DVDZoran3696-VADIS9.pdf

Zoran Solution DVD

Service Manual

TABLE OF CONTENTS

1 Terminology and Abbreviations ………………………………………………………. 1-5

2 Safety Precautions ……………………………………………………………………... 6-9

3 Electrical Performance Standards …………………………………………………….. 10

4 DVD Box Block Diagram …………………………………………………………..…… 11

5 General Classtication of Symptoms ………………………………………………... 12-16

6 Software Update Method ………………………………………………………..…… 17

7 Repair of Power Board ………………………………………………………….. … 18-22

8 Repair of Decoder Board …………………………………………………………... 23-34

9 Repair of Key Board ………………………………………………………..……… 35

10 Package diagram …………………………………………………………...……. 36

11 System decomposition 3-D diagram ………………………………………...…… 37

12 Main point waveforms of Electronic components ………………………….…… 38

Terminology & Abbreviations

AC-3 The former name of the Dolby Digital audio-coding system . AC-3 followed AC-1

and AC-2. Still used in some standards documents.

Angle In DVD-video, a specific view of a scene, usually recorded from a certain camera

angle. Different angles can be chosen while viewing the scene.

CD Short for compact disc, an optical disc storage format developed by Philips and Sony.

CD-DA Compact disc digital audio. The original music CD format, storing audio

information as digital PCM data. Defined by the Red Book standard.

CD+G Compact disc plus graphics. A variation of CD which embeds graphical data in with

the audio data, allowing video pictures to be displayed periodically as music is

played. Primarily used for karaoke.

CD-R An extension of the CD format allowing data to be recorded once on a disc by using

dye-sublimation technology. Defined by the Orange Book standard.

Channel A part of an audio track. Typically there is one channel allocated for each

loudspeaker.

Chapter In DVD-Video, a division of a title. Technically called a part of title (PTT).

Closed Caption Text captions for video which are not normally visible, as opposed to open

captions, which are a permanent part of the picture. In the United States, the official

NTSC Closed Caption standard requires that all TVs larger than 13 inches include

circuitry to decode and display caption information stored on line 21 of the video

signal. DVD-Video can provide closed caption data, but the subpicture format is

preferred for its versatility.

Component Video A video system containing three separate color component signals,

either red/green/blue (RGB) or chroma/color difference (YGbCr, YPbPr, YUV), in

analog or digital form. The MPEG-2 encoding system used by DVD is based on

color-difference component digital video. Very few televisions have component

video inputs.

Composite Video An analog video signal in which the luma and chroma components are

combined (by frequency multiplexing), along with sync and burst. Also called CVBS.

Most televisions and VCRs have composite video connectors, which are usually

colored yellow.

CD-i Compact disc interactive. An extension of the CD format designed around a set-top

computer that connects to a TV to provide interactive home entertainment, including

digital audio and video, video games, and software applications. Defined by the Green

Book standard. CD-i Assn.

Terminology & Abbreviations

Dolby Digital A perceptual coding system for audio, developed by Dolby Laboratories and

accepted as an international standard. Dolby Digital is the most common means of

encoding audio for DVD-Video and is the mandatory audio compression system for

525/60 (NTSC) discs.

Dolby Surround The standard for matrix encoding surround-sound channels in a stereo

signal by applying a set of defined mathematical functions when combining center and

surround channels with left and right channels. The center and surround channels can

then be extracted by a decoder such as a Dolby Pro Logic circuit which applies the

inverse of the mathematical functions. A Dolby Surround decoder extracts surround

channels, while a Dolby Pro Logic decoder uses tially independent of the recording or

transmission format. Both Dolby Digital and MPEG audio compression systems are

compatible with Dolby Surround audio.

DTS Digital Theater Sound. A perceptual audio-coding system developed for theaters. A

competitor to Dolby Digital and an optional audio track format for DVD-Video.

DVCD Stands for Double Video CD -- pretty popular format in mainland China.

Format itself is nothing new really, its just a regular VideoCD overburned to include 90

to 99mins per CD, compared to regular 74mins per CD in standard VideoCD format.

DVD An acronym that officially stands for nothing, but is often expanded as Digital Video

Disc or Digital Versatile Disc. The audio/video/data storage system based on 12-and

8-cm optical discs.

DVD+R DVD+Recordable defines a standard for recordable DVD drives and media defined

by the DVDRW Alliance. Often called "plus R", the format is write once (compared to

DVD+RW wich can be erased and rewritten). The single sided discs can hold

4,700,000,000 bytes (4.38 Gigabytes at 1024 bytes to the kilobyte) with double sided

discs holding twice as much. There are no dual layer single sided recordable discs. This

format competes with the DVD Forum DVD-R specification. DVDRhelp DVDR

information

JPEG Joint Photographic Experts Group. The international committee which created its

namesake standard for compressing still images.

Karaoke Literally empty orchestra. The social sensation from Japan where sufficiently

inebriated people embarrass themselves in public by singing along to a music track.

Karaoke was largely responsible for the success of laserdisc in Japan, thus supporting

it elsewhere.

Kodak Picture CD Kodak Picture CD is a CD that contains your pictures in JPEG

format(.jpg) along with software that lets you view, enhance, share, and print your

pictures from your computer. Some standalone DVD Players supports this format also,

but then only for viewing. This format will also work on DVD Players that supports

"JPEG file viewing" but you may lose some Kodak Picture CD specific features. Kodak

Picture CD.

Macrovision An antitaping process that modifies a signal so that it appears unchanged on

most televisions but is distorted and unwatchable when played back from a videotape

recording. Macrovision takes advantage of characteristics of AGC circuits and burst

decoder circuits in VCRs to interfere with the recording process.

1-1

Terminology & Abbreviations

MP3 MP3 is an acronym for MPEG-1 (or MPEG-2) Layer 3 audio encoding (it is not an

acronym for MPEG3). MP3 is a popular compression format used for audio files on

computers and portable devices.

The compression in MP3 works on the basis of a "psychoacoustic model" which

means that parts of the audio that human ears cannot detect are discarded by the

encoder. Although this is a LOSSY process, it can yield very high quality audio files

are relatively high compression rates. A typical MP3 file encoded at 128 kbit/s (12:1

compression) is near CD quality.

MP3 audio is increasingly being used in video production coupled with various

MPEG-4 video codecs like divx. The audio may be encoded with a constant or

variable bitrate.

Multiangle A DVD-Video program containing multiple angles allowing different views of a

scene to selected during playback.

Multilanguage A DVD-Video program containing sound tracks and subtitle tracks for more

than one language.

RGB Video information in the form of red, green, and blue tristimulus values. The

combination of three values representing the intensity of each of the three colors can

represent the entire range of visible light.

S/N Signal-to-noise ratio. Also called SNR.

SACD Super Audio CD is the next generation of audio disc, offering full-range,

uncompressed digital multi-channel surround sound. SACD can also be backward

compatible using so called hybrid discs with an extra layer that allows them to be

played on conventional CD players but then only with ordinary CD quality. SACD can

be played on SACD Players, DVD Players with SACD support and if using hybrid

discs also CD Players. SACD is currently competing with DVD-Audio as the new

audio defacto standard. Philips SACD information.

Subtitle A textual representation of the spoken audio in a video program. Subtitles are often

used with foreign languages and do not serve the same purpose as captions for the

hearing impaired.

SVCD SVCD stands for 'Super VideoCD'. A SVCD is very similiar to a VCD, it has the

capacity to hold about 35-60 minutes on 74/80 min CDs of very good quality

full-motion MPEG-2 video along with up to 2 stereo audio tracks and also 4 selectable

subtitles. A SVCD can be played on many standalone DVD Players and of course on

all computers with a DVD-ROM or CD-ROM drive with the help of a software based

decoder / player. SVCDHelp.com.

S-video A video interface standard that carries separate luma and chroma signals, usually on

a four-pin mini-DIN connector. Also called Y/C. The quality of s-video is

significantly better than composite video since it does not require a comb filter to

separate the signals, but it’s not quite as good as component video. Most high-end

televisions have s-video inputs. S-video is often erroneously called S-VHS.

System menu The main menu of a DVD-Video disc, from which titles are selected. Also

called the title selection menu or disc menu

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