How the Unit Works
© Diebold Election Systems, Inc. 2002 AccuVote-OS Hardware Guide
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2.
How the Unit Works
This section provides a detailed look at the AccuVote-OS and its components.
2.1. Inside the AccuVote-OS
Figure 2-1: The AccuVote-OS
The AccuVote-OS ballot processing unit consists of the following components, as illustrated in
Figure
2-1:
•
ballot reader
•
CPU board
•
Read Only Memory (ROM)
•
Random Access Memory (RAM)
•
memory card interface
•
Liquid Crystal Display (LCD)
•
printer
•
power supply
•
optional modem
2.1.1. Ballot reader electronics
The ballot reader processes ballots 8½” wide and either 11”, 14” or 18” in length. Both ballot
sides are read simultaneously by visible light sensors, in either one of two orientations. The
electronic circuitry of the ballot reader comprises two sets of printed circuit boards, one set above
the moving ballot and the other set below. The two sets of circuit board are identical except for
connectors and motor drive circuitry on the lower circuit board.