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 K1
Page 1: ...0 Service Manual K1 LG Electronics ...
Page 18: ...17 System Block Diagram Ch3 System information ...
Page 58: ...57 3 Remove HDD using a tag Ch5 Removing and replacing a part ...
Page 59: ...58 Ch5 Removing and replacing a part ...
Page 61: ...60 3 Remove the Memory Ch5 Removing and replacing a part ...
Page 67: ...66 Ch5 Removing and replacing a part ...
Page 69: ...68 3 Disconnect the Connector 4 Remove the Retainer Ch5 Removing and replacing a part ...
Page 73: ...72 2 Disconnect the LVDS Inverter Cable Ch5 Removing and replacing a part ...
Page 74: ...73 3 Remove the Display Module Ch5 Removing and replacing a part ...
Page 77: ...76 4 Remove the Keydeck 5 Disconnect the Touchpad Connector Ch5 Removing and replacing a part ...
Page 78: ...77 6 Disconnect the Power Cable then remove the Keydeck Ch5 Removing and replacing a part ...
Page 81: ...80 4 Disconnect the MDC Cable Ch5 Removing and replacing a part ...
Page 83: ...82 7 Remove the USB Board Ch5 Removing and replacing a part ...
Page 90: ...K1 Buffalo EXPLODED VIEW 2 NHDDB NCVRH NSCRF NSCRF NSCRF NSCRF NBRKB ...