Recently, I purchased an Icom 728. The unit seems to work ok, But it transmitted on all frequencies. The common modification was to cut D5 on the PLL board to expand HF Tx operation. My rig had this modification, and I repaired it. After resetting the CPU, I found that I can still transmit outside of the ham bands. In most cases it's 600KHz total as in 6900 to 7500KHz.
I'd like to restore the rig to it's original state. Icom tech support won't give me any info. I assume that there's a more detailed modification than cutting D5 to achieve what I'm assuming is a MARS modification.
I originally posted this in the ELMERS forum, but didn't receive any helpful info, so I'll try here.
If anyone has any leads for me to try, please post them or contact me with the info. TNX