Stimmen - 5, Durchschnittliche Bewertung: 4 ( )

Hersteller: IBM Dateigröße: 6.56 mb Dateiname: Unterrichtssprache:

4. Measure the output voltage of the AC Adapter. 5. If the voltage is still not correct, replace the AC Adapter. Note An audible noise from the AC Adapter does not always indicate a defective adapter. ThinkPad 365X, 365XD (2625) 101 Checking Operational Charging: To check operational charging, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer. Perform operational charging. If the battery status indicator does not turn on, remove the battery pack and leave it to return to room temperature. Reinstall the battery pack. If the charge indicator still does not turn on, replace the battery pack. Checking the Battery Pack: Battery charging will not start until the Fuel-Gauge shows that less than 95% of the total power remains; with this condition the battery pack will charge to 100% of its capacity. This protects the battery pack from being overcharged or having a shortened life. Do the following: 1. Power off the computer. 2. Remove the battery pack and measure the voltage between battery terminals 2 (+) and 6 (.). See the following figure: 6 (-) 5 (T) 2 (+) Terminal Voltage (V dc) / Signal 1 — 2 +8 to +13.5 3 — 4 — 5 Thermal 6 Ground (.) Note Signal lines, not used in these steps, are used for communication between the system and the battery. 102 IBM Mobile Systems - ThinkPad HMM Volume 3 3. If the voltage is less than +9.6 V dc, the battery pack has been discharged. Recharge the battery pack. If the voltage is still less than +9.6 V dc after recharging, replace the battery. Note If the voltage of the battery pack is 0 V, it is not defective. 4. If the voltage is more than +9.6 V dc, measure the resistance between battery terminals 5 and 6. The resistance must be 4 K to 30 K ohm. If the resistance is not correct, replace the battery pack. If the resistance is correct, replace the system board. Checking the Backup Battery 1. Power off the computer and unplug the AC Adapter from the computer. 2. Open the keyboard and remove the battery pack. 3. Lift the right-hand section of the black insulator sheet. 4. Locate the backup battery on the system board, shown at .1/. 1 5. Using a plastic tool, remove the backup battery from the system board. DANGER Do not use a metal tool when removing the backup battery. Use only a plastic tool. ThinkPad 365X, 365XD (2625) 103 6. Measure the voltage of the backup battery. Refer to the following table for voltages: Wire Voltage (V dc) + +2.5 to +3.7 . Ground . If the voltage is correct, replace the system board. . If the voltage is not correct, the backup battery has been discharged. Replace the backup battery. . If the backup battery discharges quickly after replacement, replace the system board. Power Management Features Three power management modes are provided by the computer to reduce 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. Events that cause the computer to enter standby mode: . Standby requested by the Fn key. (Fn+F3) . No activity under auto-standby enabled by the ThinkPad Features program. Events that cause the computer to exit or resume standby mode: . (Resume) Any key operation. Suspend Mode: When in suspend mode, the following, in addition to the two actions of standby mode, occur: . The LCD is powered off. . The hard disk is powered off. . The CPU is stopped. Notes 1. In the ThinkPad Features Program, the computer can be set to “Will not suspend even if LCD is closed.” 2. When the computer is powered with ac power and is used with one of the communication PC cards, the computer enters standby mode; the PC card and application program remain active. 3. The computer cannot enter suspend mode while a communication link is running. 104 IBM Mobile Systems - ThinkPad HMM Volume 3 Events that cause the computer to enter 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, or diskette drive; or the AC Adapter is plugged in. The time is specified by Suspend Timerin the ThinkPad Features program. . The battery condition is low. The battery power indicator blinks amber. . Either the PS2 OFF or PS2 SUSpend command is set in the ThinkPad Features program. Events that cause the computer to exit or resume suspend mode: . (Resume) The LCD is opened. . (Resume) The real time clock alarm is signaled. . (Resume) The ring indicator (RI) is signaled by a serial or PCMCIA device. . (Resume) The Fn key is pressed. . (Resume) An external keyboard key is pressed while operating with ac power. . (Exit) Timer (timeout) conditions are satisfied for entering 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. Note The...

Herunterladen

Geben Sie zwei Ziffern: