LG GSA-H20A User manual

Super-Multi DVD Rewriter
SERVICE MANUAL
MODEL: GSA-H20A/
GSA-H20N/
GSA-H20L
P/NO : 3828HS1049E
may, 2006
Printed in Korea
MODEL : GSA-H20A/GSA-H20N/GSA-H20L

TABLE OF CONTENTS
INTRODUCTION .......................................................................................................................................................................3
FEATURES................................................................................................................................................................................4
SPECIFICATIONS...............................................................................................................................................................5~12
LOCATION OF CUSTOMER CONTROLS .......................................................................................................................13~14
DISASSEMBLY .................................................................................................................................................................15~16
1. CABINET and CIRCUIT BOARD DISASSEMBLY ..........................................................................................................15
2. MECHANISM ASSY DISASSEMBLY..............................................................................................................................15
EXPLODED VIEW .............................................................................................................................................................17~18
MECHANICAL REPLACEMENT PARTS LIST ................................................................................................................19~20
GLOSSARY.............................................................................................................................................................................21
THE DIFFERENCES OF CD-R/CD-RW DISCS AND GENERAL CD-ROM.....................................................................22~28
1. Recording Layer ..............................................................................................................................................................22
2. Disc Specification ............................................................................................................................................................22
3. Disc Materials ..................................................................................................................................................................23
4. Reading Process of Optical Disc.....................................................................................................................................24
5. Writing Process of CD-R Disc .........................................................................................................................................25
6. Writing Process of CD-RW Disc ......................................................................................................................................25
7. Organization of the PCA, PMA and Lead-in Area ...........................................................................................................26
8. Function of PCA and PMA area ......................................................................................................................................27
9. OPC and ROPC ..............................................................................................................................................................27
10. Writing Process of DISC................................................................................................................................................28
THE DIFFERENCES OF DVD-R/RW, DVD+R/RW DISCS AND DVD-ROM....................................................................29~37
1. Recording Layer ..............................................................................................................................................................29
2. Disc Specification ............................................................................................................................................................30
3. Disc Materials ..................................................................................................................................................................30
4. Writing Pulse Waveform of DVD+R.................................................................................................................................33
5. Writing Pulse Waveform DVD+RW .................................................................................................................................35
6. Organization of Inner Drive Area, Outer Drive Area, Lead-in Zone and Lead-out Zone .................................................36
LightScribe MEDIA...........................................................................................................................................................38~41
1. LightScribe Media............................................................................................................................................................38
2. Hardware Block Diagram of LightScribe Label Printing...................................................................................................39
3. MD Assy For LightScribe.................................................................................................................................................40
4. Optical Encoder Assy ......................................................................................................................................................41
DVD & CD DATA PROCESSING......................................................................................................................................42~45
1. Data Processing Flow......................................................................................................................................................42
2. Copy Protection and Regional Code Management Block ...............................................................................................43
3. About Prevention the DVD-ROm from to be copy...........................................................................................................44
4. About the DVD-ROM Regional Code ..............................................................................................................................45
INTERNAL STRUCTURE OF THE PICK-UP....................................................................................................................46~48
1. Block Diagram of the Pick-up ..........................................................................................................................................46
2. Pick up Pin Assignment...................................................................................................................................................47
3. Signal detection of the P/U..............................................................................................................................................48
DESCRIPTION OF CIRCUIT.............................................................................................................................................49~53
1. ALPC Circuit....................................................................................................................................................................49
2. Focus/Tracking/Sled Servo Circuit ..................................................................................................................................50
3. Spindle Circuit .................................................................................................................................................................52
MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION.............................................................................54~71
TROUBLESHOOTING GUIDE ..........................................................................................................................................72~88
How to use Test Tool.......................................................................................................................................................72~88
1. Dragon.............................................................................................................................................................................84
2. Camus .............................................................................................................................................................................88
BLOCK DIAGRAM ............................................................................................................................................................89~90
CIRCUIT DIAGRAM ..........................................................................................................................................................91~93
PRINTED CIRCUIT BOARD DIAGRAM ...........................................................................................................................94~97
ELECTRICAL REPLACEMENT PARTS LIST........................................................................................................................98
CAUTION - INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAM.

3
INTRODUCTION
Model name of GSA-H20#/GSA-H21# Series
This service manual provides a variety of service
information.
It contains the mechanical structure of the Super
Multi DVD Rewriter and the electronic circuits in
schematic form. This Super Multi DVD Rewriter was
manufactured and assembled under our strict quality
control standards and meets or exceeds industry
specifications and standards.
This Super Multi DVD Rewriter 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 700 Mbytes of digital data stored in
a CD-ROM, CD-R and CD-RW disc.
It can write as much as 4.7Gbytes of digital data into
DVD+R/RW disc, and can read as much as
4.7Gbytes of digital data stored in a DVD-ROM,
DVD-R, DVD-RW, DVD+R and DVD+RW disc.
This Super Multi DVD Rewriter 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.
Model Name
GSA-H20N
GSA-H20L
GSA-H20V
GSA-H20A
GSA-H21N
GSA-H21L
GSA-H21V
GSA-H21A
LS
X
O
X
O
X
O
X
O
Optioanl Features
VPCS
X
X
O
O
X
X
O
O
RAM
O
O
O
O
X
X
X
X
Product Name
Super-multi
Dual

4
FEATURES
1 General
1) Enhanced IDE (ATAPI) interface.
2) Internal Half-height Drive.
3) CD-R/RW, DVD-R/-R DL/-RW/+R/+R DL/+RW/RAM read and write compatible CD Family and DVD-
ROM read compatible.
4) Buffer Under-run prevention function embedded.
5) 2MB buffer memory.
6) Power loading and power eject of a disc. Bare media loading.
7) MTBF : 125,000 POH
8) Vertical and Horizontal installable.
9) Support LightScribe Direct Label Printing Technology(GSA-H20L/GSA-H20A only)
2. Supported disc formats
1) Reads data in each DVD-ROM, DVD-R, DVD-R (Ver.1.0, Ver.2.0 for Authoring), and DVD-RAM (Ver. 2.0
& Higher)
2) Read and writes in each DVD-R (Ver.2.0 for General), -R DL, -RW, DVD-RAM(Ver.2.0 & Higher),
DVD+R and +RL (Double layer), +RW
3) Reads data in each CD-ROM, CD-ROM XA, CD-I, Video CD, CD-Extra and CD-Text
4) Reads data in Photo CD (Single and Multi session).
5) Reads standard CD-DA
6) Reads and writes CD-R discs conforming to “Orange Book Part 2”
7) Reads and writes CD-RW discs conforming to “Orange Book Part 3”
8) Reads DVD-RAM with CPRM and DVD-RW with CPRM
9) LightScribe DVD+R conforming to “LightScribe Media Specification”
10) LightScribe CD-R conforming to “LightScribe Media Specification”
3. Supported write method
1) DVD-R : Disc at Once and Incremental Recording.
2) DVD-R DL : Disc at Once and Incremental Recording
3) DVD-RW : Disc at Once, Incremental Recording and Restricted Overwrite.
4) DVD+R : Sequential Recording
5) DVD+R DL : Sequential Recording
6) DVD+RW : Random Write
7) CD-R/RW : Disc at Once, Session at Once, Track at Once and Packet Write
8) DVD-RAM : Random Write (Ver. 2.0 & Higher)
9) LightScribe Label Printing Functions complying with “LightScribe System Specification”
4. Audio
1) 16 bit digital data output through ATA interface.
2) Software Volume Control
3) Equipped with audio line output for audio CD playback.

5
SPECIFICATIONS
I. MODEL : GSA-H20N
1. SYSTEM REQUIREMENTS
-CPU: IBM Compatible Pentium4 1.6GHz (or faster)
(For High speed, 2GHz or faster recommended.)
-128MB Memory or greater
• SUPPORTING OPERATING SYSTEM
2. GENERAL DESCRIPTION
2.1 Applicable disc formats
DVD DVD-ROM: 4.7GB (Single Layer)
8.5GB (Dual Layer)
DVD-R: 3.95GB (Ver.1.0 : read only)
4.7GB (Ver.2.0 for Authoring : read only)
4.7GB (Ver.2.0 for General: read & write)
DVD-RW: 4.7GB (Ver.1.1)
DVD+R: 4.7GB
DVD+R DL: 8.5GB
DVD-R DL: 8.5GB
DVD+RW: 4.7GB
DVD-RAM: 4.7GB(Ver.2.0 & higher)
CD CD-ROM Mode-1 data disc
CD-ROM Mode-2 data disc
CD-ROM XA, CD-I, Photo-CD Multi-Session, Video CD
CD-Audio Disc
Mixed mode CD-ROM disc (data and audio)
CD-Extra
CD-Text
CD-R (Conforming to “Orange Book Part2”: read & write)
CD-RW (Conforming to “Orange Book Part3”: read & write)
2.2 Disc diameter 120mm
80mm (Horizontal only)
2.3 Data capacity
• User Data/Block DVD-ROM/R/RW/+R/+RW ...............2,048 bytes/block
CD (Yellow Book) ..........................................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)
* Operating System
Window 98 Second Edition
(Not supported in LightScribe)
Windows Millennium Edition(Me)
(Not supported in LightScribe)
Window 2000 Professional
Window XP Home Edition, Professional
* Recording tool
(1) RecordNow (Sonic)
(2) DLA (sonic)
(3) Nero(Ahead)
(4) In CD(Ahead)
(5) Easy CD Creator (Roxio)
(6) Direct CD (Roxio)

6
3. DRIVE PERFORMANCE
3.1 Host interface ........................................................X3T13 ATA/ATAPI5/1321D
INF-8090i Rev.5.3
3.2 Read/Write & Rotational speed
<Write> DVD-R .................................................2x, 4x (CLV), 8x (ZCLV), 12x (PCAV), 16x (CAV)
DVD-RW..............................................1x, 2x, 4x (CLV), 6x (ZCLV)
DVD+R ................................................2.4x, 4x (CLV), 8x (ZCLV), 12x (PCAV), 16x (CAV)
DVD+RW .............................................2.4x, 4x (CLV), 8x (ZCLV)
DVD+R DL...........................................2.4x, 4x (CLV), 6x, 8x (ZCLV)
DVD-R DL............................................4x (CLV)
DVD-RAM(Ver.2.0 & Higher)...............2x, 3x (CLV), 5x (PCAV)
CD-R....................................................16x (CLV), 24x (ZCLV), 40x, 48x (CAV)
CD-RW ................................................4x, 10x, 16x (CLV), 24x, 32x (ZCLV)
(High Speed : 8x, 10x, Ultra Speed>16x)
<Read> DVD-ROM ............Single layer ...........6.7x ~ 16x (CAV), Approx. 9,200 r/min
Dual layer..............5x ~ 12x (CAV), Approx. 7,600 r/min
DVD-Video(CSS).................................3.3x ~ 8x (CAV), Approx. 4,500 r/min
DVD-R ...................3.95GB..................6.7x ~ 16x (CAV), Approx. 9,200 r/min
4.7GB....................6.7x ~ 16x (CAV), Approx. 9,200 r/min
DVD-RW................4.7GB....................5x ~ 12x (CAV), Approx. 7,000 r/min
DVD+R ..................4.7GB....................6.7x ~ 16x (CAV), Approx. 9,200 r/min
DVD+RW...............4.7GB....................5x ~ 12x (CAV), Approx. 7,000 r/min
DVD+R DL.............8.5GB....................5x ~ 12x (CAV), Approx. 7,600 r/min
DVD-R DL .............8.5GB....................5x ~ 12x (CAV), Approx. 7,600 r/min
DVD-RAM (Ver. 2.0 & Higher).............3x ~ 5x (PCAV), Approx. 5,500 r/min
CD-R/ROM, data/CD-I .........................20x ~ 48x (CAV), Approx. 9,800 r/min
CD-RW ................................................17x ~ 40x (CAV), Approx. 8,000 r/min
CD-DA (DAE).......................................17x ~ 40x (CAV), Approx. 8,000 r/min
CD-DA (Audio out)/VideoCD ...............6x ~ 15x (CAV), Approx. 3,130 r/min
3.3 Data transfer rate
3.3.1 Sustained transfer rate
<Write> DVD-R...................16x (CAV).............8.91 ~ 22.16 Mbytes/s (Max)
DVD-RW................6x (ZCLV) .............8.31 Mbytes/s (Max)
DVD+R ..................16x (CAV).............8.91 ~ 22.16 Mbytes/s (Max)
DVD+RW...............8x (ZCLV) .............11.08 Mbytes/s (Max)
DVD+R DL ............8x (ZCLV) .............11.08 Mbytes/s (Max)
DVD-R DL .............4x (CLV) ..............5.54 Mbytes/s (Max)
DVD-RAM..............5x (PCAV) ............4.15 ~ 6.925 Mbytes/s (Max)
(w/o Verify) ...........(Ver.2.0 & higher)
CD-R .....................48x (CAV) .............2,400 ~ 7,200 kB/s (Mode-1) (Max)
CD-RW..................32x(ZCLV) ............2,400 ~ 3,600 kB/s (Mode-1) (Max)
<Read> DVD-ROM ............Single layer...........6.88 ~ 22.16 Mbytes/s (16x) Max.
Dual layer .............4.58 ~ 11.08 Mbytes/s (12x) Max.
DVD+/-R..............................................9.28 ~ 22.16 Mbytes/s (16x) Max.
DVD+/-RW/DL.....................................4.58 ~ 11.08 Mbytes/s (12x) Max.
DVD-RAM............................................4.155 ~ 6.93 Mbytes/s (5x) Max
CD-R/ROM..........................................2,700 ~ 7,200 kbytes/s (48x) Max.
CD-RW................................................2,550 ~ 6,000 kbytes/s (40x) Max.
CD-DA(DAE) .......................................2,550 ~ 6,000 kbytes/s (40x) Max.

3.3.2 Burst transfer rate
Ultra DMA Mode 2..........................................33.3 Mbytes/s Max.
Multiword DMA Mode 2..................................16.6 Mbytes/s Max.
PIO Mode 4 ....................................................16.6 Mbytes/s Max.
3.4 Access time (Random)
* Typical value
DVD-ROM(SL) ...............................................140 ms Typ. (Note 1)
DVD-ROM(DL) ...............................................175 ms Typ. (Note 1)
CD-ROM ........................................................120 ms Typ. (Note 1)
DVD-RAM ......................................................200 ms Typ. (Note 1)
Note :
1) Average random access time is the typcal value of more than 50 times including latency and error correction time.
Test Disc : DVD : ALMEDIO TDV-520 / TDR-820
CD : ALMEDIO TCDR-701 / HITACH HCD-1
*) Typical value defines a measured value in normal temperature (20 deg.C.) and horizontal position.
3.5 Data error rate (Measured with 5 retries maximum)
DVD-R/RW/ROM/RAM ..................................<10 -12
DVD+R/RW....................................................<10 -12
CD-ROM/R/RW..............................................<10-12 (Mode-1)
.......................................................................<10-9 (Mode-2)
Condition : It is assumed that the worst case raw error rate of the disc is 10-3
3.6 Data buffer capacity .......................................................2Mbytes
4. Quality and Reliability
4.1 MTBF ................................................125,000 Power On Hours(Consecutive/Cumulative POH)
Assumption : ..........................Used in a normall office environment at room temperature.
-POH per year.........................3,000
-ON/OFF cycles per year ........600
-Operating duty cycle ..............20% of power on time (Seek: 5% of operating time)
4.2 Tray cycle test...................................30,000 times
No degeneration in the mechanical part after test
4.3 Actuator mechanism ........................1,000,000 full stroke seek
4.4 MTTR (Mean Time To Repair) ...........0.5 h
4.5 Component life .................................5 years or 2,000 h of Laser radiating time
Assumption : ..........................Used in a normall office environment.
5. POWER REQUIREMENTS
5.1 Source voltage
+5V +5% tolerance, less than 100 mVp-p Ripple voltage
+12V +10% tolerance, less than 100 mVp-p Ripple voltage
5.2 Current
Idle (Hold track state)..............+5V DC 0.6A Typ. < 1.0 A Max.
+12V DC 0.5A Typ. < 1.0 A Max.
Write (Active) ..........................+5V DC 1.3A Typ. < 1.5 A Max.
+12V DC 1.0A Typ. < 1.3 A Max.
Read (Active) ..........................+5V DC 1.3A Typ. < 1.5 A Max.
+12V DC 1.0A Typ. < 1.3 A Max.
Seek (Access).........................+5V DC 0.7A Typ. < 1.2 A Max.
+12V DC 0.7A Typ. < 1.2 A Max.
3 Standby
Sleep mode (No disc) .............1.1 W Typ. <1.3 W Max.
7

7. Acoustic noise
Less than 50dB, A scale, at 0.5 m away from the drive
Note : 1. Disc : Less than unbalance 0.3 x10-4 Nm (0.3g-cm)
2. Installation : Horizontal
3. Ambient temperature : Normal temperature
4. Sequential read at max speed except loading, unloading and seek
8. Dimensions
External dimensions (W x H xD) 146 x 41.3 x 165mm
Front bezel (WxHxD) 148 x 42 x 5 mm
9. Mass .................................................max 800g
* Please Contact the friendly staff of LG Service Care at: Website http: //www.LGEservice.com
8
6. AUDIO PERFORMANCE
Item Typical Test Signal Test Condition Note
Output Level 0.7 Vrms 1KHz 0 dB No Filter
Frequency response +/-3dB 20-20kHz 0dB at 47kΩ
THD 0.1% 1KHz 0 dB with IHF-A + 20KHz LPF
Headphone output level(Optional) - - - None
AUDIO OUT

9
II. MODEL : GSA-H20A/GSA-H20L
1. SYSTEM REQUIREMENTS
-CPU: IBM Compatible Pentium4 1.6GHz (or faster)
(For High speed, 2GHz or faster recommended.)
-128MB Memory or greater
• SUPPORTING OPERATING SYSTEM
2. GENERAL DESCRIPTION
2.1 Applicable disc formats
DVD DVD-ROM: 4.7GB (Single Layer)
8.5GB (Dual Layer)
DVD-R: 3.95GB (Ver.1.0 : read only)
4.7GB (Ver.2.0 for Authoring : read only)
4.7GB (Ver.2.0 for General: read & write)
DVD-RW: 4.7GB (Ver.1.1)
DVD+R: 4.7GB
DVD+R DL: 8.5GB
DVD-R DL : 8.5GB
DVD+RW: 4.7GB
DVD-RAM: 4.7GB(Ver. 2.0 & higher)
CD CD-ROM Mode-1 data disc
CD-ROM Mode-2 data disc
CD-ROM XA, CD-I, Photo-CD Multi-Session, Video CD
CD-Audio Disc
Mixed mode CD-ROM disc (data and audio)
CD-Extra
CD-Text
CD-R (Conforming to “Orange Book Part2”: read & write)
CD-RW (Conforming to “Orange Book Part3”: read & write)
2.2 Disc diameter 120mm
80mm (Horizontal only)
2.3 Data capacity
• User Data/Block DVD-ROM/R/RW/+R/+RW ...............2,048 bytes/block
CD (Yellow Book) ..........................................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)
* Operating System
Window 98 Second Edition
(Not supported in LightScribe)
Windows Millennium Edition (Me)
(Not supported in LightScribe)
Window 2000 Professional
Window XP Home Edition, Professional
* Recording tool
(1) RecordNow (Sonic)
(2) DLA (sonic)
(3) Nero(Ahead)
(4) In CD(Ahead)
(5) Easy CD Creator (Roxio)
(6) Direct CD (Roxio)

10
3. DRIVE PERFORMANCE
3.1 Host interface ........................................................X3T13 ATA/ATAPI5/1321D
INF-8090i Rev.5.3
3.2 Read/Write & Rotational speed
<Write> DVD-R .................................................2x, 4x (CLV), 8x (ZCLV), 12x (PCAV), 16x (CAV)
DVD-RW..............................................1x, 2x, 4x (CLV), 6x (ZCLV)
DVD+R ................................................2.4x, 4x (CLV), 8x (ZCLV), 12x (PCAV), 16x (CAV)
DVD+RW .............................................2.4x, 4x (CLV), 8x (ZCLV)
DVD+R DL...........................................2.4x, 4x (CLV), 6x, 8x (ZCLV)
DVD-R DL............................................4x (CLV)
DVD-RAM(Ver.2.0 & Higher)...............2x, 3x (CLV), 5x (PCAV)
CD-R....................................................16x (CLV), 24x (ZCLV), 40x, 48x (CAV)
CD-RW ................................................4x, 10x, 16x (CLV), 24x, 32x (ZCLV)
(High Speed : 8x, 10x, Ultra Speed>16x)
<Read> DVD-ROM ............Single layer ...........6.7x ~ 16x (CAV), Approx. 9,200 r/min
Dual layer..............5x ~ 12x (CAV), Approx. 7,600 r/min
DVD-Video(CSS).................................3.3x ~ 8x (CAV), Approx. 4,500 r/min
DVD-R ...................3.95GB..................6.7x ~ 16x (CAV), Approx. 9,200 r/min
4.7GB ...................6.7x ~ 16x (CAV), Approx. 9,200 r/min
DVD-RW................4.7GB....................5x ~ 12x (CAV), Approx. 7,000 r/min
DVD+R ..................4.7GB....................6.7x ~ 16x (CAV), Approx. 9,200 r/min
DVD+RW...............4.7GB....................5x ~ 12x (CAV), Approx. 7,000 r/min
DVD+R DL.............8.5GB....................5x ~ 12x (CAV), Approx. 7,600 r/min
DVD-R DL .............8.5GB....................5x ~ 12x (CAV), Approx. 4,500 r/min
DVD-RAM (Ver. 2.0 & Higher).............3x ~ 5x (PCAV), Approx. 5,500 r/min
CD-R/ROM, data/CD-I .........................20x ~ 48x (CAV), Approx. 9,800 r/min
CD-RW ................................................17x ~ 40x (CAV), Approx. 8,000 r/min
CD-DA (DAE).......................................17x ~ 40x (CAV), Approx. 8,000 r/min
CD-DA (Audio out)/VideoCD ...............6x ~ 15x (CAV), Approx. 3,130 r/min
3.3 Data transfer rate
3.3.1 Sustained transfer rate
<Write> DVD-R...................16x (CAV) ..............8.91 ~ 22.16 Mbytes/s (Max)
DVD-RW................6x (ZCLV) ..............8.31 Mbytes/s (Max)
DVD+R ..................16x (CAV)..............8.91 ~ 22.16 Mbytes/s (Max)
DVD+RW...............8x (ZCLV) ..............11.08 Mbytes/s (Max)
DVD+R DL ............8x (ZCLV) ..............11.08 Mbytes/s (Max)
DVD-R DL .............4x (CLV) ...............5.54 Mbytes/s (Max)
DVD-RAM..............5x (PCAV)..............4.15 ~ 6.925 Mbytes/s (Max)
(Ver.2.0 & higher)..(w/o Verify) ............
CD-R .....................48x (CAV) ..............2,400 ~ 7,200 kB/s (Mode-1) (Max)
CD-RW..................32x(ZCLV) .............2,400 ~ 3,600 kB/s (Mode-1) (Max)
<Read> DVD-ROM ............Single layer............6.88 ~ 22.16 Mbytes/s (16x) Max.
Dual layer ..............4.58 ~ 11.08 Mbytes/s (12x) Max.
DVD+/-R...............................................9.28 ~ 22.16 Mbytes/s (16x) Max.
DVD+/-RW/DL......................................4.58 ~ 11.08 Mbytes/s (12x) Max.
DVD-RAM.............................................4.155 ~ 6.93 Mbytes/s (5x) Max
CD-R/ROM ...........................................2,700 ~ 7,200 kbytes/s (48x) Max.
CD-RW .................................................2,550 ~ 6,000 kbytes/s (40x) Max.
CD-DA(DAE) ........................................2,550 ~ 6,000 kbytes/s (40x) Max.

3.3.2 Burst transfer rate
Ultra DMA Mode 2..........................................33.3 Mbytes/s Max.
Multiword DMA Mode 2..................................16.6 Mbytes/s Max.
PIO Mode 4 ....................................................16.6 Mbytes/s Max.
3.4 Access time (Random)
* Typical value
DVD-ROM(SL) ...............................................140 ms Typ. (Note 1)
DVD-ROM(DL) ...............................................175 ms Typ. (Note 1)
CD-ROM ........................................................120 ms Typ. (Note 1)
DVD-RAM ......................................................200 ms Typ. (Note 1) (Ver 2.0 & higher)
Note :
1) Average random access time is the typcal value of more than 50 times including latency and error correction time.
Test Disc : DVD : ALMEDIO TDV-520 / TDR-820
CD : ALMEDIO TCDR-701 / HITACH HCD-1
*) Typical value defines a measured value in normal temperature (20 deg.C.) and horizontal position.
3.5 Data error rate (Measured with 5 retries maximum)
DVD-R/RW/ROM/RAM ..................................<10 -12
DVD+R/RW....................................................<10 -12
CD-ROM/R/RW..............................................<10-12 (Mode-1)
<10-9 (Mode-2)
Condition : It is assumed that the worst case raw error rate of the disc is 10-3
3.6 Data buffer capacity .......................................................2Mbytes
3.7 LightScribe Label Printing (** MKM LS-CD 2.0, ** Full Image Printing)
3.7.1 Printing Time
Best............................................................................less than 29 minutes
Normal .......................................................................less than 24 minutes
Draft ...........................................................................less than 18 minutes
3.7.2 Image Contrast complying to the colorimetry standard CIE L*a*b, defined as Delta L( ΔL)
Best............................................................................higher than 28
Normal........................................................................higher than 20
Draft ...........................................................................higher than 12
* Note (1) DRF Parameters for this spec : Max LV=1400mm/sec, TrackShift=85 or 75,
Max. Laser Power=38mW
(2) T.B.D (High Speed LightScribe Label Printing)
4. Quality and Reliability
4.1 MTBF..................................................125,000 Power On Hours(Consecutive/Cumulative POH)
Assumption : ..........................Used in a normall office environment at room temperature.
-POH per year.........................3,000
-ON/OFF cycles per year........600
-Operating duty cycle..............20% of power on time (Seek: 5% of operating time)
4.2 Tray cycle test...................................30,000 times
No degeneration in the mechanical part after test
4.3 Actuator mechanism ........................1,000,000 full stroke seek
4.4 MTTR (Mean Time To Repair) ...........0.5 h
4.5 Component life .................................5 years or 2,000 h of Laser radiating time
Assumption : ..........................Used in a normall office environment.
11

7. Acoustic noise
Less than 50dB, A scale, at 0.5 m away from the drive
Note : 1. Disc : Less than unbalance 0.3 x10-4 Nm (0.3g-cm)
2. Installation : Horizontal
3. Ambient temperature : Normal temperature
4. Sequential read at max speed except loading, unloading and seek
8. Dimensions
External dimensions (W x H xD) 146x41.3x165mm
Front bezel (WxHxD) 148x42x5 mm
9. Mass .................................................Max. 800g
* Please Contact the friendly staff of LG Service Care at: Website http: //www.LGEservice.com
12
5. POWER REQUIREMENTS
5.1 Source voltage
+5V +5% tolerance, less than 100 mVp-p Ripple voltage
+12V +10% tolerance, less than 100 mVp-p Ripple voltage
5.2 Current
Idle (Hold track state)..............+5V DC 0.6A Typ. < 1.0 A Max.
+12V DC 0.5A Typ. < 1.0 A Max.
Write (Active) ..........................+5V DC 1.3A Typ. < 1.5 A Max.
+12V DC 1.0A Typ. < 1.3 A Max.
Read (Active) ..........................+5V DC 1.3A Typ. < 1.5 A Max.
+12V DC 1.0A Typ. < 1.3 A Max.
Seek (Access).........................+5V DC 0.7A Typ. < 1.2 A Max.
+12V DC 0.7A Typ. < 1.2 A Max.
Label Printing..........................+5V DC 0.7A typ. < 1.0 A max.
+12V DC 0.3 A typ. < 1.0 A max.
5.3 Standby
Sleep mode (No disc) .............1.1 W Typ. <1.3 W Max.
6. AUDIO PERFORMANCE
Item Typical Test Signal Test Condition Note
Output Level 0.7 Vrms 1KHz 0 dB No Filter
Frequency response +/-3dB 20-20kHz 0dB at 47kΩ
THD 0.1% 1KHz 0 dB with IHF-A + 20KHz LPF
Headphone output level(Optional) - - - None
AUDIO OUT

Drive Activity Indicators
Stop/Eject Button
Disc Tray
Emergency Eject Hole
LOCATION OF CUSTOMER CONTROLS
13
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 Disc 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 Disc tray.
This button works only when power is supplied to
the drive.
3. Emergency Eject Hole
Insert a paper clip here to eject the Disc tray
manually or when there is no power.
4. Drive activity indicator
Green colored LED is used to indicate the
operation of the Drive.
Front Panel

14
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
This connector is not supported.
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 Disc 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. When the Disc tray has been opened completely,
lift 2 points (a) and remove the Disc tray while
drawing out simultaneously.
C. Remove the Soldering of the LD- and LD+ (b) for
the Loading Motor, and then remove the Main
Circuit Board.
D. At this time, be careful not to damage the 5
connectors of the Main Circuit Board.
Main
Circuit Board
Cabinet
(4)
(5)
(a)
(b)
(A)
(A) (A)
(A)
(1)
Bottom Chassis
(2)
(3)
Tray Door
Disc Tray
Front Bezel Assy
Emergency Eject Hole
Stoppers
Fig. 1-1
Fig. 1-2
DISASSEMBLY
15
Fig. 1-3

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).
2-2. Pick-up
A. Release 1 screw (C) and remove the Pick-up.
Pick-up Unit
Pick-up
(C)
Fig. 2-2
16
Mechanism Assy
Pick-up Unit
(6)
(B) (B)
Fig. 2-1

030
014
007
A02
A01 A03
021
028
028
452
032
452
020
021
050
430
005 035 004
006
A B C D E F GH
1
2
3
4
5
452
024
481
034
027
026
033
025
430
419
020
453
031
036
453
003
002
010
011
009
008
012
016
015
013
PBM00 (MAIN C.B.A)
PBF00 (FRONT C.B.A)
482 482
482
001
482
17 18
EXPLODED VIEW

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
21

22
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
Iw
A
O
a
a
Groove
Land
Radial Error Signal
The Groove wobble
Average center
Actual center
CD-ROM (READ-ONLY DISC) a=30nm
ITEM CD-ROM CD-R CD-RW
Standard Yellow Book Orange Book II Orange Book III
Record Not available Write once Re-Writeable
Tracking Signal I11/Itop > 0.6 > 0.6 0.55 > M11> 0.70
(HF Modulation)
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 %
Remark) Write Laser Power(mW) 14-65 mW 6-45 mW

23
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) : 0.7 mW
• Recording Power : 8x(14~20mW), 16x(25~35mW)
• 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
