To unlock your Sony DAV-DZ175 DVD home theater system, follow these steps:
1. Turn on the System: Ensure that your Sony DAV-DZ175 home theater system is turned on and connected to a power source.
2. Press and Hold Stop Button: Press and hold the "Stop" button on the front panel of your DVD home theater system.
3. Open Disc Tray: While holding the "Stop" button, press the "Open/Close" button to open the disc tray.
4. Enter Unlock Code: A four-digit unlock code will appear on the display screen. Note down this unlock code.
5. Press "Display": Press the "Display" button on the front panel to confirm the unlock code.
6. Close the Disc Tray: After confirming the unlock code, close the disc tray.
7. Wait for Unlocking: The system will start the unlocking process. Please wait until the "Unlock" message disappears from the display screen.
8. Power Cycle the System: Once the unlocking process is complete, power off your system by pressing the "Power" button and then turn it back on.
9. Complete the Setup: Follow the on-screen instructions to complete any necessary setup or settings.
Your Sony DAV-DZ175 DVD home theater system should now be unlocked and ready for use. In case the provided unlock code does not work or if you face any issues, it's recommended to contact Sony customer service or a certified technician for further assistance.