Steren REC-835, Instruction Manual

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SET DISK FORMAT
Press and hold MENU key more than three seconds, Use / key and
select Disk format, press / key to confirm.
Select Yes to format disk. Remember that all stored data will be erased.
SET CONTRAST
Press and hold MENU key more than three seconds, Use / key and
select Contrast, press / key to confirm. Use / keys to adjust.
CHECK MEMORY INFO.
Press and hold MENU key more than three seconds, Use / key and
select Memory info., press / key to confirm. This will show used internal
and external memory.
CHECK FIRMWARE VERSION
Press and hold MENU key more than three seconds, Use / key and
select FIRMWARE VERSION, press / key to confirm. The installed
firmware version will be shown.
SET KEY TONE
Press and hold MENU key more than three seconds, use / key and
select Key Tone, press / key to confirm.