Kenwood LDK-300-V Service manual

VIDEO-CD LD PLAYER

0

AUTO

PAUSE

OPEN

DIGITAL

MONITOR

6

7

4



¢

ECHO LEVEL

KARAOKEKEY CONTROL

IiÈ

POWER

-ON–OFF

MIC2MIC1

MIC LEVEL

2

1

MIC

MIC CONTROL

ON/STANDBY

VIDEO CD LD PLAYER LD-K300V

AUTO AUDIO

PREVIOUS NEXT

°

AC -

3 OUT

RF

DIGITAL VIDEODIGITAL VIDEO

COMPACTCOMPACT

VIDEO CD

VIDEO
OUTPUT

AUDIO
OUTPUT

Dolby AC - 3
RF OUT

SYSTEM
CONTROL

2/R

1/L

LD-K300V

SERVICE MANUAL

Miniature phone jack

Indicator
(B12-0316-04)

(E11-0200-05)

Escutcheon
(B07-2359-12)

Panel
(A19-0865-01)

Dressing panel
(A21-1966-03)

© 1997-8/B51-5333-00 (K) 2337

Knob
(K29-6689-02)

Panel
(A60-1155-11)

Phono jack
(E11-0366-05)

Knob
(K29-6688-02)

Foot
(J02-1188-03)

Phono jack
(E63-0130-05)

Phono jack
(E63- 0116-05)

Refer to LVD-290 service manual (B51-5233-00), if you
require the semiconductor description (X32, IC9 9 MPEG
u-COM) and disassembly for repair in detail.

Miniature phone jack
(E11-0188-05)

Phono jack
(E63-0122-05)

Power cord busing
(J42-0083-05)

AC power cord
(E30-2717-05)

Front glass
(B10-2361-13)

Attention !

To avoid firing or other accident, the repair (in clouding
replacement of fuse) of the switching power supply
P.C.B. (W02-2568-35) is prohibited.
In case of the repair (defective P.C.B.), please replace
the complete P.C.B. with new one.

Knob
(K29-6687-03)

Knob
(K27-2233-04)

Foot
(J02-1188-03)

Metallic cabinet
(A01-3440-01)

LD-K300V

NO DISC

CONTENTS / ACCESSORIES / CAUTIONS

Contents

CONTENTS / ACCESSORIES / CAUTIONS..............2

ADJUSTMENT............................................................3

PC BOARD .................................................................5

SCHEMATIC DIAGRAM.............................................9

Accessories

EXPLODED VIEW ....................................................26

PARTS LIST..............................................................28

PARTS DESCRIPTIONS..........................................37

SPECIFICATIONS ......................................Back cover

Audio cord (2)
(E30-0505-05)

Video cord (1)
(E30-1427-05)

Cautions

Beware of condensation

When water vapor comes into contact with the surface of cold
material, water drops are produced. If condensation occurs, correct
operation may not be possible, or the unit may not function correct­ly. This is not a malfunction, however, and the unit should be dried.
(To do this, turn the POWER switch ON and leave the unit for sev­eral hours.)

System control cord (1)
(E30-2733-05)

AC plug adaptor (1)
(E03-0115-05)

Use to adapt the power cord to
the shape of the wall outlet.
(Accessory only for regions
where use is necessary.)

Be especially careful in the following conditions:

● When the unit is brought from a cold place to a warm place,

and there is a large temperature difference.

● When a heater starts operating.

● When the unit is brought from an air-conditioned place to a

place of high temperature with high humidity.

● When there is a large difference between the internal tempera-

ture of the unit and the ambient temperature, or in conditions
where condensation occurs easily.

Note related to transportation and movement

Before transporting or moving this unit, carry out the following
operations.

1. Turn the power ON but do not load a disc.

2. Verify that the display shown appears.

3. Wait a few seconds and turn the power OFF.

2

ADJUSTMENT

MAIN UNIT(X34-1033)

No. ITEM

1

2

3

4

5

6

TILT

BALANCE

FOCUS

BALANCE

Setting the TEST MODE (Short-circuiting the CN7 pin 1 and 2 in AC IN mode : TE OFF)

TRACKING

BALANCE

FOCUS

GAIN

TRACKING

GAIN

VIDEO
LEVEL

INPUT

SETTING

LD TEST DISC

TEST DISC

TEST DISC

TEST DISC

Apply a signal

(1.0kHz/0.2Vp-p) to

CN3 pins 4 and 5 .

TEST DISC

Apply a signal

(1.3kHz/0.2Vp-p) to

CN3 pins 1 and 2.

LD TEST DISC

OUTPUT

SETTING

Connect the

TV monitor to the

video output.

Connect an

oscilloscope to RF :

CN3 pin 6 (EFM).

Connect an

oscilloscope to RF :

CN3 pin 6 (EFM).

Connect an

oscilloscope to

TE : CN3 pin 1.

Connect an L.P.F.to

CN3 pins 4 and 5, to

which connect an

oscilloscope or two

AC voltmeters.

Connect an L.P.F.to

CN3 pins 1 and 2, to

which connect an

oscilloscope or two

AC voltmeters.

Terminate the video

output with a 75Ω

resistor and connect

an oscilloscope to

both ends.

PLAYER

SETTING

Frame No.19,001

STILL (Still image)
*Frame No.23,402

STILL (still image)

Frame No.20,000

STILL (still image)

PLAY VR2

TE OFF VR1

PLAY VR4

PLAY VR5

Frame No.100

STILL(still image)

*Frame No.13,000

STILL(still image)

ALIGNMENT

LD-K300V

POINT

VR3

VR7

ALIGN

FOR

Minimize the

crosstalk on the

screen.

Eye-pattern is

maximum and clear.

Maximize the RF

signal (eye pattern)

amplitude.

Symmetry between

upper and lower.

Two VTVMs should

read the same level.

Two VTVMs should

read the same level.

Video signal

amplitude to 1.0Vp-p

FIG.

(a)

(a)

(b)

Connect a

7 4Fsc POWER ON

VIDEO CD UNIT (X35-2170-20) Setting the power on

VIDEO CD

8

CLOCK

Note : L.P.F. : 33kΩ+1000pF or so, CD disc : CD test disc (SONY YEDS-18 or equivalent), LD disc : CAV30cm

(with digital sound), STILL : Remote controller's key.

fig. : Waveform (P.12)

POWER ON

frequency counter to

check land (14M) of

IC3 pin 7.

Connect a

frequency counter to

check land

(13.5MHz) of

IC2 pin 99(R16).

STOP TC1 14.31818MHz±50Hz

STOP TC1 13.5MHz±50Hz

3

LD-K300V

➀

➅

GND

Main unit (X34)Oscillocope

(a) TILT BALANCE / FOCUS BALANCE / TANGENT

GND

Main unit (X34)Oscillocope

(b) TRACKING BALANCE

CN3

CN3

CN7

CN7

E = F

ADJUSTMENT

MECHANISM ADJUSTMENT PROCEDURE

No. ITEM

<1> TANGENTIAL CD TEST DISC

<2>

Note : CD disc : CD test disc (SONY) YEDS-18 or equivalent), LD disc : CAV 30cm (with digital sound)

Radial-Dependence
adjust (slide the pickup to
meet with the center of
the pickup and that of the
turntable.)

R-

DEPENDENCE

INPUT

SETTING

CD TEST DISC

OUTPUT

SETTING

Connect an

oscilloscope to CN3

pin 6 (EFM). (MAIN

UNIT)

Connect an L.P.F. to
CN3 pins 7 and 8, to

connect an

oscilloscope and

select X-Y mode.

(MAIN UNIT)

PLAYER

SETTING

PLAY

PLAY

ALIGNMENT

POINT

Tangential nut
(Turn within ±4

clicks)

R-dep. nut (Less

than ±10°)

Maximize the RF

signal (eye pattern)

Adjust so that the

Lissajous waveform

becomes -45°

ALIGN

FOR

amplitude.

FIG.

(a)

Tangential adjust
(Keep the disc
horizontally for the
pickup)

4

A BDFHJCEGI

PC BOARD(Component side view)

1

2

3

LD player unit (X34-1033-00)

4

5

6

7

5 6

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

K M O Q SL N P R T

PC BOARD(Component side view)

1

Display unit (X25-5983-00)

2

3

Sub-circuit unit (X13-7400-20) Video unit (X35-2170-20)

4

5

6

7

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

7 8

A BDFHJCEGI

(

)()

()(

)

)

(

(

)

(

)

)

(

(

)
)

(

(

)
)

(

(

)

L2
H1

15

10

(

)

(

)

(

)

(

)

)

(

)()

(

)

(

(

)

(

)

)

(

FE BAL

(

)

(

)

)

(

)

(

)

(

TILT BAL

)

(

1u H

E

AD

BC

F

PD VCC

PD VEE

RF

(PD)

OPIC

LD

OBJECTIVE

LENS

-+

-

+

TRACKING

COIL

FOCUS

COIL

TGKG RTN

TGKG RTN

TGKG RTN

TGKG RTN

9
10
11
12

14
15
16

17
18

20
21

24

23

22

1 H

É˚

8

7

6

1K(B)

5

3

2

1

4

TILT LED

TILT PD IN

TILT PD OUT

TILT SENSOR

T RTN

F RTN

F MO

T MO

VEE

VCC

RF

RF GND

E

F

19 NC

13 NC

B

C

D

A

RF GND

VR
D

LD

PD OUT
RF GND

PD IN

LED

TILTAPCPD

1
2
3

FG BI

GND

FG OUT

WH1 WH1

FG SENSOR

PH1

3

2

1

S2
SLT

(LD) (CD)

SLT

S1

6

5

4

3

2

1

WH2

GND

LD SW
CD SW

FG BI

FG OUT
GND

MOTOR

SLIDER

PH1: T95-0048-05

SPINDLE

MOTOR

SLDMO

SLDRTN

A

B

MOTOR

LOADING

C

­+

+

-

+

-

+

-

VEE

VEE

+

-

+

-

+

-

+

-

CD LD

LD/CD

+

-

AGC

-

+

-

+

VCC

RF-AMP

24
23

22

21

20

19
18

GND

1

2

3

4
5

6
7

17

16
15

14
13

8
9

10

11

12

0.1

C232

C234 0.033

C236 0.47u50

R356 10K

C238

47K

R368

330P

C241

0.068

47K

R362

D15

100u10

C207

68P

C216

10K

R228

C220 47P

R226 15K

0.47u50

C208

+

15K

R255

1M

R250

100u10

C211

+

82K

R229

1
2
3

4
5
6

78EF

RF(EFM)

FE1

FE2

GND

TE2

TE1

A
D10

9

VR 5
PD

GND

LD 8

7

6

PD IN

PD OUT

GND 4

3

2

LED 1

13NC

F14

BC12

11

15E

VEE

GND2019

RF

VCC

GND

17
18

16

23FRTN

TMO 24

FMO

TRTN2221

u-COM G 4

FG OUT 5

CD SW
LD SW

FG BI 3

2

1

CN3

CN1

24

100u10

C205

+

100

R221 82K

R222 33K
R223 68K

R225 68K

R224 33K

C212 68P

23

21
22

R202

+

100

R213

100K

R212

22

R218

100u10

C201

+

L15

10u H

Q29

DIODE
DRIVE

LASER

VR1 22K

TE BAL

R357 100

1
2

6

0.022

C500

680

R507

2.2K

R502

180

R519

220P

C511

220

R501

Q51

LD FEM
RF AMP

APCPD

CN2

C206

100u10

+

2.2K

R203

220

R204

Q28

BUFFER

RF SIGNAL

VR2
47K

7-

4

(2/2)

+

IC10

86

4.7K

R243

1u50

C202

+

100K

R242

470

R238

1K

R239

0.01

C287

R241 1K

0.01

C286

10K

R240

R209

4.7K

18K

R210

5.6K

R237

5

AMP

(FG SIGNAL)

0.1

C213

22

R28422R283

10K

R325

15K

R264

22u50

C210

+

C237 0.01

C209 0.1

R263 100K

10K

R269

100K

R274

2.2

R282

220K

R280

2.2

R281

5

6

IC13

+
4

-7

6

IC12

-

+857

3

IC13

+

28

-1

(1/2)

AMP

(1/2)

(2/2)

D13

COMPARATOR

+
10

IC14

-

4

3

2

10K

R279

(1/2)

1

SWITCH
(LOADING
MOTOR CONTROL)

68K

R278 56K

R272

120K

R277

90

20

Q65

Q66

Q64

SWITCH
(LOADING)

17

18

+

3

(1/2)

IC10

-21

2.2K

R258

1K

R271

100K

R256

1u50

C244

0.01

C250

0.1

C248

0.01

C233

1K

R259

VR4

1K

716

68

AMP
4D(FSUM)
SIGNAL

Q74

100P

10K

VR5 10K

R361

C235

R359

100

C249

6800P 10K

R363

6

1

2

5

+

6

(2/2)

IC15

-

7

9

8

1.2

R299

1.2

R298

FIL,SEL

(VIA EQ SEL)

Q42

24

R302 4.7

4.7

R296

0.1

C222

R303 4.7

R382 150K

C223 100P

10K

R300

C218 0.01

C282 22u50

+

R301 22K

4.7

R297

21

R372 470KR371 220K

Q27

+

10

1

-

2

3
4

IC15

(1/2)

4.7

R305

4.7

R306

4.7

R304

R307 1.2

R308 1.2

4.7

R309

C224 0.1

R310 22K

22u50

C283

+

R311 22K

C225 560P

22

23

Q62

FOCUS
DRIVE
MUTE

Q67

470K

R314

10K

R315

Q20

560P

C251

(5/7) (1/7)

IC9(6/7)

IC9IC9

INVERTER

IC9(1/7~3/7)

TRADKING MOTOR DRIVE

2

1

1011

12

13

FOCUS MOTOR
DRIVE

SLIDER
MOTOR
DRIVER

FE GAIN

R205

330

GAIN

TRK

WH5

PHOTO
INTERRUPTOR

3

E5

1

2

PH1

C17

0.1

0.056

C16

CN2

LDMO

1

LDRTN

2

7

6

5

CLOSE

GND

TILTOUT

3

S32

OPEN

TILTB

1

2

E4

10K

R25

10K

R23

4

3

180

R24

5.6K

R22

2

1

WH4

LDMO

LDRTN

GND

CLOSESW

OPENSW

TILTOUT

+5V

PH1 :T95-0108-15

2.0V

3.1V

3.8V

0V

0V

0V

-5.0V

3.2V

-5.2V

-0.1V

-0.1V

0V

0V

0V

-2.0V

0V

0V

5.0V

0V

-2.0V

0.7V

0V

0V

-0.5V

5.0V

5.0V

-5.2V

1.3V

4.7V

-2.6V

-1.3V

-0.5V

-0.5V

-0.5V

0V

-5.2V

0V

0V

0V

0.7V

0.7V

14.2V
0V

0V

0V

2.5V

2.5V

2.5V

-5.2V

-14.1V

0V

0.6V

Q64-66

0V

C285

0.01

14.2V

R275

47K

R276

47K

R273

47K

Q60

Q55

R379

4.7K

R380
680K

R377

10K

22K

R378

Q54

Q52

D37

R385

4.7K

C256 0.01

SWITCH

10u16

C573

+

1K

R523

47P

C515

2.2K

R522

470

R524

10K

R521

R591 10

1/4W

25

12K

R312

2

3

1

Q60

Q55

1

37

-4.6V

0V

0V

-4.5V

0V

0V

0V

5.0V

2.4V

-4.0V

-3.4V

0.3V

3.8V

-0.4V

5.0V

0.3V

0.9V

0V

-0.4V

5.0V

5.0V 0V

-5.2V

0V

0V

4.9V

0V

-5.2V

5.0V

5.0V

0V

-5.2V

4.4V

5.0V

-5.2V

VR3

100K

R289 22K

390K

R286

R287 22K

390

R285

220K

R288
R290
220K

0.01

C203

1M

R291

R293

1K

3.3K

R233

1M

R292

C204

0.01

16

19

R257

10K

Q23

Q22

R322

22K

22K

R316

Q21

-5.2V

R320

10K

R319

4.7K

100

R294

D11

3

Q21,52

D36

R313

220K

10K

R326

Q30

4.7V

33K

R358

0.068

C247

Q31

HFI INPUT

+5V

-5V

-5V

+5V

-5V

+5V

+5V +5V

+5V

+5V

+5V

-5V

-5V

-5V

+5V

-5V

+5V

-5V

+5V

-5V

+5V +5V

-5V -5V

-5V

+5V

-5V
+5V

+5V

+5V

+5V

-5V

+14V

+5V

+5V

+5V+5V

+5V

-14V

-14V

+5V

+5V

+14V

+14V

+5V

+5V

-5V

-5V

+14V

+14V

+14V

+14V

-5V

+14V

GND LINE

SIGNAL LINE

+B

-B

0V

4.9V

0V

0V

0V

0V

+B LINE

-B LINE

PICKUP(V-SF1B)
(X93-1000-03)

(X25- )(A/2) (X25-5020-01) (B/2)

MM

MECHA ASS'Y (BLACK:X92-1680-91) (GOLD:X92-1681-01)

M

MECHA ASS'Y (X92-1621-01)

IC11

IC35

(3/4)

IC35

(4/4)

(X34-1033-00) (1/2)

(X25- ) (F/6)

(X25- ) (E/6)

TEST

INVERTER

CONTROL

ON/OFF

ANALOG RF
SIGNAL AMP

Q50

TRK
DRIVE
MUTE

IC9 : TC74HCU04AF
IC10,12,13,22 : NJM4565M
IC11 : LA9425
IC14,15 : TA8410AK
IC16 : NJM2903
IC19 : TC74HC74AF
IC23 : LA9420MKMT or LA9420M
IC24 : LC7830E
IC26 : CA0002AM
IC30 : NJM2058M
IC35 : TC4053BF

Q20-22,26,42,43,46,52,53,55,56,60,62,63,66,70,71,74,76

: UN5212 or DTC124EUA

Q27,67 : 2SK163(L,M):
Q28 : 2SC3311A(Q,R) or 2SC2458(Y,GR)

Q23,40,41,48,50,51,54,58,59

: 2SC4081(R,S)

Q47,57,69 : 2SA1576(R,S)

D13,19 : DA204U

D11,14,15,20,26 : 1SS33 or HSS104

D21~23,37 : DAN202U

D29,30,36

D24,25,2738,39,607

D31~34

: DAP202U

: MA110

: S5688B or 1SRB9-400

INVERTER

SWITCH
DEEMPH

D33

D32

D31

D34

D35 : 1SV101

INVERTER

INVERTER
(LD SW
SIGNAL)

MUTE FET

SWITCH
(VIA TRK GAIN SEL)

Q31 : UN5112 or DTC124EUA

Q30,61,68 : UN5112 or DTA124EUA

1

2

3

4

5

6

7

K M O Q SL N P R T

()()()()(

)

(

(

)

)

(

)

)

(

)

(

)

(

)

(

)

(

)

(
(

)

)

(

(

)

(

)

)

(

(

)()()

11

12

9

4

3L

13

14

L

H

(

)

)

(

(

)

)

(

)

(

(

)

)

(

)

(

(

)

)()

(

)()

(

)

(

)

(

H5

(

)

(

)

)

(

)

(

)

(

TO LF

16 33

THLD

FLD

17

64

15

THD

34

CLK

14

TAO

35

V/A

13

TAS

36

SGND

12

TAN

37

F/R

11

THI

38

PWM

10

TLD

39

PAC

9

TCD

40

PAO

8

TEL

41

PA-

7

TEI

42

SPO

6

TE

43

SPLD

5

DFI

44

SPCD

4

TESI

45

LVO

3

HFI

46

LVG

2

FEI

47

LVE

1

FCD

48

CLVO

TGL

FHI

18

63

TOFF

FAN

19

62

TES

FAS

20

61

HFL

FAO

21

60

FZD

VEE

22

59

FOCS EMLI

23 58

CLV- EMCI

24 57

CLV+ RFG

25 56

SLCO AFMI

26 55

SLC- PAS

27 54

SLC+ AFMO

28 53

PDI EFMO

29 52

PD- VCC

30 51

VCOC CXO

31 50

VCOO CX

32 49

C510 0.047

C518 0.01

C513 0.047

470K

C231 1200P

R386 68K

R390

18K10K

R391

C263

100P

6.8K

R387

0.47u50

C260

C261

4.7u25

R364 47K

47K

R355

R354

4.7K

R352

R351
470K

100u10

C509+

100u10

C508

+

R365 68K

C239 4700P

R367 27K

C240

C242 0.1

R369 10K

330P

47P

C245

68K

R366

10K

R353

22K

R515

1000P

C517

47K

R512

0.033

C516

R514 22K

252423

20

19

13

14

5600P

C246

HIL SIGNAL

MUTE

Q43

D14

SERVO/AUDIO

RF AMP

0.056

C269

68K

R429

47K

R421

220P

C298

220K

R434

82P

C299

2200P

C295

470K

R427

100P

C294

R424 220K

68K

R426

1.2

R422

330K

R418

56K

R415

4.7K

R420

3300P

C265

10u25

C293

100K

R430

0.01

C292

22K

R419

47K

R394

R395 220K

0.033

C264

220K

R402

10K

R403

18K

R401

100K

R398

55

100K

R404

4.7K

R399

47u10

C266

+
100K

R397

22K

R400

54

56

1000P

C297

1M

R428

10u16

C296
+

R433

47K

53

R383

1K

0.01

C262

58

57

100K

R435

R511 22K

R513 33K

SWITCH LD

(SPINDLE)

(SPINDLE GAIN)

SWITCH

Q40

Q41

TGL

24

VCOC

THLD

25

80

TOFF

23

FSEQ

22

PCK

21

TES

20

HFL

19

18

TEST3

17

TEST2

16

V/P

15

CLV-

14

CLV+

13

TEST1

12

EFMI

11

VSS

10

EFMO

9

TAI

8

ISET

7

AVDD

6

FR

5

AVSS

4

PDO1

3

PDO2

2

VPDO

1

26

TEST4

79

DEFI

27

VDD

78

CS

28

JP+

77

TEST5

29

JP-

76

4.2M

30

SLD+

75

16M

31

SLD-

74

CONT2

32

EMPHO

73

TESTF

33

P5

72

RES

34

LRCKO

71

CQCK

35

DFLRO

70

COIN

69

SQOUT

68

RWC

680

R516

0.1

C519

C521 0.01

13

C520 0.1

R517 1.2K

R518 56K

14

20

19

24

23

872486

10K

R525

0.01

C524

120P

C506

220P

C404

10P

C505

5P

C512

1K

R509

L16

120uH

C503 150P

0.047

C514L17

120uH

0.1

C501

47

R504

27P

C502

R506

1K

R505 15K R503

15K

R360 82K

4

+

3

(2/2)

AMP

-

2

1

+

-

5

6

IC16

(2/2)

7

IC16

(1/2)

3

-+1

2

10u25

C243

C226 1u50

R324 220K

33K

R321

0.01

C215

22K

R323

0.01

0.01

C217

IC12

COMPARATOR

4

8

27K

R376

22P

C254

470P

C252

100K

R318

R317 100K

C257 10P

Q71

IC22

(2/2)

6
5

+

-

7

IC9

R370

100K

D19

D23

INVERTER

GND2Q

87

1Q

9

2Q

6

1Q

10

2PR

5

1PR

11

2CK

4

1CK

12

2D

3

1D

13

2CLR

2

1CLR

14

VCC

1

1K

R375

IC9

100K

C281 0.01

R520 39K

Q63

43

56

D20

INVERTER

21

IC9

D-FLIP
FLOP

14

7

R374

OSC

IC9(4/7~6/7)

7

6

+8

IC14

-

5

33K

R340

0.1

C229

C227 100P

100K

R331

R330 10K R329 10K

100K

R334

R332 82K

R333 100K

R335 82K

4.7

R328

4.7

R338

5.6

R337

5.6

R336

C228 100P

D21

D22

9

D26

SWITCH

(SULDFD

ERROR

2.2K

R345

180K

R344

22u50

C230

+

82K

R346

100K

R575

100K

R574

Q53

Q57

21

25

52

­+

2
3

IC22

1

2.7K
10K

R348

R349

R350

2.7K

10K

(1/2)

AMP

D.S.P

97

95

680K

R343

AMP GAIN)

(7/7)

(2/7)

(3/7)

MODE CHANGE AMP

OR

1u50

R541

150K

C549

10u25

C548

R540
220K

C569

0.1

0.1

C552

4700P

R539

47K

C551 220u10

R537

+

8.2K

C535

4700P

R543
220K

14

13

15

COMP

VCA

STC

VCC

R542
150K

16

18

17

C539

19

0.039

C537
21

20

FTC

OR

STRETCH

DOS2

CORR.

ERROR

TBC

C533

4700P

R533

10K

DEMODULATION

FM AUDIO

C547 100u10

R535

15K

22

24

23

+

DELAY

DOS1

LIMITTER

X

ALC

L28

R IN

L IN

GND

L OUT

R531 1K

R532 1K

OR

0.47u50

VCA

11

12

10

C550

+

DOS2

STRETCH

GND

C542 220u10

9

7

8

+

C540

0.039

C538

1u50

645

R538

8.2K

C536

4700P

R534

10K

DELAY

X

LIMITTER

DOS1

R OUT

GND

312

+

R536

15K

C534

4700P

8

9

10

35

1

5

1K

R455

1K

R454

0.9V

4.9V

0.2V

0V

-5.1V

1.1V
0V

0V

2.5V

-1.3V

0V

0V

0V

5.0V

0V

-5.2V

0V

-5.2V

0V

-1.3V

0V

0V

0V

0V

5.0V

-5.1V

1.3V

0V

0V

0V

0V

0V

0V

-0.5V

0V

0V

5.0V

0.4V

1.6V

2.6V

2.5V

0V

1.2V

0.2V

2.5V

1.7V

5.0V

0V

5.0V
0V

0V

-5.1V

D38

D39

C522 27P

27P

C507

L18

150uH

22K

R381

98

IC9

(4/7)

0.01

C253

47K

R392

89

88

R373

100K

C214

-14.1V

R347

4

8

8

7

(2/2)

3

2
1

1

2

3

14

1
2
3
4
5
6

1
2

3

1
2

3

0V

C259

0.01

10K

R610

47u10

C605

+

220

R606

Q69

2

13 13

12

-14.2V

0V

-1.9V

0V

0V

0V

-2.6V

-2.8V

-2.6V

0V

-1.9V

0V

-5.2V

5.0V

0V0V

2.9V
0V

2.9V

2.7V

0.5V

4.9V

4.9V

5.0V

0V

0V

4.2V

5.0V

3.5V

0V

1.3V

0V

5.0V

4.3V

2.5V

4.9V

4.8V

4.9V 0V

C258

0.01

100K

R339

5.0V

Q70

-14V

-5V

+14V

+5V

-5V

-5V

+5V +5V

+5V

+5V

+5V

+5V

-14V
+5V

-14V

+5V

-5V

-5V

+5V

-5V

-5V

-5V

+5V

+5V

-5V

+5V +5V

-5V

+5V+5V

+5V

-14V

-14V

-14V

+14V

+5V

-5V

-14V

+5V

+5V

+5V

-14V

+14V

-14V

+14V

-14V
+5V

+14V

-5V

+5V

+14V

+5V

-5V

+5V

-5V

+5V

+5V

-5V

+14V

-5V

+14V

-5V

+5V

+5V

0V

2.1V

L29

10uH

10uH

L30

9P

C149PC24

4.6V

2.2V

2.9V

2.8V

2.5V

2.4V

2.5V

2.4V

2.9V

2.5V

0V
0V

0V

0V

0V

0V

1.1V

0V

0V

2.6V

4.7V

1.0V

0V

1.5V

2.6V

2.5V

2.5V

0V

-1.9V

2.9V 2.5V

0.1

C270

4.7K

R423

4.7K

R405

5.0V

0V

0V

5.0V

5.0V

0V

5.0V

0V

IC23

IC35(2/4)

IC19

IC35(1/4)

IC24

IC26

INVETER

SWITCH
MUTE

A MUTE
DRIVE

SERVO ERROR
COMPARATOR

B.P.F

SLIDER/SERVO
GAIN SEL

TITL/LOADING
MOTOR DRIVER

U V X Z AB ADW Y AA AC

(

)

)

(

)

(

)

(

(

)

)

(

)
)

(
(

)

(

(

)

)
()(

)

(

(

)

(

)

)

(
(

)

)

(

)

(

(

)

)

(

)

(

)
(

(

)

(

)

(

)

)
(

(

)

(

)

)

(

)

(

)

(

)

(

)

(

)

(

)

(

DFLR

41

42

LRSY

43

CK2

44

45

C2F

46

MUTEL

47

LVDD

48

LCHP

49

LCHN

50

LVSS

51

XVSS

52

XOUT

53

XIN

54

XVDD

55

RVSS

56

RCHN

57

RCHP

58

RVDD

59

60

SBSY

61

EFLG

62

PW

63

SFSY

64

SBCK

36

DACKO

37

CONT1

38

DFCK

67

WRQ

39

DFIN

66

FSX

40

EMPH1

65

DOUT

41

42

43

45

R526 1K

17

16

18
15

31

23

150

R528

220u10

C575
+

R527 150

220u10

C576
+

150

R529

1K

R566

1.2K

R560

1K

R568

C566 4700P

330P

+

0.01

C580

27K

R586

27K

R588

C564

470P

C560

0.33u50

C546

+

16K

R562

1.2K

R556

R572 R564

22K1M

R582

R558

12K

12K

R554

C562 4700P

654

7+-

L.P.F.

AMP

+-8

10

9

+

330P

C565 4700P

C561 4700P

16K

R561

R567

1K

R555

1.2K

R553

12K

R565

1K

R559

1.2K

R557

12K

22K

R571

R563

470P

C559

C563

R585

27K

R587

27K

C545

0.33u50

+

C578

220u10

+

L19

1.5uH

2200P

C553

2.2K

R544

R552 1M

15P

C554

10K

R579

10K

R580

R570 1K

2200P

C555

R384

R573

X2

16.9344MHz

22K

R597

D29

D30

39

38

Q56

Q59

Q58

R595

D35

1K

R569

E4

E1
E2

uGND

-5V

N

F
B

+5V
GND

RF GND

G

-CN4

X34-2/2

2/4

11

1M

R581

AMP

L.P.F.

Lch

2/4

X32-2/2

W02

4/4

-CN201

2/4

X34-2/2

-CN5

44

47

2
3

+

- 1

­+

13

12

14

C582

100u16220u16

C581

22K

R584

R583

22K

150P

C572

150P

C571

16K

330P

C568C567

330P

16K

R663 100
R664 100
R665 100

0V

2.5V

0V

4.9V

2.1V

4.7V

2.0V

2.4V

2.4V

2.4V

4.9V

2.4V

0V

2.5V

0V

1.7V

2.5V

2.5V

0.01

C531

220

R450

10K

R451

100

R448

4.7K

R447

10K

R446 1K

R445

15P

C541

Q47

Q48

Q46

1
2

3

5
6
7
8

4.7K

R611

D607

9

47K

100K

22K

100K

R500

27

IC30

Q47,48

AC3
MUTE

S BUSY

VOUT
Rch
GND
Lch

8

7

+14V

-14V

14V GND

RF

V OUT

L

Q26

4/4

X25-B/6

-E3

0V

0V

0V

0V

0V

0V

0V

1.6V

1.6V

1.6V

-7.0V

5.0V

5.0V

0V

5.0V

0V

0.6V

-5.2V

0.6V

0V

-14.2V

0V

0V -5.2V

0V

-5.2V

5.0V

-5.2V

5.0V

4.9V

0V

4.9V

0.6V

7.2V

R508

100K

4 S DATA9

330

R624

R625 100K

100K

R626

10

R627 100K

330

R628

100K

R629

29

Q26

Rch

+5V

-5V

+5V

+5V

+5V

+5V

+5V

+5V

+5V+5V+5V

+5V +5V

+5V

-5V

-5V-5V

+14V

+14V

-5V

+5V

+5V

+14V

-14V

-5V

+5V

-14V

+14V

+5V

-5V

+14V

-14V

-5V

+5V

-14V

-5V

+14V

+5V +5V

-14V

-5V

+14V

L25

0V

A

E

B

C

D

IC30

(3/4)

LD-K300V(M) (1/4)

IC30

(4/4)

IC30

(1/4)

IC30

(2/4)

MUTE

AMP

BUFFER
(AC-3 SIGNAL)

(DC OFFSET
ON/OFF)

SWITCH

CN11

D25

D24

INVETER
NORMAL)

(KARAOKE/

CAUTION: For continued safety, replace safety critical components only with manufacturer's
recommended parts (refer to parts list). indicates safety critical components. For continued
protection against risk of fire, replace only with same type and rating fuse(s). To reduce the risk of
electric shock, leakage-current or resistance measurements shall be carried out (exposed parts are
acceptably insulated from the supply circuit) before the appliance is returned to the customer.

The DC voltage is an actual reading measured with a high impedance type voltmeter. The
measurement value may vary depending on the measuring instruments used or on the product. Refer
to the voltage during LD PLAY unless otherwise specified; The value shown in ( ) is the voltage
measured at the moment of STOP. The voltage followed by (CD) refers to the value during CD PLAY.

2SA954
2SC2003

2SC2458

2SC2878

TA8410AK NJM2903M

NJM4565M

2SA1576
2SC2714
2SC4081

DAN202U DAP202U

DA204U

2SK163 HM62256BLFP12T TC74HCT7007AFE

UN4212
2SC3311A

UN5212

TC9210PDTC124ESA

NJM2058M
TC74HCU04AF
TC74HC00AFE
TC74HC14AFE
TC74HC74AF

CA0002AM

NJU3715G LC78630E

LA9420M
PD0192A

NJM4565L

LA9425

TC4053BF

PD0011A-SP

LD-K300V

Y22-7123-00