Sanyo MCO-19M Service Manual page 29

2. MENU key
Press MENU key to display MENU or to activate MENU operations.
<Automatic elimination of MENU key>
When MENU key is displayed and there is no key operation for 1 minute, MENU key is automatically eliminated
from the display.
<Renewal of display>
When MENU key is not displayed, the display is renewal once for an hour.
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