Hardware Maintenance Manual
Page 11
... occur only when there is a complete circuit. Stand on suitable rubber mats (obtained locally, if necessary) to switch off (EPO) switch, disconnecting switch, or electrical outlet. Use extreme care when measuring high voltages. v Do not work with very high voltages; Removing or installing main units v Before you when working with live...
... occur only when there is a complete circuit. Stand on suitable rubber mats (obtained locally, if necessary) to switch off (EPO) switch, disconnecting switch, or electrical outlet. Use extreme care when measuring high voltages. v Do not work with very high voltages; Removing or installing main units v Before you when working with live...
Hardware Maintenance Manual
Page 14
...they are all at the same charge. v Wear a grounded wrist strap against ESD damage by a certified electrician. 6 ThinkPad T400 and R400 Hardware Maintenance Manual Proper grounding of the computer is especially useful when handling ESD-sensitive devices. The mat is required ...operator safety and correct system function. v Select a grounding system, such as fully effective. Grounding requirements Electrical grounding of the electrical outlet can use an ESD common ground or reference point. Notes: 1. When working on a double-insulated or battery-operated system, use...
...they are all at the same charge. v Wear a grounded wrist strap against ESD damage by a certified electrician. 6 ThinkPad T400 and R400 Hardware Maintenance Manual Proper grounding of the computer is especially useful when handling ESD-sensitive devices. The mat is required ...operator safety and correct system function. v Select a grounding system, such as fully effective. Grounding requirements Electrical grounding of the electrical outlet can use an ESD common ground or reference point. Notes: 1. When working on a double-insulated or battery-operated system, use...
Hardware Maintenance Manual
Page 17
Safety information 9 DANGER To avoid shock, do as follows before removing it: power off the computer, unplug all power cords from electrical outlets, remove the battery pack, and disconnect any interconnecting cables. DANGER Unless hot swap is allowed for the FRU being replaced, do not remove the plastic cover that protects the lower part of the inverter card. DANGER Though the main batteries have low voltage, a shorted or grounded battery can produce enough current to burn personnel or combustible materials.
Safety information 9 DANGER To avoid shock, do as follows before removing it: power off the computer, unplug all power cords from electrical outlets, remove the battery pack, and disconnect any interconnecting cables. DANGER Unless hot swap is allowed for the FRU being replaced, do not remove the plastic cover that protects the lower part of the inverter card. DANGER Though the main batteries have low voltage, a shorted or grounded battery can produce enough current to burn personnel or combustible materials.
Hardware Maintenance Manual
Page 91
... listed at the top of damaging parts. 2. Be sure to replace a FRU, turn off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any notes that all screws, springs, and other small parts are listed. 4. When turning a ... shaking the computer gently and listening for removing the FRU, as given by using an electrostatic discharge (ESD) strap (P/N 6405959). © Copyright Lenovo 2008, 2009 83 For information about connecting and arranging internal cables, see "Locations" on page 79. 3. An untrained person runs the risk of...
... listed at the top of damaging parts. 2. Be sure to replace a FRU, turn off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any notes that all screws, springs, and other small parts are listed. 4. When turning a ... shaking the computer gently and listening for removing the FRU, as given by using an electrostatic discharge (ESD) strap (P/N 6405959). © Copyright Lenovo 2008, 2009 83 For information about connecting and arranging internal cables, see "Locations" on page 79. 3. An untrained person runs the risk of...