In the middle of a faultfinding session and thought I'd share my problem with the fine minds out there. Got an FT-902DM on my bench. Problem is low power output on SSB of approx 50W. CW mode is fine at 100W+. The ALC kicks in way to early on USB or LSB, restricting the power. No ALC indication in CW mode - normal?

Thoughts:
1) In USB or LSB the SG supply voltage might be low indicating a supply voltage switching problem between SSB, CW and FM, AM modes. Will test this tomorrow.

2) I can't find the ALC adjustment. Spent ages looking for it, maybe there isn't one and power is regulated by (1). Could the ALC voltage be too much due to a resistor going high in the final?

3) Mode switch appears to have taken a knock. Perhaps a switch on it has been damaged, resulting in incorrect SG supply voltage selection?