5. To check the charging circuit, do the following. Plug
in the AC Adapter with the battery pack removed,
then power-on the computer.
6. Measure the charging voltage between DC/DC
terminals 2 (+) and 6 (−).
7. If the voltage is less then +9.0 V dc, replace the
DC/DC card. If the voltage is more than +9.0 V dc,
the charging circuit is working correctly, replace the
battery pack.
Power Management Features
Five power management modes are provided by the
computer to save power consumption and prolong battery
power.
Standby Mode: When in standby mode the following
occurs:
The LCD backlight turns off.
The hard disk motor stops.
The CPU clock is set to the lowest speed.
Events that cause entering of standby mode:
Standby requested by the Fn key (Fn+F3).
No activity under auto-standby enabled by the
feature utility.
Events that cause exiting or resuming of standby mode:
(Resume) Any key operation.
Ring wakeup if enabled.
Suspend Mode: When in suspend mode, the
following, in addition to the four actions of standby mode,
occur:
The Audio is powered-off
The CD-ROM is powered off.
The LCD power is powered-off.
The hard disk is powered-off.
The CPU is stopped.
When the computer is powered with AC power and is used
with one of the following IBM PC cards, the computer does
not enter
suspend or hibernate mode
by either the LCD
suspend switch or power-management timeout; the PC
card and application program remain active.
3270 Emulation Credit Card Adapter
5250 Emulation Credit Card Adapter
Token-Ring 16/4 Credit Card Adapter
Credit Card Adapter for Ethernet
IBM Modem
In the following condition, the computer cannot enter the
suspend mode.
While the communication link is running.
38 IBM Mobile Systems - ThinkPad HMM Volume 3