Chapter 4: 13
Chapter 4: Circuit Description
4.1 General Description
4.1.1 The following boards are used in the 8000 Main Module:
a. Single Board Computer
b. Daughter Board
c. Connector Board
d. Parallel Interface
e. Printer Interface
f. Offline Power Supply
g. Front Panel Keyboard
4.1.2 The following boards are used in the 8050 and 8120 Sound Chambers:
a. Chamber Board (both)
b. Breakout Board (both)
c. Turntable (8120 only)
4.1.3 The Probe Remote Module has:
The Probe Board.
4.1.4 The Single Board Computer(SBC) has:
The X86 microprocessor, BIOS, DRAM, Compact Flash, Display controller with
VGA Interface, Audio Codec, RS232 interface, Parallel Port, PC104 Buss, and the
Time-of-day clock.
4.1.5 The Parallel Interface Board has:
The 2x13 connector going to the SBC through a cable.
The 2x15 connector that plugs directly into (CN1) Printer Interface Board.
4.1.6 The Printer Interface Board has:
The Parallel Interface (CN1) connector.
The Power connector from the offline power supply .
The Thermal Printer Head, Stepper motor, Paper up, and Head Switch connectors.
A microcontroller and all circuits needed to drive the internal Thermal printer.
Note: A 640 x 416 dot screen image is mapped to the internal printer. Each dot is
replaced with a matrix of 2x2 pixels. The printed image is one set of 2 x 416 dots
per line, for 832 dots per line. Each line is printed twice to obtain the 2 x 2 matrix
for each dot.
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