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