TABLE OF CONTENTS
INTRODUCTION....................................................................................................................................................3
FEATURES ............................................................................................................................................................3
SPECIFICATIONS .............................................................................................................................................4~5
LOCATION OF CUSTOMER CONTROLS........................................................................................................6~7
DISASSEMBLY .................................................................................................................................................8~9
1. CABINET and CIRCUIT BOARD DISASSEMBLY.........................................................................................8
1-1. Bottom Chassis.........................................................................................................................................8
1-2. Front Bezel Assy.......................................................................................................................................8
1-3. Cabinet and Main Circuit Board ................................................................................................................8
2. MECHANISM ASSY DISASSEMBLY ............................................................................................................8
2-1. Pick-up Unit...............................................................................................................................................8
2-2. Pick-up .....................................................................................................................................................9
GLOSSARY .........................................................................................................................................................10
EXPLODED VIEW .........................................................................................................................................11~12
MECHANICAL REPLACEMENT PARTS LIST.............................................................................................13~14
THE DIFFERENCES OF CD-R/CD-RW DISCS AND GENERAL CD-ROM .......................................................15
1. Recording Layer...........................................................................................................................................15
2. Disc Specification.........................................................................................................................................15
3. Disc Materials...............................................................................................................................................16
4. Reading Process of Optical Disc..................................................................................................................17
5. Writing Process of CD-R Disc ......................................................................................................................18
6. Writing Process of CD-RW Disc...................................................................................................................18
7. Organization of the PCA, PMA and Lead-in Area ........................................................................................19
8. Function of PCA and PMA area ...................................................................................................................20
9. OPC and ROPC ...........................................................................................................................................20
10. Writing Process of DISC ............................................................................................................................21
11. Super link ...................................................................................................................................................22
12. Zone CLV Recording..................................................................................................................................22
13. Optimum record speed...............................................................................................................................22
DVD & CD DATA PROCESSING..................................................................................................................23~26
1. Data Processing Flow ..................................................................................................................................23
2. Copy Protection and Regional Code Management Block ............................................................................24
3. About Prevention the DVD-ROm from to be copy........................................................................................25
4. About the DVD-ROM Regional Code...........................................................................................................26
INTERNAL STRUCTURE OF THE PICK-UP................................................................................................27~29
1. Block Diagram of the Pick-up.......................................................................................................................27
2. Pick up Pin Assignment ...............................................................................................................................28
3. Signal detection of the P/U...........................................................................................................................29
DESCRIPTION OF CIRCUIT .........................................................................................................................30~32
1. ALPC Circuit.................................................................................................................................................30
2. Focus/Tracking/Sled Servo Circuit...............................................................................................................31
3. Spindle Servo Circuit....................................................................................................................................32
MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION .........................................................33~50
TROUBLESHOOTING GUIDE ......................................................................................................................51~68
BLOCK DIAGRAM ..............................................................................................................................................69
CIRCUIT DIAGRAM ......................................................................................................................................70~72
PRINTED CIRCUIT BOARD DIAGRAM .......................................................................................................73~76
ELECTRICAL REPLACEMENT PARTS LIST ....................................................................................................77
CAUTION - INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAM.
