Xerox ColorQube 9303 Series, Service Manual

Page: 1751 / 1812

February 2013
8-57 ColorQube® 9303 Family
Principles of Operation
Nip E and the confirm sensor - This nip accepts sheet from nip H and it also accepts sheets
from the bypass tray. When a sheet arrives from the bypass tray, the leading edge passes
through nip E. Once its presence is confirmed by the confirm sensor (#16), the sheet is pulled
from the bypass tray by nip E. Refer to
Figure 2 .
NOTE: after the sheet has left the bypass tray feed sensor, and before it enters nip E, there is
a short wait period. This is to synchronize the leading edge of the sheet with the marking oper-
ation
Nip D - This is the last set of rolls to be driven by the vertical transport motor. This nip can be
opened or closed by the action of the nip D solenoid. It is necessary to open the nip to accom-
modate duplex sheet feeding. Refer to
Figure 2 .
Figure 2 Vertical transport components
Horizontal Transport
The horizontal transport handles sheets being fed to the marking process. Simplex sheets or
duplex sheets for first-side marking are fed from the vertical transport. Duplex sheets for sec-
ond-side marking are fed back into the horizontal transport from the duplex transport. The hor-
izontal transport is also used when performing the final inversion on single-side printed tabs
and duplex pre-drilled or pre-printed stock. The components associated with the horizontal
transport are:
Horizontal transport motor, M6 - This is a servo motor, located at the rear of the transport. This
motor drives nips C, R and Q via a 90-tooth gear and two, 108-tooth drive belts. Refer to
Figure
3 .
Duplex sensor (#14) - A reflective sensor, located on the top of the horizontal transport. When
the sheet is fed from the vertical transport, this sensor detects the leading edge. Nip C rotates
in the forward direction to transport the sheet for first-side marking. When the sheet returns via
nip C for second-side marking, the duplex sensor detects the sheet leading edge. Nip C rotates
in the reverse direction and continues to do so until the sensor detects the sheet trailing edge.
Nip C then changes to rotates in the forward direction to feed the second side of the sheet for
marking. Refer to
Figure 4 .
Nip C - Driven by motor M6 and can opened when necessary, by the nip C solenoid.
Nip C solenoid - A 48V solenoid located on top of the horizontal transport. The nip C solenoid
actuates to open nip C. Nip C opens to allow nip A in the registration / preheat assembly mod-
ule to control the speed and skew of the sheet. Refer to
Figure 4 .
Diverter solenoid - A 48V solenoid, located on top of the horizontal transport. The diverter sole-
noid actuates to allow sheets to return from the duplex transport to nip C, rotating in reverse,
for second-side marking. It de-actuates to feed sheets to the drum, with nip C rotating for-
wards. Refer to
Figure 4 and Figure 5 .
Duplex sensor (#17) - A reflective sensor, located on the top of the horizontal transport. Duplex
sensor 17 detects the leading and trailing edges of sheets returning along the horizontal trans-
port for second-side marking. Refer to
Figure 4 .
Nip roll R and nip roll Q - Fixed nips driven by motor M6. Nips R and Q transport the sheets
returning along the horizontal transport, for second-side marking. Refer to
Figure 4 .
Nip roll D
Vertical
transport
motor
Confirm
sensor
Nip E
Nip F
Vertical jam
sensor
Nip H
Gear
train
Toothed
belt