My club has an IC-820H which suddenly has no (measurable) transmit power on 2M. The radio transmits fine on 70cm and receive is fine on both bands. Transmitting into a dummy load, there is no power shown on either the internal meter or an external SWR meter. Hooked up to an antenna, the signal is very weak but can still be heard with a handheld radio and it sounds alright.
I have a copy of the service manual and have verified that all the specified voltages on the VHF PA board are correct, except for the FORA signal (measures forward power) which is at 0v.
I am pretty sure that the SC-1113 RF power module is the problem but since it is an expensive part I want to be sure that it's the issue. Can anyone think of anything I'm missing or that I should check?
Thanks in advance.
Ian