mid semester seminar on 6months industrial training

8/7/2019 MID SEMESTER SEMINAR ON 6MONTHS INDUSTRIAL TRAINING

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A TD I X ON T E C HNOL OG I E S ( I ND I A ) PV T L T D

S E L A Q U I , D E H R A D U N

PREPARED BY:RA TIKA CHA WLA

E C E ( B )

7840408444

MID SEMESTER SEMINAR ON

6MONTHS INDUSTRIALTRAINING



ABOUT THE COMPANY

y Company Name: Dixon Technologies Pvt. Ltd.

y Business Type: Manufactures

y Product/Service: DVD ,CTV ,LCD , Washing

machines.

y Management Certification: ISO 9001-2000 and ISO

14001-2004.

y

Contract Manufacturing : OEM(Original EquipmentManufacturers) service offered , ODM(Order Design

Manufacturing)service offered



Departments I worked in

y PQC(Production Quality Control)

y IQC(Incoming Quality Control)

y ELT(Early Life Time)

y QA(Quality Assessment) OQA Level-1 (CAT)

OQA Level-2 (Dismantle)



Process of PHILIPS DVD

y Kitting Stage

y Front Panel Assembly

y Front panel fitting

y PSU(Power Supply Unit) Fitting

y PSU Mounting

y FPCB(Front Printed Ckt Board) & PSU fitting

y Loader Mounting(Critical Process)y Loader Fitting

y Back Plate Fitting



�Mono PCB fitting�Connector fitting

�Mains cord fitting�Family Label-1�Family Label-2

�

Connector Fitting(Critical Process)�Top fitting-1

�Top fitting-2

�Top fitting-3

�HT (High Tension)Testing [3 KV,5mA for 5 sec]�Music-1(Tray , door , open/close , version check)



�Music-2(Commercial

VCD,Mute,picture and audio quality)

�Music-3(DVD 111,Sound 5.1,graphcheck on CRO)

�Music-4(JPEG)

�

Music-5(USB, Default set)�Packing Stage



CD(Compact Disc)CD(Compact Disc) DVD(Digital Versatile Disc)DVD(Digital Versatile Disc)

y CD is an optical medium that

can store digital data.y Resolution of 352*288

y Video Compression- MPEG 1

y

Video bitrate of 1.15 mbpsy Audio bitrate 224 kbps

y DVD is still an optical mediamuch like the CD but withmuch greater capacities,starting at 4.7GB at the low endto as high as 17GB.

y Resolution of 720*576

y Video Compression- MPEG 2

y Video bitrate of ~5mbpsy Audio bitrate of ~448 kbps

Difference between a CD and a DVD



y Quality- Good

y Length of pits and flatsmax-0.83µm

min-3.054µm

y Quality-Excellent

y Length of pits and flatsmax-0.4µm

min-2.13µm



Dimensions and Layout

CD



DVD PLAYER-Parts



Various parts of the before seen DVD are

y PSU (Power Supply Unit)

y MPEG (Moving Picture Experts Group)

y Loader/OPU(Optical Pickup Unit)

y FPCB (Front Printed Ckt. Board)y USB port

y Connectors

y Mains Cord

y Top

y Bottom

y Front/back panel



PSU(Power Supply Unit)

y 220V AC from the mains cord is passed to primary

winding of the transformer.

y It is a step down transformer and converts it into a 12V

AC.y This 12V AC is further given to a 4-diode bridge rectifier.

y Finally 12V,-12V,5V,12V,0V,0V are sent to the MPEG via

a 6 pin connector.

y +12V for IC1389,-12V for sound IC and +5 V Disc

operation.



MPEG

y Main component of a DVD player.y It contains three IC¶s ±

MT 1389- Main IC

SW 5888- Motor Driver IC

W 9468 - EPROM

y It is connected to the PSU via a 6 pin connector.

y A 24 pin FFC(Fast Forward Connector) connects the MPEG to motor of the loader. It has 4 pins that contains 3V each and that makes a total of 12V which drives the motor of OPU.

y A 6pin connector connects the MPEG to FPCB which needs a supply of

+5V for the LED display.y Another connector giving a supply of +3V for the door to open and close.

And another connector for its motor.



Loader-Optical Reading



FPCB

y It has a 30pin IC that controls the display, the sensor, USB.

y It is connected via a connector.

y The connector supplies 5V,5V,3V,0V,0V which goes tovarious places like the display working of USB etc.



Various Faults

y Dead

y No disc DVD

y No disc VCD

y Remote no work

y No read VCD/DVD

y Coaxial no sound

y Centre no soundy Subwoofer no sound

y Hang



y Disc spinning

y Switch no work

y USB no read

y LED permanent glow

y Display cut



MPEG Technologies

y MPEG-1 - slightly better than VHS quality

- movies compressed to be put in CD-ROMs (700 Mb)- used in VCD, CD-I, etc.

y MPEG-2 - high quality video (DVD quality)- less compression, which means more data- need large capacity DVD-ROMs for movies (4.7±17 Gb)- only 15 mts of MPEG-2 video can be put in a CD-ROM- used in DVD-video, digital broadcasting, etc.

�y MPEG-4 - a full resolution MPEG-4 movie can be put in a CD-ROM

- high quality at very low bit-rates- ideal for web-video



MPEG 4

� the advanced compression technology enables distribution of contentand services of high-definition quality in low-bandwidth acrossbroadcast, broadband, wireless & packaged media

� a more aggressive compression for multimedia streams that enable

DVD-like movie quality, yet maintaining smaller file size

� can provide MPEG-2 quality picture at 1/11 of it¶s size

� analogue movies can be converted to MPEG-4 format using variouscodec (coding/decoding) systems like DivX, Xvid

� MPEG-4 files can be downloaded from internet to CD-ROMs andplayed back in DVD players which support MPEG-4 playback



MP3

y Stands for µMPEG 1, Audio Layer 3¶

y Revolutionary compression technology by which

large digital audio files can be compressed to almost10 times without radically degrading the quality.

y Popular in Web and PC audio file storage is now getting popular in consumer audio devices too.



DivX

� a collection of ripping tools for video compression and decoder, basedon MPEG-4, developed by DivX Networks. Inc.

� it can shrink huge digital video to sizes small enough to be transportedover the internet, while maintaining high visual quality

� can compress DVD quality video at 10-20 % of original MPEG-2 file size

� DVD quality video from CDs via DVD players with DivX decoder.

� high quality A/V transfers from web, movie-cameras, computers, etc

� what MP3 did to audio, DivX does to video



DivX

� record favourite TV programs (sports, soaps, movies,etc)

� archive VHS recordings in CD-ROMs

� download high quality movies from web- no more noisy, low resolution & stamp sized video

� transfer recordings from the digital movie camera

� DVD movies can be copied on to CDs



Multi-Channel Sound System



Dolby Pro Logic

� A analog surround sound encoding/decodingtechnique by the Dolby laboratories.

� Provides a multi-dimensional surround sound with asource of two channel (left & right channel ).

� Provides 4 channel (Left, Centre, Right, Rear monoleft & right) .

� Dolby pro logic reproduction is possible in stereoaudio tapes & CDs



Dolby Pro Logic II

� A digital surround sound encoding/decoding technique by the Dolby laboratories.

� Provides a multi-dimensional surround sound with a source of two channel

(left & right channel ).

� Provides 5.1 channel (Left, Centre, Right, Rear left , Right surround & Subwoofer) .

� Dolby pro logic II is possible in audio CD & DVDs



Dolby Pro Logic II



TruSurround and Virtual Dolby

REAL SPEAKER

VIRTUAL SPEAKER



Progressive Scan

y The two fields (odd & even line fields) of a frame in aconventional TV picture are displayed together inone frame.

y Results in a razor sharp picture performanceespecially when seen on Large screens.



Progressive Scan

PROGRESSIVE SCAN

�In Progressive Scan, A&B fields arescanned continuously at a time ( single

frame )

�In the end we get a Razor sharp picture



High Definition JPEG

y With High Resolution JPEG playback, you can show up to 2 Megapixel resolution on your Flat TV (FTV).Now you can view your digital pictures in their true

resolution, without loss of quality or details.y Rather than downscaling the image to Standard

Definition resolution (SD, 0.4 Megapixel) andupscaling it to HD (1080i, 2 Megapixel), the

resolution is maintained throughout the chain at 2Megapixel. This ensures no loss of quality or details.



High-Speed USB 2.0 Link

The Universal Serial Bus or USB isa protocol standard that isconveniently used to link PCs,peripherals and consumer

electronic equipment. Hi-SpeedUSB devices have a data transferrate of up to 480 Mbps - up fromthe 12 Mbps in original USB ones.With Hi-Speed USB 2.0 Link, allyou have to do is plug in your USB

device, select the movie, music orphoto and play away.



HDMI

HDMI (High-Definition MultimediaInterface) is a compact audio/videointerface for transmitting

uncompressed digital data.

� High quality digital video

� High quality digital audio

� Control connectivity



THANK YOU

mid semester seminar on 6months industrial training

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