Technical information
Table Of Contents
- Contents
- About this manual
- Introduction
- General descriptions
- ThinkPad R40
- Product overview
- Symptom-to-FRU index
- FRU replacement notices
- Removing and replacing a FRU
- 1010 Battery pack
- 1020 Ultrabay Plus device
- 1030 Hard-disk drive
- 1040 DIMM
- 1050 Mini PCI adapter
- 1060 Keyboard
- 1070 Backup battery
- 1080 Optical storage in the fixed bay
- 1090 PC Card slot assembly
- 1100 Hinge cover
- 1110 Communication daughter card (CDC)
- 1120 Fan assembly
- 1130 CPU
- 1140 Bluetooth antenna assembly
- 1150 LCD assembly
- 1160 Keyboard bezel
- 1170 Speaker assembly and microphone cable
- 1180 System board
- 1190 Hard-disk drive slot
- 2000 Ultrabay Plus guide rail
- 2010 I/O Bracket
- 2020 LCD front bezel
- 2030 Inverter card
- 2040 LCD panel and LCD cable assembly
- 2050 Antenna assembly, hinges, and LCD cover
- Locations
- Parts list
- Notices

2
3
4
5(-)
1(+)
Terminal
Voltage
(V
dc)
1
+
0
to
+
16.8
5
Ground
(−)
3.
If
the
voltage
is
less
than
+14.4
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
+14.4
V
dc
after
recharging,
replace
the
battery.
4.
If
the
voltage
is
more
than
+14.4
V
dc,
measure
the
resistance
between
battery
terminals
4
and
5.
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.
For
machine
type
2684,
2685
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
5
(−).
See
the
following
figure:
2
3
4
5(-)
1(+)
Terminal
Voltage
(V
dc)
1
+
0
to
+
12.6
5
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
4
and
5.
The
resistance
must
be
4
to
30
K
.
Checkout
guide
General
descriptions
41