1 Precautions
1-1
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 the
following safety checks:
1.
Inspect each lead dress to make certain that the leads
are not pinched or that hardware is not lodged between
the chassis and other metal parts in the monitor.
2.
Inspect all protective devices such as nonmetallic
control knobs, insulating materials, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacitor networks, mechanical
insulators, etc.
3.
Leakage Current Hot Check (Figure 1-1):
WARNING: Do not use an isolation
transformer during
this test.
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
).
Figure 1-1. Leakage Current Test Circuit
1-1-4 Product Safety Notices
Some electrical and mechanical parts have special
safety-related characteristics which are often not evident
from visual inspection. The protection they give may not
be obtained by replacing them with components rated for
higher voltage, wattage, etc. Parts that have special safety
characteristics are identified by on schematics and parts
lists. A substitute replacement that does not have the same
safety characteristics as the recommended replacement part
might create shock, fire and/or other hazards. Product
safety is under review continuously and new instructions
are issued whenever appropriate.
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
Summary of Contents for LE40N87BDX
Page 13: ...2 Product Specifications 2 8 Memo...
Page 37: ...11 Disassembly and Reassembly 11 6 Memo...
Page 41: ...4 Troubleshooting 4 4 WAVEFORMS 1 R G B Output Signal of IC2001...
Page 43: ...4 Troubleshooting 4 6 2 Digital Output Data of IC4001 3 Signal of HDMI Data...
Page 45: ...4 Troubleshooting 4 8 WAVEFORMS 4 Tuner_CVBS Output Signal 3 CVBS Output Signal...
Page 47: ...4 Troubleshooting 4 10 WAVEFORMS 4 CVBS Output Signal...
Page 49: ...4 Troubleshooting 4 12 2 Digital Output Data of IC2001 5 Analog Signal Y C to IC2001 WAVEFORMS...
Page 67: ...3 Alignments and Adjustments 3 16 Memo...
Page 69: ...7 Block Diagrams 7 2 Memo...
Page 71: ...12 PCB Diagram 12 2 12 2 IP Board Diagram 37...
Page 72: ...12 PCB Diagram 12 3 12 3 IP Board Diagram 40...
Page 73: ...12 PCB Diagram 12 4 12 4 IP Board Diagram 46...
Page 74: ...12 PCB Diagram 12 5 12 5 IP Board Diagram 52...
Page 75: ...12 PCB Diagram 12 6 Memo...
Page 81: ...8 Wiring Diagrams 8 6 8 4 Power Board Layout...
Page 84: ...8 9 8 Wiring Diagrams...
Page 87: ...8 Wiring Diagrams 8 12 Memo...
Page 122: ...13 Circuit Descriptions 13 3 13 2 Main Block...
Page 123: ...13 Circuit Descriptions 13 4 13 3 IP Board...
Page 129: ...10 Operating Instructions and Installation 10 6 Memo...
Page 137: ...14 Reference Infomation 14 8 14 3 2 Supported Modes 1...
Page 138: ...14 Reference Infomation 14 9 14 3 3 Supported Modes 2...
Page 139: ...14 Reference Infomation 14 10 14 3 4 Supported Modes 3...
Page 150: ...Memo 1 Precautions 1 4...