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Failure Mode
Part
Name
Description
Mechanlcal
When
Nolse
turn panel,appear
cacophony
Ripple
Connectric circle
B/L off
B/L lose action
B/L dark
B / L b r i g h t n e s s
darker than
normal
B/L
B/L
wire damaged
wire damaged
B/L wire open
Without backlight
B/L shut down
B/L shutdown in
sometime
F/M
F/M
inB/L ,white,balck
Rotundity
or wirelike
Phenomena
- 58 -
Failure cause
Caused
b y M e c h a n i c a
noise of backlight
unit
Causeed by
between
mechanism and
pannel
*Connect
badness
between wire and
electrode
*Connect
b a d n e s s S h o r t
between wire and
electrode
Operation
abnormal
or systemic noise
Operation
abnormal
or systemic noise
S h o r t b i t w e e n
lamp housing and
w i r e , B e c a u s e
consume power
too much
F/M in B/L unit
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