Panasonic SL-DV100 Manuale utente

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SL-DV100

Colour

(S)....................Silver Type

Area

(GK).................China.

DVD Changer

AD9908191C3

1 Note 2

2 Handling Precautions for Traverse Deck 2

2.1. Handling of optical pickup 2

2.2. Grounding for electrostatic breakdown prevention 2

3 Precaution of Laser Diode 3

4 Location of Controls 4

5 To Supply Power Source 5

6 What is DVD 6

7 Operation Description 11

8 Optical Pickup Self-diagnosis and Replacement Procedure

9 Self-Diagnosis and Service Modes 14

10 Operation Checks and Component Replacement Procedures

11 Schematic Diagram 33

11.1. Schematic Diagram Notes 33

The lase diode in the optical pickup may break down due to

potential difference caused by static electricity of clothes or

1.Do not subject the optical pickup to static electricity as it is

extremely sensitive to electrical shock.

2.To prevent the breakdown of the laser diode, an antistatic

shorting pin is inserted into the flexible board (FPC board).

When removing or connecting the short pin, finish the job in

as short time as possible.

3.Be careful not to apply excessive stress to the flexible board

(FPC board).

4.Do not turn the variable resistor (Laser power adjustment).

Use the antistatic wrist strap to discharge the static electricity

from your body.

11.2. Schematic Diagram 34

12 Wiring Connection Diagram 50

13 Printed Circuit Board Diagram 51

14 Type Illustration of ICs, Transistors and Diodes 57

15 Block Diagram 58

16 Terminal Function of ICs 63

16.1. IC401 (M38504M6201F) : System Control 63

17 Abbreviations 64

18 Optical Pickup Tilt Adjustments 66

19 Electrical Adjustment 69

20 Replacement Parts List 70

21 Cabinet Parts Location 77

22 Loading Unit Parts Location 78

23 Traverse Unit Parts Location 79

human body.

CONTENTS

Page Page

1 Note

Refer to the service manual for Model No. SA-DV100 (ORDER No. AD9908189C3) for information on Accessories,

Connections, Installation, Operations and Packaging.

2 Handling Precautions for Traverse Deck

2.1. Handling of optical pickup

2.2. Grounding for electrostatic breakdown prevention

2.2.1. Human body grounding

SL-DV100

Put a conductive material (sheet) or steel sheet on the area

where the optical pickup is placed and ground the sheet.

Caution:

This unit utilizes a class 1 laser. Invisible laser radiation is

emitted from the optical pickup lens when the unit is turned

on:

1.Do not look directly into the pickup lens.

2.Do not use optical instruments to look at the pickup lens.

3.Do not adjust the preset variable resistor on the optical

pickup.

4.Do not disassemble the optical pickup unit.

5.If the optical pickup is replaced, use the manufacture´s

specified replacement pickup only.

6.Use of control or adjustment or performance of procedures

other than those specified herein may result in hazardous

radiation exposure.

Caution:

The static electricity of your clothes will not be grounded

through the wrist strap. So take care not to let your clothes

touch the optical pickup.

2.2.2. Work table grounding

3 Precaution of Laser Diode

SL-DV100

4 Location of Controls

SL-DV100

Caution:

·It is very dangerous to look at or touch the laser

beam.(Laser radiation is invisible.)

With the unit turned on, laser radiation is emitted from

the pickup lens.

·Avoid exposure to the laser beam, especially when

performing adjustments.

This unit SL-DV100 is designed to operate on power

supplied form the system connected. For system

connection, refer to Fig.1.

Fig.3.

Notes:

Use only this method when checking the voltage etc..

In case of checking operations, use the system

connections to supply power source.

Fig.1.

When the unit SL-DV100 has to test and service alone, use

the following method to supply power source.

1.Short the JK1-3 pin,JK1-6 pin,JK1-10 and JK1-17.

Refer to Fig.2.

2.Connect a DC power supply to JK1-5 pin and . Then

adjust the output to 10 V. Refer to Fig.3.

5 To Supply Power Source

Fig.2.

SL-DV100

6 What is DVD

TIntroduction

Through a variety of media such as TVs, videos, radios, stereos, newspapers and magazines, we enjoy movies and music and obtain information

every day.

Personal computers have become essential to our daily lives. We are surrounded by an abundance of sound, information and images.As a result,

there is a need for a medium that can accommodate such a vast amount of information easily and in a compact form. To meet this demand, the DVD

has been created.

DVD, which stands for Digital Versatile Disc, is expected to have a wide array of applications including a DVD-Video, which records visual images

such as movies; a DVD-Audio for music; a DVD-ROM for computer use; and a DVD-RAM for rewritable media.

Analog Audio

Analog disc RCompact cassette tape

Digital Audio

CD RDAT

Digital Video

Video-CD

Analog Video

Video cassette tape RLD

The

Generation

DVD

TTypes of DVD

The DVD has two major formats: a Read-only format and a Recordable format.

The recordable format can be divided into a write-once type and a rewritable type.

These discs have different recording method. Therefore, not all equipment is compatible with these formats.

Read only

Recording method

Pit recording (same as CDs)

Disc types

DVD-Video, DVD-Audio, DVD-ROM

Write-once

Recording method

Organic dye recording

Disc types

DVD-R

Rewritable

Recording method

Phase change recording

Disc types

DVD-RAM

Compatible list for Panasonic products

SC-DV100 SA-DK1 near future

DVD-Video øøø

DVD-Audio qqø

DVD-ROM qqq

DVD-R qqq

DVD-RAM qqq

CD-DA øøø

CD-ROM qqq

CD-R qqq

Video-CD øøø

Dolby digital øøø

dts qqø

MPEG Audio øøø

SL-DV100

TDisc Configuration (Read only)

The DVD-ROM disc is designed so that two thin discs are pasted together. The result is that both sides can be recorded on. Also, by employing a

transparent adhesive and a semi-transparent reflective film, a dual-layer configuration recording method has been achieved which allows both

sides of a disc to be played using a single pick-up on one side.

The appearance of the DVD is identical to the CD, and many DVD players are compatible with CDs.

Disc configuration and recording capacity

configration single-layer single-layer dual-layer dual-layer

single sided double sided single sided double sided

capacity 4.7 GB 9.4 GB 8.5 GB 17 GB

Dual-layer , single sided disc

substrate

full-reflective film

protective film

bonding agent

protective film

semi-reflective film

substrate

Dual-layer , double sided disc

semi-reflective film

spacing

full-reflective film

protective film

bonding agent

protective film

full-reflective film

spacing

semi-reflective film

substrate

SL-DV100

Outer appearance

Thick: 1.2 mm (0.6 mm x 2)

Diameter: 120 mm

Center hole diameter: 15 mm

Signal recording section

Pit recording (same method as used for CDs) (case of CD)

Minimum pit size 0.4 ¨m (0.9 ¨m)

Track pitch 0.74 ¨m (1.6 ¨m)

Controller CLV (CLV)

Signal recording side of DVD Signal recording side of CD

TOpticals and Servo Control

In order to increase recording time, the signals are recorded highly compressed on the disc. The signals are all converted to digital signals and

recorded by producing concave and convex areas on the disc as a replacement for 0 and 1. These concave and convex areas are called pits. The

pits are lined up in so-called tracks that spiral from the center to the outside edge of the disc. In order to read these recorded signals, the DVD player

uses a laser diode which outputs short-wavelength light beams, and the opening ratio of the lens to gather the laser beam is set wider. Also, the

rotation of the disc is servo-controlled (CLV) to maintain a stable speed as the laser beam passes over the tracks so that the timing of the read

signals does not fluctuate. The player also uses light beams that have two focal points in order to play both DVDs and CDs because their signal

recording area positions are different.

Panasonic has recently developed and uses a Hologram-integrated aspherical lens for these Laser beams.

CD spot

DVD spot

Hologram-integrated

aspherical lens

Laser diode

Photo detector

SL-DV100

TRecording Time

To meet the demands of a Hollywood film production company, one film must fit onto a single disc while keeping the movie's image quality and audio

quality high.

To achieve this, we compress video images using MPEG2 technology, sub-video

images (superimposed) using run length coding compression; produce high-quality audio using linear PCM, Dolby Digital AC-3, DTS and MPEG

audio; and make the surround system recordable. The resulting recording time is about 133 minutes.

Approximately 93% of Hollywood movies can each be recorded on one disc.

Video image 3.5 Mbit / sec

Audio 1152 kbit / sec

Sub-video image 40 kbit / sec

Total 4.692 Mbit / sec

The recording capacity of a disc is 4.7 GB, so:

4700 Mbyte q8 s(4.692 Mbit/sec q60 second ) = 133.5 minutes

Therefore, one side of a disc can record about 133 minutes.

TKey of High Image Quality

Thanks to MPEG2, the digital image compression technology, you can enjoy a DVD-Video movie which features the same image quality as that of

a film shown in a theater. MPEG2 is the technology that superseded the MPEG1, which is employed in video CDs. MPEG2 technology produces a

higher level of image quality.

DVD Video-CD

Video compression MPEG2 MPEG1

Number of pixels (NTSC) 720 q 480 352 q 240

Number of pixels (PAL) 720 q 576 352 q 288

Holizontal resolution more than 500 lines 240 lines

Cording bit rate variable / constant constant

Frame rate 30 frame / sec 30 frame / sec

(60 field / sec) –––

Max. data transfer late 10.08 Mbit / s 1.15 Mbit / s

Average date transfer rate 3.5 Mbit / s 1.15 Mbit / s

Playback time 133 min. (1 layer / 1 sided) 74 minutes

480 min. (2 layer / 2 sided) –––

subtitles 32 subtitles –––

other multi aspect ratio –––

For example, below is one of the actually bit rate of DVD.

SL-DV100

TPrinciple of MPEG2

1. Reads and records the basic screen image from the original image.

2. Compares the read screen image with the next screen image, and records only

the information about the changed parts and hou much and which direction are

changed.

3. As needed, estimates and records the changing information (data) rather than

the changed information.

4. Play backs the basic screen image and the image made from the changed data

with inserting the image made from the estimated changing data.

With this process, a highly precise and smooth-moving image can be played

back.

TPrinciple of Run Length Compression

To reduce the volume of information, the sub-video image such as superimposition is processed using a

compression method called run length coding.

When a letter is expressed using the digital signal with one pixel each (blank areas where there is no

letter are expressed as "0" and shaded areas where there is a letter are expressed as "1"), there is a

series of "0"s and "1"s which is repeated as shown below. In such cases, it is possible to code how many

"0"s follow and "1"s follow, and thereby reduce the volume of information.

Blank areas where there is no letter are expressed as "0" and shaded areas where there is a letter as "1".

Data between a - a' 00000000111100000000

Data between b - b' 00000011100011100000

Data between c - c' 00001111111111110000

Basic screen image

Time passes

Basic screen image

Changed section

Estimation based on

the changed section

Playback image

Basic screen image Screen image made

based on estimations Screen image made

based on changed section

SL-DV100

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