Ricoh Gestetner 5428C, Service Manual

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31 October 2001 MECHANISM OVERVIEW
6-3
Detailed
Descriptions
Boards
No. Component Function
51
Main Processing Unit (MPU) Controls all machine functions, both directly and
through other boards.
4 Lamp Stabilizer This supplies power to the exposure lamp.
29 Power Supply Unit (PSU) Provides dc power to the machine.
28 Operation Panel Boards These boards control the operation panel.
5 CCD and SBU Outputs a video signal to the MPU.
43 Main Motor Board Controls the main motor speed.
22 Ink Detection Board Checks if there is ink in the drum.
15
Paper Width Detection Board Sends data about the paper width on the paper
table to the MPU.
Motors
No. Component Function
12 Master Feed Motor Feeds the master to the drum.
7 Cutter Motor Cuts the master.
48
Registration Motor Feeds the paper to align it with the master on the
drum.
50 Paper Feed Motor Feeds the paper from the paper table.
8 Scanner Motor Drives the scanner.
33 Master Eject Motor Sends used masters into the master eject box.
35
Air Knife Fan Motor 1 Rotates the fan to provide air to separate the
leading edge of the paper from the drum.
36 Air Knife Fan Motor 2
41 Pressure Plate Motor Raises and lowers the pressure plate.
39
Vacuum Fan Motor Provides suction so that paper is held firmly on the
transport belt.
40 Paper Delivery Motor Feeds out the printed paper.
42 Clamper Motor Opens or closes the master clamper on the drum.
47 Main Motor Rotates the drum.
20 Table Motor Raises and lowers the paper table.
23 Ink Pump Motor Drives the ink pump.