System Operation Flow - Zenith DVB352 Series Service Manual

2. System operation flow

Power On
1. 8032 initializes SERVO, DSP & RISC registers
2. Write RISC code to SDRAM
3. Reset RISC
Show LOGO
Yes
Tray Closed?
No
Tray Close to Closed position
Judge whether have disc in 5 tray
1. Judge disc type in frse tray
2. Jump to related disc reading procedure
Recieve
OPEN/ CLOSE
Key?
No
1. Execute Pressed Key & IR Key
2. Systemoperati on Routi ne Loop
1. Stop Playback & Open Tray
2. Display tray open message & LOGO
No
Receive
CLOSE Key?
Yes
3-3