AST RESEARCH, INC. TECHNICAL BULLETIN #0898 2-10-94 CUPID SYSTEMS LOOPBACK PLUG SCHEMATIC PROBLEM: There should be a jumper shown between pins 2 and 3 in the 9- Pin Serial Loopback Plug schematic on page 8 of the manual. Only the schematic is at fault, the jumper exists in the physical plug. CAUSE: Incorrect diagram. AST Advanced Diagnostics Supplement, part number 001239-001 A. SYSTEMS AFFECTED: AST Cupid Systems. SOLUTION: Future releases of the supplement will correct and update the drawing.