Note:
If
the
battery
pack
becomes
hot,
it
may
not
be
able
to
charge.
Remove
it
from
the
computer
and
leave
it
at
room
temperature
for
a
while.
After
it
cools
down,
reinstall
and
recharge
it.
To
check
the
battery
pack,
do
the
following:
1.
Power
off
the
computer.
2.
Remove
the
battery
pack
and
measure
the
voltage
between
battery
terminals
1
(+)
and
7
(−).
See
the
following
figure:
6(-)
5
4
1(+) 2(+)
3
7(-)
Terminal
Voltage
(V
dc)
1
+
0
to
+
12.6
7
Ground
(−)
3.
If
the
voltage
is
less
than
+11.0
V
dc,
the
battery
pack
has
been
discharged.
Note:
Recharging
will
take
at
least
3
hours,
even
if
the
indicator
does
not
turn
on.
If
the
voltage
is
still
less
than
+11.0
V
dc
after
recharging,
replace
the
battery.
4.
If
the
voltage
is
more
than
+11.0
V
dc,
measure
the
resistance
between
battery
terminals
5
and
7.
The
resistance
must
be
4
to
30
K
.
If
the
resistance
is
not
correct,
replace
the
battery
pack.
If
the
resistance
is
correct,
replace
the
system
board.
Checking
the
backup
battery
Do
the
following:
1.
Power
off
the
computer,
and
unplug
the
ac
adapter
from
it.
2.
Turn
the
computer
upside
down.
3.
Remove
the
battery
pack
(see
“1010
Battery
pack”
on
page
58).
4.
Remove
the
backup
battery
(see
“1120
Backup
battery”
on
page
79).
5.
Measure
the
voltage
of
the
backup
battery.
See
the
following
figure.
Red (+)
Black (-)
Wire
Voltage
(V
dc)
Red
+2.5
to
+3.2
Black
Ground
v
If
the
voltage
is
correct,
replace
the
system
board.
v
If
the
voltage
is
not
correct,
replace
the
backup
battery.
v
If
the
backup
battery
discharges
quickly
after
replacement,
replace
the
system
board.
Checkout
guide
32
MT
ThinkPad
®
ThinkPad
R60,
R60e,
R61,
and
R61i
Summary of Contents for 765002U
Page 2: ......
Page 3: ...ThinkPad R60 R60e R61 and R61i Hardware Maintenance Manual ...
Page 6: ...iv MT ThinkPad ThinkPad R60 R60e R61 and R61i ...
Page 8: ...2 MT ThinkPad ThinkPad R60 R60e R61 and R61i ...
Page 81: ...3 Removing and replacing a FRU ThinkPad R60 R60e R61 and R61i 75 ...
Page 83: ...3 Removing and replacing a FRU ThinkPad R60 R60e R61 and R61i 77 ...
Page 203: ...LCD FRUs 1 3 2 5 6 7 8 9 4 Parts list ThinkPad R60 R60e R61 and R61i 197 ...
