Hitachi P50H401/DW3-U Service Manual page 134

TROUBLESHOOTING THE 50AE1 PANEL
4.6.2 "Vertical line/Vertical bar" Problem analysis procedure
Vertical line/Vertical bar
LOGIC board – ABUS
board signal cable has
abnormal appearance?
N
ADM flexible
cable has
abnormal
N
Turn Set On
One vertical
line？
N
Left 4/10 of the screen
does not light?
N
Right 4/10 of the
screen does not light?
N
Right 6/10 of the
screen does not light?
N
2/10 of the screen at
the center does not
N
Left 5/10 of the screen
does not light?
N
Right 5/10 of the screen
does not light?
N
(1)
Y
ADM (Connector with COF attached)
Y
Y
Tap lightly heat seal portion on ADM flexible cable.
Y
Any
changes?
N
Y
Y
Va(65V) exists on
RL41(resistor)on
ABUSL board?
N
Y
Y
Y
Y
ADM is defective (Panel is defective.)
Heat-melted junction is defective. (Panel Defective)
Panel address has open circuit or
ADM IC chip is defective.(Panel is defective.)
LOGIC,ABUSR board or Signal cable is defective.
Or loose contact of CN3 (LOGIC) or CNR1 (ABUSR)
Y
LOGIC, ABUSL or Signal cable is defective.
Or loose contact of CN3(LOGIC) or CNL1(ABUSL)
Power cable (CN52 to CN47) is defective
or Loose contact of CN47 (ABUSR)
Loose contact of CNR3 (ABUSR) or CNC2 (ABUSL)
Loose contact of CNR3 (ABUSR) or CNC2 (ABUSL)
Loose contact of CNR3 (ABUSR) or CNC2 (ABUSL)
Turn off the AC power, End of analysis
132
Signal cable is defective
ABUCS is defective