LG RD-JT30 Service Manual page 139

The Power Factor Controller IC is L6561 , The function of each pins described as follow.
pin 1 : voltage feedback input
pin 2 : compensation
pin 3 : multiplier input
pin 4 : current sense input
6.3.5 Transformer and snubber circuit of Sub Power Board
pin 5 : zero current detect input
pin 6 : gnd
pin 7 : drive output
pin 8 : vcc