B/L

wire

 

 

open

Without backlight

 

 

 

 

B/L

shut B/L

shutdown

 

down

sometime

 

 

F/M

 

in

F/M

B/L

,white,batck

Rotundity

or

 

wirelike

Operation abnormal or systemic noise

Short bitween lamp housing and wire, Because consume power too much

F/M in B/L unit

Failure

Mode

 

 

 

 

Part

Name

Description

Phenomena

Failure cause

 

 

Brightness

at

 

 

Light

bottom

of LCM

unit badness

 

 

 

 

B/L

 

leakage

brighter

than

 

normal

Mechanical

B/L brightness

or B/L UniformitySheet in B/L unit is uneven asymmetric

Lack

screw or

*Lack

screw

Mount hole

 

 

 

screw

damage

Screw

damage

55

Page 55
Image 55
Haier HL42XR1 service manual B/L unit, Part Name Description Phenomena Failure cause, Screw