FAQs & Troubleshooting FAQ Search Results FAX-878 Not your product? Search by FAQ ID number Search Back to FAQs & Troubleshooting. 2 Results 1.faq00000261_035 How do I clean the Scanner to improve the copy or fax quality? 2.faq00000261_011 How do I improve the copy or fax quality? FAQs & Troubleshooting