1 - 7
Theory of Operation
Hardware Structure
1.4.3
Key and Displays Board
The key and displays board, shown in FIGURE 1-6, provides the user interface. The board
contains the LCD module, 7-segment digital display, LED indication lamp, and keys.
FIGURE 1-6
Key and displays Board Principle Diagram
The LCD module adjusts brightness and contrast (only for black-and-white LCD display).
NOTE:
The monitor with color LCD does not have “Contrast ”
setting item in the common setup menu.
The 7-segment digit units display parameter data.
The AC indicator is driven by the ADV output from the power board, and the working status
indicator (built in the Power On/Off key) is driven by 3.3V voltage. The battery indicator is
jointly controlled by the flash control signal, ADV signal, and VBC signal.
The keypad contains the power ON/OFF key and the other 13 function keys.
3.3V
DISABLE
LED
FSTN LCD
MODULE
LCD
SIGNAL
ADV
3.3V
VSB
KEY MATRIX
CPLD
START-UP
CIRCUIT
Switch
DETECTION
LED&KEY
Summary of Contents for Rosebud Accutorr V
Page 1: ...USER MANUAL Vital Signs Monitor...
Page 125: ...0070 00 0702 Rev 7 0 October 2015...
