FRIDAY The Motown Revue (NBC, 9-10 p.m.): New five-part musical series which salutes Detroit's music of the '60s-'80s with guests including Stevie Wonder, Smokey Robinson, and the Four Tops. Missing, unfortunately, are Diana Ross and the Supremes. Remember them? Before there was Diana Ross, solo. SATURDAY
PGA Championship (ABC, 3:30 p.m.; Sunday, too): Live golf from Cherry Hills Country Club in Englewood, Colo. Two swinging afternoons.
Ivanhoe (CBS, 8-11 p.m.): Repeat of classic Anthony Andrews (Sebastian of ``Brideshead'') version of Sir Walter Scott novel first aired in 1982. It's also a chance to see the late, beloved James Mason doing one of his typically superb jobs as a Jewish merchant. SUNDAY
National Geographic Explorer (Cable/Nickelodeon, 5-8 p.m.): Three hours (in some areas) of travel, wildlife, etc., footage from the same people who give you the big show on PBS.
Disneyland's 30th Anniversary Celebration (NBC, 7-9 p.m.): Drew Barrymore and John Forsythe host a salute to Disney's dream-theme park in a repeat performance. It's the easy way to escort the kids to Disneyland.
The Electric Horseman (ABC, 8-10:30 p.m.): Repeat of Fonda/Redford drama, directed by Pollack, about one of the last rodeo cowboys. A classic of a sort. But anything with Jane and Robert becomes an instant classic, doesn't it?
Her Life as a Man (NBC, 9-11 p.m.): Repeat of feminist drama about a woman journalist who masquerades as a man and finds out that life isn't easy either way.
Evening with Andrew Lloyd Webber (Cable/Arts & Ent., 9-10:30 p.m.): The works of, the composer of ``Cats'' and ``Evita,'' including guest star Pl'acido Domingo singing other songs from the Webber repertoire to prove that not everything sounds alike.
James Jones: Reveille to Taps (PBS, 10-11 p.m.): Portrait of the author of ``From Here to Eternity,'' from boyhood to manhood, all of it macho. MONDAY
Alive From Off Center (PBS, 10-10:30 p.m.): If you're still willing to watch avant-garde, Spalding Gray presents avant-garde autobiographical monologues. TUESDAY
Two of a Kind (CBS, 8-10 p.m.): Repeat of moving story of a nursing- home patient and his retarded grandson developing rapport, sensitively acted by George Burns and Robby Benson.
West 57th (CBS, 10-11 p.m.): Premi`ere of new ``Yuppie'' newsmagazine show which promises information with a disco beat. ``60 Minutes'' isn't worried. WEDNESDAY
I Had Three Wives (CBS, 8-9 p.m.): Premi`ere of new summer series about a private eye who calls on all his ex-wives to help solve problems. Police problems, that is.
Ballad of the Irish Horse (PBS, 8-9 p.m.): Repeat of National Geographic special on these horses and the two-legged creatures around them.