JVC KB2U Schematic

SCHEMATIC DIAGRAMS

COMPACT COMPONENT SYSTEM

MX-KB2,MX-KB15

CD-ROM No.SML200408

Contents

Wiring diagram
Block diagram
Standard schematic diagrams
Printed circuit boards

COPYRIGHT 2004 Victor Company of Japan, Limited.

Area suffix

C ------------------------- Canada

2-2
2-4
2-6

2-18 to 22

No.MB287SCH

2004/8

In regard with component parts appearing on the silk-screen printed side (parts side) of
the PWB diagrams, the parts that are printed over with black such as the resistor ( ),
diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety.

< MEMO >

2-1

C

8

0

2

Wiring diagram

AC CORD P/N.: 30-00300-00L
(AC 120V - 60 Hz)

FM ANT

Tuner board

P/N:11-01002-03

P/N:20-61030-00

3 PIN UL2547#30 P=2 L=360 mm

A PLAY HEADER

LOGIC DECK CONTROL BUS

AUX INPUT

SJ500

CN504

AUX input board

J601J602

AM ANT

TU-R

AGND

TU-L

+12V

+5.6V

DGND

STEREO

CD-EN

PLL-DAT

PLL-CLK

PLL-PER

RDS-CLK

RDS-DAT

CN601

P/N:20-61070-00 7 PIN UL2854#30 P=2L=360 mm

LOGIC DECK

B R/P HEADER

P/N:25-61260-80 13 PIN UL2896 P=1.25 L=260 mm

P/N:11-01002-05

Transformer

P/N:15-01002-00

P/N:20-61030-02

3P UL547#30 P=2 L=300 mm

P/N:20-61133-01

13P UL2547+2651 P=2 L=370 mm

CN202

CN101

L-IN
AGND
R-IN

R.CH­R.CH+
GND
L.CH+
L.CH­GND
E-S

CN103

GND
NIL
SOL-B
B-M-SW
B-T-SW
PHO-B
REC-SW
T-MOTOR
A-T-SW
GND
PHO-A
SOL-A

A-M-SW

TU-R

AGND

P/N:20-61073-11

7P UL2547+2651 P=2 L=250 mm

TU-L

+12V

+5.6V

DGND

STEREO

CD-EN

PLL-DAT

PLL-CLK

PLL-PER

RDS-CLK

RDS-DAT

CN205

CN201

AC7

CN803

ECO
HP-M
MUTE
STBY
L-OUT
GND
R-OUT

AC6

P/N:2
2 PIN

AC9

CN110

L-IN

R-IN

GND

Main board

P/N:11-01002-00

AC2

AC1

-27V

KEY2

JOG-B

JOG-A

IR-IN

D-STB

D-CLK

D-DAT

+5.6V

CGND

CN20

OL-DET

OL-PROT

KEY1

CN207

2-2

P/N:25-83100-02

2PIN UL2651#28 P=2 L=100 mm

Display & Key

CN511

CN510

Top left key

P/N:11-01002-12

Left key

P/N:11-01002-10

2PIN UL2468#26

P/N:25-94060-80

CN509

CN503

CN505

IR1
GND
IR3
LED+

P/N:20-41130-00
13 PIN UL2651#28 P=2 L=

CN500

AC1

AC2

-27V
IR-IN

KEY2

KEY1

+5.6V

CGND

D-STB

D-CLK

D-DAT

JOG-A

JOG-B

Main key

P/N:11-01002-09

P/N:20-41040-00

4 PIN UL2651#28 P=2 L=50 mm

AC1

P/N:20

61073

11

-

-

7P UL2547+2651 P=2 L=250 mm

CN803

AC7

AC6

CN802

AC9

Power board

P/N:11-01002-16

P/N:20-42110-00

11PIN P=2.5 L=250 mm

AC5

AC10

AC11

AC8

AC3

CN861

CN801

CN804

GND1

P/N:20-45041-80

4P UL1007#20 L=250 mm

CN901

P/N:20-41051-37

5P UL2651#28 L=500 mm

Speaker board

P/N:11-01002-06

CN902

Headphone board

P/N:11-01002-05

R

L

CN201

ECO

CN205

110

Main board

P/N:11-01002-00

HP-M
MUTE
STBY
L-OUT
GND
R-OUT

OL-DET

OL-PROT

+9V

+5V

AC1

AC2

-27V

+12V

+5.6V

AGND

DGND

DGND

CGND

P/N:20-41020-00
2 PIN UL2651#28 P=2 L=250 mm

P/N:20-51061-20
6 PIN UL1571#30 P=2 L=100 mm

CN208

FM-

SLT

DM-

FM+

DM+

GND

CN402

16.V-CEN

15. COM

8. GND

14. E

13. D

12. A

11. B

10. C

7. LD

6. VR

5. PD

4. F+

3. T+

CD DECK

P/N:25-61135-80

CN401

16 P Ul2896 P=1 L=135 mm

PICK UP

3CD MODULE

9. F

2. T-

1. F-

CN204

SW2

GND

SW1

RL-

RL+

+5V

EMT

CATH

MO-

CN206

AC2

CGND

-27V

KEY1

KEY2

JOG-B

JOG-A

IR-IN

D-STB

D-CLK

D-DAT

+5.6V

CN207

RL-

+5V

RL+

MO-

SW1

EMT

SW2

MO+

GND

CATH

P/N:20-41101-24

10 PIN UL2651#28 P=2 L=250 mm

Motor board

MO+

CW3

P/N:20-41130-00
13 PIN UL2651#28 P=2 L=250 mm

CN500

AC1

AC2

-27V
IR-IN

KEY2

KEY1

+5.6V

CGND

D-STB

D-CLK

D-DAT

JOG-A

JOG-B

Main key

P/N:11-01002-09

P/N:20-41040-00

4 PIN UL2651#28 P=2 L=50 mm

Display board
P/N:11-01002-07

P/N:25-83050-05

5 PIN UL2651#28 P=2 L=50 mm

CN501

KEY1

KEY2

CGND

JOG-A

JOG-B

CGND

KEY1

KEY2

CN502

JOG-A

JOG-B

CN506

P/N:25-94060-80
2 PIN UL2468#26

Top light key

P/N:11-01002-13

Right key board

P/N:11-01002-11

CN512

CN508

Remote receive

P/N:11-01002-14

CN514

CN513

P/N:25-83100-02

2P UL2651#28 P=2 l-100 mm

2-3

Block diagram

0

O

5

d
t

e

Key board section

CD2

S501

VFD CONTROL / DRIVER

SC6122

REMOTE RECEIVER

ENCODE VOLUME

45

EN500

321

+9V

U101

TA8189
4CH Pre+Rec
AMP with ALC

BIAS OSC

R/P SWITCH CIRCUIT

LOGIC DECK-TP

IC602

TA2149BFN

IF

IC600

TC9257 PLL

JOG-A
JOG-B

H CASS A
L CASS B

REC-E
H-PLAY

L-REC

+9V

VFD

KEY2

KEY1

U500 SC6311

KEY SCAN

CLK

DATA

CPU

87EP26F-4K76

STB

REC SIGNAL

OUTPUT

Filament

AC3.3V

+5V

STANDBY LED

GVSW

CDR-W GAIN

CONTROL

+5V

VCC

DATA AND CONTROL

U406

TC74HC14

STB
DATA

CK

L CH

R CH

+5V

R503

680R

LED500

BUS

L CH

R CH
SDA

REQ

SCL

L CH

R CH

U201 TC9422F

SYSTEM E.VOLUME

(Tone control input

selector Main volume)

SYS_MUTE

PICKUP

EDA

U402 TA2153

RF AMPLIFIER

RF

DIGITAL SERVO

1 BIT D/A CONVERTER

U404 TC94A02F

CD ROM DECODE

MP3 DECODE

D/A CONVERTER

D803

IN4001

F

B

C

LD

FEO

RFCT

RFPP

U401 TC9462

+9V

R832

10k

R83110k

Q812

8050

LIMIT SW

Q813

8050

F-

+5V

FOO
TRO
DMO

FMO

ADDRESS BUS

DATA BUS

VDD 3V

VDOT 3.3V

+VC

IC801 STK402-050

LOW LOGIC DETECT

PROTECT ENABLE

Q860,Q861,Q864,Q865

DETECT

OVERLOAD

-VC

ENABLE

PROTECT

DIGITAL SERV

When use hea

the control vol

T-

T+

F+

U403 TA2

U405 SRAM

128k x 8 (1

logic low l

2-4

AUX INPUT

L CH

R CH

+9V

0
2

n

TO 3CD DECK

T+

F+

403 TA2092N

L SERVO DRIVER

5 SRAM (SDJ)
8k x 8 (15ns)

+9V

VDD 3.3V

FM-

FM+

123456

CN402

123456

TO CD DECK

DM-

DM+

+VC

-VC

SLT

D849-D852

R241

10k

M-

M+

R242

IN2

U203 TA7219S

BRIDGE DRIVER

IN1

10k

EMIT

R233

10k

ML+

IN1

U202 TA7219S

BRIDGE DRIVER

IN2

ML-

R232

10k

3CD CHANGER DRIVER SECTION

SW1

SW2

CN204

1

2

3

4

5

6

7

8

9

10

AC PLUG

MO+

MO-

CATH

EMIT

+5V

RL+

RL-

SW1

GND

SW2

+12V

+9V

HEADPHONE

CE803

100uP/50V

Q862

8550

+12V

D806-D809

L7809CV

Q803

D845

IN4001

U803

L7806CV

AC7

AC10

AC12

AC11

AC8

AC9

AC5

T802

T06910A

1

7

86543211

!

TRANSFORMER

10

AC3

AC4

9

!

F804

T2.0A/250V

R862

10k

use headphone

ontrol voltage is

gic low level

R877

22k

Q867

8050

GRID VOLTAGE -27V

AC 3.3V

FILAMENT VOLTAGE

+6V TO CPU

2-5

PRE_AMP

AMP
STK402-050

Standard schematic diagrams

Primary / Power amp section

2-6

PROTECT CIRCUIT

!

!

!

!

!

!

!

!

2-7

Main section

80

3835-C

81

82

83

3835-AIN

84

85

86

87

88

89

90

91

92

93

94

95

96

PLL-DAT

97

PLL-CLK

98

PLL-PER

99

VDD

100

Vss

XOUT

123456789

79

78

77

76

75

74

73

72

71

70

69

68

67

66

65

64

63

62

61

60

59

58

57

56

55

54

53

52

51

T-A/B

A-PHP

B-CUT

3835-B

3835-A

OL-DET

PRO-EN

XIN

REST

XT-OUT

XT-IN

TEST

MP3-SCLK

U300

87EP26F-4K76

F-SHIFT

REMOTE

MUTE

VFD-CLK

VFD-FTB

VFD-DAT

ESS-CLK

101112131415161718192021222324252627282930

A-PHO

B-T-SW

A-M-SW

T-MOTO

MP3-REQ

MP3-SDAT

ESS-DAT

ESS-STB

REC-EN

SOL-A

SOL-B

ECO

VOL-STB

POWER

MR+

VDD

50

JOB-B

JOB-A

B-PHO

VOL-DAT

B-M-SW

VOL-CLK

REC-SW

RDS-CLK

REC-SW

D-SEN

Vss

49

BOOT

48

VREF

47

KEY1

46

KEY2

45

KEY3

44

POW-D

43

STEREO

42

RDS-DAT

41

SW2

40

SW1

39

STL

38

MD+

37

MD-

36

DUCK3

35

DUCK2

34

DUCK1

33

BUCK0

32

DUCK

31

CEE

MR-

CD.RW

CD.RES

2-8

NF2

ME/02

PRE/02

U101 TA8189N

NF1

ME/01

PRE/01

19181716151413

A/B

DET

VCC

MIX/0

AGND

M/N

2423222120

CH2/A

CH2/B

CH1/A

CH1/B

123456789

REC/01

REC/02

101112

ALC

RNF

REC/I1

CNF

REC/I2

GND

123

4

123456789

101112

13

2-9

Display / Key control section

3CD 08 00:08

FROM MAIN PCB

MAIN KEY BOARD

STANDBY LED

DISPLAY BOARD

2-10

ENCODER VOLUME

KEY BOARD

RIGHT KEY BOARD

LEFT KEY BOARD

TOP RIGHT KEY BOARD

TOP LEFT KEY BOARD

2-11

TO MCU

CD section

2-12

U401

TC9462F

TO

CD

DECK

TO PICK UP

2-13

MP3 section

SDA

REQ

SCL

TO MCU

646362616059585756555453525150

XI

XO

VSSX

1

RESET

2

MIMD

3

AD0

4

AD1

5

SDA

6

SCL

7

AD2

8

VDDT

9

SD0

10

AD3

11

AD4

12

SDIO

13

BCKIA

14

LRCKIA

15

AD5

16

CE

DE

VDD

171819202122232425262728293031

STANDBY

VDDX

VSS

CKO

VDDP

VSSL

VRALLOVDAL

PDO

VCOI

U404

TC94A02F

VSSP

VDARROVRAR

49

ID6

IO7

IO5

IO4

IO3

CKS

AD12

IO2

48

VSS

47

IO1

46

IO0

45

AD15

44

AD16

43

WR

42

AD14

41

AD13

40

VSS

39

REQ

38

AD6

37

AD7

36

AD8

35

VDDT

34

AD9

33

AD10

AD11

32

VSSR

VDD

TESTP

2-14

1645141312111098765432

IO3

IO2

IO1

AD0

AD1

AD2

AD3

AD4

AD5

GND

CE1

IO5

48

47

1

46

0

45

5

44

6

IO4

171819202122232425262728293031

AD10OEAD11

IO6

IO7

IO8

AD6

AD9

AD8

AD7

AD12

AD13WECE2

AD14

AD15

AD16

1

NC

VDD

32

43

42

4

41

3

40

39

38

6

37

7

36

8

35

34

9

33

0

2-15

P

Tuner section

RGND FM-RF LOW

CUT

MIX

VCC AM-IF FM-IF GND AGC Q

OUT

IC602 TA2149BFN

M

DET-OUTIF-REQSTDSC-OUTAM-OSCFM-OSCAM-RFRF-VCCFM-RF/O

2-16

AM-IF FM-IF GND AGC QUAD R/OUT L/OUT

2 TA2149BFN

LPF2LPF1MPX-INDET-OUTIF-REQSTDSC-OUT

TU_R

AGND

TU_L

+12V

+5.6V

DGND

ST

CD_EN

PLL_DATA

PLL_CLK

PLL_PER

NOTES:

ALL OF THE VOLUME OF THE COMPONENT VOLTAGE

TESTED AT THE FM MODE. NO SIGNAL INPUT STATUS

2-17

Printed circuit boards

Main board

(forward side)

2-18

(reverse side)

2-19

Display board

(forward side)

(reverse side)

2-20

Tuner board

(forward side)

(reverse side)

2-21

Trans board

(forward side)

!

!

!

!

!

!

(reverse side)

2-22

< MEMO >

2-23

Victor Company of Japan, Limited

AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.MB287SCH)

Printed in Japan

WPC