E-18 Some Areas Of Machine Monitor Screen Are Not Displayed - Komatsu PC88MR-10 Shop Manual

40 Troubleshooting
Troubleshooting of electrical system (E-mode)

E-18 Some areas of machine monitor screen are not displayed

A-Z0-A)
Some areas of machine monitor screen are not displayed.
Failure
Liquid crystal panels sometimes allow, as one of their properties, presence of black spots
(spots that are not lit up) and bright spots (spots that remain constantly lit) on panel. If the
Related
number of bright spots and black spots does not exceed 10, liquid crystal panel is not
information
faulty or defective.
No. Cause
Defective machine
monitor
1
(Liquid crystal panel)
Defective machine
monitor
2
(Monitor itself)
40-406
Procedure, measuring location, criteria, and remarks
a Turn starting switch to ON position, then perform troubleshooting.
If following switch operation lights up all pixel on liquid crystal panel (entire
screen turns to white), liquid crystal panel is normal.
Operation of switches: [4] and [F2] (Press simultaneously)
If no failure is found by check on Cause 1, machine monitor may be defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
(PC88MR-FFC-400-
PC88MR-10