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LCD Not Working


New member
I bought the "CFAH1602B-TMC-JP" LCD the other day in blue - backlight and am connecting it to a parallel cable. I know parallel questions are not generally answered here but it's more to do with the LCD. I wired all 16 pins up correctly and can get the backlight to come on but that is it - I cannot get the 16 x 2 lights to work. I see on one side of the display that there is A and K, each having 2 pins - what are these for and should I connect another 4 wires to them? Really I need to know just how to get power to these lights.

Hope you can help.
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New member
I can get the backlight working by connecting 5V to Pin 15 and GND to Pin 16. However, I cannot get the 32 individual character displays to come on. Is there something I should be connecting to these?

CF Tech

> . . . connecting 5V to Pin 15 and GND to Pin 16 . . .

This will likely damage the backlight.

As far as connecting a CFAH* to a PC, about all we can offer is:

Check your wiring, again. :(

Good wiring guides for HD44780 compatible LCD's can be found:







You can also go to http://forums.bit-tech.net/showthread.php?threadid=5582 and search for "assuming alphanumeric" and you will find a short Q/A post on parallel displays.


New member
OK. Thanks for the links.

Just one last thing though... can you tell me what pins "A" and "K" are for?