This module is the seventh of 10 modules in the competency-based electronics series. Introductory materials include a listing of competencies addressed in the module, and a cross-reference table of instructional materials. Three instructional units cover: block diagrams; board-level repairs; and component-level troubleshooting. Each unit includes some or all of the following components: performance objectives; information sheets; transparency masters; handouts; assignment sheets; job sheets; and unit test with answer key. Special instructions are included in the notes to the instructor section near the beginning of each unit. (YLB)