400W Series Installation Manual Page 5-11190-00356-02 Rev. G5.3.6 INSTRUMENT PANEL SELF-TEST PageSelect the INSTRUMENT PANEL SELF-TEST Page (seeFigure 5-8). This page allows verification that the 400WSeries unit is communicating properly with otherinstruments. Compare on-screen indications with theinformation depicted on connected instruments, such as theCDI, HSI, RMI and/or external annunciators. It alsodisplays fuel capacity, amount on-board, and flow.5.3.7 MAIN LIGHTING PageSelect the MAIN LIGHTING Page (see Figure 5-9). Thispage allows you to set display parameters that affect thedisplay backlight and key lighting brightness. TheDISPLAY and KEY lighting characteristics are adjustedseparately, each with the following fields:LIGHTINGShows the current level of display backlighting, based onthe lighting input source (lighting bus voltage, or the ambient light if the source is PHOTO) and thesettings on this configuration page. This field has a range of 0 (zero) to 9999.SOURCESelection DescriptionPHOTO Backlight level is determined by the ambient light level as measuredby the photocell on the 400W Series unit.14V DC Backlight level tracks a 14 volt DC aircraft lighting bus.28V DC Backlight level tracks a 28 volt DC aircraft lighting bus.5V DC Backlight level tracks a 5 volt DC aircraft lighting bus.5V AC Backlight level tracks a 5 volt AC aircraft lighting bus.RESP TIME - (Response Time)Sets the speed with which the brightness responds to the input level (bus voltage or ambient light)changes. The higher the number the slower the display responds. This field has a range of 3 to 7, and isset to 4 at the factory.MIN - (Minimum)Sets the minimum brightness of the display. The higher the number, the brighter the minimumbrightness. Display minimum brightness has a range of 35 to 999, and is set to 80 at the factory. Keyminimum brightness has a range of 20 to 99, and is set to 40 at the factory. It is prudent to verify thatdisplay and key lighting characteristics match those of other equipment in the panel under night lightingconditions.Figure 5-8. INSTRUMENT PANELSELF-TEST PageFigure 5-9. MAIN LIGHTING Page
