MP3086

This item was donated in a broken state. It had a missing coarse voltage potentiometer. MP3086 PSU
Tracking action performed:
date: 07/12/2018 : output voltage according to digital display 56V. Try loading it and measuring current. Try a 20K potentiometer.
PIC16F690

The digital display is supplied by 12-0-12V winding from the main transformer. yellow-black-red
The display board utilises HT1621B from Holtek along with 7806 and 7812.