LG GCE-8240B Bedienungsanleitung

INTRODUCTION

FEATURES

1. General

1) Enhanced IDE interface.

2) Internal 5.25 inch, halfheight CD-R/RW Drive.

3) 8 Mbytes buffer memory.

4) Audio CD like tray loading of a disc without using a caddy.

5) Power loading and power ejecting of a disc. The disc can also be ejected manually.

6) Supports Power saving mode and Sleep mode.

7) Vertical and Horizontal operation.

8) ExacLink Function.

2. Supported disc formats

1) Reads and writes data in each CD-ROM, CD-ROMXA, CD-I FMV, Video CD, and CD-EXTRA

2) Reads data in Photo CD (Single and Multi session).

3) Reads and writes standard CD-DA.

4) Reads and writes CD-R discs conforming to “Orange Book Part 2”.

5) Reads and writes CD-RW discs conforming to “Orange Book Parts 3”.

3. Supported write method

1) Disc at once (DAO), Session at once (SAO), Track at once (TAO), Variable packet, Fixed packet, and

Multi-session.

4. Performance

1) Random 110 ms average access time.

2) CD-R Record speed : 8X, 12X, 16X, 16-24X Z CLV.

3) CD-RW Record speed : 2X, 4X, 10X.

4) CD-ROM : Max 6,000 KB/s(Max 40x) Sustained Transfer rate.

5) Supports real time error correction and real time layered error correction at each speed.

6) PIO Mode 4, Multi DMA Mode 2 .

7) Multimedia MPC-3 Spec compliant.

8) Support CD-TEXT read/write.

5. Audio

1) Output 16 bit digital data over ATA interface.

2) 8 Times Digital Filter for CD Audio

3) Software Volume Control

4) Equipped with audio line output and headphone jack for audio CD playback.

5) Front panel Volume Control for Headphone Output.

This service manual provides a variety of service

information.

It contains the mechanical structure of the CD-

R/RW Drive and the electronic circuits in

schematic form. This CD-R/RW Drive was

manufactured and assembled under our strict

quality control standards and meets or exceeds

industry specifications and standards.

This CD-R/RW drive is an internal drive unit

designed for use with IBM PC, HP Vectra, or

compatible computer. It can write as much as 700

Mbytes of digital data into CD-R/RW disc, and can

read as much as 650 Mbytes of digital data stored

in a CD-ROM, CD-R and CD-RW disc.

This CD-R/RW Drive can easily meet the

upcoming MPC level 3 specification, and its

Enhanced Intelligent Device Electronics (E-IDE)

and ATAPI interface allows Plug and play

integration in the majority of today’s PCs without

the need of an additional interface card.

SPECIFICATIONS

1. SYSTEM REQUIREMENTS

-CPU: IBM Compatible Pentium 350MHZ (or faster)

(For 24X Write speed, 500MHz or faster recommended.)

-64MB Memory or greater

2. SUPPORTING OPERATING SYSTEM

3. GENERAL

1) Host Interface.......................................................................................................................ATAPI compliant

2) Read Function

• Acceptable discs ...............................................................CD-ROM Mode1 (basic format), CD-ROM XA

CD-Audio

Mixed Mode (Audio and Data Combined)

Photo-CD (Single and Multi-Session)

CD-I FMV, Video CD

CD-Plus/CD-Extra,

CD-R (Conforming to “Orange Book Part2”)

CD-RW (Conforming to “Orange Book Part3”)

3) Write function

• Applied Format..................................................................CD-ROM Mode-1

CD-ROM XA

CD-Audio

Mixed Mode (Audio and Data Combined)

Video CD, CD-I FMV

CD-Plus/CD-Extra

• Writing Method..................................................................Disc at once(DAO)

Session at once(SAO)

Track at once(TAO)

Variable packet writing

Fixed packet writing

Multi-session

4) Cache memory (R/W) .........................................................8 Mbyte

5) Disc diameter ......................................................................12 cm /8 cm

6) Data capacity (Yellow-Book)

• User Data/Block ................................................................2,048 bytes/block (Mode 1 & Mode 2 Form 1)

2,336 bytes/block (Mode 2)

2,328 bytes/block (Mode 2 Form 2)

2,352 bytes/block (CD-DA)

7) Rotational Speed

CD-Audio.............................................................................8x~24x(CAV) Approx.3,600 r/min

DAE speed ..........................................................................18x~40x(CAV) Approx.8,400 r/min

CD-RW data ........................................................................14x~32x(CAV) Approx.6,500 r/min

CD-ROM/CD-R data............................................................18x~40x(CAV) Approx.8,400 r/min

8) MTBF

• 125,000 POH at an operating duty of 10% at room temperature.

• DOS 3.1 or Higher

• Windows 95/98/2000/ME/XP

• OS/2 Warp (Ver 3.0)

• Solaris Ver 2.4 or higher

• Linux Slackware Ver 2.3

• Windows NT 4.0 or later

4. DRIVE PERFORMANCE

1) Data Transfer Rate

* Sustained Data Transfer Rate ..........................................300 Kbytes/s (2x)

600 Kbytes/s (4x)

1,200 Kbytes/s (8x)

1,800Kbytes/s(12x)

2,400Kbytes/s(16x)

3,600 Kbytes/s(24X)

2,700 to 6,000 Kbytes/s 18 to 40x CAV

* Burst Data Transfer Rate (ATAPI) ....................................16.67 Mbytes/s (PIO Mode 4)

16.67 Mbytes/s (MULTI-DMA Mode 2)

2) Average Access Time

Random Access ..................................................................110 ms Typical (Max.40X) : INCLUDING LATENCY

3) Data Buffer Capacity ...........................................................8 Mbytes

5. POWER REQUIREMENTS

1) Voltage

+5 V DC with +5% tolerance, less than 100 mVp-p Ripple voltage

+12 V DC with +5% tolerance, less than 100 mVp-p Ripple voltage

2) Current

• Hold Track State ...............................................................+5V DC 1.4A, +12V DC 0.5A (Typical)

• Seeking & Spin up ............................................................+5V DC 1.4A, +12V DC 0.9A (Typical)

6. AUDIO PERFORMANCE

* GCE-8240B FUNCTION TABLE

Item Typical Limit Test Signal Test Condition Note

Output Level

0.7 Vrms + 10 % 1KHz 0 dB No Filter at 47 kΩ

S/N 85 dB 75 dB 1KHz 0 dB with IHF-A + 20KHz LPF at 47kΩ

THD 0.08 % 0.1 % 1KHz 0 dB with IHF-A + 20KHz LPF at 47kΩ

Channel 65 dB 60 dB 1KHz 0 dB with IHF-A + 20KHz LPF at 47kΩ

Separation

Frequency + 2dB

Response

AUDIO OUT

+3 dB 20Hz~20KHz 0 dB No Filter at 47 kΩ

Funtion GCE-8240B

•CD-R Writing speed 8x/12x/16x/16x-24x ZCLV Data writing

•CD-RW Writing speed 2x/4x/10x Data writing

•CD-ROM Reading speed 40x Data transfer

MODEL

LOCATION OF CUSTOMER CONTROLS

1. Disc tray

This is the tray for the disc. Place the disc on the

ejected disc tray, then lightly push the tray (or

push the eject button) and the CD will be loaded.

NOTE: Don’t pull out or push in the disc tray

forcibly. This might cause damage to the loading

section of the drive.

2. Stop/Eject button

This button is pressed to open the CD tray.

This button works only when power is supplied to

the drive.

If an Audio CD is playing, pressing this button will

stop it, and pressing it again will open the tray.

3. Emergency Eject Hole

Insert a paper clip here to eject the Disc tray

manually or when there is no power.

4. Volume control

This is used to adjust the output volume of the

headphone jack. It can’t be used to adjust the

output volume for the audio output connectors on

the rear panel.

NOTE : Turn the volume down before turning on

the power. Sudden loud noises can damage your

hearing.

5. Headphone jack

This jack is for connecting headphones or mini-

speakers.

6. Drive activity indicators

Two colored LEDs are used to indicate the

operation of CD-R/RW Drive.

(1) Read

The orange color is displayed when the spindle

motor begins the Spin up operation: accessing

data, reading data, playing Audio, and up loading

tray.

(2) Write

The green color is flashed during disc writing

sessions.

READ

WRITE

Headphone Jack

Volume

Control Drive Activity Indicators

Stop/Eject Button

Disc Tray

Emergency Eject Hole

Front Panel

1. Power Connector

Connects to the power supply (5-and 12-V DC) of

the host computer.

NOTE : Be careful to connect with the proper

polarity. Connecting the wrong way may damage

the system (and is not guaranteed). Usually this

connector can only be attached one-way.

2. IDE Interface Connector

Connect to the IDE (Integrated Device

Electronics) Interface using a 40-pin flat IDE

cable.

NOTE : Do not connect or disconnect the cable

when the power is on, as this could cause a short

circuit and damage the system. Always turn the

power OFF when connecting or disconnecting the

cable.

3. Jumper Connector

This jumper determines whether the drive is

configured as a master or slave. Changing the

master-slave configuration takes effect after

power-on reset.

4. Analog Audio Output Connector

Provides output to a sound card (analog signal).

Generally you need this to play a regular audio

CD.

5. Digital Audio Output Connector

Provides output to a sound card (digital signal).

Digital Audio Output

Connector

Jumper Connector

Analog Audio Output Connector IDE Interface Connector

Power Connector

Rear Panel

1. CABINET and CIRCUIT BOARD

DISASSEMBLY

1-1. Bottom Chassis

A. Release 4 screws (A) and remove the Bottom Chassis

in the direction of arrow (1). (See Fig.1-1)

1-2. Front Bezel Assy

A. Insert and press a rod in the Emergency Eject

Hole and then the CD Tray will open in the direction

of arrow (2).

B. Remove the Tray Door in the direction of arrow

(3) by pushing the stoppers forward.

C. Release 3 stoppers and remove the Front Bezel Assy.

1-3. Cabinet and Main Circuit Board

A. Remove the Cabinet in the direction of arrow (4).

(See Fig. 1-3)

B. Release 2 hooks (a) and remove the CD Tray

drawing forward.

C. Remove the Main Circuit Board in the direction of

arrow (5).

D. At this time, be careful not to damage the 4

connectors, are positioned at right side, of the Main

Circuit Board.

2. MECHANISM ASSY DISASSEMBLY

2-1. Pick-up Unit

A. Release screws (B).

B. Separate the Pick-up Unit in the direction of arrow (6).

(4)

(5)

Main

Circuit Board

Hooks (a)

Cabinet

(A)

(A) (A)

(A)

(1)

Bottom Chassis

(2)

(3)

Tray Door

CD Tray

Front Bezel Assy

Emergency Eject Hole

Stoppers

Fig. 1-1

Fig. 1-2

DISASSEMBLY

Fig. 1-3

Mechanism Assy

Pick-up Unit

(B) (B)

(6)

Fig. 2-1

2-2. Pick-up

A. Release 2 screws (C) and remove the Pick-up.

Pick-up Unit

Pick-up

(C)

Fig. 2-2

ATIP Absolute Time in Pre-groove. With an additional modulation of the “Wobble”, the “Groove” contains a time

code information.

Wobble The pre-groove in the Disc is not a perfect spiral but is wobbled.

With : – A typical amplitude of 30 nm

– A spatial peried of 54~64 µm

CW Continuous Wave. The laser light output is at a constant level.

DOW Direct Over-Write. The action in which new information is recored over previously recorded information in

CD-RW disc.

Overwrite

The action in which new information is recorded over previously recorded information.

(Pre-)Groove

The guidance track in which clocking and time code information is stored by means of an FM

modulated wobble.

Land Land is characterized in the following way:

When radial signals are concerned,land is defined as the area between the grooves.

When HF signal are concerned,land is defined as the area between the marks(pits) in tangential

direction.

Hybrid Disc A Multisession disc of which the first Session is mastered. On a hybrid disc, recorded and

mastered information may co-exist.

Mastered Information,stored as pits on the disc during the manufacturing process of the disc.

Information (when making the master)

OPC Optimum Power Control. Procedure is determined optimum recording power according to CD-

R/RW Media in recording start step.

ROPC Running OPC. The purpose is to continuously adjust the writing power to the optimum power

that is required.

When the optimum power may change because of changed conditions of disc and change in

operating temperature.

Jitter The 16 value of the time variation between leading and trailing edges of a specific (I3 … I11) pit

or land as measured by Time Interval Analysis.

Deviation The difference between a fixed value of Pit length and Land length.

TOC Table Of Contents : in the Lead-in Area the subcode Q-channel contains information about the

Tracks on the disc.

Packet A method of writing data on a CD in small increments.

Writing Two kinds of packets can be written : Fixed-length and Variable-length.

Write The shape of the HF write signal used to modulate the power of the laser.

Strategy The Write Strategy must be used for recordings necessary for disc measurements.

Information Wobble, ATIP, Disc Identification, Write Power, Speed Range OPC Parameters, etc are

Area recorded in the Information area of CD-RW Disc

Finalization The action in which (partially) unrecorded or logically erased tracks are finished and the Lead-in

and/or Lead-out areas are recorded or overwritten with the appropriate TOC subcode.

Logical Erase

A method to remove information from a disc area by overwriting it with an EFM signal containing

mode 0 subcode

A logically erased area is equivalent to an unrecorded

Physical Erase

The action in which previously recorded information is erased by overwriting with a CW laser

output.

After a Physical Erase action, the erased area on the CD-RW disc is in the unrecorded state

again.

Session

An area on the disc consisting of a Lead-in area, a Program area, a lead-out area.

Multi session

A session that contains or can contain more than one session composed Lead-in and Lead-out

GLOSSARY

The differences of CD-R/CD-RW discs and General CD-ROM

1. Recording Layer

Recordable CD has a wobbled pre-groove on the surface of disc for laser beam to follow track.

2. Disc Specification

Read-only Disc

CD-R and CD-RW Disc

3~11T

1.6um

0.4~0.5 um

(Pit)Groove

Land

Track pitch(p)

Radial Direction

Groove

Land

Radial Error Signal

The Groove wobble

Average center

Actual center

CD-ROM CD-R CD-RW

Standard Yellow Book Orange Book II Orange Book III

Record Not available Write once Re-writable

I 11/Itop > 0.6 > 0.6 0.55 > M11> 0.70

(HF Modulation)

Write Laser Power(mW) 10-30 mW 6-25 mW

Read Laser Power(mW) < 0.5 mW < 0.7 mW < 1.0 mW

Jitter < 35 nsec < 35 nsec < 35 nsec

Reflectivity (Rtop) 70 % 65 % 15 % ~ 25 %

CD-ROM (READ-ONLY DISC) a=30nm

3. Disc Materials

1) CD-ROM disc

Laser Beam Groove

Substrate

(Polycarbonate)

Organic Dye Layer

Reflective Layer

Protective Layer

Label Printing

2) CD-R disc

Pigment Reflective Layer Color

Phtalocyanine Gold/Silver Yellow/White

Cyanine Gold/Silver Dark Green/Bright Green

Azo Gold/Silver Dark Blue

• It is composed of Silver _ colored aluminum plate and Reflective layer.

• Groove (Pit) of aluminum plate make a track.

• Laser wavelength : 780 nm, Laser Power (Read): 0.5mW

• Signal is detected by the

difference of reflective beam

intensity between “pit” and

“Land” on the disc.

• It is so-called WORM (Write Once Read Many) CD.

• It is composed of polycarbonate layer, Organic dye layer, Reflective layer, and Protective

layer.Gold/Silver Reflective layer is used to enhance the reflectivity

• According to the kinds of Organic dye layer, it is divided by Green CD, Gold CD, Blue CD.

• Laser Wavelength : 780 nm, Laser Power (read) : 1.2 mW

• Recording Power : 8x(9~30mW), 12x(12~38mW), 16x(14~44mW), 24x(18~50mW)

• When some part of dye layer is exposed to laser heat, it’s color changs black.Therefore, writing and

reading is enabled by the difference of reflectivity between changed part and unchanged part.

• Polycarbonate layer has Pre_Groove which make a Track.

Laser Beam

Pit

Substrate

(Polycarbonate)

Reflective Layer

Protective Layer

Label Printing

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