Many manuals for Sharp microwaves can be found on the Support section of its website. You must have the model number of the microwave you are looking for in order to find the correct manual.
You can search by model number to find manuals and answers to other questions regarding any Sharp product. Sharp's service page also lists other ways to get in touch with customer service including live chat, phone number, and Facebook and Twitter information. The company also provides information about how to get service and parts for issues that require a professional. If you need a paper copy, contact customer services at 800-237-4277.