Aleph J PSU thermistor

Hi Guys
In the aleph J PSU, which is the function of the TH1 thermistor circled in red?

PSU.JPG


he is critical to safety?
In my Aleph J the metallic 4U chassis it's completely isolated except from the IEC earth. The GND PSU, all speaker terminals and RCA connectors are completely isolated from chassis and TH1 is not mounted.
It's correct or not safe for electric shocks?
Thanks
 
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