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.............................................................................................13~18
THE DIFFERENCES OF CD-R/CD-RW DISCS AND GENERAL CD-ROM .......................................................19
1. Recording Layer...........................................................................................................................................19
2. Disc Specification.........................................................................................................................................19
3. Disc Materials...............................................................................................................................................20
4. Reading Process of Optical Disc..................................................................................................................21
5. Writing Process of CD-R Disc ......................................................................................................................22
6. Writing Process of CD-RW Disc...................................................................................................................22
7. Organization of the PCA, PMA and Lead-in Area ........................................................................................23
8. Function of PCA and PMA area ...................................................................................................................24
9. OPC and ROPC ...........................................................................................................................................24
10. Writing Process of DISC ............................................................................................................................25
11. Super link ...................................................................................................................................................26
12. Zone CLV Recording..................................................................................................................................26
13. Optimum record speed...............................................................................................................................26
DVD & CD DATA PROCESSING..................................................................................................................27~30
1. Data Processing Flow ..................................................................................................................................27
2. Copy Protection and Regional Code Management Block ............................................................................28
3. About Prevention the DVD-ROm from to be copy........................................................................................29
4. About the DVD-ROM Regional Code...........................................................................................................30
INTERNAL STRUCTURE OF THE PICK-UP................................................................................................31~33
1. Block Diagram of the Pick-up.......................................................................................................................31
2. Pick up Pin Assignment ...............................................................................................................................32
3. Signal detection of the P/U...........................................................................................................................33
DESCRIPTION OF CIRCUIT .........................................................................................................................34~36
1. ALPC Circuit.................................................................................................................................................34
2. Focus/Tracking/Sled Servo Circuit...............................................................................................................35
3. Spindle Servo Circuit....................................................................................................................................36
MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION .........................................................37~54
TROUBLESHOOTING GUIDE ......................................................................................................................55~72
BLOCK DIAGRAM ..............................................................................................................................................74
CIRCUIT DIAGRAM ......................................................................................................................................75~77
PRINTED CIRCUIT BOARD DIAGRAM .......................................................................................................78~81
ELECTRICAL REPLACEMENT PARTS LIST ....................................................................................................82
CAUTION - INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAM.
