Hitachi UX Twin Nozzle, Service Manual

Page: 235 / 355

5-19
5.11 Deflection Base Replacement Procedure
When the LED protection glass is damaged, or when the deflection base gets extremely dirty and its
error cannot be cancelled even after the cleaning, it is necessary to replace the deflection base.
Perform it by following procedure.
１
Depressurize the printer.
２
Remove the head cover and heater cover.
３
Unscrew the nozzle setscrews, the deflection electrode setscrews and the charge electrode feed
screws on the surface of the deflection base.
４
Perform
“5.7 APH board replacement (EZJ135)”,
１
to
４
.
５
Unscrew the high-voltage electrical power lines setscrews, the charge electrode feed screws
and high-voltage GND screws on the rear side of the head base.
The setscrews of the high-voltage electrical power lines are coated with silicone rubber.
Break the coating by a driver or the like and remove the screws.
６
Remove the deflection base setscrews and then remove the deflection base, and replace the
deflection base with a new one.
７
Perform the assembly following the procedures in reverse order.
[Cautions]
• When mounting the rear cover and the deflection base, be careful not to
pinch the lead wires and gasket.
• There are three (3) kinds of length of M2 screws. (M2x3, m2x5 and M2x8)
It may cause a failure if they are mistakenly mounted.
• Press the deflection base in the arrow direction. See the figure below on the right.
Nozzle setscrews
(M2
×
5)
Deflection electrode
setscrews (M2
×
3)
Charged electrode feed screw
(M2X3)
High voltage GND screw
(M2X5)
Deflection base setscrews (M2X14)
Deflection base
Deflection electrode
setscrews (M2
×
3)
Charged electrode feed screw
(M2X3)
high-voltage electrical power lines
setscrews (M2
×
3)
Nozzle1
Nozzle2