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Thread: Timeline 20x4 Backlit LCD

  1. #1
    Low Bitrate
    Join Date
    Apr 2000
    Location
    Houston, TX
    Posts
    57

    Angry Timeline 20x4 Backlit LCD

    I have the above lcd and have been using the schematic from http://www.jarcom.com/inmotion/ and haven't been able to get it to work. I got another one thinking I might have burt it out but that isn't the case. I checked the schematic and also the pinout and they are fine. I also don't have any shorts. Has anyone gotten this lcd to work?
    Rav4MP3
    BookPC - Celeron 500 - 128 MB - 10 GB - Pioneer Slot DVD
    IRMan: 1 Pioneer Remote; 2 Credit Card Remotes - USB Keypad - RF Keyboard
    5.8" LCD - 40 x 4 Backlit LCD Display
    Running: WinME - Winamp Album List 1.36 Plugin - PCRemoteControl - PowerDVD 3.0

  2. #2
    Low Bitrate
    Join Date
    Oct 1999
    Location
    N Ireland
    Posts
    108

    Post

    Make sure you have the contrast adjusted correctly.

  3. #3
    Low Bitrate
    Join Date
    Apr 2000
    Location
    Houston, TX
    Posts
    57

    Post

    I adjusted it both ways. And nothing.
    Rav4MP3
    BookPC - Celeron 500 - 128 MB - 10 GB - Pioneer Slot DVD
    IRMan: 1 Pioneer Remote; 2 Credit Card Remotes - USB Keypad - RF Keyboard
    5.8" LCD - 40 x 4 Backlit LCD Display
    Running: WinME - Winamp Album List 1.36 Plugin - PCRemoteControl - PowerDVD 3.0

  4. #4
    Low Bitrate
    Join Date
    Oct 1999
    Location
    N Ireland
    Posts
    108

    Post

    You should be able to adjust the contrast so that the whole displays blacks out. Maybe you have one of the displays that needs a negative voltage on the contrast adjustment.

  5. #5
    Low Bitrate
    Join Date
    Apr 2000
    Location
    Houston, TX
    Posts
    57

    Post

    Yes I do. It says that but I don't know how to hook it up properly. Can you edit the imotion schematic to properly show this negative voltage?
    Rav4MP3
    BookPC - Celeron 500 - 128 MB - 10 GB - Pioneer Slot DVD
    IRMan: 1 Pioneer Remote; 2 Credit Card Remotes - USB Keypad - RF Keyboard
    5.8" LCD - 40 x 4 Backlit LCD Display
    Running: WinME - Winamp Album List 1.36 Plugin - PCRemoteControl - PowerDVD 3.0

  6. #6
    Constant Bitrate
    Join Date
    Jun 2000
    Location
    landing, NJ, USA
    Posts
    134

    Post

    you try to connect the pin1 of the pot to -5v, pin2 (center tap) to your Vlc (Vee) and pin3 to ground
    20x4 is weird. i have it hook up and nothing work. now it work but only show me of 2 lines work out of 4 lines.

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