DAC DV-700-S Service manual

Service Manual

MODEL: DV-700S

CONTENTS

SPECIFICATIONS.............................................................................................2

ADVANTAGES OF THIS PRODUCT......................................................................3

CIRCUIT OPERATIONAL DESCRIPTION................................................................4

VOLTAGE CHARTS.........................................................................................17

CIRCUIT DIAGRAM........................................................................................18

PCB CIRCUIT BOARD.....................................................................................27

INSTRUMENT DISASSEMBLY...........................................................................31

PARTSLIST..............................................................................................35

! Caution :

In this Manual, some parts can be changed for improving.

1

SPECIFICATIONS

DVD Audio output standards

Output

DVD

Analogue Audio output

Digital Audio output

48/96KHz sampling

48KHz sampling 44.1KHz sampling

2

Disc type

VIDEO-CD

44.1KHz sampling 44.1KHz sampling

44.1KHz sampling

CD

ADVANTAGES OF THIS PRODUCT

· DVD,VCD,CD,CD-R,CD-RW,MP3,PIC-CD,CD+G playback function

· Integrated remote control

· Multiplex sound playback

· Mp3 file playback function

· GUI (Graphical User Interface) OSD (On Screen Display)

By using the [DISPLAY] button on the remote control, information on the
DVD/VCD/CD player and disc, can be displayed on the TV screen.

· Screensaver function (DVD)

· 3D sound (3D sound effect using 2 speakers)

· Coaxial digital output (PCM, Dolby Digital, DTS)

You can enjoy high-level digital audio by connecting with amp embedded with Dolby
Digital / DTS decoder.

· Built-in Dolby Digital decoder

· Analog audio 2-channels output for DOWNMIX (x1)

· Composite video out (x1)

· Slow Forward / Reverse (DVD) playback

· Fast Forward / Reverse playback

· Search of title, chapter, and time in DVD disc, and search of track and time in VCD and CD

· Repeat playback (title and chapter for DVD, track and disc for VCD/CD)

· Repeat a defined period from A to B (DVD)

· Selective Play (DVD/VCD/CD)

You can select and play the desired title / chapter of DVD and track of Video CD

· Various languages OSD (On Screen Display) function (DVD)

You can select and display OSD among various languages. (English, French, Spanish)

· Parental Lock function (DVD)

This function can prevent playback of software that may be unsuitable for children.

· Multi Audio function (DVD)

The audio soundtrack can be heard in up to 8 languages. In the case of SVCD or
VCD, it depends on the disc. (The number of audio languages depends on the
software.)

· Multi Subtitle function (DVD)

The subtitle can be seen in up to 32 languages. In the case of SVCD or CVD, it
depends on the disc. (The number of subtitle languages depends on the software.)

· Multi Angle function (DVD)

This function allows you to choose the viewing angle of scenes which were shot
from a number of different angles. (The number of angles depends on the software.)

· Screen zoom function (DVD/VCD)

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CIRCUIT OPERATIONAL DESCRIPTION

DVD Module

1.Summary

DVD One Board consists of: Loader part that reads and transmits audio
and video data saved at Optic Discs (DVD, CD-DA, VCD, CD-R) to MPEG
Decoder part; MPEG Decoder part, which, by decoding and encoding data
received from the Loader, produces analog signals; and u-Com that
controls the overall system including the loader and MPEG decoder.

2.How Does it Operate

Insert the power cord and then power transmitted to each IC, and the SET will be the
STANDBY status which requires the least power for input the front panel key, input
the STAND BY/ON key, extinguished the LED. Once the Power On key is entered, u­Com recognizes it and initiates each chipset, performs sequential algorithms such as
determining whether the disc is in or not, and if in, what type of disc is loaded.
Through this process, it can read disc data before transmitting it to the MPEG
Decoder. The MPEG Decoder will then decode and encode such data before
generating the final analog audio and video signal outputs.

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CIRCUIT OPERATIONAL DESCRIPTION

3.Loader Part

The loader which read the data of audio/video from optic disc and transfer them to
MPEG decoder can be divided into Deck total DVD assay(in a short term, Mecha) and
Servo. Mecha mounts with the optical pick-up which allows reading the signal of a
disc using laser beam and makes it operates and consists of the deck mechanism
which allows loading a disc and reading the data. Servo is a sort of circuit which
allows operating the loader and recovering the data and consists of Motor Drive IC
operating the spindle, the sled, the loading motor.

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CIRCUIT OPERATIONAL DESCRIPTION

1) Motor Drive IC: AT5868S

The AT5868S is a 5-channel BTL driver IC for driving the motors and actuators in
products such as CD-ROM/DVD-ROM/DVD-Player drives. Two of the channels use current
feedback to minimize the current phase shift caused by the influence of load inductance.

Driver IC generates the focus signal and the tracking signal for pick-up actuator, the
sled signal for feed, spindle signal and the load signal for opening and closing of the
tray. The focus signal, the tracking signal, the sled signal and the spindle signal are
input into each relaxant port of the drive IC(in the order of No. 26 pin, 23, 4, and 1)
and set the gain amplification and the center voltage through the internal OP-AMP
and drive on both sides and then the focus signal and the tracking signal will be
output as VOFC+, VOFC- and VOTK+, VOTK- on actuator, the sled signal and the
spindle signal will be output as VOSL+, VOSL- and VOLD+, VOLD- on each motor. For
the load signal the input opening/closing signal is output as VOTR+, VOTR- through
the loading PRE FWD REV circuit.

Motor Drive IC (AT5868S) Block Diagram

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CIRCUIT OPERATIONAL DESCRIPTION

MPEG Decoder

The signal read from DVD disc is output into the RF signal and Servo related signal
through the RF IC and they are input into the MPEG decoder and processed the MPEG
decoding and divided into video/audio signal. The video signal is output into the analog
audio signal through the built-in encoder block and also the audio signal into the audio
DAC through the audio decoder block.

MPEG decoder consists of existing MPEG-2 decoder and single chip combined the digital
signal processing part which is the core technology of DVD player with the Servo
controller.

1. DVD Servo And MPEG-2/MPEG-4/DIVX Decoder : ES6698

The ES6698 Vibratto™II processor is a highly integrated single-chip DVD solution
that integrates read channel, ECC, Servo DSP, MCU, and MPEG-2/MPEG-4/DivX
decoder that has a state-of-the-art 480p/576p progressive-scan video feature to
provide brilliant and sharp, flicker-free video output to the display, and with built-in
gamma correction and S/PDIF input and output support. The ES6698 performs
audio/video stream data processing, TV encoding, Macrovision™ copy protection,
DVD system navigation, system control, and housekeeping functions.

The Vibratto-II DVD processor is built on the ESS proprietary dual CPU Programmable
Multimedia Processor(PMP) core consisting of 32-bit RISC and 64-bit DSP processors
and offers the best DVD feature set. The processing units enable simultaneous
parallel execution of system commands and data processing to perform specialized
enconding and decoding tasks.

The RISC processor performs bit stream parsing, control audio data output, transfer
video and audio data to the vector engine and service system control and
housekeeping functions. The vector engine performs audio and video micro-code
processing required by A/V standards, such as Dolby Digital®, MPEG and JPEG
imaging. These processing tasks include video motion compensation and estimation,
loop filtering, Discrete Cosine Transforms(DCT), inverse DCT, quantization, and
inverse quantization.

The Vibratto-II DVD processor supports all popular pick-up units, industry standard
I²S audio data input and output, EPROM and DRAM access. It also supports both
letterbox and pa n-and-scan displays , s ub- picture overlay, and On-Screen
Display(OSD).

The Vibratto-II’s Unified Memory Architecture enables the lowest possible system
memory cost by consolidating multiple memory subsystems into a single unit.

In addition, the Vibratto-II DVD solution offers support for Karaoke CD+G, DVD­Aduio, HDCD, CD-DA, Mp3, and WMA.

The ES6698 Vibratto-II DVD processor with DTS support is offered with the
ES6698D, which has the same pinout as the standard ES6698. DTS support is
provided via software and only works with the ES6698 and ES6698D DVD processors
are available in 2 208-pin Plastic Quad Flat Pack(PQFP) device package.

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CIRCUIT OPERATIONAL DESCRIPTION

ES6698 Vibratto-II system Block Diagram

ES6698 Vibratto-II Block Diagram

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CIRCUIT OPERATIONAL DESCRIPTION

2. DVD Servo AFE IC : ES6603

The ES6603 is a high-performance, single-chip analog front-end (AFE) device that
contains the servo functions, RF attenuator, automatic gain controller (AGC), and
programmable equalizer/filter for a DVD player system, and dual auto laser power
control circuit to support twin pickups or twin laser systems.

The ES6603 incorporates a bi-directional serial port for accessing the programmable
functions of the internal AGC, including attenuation and boost/equalization.

The DVD servo block of the ES6603 includes mirror detection, defect detection, dual
auto laser power control, focus error, center error, and tracking error detection
circuits. The ES6603 provides AC-coupled voltage inputs for photo detector signals
used to detect center error, focusing error, tracking error, and differential phase
tracking error detection for DVD.

The ES6603 also provides an AC-coupled differential or single-ended RF signal input
to the programmable attenuator with external AC coupling circuitry, and an AC­coupled single-ended input for RF signals. The attenuator outputs are AC-coupled to
the AGC inputs. The AC-coupled DVD and CD inputs are multiplexed in the input
stage for accurate error detection.

The programmable bandwidth and boost/equalization of the ES6603 is provided by
internal 7-bit control DACs, while a variable attenuator is used to program the zero
locations. The programmable bandwidth and cutoff range are set by the filter cutoff
DAC. Signal equalization with theprogrammable filter is supported with a wide
bandwidth fullwave rectifier and a dual rate charge pump.

The ES6603 also provides inputs for its internal RF summing mode. These inputs
have the gain control amplifiers at the input stage. The gain is controlled by the
register bit settings of the serial port.

The ES6603 is available in an industry-standard 64-pin low-profile quad flat pack
(LQFP) package.

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CIRCUIT OPERATIONAL DESCRIPTION

DVD Servo AFE IC : ES6603 Block Diagram

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CIRCUIT OPERATIONAL DESCRIPTION

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CIRCUIT OPERATIONAL DESCRIPTION

3. Flash Memory : A29800UV-70(A29800TV-70/AT49F8192AT/HY29F800ABT-70)

This stores every program required for the operation of DVD player and holds the
data of OSD languages and LOGO and send them upon request from u-COM. This
allows the update of firmware by CD-R/RW. For DVD module.

Description

The A29800UV-70 is a 5.0 volt only Flash memory organized as 1048,576 bytes
of 8 bits or 524,288 words of 16 bits each. The A29800UV-70 offers the RESET
function. The 1024 Kbytes of data are further divided into nineteen sectors for
flexible sector erase capability. The 8 bits of data appear on I/O0- I/O7 while the
addresses are input on A1 to A18; the 16 bits of data appear on I/O0~I/O15. . The
A29800UV-70 is offered in 44-pin SOP and 48-Pin TSOP packages. This device is
designed to be programmed in-system with the standard system 5.0 volt VCC
supply. Additional 12.0 volt VPP is not required for in-system write or erase
operations. However, the A29800UV-70 can also be programmed in standard
EPROM programmers.

A29800UV-70 Block Diagram

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CIRCUIT OPERATIONAL DESCRIPTION

4. EEPROM : S524C20D21(HT24LC02)

This stores the information related to setup of DVD menus. This can read and write
the optional information such as OSD, voice, language option after function for
subtitle etc, the aspect or method of TV display, video option like display function
and audio, screen saver, parental function through the I²C transmission method.

Description

The S524C20D21serial EEPROM has a 2,048-bit (256 byte) capacity, supporting
the standard I²C™-bus serial interface. It is fabricated using Samsung most
advanced CMOS technology. One of its major feature is a hardware-based write
protection circuit for the entire memory area. Hardware-based write protection is
controlled by the state of the write-protect (WP) pin. Using one-page write
mode, you can load up to 16 bytes of data into the EEPROM in a single write
operation. Another significant feature of the S524C20D21is its support for fast
mode and standard mode.

S524C20D21 Block Diagram

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CIRCUIT OPERATIONAL DESCRIPTION

5. SDROM : HY57V641620HGT-H(HY57V641620HGT-55)

This sends and receives data with MPEG decoder and performs the video signal
processing. Every video signal output from DVD player is once stored in SDRAM and
then encoded in MPEG decoder and finally output into the analog signal.

SDRAM applied to DVD module has the capacity of 64MBit(1048576 x 16bit x
4Bank), sends and receives data with MPEG decoder by 16 bit.

Description

The Hynix HY57V641620HGT-H is a 67,108,864-bit CMOS Synchronous DRAM,
ideally suited for the main memory applications which require large memory
density and high bandwidth. HY57V641620HGT-H is organized as 4banks of
1,048,576x16.

HY57V641620HGT-H is offering fully synchronous operation referenced to a
positive edge of the clock. All inputs and outputs are synchro-nized with the
rising edge of the clock input. The data paths are internally pipelined to achieve
very high bandwidth. All input and output voltage levels are compatible with
LVTTL.

Programmable options include the length of pipeline (Read latency of 2 or 3), the
number of consecutive read or write cycles initiated by a single control command
(Burst length of 1,2,4,8 or Full page), and the burst count sequence(sequential or
interleave). A burst of read or write cycles in progress can be terminated by a
burst terminate command or can be interrupted and replaced by a new burst
read or write command on any cycle. (This pipelined design is not restricted by a
`2N` rule.)

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