Sony MCEK-750 Service manual

MCE-K550/K750

SERVICE MANUAL

PHOTO: MCE-K750

SPECIFICATIONS

E Model

Chinese Model

Model Name Using Similar Mechanism MCE-S70
CD Mechanism Type CDM14-5BD24
Base Unit Type BU-5BD24
Optical Pick-up Type KSS-213B/S-N

VIDEO CD player

Laser Semiconductor laser
Wavelength 780-790nm

Signal format system NTSC, PAL

Frequency response 2Hz to 20kHz±1dB
Signal-to-noise ratio More than 94dB

Outputs

AUDIO OUT

VIDEO OUT

S VIDEO OUT

(K750)

PHONES

Inputs

MIC 1,
MIC 2

Jack
type

Phono
jack

Phono
jack

4-pin mini
DIN

Phono
jack

Jack
type

Phone
jacks

Maximum
output
level

2V
(at 50 kilohms)

1Vp-p

Y:1Vp-p

C:0.286Vp-p
10mW

Maximum
input
level

100mVp-p

Load impedance

Over 10 kilohms

75 ohms, unbalanced,
sync negative, white
peak

75 ohms, unbalanced,
sync negative

32ohms

Load impedance

600ohms

General

Power requirements (model for Chinese)

220-240V AC, 50/60Hz
(model for other countries)
110-120V or 220-240V A C,
adjustable, 50/60Hz

Power consumption K550:21W, K750:24W
Dimensions (approx.) 430×108×350mm

(w/h/d) inchl. projecting parts
Mass (approx.) 4.4kg

Supplied accessories

Audio and video connecting cord (1)
Remote commander (remote) RMT-K750V/K550V (1)
Sony SUM-3 (NS) battery (2)
Plug adaptor (1) (except model for China)

Desing and specifications are subject to change without notice.

VIDEO CD PLAYER

MICROFILM

The laser component in this product is
capable of emitting radiation exceeding
the limit for Class 1.

This appliance is classified as
a CLASS 1 LASER product.
The CLASS 1 LASER
PRODUCT MARKING is
located on the rear exterior.

This caution label is located inside
the unit.

CAUTION

Use of controls or adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be
damaged by heat.

TABLE OF CONTENTS

1. SERVICING NOTE ················································ 3

2. TEST MODE ·································································· 4

3. GENERAL ······································································ 6

4. DISASSEMBLY

4-1. CABINET··········································································· 7
4-2. BASE UNIT (BU-5BD24) ················································· 7

5. ELECTRICAL ADJUSTMENTS ····························· 8

6. DIAGRAMS

6-1. CIRCUIT BOARDS LOCATION ····································10
6-2. BLOCK DIAGRAM — BD SECTION — ······················ 11
6-3. BLOCK DIAGRAM — MAIN SECTION —·················13
6-4. SCHEMATIC DIAGRAM — BD SECTION —············· 16
6-5. PRINTED WIRING BOARD — BD SECTION —········ 19
6-6. PRINTED WIRING BOARD

— VIDEO SECTION —················································· 21

6-7. SCHEMATIC DIAGRAM

— VIDEO SECTION —·················································· 23

6-8. SCHEMATIC DIAGRAM

— DIAPLAY SECTION — ············································· 27

6-9. PRINTED WIRING BOARD

— DISPLAY SECTION— ··············································· 31
6-10. PRINTED WIRING BOARD — MAIN SECTION—··· 33
6-11. SCHEMATIC DIAGRAM — MAIN SECTION— ········· 35
6-12. IC BLOCK DIAGRAMS ················································· 38
6-13. IC PIN FUNCTION ························································· 41

7. EXPLODED VIEWS

7-1. CASE SECTION ······························································ 45
7-2. CHASSIS SECTION························································ 46
7-3. MECHANISM DECK SECTION (CDM14M-5BD24)··· 47
7-4. BASE UNIT SECTION (BU-5BD24) ····························· 48

8. ELECRICAL PARTS LIST ······································ 49

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH
MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.

— 2 —

SECTION 1

SERVICING NOTE

SELF-DIAGNOSIS

This model has the self-diagnosis function for the video and audio
decoder sections.
Immediately after the power on, the self-diagnosis function searches
each operation of IC’s around the mechanism control microcomputer
(IC504).
The LED (D502) on the VIDEO board indicates their results.

LED (D101) INDICATION

Light

1 Time blinking (Repeatedly)

2 Time blinking (Repeatedly)

[VIDEO BOARD] — SIDE A —

D502

SL503

SL502

SYMPTOM

No error
Video decoder error
(IC503)
Video RAM error (IC502)

HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH
TURNS OFF

Insert a screwdriver into the aperture of the unit bottom, and turn in
the direction of arrow (to OUT direction).

*

T o close the disc tab le, turn the screwdriver in the re verse direction
(to IN direction).

Screwdriver

OUT

IN

Pull out disc table.

IC502

SL501

IC503

IC504

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick­up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output three times.

— 3 —

SECTION 2

TEST MODE

VIDEO CD COLOR-BARS MODE

On this mode, the data of the color-bars signal as a picture signal
and the 1kHz sine wave signal as a sound signal are output by the
mechanism control microcomputer (IC504) for video CD signal
check. When measurement of the voltage and waveform on the
MAIN board, perform it in this mode.
For reference, the color-bars signal can be observed at J103 (VIDEO
OUT) and the sound signal can be observed at J104 (AUDIO OUT)
using an oscilloscope.

1. Connect the SL503 (C BAR (MICON)) on the VIDEO board
with solder.

2. Turn the power on.

3. After measuring, remove the soldering installed.

SERVO CHECK MODE

1. Connect the SL502 on the VIDEO board with solder.

2. Turn the power on.

TRACK

MIN SEC INDEX

TRACK

MIN SEC INDEX

Initial display (K550)

Initial display (K750)

1) Coefficient display and gain display
The following hexadecimal data is displayed on the FL tube
when the JOG SELECTOR key is pressed. Every pressing of
the JOG SELECTOR key toggles between the following
displays.

Display
position→

Display
mode 1

Display
mode 2

Display
mode 3

Display
mode 4

Display
mode 5

Display
mode 6

Display
mode 7

TRACK

01

02

03

04

05

06

07

INDEX

FB POINT
(when jitter
is minimum)

00

TRVSC
RESISTER

VC
OFFSET

FCS AUTO
GAIN

RF PEAK –
RF
BOTTOM

Set the
present FB
REGISTER
value

MIN

AUT O F B
POINT

FB upper
limit

00

FE
OFFSET

00

RF PEAK

00

RF JITTER
MINIMUM
VALUE

FB lower
limit

TE
RESISTER

RF
OFFSET

TRK AUTO
GAIN

RF
BOTTOM

Present RF
JITTER
value

SEC

— 4 —

2) Pressing of the DNR/COMET key toggles between ON and
OFF of the tracking and sled servo.

3) Pressing the PLAY MODE key (KARAOKE PON in K750)
during playback increases the FB value (every 4 steps).
Pressing the REPEAT key (SURROUND in K750) decreases
the FB value (every 4 steps).

4) Pressing the ACTIVE key toggles between the normal speed
and double speed.

5) Pressing the RETURN key toggles between the up FIL and
NO FIL.

6) Pressing A⇔B key performs re-measurement of focus bias.

Lighting of All Fluorescent Indicator Tube
Displays and Key Check Mode

1. Connect SL501 on the VIDEO board with solder.

2. Turn the power on.

3. All the Fluorescent Indicator tube displays light up.

4. Press any button to enter the key check mode. In the key check
mode, each time a button is pressed, figures displayed on the
Fluorescent Indicator tube displays increase. Howev er, f igures
will not increase for buttons which have been pressed once.
The button number corresponding to the button pressed will
also be displayed. Button numbers are displayed only while
the corresponding buttons are pressed.

5. After the test mode, remove the soldering installed.

7-segment display

8888

n

Count up display

Initial display (K550)

n

Button number display

Button Name
NEXTˆ

§OPEN/CLOSE
RETURN
PREV

º
‚

DNR
MPX (K750)

L/R/STEREO (K550)
SURROUND (K750)

REPEAT (K550)
KEY CONTROL N

(K750)
KARAOKE STAR

(K750)
KEY CONTROL #

(K750)
KEY CONTROL ˜

(K750)
KARAOKE PON

(K750)
PLAY MODE (K550)

JOG SELECTOR
(PUSH SELECT)

ACTIVE/COMET

p

∏

Button Number (Displayed only
while a button is pressed.)

Figure 0E
Figure 16
Figure 30
Figure 31
Figure 33
Figure 34
Figure 48

Figure 50

Figure 5d

Figure 67

Figure 68

Figure 6b

Figure 6c

Figure 77

Figure 81
Figure 88

All Fluorescent Indicator tube
displays light up

Music calendar light up alternately
(K550)
(odd numbor to even number)
KEY indicater light up alternately
(K750)

↔

24

68

12 14

16 18

10

20

13

79

11 13

17 19

5

15

Initial display (K750)

[ VIDEO BOARD ] — SIDE A —

D502

IC502

SL503

SL501

IC503

SL502

IC504

— 5 —

·

7-segments displays light up
alternately
The odd number digits and the even
number digit of the upper 7-segments
displays and the lower 7-segments
displays light up alternately.

Location of Parts and Controls

Front Panel

SECTION 3

GENERAL

!ª

!•

1

2

!¶

!§

3

!¢!∞

1 STANDBY botton
2 KEY CONTROL botton (K750 MODEL)
3 KARAOKE STAR botton (K750 MODEL)
4 OPEN/CLOSE botton
5 RETURN/PREV/NEXT botton
6 DNR/COMET botton
7 ACTIUVE botton
8 ) botton
9 0 botton
!º JOG SELECTOR

Video CD

4567

8
9

!¡!™!£

!º

!¡ p botton
!™ P botton
!£ · botton
!¢ MPX/KARAOKE PON/SURROUND botton (K750

MODEL)
L/R/STEREO/PLAY MODE/REPEAT botton
(K550 MODEL)

!∞ ECHO LEVEL/MIC 1 LEVEL/MIC 2 LEVEL/

VOCAL LEVEL/MUSIC LEVEL

!§ MIC1/MIC2 jack
!¶ MIC CONTROL jack (K750 MODEL)
!• PHONES jack-LEVEL
!ª MODE switch (K750 MODEL)

Rear Panel

@º @¡ @™ @£ @¢ @∞

K750
MODEL

@º MUSIC LEVEL switch (K550 MODEL)
@¡ AUDIO OUT jack
@™ VIDEO OUT jack
@£ S VIDEO OUT jack (K750 MODEL)
@¢ COLOR SYSTEM switch
@∞ VOLTAGE SELECTOR switch (Singapore, Malaysia, Taiwan MODEL)

— 6 —

SECTION 4

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

4-1. CABINET

• In order to remove the front panel block when the power supply

does not turn on, rotate the cam with screwdriver as the figure
shows, and the disk table will be moved.
Then pull out the disk table by your hand to remove the loading
panel. After that take out the front panel block.

Screwdriver

4-2. BASE UNIT (BU-5BD24)

1

Turn the cam to the
direction of arrow
(counter clock wise)
by screwdriver

Pull out disk table

BU-5BD24

3

Yoke bracket

4

Remove the MD (BU-5BD24)
to the direction of arrow.

2

Take off the disk table.

— 7 —

SECTION 5

ELECTRICAL ADJUSTMENTS

CD SECTION

Note :

1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.

S Curve Check

oscilloscope

BD board

TP (FE)
TP (VC)

Procedure :

1. Connect oscilloscope to test point TP (FE) on BD board.

2. Connect between test point TP (FEI) and TP (VC) by lead wire.

3. Turned Power switch on.

4. Put disc (YEDS-18) in and turned Power switch on again and
actuate the focus search. (actuate the focus search when disc
table is moving in and out.)

5. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B.
And confirm peak to peak level within 3±1 Vp-p.

S-curve waveform

symmetry

A

within 3 ± 1 Vp-p

B

Note : A clear RF signal waveform means that the shape “◊” can

be clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV
TIME/DIV : 500ns

level : 1.3 p-p

+0.25
–0.20

E-F Balance (Traverse) Check

oscilloscope

BD board

TP (TE)
TP (VC)

Procedure :

1. Connect oscilloscpe to test point TP (TE) on BD board.

2. Turned Pow er switch on.

3. Connect the SL502 on the VIDEO board with solder.

4. Put disc (YEDS-18) in to play the number two track.

5. Press the DNR button. (The tracking servo and the sledding
servo are turned OFF.)

6. Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%

Traverse wavefor m

Center of the waveform

B

6. After check, remove the lead wire connected in step 2.
Note : • Try to measure several times to make sure than the ratio

of A : B or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the
brightness to obtain best waveform.

RF Level Check

oscilloscope

BD board

TP (RF)
TP (VC)

Procedure :

1. Connect oscilloscope to test point TP (RF) on BD board.

2. Turned Power switch on.

3. Put disc (YEDS-18) in to play the number five track.

4. Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.

±

0.6 Vp-p

A (DC voltage)

0V

level : 1.3

7. Press the DNR button. (The tracking servo and sledding servo
are turned ON.) Confirm the C (DC voltage) is almost equal to
the A (DC voltage) is step 6.

Traverse wavefor m

0V

T rac king servo
Sled servo

OFF

T racking servo
Sled servo

ON

C (DC
voltage)

8. Remove the soldering installed in step 3.

— 8 —

SECTION 6

DIAGRAMS

Adjustment Location :

[ BD BOARD ] — SIDE A —

1

10

20

IC103

11

IC101

(RF) (VC)

(FE)

(FEI)

VIDEO SECTION
Frequency adjustment (NTSC)

1. Connect the frequenc y counter to c hec k point of the VIDEO
board.

VIDEO board

27.0 MHz
GND

frequency counter

2. Color system switch (S300) select to NTSC and turn the
POWER switch ON.

3. Adjust CT503 of the VIDEO boar d so that the frequenc y
counter read 27.0MHz ± 80Hz at ST OP condition.

Frequency adjustment (PAL)

1. Connect the frequenc y counter to c hec k point of the VIDEO
board.

VIDEO board

27.0 MHz
GND

frequency counter

6-1. CIRCUIT BOARDS LOCATION

BD board

CN board

MAIN board

VOL board

MIC board

LOADING board

VIDEO board

DISPLAY board

[ VIDEO BOARD ] — SIDE A —

SL503
SL502
SL501

IC504

CT503

GND

2. Color system s witch (S300) select to P AL and turn the PO WER
switch ON.

3. Adjust CT503 of the VIDEO boar d so that the frequenc y
counter read 27.0MHz ± 80Hz at ST OP condition.

CN504

X505

IC513IC512

27MHz

— 9 — — 10 —

MCE-K550/K750

6-2. BLOCK DIAGRAM — BD SECTION —

— 11 — — 12 —

6-3. BLOCK DIAGRAM — MAIN SECTION —

MCE-K550/K750

BD

BOARD

8

4

MPEG DECODER

7

HD0

13

HD7

.

16

119

.

A0

120

.

5

A3

.

6

XHIRQ

117

XWR

116

XHCS

114

118

XRST
XSGRST

97

XTL0I

3

XTL0O

2

XTL2I

107

XTL2O

106

OSD R

59

OSD G

58

OSD B

57

XOSDEN

56
92

H SYNC
CBLNK/FSC

95

V SYNC

93

DATI

111

BCKI

112

LRCI

110

C2PO

109

IC503

63

R/Cr0
R/Cr7

70

71

73

G/Y0

.

76

G/Y7

80

18

.

24

.

20

MA0

.

21

.

23

.

19

MA8

.

22

.

17

33

54

39

.

.

52

41

.

.

50

43

.

.

MD0

48

47

.

.

49

46

MD15

.

.

51

42

.

.

53

40

.

.

55

38

XMWE

35

XRAS

34

XCAS0

37

FID/FHREF

94

DCLK

89

DATA

100

FSXI

103

QCK

5

3

DIVIDER

IC513(2/2)

DQ

62

Y/C PROCESSOR

IC506

27

8

8

DRAM
IC502

16

19

A0

.

9

22

A8

26

2

31

5

34

DQ1

.

.

16

36

7

DQ16

39

10

W

13

RAS

14
28

UCAS
LCAS

29

+5V(D)

384FS

QCK

9

11

DIVIDER

IC513(1/2)

DQ

812

20

18

11

100

13
12

IC505(4/4)

12 3

27MHz

C/RI0

CRI7

Y/GI0

Y/GI7

DCLK

31

11

CLOCK CONT

X202

SDI

SO1

30

IC202

C/RO0

CRO7

Y/GO0
Y/GO7

H SYNC
V SYNC

XSCK

XRST

93 29

CLK1

XRST

51

58

60

67

98
97

XCS

DNR CS

4

8

8

10BIT D/A CONV

18

C0

C7

11

9

Y0

6

.

4

Y7

1

H SYNC

60

V SYNC

59

FID

62

SYS CLK

56

PD CLK

57

48

SI

SO1

49

IC511

SCK

CLK1

55

XRST

C OUT

Y OUT

COMP O

XVRST

51

50

XRST

X504

33MHz

XCS

DVE CS

32

29

24

DIGITAL FILTER

DI

6

3

MLEN

5

BCLK

8

LRCK

XTI

18

XTO

19

23

MUTE SW

DIGITAL FILTER

D/A CONV

SI

92

93

BCK

94

LRCK

14

BFOI

XRST

8

XRST

D/A CONV

IC508

MD

MC

24

SO1

CLK1

Q310

IC510

SCK

RVDT

98

4

SO1

CLK1

L ON

R ON

XRST

22

XRST

AO1N
AO1P
AO2N
AO2P

AIN3

LO3

XLT

1

99

KDSP CS

12

LO

10

14

RO

16

ML

1

DF CS

39
40

33
34
20
21

READY

KDSP RDY

LPF

IC101(1/2)

5
6

3
2

7

1

+10V

+UNREG

-UNREG

-10V

+5V

(UNSW)

+5V(A)
+5V(D)

LPF

IC102(1/2)

5

3

+7V

–5V

7

1

C BUFFER

Y BUFFER

CV BUFFER

LINE AMP

IC103(1/2)

IC103(2/2)

Q331-333

Q341-343

Q371-374

MIX AMP

IC401(2/2)

K550 MODEL

K750 MODEL

REG

3

IC304

RIPPLE FILTER

Q311

RIPPLE FILTER

Q312

UNSWITCHED +5V

IC302

5

OUT

4

RESET

+5V REG

IC301

3

Q309

–5V REG

IC305

3

MUTE
Q100

MUTE

Q200

MIC1 VOL

IC401(2/2)

MIC2 VOL

ECHO UNIT

911

1

2

1

IN

+Vcc+V OUT

1

IN–V OUT

2

RV400

RV401

IC402

OUT

IN

Q305

POWER

SW

POWER

SW

Q313
Q314

HP AMP

IC105(1/2)

IC105(2/2)

MIC AMP

IC400(1/2)

7

MIC AMP
IC400(2/2)

D905

D904

RECT

D906

-30V

(VFDP)

5

MUTE
Q101

MUTE
Q201

VF1

VF2

K750 MODEL

J102

C

S VIDEO

J103

J104

-1

-2

K750 MODEL

ICP900

ICP901

REG CONT

Q900,901

VIDEO

VIDEO OUT

LL

R

L

L

R

L

L

MIC 1

IN

MIC 2

IN

MIC

CONTROL

OUT

OUT

K550 MODEL

AUDIO

OUT

K750 MODEL

AUDIO OUT 1

AUDIO OUT 2

D901

T901

Signal path

J300

PHONES

F901

CHINESE,

: CD

: CHROMA

: Y

: VIDEO

MODEL

S901

POWER

S900

115V

230V

SINGAPORE,

MALAYSIA,TAIWAN

MODEL

AC

IN

Y

CV

L

R

L

R

L

R

RV300

7

13

5

31

D903

24

2

36

1
4

6
37
10

3

5
18
11
19

7

28

27

29

30

52

25
26

90

95

94

IC505(2/4)

10

9

FL DRIVE

MECHA CONTROL

DSP XRST
SCLK
SUBQ
SENS
XLT
LDON
SQCK
MUTE
DATA
CLK
SCOR
CONT1
CONT2

SIRCS

LOAD IN

LOAD OUT

IN SW

OUT SW

N/P SW93

KARAOKE

JOG 1
JOG 2

KEY 0

KEY 191

KEY 292

VOCAL VOL

MUSIC VOL

8

IC701

S1-S24 C1-C6

.

56 - 42

VF1

MICON

IC504

VCDINT

XRW

VCDCS

X OUT

X IN

TEST LED

PWON LED

MODE1
MODE2

OSD CS

SO1
CLK1
XRST

DNR CS
DVE CS

DF CS

KDSP CS

KDSP RDY

ECHO VOL

MIC CONT

AMUTE

XRESET

PWON

FL CS

XBLK

1
2

+5V(D)

IC505(1/4)
IC505(3/4)

5
4

+5V(D)

XBLK

40 - 33

2 - 7

FL700

FLUORESCENT

INDICATOR TUBE

D0

88

8

81

D7

A0

72

4

69

A3

20

IC507

1

46

RD

44

47

13

X502

10MHz

15

73

LED

3

6

C1

GRID

DRIVE

Q401

DRIVE

Q700

K550 MODEL

K750 MODEL

-30V

(VFDP)

VF2

78

53
54

34
31
33
77

100

21
22

49
50

97
89

48
12
38
79
80

61

62

CE

C1

2
12

13

STANDBY

+5V(D)

2
3

1
4

SO1
CLK1
XRST

DNR CS
DVE CS
DF CS

KDSP CS
KDSP RDY

D502

D700

CS
DATA
CLK
PCL

3

11

OSD

IC509

4
5

V CBL

H SYNC

V SYNC

OSC

+5V

(EVER)

+5V

(EVER)

VR
VG
VB

6

XRST

X501

28.63MHz

X503

45MHz

16

17

18

11
20

19

8

K550 MODEL

CN101

A

XRST
SCLK

SUBQ

SENS

XLT

LDON
SQCK
MUTE

DATA

CLK

SCOR

CTRL1
CTRL2
ADATA

BCLK
LRCK

C2PO

384BD

16

K750 MODEL

(EVER)

LOADING

MOTOR

S720

KARAOKE

ENCODER

AUDIO

ADATA

BCLK
LRCK

+5V

S301

ATT

XRST

M

LOAD IN

LOAD OUT

PAL

AUTO

NTSC

ON

OFF

3

2

2

10

+7V
S152

S153

S300

+5V

(EVER)

12dB

9dB

OFF

SO1

CLK1

REMOTE

CONTROL

IC700

MOTOR DRIVE

IC501

OUT1

OUT2

78

K750

MODEL

S700-705

S707-712

S713-719

RV301 RV302

MUSIC

VOL

64

63

R IN

F IN

1

5

6

VOCAL

+5V(D)

DI

CL

Q701-706

D701-706

VOL

S35-40

22 - 17

LED

DRIVE

6

— 13 — — 14 —

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