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Controller Trim-Pots. It is believed that the left 3 trim-pots are for the pump diode TEC, the next one is for the pump diode current limit, the middle group is for the lasing crystal heater, and the right group is for the SHG heater. Exactly why there are 3 trim-pots for each of the temperature loops is not clear as only one appears to adjust the set-point. Perhaps the others are to optimize the loop parameters. Some of these are educated (or wild) guesses; only the current limit trim-pot location is known for sure.
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