I've been having some problems with an ICOM
M802 SSB radio
not powering up. I'm not sure it ever worked exactly as it was supposed to, but it at least used to turn on. I've tried contacting ICOM
but haven't had any luck with phone
When the power button is pressed, almost nothing happens. Occasionally, you can see some of the LCD blocks filling in very faintly before they fade away completely.
The transceiver unit is getting 13.8 volts through the power cable. I've checked both the internal and external fuses
and both are good.
The next step in my debugging process would be to check that the controller unit is connected to the transceiver properly. I took some measurements from the 8-pin Mini DIN cable that goes between the two, but unfortunately that pinout is missing from the manual. Does anyone know/is anyone able to check whether these voltages I've measured are correct?
All values measured from the ground shield on the plug
to each pin.
Pin 1: 0.00 VDC
Pin 2: 0.00 VDC
Pin 3: 0.00 VDC
Pin 4: 0.03 VDC
Pin 5: 0.00 VDC
Pin 6: 2.00 VDC
Pin 7: 0.12 VDC
Pin 8: 0.13 VDC
Pin numbers are based on this
image but obviously their purposes may differ.
Thanks in advance for any help.