Samsung DVDHR-721 Service manual

Introducing Samsung DVD Recorder

( DVD-HR721)

Samsung Electronics Co. LTD

Digital Video Division

What is SEC’s DVD-HR721?

Digital A/V system for video playing & recording

using optical disc as the medium format

High-quality Recording

Optical Medium and HDD

Recording

Digital recording by an optical

High picture and sound quality

medium and HDD format allows

recording capability comparing

random access capability and easy

with analog medium recording

& convenient recording

systems

Samsung HDD-DVD Recorder

 General Introduction

❏

Model No : DVD-HR721

 Characteristics

1. Super picture & sound quality recording with MPEG-2(VBR) on DVD-RAM,

compatible with A/V & PC

2. Convenient control through random accessibility of optical discs & HDD disc

- One touch recording : Automatic empty area recording

- High Speed Search and Play

3. Qui ck dubbi ng : Wi t h t he qui ck dubbi ng f unct i on, dat a t r ans f er f r om

HDD t o DVD Di s c i s f as t er t han ever

4. Advanced playback functions for multiple purposes

(Compatible with DVD, Audio-CD, CD-R/RW(MP-3,MPEG4), DVD-R, DVD-RW,DVD-RAM HDD Disc)

DVD-HR721 Playback & other Features

■ Progressive Scan

By scanning all 576 lines(PAL) in one pass, progressive scanning provides high vertical resolution and flicker-free, high-density image output that does not suffer from the loss of quality during subject movement -- which is characteristic of the conventional interlaced scanning method.

■ Program Navigator

50 Frame/Sec25 Frame/Sec

Recorded programs are shown as thumbnail pictures, and information such as title, recording dates and times are displayed on menu screen. User can choose a desired program.

■ Editing

Simple non-linear editing is possible on menu screen without additional editing system. User can delete part of a program or entire program, and edit program title.

Assembly

DVD-HR721 consists of Deck, Main PCB, Jack PCB, SMPS PCB, HDD, Top, Bottom, Panel Ass’y.

M ain P CB

Jack P C B

P ane l

A s s 'y

D eck A ss 'y

T op

M ain P CB

B otto m

A s s'y

Di s as s embl y and Reas s embl y pr oces s

Adobe Acrobat

¹®¼

Supplide Accessary

: DVD-HR721 supply below accessary

Specifications

6. 7 Wat t t s ( st and by ) , 31 Wat t t s ( s t and by on) , 45 Wat t t s ( Rec & Pl ay s i mul t aneus l y)

4. 2 Kg

430mm( W) × 255mm( D) × 79mm( H)

PAL B/ G, I , D/ K SECAM L/ L’

DVD-HR721 Key Features

 Recording Features

■ MPEG-2 VBR(Variable Bit Rate) Recording

■ Creating a DVD video title using DVD-RW/DVD-R

■ One-Touch Recording

■ Automated Quality Adjustment for Timer Recording

■ Copying data from a digital camcorder using a DV input jack

■ Selectable Recording Mode

 Playing Features

■ Progressive Scan

■ Program Navigation

 Other Features

■ Easy Editing

■ Aut o Chapt er i ng

1. Overall block diagram

2. Wiring diagram

2. DOMINO H/W

I nt er f ace

■ HOST Interface

■ Per i pher al / St or ag e

I nt er f ac e

■ ATAPI Cont r ol l er

( Mas t er : HDD, Sl ave :

ODD)

■ I EEE 1394 I nt er f ac e

■ Vi deo I nt er f ace

DMN8652

■ Audi o I nt er f ace

■ SDRAM I nt er f ac e

■ Ser i al I / O I nt er f ace

■ UART I nt er f ace

3. Front-Micom I nt er f ace

•

Front- Micom UD78F4928GF(FIC1, NEC) is used to control Power, LED Module, MTS Block, VPS/PDC, KEY Input Matrix etc.

•

The SPI (Serial Peripheral Interface) port provides a bus for a serial interface with AV- CODEC DMN8652(DIC1)

4. Vi deo I nput I nt er f ace

•

DVD- HR720 has the one RCA Video input and two SCART Jack.

•

1 RGB Input, 1 CVBS in Scart jack

•

1 RCA input in Front Panel .

•

The analog Video signal be selected Line 1 or Line 2 by the FIC1 (Front Micom:Control part) and IC201(MUX IC;Switching part).

•

TIC1 (Video Decoder) diverges from the 14.318185MHz crystal, then generates ITU- R656 (10bits) and 27MHz clock.

•

TIC1 (Video Decoder) does closed caption, copy guard detect processing and A/D conversion of analog Video signal converted into 10bit Digital Video signal (ITU- R656 Format) is outputted via DIC1 (MPEG2 Decoder & Encoder with video Encoder:DMN8602) of digital part.

5. Anal og MUX( BU4052)



IC201 is analog MUX. As Pin 9, 10 of the IC201 are controlled by the Front Micom, IC201 select Line1 of CVBS[Pin14], Line2 of CVBS[Pin 15] and RF signal.



The analog Video Signal of IC201 & IC202 output is selected by the FIC1 via TIC1(Video Decoder : TVP5146) of analog Video input parts.

6. NTSC/ PAL Vi deo DECODER



Video DECODER TVP5146 (TIC1) is a high quality NTSC, PAL, and SECAM video decoder plus YPbPr component inputs designed for multimedia applications.



This TIC1 (Video Decoder) includes three 10- bit high speed ADCs.converters. and A/D conversion of 10bit analog Video signal converted into Digital Video signal (ITU- R656 Format) is outputted via



On CVBS and S- video inputs, the user can control video characteristics such as contrast, Brightness, saturation, and hue via an I2C DIC1 port interface.



A built- in versatile VBI slicer and VBI data passthrough capability support common data services.

7. Vi deo Out put I nt er f ace



DIC1 inputted from pin E1 with 13.5MHz generates HSYNC and VSYNC which are based on video signal. DIC1 is synchronous signals with decoded video signal. DIC1 does RGB encoding, copy guard processing and D/A conversion of 10bit Video signal converted into analog signal is outputted via amplifer of analog part.



The above signals, which are CVBS (Composite Video Burst Synchronized), Y(S_Video), C(S_Video),



Y(Component)/G(Green), Cr(component)/ R(Red), Cb(component)/B(Blue), are selectively outputted 576i(interlaced Video Output), 576P(progressive Video Output) by the front switch. DiC1 adopts 10bit D/A converter.



DIC1 perform video en- coding as well as copy protection.

8. NTSC/ PAL Di gi t al encoder



The NTSC/PAL digital video encoder (DENC) module converts a digital video data stream into NTSC or PAL composite or component video output.



The digital input format includes 8- bit (interleaved) or 16- bit YCbCr 4:2:2 video.



The DMN- 8652 DENC output can be in one of the following formats:

- .Baseband composite (M) NTSC or (B,D,G,H,I) PAL analog video.

- .Separate analog Y/C outputs to support S- video.

- .Separate analog component video RGB or SMPTE YPbPr outputs.

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