LG HB954TB Service Manual page 96

ELECTRICAL TROUBLESHOOTING GUIDE
1. RESET OR POWER CHECK ................................................................................................................... 4-2
2. SYSTEM CHECK ...................................................................................................................................... 4-3
3. TRAY OPERATING IS ABNORMAL ......................................................................................................... 4-4
4. SLED OPERATING IS ABNORMAL ......................................................................................................... 4-5
5. SPINDLE OPERATING IS ABNORMAL ................................................................................................... 4-6
6. FOCUS ACTUATOR OPERATING IS ABNORMAL ................................................................................. 4-7
7. LASER OPERATING IS ABNORMAL ...................................................................................................... 4-8
HOW TO USE THE BAR-CODE SCAN TOOL
1. BAR-CODE SCAN SYSTEM CONFIGURATION ..................................................................................... 4-9
2. PICK-UP BAR-CODE SCAN TOOL CONFIGURATION. ......................................................................... 4-9
3. RUNNING BAR-CODE SCAN TOOL ..................................................................................................... 4-10
4. BAR-CODE SCAN PROCEDURE .......................................................................................................... 4-11
INTERNAL STRUCTURE OF THE PICK-UP
1. OPTICAL LAYOUT ................................................................................................................................. 4-12
2. SF-BD411 PDIC COMPOSITION ........................................................................................................... 4-13
3. PICK-UP CONNECTOR TERMINAL PIN ASSIGNMENTS .................................................................... 4-14
MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION
1. LIC501 (MT8575) : BLU-RAY SIGNAL PROCESSOR SINGLE CHIP ................................................... 4-15
2. LIC201 (R2A30232SP) : SPINDLE MOTOR AND 6CH ACTUATOR DRIVER ...................................... 4-20
CIRCUIT DIAGRAM
CIRCUIT VOLTAGE CHART
PRINTED CIRCUIT BOARD DIAGRAMS
SECTION 4
HL-04P LOADER PART
CONTENTS
.................................................................................................................................. 4-23
................................................................................................................. 4-25
.................................................................................... 4-2
.................................................................................. 4-9
................................................................................... 4-12
.......................................................................................... 4-27
4-1
.................................... 4-15