7-52
7.6.2 Problems due to inappropriate ink stream position to gutter
>
If the ink stream does not enter the center of gutter, the following problems may
occur:
(1) The ink stream hits the inner wall of gutter inlet and “splash” occurs. This
will dirty the gutter, causing either Ink Drop Charge Too High or No Ink
Drop Charge.
(2) Ink accumulates on outer circumference of gutter. The ink stream collides
with this sediment, which will cause the lower dots of printing to be missing.
(See section 6.5.1 for details.)
(3) The ink drops charged for auto phase detection are deflected by the deflecting
field. Therefore, the ink stream position is deflected to the positive electrode
from the center of gutter: If A is larger than 2B as shown in figure below, the
ink drops may hit the end surface of gutter.
>
Check the ink stream position, and perform adjustment making sure that the ink
stream enters the center of gutter.
Good
Ink
stream
Negative
deflection
electrode
Gutter
Center
End
surface of
gutter
Center
Inner wall
of gutter
inlet
A>2xB
Summary of Contents for PXR
Page 1: ...Service Manual HITACHI Printer Model PXR Revision December 2008 Version C ...
Page 80: ...3 17 3 17 Circuit diagram of EZJ95 ...
Page 215: ...8 2 8 1 2 Circulation system diagram PXR P ...
Page 216: ...8 2 Air system diagram PXR P 8 3 ...
Page 217: ...8 4 8 3 Electrical Connection Diagram 8 3 1 Electrical Connection Diagram PXR D ...
Page 218: ...8 5 8 3 2 Electrical Connection Diagram PXR H ...
Page 219: ...8 3 3 Electrical connection diagram PXR P 8 6 ...