If the charge sheet is drafted in such a way that the delinquent is asked to explain why proceedings should not be initiated, then it is okay, you need not issue a separate show cause notice. However, after conducting a domestic enquiry and after receipt of the report you have to issue a show cause notice (commonly referred to as a second show cause notice) along with a copy of the enquiry report stating that the charges leveled against him have been proved and on the basis of the report the management has decided to impose punishment (which should be stated like termination, increment cut for 1/2/3 years, reduction to a lower grade/ demotion or fine as the case may be) and calling on him to show cause why the said punishment should not be imposed on him.
Regards,
Madhu.T.K