Symphonic WF15L5 Manual de usuario

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

SUPPLEMENT

1-1

BLOCK DIAGRAMS

System Control Block Diagram

L3120BLS

FUNCTION CBA

KEY-IN-122

CLN104

KEY SWITCH

KEY-IN-211

BACKLIGHT-SW

BACKLIGHT-ADJ TO LCD BACKLIGHT

BLOCK DIAGRAM

KEY SWITCH

IC333 (TV MICRO CONTROLLER)

21 CN104

KEY-IN-1

REMOTE

RESET RESET

Q151

P-ON+3.3V(D)

43 X161

27MHz

XIN

XOUT

MAIN CBALCD MAIN CBA UNIT

4KEY-IN-2

BACKLIGHT-SW

19 5

BACKLIGHT-ADJ

21 3

P-ON-H16 8

VOLUME15 9

AUDIO-MUTE

13 11

INPUT-012 12

INPUT-111 13

S-SW717

SCL618

SDA519

P-ON-H

VOLUME

AUDIO-MUTE

SDA

SCL

INPUT-0

INPUT-1

S-SW

SCL

SDA

TO POWER SUPPLY

BLOCK DIAGRAM

TO IF/VIDEO

BLOCK DIAGRAM

TO AUDIO

BLOCK DIAGRAM

BACKLIGHT-SW

BACKLIGHT-ADJ

P-ON-H

VOLUME

AUDIO-MUTE

INPUT-0

INPUT-1

S-SW

SCL

SDA

CN102B CN102A

SDA 2

SCL 1

CN112(NO CONNECTION)

IC171

(MEMORY)

SCL 6

SDA 5

Q131

3.3V<-->5V

CONVERTER

BUS-OPEN 4

NO PART

MOUNTED

FOR CN112

BUS-OPEN

P-ON-H214 1016

P-ON-H2

P-25V-ON P-25V-ON

TO POWER

SUPPLY

BLOCK

DIAGRAM

AFT-IN10 145AFT-IN

TUNERCLK

Q301

BUFFER

AFT-IN

FSC

FSC123

BUS-OPEN519

CN103B CN103A

CN113 (NO CONNECTION)

SDA

2SCL

BUS-OPEN

4CN113 IS USED

FOR ADJUSTMENT

AT FACTORY

P-ON-H2

REMOTE

SENSOR

RCV101

REMOTE66

P-ON-H

1-2 L3120BLIF

IF/Video Block Diagram

TO AUDIO

BLOCK DIAGRAM

CN103A TO

LCD BLOCK

DIAGRAM

CN103B

CVBS11 S-VIDEO-C7 S-VIDEO-Y9

INPUT-0(INV)

INPUT-1(INV)

SAW

FILTER

TU1 SF11

AGC

SDA

SCL

SIF

MAIN CBA

VIDEO SIGNAL AUDIO SIGNAL

TO AUDIO BLOCK

DIAGRAM

JK703

VIDEO1

-IN

JK701

S-VIDEO

BUFFER

Q32

SDA

SYSTEM

CONTROL

BLOCK

DIAGRAM

SCL

S-SW

IC781 (INPUT SELECT)

Q703

Q702

Q701

CONTROL

911

INPUT-0

INPUT-1

TO SYSTEM CONTROL

BLOCK DIAGRAM

Q707

Q708

(TUNER UNIT)

BUFFER

WF7

WF8

WF9

CF31

IC31 (IF SIGNAL PROCESS)

VIF

AMP VIDEO

DET

VCO

4.5MHz

FILTER

AGC

AMP

SIF

AMP

17 478

XTAL-IN 14

TO SYSTEM CONTROL

BLOCK DIAGRAM

AFT-IN

SIF

TRAP

FSC

IF AGC DET

AFT EQ

AMP

DEFEAT

1-3

Audio Block Diagram

L3120BLA

MAIN CBA

AUDIO SIGNAL

AUDIO-MUTE

VOLUME TO SYSTEM

CONTROL BLOCK

INPUT-0(INV)

INPUT-1(INV)

SCL

SDA

IC852 (INPUT SELECT)

SW CTL

9 10

STEREO

FILTER 75uS

DE-EMPH

dBX

DE-EMPH

L+R

FILTER

WIDE BAND

FILTER WIDE BAND

RMS DET WIDE BAND

EXPAND

SPECTRAL

EXPAND

SPECTRAL

RMS DET

SPECTRAL

FILTER

OFFSET

CANCEL

L-CH

R-CH

MATRIX AGC

OFFSET

CANCEL L-R

FILTER (L-R)/SAP

SAP

FILTER

I2C

DECORDER

SAP

DEMOD SAP OUT

FILTER

IF/VIDEO BLOCK

DIAGRAM

TUNER

(L-CH)

(R-CH)

IC851 (MTS/SAP AUDIO SIGNAL PROCESS)

AUDIO1(L)

-IN

JK704

SIF

JK705

AUDIO1(R)

-IN

OFFSET

CANCEL

IC801(AUDIO AMP)

VOLUME

AMP

MUTE

/STANDBY

CONTROL

(R-CH)

(L-CH)

Q802

Q803

JK801

HEADPHONE

JACK

SP801

SPEAKER

R-CH

CN801

SP-R 1

GND 2

SP802

SPEAKER

L-CH

CN802 CLN802

CLN801

SP-L 1

GND 2

+5V

TO IF/VIDEO

BLOCK DIAGRAM

WF6

AUDIO1

SIF/BB

INPUT

VCA

SIF

DEMOD

P-ON-H

1-4

LCD Block Diagram

L3120BLLCD

CN311

IF/VIDEO

BLOCK

DIAGRAM

CN103A

OR(0)34 OR(1)33

LCD MAIN CBA UNIT

VIDEO SIGNAL

CVBS 13

S-VIDEO-C 17

CN103B

IC333 (LCD DRIVE / SIGNAL PROCESS)

S-VIDEO-Y 15

LCD MODULE

OR(2)32 OR(3)31 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

CN311

170

169

166

165

164

163

162

161

157

156

155

154

153

152

148

147

146

145

138

137

136

135

130

129

128

127

126

125

118

117

116

115

114

113

108

107

101

105

106

144

139

172

173

174

A/D

VIDEO

SIGNAL

PROCESS

LCD RGB

SIGNAL

PROCESS

B(EVEN)

G(EVEN)

R(EVEN)

B(ODD)

G(ODD)

R(ODD)

CN312

A/D

WF3

ODDINV

EVENINV

STH-1

POL

OFFEV

STV1

CLKV

CLKH10

143

CLKH1

WF1

WF5

WF2

CVBS

R201

R202

R394

R365

R392

WF4

2-1 LC2N_SC

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 = 103, M = 106).

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

4. All capacitance values are indicated in µF (P = 10-6 µF).

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

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.

(Top View) (Bottom View)

(Bottom View)

Electrolytic Capacitor

Transistor or Digital Transistor

NPN Transistor PNP Transistor

NPN Digital Transistor PNP Digital Transistor

(Top View)

E C B

Digital Transistor

CBA Symbols Schematic Diagram Symbols

E C B

(Top View)

E C B

2-2 LC2N_SC

LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON

THE FOLLOWING PAGES:

1. CAUTION:

CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME

TYPE_A,_V FUSE.

ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE_A,_V.

2. CAUTION:

Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit.

If Main Fuse (F601) is blown, first check to see that all components in the power supply circuit are not

defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components

in the power supply circuit to fail.

3. Note:

1. Do not use the part number shown on the drawings for ordering. The correct part number is shown in the

parts list, and may be slightly different or amended since the drawings were prepared.

2. To maintain original function and reliability of repaired units, use only original replacement parts which are

listed with their part numbers in the parts list section of the service manual.

4. Voltage indications on the schematics are as shown below:

Plug the TV power cord into a standard AC outlet.:

5. How to read converged lines

6. Test Point Information

15.0

(3.0) 5.0

(3.0)

Voltage Indicates that the voltage

is not consistent here.

Power on mode

Power off mode

(Unit: Volt)

ABCD

1-B1

1-D3

AREA D3

AREA B1

1-D3

Distinction Area

Line Number

(1 to 3 digits)

Examples:

1. "1-D3" means that line number "1" goes to the line number

"1" of the area "D3".

2. "1-B1" means that line number "1" goes to the line number

"1" of the area "B1".

: Indicates a test point with a jumper wire across a hole in the PCB.

: Used to indicate a test point with a component lead on foil side.

: Used to indicate a test point with no test pin.

: Used to indicate a test point with a test pin.

2-3

Main 1/5 Schematic Diagram

L3120SCM1

MAIN 1/5

Ref No. Position

IC531 D-4

IC533 E-3

IC671 E-2

IC672 E-2

Q501 C-4

Q502 C-4

Q503 B-3

Q505 C-3

Q509 C-3

Q510 B-2

Q511 C-3

Q512 C-2

Q513 C-2

Q531 D-3

Q633 E-1

CN101A A-4

CN102A A-3

ICS

TRANSISTORS

CONNECTORS

2-4 L3120SCM2

Main 2/5 Schematic Diagram

MAIN 2/5

Ref No. Position

IC31 I-1

IC851 H-3

IC852 J-4

Q32 J-2

CN113 G-1

ICS

TRANSISTOR

CONNECTOR

2-5

Main 3/5 Schematic Diagram

L3120SCM3

MAIN 3/5

Ref No. Position

IC781 P-3

IC801 N-2

Q701 N-3

Q702 N-3

Q703 N-3

Q704 P-1

Q705 O-1

Q706 P-1

Q707 P-2

Q708 P-2

Q802 O-1

Q803 N-1

CN801 M-4

CN802 M-3

CN103A M-2

ICS

TRANSISTORS

CONNECTORS

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