Haier HL32K, Service Manual

Page: 53 / 54

53
Black
Screen
B/L normal, only
Black screen
display
FIIcker Crosstalk
LCD Vcom imbalance
Abnormal
Color
Only color
abnormal
Capacitance improper bring crosstalk inside LCD
panel
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
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
B/L wire
open
Without backlight Operation abnormal or systemic noise
B/L shut
down
B/L shutdown in
sometime
Short between lamp housing and wire, Because
consume power too much