Re: FT-817 almost powers up
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Update - With the main PCB completely removed from the radio chassis and a jumper installed across Q1082, I was able to see good 9v, 6v, and 5v lines. ?From there, I installed the front panel unit ribbon cable and observed good 5V and 13US on the front panel PCB. ?I followed 13US back to vreg Q4013 and Q4014 which both had a good 5v on the output.
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The front panel LED D4009, TX and Busy hang off the output of Q4013, so if you're seeing this illuminated like I am, you could assume 13US is reaching the front panel.
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There are some signals directly from the CPU I need to chase around when I get the time. ?For now, I'm just going to let the radio finish its charge cycle with the Q1082 jumper removed and no batteries installed. ?Maybe the CPU is stuck in a weird state that the factory reset couldn't clear.
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