48
Flashing
Bright and dark
display alternately
3. Pannel 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
abormal
Capacitance improper bring crosstalk inside LCD
pannel
Circuit
Abnormal
Color
Only color
abnormal
1. Chip lose action
2. IC short or jointion bad
3. Pannel 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
pannel
B/L off
B/L lose action
*Connect badness between wire and
electrode
B/L dark
B/L brightness
darker than normal
*Connect badness
Short between wire and electrode
B/L wire
damaged
B/L wire damaged
Operation abnormal or systemic noise
Summary of Contents for HL22FEP1
Page 13: ...13 ...
Page 43: ...5 8 6 Backlight Backlight adjust the backlight 8 7 Function ...