update: this clock setup is incorrect!, the second clock starts too late and last too long. It must finish before the first clock rises.

The clocks are adjusted to run at 500 KHZ. Note that the build manual mentions that clocks are supposed to be self starting, but may not start with some user power supplies. Sure enough, I’m seeing this issue with my bench supply. It is easy to kick start by shorting both ends of electrolytic cap C9 (located near trim pots). Note that adjusting these clocks takes a bit of twiddling.