Liquid Crystal Display (Lcd); Keypad; Olp/Bridge Interface; Speaker (Audio Interface) - AGFA Avantra 36/44 Service Manual

Avantra 36/44 Service Manual
The OCP micro-controller reads the program directly from the FLASHROM via one
of its I/O ports. The display portion of the ROM can also be read by the micro-con-
troller and fed directly into the Liquid Crystal Display interface.

2.5.3 Liquid Crystal Display (LCD)

The display used on the Avantra is a 320 x 240 bit LCD. The display includes a
character generator for a 6 x 12 bit character as well as a graphical interface for the
icons stored in FLASHROM. The LCD connects to the OCP module via a 20-pin flex
cable.
The viewing angle of the LCD is user adjustable under software control. An 8-bit
word is written to a DAC which is proportional to the LCD's optimum viewing
angle.

2.5.4 Keypad

The keypad is set up in a 6 x 5 matrix of rows and columns. A key stroke is deter-
mined by clearing a column signal and reading the row to determine the active key
stroke

2.5.5 OLP/Bridge Interface

Refer to Section IV: On-line Processor .

2.5.6 Speaker (Audio Interface)

The OCP module includes a beeper/speaker. The beeper/speaker connects to a
port on the OCP micro-controller and can be activated under software control.
2.6

Carriage Sensor Driver Module (CSDM)

The CSDM is a PC Board that connects the carriage and all its associated electrical
devices to a common location on the moving carriage. The CSDM is located in the
interior part of the system and mounts on the moving carriage. The CSDM provides
an interface to the DEC through a Flex-Band Cable, connecting all the devices and
local drivers on the carriage directly to the DEC. The CSDM contains:
• Power lines back to the DEC board
• Carriage drive DC servo motor/encoder
• Spot changer/polarizer stepper motor
• Spinner motor DC servo motor/encoder
• Carriage digital motor/encoder
• Focus changer stepper motor
• Spot changer home sensor
• Polarizer home sensor
• Focus home sensor
2-10 Functional Analysis