Xerox DocuColor 12/DCCS50, Service Manual

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10-150 DocuColor 12/DCCS50
Mailbox/Sorter PWBAs, Print Transport through the
Reissue
Principles of Operation
Mailbox/Sorter PWBAs
The Mailbox/Sorter has two PWBAs:
•
The Mailbox/Sorter Control PWBA, shown in Figure 2 , monitors paper path sensors, inter-
lock switches, bin full switches, OCT full switch and OCT present and home position sta-
tus.
• The Decurler PWBA, shown in Figure 3 , monitors the paper path through the Decurler
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.
A self-test is performed on the Mailbox/Sorter Control PWBA during power on.
Print Transport through the Mailbox/Sorter
The Mailbox/Sorter contains three (3) motors. Table 1 shows the Mailbox/Sorter motor func-
tions.
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 for details of the components for this function.
Table 1 Mailbox/Sorter Control PWBA LEDs
LED Color Signal Comment
CR1 Vcc Lit indicates that digital logic power is avail-
able
CR2 RxD Flickering indicates command data being
received from IOT CPU PWBA
CR3 Reset Lit indicates that PWBA microcontroller is
being reset by IOT CPU PWBA
CR4 /Lock Lit indicates that Mailbox/Sorter Assembly
Motor is locked.
Table 1 Mailbox/Sorter Motors and Functions
Motors Drives: Transport Speed
Decurler Motor
(+24 VDC Stepper) Decurler In Roll 350, 220, 130, 60 mm/sec.
1st Decurler Roll
2nd Decurler Roll
Decurler Exit Roll
Sorter Motor
(+24 VDC Stepper) Sorter Entrance Roll
1-10 Vertical Bin Rolls
Sorter Exit Roll
OCT Motor
(+24 VDC Bi-directional)
(optional with printer) Offset Catch Tray
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