System Operation Flow - LG DP132 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

3. SYSTEM OPERATION FLOW

YES
NO
Power on
1. MCU initializes SERVO,DSP & RISC registers
2. Write RISC code to SDRAM
3. Reset RISC
Show "HELLO"
Tray closed?
NO
Tray close to closed position
SLED at inner side?
NO
SLED moves to inner position
1. Judge whether have disc and disc type
2. Jump to related disc reading procedure
Recieve OPEN/
CLOSE Key?
NO
1. Execute pressed Key & IR key
2. System operation routine loop
1. Stop playback & open Tray
2. Display tray open message & LOGO
Receive
CLOSE Key?
3-11
YES
YES
YES