Goldstar GP 4303D Power Supply

[jrcurtis]

Am new user to the blog however been reading it and and watching on YouTube for years. Does anyone have a schematic or service manual for the GP 4303D Power Supply. I have a unit that works electrically, but the display jumps all around and cannot used to set the supply. Currently I'm using a DVM to set voltage and current limit, but would like to fix the display circuit. Any help would be appreciated. Jim