AT3720A Service Guide
Page 7
...; T 3.5 mm Earphone jack for audio line input Video Functions T Support PAL/NTSC/SECAM video format (for AT3720A) T Support 480i/576i, 480p/576p, 1080i and 720p format T Build in Dynamic adaptive smoothing filter T Build in Dynamic temporal frame-filtering Noise Reduction T Build in mind. resolution: 1366x768 Display area: 37 inches diagonal Display color: 16.7 M colors (8 real bits per color) Life time: 60,000 hours Input Signal: 1-ch LVDS Contrast ratio: 1200:1 ( Typ...
...; T 3.5 mm Earphone jack for audio line input Video Functions T Support PAL/NTSC/SECAM video format (for AT3720A) T Support 480i/576i, 480p/576p, 1080i and 720p format T Build in Dynamic adaptive smoothing filter T Build in Dynamic temporal frame-filtering Noise Reduction T Build in mind. resolution: 1366x768 Display area: 37 inches diagonal Display color: 16.7 M colors (8 real bits per color) Life time: 60,000 hours Input Signal: 1-ch LVDS Contrast ratio: 1200:1 ( Typ...
AT3720A Service Guide
Page 15
... to set a time period after which the TV will switch itself to select correct input mode. Press to reture to turn your TV on input/source type). AT3720A Remote controller General Keys 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 No. 1 2 3 4 5 Item POWER DISPLAY MUTE Input buttons (TV/AV/ COMPONENT/PC) SLEEP 6 Number keys 7 RECALL Chapter 1 Description Press to the previous channel. 9 Press to select the TV channel.
... to set a time period after which the TV will switch itself to select correct input mode. Press to reture to turn your TV on input/source type). AT3720A Remote controller General Keys 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 No. 1 2 3 4 5 Item POWER DISPLAY MUTE Input buttons (TV/AV/ COMPONENT/PC) SLEEP 6 Number keys 7 RECALL Chapter 1 Description Press to the previous channel. 9 Press to select the TV channel.
AT3720A Service Guide
Page 17
... POWER DISPLAY MUTE Input buttons (TV/AV/ COMPONENT/PC) SLEEP 6 Number keys 7 RECALL Chapter 1 Description Press to display input/channel information (dependent on input/source type). Press to turn your TV on and off . Press to return to standby (15, 30, 45, 60, 90 or 120 minutes). Press to set a time period after which the TV will switch itself to the previous channel. 11 Press to select the...
... POWER DISPLAY MUTE Input buttons (TV/AV/ COMPONENT/PC) SLEEP 6 Number keys 7 RECALL Chapter 1 Description Press to display input/channel information (dependent on input/source type). Press to turn your TV on and off . Press to return to standby (15, 30, 45, 60, 90 or 120 minutes). Press to set a time period after which the TV will switch itself to the previous channel. 11 Press to select the...
AT3720A Service Guide
Page 18
... in POP mode: Switch POP mode from 1+5 to view subtitles on the teletext page. When in multi-page viewing mode. Press to 1+12. Press again to reveal hidden teletext information. 12 Chapter 1 Press to resume. Press to go to access the teletext's subpages directly. Press to the index page. 8 ENTER Press to confirm channel number selection. 9 MENU Press to open or close the Menu. 10...
... in POP mode: Switch POP mode from 1+5 to view subtitles on the teletext page. When in multi-page viewing mode. Press to 1+12. Press again to reveal hidden teletext information. 12 Chapter 1 Press to resume. Press to go to access the teletext's subpages directly. Press to the index page. 8 ENTER Press to confirm channel number selection. 9 MENU Press to open or close the Menu. 10...
AT3720A Service Guide
Page 19
... . Press to open or close the Menu. Press to select the TV channel. Press to confirm channel number selection. Press to return to the previous channel. Press to turn your TV on input/source type). Press to return to the previous channel. N/A Chapter 1 13 Press to set a time period after which the TV will switch itself to display input/channel information (dependent on /off . AT3720 Remote controller General Keys 1 2 3 4 5 6 7 8 9 10...
... . Press to open or close the Menu. Press to select the TV channel. Press to confirm channel number selection. Press to return to the previous channel. Press to turn your TV on input/source type). Press to return to the previous channel. N/A Chapter 1 13 Press to set a time period after which the TV will switch itself to display input/channel information (dependent on /off . AT3720 Remote controller General Keys 1 2 3 4 5 6 7 8 9 10...
AT3720A Service Guide
Page 24
Connecting external audio/video device Connecting a DVD, VCR, STB or audio/video equipment Connect your DVD player, VCR or audio/video equipment using the SCART port located at the rear of your LCD TV as shown below. For AT3720A: Source-IN Y Yellow R Red W White Blue Green S S-video NOTE: Acer recommends the following priority for connection types: HDMI -> DVI ->D-Sub ->COMPONENT > S-Video -> Composite. 18 ...
Connecting external audio/video device Connecting a DVD, VCR, STB or audio/video equipment Connect your DVD player, VCR or audio/video equipment using the SCART port located at the rear of your LCD TV as shown below. For AT3720A: Source-IN Y Yellow R Red W White Blue Green S S-video NOTE: Acer recommends the following priority for connection types: HDMI -> DVI ->D-Sub ->COMPONENT > S-Video -> Composite. 18 ...
AT3720A Service Guide
Page 26
For AT3720: Source-IN Y Yellow R Red W White Blue Green * Acer recommends the following priority for connection types: HDMI -> COMPONENT -> SCART -> Composite. TV-OUT *SCART-out only works with analog broadcasts. Connecting a camera, camcorder, video am or headphones Connect your camera or camcorder to the video/audio ports on the rear of the TV set as shown below. 20 Chapter 1
For AT3720: Source-IN Y Yellow R Red W White Blue Green * Acer recommends the following priority for connection types: HDMI -> COMPONENT -> SCART -> Composite. TV-OUT *SCART-out only works with analog broadcasts. Connecting a camera, camcorder, video am or headphones Connect your camera or camcorder to the video/audio ports on the rear of the TV set as shown below. 20 Chapter 1
AT3720A Service Guide
Page 27
For AT3720A: NOTE: For VGA and DVI input, Acer recommends setting your PC or notebook computer to 1360 x 768 pixel @ 60 Hz. Connecting a PC or notebook computer To display PC output on your TV, connect your PC's external monitor resolution to the TV as shown below. For AT3720B: Chapter 1 21
For AT3720A: NOTE: For VGA and DVI input, Acer recommends setting your PC or notebook computer to 1360 x 768 pixel @ 60 Hz. Connecting a PC or notebook computer To display PC output on your TV, connect your PC's external monitor resolution to the TV as shown below. For AT3720B: Chapter 1 21
AT3720A Service Guide
Page 30
... exit. The up and down directions will scroll through using the front panel controls. Chapter 1 Navigating the OSD with the remote control NOTE: You can also interact with the menu. No. Basic operations required to navigate these menus using the OSD (onscreen display) menus, as brightness, contrast, etc.) Press MENU to ineract with these menus (Picture, Audio, Channel management, Options, Settings and Empowering) are six...
... exit. The up and down directions will scroll through using the front panel controls. Chapter 1 Navigating the OSD with the remote control NOTE: You can also interact with the menu. No. Basic operations required to navigate these menus using the OSD (onscreen display) menus, as brightness, contrast, etc.) Press MENU to ineract with these menus (Picture, Audio, Channel management, Options, Settings and Empowering) are six...
AT3720A Service Guide
Page 31
... scale. Adjusting the OSD settings The OSD can be used to set the sleep timer and other important sound-related settings. You can use the OSD to open the OSD. Adjusting the audio settings 1 Press the MENU key to select the picture aspect-ratio mode, 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...
... scale. Adjusting the OSD settings The OSD can be used to set the sleep timer and other important sound-related settings. You can use the OSD to open the OSD. Adjusting the audio settings 1 Press the MENU key to select the picture aspect-ratio mode, 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...
AT3720A Service Guide
Page 33
... 2 seconds Default setting in different mode Set-up Empowering mode More than 2 seconds 2 TV mode Empowering Key settings menu Use the directional keys to navigate the menu and select the Empowering Technology icon. 3 Press MENU to open the menu. More than 2 seconds The Empowering Key opens up Empowering mode To change your chosen selection will be accessed. Now, when you press the Empowering Key, your Empowering Key's default setting: 1 Press...
... 2 seconds Default setting in different mode Set-up Empowering mode More than 2 seconds 2 TV mode Empowering Key settings menu Use the directional keys to navigate the menu and select the Empowering Technology icon. 3 Press MENU to open the menu. More than 2 seconds The Empowering Key opens up Empowering mode To change your chosen selection will be accessed. Now, when you press the Empowering Key, your Empowering Key's default setting: 1 Press...
AT3720A Service Guide
Page 34
... audio and video settings for color; Sports mode is achieved via adaptive brightness and contrast adjustments, and listen to clear-sounding audio. To set Favorite channel as the default, follow the steps on the remote control. Default setting in different Empowering mode Scenario mode in TV (default setting) Scenario mode has five preset viewing modes designed to give you to store five of your favorite TV channels and flick between them at home, Movie mode displays...
... audio and video settings for color; Sports mode is achieved via adaptive brightness and contrast adjustments, and listen to clear-sounding audio. To set Favorite channel as the default, follow the steps on the remote control. Default setting in different Empowering mode Scenario mode in TV (default setting) Scenario mode has five preset viewing modes designed to give you to store five of your favorite TV channels and flick between them at home, Movie mode displays...
AT3720A Service Guide
Page 35
... (on the control panel. 2. These are described in the example screenshot below. Use the directional pad to interact with Remote Control There are five main OSD menus. Basic operations required ot navigate these menus. 1. Navigating the OSD with the menu. Press the "Menu" button on the remote control or the "Menu" button on screen display) menus, as brightness, contrast, etc). The first time you access the OSD, you...
... (on the control panel. 2. These are described in the example screenshot below. Use the directional pad to interact with Remote Control There are five main OSD menus. Basic operations required ot navigate these menus. 1. Navigating the OSD with the menu. Press the "Menu" button on the remote control or the "Menu" button on screen display) menus, as brightness, contrast, etc). The first time you access the OSD, you...
AT3720A Service Guide
Page 41
... panel specification. acoustical noise (complete TV) Level: 500 mVrms Type: Stereo R/L Channels Impedance: More than 22 K ohm Interface: RCA Jack, R: Red color, L: White color Level: 500 mVrms Type: Stereo R/L Channels Impedance: More than 22 K ohm Interface: 3.5mm stereo jack Max. audio output (at 10% THD max.) at 500 Vrms / 1KHz input: 8W + 8W Sound Distortion at 250 mW / KHz: 1% THD max. Audio input 2. Volume: 500 uW Max. Stand-by consumption...
... panel specification. acoustical noise (complete TV) Level: 500 mVrms Type: Stereo R/L Channels Impedance: More than 22 K ohm Interface: RCA Jack, R: Red color, L: White color Level: 500 mVrms Type: Stereo R/L Channels Impedance: More than 22 K ohm Interface: 3.5mm stereo jack Max. audio output (at 10% THD max.) at 500 Vrms / 1KHz input: 8W + 8W Sound Distortion at 250 mW / KHz: 1% THD max. Audio input 2. Volume: 500 uW Max. Stand-by consumption...
AT3720A Service Guide
Page 42
Hard / Soft Performance 1. Languages supported Czech, Danish, Dutch, English, French, German, Italian, Polish, Portuguese, Russian, Spanish and Swedish 2. Starting time A correct picture (color, aspect ratio, stability) can be displayed
Hard / Soft Performance 1. Languages supported Czech, Danish, Dutch, English, French, German, Italian, Polish, Portuguese, Russian, Spanish and Swedish 2. Starting time A correct picture (color, aspect ratio, stability) can be displayed
AT3720A Service Guide
Page 44
... During a source / channel change, within 4 second to obtain a stable display • User adjustments: contrast, brightness, color, tint (NTSC), sharpness • Color temperature: cold, middle-cold, standard, middlewarm, warm • Aspect ratio available for all the video sources • 4/3, 16/9, panorama, letterbox1, letterbox2, letterbox3 NOTE: PC & DVI only support 4/3 & 16/9 Settings: Noise reduction: Standard, movie, sport, concert, game, user Off, Low, Middle, High User adjustment: Volume, Balance, Bass, Treble...
... During a source / channel change, within 4 second to obtain a stable display • User adjustments: contrast, brightness, color, tint (NTSC), sharpness • Color temperature: cold, middle-cold, standard, middlewarm, warm • Aspect ratio available for all the video sources • 4/3, 16/9, panorama, letterbox1, letterbox2, letterbox3 NOTE: PC & DVI only support 4/3 & 16/9 Settings: Noise reduction: Standard, movie, sport, concert, game, user Off, Low, Middle, High User adjustment: Volume, Balance, Bass, Treble...
AT3720A Service Guide
Page 51
.... Remove the three screws fastening the button board then disconnect the cable and remove the board. 18. Remove the four screws holding the main board-keypad-I R board cable and remove the cable. 20. Remove the four screws fastening the left speaker. 14. If you need to the front bezel. 21. Tear off the mylard cover the speaker cable and detach the speaker cable. 16. Remove the two screws holding the LCD...
.... Remove the three screws fastening the button board then disconnect the cable and remove the board. 18. Remove the four screws holding the main board-keypad-I R board cable and remove the cable. 20. Remove the four screws fastening the left speaker. 14. If you need to the front bezel. 21. Tear off the mylard cover the speaker cable and detach the speaker cable. 16. Remove the two screws holding the LCD...
AT3720A Service Guide
Page 56
AT3720A Troubleshooting Guideline 1. no LCD Panel no Replace Power board or Main board Or IO board or All cable / LED Bright Green color ? no Check Power code no can Display ? LED Bright? NG Replacement Remote control or IR board or Keypad board Check panel's no Check M/B all cable Replacement M/B Replacement Panel Replacement Cable Replacement M/B 50 Chapter 4 Can not power on A Power code Plug in? END Check Remote control OK and keypad ?
AT3720A Troubleshooting Guideline 1. no LCD Panel no Replace Power board or Main board Or IO board or All cable / LED Bright Green color ? no Check Power code no can Display ? LED Bright? NG Replacement Remote control or IR board or Keypad board Check panel's no Check M/B all cable Replacement M/B Replacement Panel Replacement Cable Replacement M/B 50 Chapter 4 Can not power on A Power code Plug in? END Check Remote control OK and keypad ?
AT3720A Service Guide
Page 63
Speaker does not have Sound Output ? no Check Video cable or Replacement Video Cable Mute turn off Volume set 50 Speaker R/L cable plug IN? no Replacement M/B Chapter 4 57 no Check Speaker cable or Replacement Speaker cable Speaker have Sound Output END no Check Audio R/L source cable Video can Display ? no Replacement IO/B or Speaker Speaker have sound H Audio R/L source had plug IN? 8.
Speaker does not have Sound Output ? no Check Video cable or Replacement Video Cable Mute turn off Volume set 50 Speaker R/L cable plug IN? no Replacement M/B Chapter 4 57 no Check Speaker cable or Replacement Speaker cable Speaker have Sound Output END no Check Audio R/L source cable Video can Display ? no Replacement IO/B or Speaker Speaker have sound H Audio R/L source had plug IN? 8.
AT3720A Service Guide
Page 68
VGA/DVI no Replacement Main/B END 62 Chapter 4 Sound Normal ? no Check Video cable or PC or Replacement VGA/DVI cable no Check Line in cable or Replacement Line in Cable Plug IN? 13. Turn off Mute function Volume set to 50 Audio Line in Cable no sound M PC/DVI can Display ?
VGA/DVI no Replacement Main/B END 62 Chapter 4 Sound Normal ? no Check Video cable or PC or Replacement VGA/DVI cable no Check Line in cable or Replacement Line in Cable Plug IN? 13. Turn off Mute function Volume set to 50 Audio Line in Cable no sound M PC/DVI can Display ?