Sylvania LC370SL8 Service Manual

SERVICE MANUALThis service manual shows only the differences between the model LC370SL8 and the original model LC370SS8.All other information is described in the service manual of the model LC370SS8.

37″ COLOR LCD TELEVISION

LC370SL8

TABLE OF CONTENTS

Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Schematic Diagrams / CBA’s and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Different parts from the original model (LC370SS8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

SUPPLEMENT

1-1

Power Supply Block Diagram

A71G1BLP

HO

T

HO

T

CO

LD

PO

WE

R S

UP

PLY

CB

A

INV

ER

TE

R C

BA

HO

T C

IRC

UIT

. BE

CA

RE

FU

L.

TO D

IGIT

AL

MA

IN C

BA

UN

IT(C

N30

10)

Q60

2S

WIT

CH

ING

CO

NT

RO

L

14 3

2

IC60

3

IC63

7

T60

1C

N60

1

TO IN

VE

RT

ER

BLO

CK

DIA

GR

AM

CN

501

4

+3.

3VR

EG

HO

T-G

ND

3A

CL

131

P-O

N+

9V8

P-O

N+

5V6,

7

+2.

5V14

-16

+4V

10-1

2

+15

V18

AL+

3.3V

4+

5V/+

12V

-LC

D2,

3

+35

V20

F50

14A

/125

VLI

NE

FIL

TE

R

L503

AC

501

AC

CO

RD

LIN

EF

ILT

ER

L502

BR

IDG

ER

EC

TIF

IER

AC

LH

OT-

GN

D

D50

2 -

D50

5

4A 1

25V

2

16 15 10 14 9 13 12 1176

SH

UN

TR

EG

Q60

1S

WIT

CH

ING

Q80

1

AM

P+

13V

P-O

N+

9V

P-O

N-H

TO

SY

ST

EM

CO

NT

RO

LB

LOC

K

DIA

GR

AM

AL+

3.3V

CN

301

+9V

RE

G

Q63

9,Q

640

Q64

1

Q63

8

Q63

7

Q64

4

JS63

2

Q63

5

Q63

3

Q63

6

SW

+13

V

Q63

2

Q63

1

Q64

3

23

JS61

2Q65

0S

W +

5V

Q1,

Q2,

Q3

DIG

ITA

L S

UB

CB

A

TO D

IGIT

AL

MA

IN C

BA

UN

IT(C

N30

25)

D+

1.0V

-VD

DC

1,2

+2.

5V-U

ND

ER

3+

2.5V

4,5

CN

1

CA

UT

ION

!F

ixed

vol

tage

(or

Aut

o vo

ltage

sel

ecta

ble)

pow

er s

uppl

y ci

rcui

t is

used

in th

is u

nit.

If M

ain

Fus

e (F

501)

is b

low

n , c

heck

to s

ee th

at a

ll co

mpo

nent

s in

the

pow

er s

uppl

yci

rcui

t are

not

def

ectiv

e be

fore

you

con

nect

the

AC

plu

g to

the

AC

pow

er s

uppl

y.O

ther

wis

e it

may

cau

se s

ome

com

pone

nts

in th

e po

wer

sup

ply

circ

uit t

o fa

il.

For

con

tinue

d pr

otec

tion

agai

nst r

isk

of fi

re,

repl

ace

only

with

sam

e ty

pe 4

A, 1

25V

fuse

.C

AU

TIO

N !

:

AT

TE

NT

ION

: U

tilis

er u

n fu

sibl

e de

rec

hang

e de

mêm

e ty

pe d

e 4

A, 1

25V

.4A

/125

V

NO

TE

:T

he v

olta

ge fo

r pa

rts

in h

ot c

ircui

t is

mea

sure

d us

ing

hot G

ND

as

a co

mm

on te

rmin

al.

BLOCK DIAGRAMS

2-1 LC4N_SC

SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS

Standard Notes

WARNING

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.

2-2 LC4N_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 (F501) 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

2 315.0 5.0

Voltage Indicates that the voltage is not consistent here.

Power on mode(Unit: Volt)

3

2

1

A B C D

1-B1

1-D3

AREA D3

AREA B1

1-D3

Distinction AreaLine 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 A71G1SCP1

Power Supply 1/2 & Digital Sub Schematic Diagram

NOTE:The voltage for parts in hot circuit is measured usinghot GND as a common terminal.

CN301

1 02 12.23 12.24 3.45 06 5.07 5.08 9.29 010 5.111 5.112 5.113 014 2.515 2.516 2.517 018 15.619 020 34.6

21 0

22 3.2

23 1.1

VOLTAGE CHART

Pin No. Voltage

2-4

Digital Main 5/9 Schematic Diagram

A71G1SCD5

1 NOTE:The order of pins shown in this diagram is different from that of actual IC3015.IC3015 is divided into four and shown as IC3015 (1/4) ~ IC3015 (4/4) in this Digital Main Schematic Diagram Section.

2-5

Digital Sub CBA Top & Bottom View

BA71F0F01061

WIRING DIAGRAM

A71G1WI3-1

DIG

ITA

L S

UB

CB

A

INV

ER

TE

RC

BA

FU

NC

TIO

NC

BA

TU

3001

TU

NE

R U

NIT

AC

501

AC

CO

RD

PO

WE

R S

UP

PLY

CB

A

DIG

ITA

L M

AIN

CB

A U

NIT

IR S

EN

SO

RC

BA

1 32 54 76 8 9 10 131211 14 15 1716 1918 2120 22 23

P-O

N+

9V

GN

DN

UG

ND

NU

NU

AU

DIO

(L)

GN

DA

UD

IO(R

)

GN

D

GN

D

SD

A1

SC

L1

S-V

IDE

O-Y

VID

EO

-Pr

S-V

IDE

O-C

GN

D

VID

EO

-Pb

GN

D

GN

D24

VID

EO

VID

EO

-Y

CN

3018

GN

DD

+5V

CN

7501 15 39 7 24681014 1218 16 111315171923 21 202224

CN

3023

1D

+5V

/+12

V-LC

DD

+5V

/+12

V-LC

DD

+5V

/+12

V-LC

DD

+5V

/+12

V-LC

DD

+5V

/+12

V-LC

D

2 3 4 5 6G

ND

GN

DG

ND

7 8 9IX

-TX

3(+

)10

IX-T

X3(

-)11

GN

D12

IX-C

LK(+

)13

IX-C

LK(-

)14

GN

D15

IX-T

X2(

+)

16IX

-TX

2(-)

17G

ND

18IX

-TX

1(+

)19

IX-T

X1(

-)20

GN

D21

IX-T

X0(

+)

22IX

-TX

0(-)

23G

ND

GN

DG

ND

24 25 26V

CO

M27

NU

28G

ND

GN

DG

ND

29 30

LC

D M

OD

UL

E A

SS

EM

BLY

CN

301

CN

3010

2319 2115 17 222018161410 126 8 13119751 3 4

2319 2115 17 222018161410 126 8 13119751 3 4

2G

ND

AL+

3.3V

GN

DP

-ON

+5V

P-O

N+

5VP

-ON

+9V

+4V

GN

D+

4V

+4V

+2.

5V

GN

D+

2.5V

+2.

5V

GN

D

GN

D+

15V

+35

VG

ND

PR

OT

EC

T2

PR

OT

EC

T1

+5V

/+12

V-L

CD

+5V

/+12

V-L

CD

2

CN

3001

1 32 4 5 76 8

CN

552 1

GN

D

3P

RO

TEC

T2(N

U)

2P

RO

TEC

T3(N

U)

4P

RO

TE

CT

15

P-O

N-H

7BA

CKLI

GHT

-PW

M6

BAC

KLI

GH

T-O

N

8G

ND

PR

OT

EC

T3

SC

LG

ND

SD

A

GN

DR

EM

OT

E

NU

AM

P-S

TB

YA

MP

-MU

TE

NU

GN

D

GN

DA

UD

IO(L

)-O

UT

AU

DIO

(R)-

OU

T

LED

2

GN

DLE

D1

NU

NU

GN

DN

U

CN

302

P-O

N-H

GN

D

CN

3014 2319 2115 17 222018161410 126 8 13119751 3 42

2319 2115 17 222018161410 126 8 13119751 3 42C

LN80

22

CN

802

1S

P-P

(L)

SP

-N(L

)

CLN

801

2C

N80

1

1S

P-P

(R)

SP

-N(R

)

SP

802

SP

EA

KE

RL-

CH

SP

801

SP

EA

KE

RR

-CH

JAC

K C

BA

CO

MP

ON

EN

T-Y

-IN

2

CO

MP

ON

EN

T-P

b-IN

2

CO

MP

ON

EN

T-P

r-IN

2

CO

MP

ON

EN

T-Y

-IN

1

CO

MP

ON

EN

T-P

b-IN

1

CO

MP

ON

EN

T-P

r-IN

1

CO

MP

ON

EN

T-

AU

DIO

(L)-

IN1

CO

MP

ON

EN

T-

AU

DIO

(R)-

IN1

CO

MP

ON

EN

T-

AU

DIO

(L)-

IN2

CO

MP

ON

EN

T-

AU

DIO

(R)-

IN2

VID

EO

-IN

1

AU

DIO

(L)

-IN

1

AU

DIO

(R)

-IN

1

VID

EO

-IN

2

AU

DIO

(L)

-IN

2

AU

DIO

(R)

-IN

2

S-V

IDE

O-I

N2

S-V

IDE

O-I

N1

CN

102

CN

3002

1 32 4 5

GN

DA

L+3.

3VK

EY-

IN1

NU

6N

U

KE

Y-IN

2

15 3 246

CN

601

CN

501

1 3

1 32

AC

LN

UH

OT-

GN

D2

CN

101B

CN

001

1 32 4 5

GN

DR

EM

OT

EA

L+3.

3V

NU

6LE

D2

NU

62 4 5

7LE

D1

8N

U8731

BA

CK

LIG

HT

CN

1050

21

BA

CK

LIG

HT

CN

1100

21

BA

CK

LIG

HT

CN

1150

21

BA

CK

LIG

HT

CN

1200

21

BA

CK

LIG

HT

CN

1250

21

BA

CK

LIG

HT

CN

1300

21

BA

CK

LIG

HT

CN

1350

21

BA

CK

LIG

HT

CN

1400

21

HD

MI-

AU

DIO

(L)-

IN

HD

MI-

AU

DIO

(R)-

IN

AU

DIO

(L)

-OU

T

AU

DIO

(R)

-OU

T

HD

MI-

CO

NN

EC

TO

R-1

DIG

ITA

LA

UD

IO O

UT

(CO

AX

IAL)

CN

3025

CN

11 32 4 5

D+

1.0V

-VD

DC

D+

1.0V

-VD

DC

+2.

5V-U

ND

ER

+2.

5V+

2.5V

2 4 531

20070718 4-1 A71G1PL

Different parts from the original model (LC370SS8)

Ref. No. Description Part No.

MECHANICAL PARTS

A1 FRONT CABINET 37V A71G1UH 1EM021806

A4 REAR CABINET 37V A71G3UH 1EM021802

A6# RATING LABEL A71G1UH ----------

A9 STAND COVER 37V A71G1UH 1EM021807

A11 LED LENS A71A2UH 1EM322718

A14 JACK PLATE A71A1UH 1EM221627

A21 Not used

A22 Not used

B6 JACK HOLDER D A71A1UH 1EM221626

B28 Not used

B43 Not used

L19 Not used

SP801 SPEAKER MAGNETIC YDP613-23 DSD1611EFU01

SP802 SPEAKER MAGNETIC YDP613-23 DSD1611EFU01

S12 CARTON (U) A71G1UH 1EM424586

X2# OWNERS MANUAL A71G1UH 1EMN22307

X9 Not used

ELECTRICAL PARTS

DIGITAL MAIN CBA UNIT 1ESA14700

MPS CBA 1ESA14701

POWER SUPPLY CBA(MPS-1) ----------

C802 CHIP CERAMIC CAP.(1608) B K 0.47µF/16V CHD1CK30B474


C806 CHIP CERAMIC CAP.(1608) B K 0.047µF/50V CHD1JK30B473






L801 COIL RADIAL LHLP10NB680M 68µH LLF6800TU003




R654 CARBON RES. 1/4W J 4.7K Ω RCX4JATZ0472

JACK CBA(MPS-4) ----------

C7515 Not used

C7516 Not used

R7515 Not used

R7516 Not used

R7517 Not used

R7518 Not used

JK7501 Not used

DIGITAL SUB CBA 1ESA15014

CN1 ANGLE PIN HEADER IMSA6029B105Z003PT1

JTED005ER045

Q1 PNP TRANSISTOR POWER 2SA1887(F) QQWZ2SA1887F



R1 METAL OXIDE FILM RES. 2W J 0.68 Ω RN02R68DP004




Ref. No. Description Part No.

© 2007 Funai Electric Co., Ltd.

All rights reserved. No part of this manual may be reproduced, copied, transmitted, disseminated, transcribed, downloaded or stored in any storage medium, in any form or for any purpose without the express prior written consent of Funai. Furthermore, any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.

Information in this document is subject to change without notice. Funai reserves the right to change the content herein without the obligation to notify any person or organization of such changes.

with the design is a registered trademark of Funai Electric Co., Ltd and may not be used in any way without the express written consent of Funai. All other trademarks used herein remain the exclusive property of their respective owners. Nothing contained in this manual should be construed as granting, by implication or otherwise, any license or right to use any of the trademarks displayed herein. Misuse of any trademarks or any other content in this manual is strictly prohibited. Funai shall aggressively enforce its intellectual property rights to the fullest extent of the law.

LC370SL8A71G1UH

2007-08-06

Sylvania LC370SL8 Service Manual

Documents

Transcript of Sylvania LC370SL8 Service Manual