Acer AT4220A, Service Manual, Page: 31 / 78

Chapter 1 25
general settings, and Empowering Technology. For advanced settings, please refer to following
page.
Adjusting the Picture Quality
1. Press the MENU key to bring up the OSD.
2. Using the directional keys, select Picture from the OSD.
Then navigate to the picture element you wish to
adjust.
3. Use the left or right keys to adjust the sliding scales.
4. The
Picture menu can be used to adjust the current
Scenario mode, brightness, contrast, color, sharpness
and other image-related qualities.
Adjusting the Audio Settings
1. Press the MENU key to bring up the OSD.
2. Using the directional keys, select Audio from the
onscreen display. Then navigate to the feature you wish
to adjust.
3. Use the left or right keys to adjust the sliding scale. Press
OK to save.
4. The Audio menu can also be used to adjust the treble,
balance, sound effects and other important sound-
related settings.
Adjust the Channel Management
1. Press the MENU key to bring up the OSD.
2. Using the directional keys, select Channel
management from the OSD.
3. Use the directional keys to navigate the menus.
4. The
Channel management menu can be used to set
channel skipped, select TV system and scan channels
automatically.
Adjusting other Options
1. Press the MENU key to bring up the OSD.
2. Using the directional keys, select Options from the
OSD.
3. Use the directional keys to navigate the menus.
4. The
Options menu can be used to select the picture
aspect-ratio mode, set the sleep timer and other
important options.