> A few things to check. Is either of the outputs presenting a steady state voltage that is > near you power supply voltage or 0 volts or do you measure some odd voltage?
One output is at supply voltage, the other is at 0v.
> Do you have 5V at pin 14?
yes on both chips.
>If you had access to a scope I would suggest checking pin 3 to see if your getting some >indication the timing circuits working.
Agreed - I used to have access to one. Not these days though.
>
>What is the voltage on Pin 9 of the LMD?
Supply voltage (25.7v).
I swapped the LMD's in the circuit and the fault moved accordingly. All input voltages match up and the signal is being received from the PIC, so it is looking like a dead LMD. I will order a replacement this week.
Cheers
Jason. |