DEVELOPMENT OF TRAINING MANUAL FOR MAINTENANCE OF POWER SUB-SYSTEM OF RADIO AND DIGITAL VERSATILE DISC PLAYER FOR ELECTRONICS CRAFTSMEN
This study developed appropriate maintenance contents for training craftsmen in the power subsystem of the Radio and DVD player. One research question and one hypothesis guided the study. The study is Research and Development (R&D) and employed Wheeler’s model for instructional material development. The population for the study was 58 respondents which consisted of 32 electronics teachers in all the accredited science and technical colleges offering electronics trade and 26 master craftsmen with the NDE States head offices in the North-Central States of Nigeria. The instrument used for data collection was a questionnaire. The questionnaire solicited information on appropriate maintenance contents for training craftsmen in the power sub-system and has 89 structured question items organized under objective, task criteria, teaching content, and tools/materials. Data collected was analyzed using mean for the research question and t-test for the hypothesis. Emerging findings revealed appropriate maintenance objectives, task criteria, teaching content, and tools and materials for training craftsmen in the power sub-system. Some of the findings are; verify AC supply, verify the functioning of rectifiers, test the ON/OFF contacts of the main switch, replace and solder rectifier chip. Recommendations made include Radio and DVD player maintenance training module should be included in the craftsmen training program in Nigeria and the developed training manual should be adopted for training and retraining of craftsmen in the maintenance of R and DVD player.