Only those personnel who have received approved safety
and maintenance training may perform this replacement
When opening the cabinet and replacing a unit, be careful
not to touch the high–voltage circuits (marked and fitted
with an insulating cover).
Touching the uncovered high–voltage circuits presents an
extremely dangerous electric shock hazard.
The backlight is a consumable.
This subsection applies to the replacement of the LCD/MDI and separate
Table 2.9.1(a) Specification of LCD/MDI and separate type LCD
Separate type LCD A02B–0166–C251
The 7.2” monochrome LCDs for the LCD/MDI and separate LCD are
products of either Hitachi Ltd. or Sharp Corp. Their backlights differ
depending on the manufacturer. Both types of backlights are provided as
spare parts. Select an appropriate type.
Table 2.9.1(b) Specification of backlight
Spare part specification Backlight specification Manufacture
A02B–0236–K112 A61L–0001–0142#BL Hitachi
(1)Turn off the power to the LCD/MDI or separate LCD, and wait for a
(2)Remove the protection plate from the rear. (4 screws)
(3)Remove the backlight power supply cable from the upper left section
and the LCD cable from the center right section. (See Fig. 2.9.1 (a).)
(4)Remove the printed–circuit board from the rear along with the holding
metal plate. (4 screws)
(5)Remove the LCD. (4 screws)
Backlight of LCD/MDI
or Separate Type LCD