Mailbox/Sorter Pwbas; Print Transport Through The Mailbox/Sorter; Decurler Control - Xerox DocuColor 12/DCCS50 Service Manual

Mailbox/Sorter PWBAs

The Mailbox/Sorter has two PWBAs:
• The Mailbox/Sorter Control PWBA, shown in
lock switches, bin full switches, OCT full switch and OCT present and home position sta-
tus.
• The Decurler PWBA, shown in Figure
and controls the decurling function and communicates with the Mailbox/Sorter Control
PWBA.
The Mailbox/Sorter Control PWBA includes four (4) LEDs. The IOT CPU PWBA has LEDs that
light to indicate active communication between the two PWBAs.
Table 1 Mailbox/Sorter Control PWBA LEDs
LED Color Signal
CR1 Vcc
CR2 RxD
CR3 Reset
CR4 /Lock
A self-test is performed on the Mailbox/Sorter Control PWBA during power on.
Principles of Operation
Mailbox/Sorter PWBAs, Print Transport through the
Figure 2, monitors paper path sensors, inter-
3, monitors the paper path through the Decurler
Comment
Lit indicates that digital logic power is avail-
able
Flickering indicates command data being
received from IOT CPU PWBA
Lit indicates that PWBA microcontroller is
being reset by IOT CPU PWBA
Lit indicates that Mailbox/Sorter Assembly
Motor is locked.

Print Transport through the Mailbox/Sorter

The Mailbox/Sorter contains three (3) motors.
tions.
Table 1 Mailbox/Sorter Motors and Functions
Motors Drives:
Decurler Motor Decurler In Roll
(+24 VDC Stepper)
1st Decurler Roll
2nd Decurler Roll
Decurler Exit Roll
Sorter Motor Sorter Entrance Roll
(+24 VDC Stepper)
1-10 Vertical Bin Rolls
Sorter Exit Roll
OCT Motor Offset Catch Tray
(+24 VDC Bi-directional)
(optional with printer)

Decurler control

The Decurler neurtralizes paper curl that results from the Xerographic process. The basic con-
cept of decurling is to force a smaller diameter metal roll with a hard surface into the much
softer foam surface of a larger diameter roll. This creates a valley in the larger roll, and the print
is forced into this valley in the opposite direction of its natural curl. Prints curl toward the side
having fused toner.
Paper curl and the decurling process is dependent upon these variables:
• Paper weight and type
• Single or two sided copies
• Black-and-white or Color copies
• Pixel density
• Humidity
To address the different amount and directions of paper curl, the Decurler Motor operates at
different speeds and one of the two Decurling Rollers cam up or down by different distances to
decurl the paper.
The Decurler Motor has the following adjustable parameters:
• The distance by which the harder roll is forced into the surface of the softer roll, called the
Nip Shift
• The speed at which the paper travels through the decurler
• Which decurler (upper or lower) is active
Refer to Figure 1 and Table 2
1/05
10-150
manuals4you.com manuals4you.com
Table 1 shows the Mailbox/Sorter motor func-
Transport Speed
350, 220, 130, 60 mm/sec.
for details of the components for this function.
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