Figure 5-8. Instrument Panel Self-Test Page; Figure 5-9. Main Lighting Page - Garmin GPS 400W Installation Manual

5.3.6 I NSTRUMENT PANEL SELF-TEST Page
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Select the INSTRUMENT PANEL SELF-TEST Page (see
F igure 5-8). This page allows verification that the 400W
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Series unit is communicating properly with other
instruments. Compare on-screen indications with the
information depicted on connected instruments, such as the
CDI, HSI, RMI and/or external annunciators. It also
displays fuel capacity, amount on-board, and flow.
5.3.7 M AIN LIGHTING Page
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Select the MAIN LIGHTING Page (see
page allows you to set display parameters that affect the
display backlight and key lighting brightness. The
DISPLAY and KEY lighting characteristics are adjusted
separately, each with the following fields:
LIGHTING
Shows the current level of display backlighting, based on
the lighting input source (lighting bus voltage, or the ambient light if the source is PHOTO) and the
settings on this configuration page. This field has a range of 0 (zero) to 9999.
SOURCE
Selection
PHOTO
14V DC
28V DC
5V DC
5V AC
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 is
set to 4 at the factory.
MIN - (Minimum)
Sets the minimum brightness of the display. The higher the number, the brighter the minimum
brightness. Display minimum brightness has a range of 35 to 999, and is set to 80 at the factory. Key
minimum brightness has a range of 20 to 99, and is set to 40 at the factory. It is prudent to verify that
display and key lighting characteristics match those of other equipment in the panel under night lighting
conditions.
400W Series Installation Manual
190-00356-02
F igure 5-9). This
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Description
Backlight level is determined by the ambient light level as measured
by the photocell on the 400W Series unit.
Backlight level tracks a 14 volt DC aircraft lighting bus.
Backlight level tracks a 28 volt DC aircraft lighting bus.
Backlight level tracks a 5 volt DC aircraft lighting bus.
Backlight level tracks a 5 volt AC aircraft lighting bus.
Figure 5-8. INSTRUMENT PANEL
SELF-TEST Page

Figure 5-9. MAIN LIGHTING Page

Page 5-11
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