1 Precautions
1 Precautions
Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock.
1-1 Safety Precautions
1-1-1 Warnings
1. For continued safety, do not attempt to modify the
circuit board.
2. Disconnect the AC power and DC Power Jack before
servicing.
1-1-2 Servicing the LCD Monitor
1. When servicing the LCD Monitor Disconnect the AC
line cord from the AC outlet.
2. It is essential that service technicians have an accurate
voltage meter available at all times. Check the
calibration of this meter periodically.
1-1-3 Fire and Shock Hazard
Before returning the monitor to the user, perform theFigure 1-1. Leakage Current Test Circuit
following safety checks:
1. Inspect each lead dress to make certain that the leads1-1-4 Product Safety Notices
are not pinched or that hardware is not lodged between
the chassis and other metal parts in the monitor.Some electrical and mechanical parts have special
2. Inspect all protective devices such as nonmetallicsafety-related characteristics which are often not evident
control knobs, insulating materials, cabinet backs,from visual inspection. The protection they give may not
be obtained by replacing them with components rated for
adjustment and compartment covers or shields,
isolation resistor-capacitor networks, mechanicalhigher voltage, wattage, etc. Parts that have special safety
insulators, etc.characteristics are identified by on schematics and parts
lists. A substitute replacement that does not have the same
3. Leakage Current Hot Check (Figure 1-1):
safety characteristics as the recommended replacement part
WARNING: Do not use an isolation might create shock, fire and/or other hazards. Product
transformer during safety is under review continuously and new instructions
this test.are issued whenever appropriate.
Use a leakage current tester or a metering system that
complies with American National Standards Institute
(ANSI C101.1, Leakage Current for Appliances), and
Underwriters Laboratories (UL Publication UL1410,
59.7).
1-1 |
ACEC
