Discussion in "General help Guidance and Discussion" started by    madhu_b63    Sep 29, 2007.
Sat Sep 29 2007, 09:05 pm
#1
Hello ajay,
I am using the generic 2x16 lcd module.How i can check whether the lcd module is working or not.
Sat Sep 29 2007, 10:15 pm
#2
I still do not get what you asking actually so i have posted some question that might help me to know more regarding your LCD problem...
Do you just want to check whether your LCD is working or not?
what happened to LCD?
what are you getting on display?
did you make wrong connections to LCD?
 madhu_b63 like this.
Sat Sep 29 2007, 10:37 pm
#3
also before getting much worried about s/w h/w .... which i believe u must have got right.... try varying the pot(var. register used to control contrast)... :-)
 madhu_b63 like this.
Wed Oct 03 2007, 05:27 am
#4
Thank u for ur replays i solved the problem
Thu Oct 04 2007, 03:30 pm
#5
hey wait what was the problem?????
wudnt u share it with us???
Fri Oct 05 2007, 05:39 am
#6
Hello shyam,
A thin layer of solder was shorting between the pin 3 and pin2 of the lcd module.

Fri Oct 05 2007, 11:53 am
#7
usually its always a hardware problem
Sat Oct 06 2007, 12:25 am
#8
so the problem is solved.........
gud luck for ur project.........
Thu Oct 11 2007, 09:49 am
#9
Hi everyone,
I try to connect a LCD module to a pic microcontroller , but I am having problem with it. I use a Wintek LCD module wich has integrated an ST7066U LCD controller. When I connect it, the voltage regulator starts to overheat , so I guess there is a shortcircuit somewhere. Even if I supply only the LCM the 5V appears on the LED+(Pin 15)and the 0V at the LEd-(Pin16). Due to the BLock Diagramm they should be seprated, the first pins should go the the LCM, and the last ones to the Backlighting. My question is can I do something to work it out? The fault is mine or it is something wrong with the Lcd module?
My connection is:
Pin1: Gnd -> 0V
Pin2: Power supply for the LCM-> 5V
Pin3: Vo - I connect this to a 10kPot.
Pin4: RS - PortC4
Pin5 : R/W -> 0V
Pin6 : E -> PortC5
Pin6-Pin14: D0-D7 ->PortB0-7
Pin15: Led+ ->5V
Pin16: Led- -> 0V
Thu Oct 11 2007, 10:37 am
#10
the problem could be high current consumption... usually its the backlight LED. Try to remove the connections of pin 15 and 16.. and see if you get the same problem..
also.. is your LCD working properly?

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