S240320H/G (w/ Epson S1D13700 Controller)

Hi,

I'm new in this forum and I hope you can resolve my problem:
Sorry for my english...(I'm spanish)

Well, I have 240320G Display with Touch Screen and internal DC/DC converter..
The problem is...my glcd doesn't shows anything!!
I have proved many things:
My CCS program is in 8080 mode, so I have changed CNF4 to 0 (8080 mode)...nothing.
I have changed my S1D13700 driver a thousand times and nothing...
I have put a potentiometer (10 k) between Vo-Vee and nothing.
I have soldered the jumper that joins Vo-Vee...and nothing.

In other forums, people with other Displaytech GLCD (240320H) don't have problems with contrast...

Can you help me please?
The current for Vo-Vee in my lcd is 0,7 mA....it's ok? or it's very low??
If all is ok? Has anyone a driver library in c??
Thank you very much.... 
I'm desperate

Hi Modus83,

In order to assist please post your schematic and initialisation code.

Thanks,
Mike

Hi,

Thanks for your answer...

I have just uploaded my init code...
Main program is:

#include <18f2550.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP,NOMCLR
#use delay(clock=6000000)
#include "SED13700.c"
#include "graphics.c"

void main() {
   
   glcd_init(ON);
   
   output_high (PIN_C2);
  
   while (TRUE)
   {
   output_toggle (PIN_C2);
   glcd_fillscreen (ON);
   delay_ms (1000);
   output_toggle (PIN_C2);
   glcd_fillscreen (OFF);
   delay_ms (1000);
   
   }
}

The schematic is like the PDF data....
Data Port: Port B
A0 = A0
WR=A1
RD=A2
CS=A3
RST=C0
                                                                Vee
pin Vout gives 27,5 V                                   |
                                                                  |
Vee connection:               Vo----------------------10k-------------------VDD

The display desn´t shows anything.

VLED = 5V with resistor 15 ohms...great light....

CNF3 changed to 0 for 8080 mode....

Time ago, I soldered J3 Vout-Vee and nothing shows...

Thank you for helping me!

Attachment: SED13700.c (13.0KB)

The factory commented the contrast is controlled by hardware. Also, the corrections do not appear to be correct. Therefore, please reference the attached schematic and let us know if you have additional questions or concerns.

Attachment: 240320g & 240320h contrast control connection.pdf (6.0KB)