Elecraft KXB3080 - Manual (Page 11)

11
Verify that your KXB3080 PCB is properly connected as follows:
Make sure the loose end of the wire attached to pad F of the KX3080 PCB and routed through the
hole in the circuit via is not touching anything. It will be connected later.
Insert a milliammeter, preferably a digital multimeter (DMM), in series with a fused 8 to 14 vdc
power source connected to the KX1’s external power jack (J1).
Apply power to your KX1 and turn it on. Verify that the display lights as expected and the
milliammeter shows about 34 to 37 mA after the LED times out. If necessary, set the
LED menu
entry to a value below infinite ( INF ) so it will turn off for the current measurement. If the current
is much higher than 34 to 37 mA, it could indicate a short.
Enable both 30 and 80 meters in the Menu as described in the instructions supplied with the
firmware.
Use your DMM to verify about 5 vdc between KXB3080 pad 5 and ground.
Between pad D and ground, verify about 5 vdc on 30 and 80 meters, and 0 vdc on 20 meters.
Between pad D and ground, verify about 5 vdc on 40 meters below 6715 kHz and 0 vdc above
6715 kHz.
Between pad F and ground, verify about 5 vdc on 80 meters and 0 vdc on all other bands.
Disconnect power from the KX1.
Bend C15, on the bottom of the KX1 PCB, down against the PCB away from the access opening for
the C30A adjustment trimmer. This is the capacitor you stood up to access solder pad G near the encoder.
Peel the paper packing off of the two rubber pads and affix them to the KXB3080 PCB as shown in
Figure 7. The pads ensure the KXB3080 PCB does not touch the top cover when the case is reassembled.