Here are a component placement diagram with trimmerpot names. T1 are bulk amps, T2 current for the constant current stage (finishing charge), T3 is the threshold voltage for ending bulk charge and starting the finishing charge around 57.6 V for a 48V string. T4 is a No No it's a kind safty current limit for the charger and blows something when adjusted., The "thermal gel connector" is for the ptc temp sensor but some chargers are sold without the appropiate resistors to make it work. Personally I've blown my own K2 twice, also because of water!
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