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Thread: sharp LQ141X1LH23 pin out

  1. #11
    Variable Bitrate
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    Power wires of the lcd (13,14?) to Pin7 (Vcc3/Vcc5 after setting the jumper to the 3.3V position!) of the motherboard lvds connector.

    But contrary to my former post, the GNDs on the LCD must be connected to the Vdd_LCD on the motherboard lvds connector. I think it does not have significance, but it is more correct than chassis ground.

    In other words, LCD has a standard connector.
    Check it twice, before connecting! Especially power and GND.
    Alopecia perniciosa

  2. #12
    Constant Bitrate
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    I can't even explain how thank full I am for this help. now do you know anything about backlight inverters. As I have the one that came with the lcd.
    the backlight inverter harness is also pinned with the lvds cable from the laptop. there is a total of 7 wires. i know wire colors do no matter but this is what i have. Pin 1 is brown, 2 red, 3 orange, 4 blue, 5 purple, 6 yellow, 7 white.
    Written on the inverter pcb is TAMURA YKCN86V-0 HBL-0207 E-P1-70860

    looking at the connector and the pcb. the first 2 pins 1 and 2 are connected to the same trace on the circuit board. they also go to the F1 2A fuse. leads me to believe that these first 2 pins (1 brn, 2 red) are power. Are these 12V? next 2 pins (3 orn, 4 blu) are also connected together through a trace on the pcb.
    I will need help identifying these wires and also help on where to connect them to the lvds connector on the motherboard.

    eventually i will be trying to make a led backlight replacing the ccfl with tiny surface mount led's. but until then id like to get my screen lit and useable.

  3. #13
    Variable Bitrate
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    You are right, those wires that are protected by a fuse are +. Very likely there is 12V power (connect to 1,2 on motherboard lvds conn). You can measure the GNDs also.
    Other control cables are:

    enable (usually goes to a base of an smd transistor or directly into an IC)

    brightness (usually goes to a resistor and a capacitor to the ground and then into the IC)

    Enable can be connected to l_bklten, brightness is to l_bkltctl.
    I am unable to imagine what the seventh wire could be...is it connected to anything?
    Alopecia perniciosa

  4. #14
    Raw Wave Rob Withey's Avatar
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    Quote Originally Posted by bbalazs View Post
    I am unable to imagine what the seventh wire could be...is it connected to anything?
    Sometimes backlight inverters have an output to indicate a fault condition. Perhaps it is this?
    Old Systems retired due to new car
    New system at design/prototype stage on BeagleBoard.

  5. #15
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    might have a slight problem, need some clarification. Found out the msi gm965 lvds interface is 24 bit dual channel, wil i have a problem running the lcd mentioned above. And how do i determine how many bits the lcd is? the lcd had 14 pins which have been figured out above.
    thanks

  6. #16
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    If the motherboard is unable to work in single channel mode, the connection is impossible. 24bits means 8-8-8 bits red,green, blue.
    Alopecia perniciosa

  7. #17
    Constant Bitrate
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    i bought the motherboard today. still waiting on my connector from digi key which is on back order till nov 1st. if i am unable to get the motherboard to work in single channel ill be getting a new lcd. know anything about the led backlight lcd from the apple g4 i book laptop. the 12.1" version? I know its lvds.

  8. #18
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    17 LCD monitors and above are double-channel LVDS...
    Alopecia perniciosa

  9. #19
    Newbie jorbedo's Avatar
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    LVDS pinout guide, WOW!!

    At least, critical info for my project.

    I had been searching for this info for the last 2 months.

    Thanks Rob, Giuliano and Motorcity for your Help (The LVDS gurus).

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