JVC MX KB2 Service Manual

SCHEMATIC DIAGRAMS

COMPACT COMPONENT SYSTEM

MX-KB2

CD-ROM No.SML200408

Contents

Wiring diagram Block diagram Standard schematic diagrams Printed circuit boards

Area suffix

B ------------------------------ U.K. E ---------- Continental Europe EN ----------- Northern Europe EV ------------- Eastern Europe

2-1 2-2 2-3

2-10 to 13

No.MB259SCH

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.

Wiring diagram

1).

2).

AUX INPUT

SJ500

AUX INPUT PCB P/N:11-01002-05

CN504

REMARK:

AC CORD

E/EN/EV Version AC Cord P/N.: 30-00300-01L

B Version AC Cord P/N.: 30-00300-02L

TRANSFORMER

P/N:15-01002-02

P/N:20-61073-11

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

CN803

CN802

POWER PCB

P/N:11-01002-01

CN801

P/N:20-42110-00

11P UL1007#22 P2.5 L=250mm

CN861

CN804

P/N:20-41051-37

5P UL2651#28 L=500mm

P/N:20-45041-80

4P UL1007#20 L=250mm

CN901

P/N:11-01002-06

R

SPEAKER PCB

L

FM ANT

TUNER PCB

P/N:11-01002-02

P/N:20-61030-00

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

LOGIC DECK

A PLAY HEADER

LOGIC DECK CONTROL BUS

DISPLAY & KEY

P/N:20-61030-02

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

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:25-61070-00 7 PIN UL2854#30 P=2 L=360 mm

B R/P HEADER

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

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

P/N:20-61133-01

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

TU-L

+12V

+5.6V

DGND

STEREO

CD-EN

PLL-DAT

R-IN

GND

PLL-CLK

PLL-PER

RDS-CLK

CN110

L-IN

RDS-DAT

CN205

AC1

CN201

MAIN PCB

P/N:11-01002-00

AC2

-27V

CGND

+5.6V

D-DAT

D-CLK

D-STB

IR-IN

JOG-A

JOG-B

KEY2

KEY1

CN207

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

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

+9V

+5V

+12V

+5.6V

AGND

DGND

CGND

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

CN208

SLT

FM+

SW2

GND

SW1

GND

RL-

+5V

RL+

MO-

EMT

MO+

CATH

OL-DET

OL-PROT

CN206

AC1

AC2

-27V

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

CN402

FM-

DM-

DM+

16.V-CEN

15. COM

14. E

13. D

12. A

11. B

10. C

9. F

8. GND

7. LD

6. VR

5. PD

4. F+

3. T+

2. T-

1. F-

CN204

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

P/N:25-61135-80 16 P Ul2896 P=1 L=135 mm

CN401

P/N:20-41101-24

CD DECK

PICK UP

HTAC

DNG

+OM

1WS

2WS

TME

-OM

+LR

V5+

-LR

MOTOR PCB

3CD MODULE

CW3

P/N:25-83100-02 2PIN UL2651#28P=2L=100mm

HEADPHONE PCB

P/N:11-01002-05

CN902

CN511

CN510

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

TOP LEFT KEY

P/N:11-01002-12

LEFT KEY

P/N:11-01002-10

CN509

CN503

CN505

IR1 GND IR3 LED+

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=50mm

DISPLAY BOARD P/N:11-01002-07

P/N:20-83050-05

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

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 RIGHT KEY P/N:11-01002-13

RIGHT KEY BOART P/N:11-01002-11

CN512

CN514

CN508

REMOTE RECEIVE P/N:11-01002-14

CN513

P/N:25-83100-02

2P UI2651#28 P=2 L=100mm

2-1

Block diagram

KEY BOARD SECTION

CD 2

S501

SC6122

REMOTE RECEIVER

ENCODE VOLUME

45

EN500

3

2

1

+9V

U101

TA8189

4CH Pre+Rec

AMP Wit h ALC

BIAS OSC R/P SWITCH

INVERTER CIRCUIT

LOGIC DECK-TP

FM RECEIVER

HEADER

IC 602

TA2099N

IF

IC 600

TC9257 PLL

AUX INPUT

JOB-A JOB-B

H CASSETTE A L CASSETTE B

REC-E

H-PL AY L-REC

+9V

KEY2

VFD

KEY1

U500 SC6311

VFD CONTROL / DRIVER

KEY SCAN

STB

DATA

CLK

CUP

87EP26F-4K76

REC SIGNAL OUTPUT

FIL AMENT

AC3.3V

+5V

STANDBY LED

CDRW GAIN CONTROL

+5V

VCC

DATA AND CONTROL BUS

U406

TC74HC14

STB DATA

CK

L CH R CH

L CH

R CH

L CH

R CH

+5V

R503

680R

LED500

GVSW

L CH

R CH

SDA

REQ

SCL

L CH

R CH

U201 TC9422F

SYSTEM ELECTRONIC VOLUME

(Tone control Input

selector Main volume)

SYS_MUT

PICK UP

A

B

D

E

U402 TA2153

RF AMPLIFIER

R F

RFCT

RFPP

FEO

U401 TC9462

DIGI TAL SERVO

1 BIT DA CONVERTER

U404 TC94A02F

CD ROM DECODE

MP3DE CODE

DA CONVERTER

R832

10K

R831

10K

D803

IN4001

C

+9V

Q812 8050

+9V

LD

F

R241 10K

Q813 8050

LIMIT SW

+5V

FOO TRO DMO

FMO

ADDRESS BUS

DATA BUS

VDD 3V

VDOT 3.3V

-VC

+VC

IC801 STK402-050

LOW LOGIC DETECT

PROTECT ENABLE

Q860.861.864.865

DETECT

OVERLOAD

ENABLE

PROTECT

F-

T+

T-

F+

U403 TA2092N

DIGI TAL SERVO DRIVER

U405 SRAM (SDJ)

128K X 8 (15ns)

WHEN USE HEAD PHONE THE CONTROL VOLTAGE

IS LOGIC LOW LEVEL

+9V

VDD 3.3V

CN402

HEAD PHONE

Q862 8550

R862

10K

R877

22K

Q867

5050

TO CD DECK

DM+

1

2

1

2

DM-

+12V

GRID VOLTAGE-27V AC 3.3V FILAMENT VOLTAGE +6V TO CUP

3

4

3

4

FM+

+VC

-VC

+12V

+9V

CE803

100UP / 50V

SLT

FM-

ECO POWER ON ECO LOGIC LOW LEVEL

5

6

D849- D852

D806- 809

L7809CV

Q803

D845 IN4001

U803

L7806CV

M-

M+

EMIT

ML+ IN 1

ML-

SW1

SW2

AC5

AC6

AC7 AC8

AC10 AC9 AC12

AC11

D810- D814

R242 10K

T06910A

1

11

2 3

4 5

6 7

8

IN2

U203 TA7291S

BRIDGE DRIVER

IN1

IN2

U202 TA7291S

BRIDGE DRIVER

R233 10K

R232 10K

3CD CHANGER DRIVER SECTION

TRANSFORMER

!

T802

TR801

R841

10K

AC3

AC4

Q822 8050

10

RL802

9

Q809

8050

C801

0.01U/250V

!

CE868

10UF/25V

R842 10K

R814 10K

L803

TO 3CD DECK

+6V

CN204

1

2

3

4

5

6

7

8

9

10

AC PLUG

!

L804

T4.0A L250V

MO+

MO-

CATH

EMIT

+5V

RL+

RL-

SW1

GND

SW2

2-2

Standard schematic diagrams

Power amp. / Primary section

METAL FILM RESISTORS NONFLAME FUSIBLE

AC PLUG

!

AMP STK402-050

PROTECT CIRCUIT

! !

!

2-3