Acer AT4220A AT4220A Service Guide - Page 18

9 MENU Press to open or close the Menu. 10 TTX/MIX (TELETEXT/ Press to return to the previous channel. MIX) 11 Directional keys/OK N/A VOL (up/down) CH (up/down) 12 WIDE Press to toggle scaling mode between 4:3, 16:9, Panorama and Letterbox 1, 2, 3 modes. 13 MPX Press to select the sound input, displayed in the top right-hand corner (mono, stereo, bilingual). 14 e (Empowering Technology) Press to activate Acer Empowering Technology. 15 VOL (+/-) Press to increase or decrease the volume. 16 CH (up/down) Press to sequentially select the TV channel. 17 PIP/PBP/POP Switch between PIP/PBP/POP modes. 18 SWAP For PIP/PBP mode: Toggle between the primary and sub-screens. 18 ACTIVE Toggle between primary and sub-screens. 20 POSITION When in PIP mode: Change sub-screen position. 21 SIZE/MODE When in PIP mode: Change sub-screen size. When in POP mode: Switch POP mode from 1+5 to 1+12. Teletext 1 2 7    34 56 # Item 1 Color buttons (R/G/Y/B) 2 INDEX 3 SIZE 4 SUBTITLE 5 SUBPAGE 6 HOLD 7 REVEAL Description Operates corresponding button on the teletext page. Press to go to the index page. Press once to zoom teletext page to 2X. Press again to resume. Press to view subtitles on the screen. Press to access the teletext's sub-pages directly. Press to pause the current teletext page in multi-page viewing mode. Press to reveal hidden teletext information. 12 Chapter 1