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59
Abnormal
Display
Abnormal Display
Circuit
Flashing
Bright and dark
display alternately
1. Chip lose action
2. IC Abort or jointing bad
3. Panel and VSC connect bad
Failure Mode
Part Name Description Phenomena
Failure
cause
White
Screen
B/L normal, only
white screen
display
Black
Screen
B/L normal, only
Black screen
display
Maybe caused by surge current and EDS
FIIcker Crosstalk
LCD Vcom imbalance
Abnormal
Color
Only color
abnormal
Capacitance improper bring crosstalk inside LCD
panel
Circuit
Abnormal
Color
Only color
abnormal
1. Chip lose action
2. IC short or joint bad
3. Panel and VSC connect bad
Failure Mode
Part Name Description
Phenomena
Failure
cause
Mechanlcal
Nolse
When turn
panel,appear
cacophony
Caused by Mechanica noise of backlight
unit
Summary of Contents for HL42B-B
Page 8: ...8 3 2 2 Connector definition Main board connector ...
Page 32: ...32 2 Video It include Auto Color and Color Temperature ...
Page 34: ...34 Channel menu includes 5 Function Range Scan Single RF Scan Factory Scan ...
Page 54: ...55 CN4 CN5 J28 10 1 3 No sound ...
Page 60: ...61 Sincere Forever ...