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AVR300 SURROUND SOUND RECEIVER
IMPORTANT NOTES
1. Show the software version
Press “DVD” and “SAT” at the same time.
2. Light up all the icon on the VFL
Press “CD” and “TAPE” at the same time.
3. Reset
Press “FM MUTE” and “PRESET/TUNE” at the same time. When VFL shows “Resetl1 REQ?”, press “OK” button.
For CE version, the 9K/10KHz switch should be set to 9KHz and the voltage should be 230V AC.
For UL version, the 9K/10KHz switch should be set to 10KHz and the voltage should be 115V AC.
The 4/8 ohm switch should be set in 4ohm position in all version.
Ground-SW: GROUND.
4. Upgrade MCU software
The software of main CPU P89C669 can be upgraded via RS232. The programming steps are as follows:
• Connect the AVR300 to the computer.
• On AVR300, press the buttons ‘RDS INFO’ and ‘STORE’ at the same time. Then the front panel should display
‘Program Req..:’. Then press ‘OK’ button. Or you can press ‘RDS INFO’ and ‘STORE’ for 3 seconds. Front panel
will then display ‘Program..’. The AVR300 is ready to be programmed.
Note: when the program process is stopped unexpectedly, the program in IC may be erased. You can press these
two buttons for 3 seconds for programming.
• Run the ‘AVR300test.exe’ and click the button ‘Program to CPU’. Select the appropriate COM Port and click the
“Browse…” to load the hex file.
• Then click the button ‘Program’. Upon the upgrade process is completed, a pop window will be shown.
Note: Please try it again if there is error response.
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