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Note: The signal lines not used in these steps,
terminals 2 and 3, are used for communication
between the system and the battery.
3. If the voltage is less than +10.0 V dc, the battery has
been discharged or is defective. Recharge the
battery.
If the voltage is still less than +10.0 V dc after the
recharging, replace the battery.
Checking the Standby Battery: Before
performing the following steps, make sure that the standby
battery is fully charged by leaving the computer plugged
into ac power while on or in suspend mode for 24 hours.
The computer can be used normally while the standby
battery is charging. If any problem is not corrected after
charging the standby battery, perform the following steps.
1. Power-off the computer and unplug the AC adapter
from the computer.
2. Remove the battery.
3. Remove the top system board.
4. Replace the standby battery from the bottom of the
top system board.
5. Reinstall the top system board.
6. Plug the computer into ac power, power-on the
computer, and let the standby battery charge for 24
hours.
7. To verify standby battery operation, remove and
reinstall the battery while the computer is in the
suspend mode.
Note: For this test to be valid, the battery should
reinstalled within 1 minute.
The resume operation should start.
8. If the resume operation does not work, replace the
top system board.
Infrared Transceiver Checkout
The infrared transceiver is located on the inverter card in
the ThinkPad 701C/701CS. When you run diagnostics on
the infrared transceiver, the test is actually checking the
top system board, not the infrared transceiver itself.
Therefore, complete the following steps before running
diagnostics or replacing any FRUs.
ThinkPad 701C/701CS (2630)
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