Mailbox Principles Of Operation; Mailbox Control - Xerox DocuPrint N24 Service Manual

8.2.6 Mailbox
Principles of Operation

8.2.6.1 Mailbox Control

The base engine Printer Engine Controller PWB provides the +5VDC and +24VDC that the Mailbox
requires for operation.
The printer AC power cord plugs into a grounded AC wall outlet. The cord transmits AC line voltage to
the Noise Filter PWB. The Noise Filter smooths the AC voltage and sends it to the Main Power Switch.
Switching on the Main Power Switch applies AC voltage to the Low Voltage Power Supply (LVPS) PWB.
The LVPS converts the 110VAC to regulated +5VDC and +24VDC voltages. The LVPS sends these
voltages to the Printer Engine Controller PWB. The MCU sends these two DC voltages to the Sorter
Control PWB. The Sorter Control PWB uses these voltages to run internal logic, sensors, solenoids, and
the motor within the Mailbox.
Mailbox Control is a broad term that is used to describe the printer resources that monitor and control the
actions and operations of the printer and the Mailbox; from bin output to error detection.
The center of Mailbox control is the Mailbox Control PWB. The Printer Engine Control PWB provides the
logic and information processing that is necessary for the printer to function, and the Mailbox Control
PWB provides the logic and information processing that is necessary for the Mailbox to function. Every
electrical component within the Mailbox is connected to the Mailbox Control PWB. Sensors in the
Mailbox send paper travel status information to the Mailbox Control PWB. The Mailbox Control PWB
processes that information and shares it with the Printer Engine Control PWB. Acting on the results of
the processing, the Mailbox Control PWB sends commands to the various Mailbox components;
switching on the motor or switching off a bin solenoid.
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