5. PROCESS AND TONER DENSITY CONTROL SETTINGS
5.1 Service Tools Display
5.1.1 Process control ON screen [4-01]
5.1.2 Process control OFF screen
"6" is automatically set. (This exposes the
black-and-white pattern on the OPC at 6th level of
the image density.)
By pressing this key, the process
control is disabled. All the shift
steps are cleared if it is turned
ON again.
Shows the actual values of the
OPC potential for each item. (VD
is measured by the A sensor, and
the other items are measured by
the B sensor.) All target and actual
voltages are negative except for
VPCC which is positive.
NOTE:
VD, VL, and VPCC are controlled
to meet their target values. When
there is some residual potential on
the OPC (VR) and there is some
bias compensation (Bias shift), the
value added to VR’s actual value
on VD or VL target value, is
indicated as VD or VL actual value.
Shows the target values
for VD,VL, and VPCC.
They can be changed
by the value change
keys (▲▼). All target
and actual voltages are
negative except for
VPCC which is positive.
NOTE:
VPCC target value
should always be set at
130 volts. VD and VL
target values are
different from one
machine to another.
Shows the number of steps
shifted to have VD, VL, and
VPCC reach their target
values, and to compensate for
VR. When a shift step is
negative, the window turns red.
NOTE:
The maximum shift steps for
one time compensation are 1
for PCC and 3 for the other
items.
Shows the output
levels for each item.
They can be changed
on the process
control OFF screen.
NOTE:
They are adjusted at
[20] [9] [0] [2] at the
production line. The
grid output (--650
volts) is adjusted by
the volume of the
power pack. The
flash output is
adjusted on this
screen. (Therefore,
the flash setting is not
always "9".)
On this screen, the process control is disabled.
The output levels for each item can be changed by
the value change keys ( ▲▼).
NOTE:
When this screen is selected, the AID key
disappears from the operation display. This is
because AID mode needs the potential sensor, to
be operative.
1 July 1994 Service Tools Display
5-1
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