5
Electrical safety
Observe the following rules when working on electrical equipment.
Important
Use only approved tools and test equipment. Some hand tools have handles covered with a soft
material that does not insulate you when working with live electrical currents.
Many customers have, near their equipment, rubber floor mats that contain small conductive
fibers to decrease electrostatic discharges. Do not use this type of mat to protect yourself from
electrical shock.
· Find the room emergency power-off switch, disconnecting switch, or electrical outlet. If an electrical outlet.
If an electrical accident occurs, you can then operate the switch or unplug the power cord quickly.
· Do not work alone under hazardous conditions or near equipment that has hazardous voltages.
· Disconnect all power before
1. Performing a mechanical inspection
2. Working near power supplies
3. Removing or installing main units
· Before you start to work on the machine, unplug the power cord. If you cannot unplug it, ask the customer
to power-off the wall box that supplies power to the machine and to lock the wall box in the off position.
· If you need to work on a machine that has exposed electrical circuits, observe the following precautions :
Ensure that another person, familiar with the power-off controls, is near you.
Caution
Another person must be there to switch off the power, if necessary.
· Use only one hand when working with powered-on electrical equipment. Keep the other hand in your
pocket or behind your back
Caution
An electrical shock can occur only when there is a complete circuit. By observing the above rule,
you may prevent a current from through your body.
· When using testers, set the controls correctly and use the approved probe leads and accessories for that
tester
Ch1. Service information
Summary of Contents for P1
Page 2: ...0 Service Manual S1 P1 LG Electronics ...
Page 21: ...19 System Block Diagram Ch3 System information ...
Page 59: ...57 2 Pull the HDD Assy out in the direction shown below Ch5 Removing and replacing a part ...
Page 63: ...61 3 Disconnect the keyboard connector Ch5 Removing and replacing a part ...
Page 65: ...63 Ch5 Removing and replacing a part ...
Page 68: ...66 Ch5 Removing and replacing a part ...
Page 72: ...70 Ch5 Removing and replacing a part ...
Page 77: ...75 4 Remove the Cardbus 5 in 1 Dummy Ch5 Removing and replacing a part ...
Page 79: ...77 Ch5 Removing and replacing a part ...
Page 83: ...81 3 Remove the Main Board Ch5 Removing and replacing a part ...
Page 86: ...84 3 Remove the Audio sub board Ch5 Removing and replacing a part ...
Page 88: ...86 2 Remove the Finger Printer Ch5 Removing and replacing a part ...
Page 90: ...88 2 Remove the Touchpad Ch5 Removing and replacing a part ...
Page 92: ...90 2 Disassemble the LCD Hook located on top of LCD Ch5 Removing and replacing a part ...
Page 97: ...95 Ch5 Removing and replacing a part ...
Page 106: ...Rocky W EXPLODED VIEW 2 NSCRC NBRKH NSCRC NCSNH NHDD1 NLAN1 NCVRC NMEM1 NCVRS ...
Page 113: ...Rocky W EXPLODED VIEW 9 NSCR2 NSCR2 NSCR2 NSCR2 NSUBB NSUBT NSUBF NSUBA NSCR2 ...
Page 118: ...Rocky W EXPLODED VIEW 14 NSCR7 NSCR7 NFAN1 NSCRA NFAN2 NSCR7 NMDM1 NCPU1 NMEM1 ...