-19 A/4) R307 R125 IC14 C212 C213 C209 C203 C208 C194 + C187 IC46 IC10 R237 R158 IC48 IC47 C153 R138 R140 R146 R145 R147 C140 C177 R148 C138 R130...
  • Page 40 TKR-740 PC BOARD CONTROL UNIT (X53-4210-10) (B/4) Component side view (J79-0034-19 B/4) CN703 CN702 C738 C725 IC703 D705 D704 D703 EX REF INT REF BUSY D702 J79-0034-19 B/4 Ref. No. Address Ref. No. Address IC23 D703 IC703 D704 IC706 D705...
  • Page 41 TKR-740 PC BOARD CONTROL UNIT (X53-4210-10) (B/4) Component side view (J79-0034-19 B/4) 2 SW6 MDAT C738 D710 C724 C725 IC703 Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side CONTROL UNIT (X53-4210-10) (B/4) Foil side view (J79-0034-19 B/4)
  • Page 42 TKR-740 PC BOARD CONTROL UNIT (X53-4210-10) (C/4) Component side view (J79-0034-19 C/4) J79-0034-19 C/4 14 NC MDAT R716 VR700 C750 C714 C716 + R718 J700 Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side CONTROL UNIT (X53-4210-10) (C/4)
  • Page 43 TKR-740 PC BOARD CONTROL UNIT (X53-4210-10) (D/4) Component side view (J79-0034-19 D/4) C706 C707 GND 6 D700 D701 J79-0034-19 D/4 Component side Ref. No. Address Layer 1 D700 Layer 2 D701 Layer 3 Layer 4 Foil side CONTROL UNIT (X53-4210-10) (D/4)
  • Page 44 TKR-740 PC BOARD RX UNIT (X55-308X-XX) 0-11 : K 0-12 : K3 2-71 : K2,E Component side view (J79-0036-09) R107 C123 C124 + C127 R103 R109 C129 R121 R114 R111 R193 R118 C142 C138 REF IN IC16 R115 R126 C150...
  • Page 45 TKR-740 PC BOARD RX UNIT (X55-308X-XX) 0-11 : K 0-12 : K3 2-71 : K2,E Component side view (J79-0036-09) R120 Component side Layer 1 C217 Layer 2 Foil side C10 + RX IN C221 C222 J79-0036-09 dress Ref. No. Address Ref.
  • Page 46 TKR-740 PC BOARD RX UNIT (X55-308X-XX) 0-11 : K 0-12 : K3 2-71 : K2,E Foil side view (J79-0036-09) Component side IC19 C126 Layer 1 C133 Layer 2 C134 Foil side IC302 C404 R180 C84 + R179 IC17 J79-0036-09 Ref. No. Address Ref.
  • Page 47 TKR-740 PC BOARD RX UNIT (X55-308X-XX) 0-11 : K 0-12 : K3 2-71 : K2,E Foil side view (J79-0036-09) IC10 R151 IC302 C404 C391 IC301 R169 R175 R176 R394 C306 C228 R196 C147 IC11 C160 R166 R168 C213 + C112...
  • Page 48 TKR-740 PC BOARD TX UNIT (X56-3140-10) (A/3) : K,K2,K3 Component side view (J79-0169-09 A/3) R182 R222 Q208 R149 R183 MAIN PLL DRV OUT D206 R270 R123 C104 C102 R113 C258 GND 1 R517 C107 C507 C506 C111 R271 R507 MAIN...
  • Page 49 TKR-740 PC BOARD TX UNIT (X56-3140-10) (A/3) : K,K2,K3 Component side view (J79-0169-09 A/3) R222 D503 R592 C594 SUB PLL R591 R590 IC305 D202 C220 L247 L209 L204 R205 D201 C252 C209 D203 R228 C128 C245 R204 L240 R130 C212...
  • Page 50 TKR-740 PC BOARD TX UNIT (X56-3140-10) (A/3) : K,K2,K3 Foil side view (J79-0169-09 A/3) C124 C125 R251 C291 L243 R185 C254 C290 R269 C287 Q207 R221 Q110 C232 C296 Q113 C529 R241 R211 Q114 C147 R587 C216 C213 R580 C504...
  • Page 51 TKR-740 PC BOARD TX UNIT (X56-3140-10) (A/3) : K,K2,K3 Foil side view (J79-0169-09 A/3) R257 R258 R509 C504 C505 R511 R512 R510 C172 C171 R109 C108 R219 Q203 C133 R138 IC110 R139 C136 R141 R147 C138 C131 J79-0169-09 A/3 Component side...
  • Page 52 TKR-740 PC BOARD TX UNIT (X56-3140-10) (B/3) : K,K2,K3 Component side view (J79-0169-09 B/3) CN302 C323 C301 C325 C421 R320 R323 R332 C317 C329 IC303 R306 D304 R308 R333 IC302 R301 Q308 TH301 R350 R343 C342 C350 R313 R316 R314...
  • Page 53 TKR-740 PC BOARD TX UNIT (X56-3140-10) (B/3) : K,K2,K3 Component side view (J79-0169-09 B/3) Ref. No. Address R303 R358 IC302 R359 C324 IC303 CN301 R304 DRV IN C325 IC304 IC601 R325 Q301 Q305 R324 Q302 D317 Q304 C345 L306 R306...
  • Page 54 TKR-740 PC BOARD TX UNIT (X56-3140-10) (B/3) : K,K2,K3 Foil side view (J79-0169-09 B/3) C326 C302 C305 C304 C332 C340 R330 C339 C315 C316 Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side...
  • Page 55 TKR-740 PC BOARD TX UNIT (X56-3140-10) (B/3) : K,K2,K3 Foil side view (J79-0169-09 B/3) C414 TX UNIT (X56-3140-10) (C/3) : K,K2,K3 Foil side view (J79-0169-09 C/3) J79-0169-09 B/3 J79-0169-09 C/3 Ref. No. Address D500 D500...
  • Page 56 TKR-740 PC BOARD TX UNIT (X56-3102-70) (A/3) : E Component side view (J79-0037-09 A/3) R182 R222 Q208 R149 R183 MAIN PLL DRV OUT D206 R270 R123 C104 C102 R113 C258 GND 1 R517 C107 C507 C506 C111 R271 R507 MAIN...
  • Page 57 TKR-740 PC BOARD TX UNIT (X56-3102-70) (A/3) : E Component side view (J79-0037-09 A/3) R222 D503 R592 C594 SUB PLL R591 R590 IC305 D202 C220 L247 L209 L204 R205 D201 C252 C209 D203 R228 C128 C245 R204 L240 R130 C212...
  • Page 58 TKR-740 PC BOARD TX UNIT (X56-3102-70) (A/3) : E Foil side view (J79-0037-09 A/3) C124 C125 R251 C291 L243 R185 C254 C290 R269 C287 Q207 R221 Q110 C232 C296 Q113 C529 R241 R211 Q114 C147 R587 C216 C213 R580 C504...
  • Page 59 TKR-740 PC BOARD TX UNIT (X56-3102-70) (A/3) : E Foil side view (J79-0037-09 A/3) R257 R258 R509 C504 C505 R511 R512 R510 C172 C171 R109 C108 R219 Q203 C133 R138 IC110 R139 C136 R141 R147 C138 C131 J79-0037-09 A/3 Component side...
  • Page 60 TKR-740 PC BOARD TX UNIT (X56-3102-70) (B/3) : E Component side view (J79-0037-09 B/3) CN302 C301 L308 C325 C420 R320 C317 C329 IC303 R306 D304 R308 IC302 R301 Q308 TH301 R313 R316 R314 L304 D305 L305 D303 CN308 1 GND...
  • Page 61 TKR-740 PC BOARD TX UNIT (X56-3102-70) (B/3) : E Component side view (J79-0037-09 B/3) R303 R358 R359 R304 Ref. No. Address C324 CN301 C325 IC302 DRV IN IC303 C420 IC601 R325 Q301 R324 D320 Q302 Q304 R306 C430 D304 Q301...
  • Page 62 TKR-740 PC BOARD TX UNIT (X56-3102-70) (B/3) : E Foil side view (J79-0037-09 B/3) C326 C302 C305 C304 C332 R330 C315 C316 Component side Layer 1 Layer 2 Layer 3 Layer 4 Foil side...
  • Page 63 TKR-740 PC BOARD TX UNIT (X56-3102-70) (B/3) : E Foil side view (J79-0037-09 B/3) C414 TX UNIT (X56-3102-70) (C/3) : E Foil side view (J79-0037-09 C/3) J79-0037-09 B/3 J79-0037-09 C/3 Ref. No. Address D500 D500...
  • Page 64 TKR-740 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4210-10)(A/4) C181 10u10 C186 4.8V CHECK 0.01u C213 IC48 TC7S32FU-F C210 IC46-48 220u6.3 OR GATE FLASH ROM 4.8V AT29C02090TU 4.5V CHECK R218 R157 R226 R225 BYTE CNVss R161 R262 SRST Vout 4.7V 4.8V IC18 BCLK...
  • Page 65 TKR-740 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4210-10)(A/4) C202 470p C229 0.01u R349 R344 R350 R351 C223 C224 C225 IAD3 IAD4 BEAT SHIFT IAD3 IAD5 IAD4 2SK1824-A IAD5 IAD6 IAD6 IAD7 R343 IAD7 IAD8 4.7k IAD8 C228 IAD9 R345 IAD9 IAD10 470p...
  • Page 66 TKR-740 SCHEMATIC DIAGRAM CONTROL UNIT (X53-4210-10)(A/4) MDAT MDAT TEST TESTO TESTI TEST R116 PTTO PTTI R115 C1 0.01u C2 1u IC45 AF MUTE LA4422-E DTC363EU MULTIPLEXER AF POWER AMP TC7S66FUF 1.2V 5.0V 13.0V 7.1V 1.2V DTC114EUA 11.5V 6.5V INVERTER 47u25...
  • Page 67 TKR-740 SCHEMATIC DIAGRAM ● Note : The components marked with a dot ( ) are parts of layer 1. CONTROL UNIT (X53-4210-10)(B/4) CN702 D703 Q706-710 POWER Q706 R706 DTA114EUA CURRENT DC SW PROTECTOR B30-2198-05 SHIFT IC703 REGISTER D704 IC704 MDAT...
  • Page 68 TKR-740 SCHEMATIC DIAGRAM CN10 RX UNIT (X55-308X-XX) 4.2V 0-11:146-153.995MHz 0-12:136-142.995MHz 2SC2873(Y)F 2-70:158-165.995MHz 0-11:154-162MHz 0-12:143-150MHz 2-70:166-174MHz 4.9V R179 1000p 7.3V RX IN RF AMP 0.01u IC17 DOUBLE AM1-G BALANCED RFIN RFoUT MIXER 1000p W02-1982-15 Q1,3,5 RF LOCAL AMP 2SC3357-A 2SC3120-F 0.9V 2SC3357-A 2.2k...
  • Page 69 TKR-740 SCHEMATIC DIAGRAM RX UNIT (X55-308X-XX) 44.85MHz NARROW 1.5k RF SW IF AMP R104 C120 C151 R185 120n 0.01u C113 R188 2SC3357-A 0.01u DAN235K R190 0.01u W:0V N:1V W:0V N:7.1V W:0V N:8.0V 8C N 44.85MHz WIDE 1.5k IF AMP R101...
  • Page 70 TKR-740 SCHEMATIC DIAGRAM RX UNIT (X55-308X-XX) R134 1.5k C178 IF AMP R158 W:0V SQ SW N:7.1V 4.7k 220p 2SC3357-A 2SJ106-F(GR) C179 R152 C193 C166 C168 220p W:0V 0.01u N:1.0V C180 W:0V N:1V R139 0.1u R159 2.7k R130 FM IF IC...
  • Page 71 TKR-740 SCHEMATIC DIAGRAM ● Note : The components marked with a dot ( ) are parts of layer 1. RX UNIT (X55-308X-XX) R164 C181 R160 2SJ106-F(GR) 220p 4.7k SQ SW AF AMP C182 C194 R153 IC11 220p NJM4558E-ZB W:1V C183...
  • Page 72 TKR-740 SCHEMATIC DIAGRAM TX UNIT (X56-3140-10)(A/3):K,K2,K3 A:6.7V A:136-149.995MHz VCO-B 150MHz-174MHz VCO OSC B:6.5V B:150-174MHz BUFFER AMP 2SK508NV(K52) 1SV283F 2SC3120-F 0.8V D2,4 FREQ. CONTROL A:1.7V 5.9V B:0V DC SW 100k MODULATION 2SC3722K(S) 6.7V A:6.5V B:6.7V 100k 1000p RIPPLE FILTER MODULATION VCO OSC...
  • Page 73 TKR-740 SCHEMATIC DIAGRAM TX UNIT (X56-3140-10)(A/3):K,K2,K3 RF AMP 2SC3120-F R109 0.8V 1SV128-F RF AMP RF SW Q107 L244 2SC3120-F R588 C143 C119 220p D11,12 0.6V 6.0V Q8,11,12 CURRENT STEERING DC SW 2SB1386(R) IC205 8.0V 5.0V NJM78L05UA-ZB DC SW 470p R590...
  • Page 74 TKR-740 SCHEMATIC DIAGRAM TX UNIT (X56-3140-10)(A/3):K,K2,K3 RF AMP R259 2SK2596-E RF AMP 136MHz -174MHz 2SC3356-A (1/2W) DRV OUT 100p 470p 470p R222 R223 TX:4.0V R150 RX:0V 4.7k TX:7.0V RX:0V DC AMP IC203 NJM2904E-ZB RX:0.2V TX:7.9V R182 4.7k Lo TX:0V R183...
  • Page 75 TKR-740 SCHEMATIC DIAGRAM ● Note : The components marked with a dot ( ) are parts of layer 1. TX UNIT (X56-3140-10)(B/3):K,K2,K3 IC601 RA07M1317M101 POWER MODULE R359 C353 L301 L302 L303 CN308 1000p CN301 C302 R304 RF OUT DRV IN...
  • Page 76 TKR-740 SCHEMATIC DIAGRAM TX UNIT (X56-3102-70)(A/3):E A:6.7V A:136-149.995MHz VCO-B 150MHz-174MHz VCO OSC B:6.5V B:150-174MHz BUFFER AMP 2SK508NV(K52) 1SV283F 2SC3120-F 0.8V D2,4 FREQ. CONTROL A:1.7V 5.9V B:0V DC SW 100k MODULATION 2SC3722K(S) 6.7V A:6.5V B:6.7V RIPPLE 100k 1000p FILTER MODULATION VCO OSC...
  • Page 77 TKR-740 SCHEMATIC DIAGRAM TX UNIT (X56-3102-70)(A/3):E RF AMP 2SC3120-F R109 0.8V 1SV128-F RF AMP RF SW Q107 L244 R588 C143 C119 2SC3120-F 220p D11,12 0.6V 6.0V Q8,11,12 CURRENT STEERING DC SW 2SB1386(R) IC205 8.0V 5.0V NJM78L05UA-ZB 470p DC SW R590...
  • Page 78 TKR-740 SCHEMATIC DIAGRAM TX UNIT (X56-3102-70)(A/3):E RF AMP RF AMP R259 2SK2596-E 146MHz -174MHz 2SC3356-A (1/2W) DRV OUT 100p 470p 470p R222 R223 TX:4.0V R150 RX:0V RX:7.0V 4.7k TX:0V DC AMP IC203 NJM2904E-ZB RX:0.2V TX:7.9V R182 4.7k Lo TX:0V R183...
  • Page 79 TKR-740 SCHEMATIC DIAGRAM ● Note : The components marked with a dot ( ) are parts of layer 1. TX UNIT (X56-3102-70)(B/3):E IC601 RA30H1317M131 POWER MODULE R359 CN308 C353 CN301 C302 R304 L301 L302 L303 RF OUT DRV IN 1000p...
  • Page 80 TKR-740 MEMO ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○...
  • Page 81 Audio distortion ..............Less than 0.5% at 1000Hz Spurious and emission ............. 70dB FM Noise ................Wide : 55dB, Narrow : 50dB KENWOOD follows a policy of continuous advancement in development. For this reason specifications may be changed without notice.
  • Page 82 Band Spread ..............28MHz EXT Reference Sensitivity (10MHz, 50Ω) ......–10dBm KENWOOD follows a policy of continuous advancement in development. For this reason specifications may be changed without notice. 2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525 Japan P.O. BOX 22745, 2201 East Dominguez Street, Long Beach, Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands CA 90801-5745, U.S.A.

  • Page 83: Pc Board

    TKR-740 TKR-740 PC BOARD PC BOARD CONTROL UNIT (X53-4210-10) (A/4) CONTROL UNIT (X53-4210-10) (A/4) Component side view (J79-0034-19 A/4) Component side view (J79-0034-19 A/4) CN707 R306 IC45 R305 C303 DETO R155 C313 R304 C302 R303 C301 R302 C300 RSSI RSSI...
  • Page 84 TKR-740 TKR-740 PC BOARD PC BOARD CONTROL UNIT (X53-4210-10) (A/4) CONTROL UNIT (X53-4210-10) (A/4) Foil side view (J79-0034-19 A/4) Foil side view (J79-0034-19 A/4) R307 R125 R164 C154 C184 R165 C107 IC38 IC14 C14 + C212 C213 R166 IC22 C161...
  • Page 85 TKR-740 TKR-740 PC BOARD PC BOARD CONTROL UNIT (X53-4210-10) (B/4) CONTROL UNIT (X53-4210-10) (B/4) Component side view (J79-0034-19 B/4) Component side view (J79-0034-19 B/4) 2 SW6 MDAT CN703 CN702 C738 D710 C724 C725 IC703 D705 D704 D703 EX REF INT REF...
  • Page 86 TKR-740 TKR-740 PC BOARD PC BOARD CONTROL UNIT (X53-4210-10) (D/4) Component side view (J79-0034-19 D/4) CONTROL UNIT (X53-4210-10) (C/4) Component side view (J79-0034-19 C/4) C706 C707 J79-0034-19 C/4 14 NC GND 6 MDAT R716 VR700 C750 C714 R718 C716 +...
  • Page 87 TKR-740 TKR-740 PC BOARD PC BOARD RX UNIT (X55-308X-XX) 0-11 : K 0-12 : K3 2-71 : K2,E RX UNIT (X55-308X-XX) 0-11 : K 0-12 : K3 2-71 : K2,E Component side view (J79-0036-09) Component side view (J79-0036-09) R107 C123...

  • Page 88: Rx Unit (X55-308X-Xx)

    TKR-740 TKR-740 PC BOARD PC BOARD RX UNIT (X55-308X-XX) 0-11 : K 0-12 : K3 2-71 : K2,E RX UNIT (X55-308X-XX) 0-11 : K 0-12 : K3 2-71 : K2,E Foil side view (J79-0036-09) Foil side view (J79-0036-09) IC10 Component side...
  • Page 89 TKR-740 TKR-740 PC BOARD PC BOARD TX UNIT (X56-3140-10) (A/3) : K,K2,K3 TX UNIT (X56-3140-10) (A/3) : K,K2,K3 Component side view (J79-0169-09 A/3) Component side view (J79-0169-09 A/3) R182 R222 Q208 R149 D503 R592 R183 C594 SUB PLL R591 MAIN PLL...
  • Page 90 TKR-740 TKR-740 PC BOARD PC BOARD TX UNIT (X56-3140-10) (A/3) : K,K2,K3 TX UNIT (X56-3140-10) (A/3) : K,K2,K3 Foil side view (J79-0169-09 A/3) Foil side view (J79-0169-09 A/3) C124 C125 R251 C291 L243 R185 C254 C290 R257 R269 C287 R258...
  • Page 91 TKR-740 TKR-740 PC BOARD PC BOARD TX UNIT (X56-3140-10) (B/3) : K,K2,K3 TX UNIT (X56-3140-10) (B/3) : K,K2,K3 Component side view (J79-0169-09 B/3) Component side view (J79-0169-09 B/3) CN302 Ref. No. Address R303 R358 IC302 C323 C301 R359 C324 IC303...
  • Page 92 TKR-740 TKR-740 PC BOARD PC BOARD TX UNIT (X56-3140-10) (B/3) : K,K2,K3 TX UNIT (X56-3140-10) (B/3) : K,K2,K3 Foil side view (J79-0169-09 B/3) Foil side view (J79-0169-09 B/3) C326 C302 C305 C304 C332 C340 R330 C339 C414 C315 C316 TX UNIT (X56-3140-10) (C/3) : K,K2,K3...
  • Page 93 TKR-740 TKR-740 PC BOARD PC BOARD TX UNIT (X56-3102-70) (A/3) : E TX UNIT (X56-3102-70) (A/3) : E Component side view (J79-0037-09 A/3) Component side view (J79-0037-09 A/3) R182 R222 Q208 R149 D503 R592 R183 C594 SUB PLL R591 MAIN PLL...
  • Page 94 TKR-740 TKR-740 PC BOARD PC BOARD TX UNIT (X56-3102-70) (A/3) : E TX UNIT (X56-3102-70) (A/3) : E Foil side view (J79-0037-09 A/3) Foil side view (J79-0037-09 A/3) C124 C125 R251 C291 L243 R185 C254 C290 R257 R269 C287 R258...
  • Page 95 TKR-740 TKR-740 PC BOARD PC BOARD TX UNIT (X56-3102-70) (B/3) : E TX UNIT (X56-3102-70) (B/3) : E Component side view (J79-0037-09 B/3) Component side view (J79-0037-09 B/3) R303 R358 CN302 R359 R304 Ref. No. Address C301 C324 CN301 L308...
  • Page 96 TKR-740 TKR-740 PC BOARD PC BOARD TX UNIT (X56-3102-70) (B/3) : E TX UNIT (X56-3102-70) (B/3) : E Foil side view (J79-0037-09 B/3) Foil side view (J79-0037-09 B/3) C326 C302 C305 C304 C332 R330 C414 C315 C316 TX UNIT (X56-3102-70) (C/3) : E...

  • Page 97: Schematic Diagram

    TKR-740 SCHEMATIC DIAGRAM Note : The components marked with a dot ( ● ) are parts of layer 1. CONTROL UNIT (X53-4210-10)(A/4) CONTROL UNIT (X53-4210-10)(B/4) C181 CN702 10u10 C186 4.8V C202 470p CHECK 0.01u C229 0.01u D703 Q706-710 R706 POWER...
  • Page 98 TKR-740 SCHEMATIC DIAGRAM Note : The components marked with a dot ( ● ) are parts of layer 1. RX UNIT (X55-308X-XX) CN10 4.2V R134 0-11:146-153.995MHz 0-12:136-142.995MHz 2SC2873(Y)F 44.85MHz 1.5k 2-70:158-165.995MHz NARROW 0-11:154-162MHz IF AMP C178 R158 0-12:143-150MHz 1.5k W:0V...
  • Page 99 TKR-740 SCHEMATIC DIAGRAM Note : The components marked with a dot ( ● ) are parts of layer 1. TX UNIT (X56-3140-10)(A/3):K,K2,K3 TX UNIT (X56-3140-10)(B/3):K,K2,K3 IC601 A:136-149.995MHz A:6.7V RF AMP RF AMP 2SK2596-E R259 VCO-B 150MHz-174MHz VCO OSC RA07M1317M101 B:150-174MHz B:6.5V...
  • Page 100 TKR-740 SCHEMATIC DIAGRAM Note : The components marked with a dot ( ● ) are parts of layer 1. TX UNIT (X56-3102-70)(A/3):E TX UNIT (X56-3102-70)(B/3):E IC601 A:136-149.995MHz A:6.7V RF AMP RF AMP 2SK2596-E R259 VCO-B 150MHz-174MHz VCO OSC RA30H1317M131 B:150-174MHz B:6.5V...
  • Page 101 TKR-740 TKR-740 EXPLODED VIEW (K, K2, K3 TYPE) EXPLODED VIEW (K, K2, K3 TYPE) Cx10 EXCITER Cx11 Cx10 FINAL CONTROL Cx14 Nx10 Jx12 X56 (B/3) IC601 Nx10 X56 (A/3) X53 (A/4) X56 (C/3) IC45 Jx11 X53 (B/4) X53 (D/4) X53 (C/4) Parts with the exploded numbers larger than 700 are not supplied.
  • Page 102 TKR-740 TKR-740 EXPLODED VIEW (E TYPE) EXPLODED VIEW (E TYPE) Cx10 EXCITER Cx11 Cx10 FINAL CONTROL Cx14 Jx12 Nx10 X56 (B/3) IC601 Nx10 X56 (A/3) X53 (A/4) X56 (C/3) IC45 Jx11 X53 (B/4) X53 (D/4) X53 (C/4) Parts with the exploded numbers larger than 700 are not supplied.

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