This guide is designed to alert readers to the scope and variety of programming coming up. Listing is not meant to represent blanket endorsement. Viewers are urged to be selective. FRIDAY
CBS Summer Playhouse (CBS, 8-9 p.m.): Premi`ere of a comedy-drama anthology with a twist: Viewers can ``vote'' on these ``pilot'' programs by phoning in their opinions at the end of each show.
CBS Late Night (CBS, 11:30 p.m.-12:30 a.m.): ``In Person at the Palace.'' Rock and pop groups perform live at Hollywood's (not New York's) Palace in this series premi`ere.
`Bopha!' (PBS, 10-11 p.m., check local listings): Documentary - shot in South Africa and narrated by Sidney Poitier - about black theater's satire on the plight of black police in that country. (Please see preview, next page.)
Wonderworks (PBS, 8-9 p.m., check local listings): ``The December Rose'' - Part 2 of a two-part story of a chimney sweep in Victorian London.
Spirit of Adventure (ABC, 5-6 p.m.): ``Beneath the Sea - The Galapagos'' - Daring and pictorially impressive close-ups of underwater life, including rare encounters with a sperm whale and Galapagos sharks.
NBA Basketball (CBS, 3:30-6 p.m., EDT): If the Los Angeles Lakers have not already won four games, the Boston Celtics will face them in Game 6 of pro basketball's championship series.
NBA Basketball (CBS, 9-11:30 p.m., ET): Seventh and final game in the championship series, if still undecided.
Frontline (PBS, 9-10 p.m., check local listings): ``Keeping the Faith'' - a look at the role of the black church in America as the black middle class grows.
The Presidency and the Constitution (PBS, 10-11 p.m., check local listings): ``A Call for Repairs?'' A distinguished panel examines the structure of the United States government and considers hypothetical changes.
Twenty Years on the Road with Charles Kuralt (CBS, 8-9 p.m.): Anniversary of the popular and often penetrating news feature is celebrated with a retrospective of people and places he has covered.
Not Your Average Russian: `The Pozner File' (PBS, 8:30-9 p.m., check local listings): This documentary profiles Vladimir Pozner, an unofficial Soviet spokesman who grew up in New York, left, and came back to the US for the first time after 38 years.
Moyers: In Search of the Constitution (PBS, 8-9 p.m., check local listings): ``1987 vs. the Constitution'' - Moyers and his guests discuss drug testing, computer dossiers, and the president's war powers as these issues relate to the Constitution.
Hours that programs are aired may vary according to time zone. Please check listings for all PBS programs, since local option often results in different days and times.