Jvc Kd-s721r User manual

SERVICE MANUAL

CD RECEIVER

No.49693

Feb. 2002

KD-S723R/KD-S721R

Area Suffix

E -------- Continental Europe

EX ------------ Central Europe

Contents

Safety precaution

Preventing static electricity

Important for laser products

Location of main parts

Disassembly method

1-2

1-3

1-4

1-5

1-6

Adjustment method

Flow of functional

operation unit TOC read

Maintenance of laser pickup

Replacement of laser pickup

Description of major ICs

1-11

1-12

1-14

1-15

COMPACT

DIGITAL AUDIO

KD-S721R

KD-S723R

4

¢

SCMMODE

RNDRPTMO AM

FM

TP/PTY

SEL CD

DISP 87910 11 12

4

¢

SCMMODE

RNDRPTMO AM

FM

TP/PTY

SEL CD

DISP 87910 11 12

KD-S723R LCD Color,Button Illumination--- Amber

KD-S721R LCD Color,Button Illumonation--- Green

Difference point

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1-2

KD-S723R/KD-S721R

!Burrs formed during molding may be left over on some parts of the chassis. Therefore,

pay attention to such burrs in the case of preforming repair of this system.

Safety precaution

!Please use enough caution not to see the beam directly or touch it in case of an

adjustment or operation check.

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1-3

KD-S723R/KD-S721R

Conductive material

(conductive sheet) or iron plate

(caption)

Anti-static wrist strap

Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,

can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.2. Handling the traverse unit (optical pickup)

1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup.For specific

details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse

unit. Be careful not to take too long a time when attaching it to the connector.

3. Handle the flexible cable carefully as it may break when subjected to strong force.

4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it

1.1.3. Handling the optical pickup

1. In order to maintain quality during transport and before installation, both sides of the laser diode on the

replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.

(Refer to the text.)

2. Do not use a tester to check the condition of the laser diode in the optical pickup.The tester's internal power

source can easily destroy the laser diode.

1.1.2. Ground yourself

1. Use an anti-static wrist strap to release any static electricity built up in your body.

1.1.1. Ground the workbench

1. Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over

it before placing the traverse unit (optical pickup) on it.

1.1. Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.

Be careful to use proper grounding in the area where repairs are being performed.

FD screw

Feed motor ass’y

FD gear

Pickup unit

Shorting Short circuit land

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1-4

KD-S723R/KD-S721R

Important for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the

Laser Unit. Do not disassemble the Laser Unit. Replace

the complete Laser Unit if it malfunctions.

4.CAUTION : The compact disc player uses invisible

laserradiation and is equipped with safety switches

whichprevent emission of radiation when the drawer is

open and the safety interlocks have failed or are de

feated. It is dangerous to defeat the safety switches.

5.CAUTION : If safety switches malfunction, the laser is able

to function.

6.CAUTION : Use of controls, adjustments or performance of

procedures other than those specified herein may result in

hazardous radiation exposure.

VARNING : Osynlig laserstrålning är denna del är öppnad

och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet

alttiina näkymättömälle lasersäteilylle.Älä katso

säteeseen.

ADVARSEL : Usynlig laserstråling ved åbning , når

sikkerhedsafbrydere er ude af funktion. Undgå

udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når

sikkerhetsbryteren er avslott. unngå utsettelse

for stråling.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

DANGER : Invisibie laser

radiation when open and

interlock or defeated.

AVOID DIRECT EXPOSURE

TO BEAM (e)

VARNING : Osynlig laser-

strålning är denna del

är öppnad och spårren är

urkopplad. Betrakta ej

strålen. (s)

VARO : Avattaessa ja suo-

jalukitus ohitettaessa olet

alttiina näkymättömälle

lasersäteilylle.Älä katso

säteeseen. (d)

ADVARSEL :Usynlig laser-

stråling ved åbning , når

sikkerhedsafbrydere er ude

af funktion. Undgå udsæt

telse for stråling. (f)

CLASS 1

LASER PRODUCT

!

CAUTION

Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

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1-5

KD-S723R/KD-S721R

Main unit

Location of main parts

Control unit

CD mechanism

Display LED & key control board

Main board

Tuner

pack

Main board Connector to controller

Power IC

ISO connector Antenna jack

Loading motor

Mechanism relay board

Damper

Pickup unit

Damper Feed motor

Spindle motor

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1-6

KD-S723R/KD-S721R

Disassembly method

Removing the front panel unit(See Fig.1)

1. Insert a screwdriver to the joints a on the side of the

front chassis and two joints b on the right side, then

detach the front chassis toward the front side.

1. Press the release button and remove the front

panel unit in the direction of the arrow.

Removing the front chassis (See Fig.2)

Removing the heat sink (See Fig.3)

1. Remove the three screws A attaching the heat sink

on the left side of the body, and remove the heat

sink.

Removing the bottom cover (See Fig.4)

1.

2.

Turn the body upside down.

Insert a screwdriver to the two joints c and two

joints d on both sides of the body and the joint e on

the back of the body, then detach the bottom cover

from the body.

b

a

b

A

Heat sink

c

d

e

Fig.2

Fig.1

Fig. 3

Fig. 4

Bottom cover

Front chassis

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1-7

KD-S723R/KD-S721R

Removing the main amplifier board

(See Fig.5 and 6)

1.

2.

3.

4.

5.

Remove the front chassis.

Remove the bottom cover.

Remove the two screws B attaching the main

amplifier board assembly on the bottom of the body.

Remove the three screws C attaching the main

amplifier board assembly on the back of the body.

Disconnect connector CN501 on the main amplifier

board assembly from the CD mechanism assembly.

Removing the CD mechanism assembly

(See Fig.7)

1.

2.

3.

4.

Remove the front chassis.

Remove the bottom cover.

Remove the main amplifier board assembly.

Remove the three screws D attaching the CD

mechanism assembly from the top cover.

Removing the control switch board

(See Fig.8 and 9)

1.

2.

3.

Remove the front chassis.

Remove the four screws E attaching the rear cover

on the back of the front panel unit.

Remove the control switch board from the front

panel unit.

C

Fig.5

Fig. 6

B

C

CD mechanism assembly

D

DD

Top cover

Fig. 7

EE

Fig. 8

Fig. 9

Control switch board

CN501

Main amplifier board

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1-8

KD-S723R/KD-S721R

Unsolder the part aand bon the CD mechanism

control board.

Remove the stator fixing the CD mechanism control

board and the damper bracket (To remove the stator

smoothly, pick up the center part).

Remove the screw Aattaching the CD mechanism

control board.

Remove the CD mechanism control board in the

direction of the arrow while releasing it from the two

damper bracket slots dand the front bracket slot e.

Disconnect the flexible wire from connector on the

pickup unit.

1.

2.

3.

4.

5.

Removing the CD mechanism control

board (See Fig.1 and 2)

Turn the FD gear in the direction of the

arrow to move the entire pickup unit to

the appropriate position where the

flexible wire of the CD mechanism unit

can be disconnected easily.

(Refer to Fig.2)

ATTENTION:

Prior to performing the following procedure, remove

the CD mechanism control board.

Remove the two springs fattaching the CD

mechanism assembly and the front bracket.

Remove the two screws Band the front bracket

while pulling the flame outward.

Remove the belt and the screw Cfrom the loading

motor.

1.

2.

3.

Removing the loading motor

(See Fig.3 to 5)

Fig.2

Fig.3

Fig.4

Shift the lock

Flexible wire

Pickup unit

FD gear

CD mechanism control board

Loading motor Front bracket

Front bracket Pull outward

Pull outward

Flame

f

B

f

B

Fig.5

C

Loading motor

Belt

Fig.1

Front bracket CD mechanism

control board

Damper bracket

h

c

d

b

a

DD

D

CD mechanism assembly

Ae

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1-9

KD-S723R/KD-S721R

Prior to performing the following procedure, remove

the CD mechanism control board and the front

bracket (loading motor).

Remove the three screws Dand the damper

bracket.

Raise the both sides fix arms and move the fix plates

in the direction of the arrow to place the four shafts g

as shown in Fig.8 and 9.

Remove the CD mechanism assembly and the two

springs hattaching the flame.

Remove the two screws Eand both sides rear

damper brackets from the dampers. Detach the CD

mechanism assembly from the left side to the right

side.

1.

2.

3.

4.

Removing the CD mechanism assembly

(See Fig.1, 6 to 9)

The CD mechanism assembly can be

removed if only the rear damper

bracket on the left side is removed.

ATTENTION:

Fig.6

Fig.7

Fig.8

Fig.9

Rear damper bracket

Fix arm (R)

Damper

DD

Damper bracket

CD mechanism

assembly

Flame h

h

D

Fig.5

Front bracket CD mechanism

control board

Damper bracket

h

c

d

b

a

DD

D

CD mechanism

assembly

Ae

Fix plate (L)

g

Rear damper bracket Fix arm (L)

Damper

E

Fix plate(R)

E

g

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1-10

KD-S723R/KD-S721R

Prior to performing the following procedure, remove

the CD mechanism control board, the front bracket

(loading motor) and the CD mechanism assembly.

Remove the two screws Fand the feed motor

assembly.

1.

Removing the feed motor assembly

(See Fig.10)

Prior to performing the following procedure, remove

the CD mechanism control board, the front bracket

(loading motor), the CD mechanism assembly and

the feed motor assembly.

Detach the FD gear part of the pickup unit upward.

Then remove the pickup unit while pulling out the

part iof the FD screw.

1.

Remove the screw Gattaching the nut push spring

plate and the pickup mount nut from the pickup unit.

Pull out the FD screw.

2.

Removing the pickup unit

(See Fig.10 and 11)

When reattaching the pickup unit,

reattach the part jof the pickup unit,

then the part iof the FD screw.

ATTENTION:

Prior to performing the following procedure, remove

the CD mechanism control board, the front bracket

(loading motor), the CD mechanism assembly and

the feed motor assembly.

Turn up the CD mechanism assembly and remove

the two springs kon both sides of the clamper arms.

Open the clamper arm upward.

Turn the turn table, and remove the two screws H

and the spindle motor.

1.

2.

Removing the spindle motor

(See Fig.12 and 13)

Fig.10

Fig.11

Fig.12

Fig.13

Spindle motor

kk

Pickup unit

Part i

FD screw

Feed motor assembly

FD gear Pickup unit

Part j

F

Nut push spring plate

Pickup mount nut

Pickup unit

FD screw

G

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1-11

KD-S723R/KD-S721R

Adjustment method

Test instruments required for adjustment

1. Digital oscilloscope (100MHz)

2. AM Standard signal generator

3. FM Standard signal generator

4. Stereo modulator

5. Electric voltmeter

6. Digital tester

7.Tracking offset meter

8.Test Disc JVC :CTS-1000

9. Extension cable for check

EXTGS004-26P 1

Standard measuring conditions

Power supply voltage DC14.4V(10.5~16V)

Load impedance 4 (4 to 8 allowance)

Output Level Line out 2.0V / 20 k (Vol. MAX)

How to connect the extension cable for adjusting

Dummy load

Exclusive dummy load should be used for AM,and FM. For

FM dummy load,there is a loss of 6dB between SSG output

and antenna input.The loss of 6dB need not be considered

since direct reading of figures are applied in this working

standard.

Standard volume position

Balance and Bass &Treble volume : lndication"0"

Loudness : OFF

BBE : OFF

Frequency Band

FM 87.5MHz ~ 108.0MHz

MW 522kHz ~ 1620 kHz

LW 144kHz ~ 279kHz

EXTGS004-26P

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1-12

KD-S723R/KD-S721R

Power ON

Set Function to CD

Play

Jump to the first track

TOC readout

Tracking loop closed

Disc rotates

Disc inserted

YES

Laser emitted

Pickup feed to the inner area

Focus search

RF signal eye-pattern

opens

RF signal eye-pattern

remains closed

"No disc"

display

•When correctly focused

Focus Servo Loop ON

•When the laser diode correctly

emits

Microprocessor

commands

Rough Servo Mode

CLV Servo Mode

(ProgramArea)

CLV Servo Mode

(Lead-In Area;

Digital: 0)

•RF signal

Flow of functional operation untilTOC read

•When the pickup correctly moves

to the inner area of the disc

TERMINAL

Microprocessor

commands

FMO

TC9462 "53"

FEED MOTOR

+TERMINAL

IC501 "10"

REST SW

•When the disc correctly rotates

Tracking Servo Loop ON

Servo CLV

Rough

Servo

AccelerationAcceleration

Microprocessor

commands

Spindle

motor (-)

IC501 "7"

0.5 Sec 0.5 Sec

1

FEO

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1-13

KD-S723R/KD-S721R

Feed Section

Focus Section

Tracking Section

Spindle Section

Is the voltage output at

IC541 pin "53" 5V or 0V?

Check the feed motor.

Is 4V present at both

sides of the feed motor?

Is the wiring for IC541

(90) ~ (100) correct?

Check IC501.

Is 6V or 2V present at

IC501 "10" and "11"?

Is 5V present at IC501

pin "20"?

Check the feed motor

connection wiring.

Check the vicinity of

IC541.

Check CD 9V

and 5V.

YES

NONO

NO

YES

When the lens is

moving: Check the circuits in

the vicinity of IC501

pins "14" ~ "18".

Check the pickup and

its connections.

NO

YES

Does the S-search

waveform appear at

IC501 pins "6" and "7"?

Is the disk rotated?

Does the RF signal

appear at TP1?

Is 4V present at IC501

pins "8" and "9" ?

Check the spindle motor

and its wiring.

Is 4V present at IC541

pin "55" ?

Check the vicinity of

IC501.

Check IC521 and

IC541.

YES

NO

NO NO

YES

Check the circuits in the

vicinity of IC521 "2" ~ "7",

"18"~"24" or the pickup

Is the RF waveform at TP1

distorted?

Proceed to the Tracking

section

When the disc is rotated

at first: Check the circuit in the

vicinity of IC521 pins

"2" ~ "12".

Check IC521.

Check the pickup and

its connections.

YESYES

YES

Is the tracking error signal

output at IC521 "12"?

Approx. 1.2 V

4V

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1-14

KD-S723R/KD-S721R

Maintenance of laser pickup

(1) Cleaning the pick up lens

Before you replace the pick up, please try to

clean the lens with a alcohol soaked cotton

swab.

(2) Life of the laser diode

When the life of the laser diode has expired,

the following symptoms will appear.

(1) The level of RF output (EFM output:ampli

tude of eye pattern) will be low.

Replacement of laser pickup

Is RF output

1.0 0.35Vp-p? Replace it.

NO

YES

O.K

(3) Semi-fixed resistor on the APC PC board

The semi-fixed resistor on the APC printed

circuit board which is attached to the pickup

is used to adjust the laser power.Since this

adjustment should be performed to match the

characteristics of the whole optical block,

do not touch the semi-fixed resistor.

If the laser power is lower than the specified

value,the laser diode is almost worn out, and

the laser pickup should be replaced.

If the semi-fixed resistor is adjusted while

the pickup is functioning normally,the laser

pickup may be damaged due to excessive current.

Turn off the power switch and,disconnect the

power cord from the ac outlet.

Replace the pickup with a normal one.(Refer

to "Pickup Removal" on the previous page)

Plug the power cord in,and turn the power on.

At this time,check that the laser emits for

about 3seconds and the objective lens moves

up and down.

Note: Do not observe the laser beam directly.

Play a disc.

Check the eye-pattern at TP1.

Finish.

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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1-15

KD-S723R/KD-S721R

2

1

11

12

10

15 13

14

5

4

6

3

8

9

7

Surge Protector

BIAS TSD

UNIT R:

C:F

note1) TAB (header of IC)

connected to GND

HA13164A(IC901):Regulator

1.Terminal layout

2.Block diagram

3.Pin function

Pin No. Symbol Function

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

REMOTE

ANT

ACC.IN

VDD5V

SW5V

ACC5V

ANT.CTRL

MEMORY.IN

MEM.DET

9V

CTRL

CD8V

AJ

ILL10V

GND

Output voltage is VCC-1 V when M or H level applied to CTRL pin.

Output voltage is VCC-1 V when M or H level to CTRL pin and H level

to ANT-CTRL.

Connected to ACC.

Regular 5.7V.

Output voltage is 5V when M or H level applied to CTRL pin.

Output for ACC detector.

L:ANT output OFF , H:ANT output ON

Connected to VCC.

Low battery detect.

Output voltage is 9V when M or H level applied to CTRL pin.

L:BIAS OFF, M:BIAS ON, H:CD ON

Output voltage is 8V when H level applied to CTRL pin.

Adjustment pin for ILM output voltage.

Output voltage is 10V when M or H level applied to CTRL pin.

Connected to GND.

123456789101112131415

Description of major ICs

TAB

REMOTE

ANT

ACC.IN

VDD5V

SW5V

ACC5V

ANT.CTRL

MEMORY.IN

MEM.DET

9V

CTRL

CD8V

AJ

ILL10V

GND

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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1-16

KD-S723R/KD-S721R

UPD178078GF-561 (IC701) : System CPU

1.Pin layout

80 ~ 51

1 ~ 30

50

~

31

81

~

100

NO.

1

2

3

4

5

6,7

8

9

10

11

12

13

14

15

16

17

18

19

20

21,22

23

24

25

26

27

28

29

30,31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

-

I

O

-

I

O

-

O

-

O

I

-

I

-

I

-

I

-

I

-

I

-

NC

BUSINT

BUSSI

BUSSO

JBUS-SCK

NC

I2CDAI

I2CDAO

I2CCLK

NC

LCDDA

LCDSCK

BUSI/O

NC

LCDCE

SW2

SW3

SW4

RSTSW

NC

KEY0

KEY1

KEY2

LEVEL

AVDD

SM

SQ

NC

AVSS

REGCPU

VDD

REGOSC

X2

X1

GND0

SD/ST

GND2

NC

IFC

VDDPLL

OSC

NC

I/OSymbol FUNCTION

No connection

JVC bus communication line

No connection

Serial data input

Serial data output

Serial clock output

No connection

LCD driver serial data output

LCD driver serial clock output

JVC bus output select

No connection

LCD driver communication line

CD mech switch

Traverse mech rest switch

No connection

Key input

Audio level input

Power supply

Signal level meter input

Signal quality input

Non connection

Connect to GND

Connect to GND with capacitor

Power supply

Connect to GND with capacitor

System clock

Connect to GND

Station detector & Stereo indicator

Connect to GND

No connection

IF count input

---

FM,AM osc input

No connection

2.Pin function (1/2)

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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1-17

KD-S723R/KD-S721R

NO.

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61~68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89~98

99

100

-

O

-

I

-

O

-

O

I/O

O

I

-

O

I

-

GNDPLL

AMEQ

FMEQ

IC(VPP)

RESET

SW1

REMOCON

NC

TEL_MUTE

POWER

CDON

MUTE

STAGE 1

BUZZER

STAGE 2

NC

LM0

LM1

BUCK

CCE

BUS0

BUS1

BUS2

BUS3

RST

PS1

PS2

DETACH

RDSSCK

GND1

MONO

SEEK/STOP

FM/AM

AFCK

RDSDATA

PLLMONITOR

NC

VDDPORT

GNDPORT

I/OSymbol FUNCTION

---

PLL error output for AM

PLL error output for FM

Setting to write for flash

System reset

CD mech switch

Remocon input

Non connection

TEL mute output

Power control

CD power control

Mute control

---

Non connection

---

Non connection

CD mech driver control

CD LSI communication line

ACC detection input

Memory detection

Detach detection

Clock input for RDS

Connect to GND

Mono by force

Switching SEEK & STOP

Band switch

AFcheck output

RDS data input

Non connection

Vdd

Connect to GND

2.Pin function (2/2)

UPD178078GF-561

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

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1-18

KD-S723R/KD-S721R

11

6 20

1

4

10

15

25

13

14

16

12

9

8

5

7

2

22

17

19

18

21

23

24

3

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

+

Muting &

ON Time Control

Circuit

Protective

circuit

Protective

circuit

Mute

circuit

Ripple

Filter

Stand by

Switch

N.C

+

0.22 F

2200 F 0.022 F

0.22 F

+5V

ST ON

+

47 F

0.22 F

22 F

+

Mute

+

3.3 F

Low Level

Mute ON

LA4743K(IC302):Power AMP

1.Block diagram

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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1-19

KD-S723R/KD-S721R

2.Terminal layout

3.Pin function LA4743K

TAB

GND1

OUTRR-

STBY

OUTRR+

VCC1/2

OUTFR-

GND2

OUTFR+

VREF

INRR

INFR

SGND

INFL

INRF

ONTIME

OUTFL+

GND3

OUTFL-

VCC3/4

OUTRL+

MUTE

OUTRL-

GND4

NC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

SymbolPin No. Function

Header of IC

Power GND

Outpur(-) for front Rch

Stand by input

Output (+) for front Rch

Power input

Output (-) for rear Rch

Power GND

Output (+) for rear Rch

Ripple filter

Rear Rch input

Front Rch input

Signal GND

Front Lch input

Rear Lch input

Power on time control

Output (+) for rear Lch

Power GND

Output (-) for rear Lch

Power input

Output (+) for front

Muting control input

Output (-) for front

Power GND

No connection

VREF

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

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1-20

KD-S723R/KD-S721R

VCC2

V05-

V05+

V04+

V04-

V03+

V03-

V02+

V02-

V01+

V01-

VCC1

VIN1

VIN1G

FR

REV

FWD

S-GND

VCONT

VIN4

VIN4G

VCC-S

VREF-IN

REG-OUT

REG-IN

VIN3G

VIN3

VIN2G

VIN2

FR

28

27

26

25

24

23

22

21

20

19

18

17

16

15

FR

1

2

3

4

5

6

7

8

9

10

11

12

13

14

FR

CH 3,4,5

Power supply

Output control

CH5

CH4

CH2

CH1

CH3

22K 11K

5VREG(PNPTr

The outside putting)

22K

11K

CH1,2

Power supply

LA6567H-X(IC501):CD DRIVER

1.Pin layout & blockdiagram

Level shiftLevel shiftLevel shiftLevel shift

Thermal shutdown

Input

Signal system power supply

w

.

x

i

a

o

y

u

1

6

3

.

c

o

m

Q

3

7

6

3

1

5

1

5

0

9

2

8

9

4

2

9

8

T

E

L

1

3

9

4

2

9

6

5

1

3

9

2

8

9

4

2

9

8

0

5

1

5

1

3

6

7

3

Q

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

JVC KD-S721R User manual

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