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LC-22LE240
TROUBLESHOOTING
21. TROUBLESHOOTING
21.1. No Backlight Problem
Problem: If TV is working, led is normal and there is no picture and backlight on the panel.
Possible couses: Backlight pin, dimming pin, backlight supply, stby on/off pin
Backlight pin should be high in open position. If it is low, please check Q181 and panel
cables.
Dimming pin should be high or square wave in open position. If it is low, please check
S16 for Mstar side and panel or power cables, connectors.
Backlight power supply should be in panel specs. Please check CN705 for MB62, related
connectors for power supply cards.
Summary of Contents for LC-22LE240E
Page 17: ...17 LC 22LE240 0 1 General Block Diagram 1 General Block Diagram ...
Page 22: ...22 LC 22LE240 2 3 Absolute Ratings 2 3 1 Electrical Characteristics ...
Page 25: ...25 LC 22LE240 3 3 2 Operating Specifications 3 4 Pinning ...
Page 38: ...38 LC 22LE240 Pinning 8 3 Pinning ...
Page 50: ...50 LC 22LE240 18 2 HDMI CN707 CN708 18 3 VGA CN711 ...
Page 52: ...52 LC 22LE240 19 1 Video Settings 19 1 Video Setting 19 2 Audio Settings 19 2 Audio Settings ...
Page 53: ...53 LC 22LE240 19 3 Options 19 3 Options Options 1 Options 1 Options 2 Options 2 ...
Page 74: ...74 LC 22LE240 POWER SUPPLY Diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 I H G F E D C B A ...
Page 75: ...75 LC 22LE240 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 I H G F E D C B A Led Converter Diagram ...