hsize is VR2 (100k pot) if no change...
check Q3 (2sc2073), R31(5.6ohm/2w), C24(.7uF@400v)
emitter voltage of Q1(2sc458) should be around 19.3v / collector Q3=27v , base=20v
'lytic caps C6-8 (10uF/50v),C16(22uF/50v),C9(4.7uF/50v)and C19(5.6uF/50 non-polarized i.e. bipolar)will have an effect with value change/high esr, etc....
not the best rendering , but have a print if u wish ....pm request

qrz