Yamaha TX7 Owner's Manual page 5

BACKUP BATTERY
• The TX7
incorporates
a
special lithium
backup
battery
system so
that data
in
memory
is
returned
even
when
power
is
switched OFF.
•
Do
not attempt
to
replace the battery yourself. Refer
this
job
to
your
dealer.
• The backup
battery
should
last
for
approximately 5
years.
We
recommend
replacing the battery
early.
•
All
data
in
the
TX7 memory
will
be
lost
when
the
battery
is
changed. Be
sure
to
save data you wish
to
keep onto
cassette
tape
prior
to replacing
battery.
•
When
the battery voltage
drops
below
2.
3
volts,
the TX7's
LCD
display
will
read
"CHANGE
BATTERY" when
the
power
is
turned
ON.
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