Sylvania LC370SL8 Manual de usuario

SERVICE MANUAL

This 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

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

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Different parts from the original model (LC370SS8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

SUPPLEMENT

1-1

Power Supply Block Diagram

A71G1BLP

HOT

COLD

POWER SUPPLY CBA

INVERTER CBA

HOT CIRCUIT. BE CAREFUL.

TO DIGITAL

MAIN CBA UNIT

(CN3010)

Q602

SWITCHING

CONTROL

3 2

IC603

IC637

T601

CN601

TO INVERTER

BLOCK DIAGRAM

CN501

+3.3V

REG

HOT-GND 3

ACL 1

P-ON+9V 8

P-ON+5V 6,7

+2.5V

14-16

+4V

10-12

+15V 18

AL+3.3V 4

+5V/+12V-LCD 2,3

+35V 20

F501

4A/125V

LINE

FILTER

L503

AC501

AC CORD

LINE

FILTER

L502

BRIDGE

RECTIFIER

ACL

HOT-GND

D502 - D505

4A 125V

SHUNT

REG

Q601

SWITCHING

Q801

AMP+13V

P-ON+9V

P-ON-H

TO SYSTEM

CONTROL

BLOCK

DIAGRAM

AL+3.3V

CN301

+9V REG

Q639,Q640

Q641

Q638

Q637

Q644

JS632

Q635

Q633

Q636

SW +13V

Q632

Q631

Q643

JS612

Q650

SW +5V

Q1,Q2,Q3

DIGITAL SUB CBA

TO DIGITAL

MAIN CBA UNIT

(CN3025)

D+1.0V-VDDC 1,2

+2.5V-UNDER 3

+2.5V 4,5

CN1

CAUTION !

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

If Main Fuse (F501) is blown , 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.

For continued protection against risk of fire,

replace only with same type 4 A, 125V fuse.

CAUTION ! :

ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V.

4A/125V

NOTE:

The voltage for parts in hot circuit is measured using

hot GND as a common terminal.

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

15.0 5.0

Voltage Indicates that the voltage

is not consistent here.

Power on 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 A71G1SCP1

Power Supply 1/2 & Digital Sub Schematic Diagram

NOTE:

The voltage for parts in hot circuit is measured using

hot GND as a common terminal.

CN301

2 12.2

3 12.2

43.4

65.0

75.0

89.2

10 5.1

11 5.1

12 5.1

13 0

14 2.5

15 2.5

16 2.5

17 0

18 15.6

19 0

20 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

DIGITAL SUB CBA

INVERTER

CBA

FUNCTION

CBA

TU3001 TUNER UNIT

AC501

AC CORD

POWER SUPPLY CBA

DIGITAL MAIN CBA UNIT

IR SENSOR

CBA

P-ON+9V

GND

AUDIO(L)

GND

AUDIO(R)

GND

SDA1

SCL1

S-VIDEO-Y

VIDEO-Pr

S-VIDEO-C

GND

VIDEO-Pb

GND

VIDEO

VIDEO-Y

CN3018

GND

D+5V

CN7501

CN3023

D+5V/+12V-LCD

GND

IX-TX3(+)

IX-TX3(-)

GND

IX-CLK(+)

IX-CLK(-)

GND

IX-TX2(+)

IX-TX2(-)

GND

IX-TX1(+)

IX-TX1(-)

GND

IX-TX0(+)

IX-TX0(-)

GND

VCOM

GND

LCD MODULE ASSEMBLY

CN301CN3010

GND

AL+3.3V

GND

P-ON+5V

P-ON+9V

+4V

GND

+4V

+2.5V

GND

+2.5V

GND

+15V

+35V

GND

PROTECT2

PROTECT1

+5V/+12V-LCD

CN3001

CN552

GND

PROTECT2(NU)

PROTECT3(NU)

PROTECT1

P-ON-H

BACKLIGHT-PWM

BACKLIGHT-ON

GND

PROTECT3

SCL

GND

SDA

GND

REMOTE

AMP-STBY

AMP-MUTE

GND

AUDIO(L)-OUT

AUDIO(R)-OUT

LED2

GND

LED1

GND

CN302

P-ON-H

GND

CN3014

CLN802

CN802

SP-P(L)

SP-N(L)

CLN801

CN801

SP-P(R)

SP-N(R)

SP802

SPEAKER

L-CH

SP801

SPEAKER

R-CH

JACK CBA

COMPONENT

-Y-IN2

COMPONENT

-Pb-IN2

COMPONENT

-Pr-IN2

COMPONENT

-Y-IN1

COMPONENT

-Pb-IN1

COMPONENT

-Pr-IN1

COMPONENT-

AUDIO(L)-IN1

COMPONENT-

AUDIO(R)-IN1

COMPONENT-

AUDIO(L)-IN2

COMPONENT-

AUDIO(R)-IN2

VIDEO-IN1

AUDIO(L)

-IN1

AUDIO(R)

-IN1

VIDEO-IN2

AUDIO(L)

-IN2

AUDIO(R)

-IN2

S-VIDEO

-IN2

S-VIDEO

-IN1

CN102 CN3002

GND

AL+3.3V

KEY-IN1

KEY-IN2

CN601 CN501

ACL

HOT-GND

CN101B CN001

GND

REMOTE

AL+3.3V

LED2

LED1

BACK

LIGHT

CN1050

BACK

LIGHT

CN1100

BACK

LIGHT

CN1150

BACK

LIGHT

CN1200

BACK

LIGHT

CN1250

BACK

LIGHT

CN1300

BACK

LIGHT

CN1350

BACK

LIGHT

CN1400

HDMI-

AUDIO(L)-IN

HDMI-

AUDIO(R)-IN

AUDIO(L)

-OUT

AUDIO(R)

-OUT

HDMI-

CONNECTOR-1

DIGITAL

AUDIO OUT

(COAXIAL)

CN3025 CN1

D+1.0V-VDDC

+2.5V-UNDER

+2.5V

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 0.47

F/16V

CHD1CK30B474

C803

CHIP CERAMIC CAP.(1608) B K 0.47

F/16V

CHD1CK30B474

C806

CHIP CERAMIC CAP.(1608) B K 0.047

F/50V

CHD1JK30B473

C807

CHIP CERAMIC CAP.(1608) B K 0.047

F/50V

CHD1JK30B473

C809

CHIP CERAMIC CAP.(1608) B K 0.047

F/50V

CHD1JK30B473

C810

CHIP CERAMIC CAP.(1608) B K 0.047

F/50V

CHD1JK30B473

C842

CHIP CERAMIC CAP.(1608) B K 0.47

F/16V

CHD1CK30B474

C843

CHIP CERAMIC CAP.(1608) B K 0.47

F/16V

CHD1CK30B474

L801 COIL RADIAL LHLP10NB680M 68µH LLF6800TU003

L802 COIL RADIAL LHLP10NB680M 68µH LLF6800TU003

L803 COIL RADIAL LHLP10NB680M 68µH LLF6800TU003

L804 COIL RADIAL LHLP10NB680M 68µH LLF6800TU003

R654 CARBON RES. 1/4W J 4.7K ΩRCX4JATZ0472

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

Q2 PNP TRANSISTOR POWER 2SA1887(F)

QQWZ2SA1887F

Q3 PNP TRANSISTOR POWER 2SA1887(F)

QQWZ2SA1887F

R1 METAL OXIDE FILM RES. 2W J 0.68 ΩRN02R68DP004

R3 METAL OXIDE FILM RES. 2W J 0.68 ΩRN02R68DP004

R4 METAL OXIDE FILM RES. 2W J 0.68 ΩRN02R68DP004

R5 METAL OXIDE FILM RES. 2W J 0.68 ΩRN02R68DP004

Ref. No. Description Part No.

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.

LC370SL8

A71G1UH

2007-08-06

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