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BITX ver 5 Display Problem

Dennis Heikura
 

I recently finished up my version 5 and lo and behold to my surprise, I have no display. I have?
checked all the wiring over twice and cannot find any errors. Has anyone run into this problem.
All other functions appear to work but really cannot tell what's going on without the display.
Any advice would be appreciated. Thanks
73
Dennis Heikura, wb7egg@...
 

Assuming that is the 2-line LCD, have you tried adjusting the blue contrast pot on the back of the Raduino?

=Vic=
Dennis Heikura
 

No I haven't but will straight away. Thank You


On Sun, May 15, 2022 at 3:21 AM Vic WA4THR via <vhklein=[email protected]> wrote:
Assuming that is the 2-line LCD, have you tried adjusting the blue contrast pot on the back of the Raduino?

=Vic=

 

Dennis,

If the contrast adjustment does not work, I would suggest you verify the 5volts to the display on pins 2 and 15.? Here is the schematic for the v5 Raduino.

The schematics for the v5 are available on the HFSignals web pages here:



73
Evan
AC9TU

Dennis Heikura
 

Thank You


On Mon, May 16, 2022 at 6:24 AM Evan Hand <elhandjr@...> wrote:
Dennis,

If the contrast adjustment does not work, I would suggest you verify the 5volts to the display on pins 2 and 15.? Here is the schematic for the v5 Raduino.

The schematics for the v5 are available on the HFSignals web pages here:



73
Evan
AC9TU

Dennis Heikura
 

I have traced my no display problem to lack of power. Whap pin or pins on the bottom main board connector supplies power to the display assembly?. Thank Your


On Sat, May 14, 2022 at 8:18 PM Dennis Heikura via <wb7egg=[email protected]> wrote:
I recently finished up my version 5 and lo and behold to my surprise, I have no display. I have?
checked all the wiring over twice and cannot find any errors. Has anyone run into this problem.
All other functions appear to work but really cannot tell what's going on without the display.
Any advice would be appreciated. Thanks
73
Dennis Heikura, wb7egg@...
 

Dennis,

The display gets its power from the 5volt regulator on the Raduino board.? That is powered from the 12volts through pins 15 and 16 on the main display board.

I would verify the in and out voltages on the LM7805 regulator on the Raduino board.

73
Evan
AC9TU
Dennis Heikura
 

Evan, thanks for the info. I knew about the regulator. I? wanted to know the power input pins to confirm a possible bad regulator. When I received?my kit the? regulator was bent down almost?flush with the board surface.? I gently
straightened it back up. I checked the leads with a strong light and magnifying glass looking for cracks but none apparent. I will check voltages again. Thanks
Dennis

On Thu, Jun 16, 2022 at 11:27 AM Evan Hand <elhandjr@...> wrote:
Dennis,

The display gets its power from the 5volt regulator on the Raduino board.? That is powered from the 12volts through pins 15 and 16 on the main display board.

I would verify the in and out voltages on the LM7805 regulator on the Raduino board.

73
Evan
AC9TU

 

Dennis,

Rereading my post, it may not have been clear on how the 12volts get to the Raduino board, it is coming in on pins 15 and 16 of the header between the Raduino and the large motherboard.

The pins on an LM7805 are:


73
Evan
AC9TU

 

Dennis,
The 100 mil?16 pin female straight row headers used to connect the Raduino to the main PCB and the display on the Raduino are not keyed.
They can easily be misaligned with the pins being offset.? Since these are snap to size type, and often not cleanly finished on the edge you need to pay extra attention.
i.e. you may not see the pin hanging over the edge because it is nestled in a partially snapped off position.
Pull the Raduino from the main board and check that the display is properly fitted.? You can test the Raduino/Display stand-alone using the Nano USB as a power source.
Rgds,
Gary
Dennis Heikura
 

Thank you Evan and Gary. Yesterday I did some more checking and found a bad connection on the power socket. I resoldered it and now have power everywhere. 5 volts out of the regulator and 5 volts on pins 2 and 15 of
the display. Gary I will check to see if the display is properly fitted .and also try to power if up from the usb connector?on the auduino?board. (if I have a proper cable).. LOL Thanks so much for the help.

On Sat, Jun 18, 2022 at 5:50 AM Gary Anderson <gary.ag5tx@...> wrote:
Dennis,
The 100 mil?16 pin female straight row headers used to connect the Raduino to the main PCB and the display on the Raduino are not keyed.
They can easily be misaligned with the pins being offset.? Since these are snap to size type, and often not cleanly finished on the edge you need to pay extra attention.
i.e. you may not see the pin hanging over the edge because it is nestled in a partially snapped off position.
Pull the Raduino from the main board and check that the display is properly fitted.? You can test the Raduino/Display stand-alone using the Nano USB as a power source.
Rgds,
Gary

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