4.6.2"Vertical line/Vertical bar" failure analysis procedure
LOGIC board – ABUS
board signal cable has
abnormal appearance?
Y
Y
N
N
Panel address has open circuit or
ADM IC chip is defective.
(Panel is defective.)
End of analysis
Y
Y
N
Vertical bar appears
like following figure
LOGIC, ABUSC (D) board or Signal
cable is defective.
Or loose contact of CN02 (LOGIC) or
CN05 (ABUSC)
Y
N
Heat-melted junction is defective
Tap lightly heat seal portion on ADM flexible cable
Any
changes?
Turn off AC power
Vertical line/Vertical bar
ADM is defective
(Panel is defective.)
ADM flexible cable
has abnormal
appearance?
Turn on PDP
Signal cable is defective
One vertical line ?
Analysis is over
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
42
TROUBLESHOOTING THE 50AF1 PANEL
ADM (Connector with COF attached)
COF
COF
COF (Chip on Film)
Connector to ABUS PWB
COF
COF
Ripped, torn, bent, unseated?
Ripped, torn, bent, unseated?
ADM contains (COF)
ADM IC is the (COF)
(Panel is defective.)
(1)
