LG CRN-8240B Service Manual

GENERAL FEATURE

SPECIFICATIONS

1. SUPPORTED SYSTEM

• IBM Compatible 486SX or Above

2. SUPPORTED OS

3. GENERAL PERFORMANCE

• Data Transfer Rate ..........................................................................................Sustained Data Transfer Rate

.....................................................................................................................Normal Speed : 150 kbytes/sec

....................................................................................................24 Times Speed (MAX) : 3,600 kbytes/sec

• Data Buffer Capacity ...................................................................................128 kbytes (256 kbytes optional)

• Access Time ......................................................................................................1/3 Stroke : Average 130 ms

4. POWER REQUIREMENTS

• Voltage .......................................................................................................................................+5V DC +5%

• Ripple ....................................................................................................................................+5V : 100mVp-p

• Current .................................................................................................................Random access : 1,200mA

.............................................................................................................................Normal operation : 900mA

.............................................................................................................................................Standby : 40mA

.................................................................................................................................................Sleep : 30mA

5. AUDIO PERFORMANCE

• Frequency Response ......................................................................................................20Hz~20KHz( dB)

• S/N Ratio (IHF-A)..................................................................................................80 dB (Typical, 1KHz 0dB)

• T.H.D. (20K-LPF)..................................................................................................0.05% (Typical, 1KHz 0dB)

• Channel Separation ................................................................................................................70 dB (Typical)

• Dynamic Range (IHF-A)..........................................................................................................75 dB (Typical)

• Output Voltage (1kHz 0dB) 47kΩ Load .............................................................................0.85Vrms (Typical)

• Enhanced IDE interface

• Ultra Slim type CD-ROM drive (Height: 12.7mm)

• Fast 130ms Average Access Time

• MAX 3,600KB/sec (24X) Sustained Transfer rate

• Photo-CD Multisession Disc Spec compliant

• MPC level 3 Spec compliant

• Power Tray Eject method

• Built-in ATAPI Interface Controller

• Software Volume Control

• 4 Times Digital Filter for CD Audio

• Built-in MODE-1 ECC/EDC

• MTBF 125,000h POH (at 10% Utilization)

• PIO Mode 4 & Multi-word DMA Mode 2 support

• Digital audio through ATAPI Interface

• Subcode (P-W) through ATAPI Interface

• Spin-down Mode for energy saving

• Support Standby & Sleep mode

• MS-DOS Version 3.1 or Windows 3.1

• OS/2 Warp (Ver 3.0 & 4.0) or Higher

• Windows '95

• Windows NT (Version 3.51 or 4.0) or higher

-3

INITIAL LEAD-IN OPERATION

Reset or Power-On

Move the Optical Pick-Up inside until Limit-Switch is turned on

Laser Power On

Rotate Disc Motor

Focus Search

Focus Servo On

Tracking Servo On

Disc Motor Servo On

Read Lead-in Area

Search the Start of Data Area (00:02:16) and Pause

+ 4 hidden pages