Service Manual
Page 13
Reset RISC Show LOGO YES Tray Closed ? Stop Playback & Open Tray 2. Judge whether have disc and disc type 2. 2. NO Tray Close to SDRAM 3. Execute Pressed Key & IR Key 2. Display tray open message & LOGO YES YES Receive CLOSE Key? 3-3 System operation Routine Loop 1. Write RISC code to Closed position YES SLED at Inner Side ? NO 1. NO SLED Moves to related disc reading procedure YES Recieve OPEN/CLOSE Key? Jump to Inner Position 1. System operation flow Power On 1. 8032 initializes SERVO,DSP & RISC registers 2.
Reset RISC Show LOGO YES Tray Closed ? Stop Playback & Open Tray 2. Judge whether have disc and disc type 2. 2. NO Tray Close to SDRAM 3. Execute Pressed Key & IR Key 2. Display tray open message & LOGO YES YES Receive CLOSE Key? 3-3 System operation Routine Loop 1. Write RISC code to Closed position YES SLED at Inner Side ? NO 1. NO SLED Moves to related disc reading procedure YES Recieve OPEN/CLOSE Key? Jump to Inner Position 1. System operation flow Power On 1. 8032 initializes SERVO,DSP & RISC registers 2.
Service Manual
Page 14
... AC Voltage Power PCBA(110V or 220V) YES NO Replace power PCBA or AC transformer. Connect to PC RS232 Cable and update the FLASH memory code. Check system reset circuit. 3. Check FLASH Memory related circuit. 3-4 YES Are 3.3V and 1.8V DC outputs normal on . 3. YES A NO 1. Check FLASH R/W enable signal PRD...
... AC Voltage Power PCBA(110V or 220V) YES NO Replace power PCBA or AC transformer. Connect to PC RS232 Cable and update the FLASH memory code. Check system reset circuit. 3. Check FLASH Memory related circuit. 3-4 YES Are 3.3V and 1.8V DC outputs normal on . 3. YES A NO 1. Check FLASH R/W enable signal PRD...