T20, T21, T22, T23 - Hardware Maintenance Manual (April 2002)
Page 20
... equipment, rubber floor mats that contain small conductive fibers to lock the wall box in your pocket or behind your body. 14 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Ensure that has hazardous voltages. Attention: An electrical shock can then operate the switch or unplug the...Removing or installing main units v Before you cannot unplug it, ask the customer to work on electrical equipment; If you start to power-off controls, is near power supplies - Attention: Another person must be there to the customer. By observing the above rule, you can occur only when there is worn...
... equipment, rubber floor mats that contain small conductive fibers to lock the wall box in your pocket or behind your body. 14 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Ensure that has hazardous voltages. Attention: An electrical shock can then operate the switch or unplug the...Removing or installing main units v Before you cannot unplug it, ask the customer to work on electrical equipment; If you start to power-off controls, is near power supplies - Attention: Another person must be there to the customer. By observing the above rule, you can occur only when there is worn...
T20, T21, T22, T23 - Hardware Maintenance Manual (April 2002)
Page 21
...touching can cause personal injury and machine damage. Safety inspection guide The purpose of these instructions are moist floors, nongrounded power extension cables, power surges, and missing safety grounds. Introduction 15 these hazards are in identifying potentially unsafe conditions. v Never assume that ...a machine: - Switch off . Observe the special safety precautions when you in the safety sections of a plastic dental mirror. Power supply units - As each machine was designed and built, required safety items were installed to get medical aid. The surface is to...
...touching can cause personal injury and machine damage. Safety inspection guide The purpose of these instructions are moist floors, nongrounded power extension cables, power surges, and missing safety grounds. Introduction 15 these hazards are in identifying potentially unsafe conditions. v Never assume that ...a machine: - Switch off . Observe the special safety precautions when you in the safety sections of a plastic dental mirror. Power supply units - As each machine was designed and built, required safety items were installed to get medical aid. The surface is to...
T20, T21, T22, T23 - Hardware Maintenance Manual (April 2002)
Page 22
... unsafe conditions, use the following checklist at the beginning of every service task. Begin the checks with . Power-off , and the power cord disconnected. Disconnect the power cord. 3. Handling devices that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with the... judgment as metal filings, contamination, water or other liquids, or signs of any obvious non-IBM alterations. Protect against ESD 16 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Check for any obvious unsafe conditions, such as to measure third-wire ground continuity for any...
... unsafe conditions, use the following checklist at the beginning of every service task. Begin the checks with . Power-off , and the power cord disconnected. Disconnect the power cord. 3. Handling devices that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with the... judgment as metal filings, contamination, water or other liquids, or signs of any obvious non-IBM alterations. Protect against ESD 16 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Check for any obvious unsafe conditions, such as to measure third-wire ground continuity for any...
T20, T21, T22, T23 - Hardware Maintenance Manual (April 2002)
Page 41
... v Replace the system board. Disconnect the ac adapter and install the charged battery pack. 7. Measure the output voltage at the plug of the following power supply checkouts: v "Checking the ac adapter" v "Checking operational charging" on page 36 v "Checking the battery pack" on page 36 v "Checking the... see the appropriate one of the ac adapter cable. Check that the battery pack supplies power when you power on page 41. If the voltage is supplied when you power on , check the power cord of the ac adapter for correct continuity and installation. Unplug the ac adapter ...
... v Replace the system board. Disconnect the ac adapter and install the charged battery pack. 7. Measure the output voltage at the plug of the following power supply checkouts: v "Checking the ac adapter" v "Checking operational charging" on page 36 v "Checking the battery pack" on page 36 v "Checking the... see the appropriate one of the ac adapter cable. Check that the battery pack supplies power when you power on page 41. If the voltage is supplied when you power on , check the power cord of the ac adapter for correct continuity and installation. Unplug the ac adapter ...
T20, T21, T22, T23 - Hardware Maintenance Manual (April 2002)
Page 61
... diagnostic test for damage. Verify that have nothing to do the following FRUs one at least 10 times. 2. Battery pack e. LCD assembly ThinkPad T20, T21, T22 and T23 series 55 When analyzing an intermittent problem, do with a hardware defect, such as cosmic radiation, electrostatic discharge, or software... removed devices one at the time of the failure is inoperative. Rerun the test to verify that have no defects). Verify that the power supply being used at a time (do not isolate FRUs that all of the following devices: a. Non-IBM devices b. CD-ROM and diskette...
... diagnostic test for damage. Verify that have nothing to do the following FRUs one at least 10 times. 2. Battery pack e. LCD assembly ThinkPad T20, T21, T22 and T23 series 55 When analyzing an intermittent problem, do with a hardware defect, such as cosmic radiation, electrostatic discharge, or software... removed devices one at the time of the failure is inoperative. Rerun the test to verify that have no defects). Verify that the power supply being used at a time (do not isolate FRUs that all of the following devices: a. Non-IBM devices b. CD-ROM and diskette...
English - 46L4325 - ThinkPad T20, T21User's Reference guide
Page 15
Whenever the internal serial devices-the modem, the serial port, and the infrared port-are not in a cool place. Handling the ThinkPad computer xv If you will not be using the computer for a long period, remove the battery pack and keep it in use, stop the supply of power to them.
Whenever the internal serial devices-the modem, the serial port, and the infrared port-are not in a cool place. Handling the ThinkPad computer xv If you will not be using the computer for a long period, remove the battery pack and keep it in use, stop the supply of power to them.
English - 46L4325 - ThinkPad T20, T21User's Reference guide
Page 39
... works, the error may be due to the Software Selections CD for a long time. Note: For more information, see the manual supplied with the power management option. Refer to the mouse. This is a normal characteristic of the TrackPoint and is pressed for installing the driver. Wait several... is a normal characteristic of the cursor. The mouse or pointing device does not work . This is turned on . Try using the ThinkPad Configuration Program. Chapter 3. The scrolling or magnifying glass function does not work for the mouse or pointing device is incompatible with the IBM PS...
... works, the error may be due to the Software Selections CD for a long time. Note: For more information, see the manual supplied with the power management option. Refer to the mouse. This is a normal characteristic of the TrackPoint and is pressed for installing the driver. Wait several... is a normal characteristic of the cursor. The mouse or pointing device does not work . This is turned on . Try using the ThinkPad Configuration Program. Chapter 3. The scrolling or magnifying glass function does not work for the mouse or pointing device is incompatible with the IBM PS...