Symphonic WF15L5 Schematic

SUPPLEMENT

SERVICE MANUAL

This service manual shows only the differences between the model WF15L5 and the original model 6615LF4. All other information is described in the service manual of the model 6615LF4.

15″ COLOR LCD TELEVISION

WF15L5

TABLE OF CONTENTS

Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Schematic Diagrams / CBA's and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Different parts from the original model (6615LF4). . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

BLOCK DIAGRAMS

System Control Block Diagram

SENSOR

KEY SWITCH

CLN104

CN104

REMOTE

KEY SWITCH

RCV101

KEY-IN-122

KEY-IN-211

REMOTE66

CN113 IS USED

FOR ADJUSTMENT

AT FACTORY

TO POWER SUPPLY

BLOCK DIAGRAM

P-ON-H

P-ON-H2

FUNCTION CBA

TO LCD BACKLIGHT

BACKLIGHT-SW

BACKLIGHT-ADJ

TO IF/VIDEO

BLOCK DIAGRAM

FSC

SCL

SDA

S-SW

INPUT-0

AFT-IN

INPUT-1

P-ON-H

VOLUME

TO AUDIO

BLOCK DIAGRAM

SDA

SCL

AUDIO-MUTE

SDA2SCL1BUS-OPEN

4

CN113 (NO CONNECTION)

IC333 (TV MICRO CONTROLLER)

4KEY-IN-2

3

KEY-IN-1

MAIN CBALCD MAIN CBA UNIT

FSC123

BACKLIGHT-SW

BACKLIGHT-ADJ

P-ON-H16 8

INPUT-012 12

INPUT-111 13

P-ON-H214 10

19 5

21 3

CN102B CN102A

TO POWER

SUPPLY

BLOCK

P-25V-ON

12

P-25V-ON

DIAGRAM

221817

23

BUS-OPEN

BACKLIGHT-SW

BACKLIGHT-ADJ

16

P-ON-H

P-ON-H2

3140193241

INPUT-0

INPUT-1

P-ON+3.3V(D)

X161

27MHz

RESET

Q151

11

REMOTE

21

RESET

42

XIN

43

XOUT

S-SW717

SCL618

SDA519

AFT-IN10 14

5AFT-IN

SCL

SDA

S-SW

VOLUME15 9

AUDIO-MUTE 13 11

20

35

VOLUME

AUDIO-MUTE

Q301

Q131

80

TUNERCLK

IC171

(MEMORY)

BUFFER

3.3V<-->5V

CONVERTER

7

6

5

WP

SCL

SDA

BUS-OPEN519

CN103B CN103A

CN112(NO CONNECTION)

SDA 2

SCL 1

BUS-OPEN 4

NO PART

MOUNTED

FOR CN112

1-1

L3120BLS

IF/Video Block Diagram

TO

LCD BLOCK

DIAGRAM

CVBS11

S-VIDEO-C7

CN103B

S-VIDEO-Y9

AUDIO SIGNAL

MAIN CBA

VIDEO SIGNAL

TO AUDIO BLOCK

DIAGRAM

SIF

8

SIF

AMP

7

4.5MHz

FILTER

CF31

SIF

TRAP

BUFFER

4

5

WF9

WF8

Q702

13

BUFFER

14

12

Q701

1

BUFFER

15

2

SW

TO AUDIO

BLOCK DIAGRAM

INPUT-0(INV)

INPUT-1(INV)

11

10

CONTROL

9

Q707

Q708

INPUT-0

INPUT-1

CN103A

WF7

TO SYSTEM CONTROL

BLOCK DIAGRAM

AFT-IN

13

18

EQ

AMP

1

Q703

IC781 (INPUT SELECT)

3

BUFFER

Q32

4

VIDEO

VIF

IC31 (IF SIGNAL PROCESS)

16

SAW

FILTER

SF11

IF

TU1

(TUNER UNIT)

DET

AMP

17

VCO

IF AGC DET

RF

AGC

14

5

173

AGC

XTAL-IN

2

SCL

AFT

2

DEFEAT

AMP

11

SDA

TO

FSC

SCL

SYSTEM

CONTROL

BLOCK

S-SW

DIAGRAM

JK703

VIDEO1

CY

-IN

JK701

S-VIDEO

IN

TO SYSTEM CONTROL

BLOCK DIAGRAM

1- 2 L3120BLIF

Audio Block Diagram

AUDIO SIGNAL

30

L-CH

OFFSET

CANCEL

75uS

DE-EMPH

MATRIX AGC

29

R-CH

OFFSET

CANCEL

WIDE BAND

EXPAND

WIDE BAND

RMS DET

WIDE BAND

FILTER

(L-R)/SAP

SW

SPECTRAL

EXPAND

dBX

DE-EMPH

SPECTRAL

RMS DET

SPECTRAL

FILTER

SP802

SPEAKER

L-CH

CLN802

SP-L 1

CN802

SP801

SPEAKER

R-CH

JK801

HEADPHONE

JACK

GND 2

WF6

VOLUME

/STANDBY

CONTROL

14

RF

AMP

11

AMP

MUTE

CLN801

GND 2

SP-R 1

CN801

TO IF/VIDEO

SCL

BLOCK DIAGRAM

SDA

INPUT-0(INV)

INPUT-1(INV)

TO SYSTEM

CONTROL BLOCK

VOLUME

P-ON-H

AUDIO-MUTE

Q803

5

7

2

Q802

+5V

IC851 (MTS/SAP AUDIO SIGNAL PROCESS)

L+R

FILTER

OFFSET

STEREO

FILTER

SIF/BB

SW

INPUT

VCA

SIF

DEMOD

21

SIF

L-R

FILTER

CANCEL

SAP OUT

FILTER

SAP

DEMOD

SAP

FILTER

I2C

DECORDER

27

24

IC801 (AUDIO AMP)

13

TUNER

AUDIO1

IC852 (INPUT SELECT)

111512

14

(L-CH)

6

(L-CH)

(R-CH)

TUNER

4

(R-CH)

1

3

AUDIO1

2

9 10

SW CTL

1

5

MAIN CBA

TO

IF/VIDEO BLOCK

DIAGRAM

1-3

AUDIO1(L)

JK704

-IN

JK705

AUDIO1(R)

-IN

L3120BLA

LCD Block Diagram

LCD MODULE

OR(0)34

OR(2)32

OR(3)31

OR(1)33

OR(4)30

OR(5)29

OG(0)27

OG(1)26

OG(2)25

OG(3)24

OG(4)23

OG(5)22

OB(0)20

OB(1)19

OB(2)18

OB(3)17

OB(4)16

OB(5)15

ER(0)6

ER(1)5

ER(2)4

ER(3)3

ER(4)2

ER(5)1

EG(0)50

EG(1)49

EG(2)48

EG(3)47

EG(4)46

EG(5)45

EB(0)43

EB(1)42

EB(2)41

EB(3)40

EB(4)39

EB(5)38

OFFEV12

STV113

CLKV14

HMS1-E7

HMS1-013

STH142

POL43

LP44

CLKH10

VIDEO SIGNAL

LCD MAIN CBA UNIT

CN311

170

169

166

R(ODD)

R

165

164

163

162

161

157

156

G(ODD)

G

155

154

153

152

148

B(ODD)

B

147

146

145

LCD RGB

138

137

SIGNAL

PROCESS

136

135

130

129

R(EVEN)

CN312

128

127

126

125

G(EVEN)

118

117

116

115

114

113

B(EVEN)

108

107

101

105

STV1

OFFEV

R365

106

CLKV

CN311

WF1

WF2

R392

144

143

CLKH1

ODDINV

R202

R394

139

172

173

POL

STH-1

EVENINV

WF4

R201

WF3

WF5

174 LP

IC333 (LCD DRIVE / SIGNAL PROCESS)

A/D

R

CVBS

68

CN103B

CVBS 13

TO

IF/VIDEO

S-VIDEO-Y 15

S-VIDEO-C 17

BLOCK

DIAGRAM

CN103A

A/D

G

VIDEO

SIGNAL

C

49

PROCESS

A/D

B

Y

71

1-4

L3120BLLCD

SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS

Standard Notes

Many electrical and mechanical parts in this chassis have special characteristics. These characteristics often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts that have these special safety characteristics are identified in this manual and its supplements; electrical components having such features are identified by the mark “#” in the schematic diagram and the parts list. Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement parts that do not have the same safety characteristics as specified in the parts list may create shock, fire, or other hazards.

Notes:

1. Do not use the part number shown on these drawings for ordering. The correct part number is shown in the parts list, and may be slightly different or amended since these drawings were prepared.

2. All resistance values are indicated in ohms (K = 10

3. Resistor wattages are 1/4W or 1/6W unless otherwise specified.

4. All capacitance values are indicated in µF (P = 10

5. All voltages are DC voltages unless otherwise specified.

Note of Capacitors:

ML --- Mylar Cap. PP --- Metallized Film Cap. SC --- Semiconductor Cap. L --- Low Leakage type

Temperature Characteristics of Capacitors are noted with the following:

B --- ±10% CH --- 0±60 ppm/°C CSL --- +350~-1000 ppm/°C

3

, M = 106).

-6

µF).

Tolerance of Capacitors are noted with the following:

Z --- +80~-20%

Note of Resistors:

CEM --- Cement Res. MTL --- Metal Res. F --- Fuse Res.

Capacitors and transistors are represented by the following symbols.

CBA Symbols

(Top View) (Bottom View)

+

Electrolytic Capacitor

(Bottom View)

Transistor or Digital Transistor

E C B

(Top View)

NPN Transistor

E C B

(Top View)

PNP Transistor

E C B

(Top View)

Schematic Diagram Symbols

Digital Transistor

E C B

NPN Digital Transistor

PNP Digital Transistor

E C B

2-1 LC2N_SC