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SECTION 503-603-101
B.
Battery
(6)
Replace
the
memory
by engaging
the
dial
connector
first.
The
dial
connectors
are
6.03
The KS-20390L2
and
L4 batteries
are
not
keyed,
one position
is filled
and should fit over
completely
interchangeable.
The
List
2
the vacant
position
in the row of pins.
The flat
battery
may
be used in both
sets
but the
List 4
power
supply
cable
should
not be twisted.
It
battery
should
only
be
used
in
the
2872A2M
should
form
a loop as shown
in Fig. 5 when
telephone
set.
Either
battery
has an expected
life
connected
to the board.
of about
4 years.
It can be replaced
without
loss
of memory
provided
that
commercial
ac power
to
(7) Reassemble
set.
the
set
is continuously
maintained.
To replace
the battery,
proceed
as follows
(Fig. 7).
(8) SReconnect
battery
and power
unit.
(1) Tilt the front
of the
set up.
(9)
Test per paragraph
3.07.
(2) Unplug
the battery.
(10)
Reprogram
memory,
see Part
5.0
(3) Loosen captive
screw on the battery
support.
D.
Dial
(4) Remove
battery
support.
6.05
To replace.
(5) Remove
battery.
(1) 0Disconnect
power
unit
from
ac outlet
and
unplug
battery.
(6)
Install
new battery.
Note:
Removal
of ac
and
battery
power
(7)
When
battery
has
been
connected
at least
results
in the
loss of stored
numbersAI
five
minutes,
check
memory
retention
by
momentarily
disconnecting
ac power
and
then
(2)
Proceed
per paragraph
3.17.
automatically
dialing
a known telephone
number.
(3)
Loosen
the four captive
mounting
screws
of
the memory
(Fig.
4).
C.
Memory
(4)
Gently
raise
the
left
side
of the
memory
and rotate
to position
shown in Fig. 5. This
6.04
The memory
may be replaced
in the following
will expose
10-position
dial
connector.
manner.
(5) Carefully
disengage
the
dial
connector
by
(1) IbDisconnect
power
unit from
ac outlet
and
pulling
on it perpendicular
to the
printed
unplug
battery,
wiring
board.
Note:
Removal
of the
memory
or ac and
(6) Lift
the dial out.
battery
power results
in loss of stored telephone
numbers.0
(7)
To install
a new dial,
reverse
the previous
steps.
The connectors
are
keyed
to orient
(2) Remove
the faceplate
(paragraph
3.19).
them
relative
to the pins.
Observe
the correct
orientation
and do not force the
connection.
(3) Loosen
the
four captive
memory
mounting
screws
(Fig. 4).
(8) SReconnect
battery
and power
unit.
(4) Rotate
the left edge of the memory
upward
(9)
Reprogram
memory,
see Part
5.1
as shown
in Fig. 5.
(5) Disengage
the two connectors
by pulling
on
E.
6-Button Line Key
them
perpendicular
to
the
printed
wiring
board.
6.06
To replace.
Page 22
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