LG RCT689H Service Manual page 120

ELECTRICAL TROUBLESHOOTING GUIDE
THE DIFFERENCE OF DVD-R/RW, DVD+R/RW DISCS AND DVD-ROM
1. RECORDING LAYER ........................................................................................................................... 5-16
2. DISC SPECIFICATION ......................................................................................................................... 5-17
3. DISC MATERIALS ............................................................................................................................... .5-17
4. ORGANIZATION OF THE INNER DRIVE AREA, OUTER DRIVE AREA,
LEAD-IN ZONE AND LEAD-OUT ZONE .............................................................................................. 5-21
AUTOMATIC OPTICAL POWER SETTING (SET-BASED)
INTERNAL STRUCTURE OF THE PICK-UP
1. BLOCK DIAGRAM OF THE PICK-UP (HOP-7232TL) ......................................................................... 5-25
2. PICK UP PIN ASSIGNMENT ................................................................................................................ 5-26
3. SIGNAL DETECTION OF THE P/U ...................................................................................................... 5-27
DESCRIPTION OF CIRCUIT
1. ALPC (AUTOMATIC LASER POWER CONTROL) CIRCUIT .............................................................. 5-28
2. FOCUS/TRACKING/SLED SERVO CIRCUIT ...................................................................................... 5-29
3. SPINDLE SERVO CIRCUIT ................................................................................................................. 5-30
MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION
1. LIC101 (AN22117A) : FEP(RF) ANALOG SIGNAL PROCESSOR ...................................................... 5-31
2. LIC201 (MN103SC7G) : ENCODER, DECODER & DSP SINGAL PROCESSOR .............................. 5-37
3. LIC301 (BD7776ARFS) : CD-ROM/DVD-ROM 7CH POWER DRIVER ............................................... 5-44
BLOCK DIAGRAM
.................................................................................................................................... 5-45
SECTION 5
RV9 LOADER PART
CONTENTS
.................................................................................... 5-2
................................................................................... 5-25
.................................................................................................................. 5-28
5-1
............................ 5-16
......................................................... 5-24
.................................... 5-31