Chapter 3: Theory of Operation
1049766 Rev A
V60 Ventilator Service Manual
3-11
3.2.8
User Interface
•
Includes indicators and controls for setting and monitoring
parameters.
•
Includes LCD, backlight inverter PCBA, touch screen, power switch
overlay, rotary adjustment (nav-ring) assembly, UI PCBA, and switch
PCBA.
•
Audible alarms: Primary audio alarm includes two alarm speakers in
the base unit (adjustable from 60 to 95 dBA at 1 m), one connected
through the PM PCBA, and one connected through the MC PCBA.
Backup audio alarm (piezo alarm) mounted on the CPU PCBA.
3.2.9
LCD Assembly
•
12.1-in. diagonal flat panel, 768 x 1024 pixels with 6-bit color.
•
Connects to backlight inverter PCBA and CPU PCBA through the PM
PCBA.
•
Cold cathode fluorescent lamp (CCFL) backlight with 10,000-hour
minimum life (half initial brightness).
3.2.10 Backlight Inverter PCBA
•
Backlight inverter PCBA provides adjustable backlight drive voltage.
•
Backlight dimming capability using a 0 to 3.5-V control voltage from
the CPU PCBA through the PM PCBA
Backlight
inverter
PCBA
LCD assembly
User interface
Содержание Respironics V60
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