Installing the LCD to your KM Device
Please read this all the way through before starting to install the KMX-LCD
Thank you

THIS IS THE TOP CONNECTOR FOR ALL KMs
DO NOT TRY TO ALIGN THE BOTTOM CONNECTOR PIN FOR PIN

This shows the pins at the TOP connector properly aligned and ready to push "home"


KMX-LCD pushed "home" onto the KM Device

THIS IS THE BOTTOM CONNECTOR FOR KM9 and KMX2-Pro Plus

THIS IS THE BOTTOM CONNECTOR FOR KM7, KM8, KM9a, KMX1 and KMX2
  
You can see the difference between the two KM Board Designs

         THIS IS THE SIDE CONNECTOR FOR KM9              THIS IS THE SIDE CONNECTOR FOR KM7, KM8, KM9a
   
You can see the difference between the two KM Board Designs

It is very easy to install your KMX-LCD to your KM series Password Device.

Looking at the TOP of the KM Device, mate the KMX-LCD so that the TOP pins match up with the sockets on the KM Device.

When these pins/sockets are aligned, the six-pin connectors in the middle of the board will also line up.

The pins for the BOTTOM row will match up (but not pin for pin) correctly with the sockets automatically.

After verifying that the TOP and middle pins are aligned with their sockets, gently push the two boards together.

There is a difference in the BOTTOM pin socket arrangement between the early and later version of the KM Device.

Please do not try to align the BOTTOM pins in a one-to-one fashion.

Just align the TOP pins and verify that the six pins in the middle also line up.

 

Once the boards are connected, you can install the normal cable for your connection probes.

 

At the bottom right, you can see the connector with FOUR (4) colored wires.

The pins are in the same order as your KM Device: From left to right,  VCC, GND, SCL, SDA, 3 and 2

The most common connections you will need are GND, SCL and SDA
as only the 93C46 requires using all SIX (6) connections
.

The colors identify the pins as follows:

Red = VCC or Power
Not needed except for the 93C46

Black = GND or Ground

 Yellow = SCL or Clock

White or Green= SDA or Data

The last wire color depends on which cable is supplied

If you have been using your KM Device already, you know that you are using the connections for GND, SCL and SDA.

Finding a suitable location for GND  has been a bit of a problem for some, so here's a tip:

If you are connecting your KM Device to the USB connection of the laptop with the password,
you don't need to connect the extra GND Connector.

You just need to connect the SCL and SDA to effect the repair.

If you don't use the VCC or GND connections,
PLEASE make sure the ends are insulated and can NOT ground out or short out.

Wrap them SEPARATELY with a piece of electrical tape or the equivalent.

There are TWO (2) ways to adjust the contrast on the KMX-LCD:

If you have a KM7, KM8, KM9 or KM9a, you use the trim pot on the top right corner:

Original Board looks like this:

Newer Board looks like this:

Turn the pot with a small screwdriver in small increments to make the display as readable as possible.
Try small turns in both directions as everyone will have their own likes and dislikes.

If you have the new LMX-1 reader, you might want to use 
the digital contrast control that is now available:

On EARLY versions of the KMX-LCD you will need to remove the jumper cap that is in the center of the board, under the LCD.


This is how the board arrives  

  
This is with the jumper removed

On the NEWER Board, there is no jumper, you just turn the Pot all the way clockwise and the digital control will work.

Follow the directions for setting the contrast on Joe's website.

That section is coming. Right now, you can use the KMX-LCD with the contrast set by the pot as above.