I got my lcd working. Since there has been others interested in using an lcd, here is what I did:
I am using a reprap smart controller found in numerous ebay auctions. It has a 4x24 lcd, rotary encoder, reset switch, speaker, and sd card slot. I have managed to get all but the speaker to work.
The first thing I learned is that board I purchased had the connectors backwards. In other words, pin 1 on the board is actually pin 10 on the cable for both exp1 and exp2 connectors. Since this is my only lcd, I don’t know if they are all like this. Check it closely is my advice.
The trickiest part for me was figuring out how to wire the cables. First of all, I know very little about either board and each uses different terminology to describe the pins. I could not find an 18 pin connector so I used a 20 pin to connect to the main board with two sockets just hanging in the air. Once I had my main board connector, I had to split up the other end to piece together 10 wires in the correct order for the smart controller.
Here is how you need to construct your cable:
k8200
(20 Pin connector used. If you can find an 18 pin connector delete the first two and move everything up)
Pin 1 Not Connected
Pin 2 Not Connected
Pin 3 MISO
Pin 4 RST
Pin 5 SCK
Pin 6 SS (Not Used)
Pin 7 PA3
Pin 8 MOSI
Pin 9 PA1
Pin 10 PC6
Pin 11 PA7
Pin 12 PC0
Pin 13 PA5
Pin 14 PC2
Pin 15 PH0
Pin 16 5v
Pin 17 PH1
Pin 18 12v (Not Used)
Pin 19 PC4
Pin 20 GND
Smart Controller Exp1
Pin 1 Not used (Speaker)
Pin 2 PA1
Pin 3 PA7
Pin 4 PA5
Pin 5 PC0
Pin 6 PC2
Pin 7 PC4
Pin 8 PC6
Pin 9 GND
Pin 10 5v
Smart Controller Exp2
Pin 1 MISO
Pin 2 SCK
Pin 3 PH1
Pin 4 PA3
Pin 5 PH0
Pin 6 MOSI
Pin 7 Not Used (SD Detect)
Pin 8 RST
Pin 9 Not Used
Pin 10 Not Used
Flash Marlin v2 and you are good to go.