Komatsu ecot3 PC300LC-8 Shop Manual page 423

30 Testing and adjusting
Function of checking display of LCD (Liquid
Crystal Display)
While the ordinary screen is displayed, if the follow-
ing numeral input switch and function switch are
operated as follows, all the LCD (Liquid Crystal Dis-
play) lights up in white.
Operation of switches (simultaneous): [4] + [F2]
q
a When finishing the operation of the switches,
release [F2] first.
a If there is a display error in the LCD, only that
part is indicated in black.
a The LCD panel sometimes has black points
(points which are not lighted) and bright points
(points which do not go off) for the reason of its
characteristics. If the number of the bright
points and black points does not exceed 10,
those points are not a failure or a defect.
a To return to the former screen, press the func-
tion switch.
PC300, 350-8
Function of checking service meter
To check the service meter while the starting switch
is turned OFF, operate the numeral input switches
as follows. At this time, only the service meter sec-
tion displays.
Operation of switches (simultaneous): [4] + [1]
q
a Since there is some time lag in start of the
LCD, hold down the switches until the LCD dis-
plays normally.
a After the machine monitor is used continu-
ously, blue points (points which do not go off)
may be seen on this screen. This phenomenon
does not indicate a failure or a defect.
SEN02626-04
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