Service Manual
Page 13
Write RISC code to Inner Position 1. NO SLED Moves to SDRAM 3. Judge whether have disc and disc type 2. Jump to Closed position YES SLED at Inner Side ? Execute Pressed Key & IR Key 2. System operation Routine Loop 1. 2. Stop Playback & Open Tray 2. System operation flow Power On 1. 8032 initializes SERVO,DSP & RISC registers 2. NO 1. Reset RISC Show LOGO YES Tray Closed ? NO Tray Close to related disc reading procedure YES Recieve OPEN/CLOSE Key? Display tray open message & LOGO YES YES Receive CLOSE Key? 3-3
Write RISC code to Inner Position 1. NO SLED Moves to SDRAM 3. Judge whether have disc and disc type 2. Jump to Closed position YES SLED at Inner Side ? Execute Pressed Key & IR Key 2. System operation Routine Loop 1. 2. Stop Playback & Open Tray 2. System operation flow Power On 1. 8032 initializes SERVO,DSP & RISC registers 2. NO 1. Reset RISC Show LOGO YES Tray Closed ? NO Tray Close to related disc reading procedure YES Recieve OPEN/CLOSE Key? Display tray open message & LOGO YES YES Receive CLOSE Key? 3-3
Service Manual
Page 14
YES Update FLASH successfully? YES A NO 1. 3. Check system reset circuit. 3. Connect to PC RS232 Cable and update the FLASH memory code. YES Check the regulators or related diodes. Check 27MHz system clock. 2. YES Are 3.3V and 1.8V DC outputs normal on . Check FLASH R/W enable signal PRD,...
YES Update FLASH successfully? YES A NO 1. 3. Check system reset circuit. 3. Connect to PC RS232 Cable and update the FLASH memory code. YES Check the regulators or related diodes. Check 27MHz system clock. 2. YES Are 3.3V and 1.8V DC outputs normal on . Check FLASH R/W enable signal PRD,...