Jvc Kd-s687 User manual

SERVICE MANUAL

CD RECEIVER

No.49737

Apr. 2002

KD-S687

Area Suffix

UR ------------------- Brazil

Contents

Safety precaution

Preventing static electricity

Disassembly method

Adjustment method

1-2

1-3

1-4

1-11

Flow of functional

operation unit TOC read

Maintenance of laser pickup

Replacement of laser pickup

Description of major ICs

1-12

1-14

1-15 26

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1-2

!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

Front bracket

CD mechanism

control board

Damper bracket

CD mechanism ass’y

FD screw

Feed motor ass’y

FD gear Pickup unit

Preventing static electricity

1.Grounding to prevent damage by 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.

2.About the earth processing for the destruction prevention by static electricity

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

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

2-1 Ground the workbench

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.

2-2 Ground yourself

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

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.

4.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

Conductive material

(conductive sheet) or iron plate

(caption)

Anti-static wrist strap

Soldering

Attention when traverse unit is decomposed

1.Solder is put up before the card wire is removed from connector on

the CD substrate as shown in Figure.

(When the wire is removed without putting up solder, the CD pick-up

assembly might destroy.)

2.Please remove solder after connecting the card wire with

when you install picking up in the substrate.

*Please refer to "Disassembly method" in the text for pick-up and how to

detach the substrate.

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1-4

Press the eject button in the lower right part of the

front panel. Remove the front panel assembly from

the body.

1.

Removing the front panel assembly

(See Fig.1)

Prior to performing the following procedure, remove

the front panel assembly.

Release the four joint tabs aon both sides of the

front chassis assembly and remove the front chassis

assembly toward the front.

1.

Removing the front chassis assembly

(See Fig.2 and 3)

Disassembly method

Fig.1

Fig.2

Fig.3

Front panel assembly

Eject button

Tab a

Front chassis assembly

Front chassis

assembly

Heat sink Tab a

Tab a

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1-5

Remove the three screws Aon the left side of the

body.

1.

Removing the heat sink (See Fig.4)

Prior to performing the following procedure, remove

the front panel assembly, the front chassis assembly

and the heat sink.

Turn over the body and unjoint the five joints bwith

the bottom cover and the body using a screwdriver.

1.

Removing the bottom cover

(See Fig.5 and 6)

Fig.4

Fig.5

Fig.6

Heat sink

AA

Joints b

Joint b

Joints b

Joint b

Bottom cover

Rear panel

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1-6

Prior to performing the following procedure, remove

the front panel assembly, the front chassis assembly,

the heat sink and the bottom cover.

Remove the screw B, the four screws C and the

three screws Dattaching the rear bracket on the

back of the body. Remove the rear panel.

Remove the two screws Eattaching the main board

on the bottom of the body. Disconnect connector

CN501 on the main board in the direction of the

arrow.

1.

2.

Removing the main board

(See Fig.7 and 8)

Prior to performing the following procedure, remove

the front panel assembly, the front chassis assembly,

the heat sink, the bottom cover and the main board.

Remove the three screws Fattaching the cassette

mechanism section on the back of the top chassis.

1.

Removing the CD mechanism section

(See Fig.9)

Fig.7

Fig.8

Fig.9

Rear panel

B

D

C

Main board

E

CN501

CD mechanism section

F

Top chassis

CC

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1-7

Prior to performing the following procedure, remove

the front panel assembly.

Remove the four screws Gattaching the rear cover

on the back of the front panel assembly.

Unjoint the ten joints cwith the front panel and the

rear cover.

Remove the control switch board on the back of the

front panel.

1.

2.

3.

Removing the control switch board

(See Fig.10 to 12)

Fig.10

Fig.11

Fig.12

G

GG

G

Rear cover

Joints c

Front panel

Rear cover

Front panel

Control switch board

Joints c

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1-8

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

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

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

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 (2 Speakers connection)

Line oout impeadance 20k

Output Level Line out 2.0V (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 ~ 107.9MHz

MW 530kHz ~ 1710 kHz

EXTGS004-26P

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1-12

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 until TOC read

•When the pickup correctly moves

to the inner area of the disc

TERMINAL

Microprocessor

commands

FMO

TC9462 "53"

FEED MOTOR

+TERMINAL

IC581 "5"

REST SW

•When the disc correctly rotates

Tracking Servo Loop ON

Servo CLV

Rough

Servo

AccelerationAcceleration

Microprocessor

commands

Spindle

motor (-)

IC581 "7"

0.5 Sec 0.5 Sec

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1-13

Feed Section

Focus Section

Tracking Section

Spindle Section

Is the voltage output at

IC521 pin "53" 5V or 0V?

Check the feed motor.

Is 4V present at both

sides of the feed motor?

Is the wiring for IC521

(90) ~ (100) correct?

Check IC581.

Is 6V or 2V present at

IC581 "5" and "6"?

Is 5V present at IC581

pin "11"?

Check the feed motor

connection wiring.

Check the vicinity of

IC521.

Check CD 9V

and 5V.

YES

NONO

NO

YES

When the lens is

moving: Check the circuits in

the vicinity of IC581

pins "15" ~ "18".

Check the pickup and

its connections.

NO

YES

Does the S-search

waveform appear at

IC581 pins "17" and "18"?

Is the disk rotated?

Does the RF signal

appear at TP1?

Is 4V present at IC581

pins "7" and "8" ?

Check the spindle motor

and its wiring.

Is 4V present at IC521

pin "55" ?

Check the vicinity of

IC581.

Check IC501 and

IC521.

YES

NO

NO NO

YES

Check the circuits in the

vicinity of IC501 "19" ~

"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 IC501 pins

"2" ~ "12".

Check IC521.

Check the pickup and

its connections.

YESYES

YES

Is the tracking error signal

output at IC501 "12"?

Approx. 1.2 V

4V

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1-14

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.

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1-15

2

1

11

12

10

15 13

14

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7

ILM AJGND

C6

10u

C5

0.1u

C4

0.1u

C3

0.1u

AUDIO OUT

CD OUT

CTRL

ANT CTRL

EXT OUT

ANT OUT

VCC ACC

Surge Protector

BIAS TSD

C1

100u C2

0.1u

+B

ACC

BATT.DET OUT

COMPOUT

VDD OUT

SW5VOUT

ILMOUT

C7

0.1u

C8

0.1u

R1

UNIT R:

C:F

note1) TAB (header of IC)

connected to GND

HA13164 (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

EXTOUT

ANTOUT

ACCIN

VDDOUT

SW5VOUT

COMPOUT

ANT CTRL

VCC

BATT DET

AUDIO OUT

CTRL

CD OUT

ILM AJ

ILM OUT

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 applies 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 applies to CTRL pin.

Connected to GND.

123456789101112131415

Description of major ICs

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

KD-S687

1-16

BD3860K (IC161):E.Volume

1.Terminal layout

2.Blockdiagram

3.Pin function

1 11

33 23

34

44

22

12

13

12

7

8

10

11

41

42

43

44

1

2

3

4

6 5 9 40 36 35 343328323130 2919 15 14

39 38 37 25 24 26 23 22 21 20 18 17 16

GND FIL VCC SEL1

0 18 dB

VIN1 LOUD1 HF1 LF1 DET1 TIN1 TNF1 BNF1

OUTF1

OUTR1

SI

SC

OUTR2

OUTF2

BOUT2BNF2TNF2TIN2BBOUT2MIX2VCA2DET2LF2HF2LOUD2VIN2SEL2

D2

C2

B2

A2

D1

C1

B1

A1

BOUT1VCA1 MIX1 BBOUT1

POWER

SUPPLY INPUT

GAIN

INPUT

GAIN

MAIN

VOLUME

0 -40 dB

LOUDNESS

MAIN

VOLUME

0 -40 dB

LOUDNESS

LOW(f=50Hz) 6dB

PROCESS CONTROL +3 to 12dB

(f=10kHz)

LOW(f=50Hz) 6dB

PROCESS CONTROL +3 to 12dB

(f=10kHz)

TREBLE

-14 +14dB

TREBLE

-14 +14dB

BASS

-14 +14dB

BASS

-14 +14dB

FADER

CH1 FRONT

0 -5 dB

FADER

CH2 FRONT

0 -5 dB

FADER

CH1 REAR

0 -5 dB

FADER

CH2 REAR

0 -5 dB

LOGIC

INPUT

SELECTOR

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

CH2 Input Pin A

CH2 Input Pin B

CH2 Input Pin C

CH2 Input Pin D

1/2 VCC Pin

Ground Pin

Serial Data Receiving Pin

Serial Clock Receiving Pin

Power Supply Pin

CH2 Rear Output Pin

CH2 Front Output Pin

CH1 Rear Output Pin

CH1 Front Output Pin

CH1 Bass Filter Setting Pin

CH2 Bass Filter Setting Pin

CH2 treble Filter Setting Pin

CH1 treble Filter Setting Pin

CH2 treble Input Pin

CH2 BBE II Signal Output Pin

CH2 Output MIX Amplifier

Inverse Input Pin

A2

B2

C2

D2

FIL

GND

SI

SC

VCC

OUTR2

OUTF2

OUTR1

OUTF1

BOUT1

BNF1

BOUT2

BNF2

TNF2

TNF1

TIN2

BBOUT2

MIX2

No. Symbol Function

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

CH2 High Pass VCA Output Pin

CH2 Low Pass Filter Setting Pin

CH2 High Pass Filter Setting Pin

CH2 High Pass Attack/Release Time Setting Pin

Non connect

CH1 High Pass Attack/Release Time Setting Pin

CH1 treble Input Pin

CH1 BBE II Signal Output Pin

CH1 Output MIX Amplifier Inverse Input Pin

CH1 High Pass VCA Output Pin

CH1 Low Pass Filter Setting Pin

CH1 High Pass Filter Setting Pin

CH1 Loudness Filter Setting Pin

CH1 Main Volume Input Pin

VCH2 Loudness Filter setting Pin

CH2 Main Volume Input Pin

CH2 Input Gain Output Pin

CH1 Input Gain output Pin

CH1 Input Pin A

CH1 Input Pin B

CH1 Input Pin C

CH1 Input Pin D

VCA2

LF2

HF2

DET2

NC

DET1

TIN1

BBOUT1

MIX1

VCA1

LF1

HF1

LOUD1

VIN1

LOUD2

VIN2

SEL2

SEL1

A1

B1

C1

D1

No. Symbol Function

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

KD-S687

1-17

28 REV

27 FWD

26 S-GND

25 VCONT

24 VIN4

23 VIN4G

22 VCC-S

FR FR

21 VREF-IN

20 REG-OUT

19 REG-IN

18 VIN3G

17 VIN3

16 VIN2G

15 VIN2

VCC2 1

V05- 2

V05+ 3

V04+ 4

V04- 5

V03+ 6

V03- 7

FR FR

V02+ 8

V02- 9

V01+ 10

V01- 11

VCC1 12

VIN1 13

VIN1G 14

POWER

CH5

CH4

CH3

CH2

CH1

22k

11k

CH1.2.3.4

POWER

Level Shift Level Shift Level Shift Level ShiftOutput Control

22k

11k

22k

3.3VREG (External

PNP Tr)

Signal System Power

22k 11k

Input

Thermal Shuydown

11k

LA6574H-X (IC561) : Power AMP

1.Pin layout / Block diagram

1

2

3

4

5

6

7

8

9

10

11

12

13

14

CH3,4,5 power supply

Loading output (

CH4 output terminal (

CH3 output terminal (

CH2 output terminal (

CH2 output terminal ( )

CH1 output terminal (

CH1 output terminal ( )

CH1,2 power supply

CH1 input terminal

CH1 input terminal (For gain ADJ)

VCC2

VO5-

VO5+

VO4+

VO4-

VO3+

VO3-

VO2+

VO2-

VO1+

VO1-

VCC1

VIN1

VIN1G

15

16

17

18

19

20

21

22

23

24

25

26

27

28

CH2 input terminal

CH2 input terminal (For gain ADJ)

CH3 input termianl

CH3 input terminal (For gain ADJ)

Regulator terminal

Reference voltage input terminal

Signal system power supply

CH4 input terminal (For gain ADJ)

CH4 input terminal

5CH output voltage setting terminal

GND for signal line

5CH output select terminal

VIN2

VIN2G

VIN3

VIN3G

REG-IN

REG-OUT

VREF-IN

VCC-S

VIN4G

VIN4

VCONT

S-GND

FWD

REV

2.Pin function

PinNo. Symbol Function PinNo. Symbol Function

)

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

KD-S687

1-18

UPD178078GF-559 (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

-

O

-

O

-

O

I

-

I

-

I

-

I

-

I

-

I

-

BUSINT

BUSSI

BUSSO

JBUS-SCK

VOL-DA

VOL-CLK

LCDDA

LCDCLK

BUSI/O

LCDCE

SW2

SW3

SW4

RSTSW

ENC1

ENC2

KEY0

KEY1

KEY2

LEVEL

AVDD

SM

AVSS

REGCPU

VDD

REGOSC

X2

X1

GND0

SD/ST

GND2

IFC

VDDPLL

OSC

I/OSymbol FUNCTION

No use

JVC bus communication line

No use

Serial data for volume

Serial clock for volume

No use

LCD driver serial data output

Serial data for LCD

JVC bus output select

No use

LCD driver communication line

CD mech switch

Traverse mech rest switch

Encoder input

Key input

Audio level input

Power supply

Signal level meter input

No use

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 use

IF count input

---

FM,AM osc input

No use

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

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

KD-S687

1-19

NO.

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61~67

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

-

O

-

GNDPLL

AMEO

FMEO

IC(VPP)

RESET

SW1

REMOCON

VTR-LOGIC

VR-CONT

POWER

CDON

MUTE

STAGE

BUZZER

JAPAN

CDRW

LM0

LM1

BUCK

CCE

BUS0

BUS1

BUS2

BUS3

RST

PS1

PS2

DETACH

GND1

MONO

SEEK/STOP

FM/AM

ANT

TEL MUTE

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

No use

Power control

CD power control

Mute control

No use

CD-RW detect signal output

CD mech driver control

CD LSI communication line

ACC detection input

Memory detection

Detach detection

No use

Connect to GND

Mono by force

Switching SEEK & STOP

Band switch

No use

Antena regulator control signal

No use

Non connection

Vdd

Connect to GND

2.Pin function (2/2) UPD178078GF-559

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

KD-S687

1-20

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

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

+

IN 1

IN 2

ST BY

Vcc 1/2 Vcc 3/4

OUT 1+

OUT 1-

PWR GND1

OUT 2+

OUT 2-

PWR GND2

R.F

IN 3

IN 4

PRE GND

ON TIME C 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

TAB

+5V

ST ON

+

47 F

0.22 F

22 F

+

Mute 10K

+

3.3 F

OUT 3+

OUT 3-

Low Level

Mute ON

PWR GND3

OUT 4+

OUT 4-

PWR GND4

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

TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

JVC KD-S687 User manual

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