4. If the voltage is more than
+
11.0 V dc, measure the
resistance between battery terminals 3 and 4. The
resistance must be 4 to 30 K ohm.
If the resistance is not correct, replace the battery
pack. If the resistance is correct, replace the DC/DC
card. If the problem persists, replace the system
board.
Checking the Backup Battery
1. Power off the computer and unplug the AC Adapter
from the computer.
2. Turn the computer upside down.
3. Remove the DIMM cover and backup battery (see
“1010 Backup Battery” on page 60).
4. Measure the voltage of the backup battery. See the
following figure.
If the voltage is correct, replace the system board.
If the voltage is not correct, replace the backup
battery.
If the backup battery discharges quickly after
replacement, replace the system board.
Wire
Voltage (V dc)
Red
+
2.5 to
+
3.7
Black
Ground
Status Indicator Checkout
If an LED problem occurs, do the following:
1. Power off the computer.
2. Power on the computer.
3. All the LEDs in the indicator panel should turn on for
a moment after the computer is powered on. Make
sure they turn on.
If the problems persists, replace the system board.
System Board Checkout
The processing functions are performed by the system
board. When a numeric code calls the system board as a
FRU, use the following procedure to isolate the problem:
32
IBM ThinkPad 560X (2640-60x, 70x) HMM
Summary of Contents for ThinkPad 560X
Page 2: ......
Page 8: ...vi IBM ThinkPad 560X 2640 60x 70x HMM...
Page 10: ...viii IBM ThinkPad 560X 2640 60x 70x HMM...
Page 28: ...18 IBM ThinkPad 560X 2640 60x 70x HMM...
Page 72: ...1030 Battery Pack Turn the computer upside down 62 IBM ThinkPad 560X 2640 60x 70x HMM...
Page 74: ...64 IBM ThinkPad 560X 2640 60x 70x HMM...
Page 92: ...82 IBM ThinkPad 560X 2640 60x 70x HMM...
Page 94: ...84 IBM ThinkPad 560X 2640 60x 70x HMM...
Page 98: ...Parts Listing 560X 2640 60x 70x 88 IBM ThinkPad 560X 2640 60x 70x HMM...
Page 110: ...IBM Part Number 05L1768 Printed in U S A S 5L 1768...