LG GWA-4164B User manual

DVD/CD RewritableDrive
SERVICE MANUAL
MODEL: GWA-4164B/
GWA-4166B/
GSA-4166B
P/NO : 3828HS1049D
July, 2005
Printed in Korea
MODEL : GWA-4164B/GWA-4166B/GSA-4166B

TABLE OF CONTENTS
INTRODUCTION .......................................................................................................................................................................3
FEATURES................................................................................................................................................................................4
SPECIFICATIONS...............................................................................................................................................................5~14
LOCATION OF CUSTOMER CONTROLS .......................................................................................................................15~16
DISASSEMBLY.................................................................................................................................................................17~18
1. CABINET and CIRCUIT BOARD DISASSEMBLY..........................................................................................................17
2. MECHANISM ASSY DISASSEMBLY..............................................................................................................................17
EXPLODED VIEW.............................................................................................................................................................19~20
MECHANICAL REPLACEMENT PARTS LIST ................................................................................................................21~23
GLOSSARY.............................................................................................................................................................................24
THE DIFFERENCES OF CD-R/CD-RW DISCS AND GENERAL CD-ROM.....................................................................25~29
1. Recording Layer..............................................................................................................................................................25
2. Disc Specification............................................................................................................................................................25
3. Disc Materials..................................................................................................................................................................26
4. Reading Process of Optical Disc.....................................................................................................................................27
5. Writing Process of CD-R Disc .........................................................................................................................................28
6. Writing Process of CD-RW Disc......................................................................................................................................28
7. Organization of the PCA, PMA and Lead-in Area ...........................................................................................................29
8. Function of PCA and PMA area ......................................................................................................................................30
9. OPC and ROPC ..............................................................................................................................................................30
10. Writing Process of DISC................................................................................................................................................31
THE DIFFERENCES OF DVD-R/RW, DVD+R/RW DISCS AND DVD-ROM....................................................................32~40
1. Recording Layer..............................................................................................................................................................32
2. Disc Specification............................................................................................................................................................33
3. Disc Materials..................................................................................................................................................................33
4. Writing Pulse Waveform of DVD+R.................................................................................................................................36
5. Writing Pulse Waveform DVD+RW.................................................................................................................................38
6. Organization of Inner Drive Area, Outer Drive Area, Lead-in Zone and Lead-out Zone .................................................39
LightScribe MEDIA...........................................................................................................................................................41~44
1. LightScribe Media............................................................................................................................................................41
2. Hardware Block Diagram of LightScribe Label Printing...................................................................................................42
3. MD Assy For LightScribe.................................................................................................................................................43
4. Optical Encoder Assy......................................................................................................................................................44
DVD & CD DATA PROCESSING......................................................................................................................................45~48
1. Data Processing Flow......................................................................................................................................................45
2. Copy Protection and Regional Code Management Block ...............................................................................................46
3. About Prevention the DVD-ROm from to be copy...........................................................................................................47
4. About the DVD-ROM Regional Code..............................................................................................................................48
INTERNAL STRUCTURE OF THE PICK-UP....................................................................................................................49~51
1. Block Diagram of the Pick-up..........................................................................................................................................49
2. Pick up Pin Assignment...................................................................................................................................................50
3. Signal detection of the P/U..............................................................................................................................................51
DESCRIPTION OF CIRCUIT.............................................................................................................................................52~56
1. ALPC Circuit....................................................................................................................................................................52
2. Focus/Tracking/Sled Servo Circuit..................................................................................................................................53
3. Spindle Circuit .................................................................................................................................................................55
MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION.............................................................................57~74
TROUBLESHOOTING GUIDE..........................................................................................................................................75~91
BLOCK DIAGRAM............................................................................................................................................................92~94
CIRCUIT DIAGRAM..........................................................................................................................................................95~97
PRINTED CIRCUIT BOARD DIAGRAM.........................................................................................................................98~101
ELECTRICAL REPLACEMENT PARTS LIST......................................................................................................................102
CAUTION - INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAM.

3
INTRODUCTION
GSA-4164B series Design Specfications
This service manual provides a variety of service
information.
I t contains the mechanical structure of the DVD/CD
Rewritable Drive and the electronic circuits in
schematic form. This DVD/CD Rewritable Drive was
manufactured and assembled under our strict quality
control standards and meets or exceeds industry
specifications and standards.
This DVD/CD Rewritable 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 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 DVD/CD Rewritable 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.
Light Scribe
CD-R
CD-RW
DVD-R
DVD-RW
DVD-R DL
DVD+R
DVD+RW
DVD+R DL
DVD-RAM
GWA-4164B
X
40x w
32x w
16x w
6x w
4x w
16x w
8x w
6x w
X
GWA-4166B
O
40x w
32x w
16x w
6x w
4x w
16x w
8x w
6x w
X
GSA-4166B
O
48x w
32x w
16x w
8x w
4x w
16x w
8x w
6x w
5x w
CD-ROM
CD-R
CD-RW
DVD-ROM
DVD-R
DVD-RW
DVD-R DL
DVD+R
DVD+RW
DVD+R DL
DVD-RAM
GWA-4164B
40x
40x
32x
16x
10x
8x
8x
10x
8x
8x
X
GWA-4166B
40x
40x
32x
16x
10x
8x
8x
10x
8x
8x
X
GSA-4166B
48x
48x
32x
16x
16x
8x
8x
16x
8x
8x
5x
•Write
•Read

4
FEATURES
1 General
1) Enhanced IDE (ATAPI) interface.
2) Internal Half-height Drive.
3) CD-R/RW, DVD-R/RW/+R/+R DL(Double Layer)/+RW 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 : 100,000 POH
8) Vertical and Horizontal installable.
9) Support LightScribe Direct Label Printing Technology
2. Supported disc formats
1) Reads data in each CD-ROM, CD-ROM XA, CD-I, Video CD, CD-Extra and CD-Text.
2) Reads data in Photo CD (Single and Multi session).
3) Reads 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”.
6) Reads data in each DVD-ROM, DVD-R(Ver.1.0, Ver.2.0 for Authoring).
7) Reads and writes in each DVD-R(Ver.2.0 for General), DVD-RW, DVD+R, DVD+R DL, DVD-R DL and
DVD+RW.
8) LightScribe DVD+R conforming to “LightScribe Media Specification”
9) LightScrive CD-R conforming to “LightScribe Media Specification”
3. Supported write method
1) CD-R/RW : Disc at once, Session at Once, Track at once and Packet Write.
2) DVD-R : 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(Double Layer)/DVD-R DL(Dual Layer) : Sequential Recording
6) DVD+RW : Random Write
7) 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 : GWA-4164B
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+RW: 4.7GB
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)
2.4 RPC (Regional Playback Control) Phase2, No Region
* 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)