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INTRODUCTION....................................................................................................................................................3
GENERAL FEATURES .........................................................................................................................................3
SPECIFICATIONS .................................................................................................................................................4
LOCATION OF CUSTOMER CONTROLS............................................................................................................5
DISASSEMBLY .....................................................................................................................................................6
1. CABINET and CIRCUIT BOARD DISASSEMBLY.........................................................................................6
1-1. Bottom Chassis.......................................................................................................................................6
1-2. Front Bezel Assy.....................................................................................................................................6
1-3. Cabinet and Main Circuit Board ..............................................................................................................6
2. MECHANISM ASSY.......................................................................................................................................6
2-1. Base Pick-up Unit Assy ..........................................................................................................................6
EXPLODED VIEW .............................................................................................................................................7~8
MECHANICAL REPLACEMENT PARTS LIST...............................................................................................9~12
INTERNAL STRUCTURE OF THE PICK-UP................................................................................................13~17
1. Structure of the Pick-Up ...............................................................................................................................13
2. Structure of the Photo Diode (CD) ...............................................................................................................15
3. Structure of the Photo Diode (DVD-ROM) ...................................................................................................16
4. Structure of the Photo Diode (DVD-RAM)....................................................................................................17
DESCRIPTION OF CIRCUIT .........................................................................................................................18~29
1. ALPC (Automatic Laser Power Control).......................................................................................................18
2. RF Amplifier Circuit ......................................................................................................................................19
3. Servo Signal.................................................................................................................................................20
4. About DVD-RAM 2.6G, 4.7G Signal ............................................................................................................28
DESCRIPTION OF DATA PROCESSING.....................................................................................................30~33
1. Data Processing Flow ..................................................................................................................................30
2. Copy Protection and Regional Code Management Block ............................................................................31
3. About Prevention the DVD-ROM from to be copy........................................................................................32
4. About the DVD-ROM Regional Code...........................................................................................................33
MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION .........................................................34~43
TROUBLESHOOTING GUIDE ......................................................................................................................44~59
BLOCK DIAGRAM ..............................................................................................................................................60
CIRCUIT DIAGRAM ......................................................................................................................................61~63
PRINTED CIRCUIT BOARD DIAGRAM .......................................................................................................64~67
ELECTRICAL REPLACEMENT PARTS LIST ..............................................................................................68~79
CLASS 1 LASER PRODUCT
CAUTION - VISIBLE AND INVISIBLE LASER RADIATION WHEN OPEN.
DO NOT STARE INTO BEAM OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.
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