Garmin 225B, 225A manual Display Brightness, Select the Offset Value

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3.4.2Display Brightness

As it arrives from the factory, the GTR 225 automatically adjusts its display brightness for the current lighting conditions. A small sensor on the display is used for this function. A manual adjustment is available for controlling the brightness level of the display as an offset from the “normal” or zero position.

The limits of the adjustment range are: -10 (Low Display Intensity) and 100 (High Display Intensity). A value above zero means brighter than normal and a value below zero means darker than normal. The range can be adjusted by using the SMALL knob to adjust the value.

The GTR 225 will either control dimming based on the photocell or the lighting bus. This is set in configuration mode during installation and is not selectable by the pilot.

1. Press FUNC to access the Functions. Turn the LARGE knob to select the SYS Function. Turn the SMALL knob to view the Display Brightness function. Then, press the ENT key.

							Current Display
							Brightness


Press ENT to	Accept	Press CLR to Return		Turn the SMALL Knob to
the Selected Value		to the Previous Value		Select the Offset Value

Figure 3-22 Set Display Brightness

2.Turn the SMALL knob to set the value. Then, press the ENT key.

190-01182-00 Rev. A

Garmin GTR 225/225A/225B Pilot’s Guide

3-13

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Contents GTR 225/225A/225B November Limited Warranty Garmin GTR 225/225A/225B Pilot’s Guide Operation US Toll Free Canada Toll Free Product Registration and SupportContents Index Index-1 Photo Sensor Product DescriptionPilot Controls Power/Com Volume/Squelch KnobMEM Key Tuning LARGE/SMALL Concentric Cursor KnobsFLIP/FLOP Key Com KeyFunc Function Key USB PortMON Monitor Key Selected Frequency Power OnCom Radio Selecting a Com FrequencyMonitor Annunciation Standby Frequency Being Monitored Monitoring the Standby Com ChannelSaving a Com Channel After selecting the desired characters, press ENTSelected Wpt Type After making a selection, press ENTEmergency Channel Com Database Look-UpActive and Standby frequencies Airport Identifier Shown For Freqs In Database Stuck MicFrequency Database Reverse Look-Up Remote Frequency Selection ControlThis page intentionally left blank Functions Description SYS Config Com SpacingCom Frequencies Press the Func key to access the FunctionsRecent Com Frequencies Press ENT Key To Delete Selected Freq Com User FrequenciesPress the CLR key to delete this User frequency Selected Frequency Select Wpt Name Select Wpt TypeSelect User Wpt Name Frequencies. Press ENTSelect User Freqs Select User Freq ValueSelected Freq As Active Com Database FrequenciesPress ENT Key To Set Selected Freq As Standby IdentifierTurn Small Knob To Scroll Through Available Airports Com Nearest Airports APTCom Nearest Area Control Center ACC Frequencies Turn the Small knob to display the available ACCs13 Com Nearest FSS Frequencies Com Nearest Flight Service Station FSS Frequencies14 Com Nearest Weather Frequencies Com Nearest Weather WX FrequenciesAdjust Intercom ICS ConfigurationTurn the Small knob to turn the Aux Audio On or Off Aux AudioSpeaker On/Off function. Then, press ENT Intercom On/OffSpeaker On/Off Intercom On/Off function. Then, press the ENT keyCom Spacing System ConfigurationTurn the Small Knob to Select the Channel Spacing Brightness Display BrightnessSelect the Offset Value Database Version function. Then, press the ENT key Display ContrastDatabase Info Display Contrast function. Then, press the ENT keyLoad Database function. Then, press the ENT key Load DatabaseUSB Port USB Cable USB Memory Device Serial Number function. Then, press ENT Software VersionSerial Number Press the Func key to return to the main menuSetting Up the Count Down Timer TimersPressing ENT twice will stop the displayed Timer Setting Up the Count Up TimerViewing Timers in the Com Display Pressing CLR and then ENT will reset the displayed Timer36 Count Down Timer Value Now Counting Up Count Down Timer Value Highlighted When Counting UpThis page intentionally left blank Appendix TroubleshootingCheck Mic key input It can be enabledOr disabled via a Remote mounted If in Lock Out modeUpdating the Frequency Database Messages Radio will no longer Transmit Power has been Re-apply power to the unitSwitch has been All installationsThis input will now InstallationsIndex Stuck mic 2-5 Support