I am trying to find a fault in my KDSP2. Do circuit diagrams of the two
boards exist with higher resolution of the logic signals? Many of the
signals in the diagrams in the manual seem to be done with a low
resolution dot matrix printer and they are awfully hard to read.
The LED lights up and does not go out. In menu, RTC can be turned off
or on, but when on, no DSP menu can be accessed. Repeated holding AFIL
cycles through the filters. SSB signals are heard in the speaker but
sound as if they come through a narrow filter, or are distorted. I am
trying to trace the lines from the on board connector pins to their
connections on the board. So far, I have only found a missing link from
pin 20 of J2 to U7 which I have repaired.
I have tried a new microcontroller U1, but no go.
Maybe the simplest way out of this is to buy a new KDSP2.
73
Kevin
VK3DAP / ZL2DAP
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