Daewoo DG-K512 Manual de usuario

Service Manual

MODEL: DG-K512

DG-K514

DG-K515

DG-K518

✔ Caution :

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

performance without notice in the parts list. So, if you need the latest

parts information,please refer to PPL(Parts Price List) in Service

Information Center.

December. 2005

DVD PLAYER

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CONTENTS

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

CIRCUIT OPERATIONAL DESCRIPTION.........................................................................................3

VOLTAGE CHARTS.....................................................................................................................12

CIRCUIT DIAGRAM...................................................................................................................13

PCB CIRCUIT BOARD.................................................................................................................22

WAVEFORMS............................................................................................................................32

TROUBLE SHOOTING.................................................................................................................37

INSTRUMENT DISASSEMBLY......................................................................................................42

PARTLIST...................................................................................................................................49

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Laser wavelength 650nm

Video PAL/AUTO/NTSC

Frequency response 20Hz ~ 20KHz (±1dB)

Signal/noise ratio ≥90dB

Channel separation ≥85dB ( 1KHz)

Dynamic range ≥80dB ( 1KHz)

Output

Audio

Analog output level : 2.0 + 0/-0.2Vrms

(Load impedance : 1,0KΩ)

Digital output level : 0.5 ±0.1Vp-p

(Load impedance : 75Ω)

Output

Video

Composite output level : 1.0 ±0.1Vp-p

(Load impedance : 75Ω, imbalance, negative polarity)

S-video

output level : brightness(Luma) 1.0 ±0.1Vp-p Chromaticity (Color)

0.286 ±20%

(Load impedance : 75Ω)

Component Y: 1Vp-p, Pb/Pr: 0.7Vp-p (Load impedance : 75Ω)

Power 100-240V~, 50Hz~60Hz 12W

Dimensiones Body (W x H x D) 430 x 38 x 245 mm

Packing 510 x 88 x 305 mm

Weight (Gross / Net) 2.9Kg / 2.2Kg

Notes : Design and speciﬁcations in this instruction manual are subjected to change with-

out prior notice toimprove quality and function.

DVD Audio output standards

Output Disc type

DVD VIDEO-CD CD

Analogue Audio output 48/96KHz sampling 44.1KHz sampling 44.1KHz sampling

Digital Audio output 48KHz sampling 44.1KHz sampling 44.1KHz sampling

SPECIFICATIONS

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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 STAND-

BY 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, u-Com 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.

DVD-MODULE Block Diagram

CIRCUIT OPERATIONAL DESCRIPTION

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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.

Loader Block Diagram

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CIRCUIT OPERATIONAL DESCRIPTION

1) Motor Drive IC: AT5888S

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 gener-

ates 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 sig-

nal 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 (AT5888S) Block Diagram

Actuator

Driver(6x)

MUTE

Actuator

Driver(6x)

Spindle

Driver(4X)

Sled

Driver(4X)

Thermal

Shut down

10K

25K

GND

Vcc2

28 27 26 25 24 23 22 21 20 19 18 17 16 15

8 9 10 11 12 13 141 2 3 4 5 6 7

PGND

25K

10K

Vcc1

PGND

Vcc2

Vcc1

Pre-DRV TRAY

DRIVER

VCTL

FWD REV

TRB_2 NC NC

REGO2TRB_1 REGO1 VOTR- VOTR+ VOSL+ VOSL- VOFC- VOFC+

VOLD- VOLD+ VOTK- VOTK+

VINSL+VINFC

MUTE BIAS VINTK VINLD GND VCC2

VCC1

10K

25K

15K

10K

CIRCUIT OPERATIONAL DESCRIPTION

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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 sig-

nal processing part which is the core technology of DVD player with the Servo controller.

1) DVD Servo And MPEG-2 Decoder : MT1389D

MediaTek MT1389 is a DVD player system-on-chip (SOC) which incorporates advanced

features like high quality TV encoder and state-of-art de-interlace processing. The

MT1389 enables consumer electronics manufacturers to build high quality, cost-effec-

tive DVD players, portable DVD players or any other home entertainment audio/video

devices.

Based on MediaTek’s world-leading DVD player SOC architecture, the MT1389 is the

3rd generation of the DVD player SOC. It integrates the MediaTek 2nd generation

front-end analog RF ampliﬁer and the Servo/MPEG AV decoder.

The progressive scan of the MT1389D utilized advanced motion-adaptive de-interlace

algorithm to achieve the best movie/video playback. It also supports a 3:2 pull down

algorithm to give the best ﬁlm effect. The 108MHz/12-bit video DAC provides users a

whole new viewing experience.

DVD Player System Diagram

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CIRCUIT OPERATIONAL DESCRIPTION

MT1389 Functional Block Diagram

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CIRCUIT OPERATIONAL DESCRIPTION

2) Flash Memory : MX29F040QC-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, 8MBit Flash Memory on 512K x 16bit basis is

used.

Description

The MX29F040 is a 4-mega bit Flash memory organizedas 512K bytes of 8 bits. MX-

IC's Flash memories offerthe most cost-effective and reliable read/write non-volatile

random access memory. The MX29F040 is packaged in 32-pin PLCC, TSOP, PDIP. It is

designed to bereprogrammed and erased in system or in standardEPROM programmers.

The standard MX29F040 offers access time as fast as55ns, allowing operation of high-

speed microprocessorswithout wait states. To eliminate bus contention, theMX29F040

has separate chip enable (CE) and outputenable (OE) controls.

MXIC's Flash memories augment EPROM functionalitywith in-circuit electrical erasure

and programming. TheMX29F040 uses a command register to manage thisfunctional-

ity. The command register allows for 100%TTL level control inputs and fixed power

supply levels during erase and programming, while maintaining maxi-mum EPROM

compatibility.

MXIC Flash technology reliably stores memorycontents even after 100,000 erase and

programcycles. The MXIC cell is designed to optimize theerase and program mecha-

nisms. In addition, thecombination of advanced tunnel oxide processingand low in-

ternal electric fields for erase andprogramming operations produces reliable cycling.

The MX29F040 uses a 5.0V±10% VCC supply toperform the High Reliability Erase and

autoProgram/Erase algorithms.

The highest degree of latch-up protection isachieved with MXIC's proprietary non-epi

process.Latch-up protection is proved for stresses up to 100milliamps on address and

data pin from -1V to VCC+ 1V.

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CIRCUIT OPERATIONAL DESCRIPTION

CONTROL

INPUT

LOGIC

PROGRAM/ERASE

HIGH VOLTAGE

WRITE

STATE

MACHINE

(WSM)

STATE

MX29F040

FLASH

ARRAY

ADDRESS

LATCH

AND

BUFFER Y-PASS GATE

EDO

ARRAY

SOURCE

COMMAND

DATA

DECODER

COMMAND

DATA LATCH

I/O BUFFER

PGM

DATA

PROGRAM

DATA LATCH

SENSE

AMPLIFIER

Q0-Q7

A0-A18

FLASH MX29F040QC-70 Block Diagram

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