Service Manual
Model No.:
- 53 -
Failure Mode
Part
Name
Description
Phenomena
Failure cause
Mechanlcal
Nolse
When
turn panel,appear
cacophony
Caused
by M e c h a n i c a
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
b a d n e s s S h o rt
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
Shor t bitwee n
lamp housing and
wire, Becaus e
consume power
too much
F/M
F/M
inB/L ,white,balck
Rotundity
or wirelike
F/M in B/L unit