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Bitx40 No display


courier4000@...
 

I just finished the build and I power it on and Have power to everything except the Display?

Nothing.... did I miss a wire? If I plug in to the mini usb it powers up..... any Ideas?


Evan Hand
 

I would start with the simple and then go to more complex. 
Verify that you have the Raduino board plugged in correctly. I noted on my board that the socket on the Mac n board looks like the last pin connector has half of the plug left from when it was cut from the source strip. 

Next verify the 12v to the input of the 7805 regulator on the Radoino board. 

Fnally verify the tegulator output

the way the7805 is mounted in the Raduino board with the input closest to the main board, and output furthest away. 

Evan
AC9TU


Jack, W8TEE
 

I'm late to the disussion, but I'd load the Blink program to make sure the Nano is healthy, too.

Jack, W8TEE

On Tuesday, December 25, 2018, 10:11:21 PM EST, Evan Hand <elhandjr@...> wrote:


I would start with the simple and then go to more complex. 
Verify that you have the Raduino board plugged in correctly. I noted on my board that the socket on the Mac n board looks like the last pin connector has half of the plug left from when it was cut from the source strip. 

Next verify the 12v to the input of the 7805 regulator on the Radoino board. 

Fnally verify the tegulator output

the way the7805 is mounted in the Raduino board with the input closest to the main board, and output furthest away. 

Evan
AC9TU


Evan Hand
 

The 7805 regulator is not supplying power to the Raduino. When you plug in the USB connector, power is being supplied by the regulator on the nano board using power from the USB port.  


Curt
 

Make sure you adjust the pot that controls the backlight for the lcd. It goes from nothing to filling the screen. Careful adjustment is required to see anything.

Also check that the raduino isnt misaligned as mine has an extra partial row.

Curt


 

This is a BITX40 board!

At 26-12-18, you wrote:
I would start with the simple and then go to more complex.
Verify that you have the Raduino board plugged in correctly. I noted on my board that the socket on the Mac n board looks like the last pin connector has half of the plug left from when it was cut from the source strip.

Next verify the 12v to the input of the 7805 regulator on the Radoino board.

Fnally verify the tegulator output

the way the7805 is mounted in the Raduino board with the input closest to the main board, and output furthest away.

Evan
AC9TU


Evan Hand
 

Sorry. Did it again. Did not read the title. 


courier4000@...
 

Thanks to all who responded,
I was checking solder points with a meter... voltage ect and it blinked and blew a fuse( 2A)     now i get no hiss out of the speaker.... after replacing the fuse....
have good voltage in all points.... speaker checked out OK.