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Preventing erroneous menu display operations (Key lock function)
Menu display key entry can be made unacceptable. This function is
called the key lock function.
The key lock function can be set/reset using this procedure:
Press the
key and the
MARK
"
" will be displayed at the top left corner of the screen to
indicate that the key lock function has been made valid. When
the key lock function is displayed in white, no menu display key
entry is accepted.
Press the
key and the
MARK
keyhole mark "
disappear to indicate that the key lock function has been made
invalid.
The key lock function is operative only for the main menu and the
FISH FINDER SETTING menu. This function is inoperative for the
CUSTOM/RECORD menu, the
The
RANGE
/
RANGE
SHIFT
Error messages
Undertake the specified remedies if the following error messages are
displayed:
CANNOT BACK UP!
This message indicates that storage of the current data settings has
failed.
Remedy
Please contact your JRC product dealer or the JRC sales or service
representative in your area.
ILLEGAL BACKUP DATA!
This message indicates that since they were incorrect for some reason
during power-on, the loading of the saved previous data settings has
failed.
Remedy
Please contact your JRC product dealer or the JRC sales or service
representative in your area.
DAY/
key together. A white keyhole mark
NIGHT
DAY/
key together once again. The
NIGHT
" at the top left corner of the screen will
key, the
GRAPH
SHIFT
key is locked.
A
key, or the
key.
SCP
MARK
3.OPERATIONS 61
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