LG CED-8081B Manuel utilisateur

INTRODUCTION

FEATURES

1. General

1) Enhanced IDE interface.

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

3) 2 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.

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 100 ms average access time.

2) Max 4,800 kB/sec (Max 32X) Sustained Transfer rate.

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

4) Supports CD-R write operation at double speed, quadruple speed, and eight speed.

5) Supports CD-RW write operation at double speed and quadruple speed.

6) PIO Mode 4 & Multi DMA Mode 2 Support.

7) MPC-3 Spec compliant.

5. Audio

1) Output 16 bit digital data over ATA interface.

2) 4 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 650

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 233MHZ (or faster)

(For 8X Write speed, 266MHz or faster recommended.)

-32MB 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 Ready, 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-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) .........................................................2 Mbyte

5) Disc diameter ......................................................................12 cm (8 cm Read only)

6) Data capacity (Yellow-Book)

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

2,336 bytes/block (Mode 2)

2,324 bytes/block (Mode 2 Form 2)

2,352 bytes/block (CD-DA)

7) Rotational Speed

CD-Audio.............................................................................6x~15x(CAV) Approx.3000 rpm

CD-RW data ........................................................................8x~20x(CAV) Approx.4000 rpm

CD-ROM/CD-R data............................................................14x~32x(CAV) Approx. 7000 rpm

8) MTBF

• 120, 000 POH at an operating duty of 10% at room temperature.

4. DRIVE PERFORMANCE

1) Data Transfer Rate

* Sustained Data Transfer Rate ..........................................150 Kbytes/s (1x)

300 Kbytes/s (2x)

600 Kbytes/s (4x)

1,200 Kbytes/s (8x)

2,400 Kbytes/s (16x)

2,100 to 4,800 Kbytes/s 14 to 32x CAV

• DOS 3.1 or Higher

• Windows ‘95/’98/’2000

• OS/2 Warp (Ver 3.0)

• Solaris Ver 2.4 or higher

• Linux Slackware Ver 2.3

• Windows NT 4.0 or later

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

16.67 Mbytes/sec (MULTI-DMA Mode 2)

2) Average Access Time

Random Access ..................................................................100 ms Typical (Max.32X) : INCLUDING LATENCY

3) Data Buffer Capacity ...........................................................2 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 1.0A, +12 V DC 0.8A

• Seeking & Spin up ............................................................+5 V DC 1.2A, +12 V DC 1.0A

6. AUDIO PERFORMANCE

* CED-8081B 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 80 dB 75 dB 1KHz 0 dB with IHF-A + 20KHz LPF at 47kΩ

THD 0.2 % 0.25 % 1KHz 0 dB with IHF-A + 20KHz LPF at 47kΩ

Channel 70 dB 65 dB 1KHz 0 dB with IHF-A + 20KHz LPF at 47kΩ

Separation

Frequency + 2dB

Response

H/P

Output Level

AUDIO OUT

+3 dB 20Hz~18KHz 0 dB No Filter at 47 kΩ

0.6Vrms +20 % 1KHz 0dB No Filter H/P Volume MAX at 32 Ω

FFuunnttiioonnCCEEDD--88008811BB

•CD-R Writing speed 2x/4x/8x Data writing

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

•CD-ROM Reading speed 32x Data transfer

MMOODDEELL

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. Play/Skip button

When an Audio CD is in the disc drawer, pressing

this button will start playing Audio CDs from the

first track. If an Audio CD is playing, pressing this

button will skip to the next track.

4. Emergency Eject Hole

Insert a paper clip here to eject the Disc tray

manually or when there is no power.

5. 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.

6. Headphone jack

This jack is for connecting headphones or mini-

speakers.

7. 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

COMPACT

Headphone Jack

Volume

Control Drive Activity Indicators

Play/Skip Button

Stop/Eject Button

Disc Tray

Emergency Ejct 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 ANALOG

INTERFACE POWER

DRCS M

SLA

GLG39

+5 +12

GND

AUDIO AUDIO

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 left side, of the Main

Circuit Board.

2. MECHANISM ASSY DISASSEMBLY

2-1. Pick-up Unit

A. Release 2 screws (B).

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

(4)

(5)

Main

Circuit Board

Cabinet

Hooks (a)

(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)

(6)

Fig. 1-4

2-2. Pick-up

A. Release 1 screw (C) and remove the Pick-up.

2-3. Sled Motor Assy

A. Release 2 screws (D),(E) and remove the Sled

Motor Assy.

(D) (E)

Sled Motor Assy

Pick-up Unit

Pick-up

(C)

Fig. 1-5

Fig. 1-6

TROUBLESHOOTING GUIDE

Are the pin 41

and 44 of PN201 +12V and +5V

respectively after the power

cable connecting?

Reset or Power Check.

• Check the power(12V, 5V) short.

• Check PC power cable.

• Repair the PC power supply.

• Check the IC101(RESET IC).

• Check the IC102(PQ1U331), IC201

(OTI-9790), IC301(MB90F476)

Does the pin 1

of IC101 change 0V to 5V at the

power supply initial input mode?

• Is the pin 16 of IC401 4.0V?

• Is the pin 31 of IC401 2.0V?

• Is the pin 5 of IC102 3.3V?

• Is the pin 7 of IC514 2.5V?

• Is the pin 1 and 2 of IC514 2.0V?

• Is the pin 1 of IC512 8.0V?

YES

Are the X201 and X301 oscillating?

• Check the X201, X301.

• Check the IC201, IC301.

• Check the IC401(OTI9071).

• Check the IC102(PQ1U331).

Check the IC514(NJM3414).

• Check the IC512(NJM7808).

Check it after connecting the power cable

only on interface cable for NO Reset or

Power ON.

YES

System Check.

Go to “Tray operating is abnormal”

Load tray without inserting disc.

Does Tray operate normally?

Does Pick-up move to inside?

Does Spindle Motor

rotate in a moment?

Does Laser turn on?

After eject tray, Inset CD-ROM Disc

and reloading.

Does Disc stop?

Does Disc rotate

continuously as Disc recognition is

abnormal?

After eject tray, Inset CD-R Blank Disc

and reloading.

Does Disc rotate

continuously as Disc recognition is

abnormal?

Does Disc stop?

Go to “Sled operating is abnormal”

Go to “Spindle operating is

abnormal”

Go to “Laser is abnormal”

Go to “Spindle control is abnormal 1”

Go to “Spindle control is abnormal 2”

Go to “Spindle control is abnormal3”

Go to “Disc recognition is abnormal”

YES

Does Lens move

Up/Down?

Go to “Focus Actuator operating is

abnormal”

YES

Is the input voltage

0V at IC301 pin 10 when push the

SW802?

Tray operating is abnormal.

Is there Tray

drive voltage output?

(IC501 pin 15, 16)

Is TRAY_MUTE signal “L”?

(IC501 pin 20)

• Check the connection of IC301 pin 10.

• Replace the SW802(Eject s/w)

(Tray open/close doesn’t work)

• Check the connection of IC301 pin 18.

• Replace the IC301.

• Check the Tray Connector(PN301).

• Check the Motor Line and Motor.

YES

Is there Tray control signal input?

(IC501 pin 26)

• Check the connection of IC409 pin 12.

• Replace the IC409(BU2500FU).

• Check the communication line between

IC409 and IC301(MICOM).

YES

YES YES

When PN301

is open, Is there Tray drive

signal output?

• Replace the IC501(BA5983FM).

YES

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