Jobless Up in EEC World:  
Unemployment in the European Common Market rose by 200,000 to 6.2 million in January from December, the EEC statistics office reported yesterday.</br></br>The agency said the figures represented 5.9 percent of the working population compared with 5.7 percent in December. In January 1977, 5.9 million, or 5.6 percent, w6re unemployed.</br></br>APRIL OPENING: Hitachi Ltd., a Japanese television manufacturer, said yesterday it expects U.S. and Japanese government approval of its joint venture with General Electric Co. in time to begin operations in April at Portsmouth, Va.</br></br>GE agreed to the $38 million joint operation in December. The Ports-mount plant is to produce small, inexpensive, color and black-and-white TV sets. The new company formed for the operation, General Television "Plans call for initial production of no less than 1 million sets a year,Û a Hitachi spokesman said. "The venture will provide job security for about 6,300 (persons), all American workers but (for) a few Hitachi technicians."</br></br>In the past decade, GEÛªs television work force has dropped from 17,500 employes to 5,400, partly due to the increased market share of Japanese firms. Some new workers will be hired for the Portsmouth plant, the companies said.