52
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
Ripple Connectric
circle
Causeed by between mechanism and
Panel
B/L off
B/L lose action
*Connect badness between wire and
electrode
Содержание HL42T
Страница 1: ...1 HL42T TV 8888 125 ...
Страница 8: ...8 3 2 2 Connector definition MTk5380 ...
Страница 12: ...12 3 4 LCD PANEL 3 4 1 Function Description Display the signal 3 4 2 Connector definition ...
Страница 13: ...13 ...
Страница 16: ...16 ...
Страница 17: ...17 ...
Страница 18: ...18 ...
Страница 19: ...19 ...
Страница 22: ...22 Power source Removing the table stand and installing a wall mount bracket ...
Страница 30: ...30 1 Version Info 2 Video 3 Audio ...
Страница 31: ...31 4 Channel 5 Gamma 6 BackLight ...
Страница 32: ...32 7 Function 8 BLOCK DIAGRAM AND CIRCUIT DIAGRAM 8 1 BLOCK DIAGRAM 8 2 CIRCUIT DIAGRAM MTK5380 ...
Страница 48: ...48 ...
Страница 49: ...49 10 TROUBLE SHOOTING GUIDE 10 1 Simple check 10 1 1 LCD is not bright 10 1 2 No picture ...