This line-up is from the national cable version of WGN:
6 AM One Day At A Time
8 AM Banana Splits
8:30 The Bozo Show
9:30 Cooky's Cartoon Club
10 AM Trapper John M.D.
11 AM The Joan Rivers Show
12 N Geraldo
1 PM WGN News
2 PM The Dick Van Dyke Show
2:30 Gidget
3 PM One Day At A Time
3:30 Leave It To Beaver
4 PM The Flintstones
4:30 Ducktales
5 PM Chip N Dales Rescue Rangers
5:30 M.A.S.K.
6 PM The Andy Griffith Show
6:30 I Dream Of Jeannie
7 PM Night Court
7:30 The Andy Griffith Show
8 PM Baseball:Chicago Cubs At Montreal Expos
11 PM WGN News
11:30 Magnum P.I.
12:30 Movie:Scarecrow
2:30 Tales From The Darkside
3 AM The Facts Of Life
3:30 Soap
4 AM Movie:Eddie Macon's Run

WGN(Cable) was a lot different than it is right now because the channel air Bozo the Clown and repeats of various pre-2000s programming.

I remember seeing that schedule on Sarah’s Rugrats the Rugrats official website as they were celebrating 10 years of Rugrats. They had an exclusive page for it and I saw both the national and local feed schedules for WGN that week as well as the ones for WWOR. And it talked about the Syndex law.