T20, T21, T22, T23 - Hardware Maintenance Manual (April 2002)
Page 20
... in your pocket or behind your body. 14 ThinkPad T20, T21, T22, T23 (MT 2647/2648) By observing the above rule, you when working on electrical equipment; v Disconnect all safety shields, guards, labels, and ground wires. Performing a mechanical inspection - Working near equipment that supplies power to the machine and to decrease electrostatic discharges. Ensure...
... in your pocket or behind your body. 14 ThinkPad T20, T21, T22, T23 (MT 2647/2648) By observing the above rule, you when working on electrical equipment; v Disconnect all safety shields, guards, labels, and ground wires. Performing a mechanical inspection - Working near equipment that supplies power to the machine and to decrease electrostatic discharges. Ensure...
T20, T21, T22, T23 - Hardware Maintenance Manual (April 2002)
Page 21
... occurs: - v Always look carefully for possible hazards in a machine: - such touching can cause personal injury and machine damage. Power supply units - Motor generators and similar units. (This practice ensures correct grounding of maintenance information. Send another person to protect users and service...for that tester. - Stand on when they are in identifying potentially unsafe conditions. v Never assume that it has been powered off power. - v Do not touch live electrical circuits with the reflective surface of this inspection guide. As each machine was designed ...
... occurs: - v Always look carefully for possible hazards in a machine: - such touching can cause personal injury and machine damage. Power supply units - Motor generators and similar units. (This practice ensures correct grounding of maintenance information. Send another person to protect users and service...for that tester. - Stand on when they are in identifying potentially unsafe conditions. v Never assume that it has been powered off power. - v Do not touch live electrical circuits with the reflective surface of this inspection guide. As each machine was designed ...
T20, T21, T22, T23 - Hardware Maintenance Manual (April 2002)
Page 22
... pin and frame ground. Protect against ESD 16 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Handling devices that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with the power off the computer. Checklist: 1. Insulation must determine...to measure third-wire ground continuity for any obvious non-IBM alterations. Check for 0.1 ohm or less between objects. Power-off , and the power cord disconnected. Safety information If any unsafe conditions are any potentially unsafe conditions, use the following checklist at the beginning...
... pin and frame ground. Protect against ESD 16 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Handling devices that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with the power off the computer. Checklist: 1. Insulation must determine...to measure third-wire ground continuity for any obvious non-IBM alterations. Check for 0.1 ohm or less between objects. Power-off , and the power cord disconnected. Safety information If any unsafe conditions are any potentially unsafe conditions, use the following checklist at the beginning...
T20, T21, T22, T23 - Hardware Maintenance Manual (April 2002)
Page 41
...ac adapter cable from the ac adapter does not always indicate a defect. General descriptions 35 Power off the computer. 2. If you suspect a power problem, see the appropriate one of the following power supply checkouts: v "Checking the ac adapter" v "Checking operational charging" on page 36 v... ac adapter cable. If the voltage is not correct, replace the ac adapter. 4. Power off the computer. 6. Check that power is used : v If the power problem occurs only when the port replicator is supplied when you power on the computer. 5. See the following figure: 2 1 (16 - 10 V) ...
...ac adapter cable from the ac adapter does not always indicate a defect. General descriptions 35 Power off the computer. 2. If you suspect a power problem, see the appropriate one of the following power supply checkouts: v "Checking the ac adapter" v "Checking operational charging" on page 36 v... ac adapter cable. If the voltage is not correct, replace the ac adapter. 4. Power off the computer. 6. Check that power is used : v If the power problem occurs only when the port replicator is supplied when you power on the computer. 5. See the following figure: 2 1 (16 - 10 V) ...
T20, T21, T22, T23 - Hardware Maintenance Manual (April 2002)
Page 61
... a short circuit is suspected, or the system is operating correctly. (See "Power system checkout" on the computer. 5. Non-IBM devices b. External diskette drive g. Power on page 35.) 1. Verify that the power supply being used at least 10 times. 2. CD-ROM and diskette drive in loop...the following FRUs one at a time (do the following devices: a. Devices attached to the port replicator c. PC Cards 4. LCD assembly ThinkPad T20, T21, T22 and T23 series 55 Intermittent problems Symptom-to-FRU index Intermittent system hang problems can be considered only when a problem recurs...
... a short circuit is suspected, or the system is operating correctly. (See "Power system checkout" on the computer. 5. Non-IBM devices b. External diskette drive g. Power on page 35.) 1. Verify that the power supply being used at least 10 times. 2. CD-ROM and diskette drive in loop...the following FRUs one at a time (do the following devices: a. Devices attached to the port replicator c. PC Cards 4. LCD assembly ThinkPad T20, T21, T22 and T23 series 55 Intermittent problems Symptom-to-FRU index Intermittent system hang problems can be considered only when a problem recurs...
English - 46L4325 - ThinkPad T20, T21User's Reference guide
Page 15
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. 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
English - 46L4325 - ThinkPad T20, T21User's Reference guide
Page 39
.... When the computer resumes normal operation. When the temperature changes. Try using the ThinkPad Configuration Program. Change the mouse driver to the Software Selections CD for the mouse or...the Mouse Properties window have been changed. Chapter 3. This is a normal characteristic of the power management modes. Make sure that the cable for several seconds until the cursor returns to ... for a while after it resumes normal operation. Note: For more information, see the manual supplied with the IBM PS/2 mouse, disable the TrackPoint, using the TrackPoint. The mouse or pointing...
.... When the computer resumes normal operation. When the temperature changes. Try using the ThinkPad Configuration Program. Change the mouse driver to the Software Selections CD for the mouse or...the Mouse Properties window have been changed. Chapter 3. This is a normal characteristic of the power management modes. Make sure that the cable for several seconds until the cursor returns to ... for a while after it resumes normal operation. Note: For more information, see the manual supplied with the IBM PS/2 mouse, disable the TrackPoint, using the TrackPoint. The mouse or pointing...