Akron, Ohio-based Telxon Corp says it expected turnover for the second half of its fiscal year to March 1993 to be in the range of $101m to $108m to give consolidated revenues for fiscal 1993 of between $235m and $242m, compared with expectations of $255m to $265m; profits will be around the break-even mark compared with hopes of $1.15 to $1.20 per share; charges will push it into a small loss; the maker of handheld data collection terminals blames lower than expected sales levels, increased marketing and product development expenses and one-time non-recruiting costs; the expected decline in sales levels in the second half of fiscal 1993 compared with the first reflects the absence of large-volune sales to a single buyer, the decision to forego some very low gross margin sales and a move to raise backlog.