Kenwood R-V251 Service Manual Download Page 10

Page: 10 / 25

R705

J784

J786

J785

J783

R706

R739

R735

R731

C708

R720 R719 R715

R768

R771

C723

R714

R713

R769

R711

J781

J782

R710

R708

R709

J787

J788

R751
R750

R749

R732

C713

R740

C454

R446

R447

C456

R431

C428
C427
C424

C403

R404

C406

C419 R424

R421

R417

C415

C410

R403

C420

R413

C472

C409

R411

R408

R414

R407

R428

C416

R422

R452

C461

R453

R458

R437

R465

R439

C617

R642

R648

R641

R635

R632

R631

R628

R627

R624

R623

R620

R619

R616

R615

R612

R611

R608

R607

R604

R603

C623

R636

J691

R436

C476

C453

R429

J430

C435
C434
C433
C432

R725
C715

R736

R734

C707

C704

C705

R762

R729

R727

R721

R722

R774

R772

R770

C725

C721

R746

R748

R747

R745

C701

C720

C719

R724

R723

R738

C712

R427

R445

R449

R469

R438

R470

R633

R634

C621

C620

C619

C622

R643

R644

R638

C631

R639

C635

R640

C636

C632

R637

R645

R646

R647

J426

J428

R460

R442

R430

C430

C423

C422

R402

C404

R405

R416

C418

R601

R606

R605

R602

R609

R610

R613

R614

R618

R621

R617

R622

R625

R626

R629

R630

C601

C602

C604

C605

C606

C607

C608

C610

C611

C609

C612

C613

C614

C615

C616

C603

C414

R418

R425

C457

R464

C452

R461

R451

C450

R415

C412

R409

R401

C417

R448

R454

R455

R761

R760

100

D722

D720

D721

D719

D718

D717

D713

D402

D601

D602

D401

D405

D404

Q407

Q408

Q402

Q401

Q405

Q406

D709

D710

D714

D707

D706

D703

D705

D701

D702

IC701

IC703

J737

J746

J745

J744

J743

J742

J741

J740

J739

J738

J748

J747

J732

J730

J731

J729

J727

J718
J719

J712

J713

J705

J702

J763

J762

J701

FLT701

J710

J643

J649

J653

J641

J642

J607

J622

J602

J651

J648

J711

J704

J703

J723

J724

J726

J720

J721

J722

J717

J749

J764

J709

J635

J534

J633

J625

J624

J623

J626

J644

J621

J611

J609

J610

J608

J606

J605

J604

J603

J601

J620

J619

J618

J617

J613

J615

J614

J630

J629

J628

J613

J612

J637

J638

J410

J412

J414

J404

J409

J434

J639

J408

J411

T401

J435

J407

J432

J425

J647

J708

J715

J714

J716

J707

J706

J725

J728

J734

C710

J733

J736

J735

J751

J759

J755

J758

J420

J421

VR401

J422

J423

J433

J406
J405

J419

J417

J415

J416

J431

J759

J760

J761

J752

J753

TA/NEWS/INFO

J754

SW722

C717

R765

X702

R764

R763

R712

R716

R702

R718

R717

R726

R725

R737

R730
R707

R741

J652

C618

C625

C637

C638

R649

R773

R744

R743

C703

C702

R704

R703

R701

R742

R753

R754

R759

C716

RMC701

C425

C421

C426

C431

C438

C440

C441

C460

C407 C405

C455

C360 C634

C629

C633

C624

C458

C469

C470

C471

C451

C448

C447

C449

C446

VR402

T402

T403

C709

C722

X703

C724

C706

C714

C711

X701

C439

R757

R758

R756

LED701

R755

R463

R444

C413

X401

R423

R435

R434

T406

T405

R426

R458

R419

R406

C475

C474

C402

R456

C401

R457

CF402

CF401

L401

L403

L402

L601

C718

FE401

ANT401

MODE

BAND

AUTO

A.MEMO

CONTROL

MULTI

TUNING

DISP

PTY

VOLUME

CONTROL

SET

MODE

TIMER

CLOCK

TAPE 2

INPUT

ON/STANDBY

(MONITOR)

ZD403

ZD402

ZD401

IC402

D406

IC601

JACK603

JACK601

IJACK602

CNT601

IC602

IC603

D716

D711

D712

D708

CNT702

NONE RDS : DELETE

CN702

ZD701

IC702

D704

Q409

D715

CNT701

Q706

Q704

Q705

CN703

CN704

IC401

CNT703

Q703

Q701

CNT704

Q702

SW715

VOLUME UNIT

SENSOR UNIT

TUNER UNIT

FRONT UNIT

SW714

SW721

SW716

SW713

SW728

SW717

SW712

SW719

SW718

SW711

SW701

SW704

AUX

REC

VCR

TAPE2

(MONITOR)

PLAY

REC

PLAY

TAPE/

REC

PLAY

ANTENNA

SW702

SW703

SW705

SW706

SW707

Refer to the schematic diagram for the value of resistors and capacitors.

• Power supply PCB illust, is not printed to keep the delivery( and simple

circuit) of service manual.

PC BOARD (Component side view)

Summary of Contents for R-V251

Page 1: ...TCHED TOTAL 150W MAX AC 230V 50Hz ANTENNA AM FM 75Ω GND TAPE 2 MONITOR TAPE1 MD CD AUX IN REC VCR PLAY REC PLAY REC PLAY R L L AUDIO VIDEO VCR RECOUT MONITOR OUT DVD VCR PLAYIN L R R L C 1 3 10 15 17 19 12 11 2 IN 4 9 5 7 5 7 DVD 6CH 2CH INPUT R 16 18 20 22 43 31 33 39 37 35 34 32 36 38 40 Panel dressing A21 3777 03 Window B10 2367 02 Panel A60 Knob k29 6727 04 Button R K29 Button L K29 6816 02 Ph...

Page 2: ...E PRO LOGIC 3 STEREO MULTI CONTROL TEST TONE MODE INPUT TAPE 2 MONITOR FREEZE PAL NTSC RETURN TAPE MD LO SELECT P B C REC ARM O T E LD AUTO DIGITAL CD VIDEO CD LD REPEAT FRAME TIME PTY TA NEWS INFO DISC SKIP EDIT MODE ALL TEXT SEARCH P CALL fi How to reset the microcomputer The microcomputer may malfunction impossibility of operation erroneous display etc when the power cord is unplugged and plugg...

Page 3: ...NJM2068D IC105 CDX271AQ IC110 NJM2068D IC702 2 2 NJM2068D IC603 6ab ATT IC702 1 2 LC7821 IC601 LC7821 IC106 1 2 DOLBY PROLOGIC IC108 NJM2279 SELECTOR VIDEO TUNER CD AUX MD PLAY PLAY TAPE MONITOR VIDEO PLAY TAPE MONITOR REC MD REC VIDEO REC VIDEO PLAY VIDEO REC DVD GCH INPUT MONITOR OUT L R C SL SR SW DVD GCH INPUT IC701 u COM FLT701 MUTE L R C SL SR SW C R L SW SR SL 10ab ATT B LOW TAP B HI TAP B ...

Page 4: ...DO I PLL IC IC402 DO signal 26 RCV CE I Receiver chip enable signal ENABLE 27 DSP CE O DSP IC IC105 XLAT 28 AVREF Analog power supply 5 0V 29 H P DETECT I Detection input port of headphones jack 30 SD I Detection input port of SD signal for TUNER TUNED 31 S LEVEL I A D input port of signal level 32 DSP READY O DSP IC IC105 ready 33 DSP DATA O DSP IC IC105 data 34 DSP CLK O DSP IC IC105 clock 35 OP...

Page 5: ...tput 33 XTL1 I Crystal oscillator circuit input 34 AVSX Analog GND for master clock 35 XSOUT O S ch DA converter output 36 AVS6 S ch DA converter GND 37 AVD6 S ch DA converter power supply 38 RIN I R ch AD converter analog input 39 LO2 O R ch AD converter LPF operational amplifier inverted output 40 AVS2 R ch AD converter GND R V251 5 CIRCUIT DESCRIPTION Active Pin No Pin Name I O Description H L ...

Page 6: ...interface Transfer prohibited when Low 48 T P O Unused 49 XLAT I Latch input for microcomputer interface 50 RVDT I Data input for microcomputer interface 51 XS24 I Serial data 24 32bit slot selection 24 bit slot when Low valid for slave mode 52 VDD1 Digital power supply 53 VSS4 Digital GND 54 T P O Unused 55 SI I GND 56 T P I GND 57 BCK I O Unused 58 LRCK I O Unused 59 VSS5 Digital GND 60 XMST I D...

Page 7: ... W g W g Y g g g g g g g g g g g g f W 2 6Kf O e M I Le He N 1e f e f e f e f 5e Le J He K O e V4 0Mf h h h h h g O2 6Kf MI e J YeV Le 7 H e N 1e g e g e 3 L e J e N XeW e KO e I4 0Y 5e J He W 5 e W Y e O Yf O2 0Y f 0M g O2 6Kf MI e J YeV Le 7 H e N 1e g e g e 3 L e J e N XeW e KO e I4 0Y 5e J He W 5 e W Y e O Yf O2 0Y f 0M g e e W g W g W g Y g g g g g g g g g g g g f W g W g W g Y g g g g g g g ...

Page 8: ...Le J He K O e V4 0Mf h h h h h g O2 6Kf MI e J YeV Le 7 H e N 1e g e g e 3 L e J e N XeW e KO e I4 0Y 5e J He W 5 e W Y e O Yf O2 0Y f 0M g O2 6Kf MI e J YeV Le 7 H e N 1e g e g e 3 L e J e N XeW e KO e I4 0Y 5e J He W 5 e W Y e O Yf O2 0Y f 0M g e e W g W g W g Y g g g g g g g g g g g g f W g W g W g Y g g g g g g g g g g g g f e e W g W g W g Y g g g g g g g g g g g g f W2 e 7 0Ye J h 75 h J Y h...

Page 9: ... J229 J221 J226 J225 J238 J20 J25 J57 J16 J263 J262 J261 J260 J259 J10 J263 J254 J255 J256 J257 J258 J31 J32 J22 J243 J24 J23 J55 J120 J145 J160 J161 J235 J119 J131 J121 J122 J123 J130 J56 J105 J127 J147 J124 J125 J126 C210 C216 C215 C209 C214 C26 C27 C195 C197C198 C196 C187 C176 C188 C48 C49 C47 C175 C178 C177 C179 C180 C174 C173 C172 C171 C157 C140 C127 C103 C101 C102 C118 C126 C125 C104 C43 R69...

Page 10: ...04 J603 J601 J620 J619 J618 J617 J613 J615 J614 J630 J629 J628 J613 J612 J637 J638 J410 J412 J414 J404 J409 J434 J639 J408 J411 T401 J435 J407 J432 J425 J647 J708 J715 J714 J716 J707 J706 J725 J728 J734 C710 J733 J736 J735 J751 J759 J755 J758 J420 J421 VR401 J422 J423 J433 J406 J405 J419 J417 J415 J416 J431 J759 J760 J761 J752 J753 TA NEWS INFO J754 SW722 C717 R765 X702 R764 R763 R712 R716 R702 R7...

Page 11: ...7 6 5 4 3 2 1 DET OUT S LEVEL SD STEREO R OUT GND L OUT 15V T MUTE PLL DATA PLL CLK PLL CE PLL DO R460 2 7K R405 R411 330 C461 0 01 C460 47u25 150 R444 1W 0 047 C452 3 5 4 6 3 5 4 6 1 2K 1 2K C414 2 2u50 R450 R434 R435 T METER B I F B 12V 100 R430 R431 C427 0 022 18K 22P C418 3 3u50 C425 22p C423 3 3K R407 R408 330 0 01 C410 100 R409 1 4 3 2 5 6 7 8 1 2 3 6 5 4 T405 4 3 T406 2 1 6 5 5600P C474 560...

Page 12: ...156 R158 220K 220P C153 1K R157 220K R152 R155 220P C156 R162 220K 220P C155 1K R161 220K 1K 220P C152 R154 220K 220P C151 1K R153 220K R151 C34 47P C33 47P 3 3K R59 75 R58 C36 47P 3 3K R62 75 R61 INPUT 6CH PROLOGIC 15 17 16 19 18 20 22 21 14 12 13 10 11 9 7 8 27 28 26 23 25 24 VDD VSS 4 6 5 3 2 1 14 13 12 11 1 2 3 4 10 8 9 5 7 6 10u50 C35 10u50 C38 R67 100 R66 100 11 4 75 R60 47P C37 R63 75 R64 R...

Page 13: ...u50 C102 R102 2 2K 8 220u6 3 C134 C116 1000P 3 3K R114 10K R116 10K R118 12K R124 330P C112 R126 10K C114 330P C110 10u50 100K R128 R130 39K 46 47 49 50 0 1 C133 220u6 3 C129 100K R147 C127 220u6 3 100K R148 R117 10u50 R115 1 R123 1000P C115 10K 10K 330P C111 12K 4 3 100K R127 R125 10K 2 C113 330P C109 2 2 R89 1 R90 470u6 3 C62 470u6 3 C61 3 3K R113 R91 1 220u6 3 C140 47K R293 1000P C293 0 1 C141 ...

Page 14: ...201 R249 3 9K 1W R230 3 9K 1W C203 C204 0 047 0 047 0 047 C202 3900P C30 C199 15P C200 15P 15 C217 0 047 C218 0 047 C220 0 047 C219 0 047 3 9K 1W R247 R248 3 9K 1W 3900P C58 14 4 3 2 1 4700P C237 4700P C238 0 1 C223 0 1 C225 0 1 C226 0 1 C224 R253 33K 33K R277 L101 22 R257 R251 0 1 5W 27K R255 470 R281 33K R278 22 R258 0 1 5W R252 27K R256 33K R254 R282 470 L102 1000P C221 1000P C222 4700P C239 47...

Page 15: ... 31 F1 F2 30 C702 0 022 0 022 C703 27 29 28 E VOL CE 24 26 25 16 15 12 24 22 23 MAIN MUTE H P DETECT LC7821 CE DSP READY DSP DATA DSP CE 21 23 22 GND GND 18 20 19 29 27 26 32 DSP CLK F OFF 17 16 15 5 6V VFDP 12 14 13 34 33 47 1 100 R704 1 4W 1 4W 100 R703 C701 0 01 VCR MUTE H P MUTE PWR RELAY C SW RELAY SUR RELAY TC9163 CE DSP RESET 9 10 11 FA RELAY 6 7 8 50 48 49 54 51 53 10dB ATT 3 4 5 S BUSY S ...

Page 16: ...SRS 3D MUTE 2 1 TIMER LW TUNED STEREO AUTO SLEEP PTY TA TP AM FM EX BASS S DIRECT TAPE2 3 STEREO DSP NEWS MEMO EON INFO RDS PRO LOGIC MHz kHz dB ms GND LINE SIGNAL LINE B LINE B LINE IC701 CXP82852 184Q IC702 KIA7039P IC703 TDA7330B Q701 702 2SC1740SR Q703 704 2SA933S Q705 706 DTC114ES ZD701 MTZJ6 2B D702 703 705 707 709 710 713 714 717 722 KDS160 D704 708 711 712 715 716 1SS133 FRONT UNIT R V251 ...

Page 17: ...e V L e 7 H e N 1 e g e g e 3 L e J e N X e W e K O e I 4 0 Y 5 e J H e W 5 e W Y e O Y f O 2 0 Y f 0 M g O 2 6 K f M I e J Y e V L e 7 H e N 1 e g e g e 3 L e J e N X e W e K O e I 4 0 Y 5 e J H e W 5 e W Y e O Y f O 2 0 Y f 0 M g e e W g W g W g Y g g g g g g g g g g g g f W g W g W g Y g g g g g g g g g g g g f e e W g W g W g Y g g g g g g g g g g g g f W 2 e 7 0 Y e J h 7 5 h J Y h 6 K f I 4 ...

Page 18: ... 05 CORD ASSY L068040011010 X 616 1C E30 2788 05 CORD ASSY L068040011010 E 616 1C E30 2791 05 CORD ASSY L068040011010 T 620 2A E35 2536 08 CABLE FLAT L301291310010 636 2B 2C G13 2504 08 CUSHION FOOT 4050020365010 H10 7646 08 CUSHION SNOW 6230210084000 H25 1665 08 POLY BAG UNIT 6337000409030 H50 3499 08 BOX GIFT 6007210040010 635 2B 2C J02 1472 08 FOOT 4000020121010 637 2B J19 3031 08 SUPPORTER 407...

Page 19: ...175 180 CE04KW1H4R7M ELECTRO 4 7UF 50WV C181 185 CK73FB1H102K CHIP C 1000PF J C186 CC73FCH1H471J CHIP C 470PF J C187 191 CE04CW1H010M ELECTRO 1 0UF 50WV C193 194 CC73FCH1H101J CHIP C 100PF J C195 196 CE04CW1H100M ELECTRO 10UF 50WV C197 198 CE04KW1A101M ELECTRO 100UF 10WV C199 200 CC45FSL1H150J CERAMIC 15PF J C201 204 CK45FB1H473Z CERAMIC 0 047UF Z C205 207 CC73FCH1H101J CHIP C 100PF J C208 210 CE0...

Page 20: ...o Description Desti nation Re marks C702 703 CQ93FMG1H223J MYLAR 0 022UF J C704 705 CC73FCH1H270J CHIP C 27PF J C706 CE04CW1A101M ELECTRO 100UF 10WV C707 708 CK73FB1H103K CHIP C 0 010UF K C709 CE04CW1H010M ELECTRO 1 0UF 50WV C710 C90 3894 08 ELECTRO 0 047F 5 5WV C711 CE04CW1H010M ELECTRO 1 0UF 50WV C712 713 CK73FB1H103K CHIP C 0 010UF K C714 CE04KW1H101M ELECTRO 100UF 50WV C715 CK73FB1H103K CHIP C...

Page 21: ...ussia H Korea M Other Areas indicates safety critical components Ref No Add ress New Parts Parts No Description Desti nation Re marks R63 RN14BK2H75R0F RN 75 0 F 1 2W R64 65 RS14AB3A391J FL PROOF RS 390 J 1W R69 RS14AB3D330J FL PROOF RS 33 J 2W R74 75 RS14AB3A221J FL PROOF RS 220 J 1W R76 RK73FB2A751J CHIP R 750 J 1 10W R77 RK73FB2A272J CHIP R 2 7K J 1 10W R78 79 RK73FB2A102J CHIP R 1 0K J 1 10W R...

Page 22: ... Other Areas indicates safety critical components Ref No Add ress New Parts Parts No Description Desti nation Re marks R461 RK73FB2A333J CHIP R 33K J 1 10W R464 RK73FB2A181J CHIP R 180 J 1 10W R465 RK73FB2A103J CHIP R 10K J 1 10W R469 470 RK73FB2A152J CHIP R 1 5K J 1 10W R601 602 RK73FB2A102J CHIP R 1 0K J 1 10W R603 604 RK73FB2A224J CHIP R 220K J 1 10W R605 606 RK73FB2A102J CHIP R 1 0K J 1 10W R6...

Page 23: ... 704 2SA933S SEMI TR GE PNP Q705 706 DTC114ES SEMI BRT NPN RC ZD10 12 MTZJ5 1B D ZENER ZD19 20 MTZJ6 8B D ZENER ZD21 MTZJ3 3B D ZENER ZD22 MTZJ2 7B D ZENER ZD23 MTZJ6 2B D ZENER ZD101 102 MTZJ16B D ZENER ZD201 204 MTZJ8 2B D ZENER ZD401 MTZJ5 1B D ZENER ZD402 MTZJ2 7B D ZENER ZD403 MTZJ8 2B D ZENER ZD701 MTZJ6 2B D ZENER FE401 W02 2729 08 TUNER FM E900401010010 RMC701 W02 2730 08 MODULE REMOCON E9...

Page 24: ...inputs outputs composite 1 Vp p 75 Ω DVD inputs outputs composite 1 Vp p 75 Ω FM Tuner section Tuning frequency range 87 5 MHz 108 MHz Usable sensitivity DIN MONO 1 2 µV at 75 Ω 13 2 dBf 40 kHz dev S N 26 dB STEREO 35 µV at 75 Ω 42 dBf 46 kHz dev S N 46 dB Signal to noise ratio DIN weighted at 1 kHz 40 kHz dev MONO 65 dB 65 2 dBf input STEREO 60 dB 65 2 dBf input Selectivity DIN 300 kHz 63 dB Ster...

Page 25: ...tions This manual is based on Europe E standard and provides information on regional circuit modification through use of alternate schematic diagrams and information on regional component variations through use of parts list Audio section Rated output power during STEREO operation 1 kHz 10 at 6 Ω 70 W 70 W Effective output power during SURROUND operation FRONT 1kHz 10 T H D at 6 Ω 70 W 70 W CENTER...

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