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100mm GRAPHICS RECORDER TECHNICAL MANUAL
HA249875
Issue 1 Jan 99
Section 3
Page 3 - 10
P
P
In a clean area (to class C), remove the rear
cover of the display unit by undoing the two
screws P
19
20
Remove the two securing brackets (R) and
remaining securing screws (S).
21
Disconnect the backlight connector and remove the backlight unit.
DO NOT TOUCH THE REAR FACE OF THE LCD SCREEN - it cannot
easily be cleaned, as most common solvents (e.g. Iso-propyl alcohol)
damage the surface.
Carefully slide the replacement backlighting unit into place, and using a
source of clean pressurised air, or similar, ensure that no dust particles
are present anywhere between the backlight and the LCD screen.
Reconnect the connector and reassemble the display unit.
3.3.5 BACKLIGHT REPLACEMENT PROCEDURE (Cont.)
3.3.6 Reassembly
The re-assembly of the recorder is the opposite of the disassembly procedure given so far.
Hints:
1.
When fitting the door, route the shorter 'flat' flexi through the mechanics first, so that it can act as a guide for the
longer, pre-formed flexi.
2.
When refitting the back plate, the securing lug at the bottom of the back-plate goes under the main 'interconnect'
board.
3.3.7 Offset correction
This ensures that the image is positioned correctly relative to the screen.
At switch-on, continuously hold a finger in contact with the display
screen until the 'calibration display' appears (approximately 30 seconds
after switch on) as depicted in figure 3.3.7.
Using a soft, small diameter item (e.g. a pencil point) which will not
damage the touch screen, touch the intersection of the upper set of
crosshairs, as requested by the display.
Once the top left target has been accepted, continue as requested by the
display. Once the targets have been accepted, initialisation continues as normal.
R
S
S
R
Touch top left target
255
255
Figure 3.3.7 Calibration screen
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