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This protects the battery pack from being over-charged or having a shortened life. Before you perform the following procedure, be sure you have the correct battery pack for this model. 1. Power-off the computer. 2. Remove the battery pack and measure the voltage between battery terminals 2 (+) and 6 (.). See the following figure. 3. If the voltage is less than +7.2 V dc, the battery pack has been discharged or is defective. Recharge the battery. If the recharging does not work, go to Step 5 on page 38 to check the charging circuit. If the voltage is still less than +7.2 V dc after the recharging, replace the battery. 4. If the voltage is more than +7.2 V dc, measure the resistance between battery terminals 4 and 6. The resistance must be 4K ohms to 30K ohms. If the resistance is not correct, replace the battery pack. If the resistance is correct, replace the DC/DC card. ThinkPad 365 (2625) 37 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 . Active interrupts (CD-ROM activity, etc.) Events that cause entering of suspend mode: . Suspend mode is requested by the Fn key (Fn+F4). . The LCD is closed. . The specified time has elapsed from the last operation with the keyboard, mouse, hard disk drive, parallel connector, diskette drive, or the AC Adapter is plugged in. The time is specified by Suspend Timer in the setup program (if enabled). . If the battery condition is low the system enters the Safe Suspend mode and the configuration/setup information is saved. If the battery gets to critical the battery power indicator blinks (amber) and the system goes into the Hibernation mode. Events that cause exiting or resuming of suspend mode: . (Resume) The LCD is opened. . (Resume) Real time clock alarm signaled. . (Resume) Ring indicator (RI) signaled by serial or PCMCIA device. . (Resume) Any keyboard key is pressed. . (Exit) Timer conditions are satisfied to enter hibernation mode. Hibernation Mode: When in hibernation mode, the following occurs: . The system status, RAM, VRAM, and setup data are stored on the hard disk. . The system is powered-off. 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. . PCMCIA Data/FAX Modem . High Speed PCMCIA Data/FAX Modem . 3270 Emulation Credit Card Adapter . 5250 Emulation Credit Card Adapter . Token-Ring 16/4 Credit Card Adapter . Credit Card Adapter for Ethernet ThinkPad 365 (2625) 39 Events that cause entering of hibernation mode: . The hibernation mode is requested by the Fn key (Fn+F12). . Timer conditions are satisfied in suspend mode. . Critical low battery condition. The system first goes into safe suspend mode, then when the battery reaches critical the system goes into the hibernation mode. Event that causes exiting of hibernation mode. . The power-on switch is operated. When power is turned on, the hibernation history of the boot record on the hard disk is recognized and system status is restored from the hard disk to resume operation. Doze Mode: In the Doze mode, the system slows down the central processing unit and the system uses less power. Enable the doze mode in th...

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