Dead X-Board
Posted: Fri Mar 31, 2006 1:29 pm
Some time ago I purchased an Optrex DMC-20261NYJ-LY-BCE module from DigiKey. This is an extended operating temperature 2X20 LCD with a backlight.
Earlier this week I finally got the X-Board from HVW Technologies.
Last night I put the two together. When I applied 5VDC to the system, nothing happened. I managed to get the backlight to come on but no character display of any kind.
The two boards go together using the 2x8 header assembly, which had to be modified. Basically pins 1-14 bus to the display but 15 and 16 do not so I removed a pin from the interconnecting header and ran wires from the X-board to the A and K terminals on the backlight.
Any advice? I have no way of knowing if the X-board is toast or if the Optrex LCD module is defective. Both parts are new and have never been used. And as Murphy would have it, both are now soldered together. I did check for cold solder joints but everything looks good and rings out okay using the continuity check on my DVM.
Thanks in advance for your help.
Regards,
Gerry Shand
Earlier this week I finally got the X-Board from HVW Technologies.
Last night I put the two together. When I applied 5VDC to the system, nothing happened. I managed to get the backlight to come on but no character display of any kind.
The two boards go together using the 2x8 header assembly, which had to be modified. Basically pins 1-14 bus to the display but 15 and 16 do not so I removed a pin from the interconnecting header and ran wires from the X-board to the A and K terminals on the backlight.
Any advice? I have no way of knowing if the X-board is toast or if the Optrex LCD module is defective. Both parts are new and have never been used. And as Murphy would have it, both are now soldered together. I did check for cold solder joints but everything looks good and rings out okay using the continuity check on my DVM.
Thanks in advance for your help.
Regards,
Gerry Shand