Sharp DV-740/T Manual de usuario

DV-740/X/W/T

S81Z3DV-740XX

SERVICE MANUAL

MODEL

Page

1. IMPORTANT SAFEGUARDS AND PRECAUTIONS ........................................................................... 2

2. FEATURES ........................................................................................................................................ 3

3. SPECIFICATIONS .............................................................................................................................. 3

4. PART NAMES ................................................................................................................................... 4

5. REMOTE CONTROL UNIT ................................................................................................................. 6

6. EXTENSION CABLE USE POINT (FOUR PLACES) ........................................................................... 7

7. SERVICE (TROUBLE SHOOTING FLOW CHART) ............................................................................. 8

8. NORMAL WAVEFORM ................................................................................................................... 11

9. IC FUNCTION LIST ........................................................................................................................... 19

10. BLOCK CIRCUIT SCHEMATIC DIAGRAMS ..................................................................................... 30

11. MAINBOARD ................................................................................................................................... 50

12. DISPLAY/OPTION BOARD .............................................................................................................. 56

13. POWER BOARD ............................................................................................................................. 58

14. PWB COMPONENT LIST ................................................................................................................ 60

15. REPLACEMENT PARTS LIST/EXPLODED VIEWS ......................................................................... 64

16. PACKING OF THE SET ................................................................................................................... 65

17. LOADER SET ................................................................................................................................. 67

CONTENTS

In the interests of user-safety (Required by safety regulations

in some countries) the set should be restored to its original

condition and only parts identical to those specified be used.

SERVICE MANUAL DVD VIDEO PLAYER MODELS DV-720S/720S(K)/720H

DVD VIDEO PLAYER

SHARP CORPORATION

DV-740/T

DV-740X/W

TENTATIVE

DV-740/X/W/T

1. IMPORTANT SAFEGUARDS AND PRECAUTIONS

Power Lead Protection

To avoid any malfunctions of the unit, and to protect

against electric shock, fire or personal injury, please

observe the following,

Hold the plug firmly when connecting or

disconnecting the AC power lead.

Keep the AC power lead away from heating

appliances.

Never put any heavy object on the AC power lead.

 Do not attempt to repair or reconstruct the AC

power lead in any way.

Note:

This unit can be used only where the power

supply is AC 100V-240V, 50/60Hz. It cannot

be used elsewhere.

CAUTION:

USE OF CONTROLS OR ADJUSTMENTS OR

PERFORMANCE OF PROCEDURES OTHER

THAN THOSE SPECIFIED HEREIN MAY

RESULT IN HAZARDOUS RADIATION

EXPOSURE.

AS THE LASER BEAM USED IN THIS PLAYER

IS HARMFUL TO THE EYES, DO NOT

ATTEMPT TO DISASSEMBLE THE CABINET.

REFER SERVICING TO QUALIFIED

PERSONNEL ONLY.

WARNING:

TO REDUCE THE RISK OF FIRE OR

ELECTRIC SHOCK, DO NOT EXPOSE THIS

EQUIPMENT TO RAIN OR MOISTURE.

TO REDUCE THE RISK OF FIRE OR

ELECTRIC SHOCK, AND ANNOYING

INTERFERENCE, USE THE RECOMMENDED

ACCESSORIES ONLY.

Laser Diode Properties

Material: AlGalnP

Wave length: 635 nm

Emission Duration: Continuous

Laser output: Max. 0.5 mW

This player is classified as a CLASS 1 LASER product.

The CLASS 1 LASER PRODUCT label is located on

the rear cover.

 This product contains a low power laser device. To

ensure continued safety do not remove any cover or

attempt to gain access to the inside of the product.

Refer all servicing to qualified personnel.

CLASS 1

LASER PRODUCT

(Rear of product)

DVD LOADER

Model No: SL-101H

Rating: 5V==0.6A 12V==1.2A

CLASS 1 LASER PRODUCT

“Complies with FDA radiation performance

standards, 21 CFR Subchapter J”

DANGER-

VISIBLE AND INVISIBLE LASER RADIATION

WHEN OPEN, AVOID DIRECT EXPOSURE TO

BEAM.

DV-740/X/W/T

•Playback of DVD, VIDEO CD, and Audio CD

•Dolby Digital*2, DTS*3, MPEG Audio digital out

*1Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol ( ) are trademarks of Dolby

Laboratories.

*2"DTS" and "DTS Digital Surround" are trademarks of Digital Theater Systems, Inc.

2. FEATURES

3. SPECIFICATIONS

Specifications are subject to change without notice.

Weight and dimensions are approximate.

Digital Output (Linear PCM)

The digital output format (optical or coaxial) used in this Player is linear PCM audio sampled at 44.1 kHz or 48 kHz.

Linear PCM sound for DVD video discs sampled at 96 kHz cannot be output digitally.

Check the disc jacket for information on the audio sampling used.

TYPE SPECIFICATION

Power Supply type Switch Mode Power Supply

Input Voltage AC100V~240V(Auto Voltage Swithcing)

Mains Frequency 50/60Hz

Standby Power Consumption Less than 5W

Power Rating Less than 20W

Signal System NTSC/PAL

Disc compatibility DVD,VCD,VCD2.0,SVCD,CD-DA,MP3,

CD-R,CD-RW

Operating Temperature Range +5°C ~ +40°C

Media Format (1)DVD

single side/single layer ;single side/double layer

double side/single layer ;double side/double layer

(2)CD-DA

12cm CD

8cm CD

CD-R

CD-RW

(3)MP3

(4)VCD

Video Signal Composite Output Level: 1.0±0.15Vp-p(75ohm)

S-Video Output Level:

Y 1.0±0.15Vp-p

C 0.286±0.05Vp-p

BURST 0.30±0.06V

Y.U.V Output Level:

Y-CH 1.0±0.15Vp-p

U-CH 1.0±0.15Vp-p

V-CH 1.0±0.15Vp-p

R.G.B Output Level:

1.0±0.15Vp-p

Remark:The video output connectors are optional in line with various models of products.

Audio Signal Output Level: 2.0±0.2 Vrms(at 1KHz)

Freq Resp ±1dB

S/N 105dB

Dynamic Range(1kHz) 96dB

Distortion&Noise(1kHz) ≤≤

≤≤

≤-65dB

Digital Output Coaxial

Remark:The digital output connectors are optional in line with various models of products.

DV-740/X/W/T

For details on the use of each control.

4. PART NAMES

3-1. ACCESSORIES

Accessories: Video/Audio(L/R) cable x 1, AAA (UM4) batteries x 2, Remote control unit x 1,

Operation Manual x 1,

1. OPERATE Switch Button

Turn the unit’s power on and off.

2. OPEN/CLOSE Button

Open or closes the disc tray.

3. Disc Tray

To place DVD, VCD, Audio CD, and MP3 discs on.

4. STOP Button

Stop playback.

5. PLAY Button

Play the inserted disc.

6. STANDBY Indicator

LED Indicator of Standby mode.

7. Display Window

Display operation information.



SKIP Button

Go to the previous chapter/track during playback with DVD/

VCD/Audio CD. It functions as “Go to the previous page”

in the PBC menu with VCD discs.



REV Button

Reverse scans.

10. FWD



Button

Forward scan.

11. SKIP



Button

Go to the next chapter/track during playback with DVD/

VCD/Audio CD. It functions as “Go to the next page” in

the PBC menu with VCD discs.

4-1 Main Unit(Front)

1. Disc inside indicator

2. DTS®Digital Audio Indicator

Indicate the disc played contains DTS®Digital audio encoding.

3. Title/Track Number Indicator

Some DVDs contain multiple title pages. This indicator displays

the title number currently in use or track number (Audio CD)

currently playing.

4. SVCD/Audio CD/VCD Indicator

Identfy the inserted disc as audio SVCD and Audio CD or

Video CD.

5. Dolby®Digital Audio Indicator

Indicate the played disc contains Dolby®Digital Audio

encoding data.

6. DVD Indicator

Identfy the inserted disc as a DVD disc.

7. PBC Indicator for VCD Disc

Playback Cntrol indicator.

8. MP3 Indicator

Identfy the inserted disc as a MP3 disc.

9. Analog Audio Output Indicator

Indicate the audio sound output from analog audio jacks

when playing back VCD/SCVD/Audio CD.

10. Elapsed Playback Time/Remaining Playback Time

Indicator

Display elapsed playback time and playback remainder

time.

4-2 Front panel Display in Main Unit

DV-740/X/W/T

VIDEO OUT jack

Connect a standard video cable here when connecting to a TV with a video input jack.

2. S-VIDEO OUT jack

Connect an S-VIDEO cable here when connecting to a TV with an S-VIDEO input jack. This type of

connection provides Superior picture quality.

3. COMPONENT OUT (Y/PB/PR) jacks

Connect a standard COMPONENT (Y/PB/PR) cable here when connecting to a TV COMPONENT (Y/PB/

PR) input jack.

4. R/L AUDIO OUT jacks

Connect standard audio cable here when connecting to a TV or audio input jack.

5. DIGITAL OUT (Coaxial) jack

Connect a coaxial cable here when connecting to a device with a coaxial digital audio input jack.

4-3 Main Unit(Rear)

DV-740/X/W/T

5. REMOTE CONTROL UNIT

1 OPEN/CLOSE Button

2 SETUP Button

3 AUDIO Button

4 ANGLE Button

5 SUBTITLE Button

6 3D Surround Sound Button

7 MUTE Button

8 VOCAL Button

9 A - B Button

10 TITLE Button

11 Cursor Left Key

12 Volume Level Reducing Button

13 SLOW Button

14 STEP Button

15 PREVIOUS Button

16 FAST REVERSE Button

17 FAST FORWARD Button

18 NEXT Button

19 STOP Button

20 DISPLAY Button

21 Cursor Down Key

22 Volume Level Increasing Button

23 ENTER/PLAY Button

24 Cursor Right Key

25 Cursor Up Key

26 MENU Button

27 REPEAT Button

28 GOTO Button

29 Numeric Buttons

30 Zoom Button

31 PBC Button

32 PROGRAM Button

33 POWER/STAND BY Button

DV-740/X/W/T

6. EXTENSION CABLE USE POINT

141 9HLCP1614 -1- - - J2 Loader to Main Board 40Pin

142 9HLCS1679 -1- - - JP5 Power Board to Loader 4Pin

143 9HLDP1199 -1W - - CN1-J3 Panel Board to Main Board 12Pin

144 9HLCP1613 -1 - - - JP7-J1 Power Board to Main Board 14Pin

EXTENSION CABLE LIST

MECHANISM EXPLODED VIEW

DV-740/X/W/T

TROUBLESHOOTING FLOW CHART

Power troubleshooting

Unplug AC power cord See flow chart F1 blown

replug it a few seconds later out

YES NO

Is the fuse good ? NO Replace fuse

YES

Is AT 5V voltage normal ? NO Check primary circuit

YES

Is AT -28V voltage normal ? NO Check D5,R16

YES

Is AT 3.6V voltage normal ? NO Check RG(AMS1085)

R26,R4&circuit

YES

Is JP7 pin10 base pin “H”? NO Check MPEG decoder U1 pin

167 AUX5 “H” and line circuit

YES

Check Q1,2,5,6,7,8,9 circuit ?

In case fuse(F1) blown out

Replace F1 check D001-004, Checkshort-circuit

IC1,if poor

replace at the same time

7. SERVICE

No power

DV-740/X/W/T

Picture does not operate normally.

Set the disc on the disc tray.

Are the video signals outputted to the pins

of video encoder chip U11?

U11 32PIN CVBS

U11 27PIN S-Y/YUV-Y

U11 26PIN S-C/YUV-Cr

U11 31PIN YUV/Cb

Is the setup menu “TV OUTPUT” se

correct?

YES

Set it correct.

Check other pin o

U11.

Make sure

Pin38-42, 2-4;

Pin23 SCLOCK,

Pin24 SDATA,

Pin44 CLOCK

work normally.

Replace U11.

YES

Check U1.

Are the video signals outputted to eac

emitter of the Q12, Q17, Q18, and Q19?

Q12, Q17, Q18, Q19 is video buffer.

Q12: YUV-Y/S-Y

Q18: YUV-Cr/S-C

Q17: YUV-Cb

Q19: CVBS

Check the each buffe

and each filter.

YES

Are the video signals outputted to the

specific output terminal?

Are the composite video signals outputte

to the Video Out terminal (Pin1 of P5)?

Are the Y/C signals outputted to the

S-Video out terminal (Pin5, 3 of P5)?

Are the YUV signals outputted to the YUV

Out terminal (Pin1, 2,3 of P5)?

YES

Check the connect circuit fro

Q19 to P5.

Check the connect circuit from

Q12 and Q18 to P5.

Check the connect circuit fro

Q12 and Q17 and Q18 to P4.

DV-740/X/W/T

Sound does not operate normally.

Set the disc on the disc tray.

Are the digital signals inputted to the

pins of audio D/A convert U12?

U12 PIN2 SDATA

U12 PIN3 SCLK

U12 PIN4 LRCK

U12 PIN5 MCLK

Is the setup menu “AUDIO OUTPUT” se

correct?

YES

Set it correct.

Replace U12.

YES

Check U1.

Are the analog audio signals outputted to

the amplifiers?

U12 PIN12 AOUTL

U12 PIN16 AOUTR

Make sure the mute

pin is “L” level.

U12 PIN16 MUTEC

YES

Are the L/R analog audio signals outputte

to the specific output terminal?

P3 2PIN LEFT OUT

P3 3PIN RIGHT OUT

YES

Check the audio amplifiers

U16 and peripheral circui

and make sure it works

normally.

Check U1.

Check the audio mute circui

works normally.

YES

Check

the

connect

circuit.

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