Technická informácia Troubleshooting and Repairing LCD TVs

Contents
Liquid Crystals....6
Liquid Crystal Displays....10
The Power Supply Board....15
The Inverter Board....22
The Main Board....26
The Controller/T-Con Board....34
The LCD Driver Board....35
The Standby Circuit....36
The Liquid Crystal Display In Depth....37
Tools....41
Test Equipment....50
Schematic Diagrams....58
Understanding and Testing Resistors....59
Understanding and Testing Capacitors....63
Understanding and Testing Inductors....73
Understanding and Testing Transistors....77
Understanding and Testing Diodes....90
Understanding and Testing Bridge Rectifiers....103
Understanding and Testing LEDs....110
Understanding and Testing Switching Transformers....113
Understanding and Testing Opto-Isolators....117
Understanding and Testing Voltage Regulators....123
Understanding and Testing Switches....126
Understanding and Testing Fuses....128
Some Testing Tips....131
Useful Formulas....132
How To Disassemble An LCD TV....133
Voltage Test Points....136
The Tap Test....144
Freeze Spray and Hair Dryers....146
Connection Problems....149
PSU (Power Supply Unit) Failures....152
Inverter Board Failures....158
Main Board Failures....163
No Video....169
No Audio....171
OSD/Menu Failure....172
White Screen....173
Rainbow Screen....175
Screen Flashes Then TV Shuts Down....176
No Back light....177
Lines In Picture....178
Cracked Panel....179
LCD TV Repair Case Histories....180
Safety....186
Conclusion....190